CN112314159A - Working machine and combine harvester - Google Patents

Abstract

The present application relates to work machines and combine harvesters. The work machine of the present invention has a drive device for driving a radiator cooling fan by power of an engine, and the drive device has two systems of power transmission mechanisms, each of which is: a forward rotation system power transmission mechanism capable of transmitting a forward rotation force through an annular rotation belt; and a reverse rotation system power transmission mechanism capable of transmitting a reverse rotation force via another endless rotation belt, and the work machine of the present invention further includes: and a forward/reverse rotation selection mechanism (6) capable of selecting one of the power transmission mechanisms and transmitting the selected power to an input rotary body (72) of the radiator cooling fan.

Description

Working machine and combine harvester

The present application is a divisional application of the following applications:

the invention name is as follows: working machine and combine harvester

Application date: 08 Yue 05 of 2014

Application No.: 201910210046.9

Technical Field

The present invention relates to a working machine and a combine harvester.

Background

(background art 1)

As described above, the technique described in patent document 1 is known as a working machine having a driving device capable of driving a radiator cooling fan in forward and reverse directions.

The work machine described in patent document 1 includes a normal rotation pulley that contacts an inner peripheral side of a first belt that is wound around an input pulley attached to an output shaft of an engine, an input pulley for driving a radiator fan, and an input pulley of an alternator, and a reverse rotation pulley that contacts an outer peripheral side of the first belt. The second belt is wound around a portion between the input pulley for driving the radiator fan and the normal rotation pulley and the reverse rotation pulley.

Further, the input pulley for driving the radiator fan can be switched between the normal rotation state and the reverse rotation state by switching the operation state of the normal rotation pulley and the reverse rotation pulley on the first transmission belt between the normal rotation state in which the normal rotation pulley is fastened and the reverse rotation pulley is disengaged and the reverse rotation state in which the reverse rotation pulley is fastened and the normal rotation pulley is disengaged with respect to the first transmission belt.

(background art 2)

As described above, a technology described in patent document 2 is known for a combine harvester that transmits power of an engine to a transmission and a threshing device that transmit power to a traveling device.

The combine harvester of patent document 2 has a transmission system that transmits driving force from an output shaft of an engine to a transmission case, and a transmission system that transmits driving force from an output shaft of an engine to a threshing device.

(background art 3)

The conventional combine harvester has an intermediate shaft which is located outside the front side of the threshing device and transmits power from an engine to the threshing device on the side opposite to the engine. The power of the engine is distributed and supplied from the intermediate shaft to a threshing cylinder of the threshing device, a device for sorting, a feeder for carrying crops, and the like (for example, see patent document 3).

(Prior art document)

(patent document)

Patent document 1: japanese patent application laid-open publication No. 2001-263063 (paragraphs 0022, 0023, FIG. 3 and FIG. 4)

Patent document 2: japanese patent application laid-open publication No. 158258 (paragraphs 0074, 0075, FIG. 5, FIG. 8, FIG. 10 and FIG. 12)

Patent document 3: japanese patent application laid-open publication No. 2012-60968 "

Disclosure of Invention

(problems to be solved by the invention)

Problem 1 "to be solved by the invention corresponding to" background art 1 "described above is as follows.

In the engine cooling device for a work vehicle described in patent document 1, the normal rotation pulley and the reverse rotation pulley are switched between normal rotation and reverse rotation by changing the fastening direction between 2 opposite directions, i.e., a direction in which the normal rotation pulley is fastened to the inner circumferential surface of the first belt and a direction in which the reverse rotation pulley is fastened to the outer circumferential surface of the first belt, with respect to the first belt. Thus, the forward and reverse rotation of the input pulley for driving the radiator fan can be switched by selecting the tightening action of the first transmission belt exerted by one of the forward rotation pulley and the reverse rotation pulley. Therefore, the forward-reverse switching configuration can be obtained by a simple configuration.

However, according to this configuration, the normal rotation pulley and the reverse rotation pulley are used not only for switching the first transmission belt between the tensioned state and the slack state, but also as members that transmit power. That is, the normal rotation pulley and the reverse rotation pulley not only have a function of changing the tension of the transmission belt but also serve as power transmission members. Therefore, in order to apply a frictional force capable of transmitting power to the normal rotation pulley and the reverse rotation pulley, it is necessary to expand the winding range of the transmission belt with respect to the normal rotation pulley and the reverse rotation pulley.

However, when switching from a state in which transmission is performed with a large belt winding range around the peripheral surface of one of the normal rotation pulley and the reverse rotation pulley to a state in which the belt winding range around the peripheral surface of the other pulley is large, the normal rotation pulley and the reverse rotation pulley need to be moved to be largely swung, and the belt winding range around the normal rotation pulley and the reverse rotation pulley needs to be increased.

Therefore, there are problems that the slack of the belt during the forward/reverse switching operation is large, the belt is likely to separate from the pulley circumferential surface, or the forward/reverse switching operation is difficult to be performed quickly, and the like, and there is still a need for improvement in these problems.

In view of the above, it is desirable to provide a work machine having a simple structure, which can transmit power from an engine to a radiator cooling fan reasonably.

Problem 2 "to be solved by the invention corresponding to" background art 2 "described above is as follows.

The combine harvester described in patent document 2 is provided with a transmission mechanism for transmitting power from the engine to the threshing device, the transmission mechanism inputting the power of the engine to the sub-windmill shaft located at a high position of the threshing device, and distributing the driving force from the sub-windmill shaft to each part of the threshing device.

However, in the case of a threshing device without an auxiliary windmill, in order to transmit the engine power to the main windmill shaft at a lower position, it is necessary to separately dispose the engine and the threshing device so that the transmission pulley can be wound between the engine and the threshing device, or to separately provide a relay shaft so that the power is transmitted from the engine to the main windmill shaft, and therefore, there is still room for improvement in this point.

In view of the above, it is desirable to provide a combine harvester having a reasonable structure for transmitting power from an engine to a threshing device and a simple structure.

Problem 3 "to be solved by the invention corresponding to" background art 3 "described above is as follows.

In the above-described conventional structure, since the intermediate shaft is located outside the front portion side of the threshing device, an installation space for installing the intermediate shaft on the front portion side of the threshing device is required, and thus the installation of the threshing device is restricted, for example, the threshing device may be reduced in size in the front-rear direction, or the threshing processing capacity may be reduced.

In the configuration described in patent document 3, power is distributed to a low-speed drive type device (such as a grain conveying device) in which an intermediate shaft is driven at a low speed, and a high-speed intermediate shaft is provided in addition to the intermediate shaft, and power is distributed to a high-speed drive type device (such as a grass discharge processing device) in which the high-speed intermediate shaft is driven at a high speed. Here, instead of this structure, it is conceivable to simplify the transmission structure by sharing the intermediate shaft.

That is, power is directly distributed from the intermediate shaft to each of the high-speed drive type device and the low-speed drive type device. In addition, in the case of the above-described configuration, since it is necessary to convert the power to an appropriate rotational speed for each device after distributing the power to the intermediate shaft, a configuration for largely changing the speed is required, and for example, a space for installing a large rotating body is required, which is disadvantageous in configuring the transmission mechanism.

In view of the above, it is desirable to provide a combine harvester capable of reducing an extra installation space and reasonably arranging a machine body while simplifying a transmission structure.

(means for solving the problems)

The "solution to problem 1" corresponding to the "problem to be solved by the invention 1" described above is as follows.

Specifically, the work machine according to the present invention includes a radiator, a radiator cooling fan, and a drive device for driving the radiator cooling fan by power of an engine, the drive device including two power transmission mechanisms, each of which includes: a forward rotation system power transmission mechanism capable of transmitting a forward rotation force through an annular rotation belt; and a reverse rotation system power transmission mechanism capable of transmitting a reverse rotation force via another endless rotation belt, and the drive device further includes a forward/reverse rotation selection mechanism capable of selecting one of the powers of the power transmission mechanisms of the two systems and transmitting the selected power to the input rotation body of the radiator cooling fan.

According to the present invention, the heat sink cooling fan is rotated in the forward direction by selecting one of the endless rotating belt of the forward rotation system power transmission mechanism capable of transmitting the forward rotational force and the endless rotating belt of the reverse rotation system power transmission mechanism capable of transmitting the reverse rotational force by the forward/reverse rotation selection mechanism, and transmitting the power from the one of the endless rotating belts to the input rotating body of the heat sink cooling fan.

Therefore, the forward/reverse rotation selecting mechanism itself is not required to function as a power transmitting mechanism as long as it can transmit the power of the endless rotating belt of the power transmitting mechanism in either of the forward and reverse rotation to the input rotating body of the radiator cooling fan.

Thus, the forward/reverse selection mechanism does not require a mechanism for expanding the winding range of the endless rotary belt for transmitting power, and an operation for achieving the purpose, and the like, and can be simplified in structure and improved in ease of operation.

In the present invention, it is preferable that the endless rotating belt of the normal rotation power transmission mechanism and the endless rotating belt of the reverse rotation power transmission mechanism are wound around the input rotating body.

According to this configuration, both the endless rotating belt of the normal rotation power transmission mechanism and the endless rotating belt of the reverse rotation power transmission mechanism are wound around the input rotating body, and thus the structure of the input rotating body can be simplified. Further, since only the power of the endless rotating belt transmitted to either the forward rotation side or the reverse rotation side is transmitted to the input rotating body, the forward and reverse rotation of the radiator cooling fan can be reliably switched.

In the present invention, it is preferable that the endless rotating belt of the normal rotation power transmission mechanism and the endless rotating belt of the reverse rotation power transmission mechanism are wound around the same driving rotating body.

According to this configuration, since the rotation in the same direction is transmitted to the endless rotating belt of the forward rotation power transmission mechanism and the endless rotating belt of the reverse rotation power transmission mechanism, the power can be transmitted to both endless rotating belts by the same driving rotating body.

Therefore, a member for forward/reverse switching can be omitted on the side of the drive rotating body transmitting the driving force, and the structure is simple.

In the present invention, it is preferable that, in the endless rotating belt of the normal rotation power transmission mechanism and the endless rotating belt of the reverse rotation power transmission mechanism, an inner peripheral surface side of an inner peripheral surface of one of the endless rotating belts contacts the input rotating body, and an outer peripheral surface side of the other endless rotating belt contacts the input rotating body.

According to this configuration, the endless rotating belt of the normal rotation power transmission mechanism and the endless rotating belt of the reverse rotation power transmission mechanism are rotated in the same direction, and in the state of contact with the input rotating body, the endless rotating belt is wound so that the inner peripheral surface side of one endless rotating belt contacts the input rotating body, and the endless rotating belt is wound so that the outer peripheral surface side of the other endless rotating belt contacts the input rotating body, whereby the rotation transmission direction of the input rotating body can be switched between normal and reverse.

Therefore, the power transmission of the forward rotation system and the power transmission of the reverse rotation system can be performed by the winding method of the endless rotating belt with respect to the input rotating body without requiring a special component or the like, and the structures of the forward rotation system power transmission mechanism and the reverse rotation system power transmission mechanism can be simplified.

In the present invention, it is preferable that wheel bodies are provided on both sides of a virtual line segment connecting the axial center of the driving rotary body and the axial center of the input rotary body, the wheel bodies being located on the inner circumferential surface side of the endless rotary belt wound so that the outer circumferential surface side of the endless rotary belt contacts the input rotary body, and either one or both of the wheel bodies are movable to a side where the endless rotary belt wound so that the outer circumferential surface side of the endless rotary belt contacts the input rotary body is tensioned or relaxed.

According to this configuration, the annular rotating belt is provided with the annular rotating belt wound around the inner peripheral side of the wheel body, the wheel body is dispersed on both sides of the virtual line segment connecting the axis of the driving rotating body and the axis of the input rotating body, and the annular rotating belt is wound so that the outer peripheral side thereof contacts the input rotating body. Further, since either one or both of the wheel bodies can be moved to the side where the endless rotating belt is tensioned or loosened, and the outer circumferential surface side of the endless rotating belt contacts the input rotating body, the wheel body can be moved to the tensioned or loosened side where the endless rotating belt wound so that the outer circumferential surface side contacts the input rotating body is maintained in a state where the winding range of the input rotating body is large.

Therefore, the movement of the wheel body itself with respect to the endless rotating belt is an operation of fastening or unfastening in one direction to the inner peripheral side of the endless rotating belt, and the amount of movement of the wheel body is small, and the tightening or loosening can be performed while maintaining a large winding range of the input rotating body to be wound around the endless rotating belt.

In the present invention, it is preferable that the annular rotating belt of the normal rotation power transmission mechanism is wound so as to contact the input rotating body on an inner circumferential surface side of an inner circumferential surface.

Generally, the endless rotating belt of the normal-rotation power transmission mechanism is used frequently or for a long time during the operation time of the working machine. According to this configuration, since the endless rotating belt of the normal rotation power transmission mechanism is wound so that the inner peripheral surface side contacts the input rotating body, the winding range of the input rotating body to be driven can be easily expanded. This makes it possible to easily maintain the transmission efficiency of the normal rotation power transmission mechanism, which is frequently used or has a long service life, in a good state.

In the present invention, it is preferable that the forward/reverse rotation selection mechanism is constituted by a tension clutch capable of transmitting or cutting off power by selectively selecting and tightening or loosening the endless rotating belt of the forward rotation power transmission mechanism and the endless rotating belt of the reverse rotation power transmission mechanism.

According to this configuration, the forward/reverse rotation selection mechanism is constituted by the tension clutch that tensions or loosens the endless rotating belt so that the endless rotating belt of the forward rotation power transmission mechanism or the endless rotating belt of the reverse rotation power transmission mechanism is in a transmission state.

In the present invention, it is preferable that the first tensioner wheel body and the second tensioner wheel body of the forward/reverse rotation selection mechanism are supported by a single swing arm, the first tensioner wheel body acts on the endless rotating belt of the forward-rotation power transmission mechanism, and the second tensioner wheel body acts on the endless rotating belt of the reverse-rotation power transmission mechanism.

According to this configuration, the first tension pulley body of the forward rotation system power transmission mechanism and the second tension pulley body of the reverse rotation system power transmission mechanism are supported by a single swing arm, and the forward/reverse rotation selection mechanism can be simplified.

In the present invention, preferably, an axial center of the swing arm and an axial center of the input rotary body are the same axial center.

According to this configuration, the axis of the swing arm and the axis of the input rotary body are the same axis, and the forward/reverse rotation selection mechanism can be further simplified.

In the present invention, it is preferable that the forward/reverse rotation selecting mechanism includes an urging mechanism that urges the forward-rotation power transmitting mechanism so that the endless rotating belt is in a tensioned state.

In general, the normal-rotation power transmission mechanism is frequently used or used for a long time during the operation time of the working machine. According to this configuration, since the forward/reverse rotation mechanism includes the urging mechanism for urging the forward rotation power transmission mechanism so that the endless rotation belt is in a tensioned state, the reverse rotation driving operation can be intentionally performed only when the reverse rotation power transmission mechanism having a low frequency of use or a short period of use is used, and the forward rotation driving state can be automatically restored after the operation is completed.

In the present invention, it is preferable that the forward/reverse rotation selecting mechanism has an operating lever capable of operating the swing arm.

According to this configuration, since the operating lever capable of operating the swing arm is provided, the forward/reverse switching can be easily manually operated.

In the present invention, it is preferable that the operating lever extends to a side opposite to a side where the engine is located.

According to this configuration, since the operating lever extends to the side opposite to the side on which the engine is located, it is not necessary to avoid the peripheral devices of the engine and the operation can be easily performed in a relatively sufficient space.

In the present invention, it is preferable that the engine body is covered on the outer side in the lateral direction by a side cover, and the operating lever is exposed to the side not covered by the side cover.

According to this configuration, the operation lever can be easily operated without opening and closing the side cover.

In the present invention, it is preferable that the operating lever is connected to the swing arm.

According to this configuration, since the swing arm can be directly operated by the operating lever, an extra connecting structure is omitted, and the forward/reverse rotation selecting mechanism can be further simplified in structure.

In the present invention, it is preferable that power from the engine is transmitted to the drive device.

According to this configuration, it is not necessary to separately provide a driving means such as an electric motor for driving the forward/reverse rotation selecting mechanism, and engine power for driving various working devices and traveling systems as the working machine is effectively used, so that the cost can be reduced.

In the present invention, it is preferable that the drive rotor around which the endless rotating belt of the normal rotation power transmission mechanism and the endless rotating belt of the reverse rotation power transmission mechanism are wound is also used as a relay rotor of a power transmission system that transmits power from the engine to the radiator cooling fan.

According to this configuration, the drive rotor that transmits the driving force to the forward/reverse rotation selecting mechanism also serves as a relay rotor included in a power transmission system that transmits the driving force from the engine to the radiator cooling fan, and therefore, the structure can be simplified and the cost can be reduced by using the components also.

In the present invention, it is preferable to have: an endless rotating belt wound between the driving rotating body and an output pulley of the engine; and a tension mechanism including a rotating body that is tensioned to act on the endless rotating body and a swing arm that supports the rotating body, wherein the rotating body is located on a downstream side in a rotation direction of the endless rotating belt from a swing axis of the swing arm.

According to this configuration, the tension of the endless rotating belt wound between the driving rotating body and the output pulley of the engine can be adjusted by the tension mechanism. In this tensioner mechanism, the rotary body capable of acting on the endless rotary belt is located on the downstream side in the rotation direction of the endless rotary belt from the pivot axis of the swing arm supporting the rotary body, and therefore, an excessive force is less likely to act on the endless rotary belt. Thus, the tension of the endless rotating belt can be adjusted, and the endless rotating belt is not easily separated from the driving rotating body or the output pulley.

In the present invention, it is preferable that the engine is disposed in a state in which an output shaft of the engine is oriented in a left-right direction at a lateral side portion of a traveling vehicle body, and the radiator is disposed at a vehicle body rear side portion of the engine, a vehicle body front side portion of the engine, or a vehicle body upper side portion of the engine.

According to this configuration, the total length of the engine and the radiator in the axial direction can be reduced as compared with the case where the radiator is disposed in the axial direction of the output shaft of the engine. Therefore, the engine can be disposed on the outside of the machine body as much as possible, and the inside of the machine body can be used as a space for disposing other devices and the like, and the engine can be easily maintained from the outside of the machine body.

In the present invention, it is preferable that the endless rotating belt of the normal rotation system power transmission mechanism and the endless rotating belt of the reverse rotation system power transmission mechanism are wound around a driving rotating body, the driving rotating body has a plurality of winding portions around which an endless rotating belt of the driving device for driving the radiator cooling fan and a power-side endless rotating belt for transmitting power from the engine are wound in a tensioned state, and the power-side endless rotating belt is located further to the outside of the machine body than the endless rotating belt of the driving device.

According to this configuration, the transmission system from the engine disposed on the outside of the machine body to the radiator cooling fan disposed on the inside of the machine body can be arranged reasonably by the power-side endless rotating belt and the endless rotating belt of the drive device for driving the radiator cooling fan.

In the present invention, it is preferable that the output shaft of the engine includes: a fan pulley for transmitting power to the radiator cooling fan; and a compressor pulley that transmits power to a compressor of an air conditioner, wherein the fan pulley is located closer to the engine than the compressor pulley.

According to this configuration, the compressor pulley is located outside, and maintenance of the power transmission system for transmitting power to the compressor is facilitated.

In the present invention, it is preferable that a guide member that regulates a displacement amount of the endless rotating body is provided in a direction orthogonal to a rotational direction of the endless rotating body wound around the input rotating body.

According to this configuration, since the amount of displacement of the toroidal rotating body wound around the input rotating body in the direction orthogonal to the rotational direction of the toroidal rotating body is restricted, the toroidal rotating body can be prevented from coming off the input rotating body by the guide member.

The "solution to problem 2" corresponding to the "problem to be solved by the invention 2" described above is as follows.

Specifically, the combine harvester of the present invention includes: an engine; a transmission for transmitting a driving force to a traveling device; and the power of the engine is transmitted to the threshing device through the input shaft branch of the gearbox.

According to the invention, the power of the engine is first transmitted to the input shaft of the gearbox located further away from the engine than to the threshing device located closer. Then, the power transmitted to the input shaft of the transmission is transmitted to the traveling device on the transmission downstream side as a driving force for traveling. In addition to the power transmitted to the traveling device, the input shaft outputs driving force to the threshing device, and the driving force is branched and transmitted to the threshing device.

That is, by effectively using the input shaft of the transmission, which is essential in the transmission mechanism of the traveling system, as the relay shaft of the transmission system of the threshing device, it is possible to realize: a transmission mechanism capable of transmitting power from an engine to a threshing device without any obstacle even if an output part of the engine and an input part of the threshing device are close to each other in a front-rear direction.

In the present invention, it is preferable that an output rotating body that transmits power to the threshing device side is provided on the input shaft.

According to this configuration, the power transmission structure for transmitting power to the threshing device can be simplified by a simple structure in which the output rotating body is provided on the input shaft of the transmission.

In the present invention, it is preferable that an input rotating body is disposed on the input shaft, power from the engine is transmitted to the input rotating body, and an output rotating body that transmits power to the threshing device side is attached to the same side of the input shaft of the transmission as the side where the input rotating body is provided.

According to this configuration, since the input shaft is not limited on the side opposite to the side where the output rotary member for transmitting power to the threshing device is provided, it is possible to dispose other devices and the like, thereby increasing the degree of freedom in design.

In the present invention, it is preferable that the transmission case has a continuously variable transmission device for changing the speed of the power transmitted to the traveling device on the side opposite to the side where the output rotary member for transmitting the power to the threshing device is provided.

According to this configuration, the transmission case has the continuously variable transmission device for changing the speed of the power transmitted to the traveling device on the side opposite to the side where the output rotary member is provided, and thus the input shaft of the transmission case can be used as the input member of the continuously variable transmission device, and the structure can be further simplified.

In the present invention, it is preferable that an input rotor is disposed on the input shaft, power from the engine is transmitted to the input rotor, and an output rotor that transmits power to the threshing device is located on the input shaft and between the input rotor and the transmission case.

According to this configuration, the input rotor and the output rotor can be disposed in a relatively close state. Wherein the input rotary body is used for inputting power from an engine to the running device, and the output rotary body is used for inputting power to the threshing device. Therefore, the engine, the threshing device, and the transmission are disposed at positions close to each other, and the transmission structure of the engine, the threshing device, and the transmission can be miniaturized.

In the present invention, it is preferable that an output rotating body that transmits power to the threshing device side is provided on the input shaft, the combine harvester includes a threshing power transmission unit that transmits power from the output rotating body to a threshing-side rotating body provided on the threshing device side via an endless rotating belt, and the threshing power transmission unit is located between the engine and the transmission case in a direction along an axial center of the output rotating body.

According to this configuration, the power transmission structure for transmitting power from the input shaft to the threshing device can be arranged in a small size in the narrow lateral space between the engine and the transmission case by using the threshing power transmission unit that transmits power from the output rotor to the threshing-side rotor on the threshing device side via the endless rotating belt.

In the present invention, it is preferable that an input rotating body to which power from the engine is transmitted is disposed on the input shaft, the combine harvester includes an engine power transmission unit that transmits driving force from an engine output rotating body disposed on the engine to the input rotating body via an endless rotating belt, and the engine power transmission unit is located between the engine and the transmission in a direction along an axial center of the input shaft.

According to this configuration, the engine power transmission unit that transmits power from the engine output rotating body to the input rotating body via the endless rotating belt is adopted, whereby the power transmission structure that transmits power from the engine output shaft to the transmission case can be arranged in a small size in the narrow lateral space between the engine and the transmission case.

In the present invention, it is preferable that an output rotor and an input rotor are disposed at adjacent positions on the input shaft, the output rotor transmits power to the threshing device side, and the power from the engine is transmitted to the input rotor.

According to this configuration, the output rotating body that transmits power to the threshing device side and the input rotating body that transmits power from the engine are positioned adjacent to each other on the input shaft of the transmission, and can be disposed in a state of being close to each other.

In the present invention, it is preferable that the output rotating body and the input rotating body are constituted by a series of pulleys disposed on the input shaft.

According to this configuration, the output rotating body that transmits power to the threshing device side and the input rotating body that transmits power to the transmission side are constituted by a series of pulleys provided on the input shaft of the transmission, and therefore can be easily arranged in a state of being closer to each other. Therefore, the transmission structure for transmitting power from the engine to the threshing device via the transmission can be further downsized.

In the present invention, it is preferable to have: an engine power transmission unit that transmits power from the engine to an input rotary member provided on the input shaft; and a power transmission unit for threshing, which transmits power transmitted to the input shaft from an output rotating body provided on the input shaft to the threshing device side via an endless rotating belt, and which is positioned so as to overlap with the engine power transmission unit when viewed in the axial direction of the output shaft of the engine.

According to this configuration, the threshing power transmission unit and the engine power transmission unit are provided so as to overlap each other when viewed in the axial direction of the output shaft of the engine, whereby the space for disposing the threshing power transmission unit and the engine power transmission unit can be reduced in the front-rear direction and the vertical direction.

That is, when the threshing power transmission unit and the engine power transmission unit are disposed in a state of being directed from the engine output shaft toward the opposite side in the front-rear direction, the arrangement space for the threshing power transmission unit and the engine power transmission unit becomes long in the front-rear direction. Further, when the threshing power transmission unit and the engine power transmission unit are arranged in a vertically offset state, the arrangement space for the threshing power transmission unit and the engine power transmission unit occupies a large width in the vertical direction, and it is necessary to secure a large arrangement space.

According to this configuration, the threshing power transmission unit and the engine power transmission unit overlap each other when viewed in the axial direction of the output shaft of the engine, and therefore the installation space can be reduced in size.

In the present invention, it is preferable that the endless rotating belt of the power transmission unit for threshing is wound around the output rotating body and a threshing-side rotating body, and the threshing-side rotating body is disposed at a position overlapping with the engine when viewed in the axial direction of the output shaft of the engine.

According to this configuration, the endless rotating belt of the power transmission unit for threshing is wound around the output rotating body provided on the input shaft of the transmission case and the threshing-side rotating body disposed at a position overlapping the engine when viewed in the axial direction of the output shaft of the engine, and therefore the endless rotating belt of the power transmission unit for threshing can be disposed between the engine and the threshing-side rotating body which are positioned close to each other in the front-rear direction without any problem.

In the present invention, it is preferable that the threshing-side rotating body is disposed at a position overlapping an engine output rotating body provided in the engine when viewed in an axial direction of an output shaft of the engine.

According to this configuration, the threshing-side rotating body is disposed at a position overlapping the engine output rotating body when viewed in the axial direction of the output shaft of the engine, and therefore, even if the threshing device and the engine are further close to each other in the front-rear direction, power transmission can be performed without any problem.

In the present invention, it is preferable that the threshing device is disposed on a lateral side of the engine, and the transmission is disposed on a front side of the engine.

According to this configuration, the power transmission to the threshing device disposed laterally to the engine is performed by the input shaft of the transmission disposed in front of the engine and the threshing device, and therefore, the power transmission from the engine to the threshing device disposed laterally can be performed without any trouble.

Further, the power transmission structure for transmitting power from the engine to the threshing device can be disposed by effectively utilizing the space existing on the front side of the engine and the threshing device, and therefore, the power transmission structure can be disposed without reducing the space for various transmission systems and devices such as the rear side of the threshing device where the labyrinth is provided.

In the present invention, it is preferable that the threshing-side rotating body is attached to a windmill shaft of the threshing device.

According to this configuration, the windmill shaft of the threshing device can be used to mount the threshing-side rotating body, and therefore, the risk of an additional input transmission shaft being provided, which increases the number of components, can be avoided.

In the present invention, it is preferable that the power of the engine is transmitted to a harvesting unit for harvesting the object via the windmill shaft.

According to this configuration, the windmill shaft can be used as a power transmission member for transmitting power to the harvesting unit, and the structure can be simplified by making the members common.

In the present invention, it is preferable that the input shaft includes: an input rotating body to which power from the engine is transmitted; and an output rotating body that transmits power to the threshing device side, and transmits power to the threshing device side, the power being decelerated by a circumferential speed difference between the input rotating body and the output rotating body.

According to this configuration, the power for decelerating the speed of the input rotating body and the output rotating body is transmitted to the threshing device side by the circumferential speed difference between the input rotating body and the output rotating body on the input shaft of the transmission. Therefore, between the input rotating body and the threshing-side rotating body of the threshing device, the diameter of the threshing-side rotating body can be set small without increasing the degree of deceleration by further increasing the difference in diameter between the threshing-side rotating body and the output rotating body.

In the present invention, it is preferable that a flywheel is attached to an output shaft of the engine, an output pulley is attached to the flywheel, the output pulley has a bottomed cylindrical shape and is attached to the flywheel with a bottom portion thereof in contact with the flywheel, and the bottom portion on an inner peripheral side of the output pulley has an attachment portion for attachment to the flywheel.

According to this configuration, the diameter of the output pulley attached to the flywheel can be increased. Therefore, the free space can be effectively utilized, and a large power can be transmitted through the endless rotating belt wound around the output pulley. Further, since the bottom portion on the inner peripheral side of the output pulley has a mounting portion for mounting to the flywheel, the endless rotating belt wound around the outer peripheral side of the output pulley does not become an obstacle when the mounting portion is operated.

In the present invention, it is preferable that the pulley groove of the output pulley is formed in an outer peripheral portion of the mounting portion.

According to this configuration, since the pulley groove of the output pulley is provided at the outer peripheral portion of the mounting portion for mounting to the flywheel, the output pulley can be brought closer to the flywheel side. This can suppress the amount of protrusion of the output pulley away from the engine, and can reduce the load due to the tightening load of the transmission belt mounted in the pulley groove.

The "solution to problem 3" corresponding to the "problem to be solved by the invention 3" described above is as follows.

Specifically, the combine harvester of the present invention includes: a feeder for carrying backward the crops harvested by the harvesting part in front of the body; and a threshing device that performs a threshing process on the crop transported by the feeder, the threshing device including: a threshing chamber for threshing the crops by a rotary threshing cylinder; and a separation processing unit located below the threshing chamber and configured to separate the threshing processed material, the combine harvester including: an intermediate shaft that penetrates the interior of the threshing device and transmits power from an engine to the threshing device on the side opposite to the engine; a relay shaft distinct from the intermediate shaft; a relay transmission mechanism that transmits power from a driving rotating body attached to the intermediate shaft to a driven rotating body attached to the relay shaft; and a distribution transmission mechanism that distributes power from the driven rotating body to the threshing cylinder and the feeder.

According to the present invention, the intermediate shaft transmits the power from the engine to the opposite side of the engine to the threshing device, and the intermediate shaft penetrates the inside of the threshing device, so that it is not necessary to provide a special space for placing the intermediate shaft on the outside of the threshing device, and the arrangement of the threshing device is not limited.

The combine harvester is different from a relay shaft of the middle shaft, power is transmitted to the relay shaft through the relay transmission mechanism after being transmitted to the opposite side of the engine through the middle shaft, and then is distributed and provided for the threshing cylinder and the feeder from the relay shaft through the distribution transmission mechanism. That is, the power is not directly transmitted from the intermediate shaft to each device such as the threshing cylinder and the feeder, but is transmitted via the intermediate shaft. Further, power can be directly transmitted from the intermediate shaft.

As a result, for example, when power is transmitted from the intermediate shaft to the high-speed drive device and power is transmitted from the relay shaft to the low-speed drive device such as the threshing cylinder or the feeder, the low-speed drive device does not need to be provided with a structure for largely changing the speed such as a large rotating body. And, besides the above-mentioned intermediate shaft, it is not necessary to provide another intermediate shaft, thereby making the transmission structure simple.

Therefore, the transmission structure is simple, the machine body configuration structure is reasonable, and the redundant arrangement space is reduced.

In the present invention, it is preferable that the sorting processing unit includes a processed object conveying mechanism that conveys the sorted processed object, and the distribution transmission mechanism distributes and supplies power from the driven transmission member to the processed object conveying mechanism.

According to this configuration, the power is distributed and supplied from the relay shaft to the processed object conveying mechanism by the distribution transmission mechanism. The processed object conveying mechanism conveys the sorted processed objects, namely secondary objects such as separated grains and particles with branches. Since power is transmitted via the relay shaft, a configuration in which speed is largely changed can be omitted.

Therefore, the processed object conveying mechanism can be easily moved by the operator, and the processed object can be easily moved by the operator.

In the present invention, it is preferable that the sorting processing unit includes a wind turbine that supplies sorting wind to the threshing processed object, and the intermediate shaft also serves as a rotation shaft of the wind turbine.

According to this configuration, since the rotating shaft of the wind turbine also serves as the intermediate shaft, the transmission structure can be simplified by the universal use of the shaft, as compared with the case where a dedicated intermediate shaft is provided.

Since the separation wind is blown by rotationally driving the wind turbine, the wind turbine needs to be rotationally driven at a high speed, and since the rotation shaft of the wind turbine also serves as an intermediate shaft, it is not necessary to provide a large-sized rotation body for increasing the speed, and the wind turbine can be driven at a high speed by the power transmitted to the intermediate shaft.

In the present invention, it is preferable to have: a post-treatment device for post-treating the effluent after the external threshing treatment discharged from the threshing chamber; and a post-processing transmission mechanism that transmits power from a post-processing rotating body attached to the intermediate shaft to the post-processing device without passing through the intermediate shaft.

According to this configuration, the power is transmitted to the aftertreatment device through the aftertreatment transmission mechanism without the intermediary of the relay shaft. The post-treatment device is a device for post-treating the effluent after the threshing process, and has a function of, for example, chopping the discharged grass as the effluent. In order to reliably perform the post-processing such as shredding, the post-processing apparatus needs to be driven at a high speed.

Here, by directly transmitting the power from the intermediate shaft without passing through the relay shaft, the post-processing device can be driven at a high speed, and the processing of the post-processing device can be performed satisfactorily.

In the present invention, it is preferable that the post-processing rotating body is provided on the intermediate shaft so as to be positioned further inward than the driving rotating body.

The post-processing apparatus performs post-processing such as shredding of grass, and when the post-processing apparatus causes a problem such as clogging of a processed object, a driving load may increase for a while.

Here, according to this configuration, the post-processing rotating body is located on the inner side of the machine body with respect to the intermediate shaft than the driving rotating body, in other words, located near the portion where the intermediate shaft is supported by the bearing portion. As a result, even if the post-processing rotating body vibrates due to load fluctuations or the like, the swing of the intermediate shaft can be suppressed, and the driving operation can be easily stabilized as much as possible.

In the present invention, it is preferable that the driven rotary body is of a multiple-connected type, and includes, in a continuously connected state: an input rotating body to which power from the intermediate shaft is input; and a plurality of output rotating bodies for distributing and supplying power, wherein the plurality of output rotating bodies are distributed on both sides of the rotation axis direction of the input rotating body.

According to this configuration, the relay shaft includes a plurality of output rotating bodies distributed on both sides in the rotation axial center direction of the input rotating body. As a result, since the driving force in the opposite direction to the direction applied to the relay shaft acts on both sides in the axial direction of the input rotary body, the relay shaft is less likely to be deformed, and the durability is excellent.

In the present invention, it is preferable that an output rotating body for a threshing cylinder, which transmits power to the threshing cylinder, among the plurality of output rotating bodies is located on the outer side of the machine body than the input rotating body.

Since the threshing cylinder is rotationally driven in the threshing chamber to perform threshing processing on the threshed processing objects, the driving load is large, and when the processing objects are entangled and stacked, the rotation of the threshing cylinder may be stopped. As a result, the transmission mechanism of the threshing cylinder is frequently subjected to maintenance work.

According to this configuration, since the output rotating body for the threshing cylinder is located further to the outside of the machine body than the input rotating body, maintenance work of the transmission mechanism of the threshing cylinder can be easily performed from the outside of the machine body.

In the present invention, it is preferable that the output rotating body for the threshing cylinder is detachably attached to the relay shaft.

According to this configuration, since the output rotating body for the threshing cylinder is freely attached and detached, the output rotation speed of the threshing cylinder can be changed by merely replacing the output rotating body for the threshing cylinder with another output rotating body having a different diameter without complicating the configuration by providing a special transmission such as a gear type transmission mechanism.

Therefore, when the harvesting target crop is different, the output rotation speed of the threshing cylinder can be adjusted to a speed suitable for the crop by only replacing the output rotating body.

In the present invention, it is preferable that the feeder output rotating body, which transmits power to the feeder, among the plurality of output rotating bodies is located on an inner side of the machine body with respect to the input rotating body.

According to this configuration, the low-speed power transmitted via the relay shaft is transmitted from the feeder output rotating body to the feeder, and the crop harvested by the harvesting unit in the front of the machine body is favorably conveyed to the rear threshing device.

Since the required rotational speed of the feeder does not vary depending on the type of crop, the feeder output rotating body can be disposed on the inside of the machine body of the relay shaft with respect to the input rotating body.

In the present invention, it is preferable that the processed object conveying output rotating body, which transmits power to the processed object conveying mechanism, among the plurality of output rotating bodies is located on the inner side of the machine body with respect to the input rotating body.

According to this configuration, the low-speed power transmitted via the relay shaft is transmitted from the output rotary body for conveying the processed object to the processed object conveying mechanism, and the sorted processed object, i.e., the secondary objects such as the separated grains and the branched particles, is favorably conveyed.

Since the rotational speed required for the processed object carrying mechanism does not vary depending on the type of crop, the processed object carrying output rotating body can be disposed at a position closer to the inside of the machine body than the input rotating body of the relay shaft.

In the present invention, it is preferable that the threshing cylinder rotates around a rotation axis along the front-rear direction of the machine body.

According to this configuration, the threshing cylinder rotates around the rotation axis in the front-rear direction of the machine body, thereby performing threshing processing on the threshing processed object. According to the above configuration, the crop supplied from the harvesting unit at the front of the machine body is threshed along a long treatment path along the outer periphery of the threshing cylinder, so that the threshing treatment can be performed well.

In the present invention, it is preferable that the intermediate shaft passes through a lower portion of the threshing cylinder.

According to the structure, the middle shaft penetrates through the interior of the threshing device below the threshing cylinder. The intermediate shaft can be effectively disposed in the space below the threshing cylinder without interfering with the rotational driving of the threshing cylinder.

In the present invention, it is preferable that the power of the engine is transmitted to the body travel transmission mechanism and then transmitted from the body travel transmission mechanism to the intermediate shaft.

According to this configuration, the power of the engine is transmitted not directly to the intermediate shaft but to the transmission mechanism for engine body traveling and then transmitted from the transmission mechanism for engine body traveling to the intermediate shaft.

Specifically, in order to form a reasonable engine body arrangement structure with a small extra installation space, for example, when an intermediate shaft is disposed on the lateral side of an output shaft of an engine, if power of the engine is directly transmitted to the intermediate shaft, an output rotating body of the engine and an input rotating body of the intermediate shaft are laterally aligned, and a problem may arise in that a toroidal rotating body cannot be wound.

However, even with the above arrangement, if the power of the engine is transmitted to the body travel transmission mechanism and then transmitted from the body travel transmission mechanism to the intermediate shaft, the power can be transmitted.

Therefore, according to this configuration, by improving the transmission structure, a reasonable body arrangement structure with less extra installation space can be realized.

In the present invention, it is preferable that the power of the engine is transmitted to a travel input shaft of the machine body travel transmission mechanism, and then transmitted from the travel input shaft to the intermediate shaft.

According to this configuration, since the power is branched and transmitted from the traveling input shaft to the body traveling transmission mechanism and the intermediate shaft, the body traveling transmission mechanism does not need to be structurally improved significantly, and the structural improvement can be easily performed.

In the present invention, it is preferable that the threshing device is provided with a grass discharge processing device at the rear thereof, and the transmission mechanism for transmitting power to the input rotating body of the grass discharge processing device is provided with a plurality of belts.

According to this configuration, since the transmission of the driving force to the input rotary body of the grass discharge processing device is performed by the plurality of belts, the tension of the transmission mechanism is distributed to the respective belts, and the service life of the respective belts can be extended.

Drawings

Fig. 1 is a diagram showing a first embodiment, which is a right side view of a combine harvester.

Fig. 2 is a view showing the first embodiment, which is an overall plan view of the combine harvester.

Fig. 3 is a view showing the first embodiment, and is a plan view showing a state of the combine harvester after the grain tank is removed.

Fig. 4 is a diagram illustrating the first embodiment, and is a side view illustrating a power transmission structure for transmitting power from an engine to a radiator cooling fan.

Fig. 5 is a diagram illustrating the first embodiment, and is a plan view illustrating a power transmission structure for transmitting power from an engine to a radiator cooling fan.

Fig. 6 is a diagram showing the first embodiment, and is a side view showing a forward rotation transmission state of the forward/reverse rotation selection mechanism.

Fig. 7 is a diagram showing the first embodiment, and is a side view showing a reverse transmission state of the forward/reverse selector mechanism.

Fig. 8 is a diagram showing the first embodiment, and is an enlarged side view showing the forward/reverse rotation selecting mechanism.

Fig. 9 (a) is a diagram showing the first embodiment, and is a plan view showing the forward/reverse rotation selecting mechanism.

Fig. 9 (b) is a view showing the first embodiment, and is a partially enlarged view showing the forward/reverse selecting mechanism.

Fig. 10 is a diagram showing the first embodiment, and is a rear view showing the forward/reverse selecting mechanism.

Fig. 11 is a view showing the first embodiment, and is an exploded perspective view showing an attachment structure of the forward/reverse selector mechanism.

Fig. 12 is a diagram showing the first embodiment, and is a schematic diagram showing a power transmission system.

Fig. 13 is a view showing the second embodiment, which is a right side view of the combine harvester.

Fig. 14 is a view showing the second embodiment, which is an overall plan view of the combine harvester.

Fig. 15 is a view showing the second embodiment, and is a plan view showing a state of the combine harvester after the grain tank is removed.

Fig. 16 is a diagram showing the second embodiment, and is a side view showing a power transmission structure among an engine, a transmission, and a threshing device.

Fig. 17 is a view showing the second embodiment, and is a front view showing a power transmission structure among an engine, a transmission, and a threshing device.

Fig. 18 is a diagram showing the second embodiment, and is a plan view showing a power transmission structure among an engine, a transmission, and a threshing device.

Fig. 19 is an exploded perspective view showing the second embodiment, showing the structure of a power transmission portion for transmitting power from an engine to a threshing device via a transmission.

Fig. 20 is a diagram showing the second embodiment, and is a schematic diagram showing a power transmission system.

Fig. 21 is a view showing the third embodiment, which is an overall left side view of a general-type combine harvester.

Fig. 22 is a view showing a third embodiment, which is an overall plan view of a conventional combine harvester.

Fig. 23 is a view showing a third embodiment, and is a vertical sectional side view of a threshing device.

Fig. 24 is a diagram showing a third embodiment, which is a side view of a threshing chamber.

Fig. 25 is a view showing the third embodiment, and is a vertical sectional front view of a threshing chamber.

Fig. 26 is a view showing the third embodiment, and is a vertical sectional front view of the threshing device in a state where the top plate and the left side plate are opened.

Fig. 27 is a view showing the third embodiment, and is a perspective view of a left side plate.

Fig. 28 (a) is a view showing the third embodiment, and is a side view of the threshing cylinder.

FIG. 28 (b) is a drawing showing the third embodiment, and is a sectional view taken along the line XXXVIIb-XXXVIIb.

FIG. 28 (c) is a drawing showing the third embodiment, and is a line sectional view taken from XXXVIc to XXXVIc.

Fig. 28 (d) is a view showing the third embodiment, and is a sectional view of the support plate.

FIG. 28 (e) is a drawing showing the third embodiment, and is a sectional view taken along the line XXXVIe-XXXVIe.

Fig. 29 is a diagram showing the third embodiment, and is a diagram showing a connection state of the receiving net.

Fig. 30 is a view showing the third embodiment, which is a sectional view when the receiving net is removed.

Fig. 31 is a view showing a third embodiment, which is a plan view of a threshing device.

Fig. 32 (a) is a view showing the third embodiment, and is a vertical cross-sectional front view showing a state in which the reinforcing plate is attached.

Fig. 32 (b) is a view showing the third embodiment, and is a partially enlarged view of fig. 32 (a).

Fig. 33 is a diagram showing the third embodiment, and is a side view of the sorting processing section.

Fig. 34 (a) is a diagram showing the third embodiment, and is a side view of the movement guide unit.

Fig. 34 (b) is a diagram showing the third embodiment, and is a plan view of the movement guide unit.

Fig. 34 (c) is a view showing the third embodiment, and is a vertical sectional front view of the swing sorting apparatus guided by the guide rail.

Fig. 34 (d) is a diagram showing the third embodiment, and is a vertical sectional front view of the swing sorting apparatus supported by the movement guide.

Fig. 35 (a) is a diagram showing the third embodiment, and is a side view of the swing drive unit.

Fig. 35 (b) is a diagram showing the third embodiment, and is a plan view of the swing drive unit.

Fig. 36 is a view showing the third embodiment, and is a perspective view showing a state where the grain sieve is attached and detached.

Fig. 37 is a view showing a third embodiment, and is a partial vertical cross-sectional side view of the swing sorting apparatus.

Fig. 38 is a diagram showing a third embodiment, which is a side view of a baffle.

Fig. 39 is a diagram showing the third embodiment, which is a right side view of a general type combine harvester.

Fig. 40 is a diagram showing a third embodiment, and is a side view of the first grain transporting device.

Fig. 41 (a) is a view showing the third embodiment, and is a vertical cross-sectional side view showing a lower part of the first grain transporting device.

Fig. 41 (b) is a view showing the third embodiment, and is a vertical front view showing a lower part of the first grain transporting device.

Fig. 42 is a diagram showing the third embodiment, which is a rear view of the first grain transporting device.

Fig. 43 is a diagram showing the third embodiment, and is a partially cut-away rear view of a conveying end portion of the first grain conveying device.

Fig. 44 (a) is a view showing the third embodiment, and is a vertical cross-sectional side view of a conveying terminal part of the first grain conveying device.

Fig. 44 (b) is a diagram showing the third embodiment, and is a longitudinal rear view of the conveying terminal part of the first grain conveying device.

Fig. 45 is a view showing the third embodiment, and is a perspective view of the upper cover.

Fig. 46 is a diagram showing the third embodiment, which is a rear view of the second grain transporting device.

Fig. 47 (a) is a diagram showing a third embodiment, which is a side view of a secondary product returning apparatus.

Fig. 47 (b) is a view showing the third embodiment, and is a sectional view of the chain case.

Fig. 48 is a diagram showing the third embodiment, which is a cut-away rear view showing a developed state of the secondary product back feeding device.

Fig. 49 is a diagram showing a third embodiment, which is a cross sectional plan view of a discharge portion of the secondary product back feeding device.

Fig. 50 (a) is a diagram showing the third embodiment, and is a vertical sectional front view of the wind turbine.

Fig. 50 (b) is a diagram showing the third embodiment, and is a left side view of the wind turbine.

Fig. 50 (c) is a diagram showing the third embodiment, and is a right side view of the wind turbine.

Fig. 51 is a view showing the third embodiment, and is a front view showing a supporting structure of an opening degree adjustment plate.

Fig. 52 is a diagram showing the third embodiment, and is a rear view showing a support structure of the opening degree adjustment plate.

Fig. 53 (a) is a diagram illustrating the third embodiment, and is a plan view illustrating a supporting structure of the switch member.

Fig. 53 (b) is a diagram showing the third embodiment, and is a side view showing a supporting structure of the opening and closing member.

Fig. 54 is a diagram showing a third embodiment, which is a transmission system diagram.

Fig. 55 (a) is a diagram showing the third embodiment, and is a vertical sectional front view of the relay transmission mechanism.

Fig. 55 (b) is a diagram showing the third embodiment, and is a side view showing a transmission structure of the threshing device.

Fig. 56 is a view showing the fourth embodiment, which is a right side view of the combine harvester.

Fig. 57 is a view showing the fourth embodiment, which is an overall plan view of the combine harvester.

Fig. 58 is a diagram showing the fourth embodiment, and is a side view showing a power transmission structure among an engine, a transmission, and a threshing device.

Fig. 59 is a diagram showing the fourth embodiment, and is a plan view showing a power transmission structure among the engine, the transmission, and the threshing device.

Fig. 60 is a diagram showing the fourth embodiment, and is a side view showing a power transmission structure for transmitting power from the engine to the radiator cooling fan.

Fig. 61 is a diagram illustrating the fourth embodiment, and is a plan view illustrating a power transmission structure for transmitting power from an engine to a radiator cooling fan.

Fig. 62 is a diagram showing the fourth embodiment, and is a rear view showing an air blowing mechanism.

Fig. 63 is a diagram showing the fourth embodiment, and is a schematic diagram showing a power transmission system.

Fig. 64 is a diagram showing the fourth embodiment, and is a side view showing an intake box portion of a radiator.

Fig. 65 is a diagram showing the fourth embodiment, and is a rear view showing an intake box portion of a radiator.

Fig. 66 (a) is a diagram showing the fourth embodiment, and is a plan view showing an intake box portion of a radiator.

Fig. 66 (b) is a view showing the fourth embodiment, and is a perspective view showing a portion connecting the upper and lower sides of the intake box portion of the radiator.

Fig. 67 is a view showing the fourth embodiment, and is an exploded perspective view showing a radiator, an intake box, and a radiator cooling fan.

Fig. 68 is a view showing the fourth embodiment, and is a plan view showing a horizontal cross section of the forward/reverse selector mechanism.

Fig. 69 is a diagram showing the fourth embodiment, and is a rear view showing a vertical cross section of the forward/reverse rotation selecting mechanism.

Fig. 70 is a view showing the fourth embodiment, and is an exploded perspective view showing an attachment structure of the forward/reverse rotation selecting mechanism.

Fig. 71 is a diagram showing the fourth embodiment, and is a side view showing a forward rotation transmission state of the forward/reverse rotation selection mechanism.

Fig. 72 is a diagram showing the fourth embodiment, and is a side view showing a reverse gear state of the forward/reverse selector mechanism.

Fig. 73 is a diagram showing the fourth embodiment, and is an enlarged side view showing the forward/reverse rotation selecting mechanism.

FIG. 74 is a view showing a fourth embodiment, which is a sectional view taken along the line LXXIV-LXXIV in FIG. 71.

Fig. 75 is a view showing the fourth embodiment, and is a side view showing a tape stopper.

Fig. 76 is a view showing the fourth embodiment, and is a plan view showing a tape stopper.

Fig. 77 is a diagram showing the fourth embodiment, and is an explanatory diagram showing a state in which the operation element is mounted inside the cab.

Fig. 78 is a right side view of a combine harvester of other embodiments of the fourth embodiment.

Detailed Description

(first embodiment)

A first embodiment of the present invention will be explained below with reference to the description of the drawings.

(Overall Structure)

Fig. 1 to 5 show a whole-feed type (normal type) combine as an example of the combine of the present invention. Fig. 1 is a right side view showing the entire body, and fig. 2 is a plan view showing the entire body. Fig. 3 is a plan view showing a state where the grain tank 5 is removed and the threshing device 4 and the like are exposed.

As shown in these figures, the above-described all-feed combine harvester includes a traveling device 2, and the traveling device 2 includes a pair of left and right front wheels 2F, 2F (corresponding to a front traveling device) and a pair of left and right rear wheels 2R, 2R (corresponding to a rear traveling device) located below a vehicle body frame 1.

The traveling machine body is configured as follows. That is, a cab 15 (corresponding to a cab) is provided at the front of the vehicle body frame 1, a threshing device 4 and a grain tank 5 are provided at the rear side of the cab 15, and a grass discharge processing device 16 is provided at the rearmost part of the vehicle body frame 1. A harvesting unit 17 is provided at the front portion of the vehicle body frame 1, and the harvesting unit 17 is moved up and down about a horizontal axis (not shown) with respect to the vehicle body frame 1.

An engine 3 is mounted on a front portion of the body frame 1 and on a lateral side portion of the threshing device 4, and a radiator 7 is disposed at a rear position apart from the engine 3. A fuel tank 12 is mounted on the side opposite to the engine 3 with the threshing device 4 therebetween. In addition to the traveling device 2, the power of the engine 3 is transmitted to the threshing device 4, the reaping processing device 17, a radiator cooling fan 70 that cools the radiator 7, and the like.

In the front wheel 2F of the running gear 2, the power transmitted via the front wheel drive shaft 24 is transmitted to the front wheel 2F via the reduction gear box 25 and the front axle 2a, wherein the front wheel drive shaft 24 is mounted on the front portion of the vehicle body frame 1 and extends from the transmission case 20 to the left and right, the reduction gear box 25 enters a recessed portion formed on a surface facing the inside of the machine body of the front wheel 2F, and the front axle 2a is supported by the reduction gear box 25.

Thus, the front wheels 2F are mounted, the power of the engine 3 is transmitted to the front wheels 2F via the front axle 2a, and the front wheels 2F are rotationally driven about the horizontal transverse axis x1A of the front axle 2 a. The front wheels 2F are non-steered wheels formed of tires having a larger width and diameter in the right-left direction than the rear wheels 2R.

As shown in fig. 2 and 3, the rear wheels 2R are provided at the rear portion of the vehicle body frame 1 on both left and right end sides of a rear wheel support frame (not shown) attached so as to be swingable left and right about a front-rear direction axis (not shown), and the rear wheels 2R are constituted by steered wheels and have a rear axle 2b that is capable of being steered about a vertically swinging axis. The rear wheel 2R is formed of a tire wheel having a smaller width and diameter in the right-left direction than the front wheel 2F, and the rear wheel 2R rotates about a horizontal lateral axis x2A of the rear axle 2 b.

(reaping apparatus)

As shown in fig. 1 to 3, a harvesting processing device 17 is provided on the front side of the threshing device 4 mounted on the vehicle body frame 1, and the harvesting processing device 17 is moved up and down about a horizontal axis along the left-right direction.

The harvesting processing apparatus 17 includes: a feeder 17A for supplying harvested crops such as straw to the threshing device 4; raking the reel 17B, and raking the spike head side of crops such as planted standing straws and the like; a harvesting device 17C for cutting off the root side of the plant; and a horizontal transfer screw 17D for gathering the harvested crops toward the center in the harvesting direction. The harvesting unit 17 harvests the crop and feeds it to the feeder 17A, which feeds it to the threshing unit 4.

Here, although not shown, the feeder 17A is provided with an endless belt-like conveyance member that rotates in the front-rear direction inside a square cylindrical casing, and the feeder 17A conveys the delivered harvested crop to the rear upper side. The crop conveying direction of the feeder 17A is the front-rear direction along the threshing cylinder rotation axis p0A (see fig. 3) of the threshing cylinder 40 in the threshing device 4, and the raking reel 17B, the harvesting device 17C, and the lateral transfer screw 17D can also be lifted and lowered in accordance with the lifting and lowering operation of the feeder 17A.

(threshing device)

As described above, the threshing device 4 is disposed on the vehicle body frame 1 such that the threshing cylinder rotation axis p0A is along the front-rear direction. The threshing device 4 is disposed in the front-rear direction at a front-rear direction interval between the front wheels 2F and the rear wheels 2R, and is disposed in the left-right direction at a left-right interval between the front wheels 2F and the rear wheels 2R.

As shown in fig. 1, the lower surface of the threshing device 4 is slightly lower than the front axle 2a of the front wheels 2F as non-steered wheels and slightly higher than the rear axle 2b of the rear wheels 2R as steered wheels. In other words, the lower surface of the threshing device 4 is disposed at a height position substantially equal to the height position of the front axle 2a of the front wheel 2F as a non-steered wheel or the height position of the rear axle 2b of the rear wheel 2R as a steered wheel.

The threshing device 4 arranged as described above has the threshing cylinder rotation axis p0A of the threshing device 4 offset to the left with respect to the center line CLA in the left-right direction of the machine body. Since the center line of the threshing device 4 in the left-right direction is located at the same position as the rotation axis p0A of the threshing cylinder 40 arranged inside, the whole threshing device 4 is arranged at a position shifted to the left side with respect to the center line CLA in the left-right direction of the machine body.

The feeder 17A for feeding harvested crops to the threshing device 4 is disposed on the left side with respect to the center line CLA in the left-right direction of the machine body, as in the threshing device 4. As shown in fig. 3, the feeder 17A partially overlaps the transmission case 20 on the right side with respect to the center line CLA in the left-right direction of the machine body in plan view.

The grass discharge processing device 16 is integrally installed at the rear part of the threshing device 4, and the grass discharge after the threshing processing is cut off and discharged out of the machine body.

The threshing device 4 is formed in a rectangular box shape that is long in the front-rear direction of the machine body, and has a wind turbine 41 at its front end (see fig. 12). A windmill shaft 41a having a wind feeding blade of the windmill 41 extends outward in the right lateral direction of the threshing box 4A, and a threshing input pulley 41b (corresponding to a threshing-side rotating body) for inputting power transmitted from the engine 3 to the threshing device 4 is attached to an extended portion of the windmill shaft 41 a.

The threshing device 4 is not provided with a sub-wind turbine, and only the wind turbine 41 is used to blow air to the selected parts.

A threshing cylinder 40 is provided inside the threshing device 4 so as to be rotationally driven around a cylinder shaft 40a in the front-rear direction, and the threshing cylinder 40 is used for threshing the harvested crop fed from the feeder 17A side. The threshing cylinder 40 is provided with a sorting device 42 and the like, and the sorting device 42 performs swing sorting of the harvested crops threshed by the threshing cylinder 40 by the air blowing operation of the wind turbine 41.

(grain box)

As shown in fig. 1 to 3, the grain tank 5 is provided on the rear side of the cab 15 so as to straddle the tank support base 13 on the right lateral side of the vehicle body frame 1 and the threshing device 4 on the left lateral side of the vehicle body frame 1.

The grain tank 5 is provided with a tank-shaped tank body 51 on the upper side of a bottom frame 50 formed by assembling various steel materials such as square pipes into a grid shape, and the tank body 51 has a width in the left-right direction that extends over substantially the entire width in the left-right direction of the machine body.

These bottom frames 50 and the box main body 51 are integrally coupled, and are supported swingably about a swing axis center z2A in the front-rear direction by a swing support shaft 52 provided at an upper end portion of the box support base 13.

As shown in fig. 1, 3, and 4, the box support base 13 is provided on the body frame 1 at a right lateral side portion of the threshing device 4 so as to be positioned between the front wheels 2F and the rear wheels 2R. The box support table 13 has an outer post 13A and an inner post 13B, the outer post 13A being disposed on a side away from the threshing device 4, and the inner post 13B being disposed on a side closer to the threshing device 4 than the outer post 13A. The lower ends of the outer pillar 13A and the inner pillar 13B are fixed to the vehicle body frame 1, and the upper ends of the outer pillar 13A and the inner pillar 13B are connected to the upper frame 13C. In the upper frame 13C, an end portion of the grain tank 5 corresponding to the grain discharge port 5A on one end side in the left-right direction is connected and supported so as to be swingable in an undulating manner about a swing axis z2A in the front-rear direction.

A hydraulically driven swing cylinder 53 is mounted between the inner support 13B of the box support table 13 and the bottom frame 50 of the grain box 5. By the telescopic operation of the swing hydraulic cylinder 53, the grain tank 5 can be swung up and down about the swing axis z2A to change the posture between the storage posture in which the bottom surface of the tank main body 51 is horizontal or substantially horizontal and the discharge posture in which the bottom surface is raised toward the rising side.

As shown in fig. 4 and 5, a radiator 7 is disposed at the rear of the tank support base 13. The radiator 7 is supported at its front end side by a rearmost outer pillar 13A, is attached at its upper portion to an upper frame 13C, and is supported at its lower portion by a radiator support leg 1a erected on the vehicle body frame 1.

(driver's cabin)

As shown in fig. 1 and 3, the cab 15 is mounted on the cab frame 11 erected on the vehicle body frame 1.

Thus, the cab 15 is supported by the vehicle body frame 1 via the cab frame 11 at a position higher than the upper edge of the outer diameter of the front wheel 2F and further forward than the rear edge of the front wheel 2F.

A steering handle 15a for steering operation, an operator's seat 15b, and the like are provided in the cab 15, and the steering handle 15a steers the rear wheels 2R. The cab 15 is provided with various operation members for operation and work, meters, and the like.

(Power transmission structure)

Next, a power transmission structure for transmitting the power of the engine 3 to the thresher 4 and the radiator cooling fan 70 will be described.

As shown in fig. 3, 4, and 12, the engine 3 is disposed on the vehicle body frame 1 at a position on the right outer side with the crankshaft (not shown) along the left-right direction of the machine body.

On one end side (inside the machine body) in the left-right direction of the engine 3, a flywheel (not shown) and an output pulley 30 as an engine output rotating body are provided in a state where the axial direction is along the left-right direction of the machine body. On the other end side (outside of the machine body), an output shaft 31 projects, and a second output pulley 31a is attached to the output shaft 31. The power of the engine 3, which is the driving force of the radiator cooling fan 70, is output from the second output pulley 31a via a forward/reverse selector mechanism 6 described below.

The outer peripheral portion of the output pulley 30 has 3 belt grooves for winding a first belt 32 as an example of an endless rotating belt, and the first belt 32 is formed of 3 triangular belt groups.

A transmission 20 located on the front side of the engine 3 and on the inner side (left side in the left-right direction) of the engine 3 with respect to the engine 3 has an input shaft 21 projecting outward of the engine body (right side in the left-right direction), and an input/output pulley 22 as an input rotating body is integrally rotatably attached to the input shaft 21.

The input/output pulley 22 includes a first rotor portion 22A and a second rotor portion 22B, the first rotor portion 22A has 3 belt grooves for winding 3 v belts of a first drive belt 32, and the second rotor portion 22B has 2 belt grooves for winding a second drive belt 33 described below. The second rotating body portion 22B functions as an output rotating body for transmitting the engine power to the threshing device 4.

The first rotating body portion 22A and the second rotating body portion 22B are formed by integrally formed multiple pulleys, and the first rotating body portion 22A side has a large diameter and is located at a position closer to the outside of the machine body where the engine 3 is present, and the second rotating body portion 22B has a small diameter and is located at a position closer to the inside of the machine body where the threshing device 4 is present.

The transmission 20 is provided with a continuously variable transmission 23 on the side opposite to the side where the input/output pulley 22 is provided, and the continuously variable transmission 23 is used to shift the power input from the input shaft 21 and transmit the power to the running gear 2. The power shifted by the continuously variable transmission 23 is output from the front wheel drive shaft 24 via a transmission mechanism, not shown, provided inside the transmission case 20.

A second belt 33 is wound around the second rotating body portion 22B of the input/output pulley 22, and the second belt 33 is formed of 2 triangular belt groups as an example of an endless rotating belt.

The second belt 33 is wound around a threshing input pulley 41B provided on a windmill shaft 41a of the threshing device 4, and the engine power is input from the second rotating body portion 22B to the threshing device 4 via the second belt 33.

The threshing input pulley 41B on the windmill shaft 41a side is formed to have a diameter larger than the second rotating body portion 22B and the output pulley 30, and reduces the engine speed and transmits the reduced engine speed to the windmill shaft 41 a.

As shown in fig. 12, the engine power input to the windmill shaft 41a is distributed to a threshing cylinder side driving mechanism 43 for driving the threshing cylinder 40, a harvesting side driving mechanism 44 for transmitting the power to the harvesting processing device 17 including the feeder 17A, and a sorting side driving mechanism 45 for driving the sorting processing device 42 and the like.

The threshing cylinder side driving mechanism 43, the harvesting side driving mechanism 44, and the sorting side driving mechanism 45 each include a belt. Further, the power is also transmitted from the transmission downstream side of the sorting-side drive mechanism 45 to the grass discharge processing device 16 via the transmission belt 46.

The sorting-side drive mechanism 45 includes a belt 45a for transmitting power to the primary screw portion 42a and the raising device 47, a belt 45b for transmitting power to the secondary screw portion 42b and the secondary returning device 48, and a belt 45c for transmitting power to the swinging sorting plate 42 c.

As shown in fig. 4, 5, and 12, the power transmission to the radiator cooling fan 70 is performed via the third belt 34.

The third belt 34 includes an upstream belt 34A (corresponding to a power-side endless rotating belt) and a downstream belt 34B (corresponding to an endless rotating belt of a driving device), the upstream belt 34A is positioned on a side closer to the engine 3 with the relay shaft 35 interposed therebetween, and the downstream belt 34B is positioned on a side closer to the radiator cooling fan 70.

The upstream belt 34A is formed of a v-belt wound around a second output pulley 31a and a relay input pulley 35a (corresponding to the driving rotating body and also serving as the relay rotating body), the second output pulley 31a is provided on the output shaft 31, the output shaft 31 is located on the opposite side of the engine 3 from the output pulley 30, and the relay input pulley 35a is provided on an end portion (right end portion in the left-right direction) of the relay shaft 35 on the outside of the machine body.

The downstream-side transmission belt 34B is composed of a normal rotation transmission belt 36 (corresponding to an endless rotating belt of the normal rotation power transmission mechanism) and a reverse rotation transmission belt 37 (corresponding to an endless rotating belt of the reverse rotation power transmission mechanism), and the normal rotation transmission belt 36 and the reverse rotation transmission belt 37 are wound around a pair of relay output pulleys 35B and 35c (corresponding to the driving rotating body and also functioning as the relay rotating body) and a fan input pulley 72 (corresponding to the input rotating body) as a plurality of winding portions. The pair of relay output pulleys 35b and 35c are provided at an end portion (left end portion in the left-right direction) on the inner side of the machine body of the relay shaft 35. The fan input pulley 72 is supported by a support shaft 71 of the radiator cooling fan 70.

That is, the forward/reverse rotation selecting mechanism 6 selects either one of the forward rotation belt 36 and the reverse rotation belt 37 to be in a transmission state, and the selected one of the forward rotation belt 36 and the reverse rotation belt 37 functions as the downstream side belt 34B that transmits power to the fan input pulley 72.

As described above, the relay input pulley 35a, the relay output pulley 35B, and the relay output pulley 35c attached to the relay shaft 35 constitute a plurality of winding portions of the driving rotating body, and the driving rotating body and the downstream side transmission belt 34B constitute a driving device for driving the radiator cooling fan 70.

In this drive device, the upstream belt 34A on the power side endless rotating belt side is positioned on the outside of the machine body relative to the downstream belt 34B on the endless rotating belt side of the drive device. The upstream belt 34A is wound around the relay input pulley 35a, and the downstream belt 34B is wound around the relay output pulleys 35B and 35 c.

Since the lateral outer side of the engine 3 and the lateral outer side of the radiator 7 are covered with the side cover 9, the third belt 34 and the like as a power transmission structure for transmitting power from the engine 3 to the radiator cooling fan 70 are accommodated in the space s1A shielded from the outside.

As shown in fig. 4, this space s1A is formed by the intermediate portion in the front-rear direction of the third belt 34 being lifted upward by the relay shaft 35 when the third belt 34 is provided, the third belt 34 transmitting power from the output shaft 31 of the engine 3 positioned at the lower front to the radiator cooling fan 70 positioned at a slightly higher position and offset rearward.

This increases the capacity of the space below the third belt 34, and can be effectively used as a space for maintenance.

(Forward and reverse selection mechanism)

The forward/reverse rotation selecting mechanism 6 will be explained below.

The forward/reverse rotation selection mechanism 6 switches the rotation direction of the fan input pulley 72 to the forward rotation direction or the reverse rotation direction by transmitting the power of either one of the forward rotation belt 36 and the reverse rotation belt 37 to the fan input pulley 72 around which the forward rotation belt 36 and the reverse rotation belt 37 are wound, and by not transmitting the power of the other to the fan input pulley 72.

The forward rotation direction of the fan input pulley 72 is: the air blowing direction of the radiator cooling fan 70 is directed from the outer side to the inner side in the lateral direction of the body, and the radiator cooling fan 70 is directed to perform an air sucking action with respect to the radiator 7. The reverse direction is: the air blowing direction of the radiator cooling fan 70 is directed in the reverse direction to the above direction. In this reverse direction, the air blowing direction of the radiator cooling fan 70 is directed outward from the inside of the housing, and dust adhering to the dust screen 7a of the radiator 7 located laterally outward of the housing can be blown off outward.

As shown in fig. 4 to 11, the fan input pulley 72 provided on the inside of the body of the radiator 7 is supported by the fan mount 8 erected on the vehicle body frame 1.

The fan mount 8 has a flat plate-like seat plate 81 at the upper end of a pillar 80 erected on the vehicle body frame 1. The substrate 82 mounted on the upper surface side of the seat plate 81, the square tubular member 83 disposed on the upper side of the substrate 82 in the front-rear direction, and the mounting plate 84 having a plate surface standing up in the front-rear direction on the upper surface side of the square tubular member 83 are welded and fixed. The seat plate 81 and the base plate 82 are detachably connected and fixed by connecting bolts by abutting plate surfaces to each other.

As shown in fig. 8 to 11, a support shaft 71 is fixed to the mounting plate 84 in a state of penetrating the plate surface of the mounting plate 84, and the support shaft 71 pivotally supports the fan input pulley 72. Specifically, the connecting plate 73 is fixed by welding to the support shaft 71, the connecting plate 73 has a flange-like abutment surface opposed to the mounting plate 84, and the connecting plate 73 is bolted to the mounting plate 84 in an abutment state.

The pivot shaft 71 bolted to the mounting plate 84 is attached with the swing arm 60 at a position projecting outward of the body of the mounting plate 84, and with the operating lever 62 at a position projecting inward of the body through the mounting plate 84. The swing arm 60 and the operating lever 62 are pivotally supported so as to be rotatable while movement in the axial direction of the support shaft 71 is prevented by a snap ring 71 a.

A coupling pin 61 projecting toward the operation lever 62 is formed projecting from the swing arm 60, and an engagement hole 62a into which a head of the coupling pin 61 can be fitted is formed on the operation lever 62 side. The mounting plate 84 is formed with a long hole 84a through which the connecting pin 61 is inserted, in a predetermined range along an arc locus along which the connecting pin 61 rotates about the axial center p2A of the support shaft 71.

Therefore, when the connecting pin 61 of the swing arm 60 is fitted into the engagement hole 62a of the operating lever 62 in a state of penetrating the elongated hole 84a of the mounting plate 84, the swing arm 60 can be swung around the axial center p2A of the support shaft 71 within a predetermined range of the elongated hole 84a in accordance with the swing operation of the operating lever 62.

The swing arm 60 has arm portions 60A and 60B extending in 2 directions away from the axial center p2A of the support shaft 71. One arm portion 60A is provided with a support shaft 63a that acts on the first tension pulley body 63 of the forward rotation belt 36, and the other arm portion 60B is provided with a support shaft 64a that acts on the second tension pulley body 64 of the reverse rotation belt 37.

As shown in fig. 9, an arm portion 60A of the swing arm 60 to which the first tensioner body 63 is attached is located further away from the mounting plate 84 than an arm portion 60B to which the second tensioner body 64 is attached, and is located on the outer side of the machine body.

As shown in fig. 8, 9, and 11, an arm portion 60A to which the first tension pulley body 63 is attached is provided with a locking piece 66a, the locking piece 66a is used to lock a coil spring 66 (corresponding to an urging mechanism), and the coil spring 66 is rotationally urged toward a side (clockwise direction in fig. 8) where the normal rotation transmission belt 36 is tensioned. The other end side of the coil spring 66 is connected to a support column 80 of the fan mount 8, and the other end side of the coil spring 66 is tensioned so that the swing arm 60 is always biased to the side where the normal rotation transmission belt 36 is tensioned.

The reversible belt 37 is wound not only around the second tension pulley body 64 but also around the third tension pulley body 65.

The third tension pulley body 65 is pivotally supported on a support shaft 65a provided on the mounting plate 84, and the third tension pulley body 65 is provided on the mounting plate 84 so as to be positionally fixed, rather than being positionally changed by the swing operation of the operating lever 62.

As shown in fig. 6 and 7, the second sheave body 64 and the third sheave body 65 are disposed so as to be dispersed on both sides of a virtual line LA connecting the shaft center p1A of the relay output pulleys 35b and 35c as the driving rotating bodies and the shaft center p2A of the support shaft 71 as the rotation center of the fan input pulley 72 as the input rotating body.

The forward rotation belt 36 is wound around the relay output pulley 35b on the outside of the machine body, the fan input pulley 72, and the first tension pulley 63 among the relay output pulleys 35b and 35c as the driving rotating bodies. The relay output pulley 35b, the fan input pulley 72, and the first tension pulley body 63 are disposed so as to abut against the inner circumferential side of the normal rotation belt 36.

Therefore, as shown in fig. 6, when the operating lever 62 is operated to the "normal rotation" position shown by the solid line, the swing arm 60 swings in the clockwise direction, moving the first tension pulley 63 to the side where the normal rotation transmission belt 36 is tensioned. Due to the biasing action of the coil spring 66, even if the hand is released from the operation lever 62, the position of the first tension pulley body 63 can be maintained in the normal rotation transmission state.

At this time, the arm portion 60B of the swing arm 60 supporting the second tension pulley body 64 swings to the side where the reverse belt 37 is loosened (swings clockwise), and the reverse belt 37 is in a state where power transmission is not performed.

The reverse rotation belt 37 is wound around the relay output pulley 35c on the inner side of the machine body, the fan input pulley 72, the second sheave body 64, and the third sheave body 65, of the relay output pulleys 35b and 35c as the driving rotating bodies.

The reversing belt 37 is wound in a state in which the relay output pulley 35c, the second tension pulley body 64, and the third tension pulley body 65 are in contact with the inner circumferential side of the reversing belt 37, and the fan input pulley 72 is in contact with the outer circumferential side of the reversing belt 37.

Therefore, as shown in fig. 7, when the operating lever 62 is operated to the "reverse" position, the swing arm 60 swings counterclockwise against the biasing force of the coil spring 66, and the second tension pulley body 64 moves to the side where the reverse belt 37 is tensioned. In this state, the tensioned reversible belt 37 is in a reversible driving state.

At this time, the arm portion 60A of the swing arm 60 supporting the first tension pulley body 63 swings to the side where the normal rotation belt 36 is loosened (swings in the counterclockwise direction), and the normal rotation belt 36 is in a state where power transmission is not performed.

As described above, the normal rotation power transmission mechanism includes the relay output pulley 35b, the fan input pulley 72, the first tension pulley body 63, and the normal rotation belt 36, and the reverse rotation power transmission mechanism includes the relay output pulley 35c, the fan input pulley 72, the second tension pulley body 64, the third tension pulley body 65, and the reverse rotation belt 37.

The forward/reverse rotation selecting mechanism 6 is constituted by a tension clutch that can transmit or block power by selectively tightening or loosening the forward rotation transmission belt 36 of the forward rotation power transmitting mechanism and the reverse rotation transmission belt 37 of the reverse rotation power transmitting mechanism by swinging the swing arm 60 by operating the operating lever 62.

Here, in the swinging operation of the swinging arm 60 by the operation of the operation lever 62, the switching state to the normal rotation side can be maintained even if the operation force of the operation lever 62 is released due to the biasing force of the coil spring 66. The operation to the reverse side is continued only during the swing operation of the swing arm 60 by the operation of the operation lever 62, and when the operation of the operation lever 62 is released, the normal rotation driving state is automatically restored by the biasing force of the coil spring 66.

Reference numeral 67 shown in fig. 8, 9, and 11 is a rod-shaped retaining guide integrally provided on the swing arm 60, and reference numeral 68 is a plate-shaped retaining guide bent in an L-shape. Further, reference numeral 84b denotes a bar-shaped anti-slip guide provided on the mounting plate 84. These members are for preventing the forward rotation belt 36 or the reverse rotation belt 37 from being disengaged.

The operating lever 62 extends to the rear side of the engine body opposite to the front side of the engine body where the engine 3 is located at a position closer to the inner side of the engine body than the side cover 9 provided at the lateral outer side of the engine body, and the rear end portion of the operating lever 62 is exposed to a position closer to the rear side than the rear end of the side cover 9.

As shown in fig. 1, the side cover 9 is provided outside a space s1A on the vehicle body frame 1 where the engine 3 and the like on the right side of the machine body are located. A dust cover portion existing outside the body of the radiator 7 also serves as a part of the side cover 9. The operation lever 62 extends so as to be exposed to the rear side of the dust cover portion existing outside the body of the radiator 7.

Therefore, by operating the operating lever 62, which is gripped and exposed to the rear side of the machine body, to the reverse rotation side, the radiator cooling fan 70 can be operated in the reverse rotation direction as needed. Further, the normal rotation state can be automatically restored by releasing the operation to the reverse rotation side.

(other embodiment 1 of the first embodiment)

In the above embodiment, the front wheels 2F are non-steered wheels and the rear wheels 2R are steered wheels as the running device 2, but the present invention is not limited to this, and for example, the front wheels 2F may be steered wheels and the rear wheels 2R may be non-steered wheels. Further, both the front wheels 2F and the rear wheels 2R may be used as steered wheels.

The other structures may be the same as those of the above embodiment.

(other embodiment 2 of the first embodiment)

In the above embodiment, the front wheels 2F are driving wheels formed of non-steered wheels and the rear wheels 2R are steered wheels that are not driven as the running device 2, but the present invention is not limited to this. For example, the front wheels 2F may be steered wheels that are not driven, and the rear wheels 2R may be driven wheels that are not steered wheels, or both the front wheels 2F and the rear wheels 2R may be steered wheels, and both the front wheels 2F and the rear wheels 2R may be driven.

The other structures may be the same as those of the above embodiment.

(other embodiment 3 of the first embodiment)

In the above embodiment, the front traveling unit is constituted by the front wheels 2F as non-steered wheels, and the rear traveling unit is constituted by the rear wheels 2R as steered wheels, but the present invention is not limited thereto. For example, the front traveling unit may be configured by a crawler traveling device of a half-track type, and the rear traveling unit may be configured by the rear wheels 2R as steered wheels. Conversely, the front traveling unit may be configured by front wheels 2F as steering wheels, and the rear traveling unit may be configured by a semi-crawler type crawler traveling device.

In this case, the semi-crawler type crawler travel device may be driven so that the rear wheels 2R and the front wheels 2F formed of the steerable wheels are non-driven, or the semi-crawler type crawler travel device and the rear wheels 2R and the front wheels 2F formed of the steerable wheels may be driven.

The other structures may be the same as those of the above embodiment.

(other embodiment 4 of the first embodiment)

In the above embodiment, the grain tank 5 disposed above the threshing device 4 is shown to be capable of swinging obliquely about the swing axis z2A provided at one end side in the left-right direction, and the grain discharge port 5A capable of opening and closing is provided at the side where the swing axis z2A is provided, and the grains can be discharged in this oblique swinging posture, but the present invention is not limited to this. For example, the grain tank 5 may be provided with a discharging screw, not shown, for discharging grains, instead of the grain outlet 5A which can be opened and closed.

In the case of the above configuration, the grain can be discharged without providing the swing hydraulic cylinder 53 for tilting the grain box 5, but it is preferable to provide the swing hydraulic cylinder 53 so that the grain existing at the bottom of the box main body 51 can be gathered to the side of the discharge screw.

The other structures may be the same as those of the above embodiment.

(other embodiment 5 of the first embodiment)

In the above embodiment, the structure having the cab 15 as the operator's part is shown, but the present invention is not limited to this, and may be provided with only the operator's part and the operator's seat 15b without having the cab 15 as the operator's part.

The other structures may be the same as those of the above embodiment.

(other embodiment 6 of the first embodiment)

In the above embodiment, the power transmission system for transmitting power from the engine 3 to the radiator cooling fan 70 has been described as having a structure in which the second output pulley 31a, the relay input pulley 35a, the relay output pulley 35b, the relay output pulley 35c, and the fan input pulley 72 are attached to the output shaft 31 of the engine 3, but the present invention is not limited to the above-described structure in which the rotating body for output or input is constituted by a pulley, and may be constituted by a sprocket, for example.

In this case, a transmission chain may be used instead of the third belt 34, the normal rotation belt 36, and the reverse rotation belt 37 for the endless rotation belt for transmission.

The other structures may be the same as those of the above embodiment.

(other embodiment 7 of the first embodiment)

In the above-described embodiment, the configuration in which the relay input pulley 35a and the relay output pulleys 35b and 35c fixed to the same relay shaft 35 are provided as the driving rotating body of the power transmission system that transmits power to the radiator cooling fan 70 has been described, but the present invention is not limited to this. For example, the relay output pulleys 35b and 35c may be mounted on different shafts and driven separately.

The other structures may be the same as those of the above embodiment.

(other embodiment 8 of the first embodiment)

In the above embodiment, the first tension pulley body 63 that acts on the forward rotation belt 36 of the forward rotation power transmission mechanism and the second tension pulley body 64 that acts on the reverse rotation belt 37 of the reverse rotation power transmission mechanism are supported by the single swing arm 60, but the present invention is not limited to this structure.

For example, the first tensioner wheel body 63 and the second tensioner wheel body 64 may be provided in each of the plurality of swing arms 60.

The other structures may be the same as those of the above embodiment.

(other embodiment 9 of the first embodiment)

In the above embodiment, the structure in which the common support shaft 71 is used and the axial center of the swing arm 60 and the axial center of the fan input pulley 72 are made to be the same axial center p2A has been described, but the present invention is not limited to this structure.

For example, the swing arm 60 and the fan input pulley 72 may be supported at different support shafts and have different axial centers.

The other structures may be the same as those of the above embodiment.

(other embodiment 10 of the first embodiment)

In the above embodiment, the coil spring 66 is shown as the forward/reverse rotation selecting mechanism 6, and the coil spring 66 biases the swing arm 60 of the forward rotation power transmission mechanism in a direction to tension the forward rotation transmission belt 36. For example, the coil spring 66 may not be used.

The swing arm 60 may be fixed in position at two positions, i.e., the forward rotation side and the reverse rotation side.

The other structures may be the same as those of the above embodiment.

(other embodiment 11 of the first embodiment)

In the above-described embodiment, the configuration in which the power of the relay shaft 35 driven by the engine 3 is used as the driving device for driving the radiator cooling fan 70 is shown, but the present invention is not limited to this. For example, a power generation device driven by the engine 3, a drive device driven by an electric motor, or the like may be used.

The other structures may be the same as those of the above embodiment.

(other embodiment 12 of the first embodiment)

In the above-described embodiment, the structure in which the radiator 7 is disposed at the vehicle body rear side portion of the engine 3 disposed in the state in which the output shaft 31 is oriented in the left-right direction is shown, but the present invention is not limited to this, and for example, the radiator 7 may be disposed at the vehicle body front side portion of the engine 3 or the radiator 7 may be disposed at the vehicle body upper side portion of the engine 3.

The other structures may be the same as those of the above embodiment.

(other embodiment 13 of the first embodiment)

In the above-described embodiment, the all-feed type (normal type) combine as an example of the combine is shown as the working machine, but the present invention is not limited to this, and may be a working machine such as a weeding machine, a tractor, a construction machine, or a carrier.

(second embodiment)

The second embodiment is explained below based on the description of the drawings.

(Overall Structure)

Fig. 13 to 17 show a whole-feed type (normal type) combine as an example of the combine of the present invention. Fig. 13 is a right side view showing the entire body, and fig. 14 is a plan view showing the entire body. Fig. 15 is a plan view showing a state where the grain tank 205 is removed and the threshing device 204 and the like are exposed.

As shown in these figures, the above-described all-in-one combine harvester includes a traveling device 202, and the traveling device 202 includes a pair of left and right front wheels 202F and 202F (corresponding to a front traveling device) and a pair of left and right rear wheels 202R and 202R (corresponding to a rear traveling device) located below a vehicle body frame 201.

The traveling machine body is configured as follows. That is, a cab 215 (corresponding to a cab) is provided at the front of the vehicle body frame 201, a threshing device 204 and a grain tank 205 are provided at the rear side of the cab 215, and a grass discharge processing device 216 is provided at the rearmost part of the vehicle body frame 201. A harvesting processing device 217 is provided at the front portion of the vehicle body frame 201, and the harvesting processing device 217 is moved up and down about a horizontal axis (not shown) with respect to the vehicle body frame 201.

An engine 203 is mounted on a front portion of the body frame 201 and on a lateral side portion of the threshing device 204, and a radiator 207 is disposed at a rear position apart from the engine 203. A fuel tank 208 is mounted on the side opposite to the engine 203 with the threshing device 204 interposed therebetween. In addition to the traveling device 202, the power of the engine 203 is transmitted to the threshing device 204, the reaping processing device 217, a radiator fan 207a for cooling the radiator 207, and the like.

The front wheels 202F of the running gear 202 transmit power transmitted via a front wheel drive shaft 224 to the front wheels 202F via a reduction gearbox 225 and a front axle 202a, wherein the front wheel drive shaft 224 is mounted on the front portion of the vehicle body frame 201 and extends from the transmission case 220 to the left and right, the reduction gearbox 225 enters a recessed portion formed on a surface of the front wheels 202F facing the inside of the machine body, and the front axle 202a is supported by the reduction gearbox 225.

Thus, the front wheels 202F are mounted, and the power of the engine 203 is transmitted to the front wheels 202F via the front axle 202a, and the front wheels 202F are rotationally driven about the horizontal transverse axis x1B of the front axle 202 a. The front wheels 202F are non-steered wheels formed of tires having a larger width and diameter in the right-left direction than the rear wheels 202R.

As shown in fig. 14 and 15, the rear wheels 202R are provided at the rear portion of the vehicle body frame 201 on both left and right end sides of a rear wheel support frame (not shown) attached so as to be swingable left and right about a front-rear direction axial center (not shown), and the rear wheels 202R are constituted by steered wheels and have a rear axle 202b capable of performing a steering operation about a vertically swinging axial center. The rear wheel 202R is formed of a tire wheel having a smaller width and diameter in the right-left direction than the front wheel 202F, and the rear wheel 202R rotates about a horizontal lateral axis x2B of the rear axle 202 b.

(reaping apparatus)

As shown in fig. 13 to 15, a harvesting processing device 217 is provided on the front side of the threshing device 204 mounted on the vehicle body frame 201, and the harvesting processing device 217 is moved up and down about a horizontal axis in the left-right direction.

The harvesting device 217 has: a feeder 217A for supplying harvested crops such as straw to the threshing device 204; raking the reel 217B, and raking the spike head side of crops such as planted standing straws and the like; a harvesting device 217C for cutting off the root side of the plant; and a horizontal transfer screw 217D for gathering the harvested crops toward the center in the harvesting direction. The harvesting unit 217 harvests the crop and feeds it to the feeder 217A for supply to the threshing unit 204.

Here, although not shown, the feeder 217A is provided with an endless belt-like carrier that rotates in the front-rear direction inside a square cylindrical housing, and the feeder 217A carries the delivered harvested crop back and up. The crop conveying direction of the feeder 217A is the front-rear direction along the rotation axis p1B (see fig. 15) of the threshing cylinder 240 in the threshing device 204, and the raking reel 217B, the harvesting device 217C, and the horizontal transfer screw 217D can also be moved up and down in accordance with the up-and-down movement of the feeder 217A.

(threshing device)

As described above, the threshing device 204 is disposed on the vehicle body frame 201 such that the threshing cylinder rotation axis p1B is along the front-rear direction. The threshing device 204 is disposed in the front-rear direction interval between the front wheels 202F and the rear wheels 202R in the front-rear direction, and is disposed in the width interval between the front wheels 202F and the rear wheels 202R on both the left and right sides in the left-right direction.

As shown in fig. 13, the lower surface of the threshing device 204 is slightly lower than the front axle 202a of the front wheels 202F as non-steered wheels and slightly higher than the rear axle 202b of the rear wheels 202R as steered wheels. In other words, the lower surface of the threshing device 204 is disposed at a height position substantially equal to the height position of the front axle 202a of the front wheel 202F as a non-steered wheel or the height position of the rear axle 202b of the rear wheel 202R as a steered wheel.

The threshing device 204 arranged as described above has the threshing cylinder rotation axis p1B of the threshing device 204 located on the left side with respect to the center line CLB in the left-right direction of the machine body. Since the center line of the threshing device 204 in the left-right direction is located at the same position as the rotation axis p1B of the threshing cylinder 240 arranged inside, the whole threshing device 204 is arranged at a position shifted to the left side with respect to the center line CLB in the left-right direction of the machine body.

The feeder 217A for supplying harvested crops to the threshing device 204 is disposed on the left side with respect to the center line CLB in the left-right direction of the machine body, similarly to the threshing device 204. As shown in fig. 15, the feeder 217A partially overlaps the transmission case 220 on the right side with respect to the center line CLB in the left-right direction of the machine body in plan view.

The grass discharge processing device 216 is integrally installed at the rear part of the threshing device 204, and the grass discharge after the threshing processing is cut off and discharged outside the machine body.

The threshing device 204 is formed in a rectangular box shape that is long in the front-rear direction of the machine body, and has a wind turbine 241 at its front end (see fig. 20). A windmill shaft 241a having a wind feeding blade of the windmill 241 extends outward in the right lateral direction of the threshing box 204A, and a threshing input pulley 241b (corresponding to a threshing-side rotating body) for inputting power transmitted from the engine 203 to the threshing device 204 is attached to an extended portion of the windmill shaft 241 a.

The threshing device 204 is not provided with an auxiliary wind turbine, and only the wind turbine 241 is used to blow air to the selected parts.

A threshing cylinder 240 is provided inside the threshing device 204 so as to be rotationally driven around a cylinder shaft 240a in the front-rear direction, and the threshing cylinder 240 is used to perform threshing processing on the harvested crop fed from the feeder 217A side. The threshing cylinder 240 is provided with a sorting device 242 and the like, and the sorting device 242 performs swing sorting of the harvested crops threshed by the threshing cylinder 240 by the air blowing operation of the wind turbine 241.

(grain box)

As shown in fig. 13 to 15, the grain tank 205 is provided on the rear side of the cab 215 so as to straddle the tank support base 213 on the right lateral side of the vehicle body frame 201 and the threshing device 204 on the left lateral side of the vehicle body frame 201.

The grain tank 205 is provided with a tank-shaped tank main body 251 on the upper side of a bottom frame 250 formed by assembling various steel materials such as square pipes into a grid shape, and the tank main body 251 has a width in the left-right direction that extends over substantially the entire width in the left-right direction of the machine body.

These bottom frames 250 and the box main body 251 are integrally coupled, and are supported so as to be swingable about a swing axis center z2B in the front-rear direction by a swing support shaft 252 provided at an upper end portion of the box support base 213.

As shown in fig. 13 and 15, the box support base 213 is provided on the vehicle body frame 201 at a right lateral side portion of the threshing device 204 so as to be positioned between the front wheels 202F and the rear wheels 202R. The box support base 213 has an outer pillar 213A and an inner pillar 213B, the outer pillar 213A is disposed on a side away from the threshing device 204, and the inner pillar 213B is disposed on a side closer to the threshing device 204 than the outer pillar 213A. Lower ends of the outer pillar 213A and the inner pillar 213B are fixed to the vehicle body frame 201, and upper ends of the outer pillar 213A and the inner pillar 213B are coupled to the upper frame 213C. In the upper frame 213C, an end portion of the grain tank 205 on the grain discharge port 205A side corresponding to one end side in the left-right direction is connected and supported so as to be swingable in an undulating manner about a swing axial center z2B in the front-rear direction.

A hydraulically driven swing cylinder 253 is mounted between the inner post 213B of the tank support table 213 and the bottom frame 250 of the grain tank 205. By the telescopic operation of the swing hydraulic cylinder 253, the grain tank 205 can be swung up and down about the swing shaft center z2B to change the posture between the storage posture in which the bottom surface of the tank main body 251 is horizontal or substantially horizontal and the discharge posture in which the bottom surface is upright.

(driver's cabin)

As shown in fig. 13 and 15, cab 215 is mounted on cab frame 211 erected on body frame 201.

Thus, cab 215 is supported by body frame 201 via cab frame 211 at a position higher than the upper edge of the outer diameter of front wheel 202F and further forward than the rear edge of front wheel 202F.

A steering handle 215a, an operator seat 215b, and the like for steering operation are provided in the cab 215, and the steering handle 215a is used to steer the rear wheels 202R. The cab 215 is provided with various operation members for operation and work, meters, and the like.

(Power transmission structure)

Next, a power transmission structure for transmitting the power of the engine 203 to the threshing device 204 via the input shaft 221 of the transmission 220 will be described.

As shown in fig. 16 to 20, the engine 203 is disposed on the vehicle body frame 201 at a position on the right outer side with a crankshaft (not shown) along the left-right direction of the machine body.

On one end side (inside the machine body) in the left-right direction of the engine 203, a flywheel 203A and an output pulley 230 (corresponding to an engine output rotating body) are provided in a state where the axial direction is along the left-right direction of the machine body. On the other end side (outside the machine body), an output shaft 231 projects, and a second output pulley 231a is attached to the output shaft 231. As shown in fig. 20, a third transmission belt 234 made up of 1 v belt as an example of an endless rotating belt is wound around the second output pulley 231a in a tensioned state, and outputs a driving force to the radiator fan 207 a.

The outer peripheral portion of the output pulley 230 has 3 belt grooves for winding a first transmission belt 232 (corresponding to an engine power transmission portion) composed of 3 triangular belt groups as an example of an endless rotating belt.

The transmission case 220 located on the front side of the engine 203 on the inner side (left side in the left-right direction) of the body with respect to the engine 203 has an input shaft 221 projecting outward of the body (right side in the left-right direction), and an input/output pulley 222 is integrally rotatably attached to the input shaft 221.

The input/output pulley 222 includes a first rotating body portion 222A (corresponding to an input rotating body) and a second rotating body portion 222B (corresponding to an output rotating body), the first rotating body portion 222A has 3 belt grooves, the 3 belt grooves are used for winding 3 v belts of the first transmission belt 232, the second rotating body portion 222B has 2 belt grooves, and the 2 belt grooves are used for winding a second transmission belt 233 described below.

The first rotating body 222A and the second rotating body 222B are formed by integrally formed multiple pulleys, and the first rotating body 222A has a large diameter and is located at a position closer to the outside of the machine body where the engine 203 is located, and the second rotating body 222B has a small diameter and is located at a position closer to the inside of the machine body where the threshing device 204 is located.

The transmission 220 is provided with a continuously variable transmission 223 on the side opposite to the side where the input/output pulley 222 is provided, and the continuously variable transmission 223 is used for shifting the power input from the input shaft 221 and transmitting the power to the running gear 202. The power shifted by the continuously variable transmission 223 is output from the front wheel drive shaft 224 via a transmission mechanism, not shown, provided inside the transmission case 220.

A second belt 233 (corresponding to a power transmission unit for threshing) composed of 2 triangular belt sets as an example of an endless rotating belt is wound around the second rotating body portion 222B of the input/output pulley 222.

The second belt 233 is wound around a threshing input pulley 241B provided on a windmill shaft 241a of the threshing device 204, and the engine power is input from the second rotating body portion 222B to the threshing device 204 via the second belt 233.

The threshing input pulley 241B on the windmill shaft 241a side is formed to have a diameter larger than the second rotating body portion 222B and the output pulley 230, and reduces the engine speed and transmits the reduced engine speed to the windmill shaft 241 a.

As shown in fig. 16 and 18, the threshing device 204 is mounted on the vehicle body frame 201 and located on the rear side of the transmission case 220. The windmill shaft 241a is located closer to the axial center x3B of the output pulley 230 and the output shaft 231 of the engine 203 than the input shaft 221 of the transmission 220 in the front-rear direction. Specifically, as shown in fig. 16, the windmill shaft 241a is located at a position overlapping the output pulley 230 when viewed in the direction of the axial center x3B of the output pulley 230 and the output shaft 231 of the engine 203.

Therefore, the output pulley 230 and the threshing input pulley 241b overlap each other, and the first belt 232 and the second belt 233 also overlap each other.

As shown in fig. 17 and 18, the output pulley 230, the input-output pulley 222, and the threshing input pulley 241b are also disposed between the engine 203, the transmission 220, and the threshing device 204, as viewed from the front or from the top. The input/output pulley 222 is disposed such that: the first rotor portion 222A is close to the engine 203 side and the second rotor portion 222B is close to the gearbox 220 and the threshing device 204 side.

Therefore, the first and second belts 232, 233 are also disposed between the engine 203, the gearbox 220, and the threshing device 204.

The first tension pulley 235 acts on the first belt 232, and the first belt 232 is wound around the output pulley 230 of the engine 203 and the first rotator portion 222A of the transmission 220.

The second tension pulley 236 acts on the second belt 233, and the second belt 233 is wound around the second rotating body portion 222B of the transmission case 220 and the threshing input pulley 241B of the threshing device 204.

As shown in fig. 17, one end side of the support shaft 235a of the first tension wheel 235 is extended long in one direction, and the extended portion is supported by a free end side of the first arm member 235b which is swingable and a free end side of the urging mechanism 237.

As shown in fig. 16, the base end side of the first arm member 235b is pivotally supported by an L-shaped support base frame 212 of the vehicle body frame 201, and the support base frame 212 is lifted to a position higher than the transmission case 220 and serves as a mount base for the cab frame 211. The base end side of the urging mechanism 237 is pivotally supported by the bracket 201a, and the bracket 201a is fixed to the vehicle body frame 201 on the side closer to the engine 203.

The urging mechanism 237 is provided with a compression spring 237a, and the compression spring 237a urges in a direction to shorten a distance between the support shaft 235a and the pivotally supporting portion on the base end side of the urging mechanism 237. The first tension roller 235 is biased so as to be biased to the side where the first belt 232 is always tensioned by the biasing force of the compression spring 237 a.

A support shaft 236a of the second tension pulley 236 is attached to the second arm member 236b, and a base end side of the second arm member 236b is pivotally supported on an upper portion of the transmission case 220 so as to be swingable. An operating member 236c is coupled to a middle position of the second arm member 236b in the longitudinal direction, and the operating member 236c has a coil spring. The opening state and the closing state of the threshing clutch can be switched by a switching operation member, not shown, such as a swingable operating lever connected to the operating member 236 c.

As a result, the second tension pulley 236 is swung to the lifted side to switch the second belt 233 to the tensioned side, thereby bringing the threshing clutch which transmits the engine power to the threshing device 204 into an open state, and the second tension pulley 236 is lifted to switch the second belt 233 to the slack side, thereby bringing the threshing clutch into a cut-off state which cuts off the transmission of the engine power to the threshing device 204.

As shown in fig. 20, the engine power input to the windmill shaft 241a is distributed to a threshing cylinder side driving mechanism 243 for driving the threshing cylinder 240, a harvesting side driving mechanism 244 for transmitting the power to the harvesting processing device 217 including the feeder 217A, and a sorting side driving mechanism 245 for driving the sorting processing device 242 and the like. The threshing cylinder side driving mechanism 243, the harvesting side driving mechanism 244, and the sorting side driving mechanism 245 each include a belt. Further, the power is also transmitted from the downstream side of the transmission of the sorting-side drive mechanism 245 to the grass discharge processing device 216 via the transmission belt 246.

The sorting side driving mechanism 245 includes a belt 245a for transmitting power to the primary screw 242a and the ejector 247, a belt 245b for transmitting power to the secondary screw 242b and the secondary returning device 248, and a belt 245c for transmitting power to the swinging sorting plate 242 c.

(other embodiment 1 of the second embodiment)

In the above embodiment, the front wheels 202F are non-steered wheels and the rear wheels 202R are steered wheels as the running device 202, but the present invention is not limited to this, and for example, the front wheels 202F may be steered wheels and the rear wheels 202R may be non-steered wheels. Further, both the front wheels 202F and the rear wheels 202R may be used as steered wheels.

The other structures may be the same as those of the above embodiment.

(other embodiment 2 of the second embodiment)

In the above embodiment, the front wheels 202F are driving wheels formed of non-steered wheels and the rear wheels 202R are steered wheels that are not driven as the running device 202, but the present invention is not limited to this.

For example, the front wheels 202F may be steered wheels that are not driven, and the rear wheels 202R may be driven wheels that are not steered wheels, or both the front wheels 202F and the rear wheels 202R may be steered wheels, and both the front wheels 202F and the rear wheels 202R may be driven.

The other structures may be the same as those of the above embodiment.

(other embodiment 3 of the second embodiment)

In the above embodiment, the front traveling unit is constituted by the front wheels 202F as non-steered wheels, and the rear traveling unit is constituted by the rear wheels 202R as steered wheels, but the present invention is not limited thereto. For example, the front traveling unit may be configured by a crawler travel device of a half-track type, and the rear traveling unit may be configured by the rear wheels 202R as steered wheels. Conversely, the front traveling unit may be configured by front wheels 202F as steering wheels, and the rear traveling unit may be configured by a semi-crawler type crawler traveling device.

In this case, the semi-crawler type crawler travel device may be driven so that the rear wheels 202R and the front wheels 202F formed of the steerable wheels are non-driven, or the semi-crawler type crawler travel device and the rear wheels 202R and the front wheels 202F formed of the steerable wheels may be driven.

The other structures may be the same as those of the above embodiment.

(other embodiment 4 of the second embodiment)

In the above embodiment, the grain tank 205 disposed above the threshing device 204 is shown to be capable of swinging obliquely about the swing axis z2B provided at one end side in the left-right direction, and the grain discharge port 205A capable of opening and closing is provided at the side where the swing axis z2B is provided, and the grains can be discharged in this oblique swinging posture, but the present invention is not limited to this. For example, the grain tank 205 may be provided with a discharging screw, not shown, instead of the grain outlet 205A that can be opened and closed, to discharge the grains.

In the case of the above configuration, the grain can be discharged without providing the swing hydraulic cylinder 253 for tilting the grain tank 205, but it is preferable to provide the swing hydraulic cylinder 253 so that the grain existing at the bottom of the tank main body 251 can be gathered to the side of the discharge screw.

The other structures may be the same as those of the above embodiment.

(other embodiment 5 of the second embodiment)

In the above embodiment, the structure having the cab 215 as the driver's part is shown, but the present invention is not limited to this, and the driver's cab 215 as the driver's part may not be provided, and only the steering handle 215a and the driver's seat 215b may be provided.

The other structures may be the same as those of the above embodiment.

(other embodiment 6 of the second embodiment)

In the above embodiment, the configuration in which the output pulley 230 as the engine output rotating body, the input/output pulley 222 as the input rotating body and the output rotating body, and the threshing input pulley 241b as the threshing side rotating body are employed is shown, but the present invention is not limited to the above-described configuration in which the rotating body for output or input is constituted by a pulley, and may be constituted by a sprocket, for example. In this case, a transmission chain may be used instead of the transmission belts 232 and 233 as the endless rotating belt for transmission. In addition, in the transmission structure using the endless rotating belt in other parts such as the threshing device 204, a transmission chain may be used instead of the transmission belt.

The other structures may be the same as those of the above embodiment.

(other embodiment 7 of the second embodiment)

In the above embodiment, the second rotator portion 222B as the output rotator is shown mounted on the same side of the input shaft 221 as the first rotator portion 222A as the input rotator with respect to the gearbox 220, wherein the second rotator portion 222B transmits power to the threshing device 204 side. However, the present invention is not limited to this, and for example, the second rotating body portion 222B may be located on the opposite side of the transmission case 220 from the first rotating body portion 222A.

The other structures may be the same as those of the above embodiment.

(other embodiment 8 of the second embodiment)

In the above embodiment, the windmill shaft 241a is adopted as the threshing-side rotating body, but the present invention is not limited to this, and a shaft suitable for use as a relay shaft that can transmit power can be adopted.

The other structures may be the same as those of the above embodiment.

(other embodiment 9 of the second embodiment)

In the above embodiment, the first rotating body portion 222A and the second rotating body portion 222B are configured by the input/output pulley 222 formed integrally, but the present invention is not limited to this, and for example, the first rotating body portion 222A and the second rotating body portion 222B may be configured by pulleys or sprockets formed separately, and the first rotating body portion 222A and the second rotating body portion 222B may be fixed to the input shaft 221.

The other structures may be the same as those of the above embodiment.

(other embodiment 10 of the second embodiment)

In the above embodiment, the first belt 232 as the engine power transmission unit and the second belt 233 as the threshing power transmission unit are overlapped with each other when viewed in the axial direction of the output shaft 231 of the engine 203, but the present invention is not limited to this, and for example, the first belt 232 and the second belt 233 may be arranged in a state of being shifted from each other in the vertical direction.

The other structures may be the same as those of the above embodiment.

(other embodiment 11 of the second embodiment)

In the above embodiment, the structure in which the transmission case 220 is located in the front of the engine 203 is shown, but the present invention is not limited to this, and for example, the transmission case 220 may be located in the rear of the engine 203.

The other structures may be the same as those of the above embodiment.

(other embodiment 12 of the second embodiment)

As a combine harvester, the combine harvester is applicable not only to a harvester that harvests grains such as rice, wheat, and corn, but also to a harvester that harvests beans such as soybean, and flowers such as vegetables. And the harvester is not limited to a common combine harvester, and can also be a semi-feeding type combine harvester.

(third embodiment)

Next, a third embodiment will be explained based on the description of the drawings.

(Overall Structure)

As shown in fig. 21 and 22, in a general type combine, a travel machine body 303 includes a pair of left and right rubber-tired front wheels 301 as a front travel device which cannot be steered and a pair of left and right rubber-tired rear wheels 302 as a rear travel device which can be steered. A harvesting conveyor 304 for harvesting crops and conveying the crops rearward is supported at the front of the traveling machine body 303 so as to be movable up and down about a lateral fulcrum P1C by a harvesting lift cylinder 305. The traveling machine body 303 includes a driving unit 307, a threshing device 308, a grain tank 309, a driving engine 310, a fuel tank 311, and the like. The driver part 307 is located on the front side, covered with a cab 306, and is on which a driver rides. The threshing device 308 performs threshing processing on the crop harvested by the harvest transport unit 304. The grain tank 309 stores grains threshed by the threshing device 308. The fuel tank 311 stores fuel for supply to the engine 310. A straw discharge processing device 312 is provided at the lower part of the rear side of the threshing device 308, and the straw discharge processing device 312 cuts up straw (straw discharge) threshed by the threshing device 308 and discharges the straw to the outside of the machine body.

The driver gets on and off the cab 307 from the left side of the body, and the cab 307 has a ladder 307a for getting on and off and a step 307b for getting on and off on the left side of the driver 307. In the present embodiment, when defining the left-right direction, the left side or the right side is defined as viewed in the machine body traveling direction. Therefore, the left and right directions in the drawing may be different.

The harvesting and conveying unit 304 includes a harvesting unit 313 and a feeder 314, the harvesting unit 313 collects harvested crops at a center portion in a harvesting direction after harvesting the planted crops, and the feeder 314 conveys the harvested crops collected at the center toward the threshing device 308 at the rear of the machine body.

The harvesting section 313 includes a pusher-type harvesting knife 315, a horizontal transfer screw 316, a rotary drum 317, and the like. The harvesting knife 315 cuts the root of the crop, the horizontal transfer auger 316 gathers the harvested crop toward the center in the harvesting direction, and the rotating drum 317 rakes the ear tip of the crop to be harvested rearward. The feeder 314 is provided with a pair of left and right endless rotating chains 319 wound and stretched in the front-rear direction in a square tubular feeding box 318. The feeder 314 includes a carrier 320, and the carrier 320 is stretched across the endless rotating chains 319 on both the left and right sides and is provided at an appropriate interval in the circumferential direction. The crop received from the harvesting unit 313 is transported rearward and upward by the transporting body 320.

The fuel tank 311 is located on the left side of the threshing device 308 and the engine 310 is located on the right side of the threshing device 308. The upper portion of the left outer end of the traveling machine body 303, which is the outer portion of the left lateral side of the machine body of the threshing device 308, is covered with the left upper cover 321. The lower part of the outer part of the left lateral side of the body of the threshing device 308 is covered by a fuel tank 311 which also serves as a left lower cover.

The upper left cover 321 is supported by a pair of front and rear support mechanisms 323A, 323B fixedly extended from the threshing device 308 so as to be swingable about an axis X1C oriented in the front-rear direction of the machine body, and is freely switchable between a vertical operating posture and a horizontal opening posture. The longitudinal operating posture is a posture covering the outside part on the left lateral side of the body of the threshing device 308, and the lateral opening posture is a posture swinging upward and outward to open the outside part on the left lateral side of the body of the threshing device 308. The rear support mechanism 323B includes a gas damper 324, and the gas damper 324 holds the left upper cover 321 in a position freely in the open posture.

Further, although not shown, the fuel tank 311 is supported by the body frame 325 so as to be freely swingable about the vertical axis at a rear portion of the body, and the left side of the lower portion of the threshing device 308 can be opened by swinging the front portion of the fuel tank 311 about the vertical axis.

As shown in fig. 24 and 25, the threshing device 308 is covered with side walls 308A on both right and left sides and a top plate 326 on the top. As shown in fig. 23, a threshing chamber 329 for threshing the harvested straw conveyed by the harvest transport unit 304 is formed by including a rotary threshing cylinder 327 and a receiving net 338 provided along the outer periphery of the threshing cylinder 327 on the upper side of an internal space surrounded by the left and right side walls 308A and the top plate 326. Further, a sorting unit 330 is provided below the threshing chamber 329, and the sorting unit 330 sorts the threshed products that have leaked from the threshing chamber 329 into grains, grass clippings, and the like.

(threshing chamber)

The left side wall 308A of the threshing device 308 has an upper portion covering the left side of the threshing chamber 329, and is formed by a detachable left side plate 331. The left side plate 331 of the threshing chamber 329 corresponds to a side plate on the housing side.

Next, the left side plate 331 of the threshing chamber 329 will be described.

As shown in fig. 24 and 27, the left side plate 331 is divided into 2 pieces in the front-rear direction of the machine body, i.e., in the rotation axis direction of the threshing cylinder 327.

The 2 divided side plates 331A each have a locking portion 334 at a lower portion, the locking portion 334 is locked to a locked portion 333 provided in the threshing frame 332 so as to be freely locked and released, and an upper portion of the divided side plate 331A is detachably connected and fixed to a connected portion of the threshing frame 332 in a state where the locking portion 334 is locked to the locked portion 333.

Specifically, as shown in fig. 24 to 26, each of the 2 divided side plates 331A has a rod-shaped locking pin 334b protruding downward at 2 locations separated in the front-rear direction of a horizontal surface portion 334a formed by bending the lower end portion. A through hole 333b for positioning is formed in the upper surface 333a of the square-tube-shaped intermediate frame body 337 of the threshing frame 332 extending in the front-rear direction at the upper-lower intermediate portion of the threshing device 308, and the locking pin 334b is inserted and engaged in the up-down direction through the through hole 333 b.

That is, the lower end portion of the divided side plate 331A is placed and supported in a positioned state by abutting and engaging the horizontal plane portion 334a with the upper surface 333a of the intermediate frame body 337 and inserting and engaging the locking pin 334b into the through hole 333 b. Therefore, the horizontal surface portion 334a and the locking pin 334b constitute the locking portion 334, and the upper surface 333a of the intermediate frame body 337 and the through hole 333b constitute the locked portion 333.

Further, screw insertion holes 339 are formed in 2 positions separated in the front-rear direction of the upper portion of the divided side plate 331A. Further, a connecting bracket 341 having an L-shaped cross section as a connected portion is connected to the upper frame body 340 of the threshing frame 332 in a square tube shape extending in the front-rear direction at the upper portion side portion of the threshing device 308 at a position corresponding to the screw insertion hole 339. The upper portion of the divided side plate 331A is detachably coupled and fixed by inserting the wing bolt 342 through the screw insertion hole 339 formed in the divided side plate 331A and the insertion hole 343 formed in the coupling bracket 341 and by screwing the wing bolt to the nut 344 welded and fixed to the rear surface of the coupling bracket 341.

In this configuration, the 2 divided side plates 331A can be removed by releasing the butterfly bolts 342 from being screwed, and releasing the insertion engagement of the locking pin 334b into the intermediate frame body 337. The fastening pin 334b at the lower end of the divided side plate 331A is inserted into and engaged with the through hole 333b of the intermediate frame body 337, and the horizontal surface portion 334a is placed and supported on the upper surface 333a of the intermediate frame body 337, and the butterfly bolt 342 is screwed to fix the upper portion, thereby facilitating the mounting.

When the left side plate 331 of the threshing chamber 329, which is the 2 divided side plates 331A, is removed, an opening K1C is formed in a portion corresponding to the threshing chamber 329, and the receiving net 338 can be taken out through the opening K1C. The structure of the receiving net 338 will be described below.

As shown in fig. 25 to 27, the left side plate 331 of the threshing chamber 329 has a guide plate 345, and the guide plate 345 is inclined such that the lower the inner side is, the more toward the inner side of the threshing chamber 329. Further, in each of the 2 divided side plates 331A, a guide plate 345 is provided so as to extend from one end portion to the other end portion along the rotation axial center direction of the threshing cylinder 327, that is, the front-rear direction of the machine body.

The guide plate 345 guides the threshed processed objects, which have dropped in large quantities from a portion of the receiving net 338 located upstream in the rotation direction of the threshing cylinder 327, i.e., the left end of the threshing chamber 329, to move to the right. As a result, the threshed objects can be supplied to the sorting processing unit 330 in a state as uniform as possible.

The guide plate 345 has a bottom plate 346 that closes a gap with the left side plate 331 at a lower end portion thereof. The bottom plate 346 is inclined so as to be positioned lower as it approaches the left side plate 331. The bottom plate 346 is integrally formed in a state of being continuously coupled from the lower end of the guide plate 345, and the lower end of the bottom plate 346 is fixedly coupled to the left side plate 331.

That is, the guide plate 345 and the bottom plate 346 are integrally formed by bending a single plate-shaped metal material into an approximately L-shape, and the upper end side portion and the lower end side portion of the plate bodies of the guide plate 345 and the bottom plate 346 are fixedly coupled to the left side plate 331 by welding.

The guide plate 345 has longitudinal shielding plates 347 at both ends in the front-rear direction thereof to close the gap with the left side plate 331. The shielding plate 347 is also made of a plate-shaped metal material similarly to the guide plate 345, and is connected to the guide plate 345, the bottom plate 346, and the left side plate 331 at both longitudinal direction side end portions of the guide plate 345 by spot welding. The shielding plate 347 is formed in a substantially triangular shape when viewed in the front-rear direction, and is formed by bending a plate-shaped metal material, and therefore, a slight gap is formed in the folded corner portion. As a result, fine grass clippings and the like enter the inside of the space surrounded by the guide plate 345, the bottom plate 346, and the shield plate 347 through the gap. Here, as shown in fig. 27, an opening 346A for dust discharge is formed in the bottom plate 346. Even if grass clippings or the like intrude into the interior, the grass clippings or the like can be discharged downward through the opening 346A.

(threshing cylinder)

The threshing cylinder 327 will be explained below.

As shown in fig. 23 and fig. 28 (a), the threshing cylinder 327 has a threshing cylinder shaft 350, and the threshing cylinder shaft 350 is supported across a front side frame 348 and a rear side frame 349 of the threshing frame 332 so as to be freely rotatable about the machine body in the front-rear direction toward the axis X2C. The threshing cylinder 327 rotates integrally about the threshing cylinder shaft 350, and has a rake portion 351 forming a front end portion and a threshing processing portion 352 forming a rear portion side.

The raking part 351 has 2 raking conveying helical blades 354 on the outer peripheral surface of a body 353 formed in a truncated cone shape with a thin tip, and the raking part 351 is of a helical conveying type and rakes all the harvested straws from the feeder 314 rearward by rotating. A bolt insertion hole 355 is formed in the spiral blade 354, and the spiral insertion hole 355 is used for attaching a wear prevention plate (not shown) when crops having a high wear risk such as rice are harvested.

The threshing processing unit 352 includes: a plurality of support plates 356a, 356b, 356c formed in a disc shape and integrally rotatably connected and fixed to the threshing cylinder shaft 350; 6 support rods 357, which are arranged at equal intervals in a circumferential direction of the threshing cylinder 327, and are connected to the support plates 356a, 356b, 356 c; and rod-shaped threshing teeth 358 protruding toward the outer peripheral side of the threshing cylinder 327 from a plurality of portions arranged in the axial direction of the support rods 357. The support plates 356a, 356b, and 356c include a front side support plate 356a, 3 middle side support plates 356c, and a rear side support plate 356 b.

As shown in fig. 25, 26 and 28, the support rod 357 is constructed of a round tube of material. The threshing teeth 358 are made of round bar material and are integrally connected and fixed by welding in a state of penetrating the support rod 357 in the radial direction of the threshing cylinder 327. Then, at positions corresponding to the support plates 356a, 356b, and 356c, 6 support rods 357 are connected by welding to which connecting brackets 359, and by screwing the brackets 359 to the support plates 356a, 356b, and 356c, respectively.

The support rod 357 has a structure that can be installed even if the front-rear orientation is exchanged. That is, the support rod 357 can be removed by releasing the bolt-fastening of the brackets 359 to the support plates 356a, 356b, 356c, and the positions of the brackets 359 and the support plates 356a, 356b, 356c can be set so that the brackets 359 can be bolt-fastened to the support plates 356a, 356b, 356c even if the front-rear direction is changed.

Specifically, the center support plate 356c located at the center in the front-rear direction among the 3 center support plates 356c is located at the center in the front-rear direction of the threshing cylinder 327, and the intervals from the center support plate 356c located at the center to the center support plates 356c located at both the front and rear sides are set to be the same. The distance from the front intermediate support plate 356c to the front support plate 356a is set to be the same as the distance from the rear intermediate support plate 356c to the rear support plate 356 b.

Further, the support rods 357 are attached in advance in a state where the front-rear directions of the support rods 357 adjacent to each other in the circumferential direction are different from each other, and the threshing teeth 358 in the axial direction are displaced from each other at every half interval when the front-rear directions are different from each other, whereby the threshing process can be efficiently performed on the processed object.

Each support rod 357 is connected to each support plate 356a, 356b, 356c in a state where the threshing teeth 358 are inclined toward the downstream side in the rotation direction of the threshing cylinder 327 to form a sweep angle. Even if the support rod 357 is reversed in the front-rear direction, when the bracket 359 is screwed to the support plates 356a, 356b, and 356c, the position can be restricted so that the bracket 359 can be accurately tilted, and the sweep angle of all the threshing teeth 358 can be accurately set (for example, 15 degrees).

That is, as shown in fig. 28 (c) and 28 (d), the front side support plate 356a and the rear side support plate 356b each have a side surface on the support rod 357 side, and in a state where the bracket 359 is merely retracted and tilted by a set angle, a projection 360 that abuts on the bracket 359 and regulates the posture is formed. The projection 360 is formed by press working in such a manner as to project from the plate surface. By tightening the bolt in a state where the bracket 359 is abutted against the boss 360 and the posture is regulated, an error in the inclination posture due to loosening of the bolt insertion hole formed in the bracket 359 is not generated.

The front side support plate 356a and the rear side support plate 356b share the same structure. That is, the bolt insertion holes for the left side and the bolt insertion holes for the right side and the boss 360 for restriction are formed, respectively, so that the front portion and the rear portion can be used in combination, and the support rod 357 can be attached even if the front-rear direction is reversed. The operation of exchanging the front and rear directions of the support rod 357 is performed in the following case, for example. That is, the threshing teeth 358 on the front side of the threshing cylinder 327 may be worn to a greater extent than the threshing teeth 358 on the rear side as the threshing process progresses.

In the threshing cylinder 327 having the above-described configuration, the threshing process can be performed with a reduced threshing load by causing the threshing object to enter the internal space of the threshing cylinder 327 from between the support rods 357.

(adapting net)

Next, the receiving net 338 will be explained.

As shown in fig. 23 and 24, the receiving net 338 is formed of 3 divided receiving nets 338A, and the 3 divided receiving nets 338A are formed by being divided into 3 substantially equally along the front-rear direction of the machine body, that is, the rotation axial direction of the threshing cylinder 327. The 3 divided receiving nets 338A are divided into a divided receiving net 338A1 on the inner side of the left side plate 331 away from the threshing chamber 329 and a divided receiving net 338A2 on the left side plate 331 close to the threshing chamber 329, respectively, in the left-right direction of the machine body, that is, in the circumferential direction of the threshing cylinder 327. That is, the receiving net 338 is divided into 6 pieces in total, and the divided receiving nets 338A can be taken out of the machine body through the opening K1C formed in the left side plate 331 of the threshing chamber 329.

As shown in fig. 25, the rear divided receiving net 338a1 has circular guide rails 361 on both front and rear sides along the circumferential direction of the threshing cylinder 327, and the rear divided receiving net 338a1 can be slid along the guide rails 361 to remove or attach the rear divided receiving net 338a 1.

The rear divided receiving net 338a1 is placed on and supported by the guide rail 361, and the end on the opening side is fastened and fixed to a supporting frame 362 by screwing with a bolt in a state where the rear end is slid to a position close to the rear intermediate frame body 337 in the threshing frame 332, and the supporting frame 362 is provided along the rotation axial center direction of the threshing cylinder 327.

As shown in fig. 25, the opening-side end of the rear divided receiving net 338a1 and the opening-side end of the divided receiving net 338a2 are connected to each other by screwing them together with bolts and are fastened to the support frame 362. As shown in fig. 29, the other end of the opening-side divided receiving net 338a2 is fastened and fixed to the intermediate frame body 337 by screwing. At the portion through which the bolt is inserted, a nut is welded and fixed to the rear divided receiving net 338a1, and the operator can perform the bolt tightening operation from the outside of the apparatus through the opening K1C.

Therefore, the receiving net 338 can be taken out to the outside of the device through the opening K1C by the screwing operation and the unscrewing operation of the bolt, or the receiving net 338 can be attached to the inside of the threshing chamber 329 from the outside. Since the receiving net 338 is divided into 6 pieces, the divided receiving net 338A is small and lightweight, and the above-described attaching and detaching operation can be easily performed.

Since the 3 divided receiving nets 338A adjacent to each other in the rotation axial direction of the threshing cylinder 327 are attached in a state where the gap in the front-rear direction is small, for example, when dust is caught in the gap, there is a problem that it is difficult to take out the divided receiving nets 338A by a manual operation. Here, as shown in fig. 30, a pushing nut 363 is attached, and the pushing nut 363 is used to push out the opening-side division receiving net 338a2 in the separating direction by a bolt BoC that is released from the screw-connection with the intermediate frame body 337 at a position where the other end portion of the opening-side division receiving net 338a2 abuts on the intermediate frame body 337 from below.

That is, the bolt BoC, from which the intermediate frame body 337 is released from the screw, is attached to the pushing nut 363 and is tightened so as to press the intermediate frame body 337 through the insertion hole 364, and a force is generated in a direction to separate the opening side division receiving net 338a2 from the intermediate frame body 337, so that the opening side division receiving net 338a2 can be detached.

(Top plate)

Next, the structure of the inner surface side of the top plate 326 will be described.

As shown in fig. 25 and 31, a fixed guide plate 365 is attached to the front end side of the machine body on the inner surface side of the top plate 326 in a fixed position, and the fixed guide plate 365 guides the processed object flowing in the rotation direction of the threshing cylinder 327 to the rear side of the machine body in accordance with the rotation of the threshing cylinder 327. As shown in fig. 31 and 32, the fixed guide plate 365 is provided with a plurality of dust feed valves 366 in a position closer to the rear side of the machine body than the fixed guide plate 365, in a state of being arranged at intervals in the front-rear direction of the machine body, and supported on the top plate 326 so as to be rotatable about the vertical axis, and the dust feed valves 366 guide the processed object flowing in the rotation direction of the threshing cylinder 327 toward the rear side of the machine body in accordance with the rotation of the threshing cylinder 327.

As shown in fig. 32, each of the dust sending valves 366 has a vertical support shaft 368 in an integrally rotatable state, the support shaft 368 penetrates the top plate 326 and is rotatably supported by a pivot support sleeve 367, and the support shaft 368 is relatively rotatably inserted through the pivot support sleeve 367 and is provided with a retaining measure. Each dust-feeding valve 366 is linked via 1 link 369 so that its end on the upstream side in the rotation direction of the threshing cylinder can be simultaneously swung about a pivot shaft 368 as a swing fulcrum.

In order to secure a storage space for storing the link 369, an expansion portion 370 is formed in the top plate 326, and the expansion portion 370 expands outward in the lateral direction on the right side of the top plate 326, which is the upstream side in the rotation direction of the threshing cylinder. The expansion portion 370 has a longitudinal plate portion 370a, a bottom surface portion 370b, and an upper surface portion 370c, and is formed to be able to receive the link 369.

As shown in fig. 31, a plurality of (3 in the present embodiment) guide members 371 supporting the link 369 so as to be slidable in the front-rear direction of the machine body are attached and fixed to the top plate 326 at appropriate intervals in the front-rear direction of the machine body. As shown in fig. 32 (b), each guide 371 is screwed and fixed to the upper surface 370c and the vertical plate 370a of the expanded portion 370 by bolts.

An operation lever 372 is attached to the support shaft 368 located second from the upstream side in the threshing process direction among the support shafts 368 so as to extend leftward from the support shaft 368, and the operation lever 372 swings integrally with the dust feed valve 366 via the support shaft 368. A pedestal 373 is provided on the left side of the top plate 326, and the pedestal 373 receives the free end side of the operating rod 372 so as to be swingable in the front-rear direction. The pedestal 373 has a fixing bolt 374 with a knob. The operation lever 372 can be fixed to any one of the 8 operation positions by the fixing bolt 374.

By operating the operating lever 372, the plurality of dust feed valves 366 can be simultaneously swung about the respective support shafts 368, and the amount of transfer of the processed object to the downstream side in the processed object transfer direction in the threshing process by the respective dust feed valves 366 can be adjusted.

Further, a reinforcing plate 375 is attached to the inner surface side of the top plate 326 so as to be positioned between the top plate 326 and the dust feed valve 366. The reinforcing plate 375 is provided only at the front half portion in the body front-rear direction, and spans the entire width or substantially the entire width in the body width direction. The reinforcing plate 375 is detachably attached to the top plate 326 in a state of being located at a position rearward of the fixed guide plate 365.

Specifically, the reinforcing plate 375 is formed by a pair of left and right divided reinforcing plates 375A and 375B, and the pair of left and right divided reinforcing plates 375A and 375B are divided left and right by a division line at a position corresponding to the expanded portion 370. The respective divided reinforcing plates 375A and 375B are formed of stainless steel plate bodies that are less likely to be worn even when they come into contact with the threshed objects, and are along the inner surface of the top plate 326.

The left divided reinforcing plate 375B is screwed and fixed to the top plate 326 by screwing together the respective turning support portions 376 of the 4 dust sending valves 366 fixed to the front side of the machine body, the bolt screwing portions located on the left side (upper surface portion side) of the 2 guide members 371 located on the front side of the machine body, and the bolt screwing portions located on the front and rear 2 portions of the left end portion of the top plate 326 screwed to the threshing frame 332.

The right divided reinforcing plate 375A is screwed and fixed to the bolt fastening portion on the right side (longitudinal portion side) of the 2 guide members 371 and the bolt screwing portion on the front and rear 2 portions of the right end of the top plate 326 screwed to the threshing frame 332. The front end of the right divided reinforcing plate 375A is fixed to the top plate 326 by bolting.

As shown in fig. 32 (B), in order to prevent the dust sending valve 366 from being unable to rotate due to friction with the split reinforcing plate 375B due to excessive tightening at the portion of the common screw-fastening support 376, a spacer 377 slightly thicker than the split reinforcing plate 375B is inserted therebetween, and the common screw-fastening is performed. The screw-on portions other than the rotation support portions 376 are only commonly screwed and fixed by bolts, and the description thereof is omitted.

As described above, the reinforcing plate 375 is fixed by screwing the bolts, and the reinforcing plate 375 can be detached by releasing the screwing of the bolts, and the reinforcing plate 375 can be attached again.

The top plate 326 is supported by the threshing frame 332 via a pivot portion 378 provided at the right end portion so as to be swingable around the machine body in the front-rear direction toward the axis X3C, and is capable of being switched between a use posture and an open posture. The use posture is a posture in which the upper side of the threshing chamber 329 is covered, and the open posture is a posture in which the upper side of the threshing chamber 329 is opened. Further, although not shown, a gas damper is provided at the rear end portion of the top plate 326, and the gas damper serves as a position holding mechanism for freely holding the position of the top plate 326 in the state of being switched to the open posture.

As shown in fig. 25, the right end and the left end of the top plate 326 have substantially the same shape, and the pivot point 378 can be attached to either the left or right side. As a result, the pivot point 378 can be attached to the left end of the top plate 326, and can be changed to a state of freely swinging about the front-rear axis of the left end.

(sorting processing section)

Next, the sorting processing section 330 will be explained.

As shown in fig. 23, the sorting unit 330 includes a swing sorting device 380, a wind turbine 381, a primary product recovery unit 382, a secondary product recovery unit 383, and the like. The swing sorting device 380 receives the processed objects that have leaked from the threshing chamber 329, and performs screening by a swing motion. The windmill 381 generates the sort wind. The primary product recovery unit 382 recovers grains (primary products). The secondary material recovery section 383 recovers secondary materials such as branched grains.

The combine harvester is provided with: a primary screw part 384 for transferring and conveying the grains recovered by the primary recovery part 382 to the outside of the right side of the threshing device 308; a slat-conveying first grain-conveying device 385 as a conveying unit for conveying grains conveyed to the outside on the right side by the primary screw 384 upward; and a second grain conveying device 386 of screw conveyor type which conveys the grain further upward from the conveying terminal of the first grain conveying device 385 and supplies the grain to the grain tank 309 (see fig. 21 and 39).

And, the combine harvester has: a secondary screw section 387 configured to transfer and convey the secondary objects collected by the secondary object collection section 383 laterally outward on the right side of the threshing device 308; and a secondary material returning device 388 for returning the secondary material conveyed to the right outside by the secondary screw section 387 to the swing sorting device 380.

As shown in fig. 21, 23, and 39, the first grain transporting device 385 is provided on the right side of the threshing device 308, and extends forward and upward in an inclined posture from a position corresponding to the primary screw part 384 to an upper part of the front side of the threshing device 308. The secondary material returning device 388 is provided at the right side portion of the threshing device 308, and extends from a position corresponding to the secondary screw section 387 to the front upper portion of the right side of the threshing device 308 in an inclined posture. That is, the first grain transporting device 385 and the second grain returning device 388 extend upward and forward in a substantially parallel posture. By arranging as described above, it is possible to reduce the size in the width direction without overlapping both in the machine body width direction, and to efficiently convey grains and secondary materials.

(swing sorting apparatus)

The swing sorting apparatus 380 includes a screen box 390, and the screen box 390 has a rectangular frame shape in plan view and swings back and forth by the operation of a crank type swing driving unit 389 provided on the lower side of the rear portion of the swing sorting apparatus 380. The screen box 390 includes a grain pan 391, a chaff screen 392, a grain screen 393, a plurality of straw screens 394 and the like, the grain pan 391 conveys the processed matter leaked from the upstream side in the processing matter conveying direction of the threshing chamber 329 to the rear, the chaff screen 392 coarsely sorts the processed matter conveyed from the grain pan 391 and the processed matter leaked from the downstream side in the processing matter conveying direction of the threshing chamber 329, the grain screen 393 finely sorts the processed matter leaked from the chaff screen 392 and lets grains (primary matter) leak to the primary matter collecting unit 382 below, and the straw screens 394 swing the discharged straw chips supplied from the threshing chamber 329 and the chaff screen 392 to the rear and let the grains fall down.

Next, the swing driving unit 389 for swing-driving the swing sorting device 380 will be described.

The swing drive unit 389 includes: a rotating shaft 395 that rotates around a horizontal axis P2C; an eccentric rocking shaft 396 having a horizontal axis eccentric with respect to the rotating shaft 395 and rotating around the axis of the rotating shaft 395; and a connecting portion 397 having one end connected to the swing sorting device 380 and the other end pivotally connected to the eccentric swing shaft 396 so as to be relatively rotatable, and connecting the swing sorting device 380 and the eccentric swing shaft 396.

That is, as shown in fig. 35, a pair of left and right rotating shafts 395 that are rotatable about the same horizontal axis P2C are supported in a state where the side walls 308A on both left and right sides of the thresher 308 are inserted. An eccentric rocking shaft 396 is provided so as to be integrally connected to the rotating shaft 395 on both the left and right sides, and the eccentric rocking shaft 396 has a horizontal axis eccentric to the rotating shaft 395 and rotates around the axis of the rotating shaft 395.

The connecting portion 397 that connects the swing sorting apparatus 380 and the eccentric swing shaft 396 includes a first connecting member 398 and a second connecting member 399, the first connecting member 398 is integrally connected to the swing sorting apparatus 380, and the second connecting member 399 is detachably connected to the first connecting member 398 with the eccentric swing shaft 396 interposed therebetween. The first linking member 398 and the second linking member 399 are separated from each other with the eccentric rocking shaft 396 interposed therebetween at a portion pivotally linked to the eccentric rocking shaft 396.

Specifically, the support brackets 400 are integrally fixed and extended rearward and downward from both right and left side portions of the screen box 390 of the swing sorting apparatus 380. The coupling portions 397 on both the left and right sides of the pair of support brackets 400 include a first coupling member 398 and a second coupling member 399, respectively.

The first coupling member 398 has a plate-shaped coupling portion 398a formed on the front side, and the plate-shaped coupling portion 398a is fastened and fixed to the support bracket 400 by bolting 3 points. A recess 398b into which a bearing 401 attached to the eccentric oscillating shaft 396 is fitted and a flange connection 398c for connecting the second connecting member 399 between the eccentric oscillating shaft 396 via the bearings 401 located on both the front and rear sides of the recess 398b are formed on the rear side of the recess 398 b.

Second coupling member 399 is provided with a recess 399a into which bearing 401 is inserted, and a flange coupling portion 399b for coupling first coupling member 398 via bearings 401 located on both the front and rear sides of recess 399a with eccentric rocking shaft 396.

The swing sorting apparatus 380 and the eccentric swing shaft 396 are coupled and coupled by fixing the flange coupling portions 398c and 399b of the first coupling member 398 and the second coupling member 399 by bolts with the eccentric swing shaft 396 interposed therebetween. As will be described later, as shown in fig. 35, the power transmission structure includes an input pulley 402 at a position on the outer side of the side wall 308A of the left rotating shaft 395 out of the right and left rotating shafts 395, and the power from the engine 310 is transmitted to the input pulley 402 to drive the rotating shafts 395. When the rotating shaft 395 rotates, the eccentric swinging shaft 396 rotates about the axial center P2C of the rotating shaft 395, and the first coupling member 398 and the second coupling member 399 reciprocate integrally in the vertical direction, thereby swinging and driving the swing sorting apparatus 380. Further, the balance weight BWC is provided on the outer side portions of the left and right side walls 308A of the left and right rotating shafts 395, respectively, and the balance weight BWC suppresses the body vibration generated by the driving of the swing sorting apparatus 380.

Next, a supporting structure of the swing sorting device 380 on the front side will be described.

As shown in fig. 33 and 34, the screen box 390 has turning rollers 403 at both right and left positions on the front side thereof, and the turning rollers 403 are supported so as to be rotatable about the lateral axis. The side walls 308A on both left and right sides of the threshing device 308 have a pair of left and right movement guide portions 404, and the pair of left and right movement guide portions 404 prevent the turning roller 403 from floating up and shifting in the left-right direction, and allow the turning roller 403 to move forward and backward.

As shown in fig. 34 (a) and 34 (d), the movement guide portion 404 includes a lower guide surface 404a and an upper guide surface 404b, and the lower guide surface 404a receives the lower end portion of the rotating roller 403 and guides the rotating roller 403 to rotate while supporting the heavy load, and the upper guide surface 404b prevents the rotating roller 403 from floating upward, so as to allow the rotating roller 403 to move forward and backward along a guide path having a backward inclined shape.

The swing sorting device 380 swings in the front-rear direction and the up-down direction by the swing motion of the swing drive unit 389 and the forward-backward movement guide of the rotating roller 403 by the movement guide unit 404, and screens the threshing processed objects while swinging the threshing processed objects backward. That is, grains are caused to leak downward, and fine dust, grass clippings, and the like are discharged rearward through the dust discharge port 405, which is an opening formed on the rear side of the machine body, by the separation air. The grass clippings and the like discharged from the dust discharge port 405 are supplied to the grass discharge processing device 312, and are discharged outside the machine body after being shredded.

Here, the support structure of the grass discharge processing device 312 will not be described in detail, and the grass discharge processing device 312 is supported at the rear so as to be swingable about the vertical axis at one end side in the machine width direction, and the rear side of the dust discharge port 405 can be opened by swinging the grass discharge processing device 312.

In a state where the connection between the first connecting member 398 and the second connecting member 399 is released, the swing sorting device 380 can be inserted into and removed from the dust discharge port 405, which is an opening on the rear side of the body of the threshing device 308.

That is, as shown in fig. 33 and 34, a pair of right and left guide rails 406 that slidably guide the swing sorting device 380 in a detachable manner are provided on the inner surfaces of the side walls 308A on the right and left sides of the threshing device 308 in a state of extending in the front-rear direction of the machine body. As shown in fig. 34 (c), the guide rail 406 has a vertical surface portion 406a welded and fixed to the side wall 308A of the threshing device 308 and a horizontal surface portion 406b extending inward in the machine body width direction from the lower end of the vertical surface portion 406a, and is formed in a substantially L-shape when viewed in the machine body front-rear direction. The swing sorting device 380 is slidably supported and guided in a state of being placed on the horizontal surface portion of the guide rail 406.

As shown in fig. 33 and fig. 34 (a), the left and right movement guide sections 404 are provided in a state of being connected to the front ends of the left and right guide rails 406, and the rotating rollers 403 supported by the movement guide sections 404 can be directly moved along the guide rails 406.

In the state where the connection between the first connecting member 398 and the second connecting member 399 is released, the operator supports the rear portion side with the hand, and can insert and remove the swing sorting device 380 from the dust discharge port 405 by sliding the left and right rotary rollers 403 in the front-rear direction of the machine body while rotating the rollers in a state where the rollers are placed on the horizontal surface portion 406b of the guide rail 406.

As shown in fig. 34 (c), the distance L1C between the right and left outer end positions of the pair of right and left guide rails 406 is formed to be larger than the width of the distance L2C between the right and left outer end positions of the turning rollers 403 on the right and left sides. The horizontal surface portions 406b of the left and right guide rails 406 are formed to be larger than the width of the rotating roller 403.

Therefore, when the swing type sorting device 380 is slid in a state where the swing type sorting device 380 is placed on the horizontal surface portion 406b of the guide rail 406, there is a margin in the left-right direction, and even if the swing type sorting device 380 is slightly inclined in the left-right direction, the rotating roller 403 is not easily detached from the guide rail 406, and a good sliding movement can be easily performed.

When the swing sorting device 380 is moved on the guide rail 406, the swing sorting device 380 is left free in the left-right direction with respect to the guide rail 406. In contrast, the movement guide portion 404 allows the front-rear movement while preventing the rotating roller 403 from floating up and shifting in the left-right direction, and therefore, there is no space in the left-right direction, and the left-right direction interval between the rotating roller 403 and the movement guide portion 404 is small.

That is, the distance between the right and left outer end positions of the pair of right and left movement guide portions 404 is substantially the same as the distance between the right and left outer end positions of the turning rollers 403 on the right and left sides, but is narrower than the distance between the right and left outer end positions of the pair of right and left guide rails.

Here, as shown in fig. 34 (b), an inclined guide portion 407 is formed at a connecting portion between the guide roller 406 and the movement guide portion 404, and the inclined guide portion 407 guides the rotating roller 403 to the movement guide portion 404 and to the inside of the threshing device 308. By forming the inclined guide portion 407 as described above, when the rotation roller 403 moves from the guide rail 406 to the movement guide portion 404, the rotation roller 403 is guided to the inside of the threshing device 308 by the inclined guide portion 407, and thus can move smoothly without being caught or jammed.

As shown in fig. 33 and 35, the first coupling member 398 is extended in a posture inclined rearward and downward from the coupling portion to the swing sorting apparatus 380, the split surface between the first coupling member 398 and the second coupling member 399 is formed in a state inclined rearward and upward with the front side positioned on the lower side and the rear side positioned on the upper side when viewed from the side of the body, and bolts for coupling these members are attached from the lower side. Therefore, the coupling position between the first coupling member 398 and the second coupling member 399 is formed to face rearward of the machine body.

In the first coupling member 398 coupled to the screen box 390, an arc-shaped recess 398b is formed in which the bearing 401 enters between the flange coupling portions 398c on both the front and rear sides, and in a state where the second coupling member 399 is not coupled, the bearing 401 is supported by the eccentric rocking shaft 396 in a state where the bearing 401 enters the recess 398 b. That is, the first connecting member 398 is locked and supported by the eccentric rocking shaft 396 so as to be able to be stopped in a state where the second connecting member 399 is not connected.

When the coupling between the swing sorting apparatus 380 and the eccentric swinging shaft 396 is released and the two are coupled again, the bearing 401 is supported by placing the recess 398b of the first coupling member 398 from obliquely above, whereby the weight on the rear side of the swing sorting apparatus 380 can be supported by the eccentric swinging shaft 396. That is, the work load can be reduced compared to the case where the weight of the swing sorting device 380 on the rear side is directly supported by the operator and the connecting work is performed.

In the case of the combine harvester, the threshing device 308 is located at a high distance from the ground, and the swing sorting device 380 is also located at a high distance from the ground in the mounted state. As a result, when the swing sorting apparatus 380 is detached outward, it may cause difficulty in performing work at that position.

Here, as shown in fig. 33, the guide rail 406 is formed in a substantially horizontal posture in a front portion 406F located closer to the front portion of the body than the swing drive unit 389, and in a rear portion 406R located closer to the rear portion of the body than the swing drive unit 389 of the guide rail 406, the guide rail is formed in a state of being inclined rearward and downward below the rear portion of the body. That is, the rear end portion of the guide rail 406 is set at a position lower than the front end portion, and the rear portion of the guide rail 406 is set at a lower position, whereby the removal operation can be easily performed.

As shown in fig. 33, a potentiometric layer thickness sensor S1C supported by the support frame 362 for the receiving net is provided at a position above the chaff screen 392 of the swing sorting apparatus 380, and the layer thickness sensor S1C is placed above the chaff screen 392 and detects the layer thickness of the conveyed threshed processed matter. When the layer thickness detected by the layer thickness sensor S1C becomes equal to or greater than a set value, the notification is performed by a not-shown notification lamp provided in the driver' S part.

(grain sieve)

The grain sieve 393 is described below.

As shown in fig. 36, the grain sieve 393 has: a rectangular corrugated steel wire mesh 408 formed with a plurality of holes for allowing grains to leak down; a holding frame 409 for holding the periphery of the corrugated wire mesh 408; and a mounting plate 410 integrally coupled to the left end of the holding frame 409 and coupled to the sieve box 390. The mounting plate 410 is detachably connected to the left side surface 390a of the screen box 390 at 3 positions by bolting.

As shown in fig. 36, a work opening 412 covered with a cover 411 that can be opened and closed is formed in a portion of the left side wall 308A of the threshing device 308 corresponding to the grain sieve 393. An access opening 413 through which the grain sieve 393 can be accessed is formed in a portion of the left side surface 390a of the sieve case 390 corresponding to the grain sieve 393, and the access opening 413 is closed by the attachment plate 410 when the grain sieve 393 is attached.

An L-shaped support table 414 is erected across the left and right side portions of the screen case 390, and the support table 414 supports the front and rear side portions of the grain screen 393 in a state of being caught by the support table 414. The grain sieve 393 can slide in the right-left direction while being supported by the support bases 414 on both the front and rear sides.

In addition, in a state where the working opening 412 is opened, the screwing of the mounting plate 410 to the sieve box 390 by 3 bolts is released, and the grain sieve 393 is slidably moved in a state of being stopped and supported by the support bases 414 on both the front and rear sides, so that the grain sieve 393 can be pulled out laterally outward from the access opening 413. Further, the grain sieve 393 can be attached to an appropriate position in the sieve box 390 by sliding it from the outer side to the inner side of the sieve box 390.

An attachment nut 415 in a fixed state is provided on an outer surface of the attachment plate 410, and the nut 415 temporarily holds the removed bolt BoC. The bolt BoC screwed into the nut 415 can be used as a holding operation portion for sliding the grain sieve 393.

A pair of front and rear pressing members 416 are provided, and the pair of front and rear pressing members 416 suppresses floating of the inner end of the grain sieve 393 when the grain sieve 393 moves to an appropriate position in the sieve box 390. As shown in fig. 37, the pressing member 416 is formed by bending a band-shaped plate spring, and one end in the longitudinal direction thereof is inserted through a slit CC formed in the right side surface portion 390a of the screen box 390. The pressing portion 416a formed on the other end side in the longitudinal direction is pressed downward, and the middle portion in the longitudinal direction is screwed and fixed to the side surface portion 390a by 1 bolt BoC.

When the kernel screen 393 moves to an appropriate position, the pressing portion 416a is formed in a concave curved shape in which the middle portion protrudes downward so that the end portion of the kernel screen 393 comes into contact with and is lifted upward and guided.

Therefore, as the grain sieve 393 is moved to an appropriate position, the inner end of the grain sieve 393 is pressed by the pressing portion 416a, floating up is suppressed, and when the grain sieve 393 is pulled out laterally outward, the grain sieve 393 can be pulled out directly against the pressing force of the pressing portion 416 a.

As shown in fig. 37, a lower grain tray 417 is provided on the front side of the front support 414, and the lower grain tray 417 transfers the processed object, which is large in grass clippings and has leaked from the front end of the chaff screen 392, rearward. Further, a slide adjusting plate 418 for freely changing and adjusting the area under the drain of the kernel screen 393 is provided below the front support 414. The slide adjustment plate 418 is screwed and fixed by a plurality of bolts BoC integrally fixed to a lower portion of the front support 414, and bolt insertion holes are formed as long holes that are long in the front-rear direction. Therefore, the position can be changed by adjusting the position in the front-rear direction and tightening the bolt BoC.

By changing the front and rear positions, the area under the grain sieve 393 can be changed.

As shown in fig. 23, 3 wind direction guides 419 are provided below the swing sorting device 380, and the 3 wind direction guides 419 guide the wind direction distribution of the sorting wind supplied from the wind turbine to: an air path mainly facing the chaff screen 392; an air path mainly facing the grain sieve 393; and an air passage facing the primary collection unit 382.

As shown in fig. 37, a lower side grain tray 417 and a slide adjusting plate 418 in a state of being slidably moved to the front side of the body are provided in a state of being located in a region where the sorting wind is not supplied by the guide of the wind direction guide 419. As a result, the lower grain pan 417 and the slide regulating plate 418 do not obstruct the flow of the classifying air, and the classifying air can be effectively supplied to a desired portion.

As shown in fig. 23 and 38, a baffle plate 420 having a substantially L-shape in a side view is provided above the secondary material collecting section 383. The baffle plate 420 guides the processed matter discharged from the rear end of the grain sieve 393 such that the processed matter located on the front side flows down to the primary matter collecting unit 382 and the processed matter located on the rear side flows down to the secondary matter collecting unit 383.

The baffle 420 is connected to the screen box 390 so as to be freely changed in the front and rear positions.

That is, as shown in fig. 38, the coupling bracket 421 formed in a groove shape as viewed in the front-rear direction is screwed and fixed to the screen box 390 at both right and left side portions by bolts, and the baffle plate 420 is coupled to the coupling bracket 421 by screwing a plurality of portions by bolts.

The coupling brackets 421 are fixed to the left and right sides of the screen box 390 by bolting 2 front and rear portions, respectively. The screen box 390 is formed with 3 attachment holes 422 spaced at equal intervals in the front-rear direction. Here, by switching between a state in which the coupling bracket 421 is coupled by the front 2 mounting holes 422 among the 3 mounting holes 422 on the screen box 390 side and a state in which the coupling bracket 421 is coupled by the rear 2 mounting holes among the 3 mounting holes 422, the front and rear positions of the baffle plate 420 can be largely switched between 2 positions.

The bolt insertion holes 423 of the baffle 420 are formed as long holes in the front-rear direction, so that the front-rear position of the baffle 420 relative to the coupling bracket 421 can be adjusted and the front-rear position of the baffle 420 can be finely adjusted.

A guide body 424 made of a soft material such as canvas is provided on the primary product collecting portion side of the deflector 420 in a state of being screwed together by a bolt, and the guide body 424 guides grains to flow down toward the primary product collecting portion 382. Even if the swing sorting device 380 swings, a gap is not formed between the guide body 424 and the primary collection unit 382, and grains can be guided to flow down.

(first grain-carrying device)

Next, the first grain transporting device 385 will be explained.

As shown in fig. 41, the primary screw 384 is provided to extend and project laterally outward through an opening formed in the right side wall 308A of the threshing device 308, and the rotary shaft 425 of the primary screw 384 serves as a drive shaft positioned at one end side in the conveying direction of the first grain conveying device 385.

As shown in fig. 40, the first grain handling device 385 includes: a rotation shaft 425 of the primary screw 384 as a drive shaft; a driven shaft 426 positioned on the other end side in the conveying direction; a circular rotating chain 247 as 1 circular rotating body wound and tensioned between the center parts of these shafts in the axial direction; a plurality of locking conveyance bodies 428 in a flat plate shape attached to the endless rotating chain 427 with a predetermined interval; and a carrier 429 covering the periphery of these components. As will be described later, as shown in fig. 54, the power from the engine 310 is transmitted via the input pulley 430, and the input pulley 430 is provided at the left end portion of the rotary shaft 425 of the primary screw 384.

As shown in fig. 40, the entire carrying box 429 supporting the first grain carrying device 385 is fixed to the side wall 308A of the threshing device 308 via the mounting bracket 590 at 2 positions, i.e., the middle portion and the upper side portion in the vertical direction. The mounting brackets 590 on both upper and lower sides can share the same components.

As shown in fig. 41 (b), the connection box 431 covers the extension protrusion of the primary screw 384, and connects the side wall 308A of the threshing device 308 and the carrying box 429, and the connection box 431 and the carrying box 429 are formed separately. In the connecting box 431, an inner flange 431A, an outer flange 431B, and a cylindrical portion 431C connecting the inner flange 431A and the outer flange 431B are integrally connected. The inner flange 431A is bolted to the sidewall 308A of the threshing device 308, and the outer flange 431B is bolted to the side surface of the conveyance case 429.

As shown in fig. 40, the driven shaft 426 includes a guide support rod 432 extending in the direction of tensioning the endless rotating chain 427 and a tension applying mechanism 433 for applying tension to the endless rotating chain 427 via the support rod 432 at both axial end portions thereof.

A bearing 434 serving as a bearing portion for rotatably supporting the driven shaft 426 is integrally coupled to the support rod 432, and is supported by the conveyance case 429 so as to be slidable in the direction in which the endless rotating chain 427 is tensioned. The tension applying mechanism 433 applies tension to the endless rotating chain 427 by sliding the bearing portion (bearing 434) via the support rod 432.

Specifically, as shown in fig. 44, the plate-like holding members 436 are supported by a pair of front and rear slide guide members 437 coupled and fixed to the conveyance case 429 so as to be slidable along the extending direction of the endless revolving chain 427 on both axial end portions of the driven shaft 426. The plate-like holding member 436 has a bearing holding portion 435 for holding the bearing 434.

The support rod 432 is set in a state in which a horizontal surface part 436a at the upper end of the plate-like holding member 436 is inserted upward from below by a bolt having a hexagonal head part 432a and a screw part 432b, the head part 432a is positioned below the horizontal surface part 436a, and the screw part 432b is projected upward from the horizontal surface part 436 a.

The support rod 432 is inserted through a bracket 438 for a spring mount fixed to the conveyance case 429, and a coil spring 439 is externally fitted to the support rod 432 on the upper side of the bracket 438. Also, a spring seat member 440 is provided to block an upper side of the support coil spring 439. Further, 2 nuts 441 supported by being held in a blocking manner on the upper side of the spring seat member 440 are screwed to the support rod 432.

In a state where the nut 441 is screwed, the coil spring 439 is compressed from a free state, and acts to move the support rod 432 upward. Further, a cylindrical body 442 is provided on the outer peripheral side of the coil spring 439, and the urging force of the coil spring 439 can be set to an appropriate value by always maintaining a predetermined interval between the bracket 438 and the spring seat 440 by the cylindrical body 442. The tension applying mechanism 433 is configured as described above.

That is, the left and right tension applying mechanisms 433 move and bias the support rod 432 upward by the biasing force of the left and right coil springs 439, which are adjusted to appropriate values and are substantially uniform. Therefore, the driven shaft 426 is biased upward by the biasing force of the coil springs 439 that are substantially uniform in the left and right directions, and tension is applied to the endless rotating chain 427.

The plate-like holding member 436 has a pair of ribs 443 in a fixed state at a portion where the horizontal plane portion 436a is formed, and the pair of ribs 443 not only increase the strength of the plate-like holding member 436 but also act on the head portion 432a of the support rod 432 to prevent free rotation.

The head 432a of the support rod 432 is hexagonal, and the pair of ribs 443 are formed in a state of abutting against the opposing faces of the hexagonal shape. Further, by fitting the head portion 432a of the support rod 432 between the pair of ribs 443, the support rod 432 can be prevented from rotating by a function of a wrench. As a result, the change in the biasing force of the coil spring 439 due to the rotation of the support rod 432 can be prevented.

The pair of left and right support rods 432 are formed with extension convex portions 432c, respectively, and the extension convex portions 432c extend outward in the tension direction from the end of the driven shaft 426 of the conveyance case 429 along the tension direction of the endless rotating chain 427. A coupling member 444 is provided, and the coupling member 444 spans and couples the extension projections 432c of the pair of support rods 432 to each other, thereby coupling the pair of support rods 432 to each other.

That is, a coupling member 444 made of a band plate is bridged and coupled to a portion closer to the axial end side than the 2 nuts 441 for stopper support of each of the pair of support rods 432, and the coupling member 444 is fastened and fixed to each of the support rods 432 by a nut 445.

As shown in fig. 43 and 44, the driven shaft 426 has an output pulley 446 as an output rotating body at an end portion thereof projecting to the outside on the right side of the conveyance case 429, and the output pulley 446 is used to transmit the transmitted power to a second grain conveyance device 386 as another device. Power from the output pulley 446 is transmitted via a drive belt 447 to a transverse input shaft 448 and from the transverse input shaft 448 to a second grain handling device 386 via a bevel gear mechanism 449.

As shown in fig. 40 and 41 (a), in the first grain transporting device 385, a rotation downstream side portion of the endless rotating chain 427 on the rotation downstream side of the portion wound around the drive sprocket 450 is located above a rotation upstream side portion located on the rotation upstream side, and a processed object transporting path LC is formed at a portion located on the rotation downstream side portion, and a bottom guide plate extending over the entire width of the processed object transporting path LC in the width direction extends along the inner peripheral side of the endless rotating chain 427 on the processed object transporting path LC, and extends over substantially the entire length of the processed object transporting path LC. That is, the bottom guide plate 451A of the intermediate portion provided long along the linear path, the bottom guide plate 451B on the upstream side of the conveyance upstream side, and the bottom guide plate 451C on the downstream side of the conveyance downstream side are provided, and the transfer guide is performed by receiving the processed object from the lower side by the pushing of the locking conveyance body 428.

In fig. 40 and 41 (a), the endless revolving chain 427 is driven to rotate rightward, and the grains carried by the primary screw 384 are raked up by the locking carrier 428 attached to the endless revolving chain 427 while being rotated rightward, and are sequentially carried through the processed object carrying path LC located on the downstream side of the rotation.

As shown in fig. 41 (a) and 41 (B), the end portion of the upstream-side bottom guide plate 451B on the drive sprocket 450 side is formed to extend so as to surround the outer periphery of the rotary shaft 425. The upstream bottom guide plate 451B is fixedly supported by the left and right side surfaces of the conveyance case 429 by being screwed with bolts by an L-shaped coupling 452 integrally coupled to the upper portion. A notch 453 for avoiding the drive sprocket 450 is formed at the end on the drive sprocket 450 side, and both side portions of the notch 453 are formed to extend so as to surround the outer periphery of the rotating shaft 425.

As shown in fig. 41 (b) and 44 (b), a bulging portion 455 is formed at a meshing portion of the drive sprocket 450 with the endless rotating chain 427, and the bulging portion 455 bulges in a width direction orthogonal to a winding direction of the endless rotating chain 427.

The bulging portion 455 is formed with a lateral side portion of the engagement protrusion 456 which is a chain engagement portion of the drive sprocket 450 in a state of bulging outward in the width direction in a substantially circular arc shape when viewed in the front-rear direction, and a gap in the width direction between the chain 427a and the engagement protrusion 456 on both right and left sides of the endless revolving chain 427 is reduced. By forming as described above, it is possible to smoothly mesh with the endless rotating chain 427 and reduce the risk of grain getting caught between the drive sprocket 450 and the endless rotating chain 427.

The carrier box 429 is provided with a plurality of openings for performing maintenance work such as internal cleaning and inspection, and each opening is covered with a cover body that can be opened and closed freely.

As shown in fig. 41, a large opening K2C extending along the arc-shaped outer peripheral portion of the drive sprocket 450 to almost a half circumference is formed at the conveyance start end portion of the conveyance case 429. The bottom cover 457 covering the opening K2C is formed in a substantially arc shape along the carrying case 429 having an arc shape in a side view, and both side end portions thereof are held by the lock mechanisms 458 of a known structure, respectively.

As shown in fig. 42, a rectangular opening K3C is formed in a linear intermediate path portion of the processed object conveyance path LC of the conveyance box 429. The middle portion cover 459 covering the opening K3C has an upper side end portion separated into an inner portion 459b and outer portions 459c located on both sides of the inner portion 459b by a pair of left and right notches 459a, the inner portion 459b is inserted into the inner side of the upper side edge portion of the opening K3C, and the outer portions 459c are inserted and engaged in a state located outside the upper side edge portion of the opening K3C. On the other hand, a vertical surface 459d bent in an L shape is formed at a lower side end portion, and the vertical surface 459d is screwed to an L-shaped bracket 460 fixed to an outer surface of the tote box 429 by a bolt 461 with a knob.

At the conveyance terminal end of the conveyance box 429, an opening K4C is formed in a rear side region of the arc-shaped outer peripheral portion of the driven sprocket 454, an upper end side portion of the upper cover 462 covering the opening K4C is engaged and held by an engaging member 463 fixed to the conveyance box 429, and a lower end side portion is held by a lock mechanism 458 of a known structure.

As shown in fig. 45, the locking member 463 is formed by bending a plate into a substantially L-shape when viewed from the side, and has an opening 463a formed in one surface of the bent portion. Notches 463b are formed on both sides of an edge portion of the other surface of the curved portion corresponding to the opening 463. A locking portion 462a that enters and engages with the opening 463a is formed in a slightly upwardly bent state at an upper end side portion of the upper cover body 462. Then, the upper cover 462 is attached in a fixed state by holding the lower end side portion by the lock mechanism 458 in a state where the locking portion 462a is inserted into the opening 463a and locked to the edge portion.

An opening K5C is formed in the lateral side surface of the relay box 464 for feeding grains from the conveying end portion of the conveying box 429 to the second grain conveying device 386, a relay cover 465 covering the opening K5C is separated into an inner portion 465b and outer portions 465c positioned on both sides of the inner portion 465b by a pair of left and right notches 465a, the inner portion 465b enters the inside of the edge portion on the upper side of the opening K5C, and the outer portions 465c are inserted and engaged in a state positioned outside the edge portion on the lower side of the opening K5C, similarly to the intermediate cover 459. On the other hand, a vertical surface 465d bent into an L-shape is formed at the upper side end portion, and the vertical surface 465d is screwed to an L-shaped bracket 466 fixed to the outer surface of the conveyance case 429 by a bolt 467 with a knob.

When the primary screw 384 is removed from the threshing device 308 for maintenance work, the primary screw 384 can be pulled out to the left outside of the machine body by switching the fuel tank 311 to the open position. Hereinafter, not shown, the left end of the primary screw 384 is supported only by the side wall of the threshing device 308 via a bearing, and the primary screw 384 can be easily removed by removing the bearing holder.

As shown in fig. 41 (b), the right end of the rotary shaft 425 of the primary screw 384 is supported by the conveyance case 429 via a bearing 468. The bearing holder 468A holding the bearing 468 has a simple structure in which holding unit bodies having a shallow drawing shape having the same shape are screwed to both the left and right sides by bolts. Further, at the fitting portion of the rotary shaft 425 with respect to the bearing 468, the fitting tolerance is set to JS tolerance level (both positive and negative tolerances), and the rotary shaft 425 can be pulled out by using a tool such as a gear puller.

(second grain-carrying device)

As shown in fig. 39, the second grain transporting device 386 is set in an inclined posture extending from the transporting terminal end of the first grain transporting device 385 to the left upper side through the gap between the threshing device 308 and the cab. The second grain conveying device 386 includes a conveying section 469 of a screw conveyor type and a discharging section 470, the conveying section 469 conveys grains obliquely upward to the left, and the discharging section 470 is located at a conveying end section of the conveying section 469 and discharges and supplies the grains into the grain box 309.

In the second grain transporting device 386, the transporting unit 469 includes a transporting screw 472 rotatably in an integrally formed cylindrical case 471, and grains are transported obliquely upward in accordance with the rotation of the transporting screw 472.

The discharge unit 470 has an opening for discharging in a discharge box 473 provided in a state of being connected to the outer box 471, and has a rotary blade 475 that rotates integrally with the conveying screw 472 in the discharge box 473, and the grain that has been conveyed is discharged and supplied into the grain box 309 while being ejected by the rotary blade 475.

The second grain conveying device 386 has a rotation speed sensor S2C at the conveying terminal end, and the rotation speed sensor S2C detects the rotation speed of the conveying screw 472, and when the rotation speed detected by the rotation speed sensor S2C falls below a set speed, the notification is given by a not-shown notification lamp provided in the driver 307.

(secondary object returning device)

Next, the secondary product returning device 388 will be explained.

As shown in fig. 47 and 48, the secondary product returning device 388 includes: a conveying unit 476 of a screw belt type for conveying the secondary object from a position corresponding to the secondary screw section 387 to a discharge position on the front upper side; a supply part 477 that transfers the secondary object conveyed by the secondary screw part 387 to the conveying part 476; a discharge unit 478 which is located at the conveying terminal end of the conveying unit 476 and discharges and supplies the secondary material to the swing sorting device 380 of the threshing device 308; the transmission mechanism 479 for conveying the secondary object transmits the power of the secondary screw 387 to the conveying part 476. As will be described later, as shown in fig. 48, the power from the engine 310 is transmitted via an input pulley 481 provided at the left end of the rotary shaft 480 of the secondary screw 387.

The conveying section 476 has a conveying screw 483 rotatably inside a cylindrical case 482 having a two-part structure, and conveys grain obliquely upward in accordance with the rotation of the conveying screw 483. The supply part 477 includes a rotary blade 484 and a supply tank 485, the rotary blade 484 is attached to a rotary shaft 480 of a secondary screw part 387, the secondary screw part 387 is projected to extend outward in the lateral direction through an opening of a side wall 308A formed on the left side of the threshing device 308, the supply tank 485 covers the outer peripheral part of the rotary blade 484 and supplies the secondary material to the carrying part 476.

The supply tank 485 has a first tank section 485A and a second tank section 485B that are integrally connected, the first tank section 485A is approximately arc-shaped when viewed from the side along the outer peripheral portion of the rotor blade 484, and the second tank section 485B guides the secondary object that is ejected by the rotor blade 484 obliquely downward toward the front side and covers the conveyance start end of the conveyance screw 483.

Here, although not shown, the second case section 485B is formed in an arc shape along the outer peripheral portion of the conveying screw 483 at the downstream side in the secondary article bounce direction, and the second case section 485B and the cylindrical case 482 of the conveying section 476 are connected to each other in a smoothly continuous state, whereby the conveying function of the conveying screw 483 can be exhibited well.

As shown in fig. 47 (a), the width of the second tank section 485B in the conveying direction of the conveying screw 483 is formed to be substantially the same as the diameter of the first tank section 485A when viewed from the side. As a result, the secondary material can be smoothly conveyed from the rotary blade 484 to the conveying unit 476 with a small amount of the remaining material.

As shown in fig. 47 (a), a maintenance opening K6C extending in a range of about 90 degrees in the circumferential direction is formed in a lower portion side portion of a downstream side portion in the direction in which the rotor blade 484 of the second tank portion 485B ejects the secondary object. This portion is likely to cause clogging with secondary materials being transported.

As shown in fig. 47 (a), the lower cover 486 covering the opening K6C for maintenance is formed in an arc shape along the second tank section 485B, and flange parts 486a protruding in the radial direction are formed on both side parts in the circumferential direction. The lower cover 486 is fixedly attached to the supply tank 485 by screwing the flange 486a and the flange 485B1 provided on the second tank 485B with the wing bolts 487. By operating the wing bolts 487, the lower cover 486 can be easily attached and detached.

As shown in fig. 47 (a) and 49, the discharge section 478 has a discharge box 488 in a state of being connected to the cylindrical box 482 of the conveying section 476, an opening 489 for discharge is formed in a body inner side portion of the discharge box 488, and a rotary blade 490 rotating integrally with the conveying screw 483 is provided in the discharge box 488.

A maintenance opening K7C is formed in a portion of the discharge box 488 on the opposite side (outside the machine body) to the discharge opening 489. The upper cover 491 covering the opening K7C is formed in an arc shape so as to allow the rotation of the rotary blade 490, and is attached to the front and rear sides by screwing with bolts.

As shown in fig. 49, the discharge opening 489 has a guide plate 492, and the guide plate 492 discharges the secondary objects ejected by the rotary blade 490 in a direction as close to the front side of the body as possible at a position above the swing sorting device 380. The guide plate 492 is formed by bending a single band plate into an arc shape, abuts against the inner wall surface of the discharge opening 489 inside the discharge case 488, is screwed to the inner wall surface by a bolt at the middle portion, and is fixed in a state of being screwed together by the mounting bolt BoC of the upper cover 491.

Next, the transmission mechanism 479 for conveying the secondary object will be described.

As shown in fig. 47 and 48, a portion of the rotary shaft 480 of the secondary screw section 387, which is located outward of the mounting position of the rotary blade 484, protrudes outward from the first case section 485A, and the drive sprocket 493 is integrally and freely rotatably provided in the outward protruding portion. A gear case 496 for housing a bevel gear is provided below the bottom surface of the second case section 485B, the bevel gear is operatively connected to a lateral drive shaft 495, which projects outward from the gear case 496 in the lateral direction, and a carrying screw 483.

A transmission chain 498 is provided, and the transmission chain 498 is interlockingly coupled to a driven sprocket 497 and a driving sprocket 493 mounted on a transverse transmission shaft 495. The drive sprocket 493, the drive chain 498, the driven sprocket 497, and the like are housed in a chain case 499 on the outer belt.

A drive-side shaft support portion of chain case 499 that supports secondary screw portion 387 of rotary shaft 480 is externally fitted to rotary shaft 480 in a state where bearing 501 is prevented from coming off, and is fastened and fixed to the shaft end of rotary shaft 480 by bolt BoC in a state where drive sprocket 493 is integrally and rotatably attached by key coupling. The driving-side shaft support is fixed to a detachable lateral wall 503 of the first case portion 485A by bolting. The lateral side wall 503 is detachably fixed to the peripheral edge of an opening 505 formed in the side of the first tank section 485A at 4 positions by butterfly bolts 504.

A driven sprocket 497 is fitted into a shaft support portion of the chain case 499 on the driven side for supporting the transverse transmission shaft 495 through a bearing 506, and the driven sprocket 497 is spline-fitted to the transverse transmission shaft 495. Therefore, when the coupling of the chain case 499 and the first case portion 485A is released, the driven-side shaft support portion can be pulled out from the lateral transmission shaft 494.

A plate spring 507 is provided as a tension applying member for applying tension to the drive chain 498 tightly set in the chain case 499. As shown in fig. 47, the plate spring 507 is curved so that its central portion protrudes inward, and both side end portions are supported by the chain case 499. The plate spring 507 has a fixed support pin 508 at one end and the other end in contact with the inner surface of the case.

In the case of the chain case 499, the separate cases 499a, 499b having a two-piece structure are flange-coupled to each other. Further, a support pin 508 provided at one end of the leaf spring 507 is inserted into a recess 509 formed in one of the divided cases 499a, and when the chain cases 499 are flange-connected, the support pin 508 is held by the chain cases 499, thereby holding the leaf spring 507. That is, the posture in which tension is applied to the drive chain 498 can be maintained.

A rotation support portion of the fuel tank 311 is provided on the left outside of the secondary screw section 387, and when the secondary screw section 387 is removed from the thresher 308 for maintenance work, it is removed to the right of the machine body.

When the secondary screw section 387 is removed, first, the fixing bolt is loosened at the left end of the rotary shaft 480 of the secondary screw section 387, and the input pulley 481 is removed. Then, the coupling with the first case section 485A is released at the drive-side shaft support section of the chain case 499. That is, the 4 wing bolts 504 are removed, and the lateral side wall 503 of the driving-side shaft support portion to which the chain case 499 is fixed is removed from the peripheral edge portion of the first case portion 485A. Accordingly, the driven-side shaft support portion of the chain case 499 can be removed from the lateral transmission shaft 494, and the chain case 499 and the rotary shaft 480 of the secondary screw 387 can be removed integrally to the right outside of the threshing device 308.

A rotational speed sensor S3C for detecting the rotational speed of the conveying screw 483 is provided at the conveying terminal end of the secondary product return device 388, and when the rotational speed detected by the rotational speed sensor S3C becomes equal to or lower than a set speed, a notification lamp, not shown, provided in the driver 307 is used to notify.

(windmill)

Next, the wind turbine 381 will be described.

As shown in fig. 50 (a), the wind turbine 381 has a rotating shaft 510 extending across the left and right side walls 308A of the thresher 308 and penetrating the left and right side walls 308A, and has a plurality of rotating blades 511 in an integrally rotating state on the outer peripheral portion of the rotating shaft 510. That is, a cylindrical member 512 fitted to the rotary shaft 510 so as to be relatively rotatable is integrally fixed by a screw 513, and a substantially disc-shaped rotary body 514 integrally provided to the cylindrical member 512 is bolted to each of the plurality of rotary blades 511 via a connecting plate 515. Therefore, when the rotary blade 511 is damaged, only the damaged rotary blade 511 can be removed and replaced, and when the rotary shaft 510 is damaged, only the rotary shaft 510 can be replaced by removing the cylindrical member 512.

As shown in fig. 50 (b) and 50 (c), air intake openings 516 for taking in the sorted air are formed in the left and right side walls 308A, respectively. The air intake opening 516 is an opening having substantially the same size as the circular rotation locus of the outer end of the rotary blade 511. The wind turbine 381 sucks in the sorted air from the outside through the left and right air suction openings 516 as the rotary blades 511 rotate, and blows the sucked sorted air in the tangential direction of the rotation locus of the rotary blades 511, that is, toward the sorting processing unit 330.

Further, a pair of left and right plate-shaped opening degree adjusting plates 517 are provided to be able to change and adjust the opening degrees of the left and right intake openings 516.

As shown in fig. 51 and 52, each opening degree adjustment plate 517 is provided so as to face the intake opening 516 and so as to extend over an upper portion and a lower portion of the intake opening 516 of the side wall 308A. Specifically, each aperture adjustment plate 517 is formed in a vertically long elongated shape so as to cover an area on the front side of the body of the intake opening 516, and so as to extend over an upper portion 518 located above the intake opening 516 of the side wall 308A and a lower portion 519 located below the intake opening 516 of the side wall 308A.

The pair of left and right opening adjustment plates 517 are supported to be swingable by a swing support shaft 520 continuously connected in the machine width direction, and are swingably pivoted about an axial center P3C of the swing support shaft 520 in the machine lateral direction, whereby the opening of the air intake opening 516 can be adjusted.

The swing support shaft 520 is inserted through the front side of the threshing mechanism 308 in the lateral direction along the machine body, and is supported by the front surface 332a of the threshing frame 332 as the front side frame of the threshing mechanism 308. That is, the swing support shaft 520 has its left and right ends screwed to the opening adjusting plates 517 on the left and right sides by bolts, and is supported by a pair of left and right bearing members 521 provided on the front surface 332a of the threshing frame 332 so as to be rotatable about the horizontal axis P3C.

As shown in fig. 51 (a) and 52 (a), a linking link 522 as a connecting member is integrally bridged across a pair of left and right opening degree adjustment plates 517 at a position different from the swing support shaft 520, that is, a middle swing position of the opening degree adjustment plate 517 and a position closer to the front side than the front surface 332a of the threshing frame 332. The opening degree can be adjusted by interlocking the pair of left and right opening degree adjustment plates 517 by the interlocking link 522. Therefore, the interlocking link 522 corresponds to an interlocking mechanism for interlocking the pair of opening degree adjustment plates 517 to adjust the opening degree.

As shown in fig. 51, a wing bolt 523 serving as an opening degree holding portion is provided at a position corresponding to the left side wall 308A, and the wing bolt 523 holds the opening degree of the air intake opening 516 adjusted by the opening degree adjustment plate 517. An arc-shaped elongated hole 524 along the pivot axis is formed in the opening adjusting plate 517 at the upper and lower intermediate portions, a screw attaching portion 525 is formed at a portion corresponding to the elongated hole 524 of the threshing frame 332, and a butterfly bolt 523 is attached in a state of being inserted through the elongated hole 524. When the thumb bolt 523 is tightened, the opening degree adjustment plate 517 can be fixed in position, and when the thumb bolt 523 is loosened, the opening degree adjustment plate 517 can be swung within the range of the long hole 524 by manual operation to change the opening degree.

When the opening degree is adjusted, the right opening degree adjustment plate 517 is also operated to swing via the interlocking link 522, and an arc-shaped elongated hole 524 similar to the left opening degree adjustment plate 517 is formed in the right opening degree adjustment plate 517, and a bolt 526 for restricting the swing range is provided in a state where the elongated hole 524 is inserted. However, the bolt 526 is not tightened, and the bolt 526 has mobility.

When the maintenance work of the threshing device 308 is performed, the work can be performed from the outside of the left side of the machine body in a state where the fuel tank 311 is swung open around the vertical movement axis, and the air volume of the wind turbine 381 can be adjusted from the left side of the machine body.

As shown in fig. 51 and 52, a closing member 527 is provided to close a gap between the side wall 308A of the threshing device 308 and the opening degree adjusting plate 517. An upper portion 518 of the closing member 527 located above the air intake opening 516 of the side wall 308A and a lower portion 519 located below the air intake opening 516 of the side wall 308A are attached to the side wall 308A, respectively.

The closing member 527 is formed of an L-shaped plate member when viewed in the front-rear direction, and is integrally fixed to the side wall 308A. Further, by maintaining the state in which the tip end side is brought close to the inner surface side of the opening degree adjustment plate 517 over the entire range in which the opening degree adjustment plate 517 can swing, suction of the sort air from the gap between the opening degree adjustment plate 517 and the side wall 308A does not occur.

An operation portion 528 for changing the opening degree of the opening degree adjustment plate 517 is provided at a position corresponding to the left side wall 308A, which is the outer side wall facing the outside in the lateral direction of the machine body. Specifically, the longitudinal edge portion of the aperture adjustment plate on the front side is bent into a substantially L-shape to form a coupling portion for coupling the swing support shaft 520 and the link 522, and the bent portion is provided across the entire longitudinal region of the edge portion to form the operation portion 528. The opening adjustment plate 517 can be operated to swing by holding the operation portion 528 with a hand. In the drawings other than fig. 51 and 52, the opening degree adjustment plate 517 is not shown.

As shown in fig. 50, in order to support the rotary shaft 510 of the wind turbine 381 on the left and right side walls 308A where the air intake opening 516 is formed, the rotary shaft 510 is rotatably supported by a bearing bracket 529 which is supported so as to span the air intake opening 516 in the front-rear direction.

The left bearing bracket 529 is screwed and fixed by a bolt in a state of coming into contact with the threshing frame 332 from the left side of the machine body. The right bearing bracket 529 is screwed by bolts to the front and rear connecting members 530 fixed to the front and rear sides of the air intake opening 516 in a state of being abutted from the left side of the body, and fixed to the front and rear of the threshing frame 332. The width of the right bearing bracket 529 in the longitudinal direction (front-rear direction) is formed to be slightly smaller than the width of the air intake opening 516.

The power from the engine 310 is transmitted by an input pulley 531 provided at the right end of the rotating shaft 510 of the wind turbine 381. As described below, the power is transmitted to each part of the threshing device 308 via an output pulley 532 provided at the left end of the rotating shaft 510. Reference numeral 533 in fig. 50 denotes a tension pulley acting on the output belt 534, and the tension pulley 533 is supported by the tension arm 535, and the tension arm 535 doubles as the pivot shaft 510.

When the wind turbine 381 is removed from the thresher 308 for maintenance work, it is removed from the left of the machine body. That is, when the windmill 381 is removed, the bolt fastening of the left bearing bracket 529 to the threshing frame 332 is released. At this time, the tension arm 535 is detached in advance. Then, the input pulley 531 provided on the rotary shaft 510 is removed, and the bolt engagement of the right-side bearing bracket 529 with the front and rear-side coupling members 530 is released. Thus, the wind turbine 381 can be detached from the left outside of the thresher 308 with the entire wind turbine 381 connected integrally to the left and right bearing brackets 529.

(switch member)

As shown in fig. 23 and 53, a switch member 537 is provided, and the switch member 537 is configured to freely open and close a dust discharge port 405 as an external discharge path on the upper side of the rear portion of the body of the swing sorting apparatus 380. Further, a processed object amount detection body 538 is provided as a processed object amount detection means, and the processed object amount detection body 538 detects the amount of threshed processed objects leaking from the receiving net 338. The opening and closing member 537 changes and adjusts the opening degree according to the amount of the threshed processed matter detected by the processed matter amount detection body. Specifically, the larger the amount of the threshed material, the more the dust discharge port 405 is opened.

The processed matter amount detector 538 is provided at the rear end of the receiving net 338, and detects the amount of the external threshed and processed discharged matter discharged from the threshing chamber 329 by the swing displacement. That is, the processed object amount detector 538 is provided across almost the entire width in the width direction of the thresher 308 formed in a long strip plate shape in the machine body lateral direction. The processed object amount detection body 538 is supported so as to be vertically swingable about a lateral axis P4C on the front side of the machine body, is biased upward in a normal posture toward the upper side, and is vertically swingably displaced downward against the upward biasing action by the weight of the discharged material discharged from the threshing chamber 329.

The opening and closing member 537 is supported by the support frame 362A of the receiving net 338 so as to be vertically swingable about the lateral axis P5C above the rear end portion of the swing sorting apparatus 380. The opening and closing member 537 is provided across substantially the entire width in the width direction of the threshing device 308 having a long belt plate shape in the transverse direction of the machine body, similarly to the processed matter amount detector 538.

The following describes a support structure of the treatment substance amount detector 538 and the switch member 537.

As shown in fig. 53, the plurality of pivot support members 540 are attached to a support frame 362A fixed to the rear side of the receiving net 338 by bolting via a support base 362A1 in a state of being disposed at appropriate intervals in the width direction of the threshing device 308. A pivot support sleeve portion 541 formed by bending the upper and lower sides of the plate member into an arc shape is formed in the pivot support member 540.

A pivot support pin 542 integrally fixed to the treatment amount detector 538 is inserted into the upper pivot support sleeve 541, and the treatment amount detector 538 is supported so as to be vertically swingable about an axial center P4C of the pivot support pin 542. A pivot support pin 543 integrally fixed to the switch member 537 is inserted into the lower pivot support sleeve portion 541, and the switch member 537 is supported so as to be vertically swingable about an axial center P5C of the pivot support pin 543.

Further, a link mechanism 544 that links the process-object-quantity detection body 538 and the switch member 537 is provided in such a manner that, at a portion of the installation portion of the process-object-quantity detection body 538 and the switch member 537, which is located on one end side in the width direction of the threshing device 308, the switch member 537 is brought into an open state when the amount of the threshing process object is large, and the switch member 537 is brought into a closed state when the amount of the threshing process object is small.

The link mechanism 544 will be explained below.

The left side wall 308A of the threshing device 308 has a substantially L-shaped swinging member 545 on the outer side thereof, which is swingable about a horizontal axis P6C. The first linking operation body 547 is inserted into a tube member 546 integrally fixed to the middle of the swing of the treatment agent amount detector 538. The first link operation body 547 extends in the lateral direction and is linked to a swing end portion on one end side of the swing member 545.

On the other hand, a second interlocking operation body 549 is inserted and supported in a cylindrical member 548 integrally fixed to a swing middle portion of the switch member 537. The second interlocking operation body 549 extends in the lateral direction, is bent in an L-shape, and is interlocked and connected to a position close to the swing end on the other end side of the swing member 545. A coil spring 550 serving as a biasing member for biasing the swinging member 545 to swing is provided at a swinging end portion on the other end side of the swinging member 545, and the coil spring 550 biases the switching member 537 in a closed state. In addition, the side wall 308A is formed with a long hole 551 that limits the swing movement range of the first interlocking operation body 547 and a long hole 552 that limits the swing movement range of the second interlocking operation body 549.

According to this configuration, the coil spring 550 is biased to swing so that the opening and closing member 537 is oriented downward and the dust discharge port 405 is closed, and so that the treatment subject amount detection body 538 is lifted and swung upward in a normal posture. These limits of oscillation are limited by the elongated holes 551, 552. When the weight of the discharge discharged from the threshing chamber 329 is large, the treatment amount detector 538 is swung downward and displaced against the upward biasing force of the coil spring 550, and the opening and closing member 537 is swung in the opening direction in accordance with this movement. Further, the larger the weight of the discharge, the larger the treatment agent amount detection body 538 swings downward, and the larger the opening/closing member 537 is opened.

(Transmission structure)

Next, a transmission structure of the threshing device 308 will be described.

As shown in fig. 54, after the power of the engine 310 is transmitted to the traveling input shaft 554 of the transmission 553 for traveling the machine body, the power is transmitted from the traveling input shaft 554 to the input pulley 531, and the input pulley 531 is provided at the right end portion of the rotating shaft 510 of the wind turbine 381 which also serves as an intermediate shaft.

Further, a relay transmission mechanism 558 and a distribution transmission mechanism 559 are provided. The relay transmission mechanism 558 transmits power from a first drive pulley 555, which is a driving rotating body, to a driven rotating body 557, wherein the first drive pulley 555 is provided on the rotation shaft 510 of the wind turbine 381, and the driven rotating body 557 is provided on the relay shaft 556. The distribution transmission mechanism 559 distributes power from the driven rotor 557 to the threshing cylinder 327, the feeder 314, the primary screw 384 and the secondary screw 387 as the processed object conveying mechanism, and the swing drive unit 389.

The relay transmission mechanism 558 will be explained below.

As shown in fig. 55, a fixed relay shaft 556 is provided at a position located at the front side and above the rotation shaft 510 of the wind turbine 381, and the relay shaft 556 protrudes outward in a cantilever manner from the side wall 308A. The relay shaft 556 has a rectangular flange 560 formed on the base end side as viewed from the side, and four corners of the flange 560 are screwed and fixed to the side wall 308A of the threshing device 308 by bolts. A substantially cylindrical shaft portion 561 having a smaller diameter outward from the flange portion 560 is integrally formed, and the driven rotor 557 is rotatably supported by the shaft portion 561.

A first drive pulley 555 is provided at a left end portion of the rotating shaft 510 of the wind turbine 381, and power from the rotating shaft 510 is input from the first drive pulley 555 to an input pulley 563 as an input rotating body via a belt 562, wherein the input pulley 563 is provided at a driven rotating body 557.

The distribution transmission mechanism 559 will be explained below.

As shown in fig. 55, the driven rotary body 557 is of a multiple connection type having an input pulley 563 and a plurality of output pulleys 564, 565, 566 for distributing the supplied power in a continuously connected state, and has a plurality of output pulleys 564, 565, 566 distributed on both sides in the rotational axial center direction with respect to the input pulley 563.

The plurality of output pulleys have: a threshing cylinder output pulley 564 as an output rotating body for supplying power to the threshing cylinder 327; the feeder provides power to the feeder 314 with an output pulley 565; and a conveyance output pulley 566 that supplies power to the primary screw 384, the secondary screw 387, and the swing drive unit 389. Further, of the plurality of output pulleys, the output pulley 564 for the threshing cylinder, which is an output rotating body, is located on the outer side of the machine body than the input pulley 563. The feeder output pulley 565 and the conveyance output pulley 566 are located inward of the machine body with respect to the input pulley 563.

An output pulley 564 for a threshing cylinder is located closest to the outside of the machine body, and the output pulley 564 for a threshing cylinder is detachably attached to the relay shaft 556.

The feeder output pulley 565 is located further from the input pulley 563 than the conveyance output pulley 566, that is, located closest to the inside of the machine body.

As shown in fig. 55, power is transmitted from the threshing cylinder output pulley 564 to the transmission pulley 582 of the threshing cylinder 327 via the threshing cylinder transmission belt 567, power is transmitted from the feeder output pulley 565 to the transmission pulley 583 of the feeder 314 via the feeder transmission belt 568, and power transmitted from the transmission pulley 583 to the feeder 314 is also transmitted to the harvesting unit 313.

The power is transmitted from the conveyance output pulley 566 to the primary screw 384 and the secondary screw 387 via the conveyance belt 569. The conveying belt 569 has a reverse rotation pulley 570 for reversing the rotational power during the transmission, and the power is transmitted from the reverse rotation pulley 570 to the swing driving unit 389 via a swing driving belt 571.

Further, in the middle of the transmission of the upper portion side portion of the conveying belt 569, the conveying belt 569 is pushed down downward by the tension pulley 573 so as not to pass through the lateral side portion of the grain sieve 393.

The rotary shaft 510 of the wind turbine 381 is provided with a second drive pulley 574 serving as a post-treatment rotating body integrated with the first drive pulley 555, and a post-treatment power transmission mechanism 575 for transmitting power from the second drive pulley 574 to the grass discharge treatment device 312.

That is, the accelerated power is transmitted from the second drive pulley 574 to the small-diameter input pulley 581 provided in the drive shaft 580 of the grass discharge treatment device 312 via the front belt 576, the relay shaft 577, and the rear belt 579. As described above, high-speed power is transmitted to perform the grass cutting process. The drive shaft 580 of the grass discharge processing device 312 includes a rotation speed sensor S4C (see fig. 21) for detecting a rotation speed, and when the rotation speed detected by the rotation speed sensor S4C drops below a set speed, a notification is given by a not-shown notification lamp provided in the driver 307.

The combine harvester can harvest rice and wheat as the crops to be harvested, buckwheat, soybean, vegetable seeds, red beans and the like. However, when the target crop is different as described above, the rotation speed of the threshing cylinder needs to be changed. For example, it is necessary to drive at such speeds that rice and wheat are high, buckwheat and soybean are medium, and vegetable and red bean are low.

In this combine, the rotation ratio is set so that the rotation ratio can be driven at a low speed by setting a high speed to a standard speed and removing and replacing the output pulley 564 for the threshing cylinder and the transmission pulley 582 for the threshing cylinder 327 when the speed of the threshing cylinder is changed. At medium speeds, pulleys of different diameters need to be used.

(other embodiment 1 of the third embodiment)

In the above embodiment, the rotary shaft 510 of the wind turbine 381 may be used as an intermediate shaft, but instead of this configuration, a rotary shaft other than the wind turbine, for example, the rotary shaft 384A of the primary screw part 384, the rotary shaft 480 of the secondary screw part 387, or the like may be used as an intermediate shaft, and a dedicated intermediate shaft may be provided.

(other embodiment 2 of the third embodiment)

In the above embodiment, the distribution transmission mechanism 559 distributes power to the threshing cylinder 327, the feeder 314, the primary screw 384, the secondary screw 387, and the swing driving unit 389. The power may be distributed to at least the threshing cylinder 327 and the feeder 314, or may not be distributed to other devices. Furthermore, the power may be distributed to at least 1 or 2 or more of the other devices, or may be transmitted to devices other than the threshing cylinder 327, the feeder 314, the primary screw 384, the secondary screw 387, and the swing driving unit 389.

(other embodiment 3 of the third embodiment)

In the above embodiment, the intermediate shaft (the rotary shaft 510) includes the second drive pulley 574 serving as the post-treatment rotating body, and the post-treatment power transmission mechanism 575 for supplying power from the post-treatment rotating body 574 to the post-treatment device (the grass discharge treatment device 312) may be omitted.

(other embodiment 4 of the third embodiment)

In the above embodiment, the driven rotating body 557 has the input pulley 563 and a plurality of output rotating bodies arranged on both sides in the rotational axis direction with respect to the input pulley 563, the threshing cylinder output pulley 564 as an output rotating body for the threshing cylinder is provided at a position on the outside of the machine body with respect to the input pulley 563, the feeder output pulley 565 as an output rotating body for the feeder and the conveyance output pulley 566 as an output rotating body for conveyance of the processed object are provided at a position on the inside of the machine body with respect to the input pulley 563, and the feeder output pulley 565 as an output rotating body for the feeder is located at a position that is farthest from the input pulley 563, that is, closest to the inside of the machine body with respect to the conveyance output pulley 566 as an output rotating body for conveyance of the processed object. However, the present invention is not limited to this configuration, and the arrangement of the input pulley 563 and the output pulleys 564, 565, and 566 as the output rotating bodies may be variously changed. For example, the conveying output pulley 566 as the output rotating body for conveying the processed object may be located at the position closest to the inner side of the machine body, and the arrangement of the output rotating body is not limited to the configuration of the above embodiment.

(other embodiment 5 of the third embodiment)

In the above embodiment, the power of engine 310 is transmitted to transmission mechanism 553 for machine body traveling and then transmitted from transmission mechanism 553 for machine body traveling to the intermediate shaft (rotary shaft 510), but the power of engine 310 may be directly transmitted to the intermediate shaft.

(other embodiment 6 of the third embodiment)

In the above-described embodiment, a general-type combine harvester having a wheel-type travel device is exemplified as the combine harvester, but the present invention is not limited thereto, and a general-type combine harvester having a crawler travel device may be used.

(fourth embodiment)

Next, a fourth embodiment of the present invention will be explained with reference to the description of the drawings.

(Overall Structure)

Fig. 56 and 57 show a whole-feed type (normal type) combine as an example of the harvester of the present invention. Fig. 56 is a right side view showing the entire body, and fig. 57 is a plan view showing the entire body.

As shown in these figures, the all-feed combine harvester has a traveling device 602 on the lower side of a body frame 601, and the traveling device 602 is configured by a pair of left and right front wheels 602F and 602F (corresponding to front traveling devices) and a pair of left and right rear wheels 602R and 602R (corresponding to rear traveling devices).

A cab 615 (corresponding to a cab) is provided at the front of the vehicle body frame 601, a threshing device 604 and a grain tank 605 are provided at the rear side of the cab 615, and a grass discharge processing device 616 (corresponding to a grass discharge unit) is provided at the rearmost of the vehicle body frame. The harvesting unit 617 is provided at the front portion of the body frame 601 to be lifted and lowered with respect to the body frame 601 about a horizontal axis (not shown) in the left-right direction, thereby constituting an automatic traveling body.

An engine 603 is mounted on a front portion of the body frame 601 and on a lateral side portion of the threshing device 604, and a radiator 607 is disposed at a rear position apart from the engine 603. A fuel tank 614 is mounted on the side opposite to the engine 603 and the radiator 607 across the threshing device 604. The power of the engine 603 is transmitted to the threshing device 604, the harvest processing device 617, a radiator cooling fan 670 for cooling the radiator 607, and the like, in addition to the traveling device 602.

Power is transmitted from a transmission case 620 mounted on the front portion of the vehicle body frame 601 to the front wheels 602F of the running gear 602 via a front wheel drive shaft 624 extending leftward and rightward. That is, power is transmitted from the front wheel drive shaft 624 to the front wheels 602F via the reduction gear box 625 and the front axle 602 a. The reduction gear box 625 is provided in a state of entering a recessed portion formed on a surface of the front wheel 602F facing the inside of the machine body, and the front axle 602a is supported by the reduction gear box 625.

Thus, the power of the engine 603 is transmitted to the front wheels 602F via the front axle 602a, the front wheels 602F are mounted so as to be rotationally driven around the horizontal lateral axis x1D, and the front wheels 602F are non-steered wheels formed of tires and have a larger width and diameter in the lateral direction than the rear wheels 602R.

As shown in fig. 56 and 57, at the rear portion of the vehicle body frame 601, rear wheels 602R are provided on both left and right end sides of a rear wheel support frame 610 attached to be swingable left and right about a front-rear direction axial center (not shown). The rear wheel 602R is a steered wheel, and has a rear axle 602b steerable around the vertical swing axis y 1D. The rear wheel 602R is formed of a tire wheel, has a smaller width and diameter in the lateral direction than the front wheel 602F, and is rotatable about a horizontal lateral axis x2D of the rear axle 602 b.

Outer covers 609 (corresponding to side covers) are provided on both left and right lateral sides of the automatic traveling machine body, and the outer covers 609 are located between the front wheels 602F and the rear wheels 602R below the grain box 605, and cover the lateral sides of the machine body.

The cover 609 is supported so as to be swingable up and down about a swing fulcrum z1D provided in the front-rear direction near the upper end edge, and is capable of switching between a closed posture in which the wide cover surface 609A is oriented in the vertical direction and an open posture in which the cover surface 609A is oriented in the horizontal direction.

(reaping apparatus)

As shown in fig. 56 and 57, a harvesting unit 617 that moves up and down about a horizontal axis in the left-right direction is provided on the front side of the threshing unit 604 mounted on the body frame 601.

The harvest processing apparatus 617 includes: a feeder 617A for supplying harvested crops such as straw to the threshing device 604; raking the reel 617B, and raking the head end of the spike of the crops such as the planted standing straws and the like; a harvesting device 617C cutting off the root side; and a horizontal transfer screw 617D for gathering the harvested crops at the center in the harvesting width direction. The reaping apparatus 617 reaps the crop, and feeds the reaping apparatus 617A to the threshing apparatus 604.

The feeder 617A is provided with an endless belt-like conveyance member that rotates in the front-rear direction inside a square cylindrical casing, and conveys the harvested crop that has been conveyed in to the rear upper side. The crop conveying direction of the feeder 617A is the front-rear direction along the rotation axis p0D (see fig. 57) of the threshing cylinder 640 in the threshing device 604, and the raking reel 617B, the harvesting device 617C, and the traverse screw 617D can be lifted and lowered by the lifting and lowering operation of the feeder 617A.

(threshing device)

As described above, the threshing device 604 is disposed on the vehicle body frame 601 such that the threshing cylinder rotation axis p0D is along the front-rear direction. The threshing device 604 is disposed in the front-rear direction interval between the front wheels 602F and the rear wheels 602R in the front-rear direction, and is disposed in the width interval between the front wheels 602F and the rear wheels 602R on both the left and right sides in the left-right direction.

As shown in fig. 56, the lower surface of the threshing device 604 is located slightly lower than the front axle 602a of the front wheels 602F as non-steered wheels and slightly higher than the rear axle 602b of the rear wheels 602R as steered wheels. That is, the lower surface of the threshing device 604 is disposed at a height position substantially equal to the height position of the front axle 602a of the front wheel 602F as a non-steered wheel or the height position of the rear axle 602b of the rear wheel 602R as a steered wheel.

The threshing device 604 arranged as described above is arranged in a state where the threshing cylinder rotation axis p0D of the threshing device 604 is offset to the left side with respect to the center line CLD in the left-right direction of the machine body. Since the center line of the threshing device 604 in the left-right direction is located at the same position as the rotation axis p0D of the threshing cylinder 640 disposed inside in the front-rear direction, the whole threshing device 604 is also disposed in a state of being shifted to the left side with respect to the center line CLD in the left-right direction of the machine body.

The feeder 617A for supplying the harvested crop to the thresher 604 is disposed in a state of being offset to the left with respect to the center line CLD in the left-right direction of the machine body, similarly to the thresher 604, and the feeder 617A is disposed in a position of partially overlapping the transmission 620 offset to the right with respect to the center line CLD in the left-right direction of the machine body in a plan view, as shown in fig. 57.

The grass discharge processing unit 616 is integrally installed at the rear of the threshing unit 604, and cuts the threshed grass discharge and discharges the cut grass discharge to the outside of the machine body.

The threshing device 604 is formed in a rectangular box shape long in the front-rear direction of the machine body, and has a wind turbine 641 at its front end (see fig. 63). A windmill shaft 641a having the blower blades of the windmill 641 extends outward in the right lateral direction of the threshing box 604A, and a threshing input pulley 641b for receiving power transmitted from the engine 603 to the threshing device 604 is attached to the extending portion of the windmill shaft 641 a.

The threshing device 604 is not provided with an auxiliary wind turbine, and only the wind turbine 641 is used to blow air to the selected parts.

A threshing cylinder 640 is provided inside the threshing device 604 so as to be rotationally driven around a cylinder shaft 640a in the front-rear direction, and the threshing cylinder 640 is used to perform threshing processing on the harvested crop fed from the feeder 617A side. The threshing cylinder 640 is provided with a sorting device 642 and the like, and the sorting device 642 performs swing sorting of the harvested crops threshed by the threshing cylinder 640 by the air blowing operation of the wind turbine 641.

(grain box)

As shown in fig. 56 and 57, the grain tank 605 is provided behind the cab 615 across the upper sides of the tank support 613 and the threshing device 604, wherein the tank support 613 is provided upright on the right lateral side of the vehicle body frame 601, and the threshing device 604 is provided on the left lateral side of the vehicle body frame 601.

The grain tank 605 is mounted with a tank-shaped tank body 651 on the upper side of a bottom frame 650 formed in a lattice shape by assembling various steel materials such as square pipes, and the tank body 651 has a width in the left-right direction that extends over substantially the entire width in the left-right direction of the machine body.

These bottom frames 650 and the box main body 651 are integrally coupled to each other, and are supported so as to be swingable about a swing axis center z2D in the front-rear direction by a swing support shaft 652 provided at an upper end portion of the box support base 613.

As shown in fig. 56, 57, 60, and 61, a box support base 613 is provided on the body frame 601 at a position on the right lateral side of the threshing device 604 and between the front wheels 602F and the rear wheels 602R. The box support 613 has an outer support 613A disposed on the side away from the thresher 604 and an inner support 613B disposed on the side closer to the thresher 604 than the outer support 613A. The lower ends of the outer support 613A and the inner support 613B are fixed to the vehicle body frame 601, and the upper ends of the outer support 613A and the inner support 613B are coupled to the upper frame 613C. An end portion of the grain tank 605 on the grain discharge port 605A side corresponding to one end side in the left-right direction is connected and supported to the upper frame 613C so as to be swingable in an up-and-down manner around a swing axis z2D in the front-rear direction.

A hydraulically driven swing cylinder 653 is attached between the inner support 613B of the box support 613 and the bottom frame 650 of the grain box 605. By the expansion and contraction operation of the swing hydraulic cylinder 653, the grain tank 605 can be made to swing up and down about the swing axis z2D, and the posture can be changed between the storage posture and the discharge posture. The storage posture is a posture in which the bottom surface of the tank main body 651 is horizontal or substantially horizontal, and the discharge posture is a posture in which the bottom surface is upright.

As shown in fig. 60 and 61, a vehicle body frame 601 having a box support base 613 is provided with a device mount 626 and a working space s1D for facilitating maintenance and the like on the rear side of the engine 603 by utilizing the space below the box support base 613.

A compressor 603C described below is provided on the equipment platform 626, a valve unit 627 is provided in a state of being located on the inner side of the body of the compressor 603C, and a power supply 628 is provided on the rear side of the compressor 603C and the valve unit 627. The working space s1D is formed between the rear end of the equipment platform 626 and the front end of the radiator 607, and is formed at a position closer to the inside of the body than the lateral outer end of the vehicle body frame 601. An operator standing on the ground can perform maintenance on the equipment mounting platform 626 on the front side and the periphery of the radiator 607 on the rear side while entering the working space s 1D.

When the cover 609 positioned on the outer side is in the closed posture, the cover 609 covers the lateral outer sides of the body mount 626 and the working space s1D, and when the cover 609 is switched to the open posture, the lateral outer sides are opened.

(driver's cabin)

As shown in fig. 56, 57, and 77, cab 615 mounts cab frame 611 erected on body frame 601.

Thus, cab 615 is supported by body frame 601 via cab frame 611 at a position higher than the upper edge of the outer diameter of front wheel 602F and further forward than the rear edge of front wheel 602F.

A steering handle 615a for steering operation, a driver seat 615b, and the like are provided in the cab 615, and the rear wheels 602R can be steered by operating the steering handle 615 a. As shown in fig. 77, in the cab 615, a harvesting unit reverse-rotation operation tool 706 of a harvesting processing apparatus 617 and a fan reverse-rotation operation tool 707 of a radiator cooling fan 670, which are described below, are arranged between a right lateral side portion of the driver seat 615b indicated by a broken line and a side panel 705 present on the right side of the driver seat 615 b.

The harvesting unit reverse rotation operation member 706 is coupled to the normal rotation clutch 619A and the reverse rotation clutch 619B of the harvesting unit via a coupling mechanism (not shown) having an operation lever 706a, and the fan reverse rotation operation member 707 is coupled to an operation arm 662 of the radiator cooling fan 670, which will be described later, via a coupling mechanism (not shown) having an operation wire 707 a. The harvesting unit reverse-rotation operator 706 and the fan reverse-rotation operator 707 are coupled such that the harvesting unit and the radiator cooling fan 670 are in a reverse-rotation state during a pulling operation of the respective operators 706 and 707.

(Power transmission structure)

Next, a power transmission structure for transmitting power of the engine 603 to the threshing device 604, the radiator cooling fan 670, and the like will be described.

As shown in fig. 57, 59, 62, and 63, the engine 603 is disposed on the vehicle body frame 601 at a portion closer to the right outer side with a crankshaft (not shown) extending in the left-right direction of the machine body.

On one end side (inside the machine body) in the left-right direction of the engine 603, a flywheel 603A and an output pulley 630 (corresponding to an engine output rotating body) as a first output portion are provided so that the axial direction is along the left-right direction of the machine body. That is, the flywheel 603A is mounted on the output shaft of the engine 603, and the input pulley 630 is mounted on the flywheel 603A. On the other end side in the left-right direction (outside of the machine body), an output shaft 631 serving as a second output portion projects, and a second output pulley 631a, a third output pulley 631b, and a fourth output pulley 631c are attached to the output shaft 631.

The input pulley 630 is formed in a bottomed cylindrical shape, and the output pulley 630 is attached to the flywheel 603A with its bottom portion in contact with the flywheel 603A. A bottom portion on the inner peripheral side of the output pulley 630 has a mounting portion 630A for the output shaft of the engine 603. The 3 pulley grooves 630B of the output pulley 630 are formed in the outer peripheral portion of the mounting portion 630A.

(Power transmission structure of first output part)

As shown in fig. 58 and 59, a transmission case 620, which transmits a driving force from an output pulley 630 as a first output portion of the engine 603, is disposed on the front side of the engine 603 and is located on the inner side of the body (left side in the left-right direction) with respect to the engine 603.

The transmission 620 has an input shaft 621 that protrudes outward from the machine body (right side in the left-right direction), and an input/output pulley 622 as an input rotating body is integrally rotatably attached to the input shaft 621. 3 first transmission belts 632A are wound between the input/output pulley 622 and the output pulley 630, and engine power is input from the output pulley 630 to the transmission 620.

The input/output pulley 622 includes a first rotor portion 622A and a second rotor portion 622B, the first rotor portion 622A has 3 belt grooves for winding 3 v belts of the first transmission belt 632A, and the second rotor portion 622B has 2 belt grooves for winding a second transmission belt 632B described below.

The first rotating body portion 622A and the second rotating body portion 622B constitute integrally formed multiple pulleys, the first rotating body portion 622A side is of a large diameter and is located at a position close to the outside of the machine body where the engine 603 is located, and the second rotating body portion 622B is of a small diameter and is located at a position close to the inside of the machine body where the threshing device 604 is located.

A continuously variable transmission 623 is attached to the transmission 620 on the side opposite to the side on which the input/output pulley 622 is provided, and the continuously variable transmission 623 transmits power input from the input shaft 621 to the traveling device 602 after shifting. The power shifted by the continuously variable transmission 623 is output from the front wheel drive shaft 624 via a transmission mechanism, not shown, provided inside the transmission 620.

A second belt 632B is wound around the second rotating body portion 622B of the input/output pulley 622, and the second belt 632B is formed of 2 triangular belt groups as one example of an endless rotating belt.

The second belt 632B is configured by winding a threshing input pulley 641B provided on a windmill shaft 641a of the threshing device 604, and inputting engine power from the second rotating body portion 622B to the threshing device 604 via the second belt 632B.

The threshing input pulley 641B on the windmill shaft 641a side is formed to have a larger diameter than the second rotating body portion 622B and the output pulley 630, and the engine speed is reduced and transmitted to the windmill shaft 641 a.

As shown in fig. 57 to 59, the threshing device 604 is mounted on the vehicle body frame 601 at a position rearward of the transmission 620, and the windmill shaft 641a is located at a position closer to the axial center x3D of the output pulley 630 and the output shaft 631 of the engine 603 than the input shaft 621 of the transmission 620 in the front-rear direction. Specifically, as shown in fig. 58, the windmill shaft 641a is located at a position overlapping the output pulley 630 when viewed from the direction of the axial center x3D of the output pulley 630 and the output shaft 631 of the engine 603.

Therefore, the output pulley 630 and the threshing input pulley 641B are disposed in a positional relationship overlapping each other, and the first belt 632A and the second belt 632B are also disposed in a positional relationship overlapping each other.

As shown in fig. 57 and 59, the output pulley 630, the input-output pulley 622, and the threshing input pulley 641b are also disposed between the engine 603, the transmission 620, and the threshing device 604 in plan view. The input-output pulley 622 is disposed with the first rotor portion 622A on the side closer to the engine 603 and the second rotor portion 622B on the side closer to the transmission 620 and the threshing device 604.

Therefore, the first belt 632A and the second belt 632B are naturally disposed between the engine 603 and the transmission 620 and the threshing device 604.

A first belt 632A wound between an output pulley 630 of the engine 603 and the first rotating body portion 622A of the transmission 620 is provided in such a manner as to act on the first tension pulley 635.

The second belt 632B wound around the second rotating body portion 622B of the transmission 620 and the threshing input pulley 641B of the threshing device 604 is provided so as to act on the second tension pulley 636.

As shown in fig. 58 and fig. 59, one end side of the support shaft 635a of the first tension wheel 635 is extended long, and the extended portion is supported by the free end side of the first arm member 635b which is swingable and the free end side of the urging mechanism 637.

As shown in fig. 58, the base end side of the first arm member 635b is pivotally supported by an L-shaped support base frame 612 of the vehicle body frame 601, and the support base frame 612 is lifted to a position higher than the transmission case 620 as a mounting base of the cab frame 611. The base end side of the urging mechanism 637 is pivotally supported on a bracket 601a fixed to the vehicle body frame 601 on the side closer to the engine 603.

The urging mechanism 637 is provided with a compression spring 637a, and the compression spring 637a urges the support shaft 635a and the urging mechanism 637 in a direction to shorten the distance between the pivot support positions on the base end side. The urging force is applied to the first tension roller 635 so that the urging force of the compression spring 637a urges the first transmission belt 632A to a side constantly tensioned.

A support shaft 636a of the second tension pulley 636 is attached to a second arm member 636b which is swingable, and a base end side of the second arm member 636b is pivotally supported on an upper portion of the transmission case 620. An operating member 636c having a coil spring is coupled to a middle position in the longitudinal direction of the second arm member 636b, and a threshing clutch operating element, not shown, provided in the cab 615, such as an operating lever that is coupled to the operating member 636c and can be operated in a swinging manner, can be switched between a threshing clutch on state and a threshing clutch off state.

As a result, the second tension pulley 636 is swung to the lifting side to switch the second belt 632B to the tension side, thereby bringing the threshing clutch on state in which the engine power is transmitted to the threshing device 604. The second belt 632B is switched to the slack side by releasing the second tension pulley 636 from being lifted, and the threshing clutch is put into a threshing clutch cutoff state in which the transmission of the engine power to the threshing device 604 is cut off.

As shown in fig. 63, the engine power input to the windmill shaft 641a is distributed and supplied to a threshing cylinder side driving mechanism 643 for driving the threshing cylinder 640, a harvesting side driving mechanism 644 for transmitting the power to the harvesting unit 617 including the feeder 617A, and a sorting side driving mechanism 645 for driving the sorting unit 642 and the like. The threshing cylinder-side drive mechanism 643, the harvesting-side drive mechanism 644, and the sorting-side drive mechanism 645 each include a belt. Power is also transmitted from the downstream side of the transmission of the sorting-side drive mechanism 645 to the grass discharge processing device 616 via the transmission belt 646.

The grass discharge processing unit 616 is disposed behind the threshing unit 604. A transmission mechanism is provided that transmits power from a drive pulley 646B to a driven pulley 646A as an input rotating body of the grass discharge processing device 616 via a transmission belt 646, wherein the drive pulley 646B receives power transmission from the engine 603 side. The drive belt 646 is composed of a plurality of (e.g., 2) belts. As described above, since the transmission belt 646 is constituted by a plurality of belts, the tension of the transmission mechanism can be dispersed to the plurality of belts, thereby extending the service life of the transmission belt 646. Further, even if the driven pulley 646A is set as small as possible in order to increase the acceleration rate, the drive belt 646 is formed of a plurality of belts, and therefore, slip is not likely to occur between the driven pulley 646A and the drive belt 646. Therefore, even if the driven pulley 646A is not set to an unnecessarily large diameter, power can be smoothly transmitted to the grass discharge processing device 616. The transmission belt may be composed of 3 or more belts.

The sorting-side drive mechanism 645 has: a transmission belt 645a for transmitting power to the primary screw portion 642a and the lifting device 647; a transmission belt 645b for transmitting power to the secondary screw 642b and the secondary feedback device 648; and a transmission belt 645c that transmits power to the swing sorting plate 642 c.

The power distributed to the harvesting-side drive mechanism 644 among the engine power input to the windmill shaft 641a is input to the forward rotation pulley 618a of the harvesting drive shaft 618 of the harvesting processing device 617 via a transmission belt. The power distributed to the threshing cylinder-side driving mechanism 643 is output as reverse power from the reverse rotation output pulley 649b via a reverse rotation mechanism 649a incorporated in the threshing cylinder driving case 649. The reverse rotation force is transmitted to the harvesting drive shaft 618 via a transmission belt wound around the reverse rotation output pulley 649b and the reverse rotation pulley 618b of the harvesting drive shaft 618.

As shown in fig. 63, there are provided: a forward rotation clutch 619A capable of operating a transmission belt that transmits power to the forward rotation pulley 618a to a tensioned state or a slack state; and a reverse clutch 619B capable of operating a belt for transmitting power to the reverse pulley 618B in a tensioned state or a slack state.

The forward clutch 619A and the reverse clutch 619B can be switched between a tensioned state and a relaxed state in such a manner that power is transmitted in a state where the belt is tensioned, power is not transmitted in a state where the belt is relaxed, and one of the clutches is in a tensioned state while the other clutch is in a relaxed state.

Then, the forward rotation clutch 619A is always biased in the direction of the forward rotation driving state so as to put the transmission belt in a tensioned state and the reverse rotation clutch 619B in a relaxed state.

In this state, by pulling the harvesting unit reverse rotation operation tool 706 in the cab 615, which will be described later, the reverse rotation clutch 619B is tightened, the forward rotation clutch 619A is loosened, and the operation is switched to the reverse drive state. When the pulling operation of the harvesting section reverse rotation operation member 706 is released, the original forward rotation driving state is restored.

The transmission belt and the reverse clutch 619B constitute a first reverse rotation mechanism for reversing a harvesting unit driving system of the harvesting processing apparatus 617 as a working unit. The belt is wound around a reverse rotation mechanism 649a and a reverse rotation output pulley 649b built in the threshing cylinder driving case 649, and a reverse rotation pulley 618b of the harvesting drive shaft 618.

(Power transmission structure of second output part)

On the other end side (outside the machine body) of the engine 603, an output shaft 631 serving as a second output portion projects, and the power transmission system of this second output portion is as follows.

As shown in fig. 58 and 60 to 63, a second output pulley 631a, a third output pulley 631b, and a fourth output pulley 631c are integrally rotatably attached to the output shaft 631 in this order in proximity to the engine 603.

On the other end side (outside the machine body) of the engine 603, a power generation drive pulley 633 for driving the alternator 603B and an air blowing drive pulley 634 for driving an air blowing fan 702 of an air blowing mechanism 700 described below are provided so as to rotate about an axial center in the left-right direction parallel to the axial center x3D of the output shaft 631 as the second output portion.

As shown in fig. 61, a third belt 638A made up of 1 v belt as an example of an endless rotating belt is wound over the second output pulley 631a (corresponding to an output rotating body that outputs to the blower fan 702 of the blower mechanism 700), the power generation drive pulley 633, and the blower drive pulley 634, and the alternator 603B and the blower fan 702 are rotationally driven in accordance with the rotation of the second output pulley 631 a.

Of the third output pulley 631b and the fourth output pulley 631c mounted on the output shaft 631, the fourth output pulley 631c farthest from the engine 603 is smaller in diameter than the third output pulley 631 b.

A fifth belt 638C is wound around the fourth output pulley 631C so as to transmit the driving force to the compressor 603C provided on the rear side of the engine 603.

As shown in fig. 63, an output shaft of an engine 603 includes: a third output pulley 631b as a fan pulley for transmitting power to the radiator cooling fan 670; and a fourth output pulley 631C as a compressor pulley for transmitting power to the compressor 603C of the air conditioner. The third output pulley 631b is located closer to the engine 603 than the fourth output pulley 631 c.

(Transmission to radiator cooling fan)

As shown in fig. 60, 61, and 63, the power transmission to the radiator cooling fan 670 is performed by outputting the power of the engine 603 as the driving force of the radiator cooling fan 670 via the fourth belt 638B, the relay shaft 655, and the below-described forward/reverse rotation selection mechanism 606. The fourth belt 638B is wound around the third output pulley 631B, and the third output pulley 631B is attached to the output shaft 631. The relay shaft 655 is disposed at an upper portion of the rear far from the engine 603.

The relay shaft 655 has a relay input pulley 655a (corresponding to a driving rotor) at an outer end (right end in the left-right direction) of the machine body, and has a pair of relay output pulleys 655b and 655c (corresponding to a driving rotor) at an inner end (left end in the left-right direction) of the machine body. A fourth belt 638B (corresponding to a toroidal rolling body) is wound around the relay input pulley 655a and the third output pulley 631B, and the rotational power of the output shaft 631 is transmitted to the relay shaft 655.

Thus, the fourth belt 638B is disposed between the engine 603 positioned at the front and the radiator 607 positioned at the rear by the relay shaft 655 in a state of bypassing the equipment platform 626 and the upper part of the working space s1D, whereby the working space s1D can be used as a space in which work such as maintenance is easy.

A tensioning mechanism 654 is provided in the fourth belt 638B, the tensioning mechanism 654 serving to partially remove slack in the belt on the slack side. The tension mechanism 654 has a fixed-side pulley 654b, the fixed-side pulley 654b is pivotally supported on a support shaft 654a in a rotatable manner, and the support shaft 654a is provided at a part of the outer support 613A of the box support base 613. A swing arm 654c is provided to be swingable about a support shaft 654a of the fixed-side pulley 654b, and a free-end pulley 654e is provided to be pivotable about a support shaft 654d attached to a free end of the swing arm 654 c. A coil spring 654f is further provided, and the coil spring 654f pulls and biases the swing arm 654c toward the removal slack side (upper right side in fig. 60).

By providing the fixed-side pulley 654B, the swing arm 654c, the free-end-side pulley 654e, and the coil spring 654f, the slack eliminating tensioner mechanism 654 is configured to always bias the fourth belt 638B toward the tension side.

That is, the tension mechanism 654 includes a free end pulley 654e serving as a rotating body for applying tension to the fourth belt 638B, and a swing arm 654c for supporting the free end pulley 654 e. The free end-side pulley 654e is provided: the fourth belt 638B is located downstream of the support shaft 654a, which is the pivot axis of the pivot arm 654c, in the rotational direction.

A pair of relay output pulleys 655b and 655c on the relay shaft 655 side and a fan input pulley 672 (corresponding to an input rotary body) on the radiator cooling fan 670 side are wound and stretched with a normal rotation belt 656 (corresponding to an endless rotary belt of a normal rotation power transmission mechanism) and a reverse rotation belt 657 (corresponding to an endless rotary belt of a reverse rotation power transmission mechanism).

The normal rotation belt 656 of the normal rotation belt 656 and the reverse rotation belt 657 is wound so that its inner peripheral surface contacts the outer peripheral surface of the fan input pulley 672, and the reverse rotation belt 657 is wound so that its outer peripheral surface contacts the outer peripheral surface of the fan input pulley 672.

The forward rotation transmission belt 656 and the reverse rotation transmission belt 657 arranged as described above constitute the forward/reverse rotation selection mechanism 606 together with the pair of tension wheel bodies 663, 664. The forward/reverse selection mechanism 606 will be described below.

The forward rotation transmission belt 656 and the reverse rotation transmission belt 657 arranged as described above constitute the forward/reverse rotation selection mechanism 606 (corresponding to the second reverse rotation mechanism) integrally with the pair of tension pulley bodies 663 and 664. The pair of tension wheel bodies 663, 664 can be alternatively switched so that one of the forward rotation belt 656 and the reverse rotation belt 657 is in a tensioned state and the other is in a relaxed state.

The pair of tension wheel bodies 663, 664 are coupled to a fan reverse-rotation operating member 707 provided in the cab 615 via an operating wire 707 a. Further, the forward rotation transmission state in which the forward rotation transmission belt 656 is tensioned and the reverse rotation transmission state in which the reverse rotation transmission belt 657 is tensioned can be switched by the operation of the fan reverse rotation operation element 707.

(air supply mechanism)

The air blowing mechanism 700 has the following structure.

As shown in fig. 56, 60, and 62, covers 609 are provided on both lateral sides of the automatic traveling machine body. The outer cover 609 provided on the right lateral side of the machine body among the outer covers 609 will be explained below.

The right hood 609 is disposed laterally outside the threshing device 604 and the engine 603, and includes an upper hood 690 that can be opened and closed by swinging about a forward and backward swinging axis z1D, and a lower hood 691 disposed laterally outside the threshing device 604 and the engine 603 on the lower side of the lower edge of the upper hood 690 in the closed position.

The lower cover unit 691 is not opened and closed by swinging about the swinging axis z1D as in the case of the upper cover unit 690, and the lower cover unit 691 is attachable to and detachable from the box support 613 for placing and supporting the grain box 605 thereon via an appropriate engaging metal member so as to cover the lower side of the engine 603.

Therefore, the posture can be changed between the closed posture in which the lower cover unit 691 is attached to the box support base 613 and covers the right lateral side portion of the machine body, and the open posture in which the lower cover unit is detached from the box support base 613.

An air supply part 701 including a plurality of vent holes 701a shown in fig. 62 is formed below the front part of the upper cover body 690. The size of the vent hole 701a is set so that air can pass through while preventing dust from entering the inside of the machine body from the outside of the upper cover body 690. The air supply part 701 has a portion where the vent hole 701a is formed at a position facing the rotation range of the blower fan 702 of the blower mechanism 700, and has an area substantially equal to the rotation range of the blower fan 702.

The fan cover 703 is provided on the inner surface of the upper cover body 690 where the air supply part 701 is formed, so as to be positioned outside the rotation radius of the blower fan 702.

The fan cover 703 is formed in a partial arc shape along the rotation locus of the blower fan 702 so as to cover the upper half side of the blower fan 702 from above, and is provided in a range covering almost half of the circumference of the blower fan 702.

The air blowing mechanism 700 is formed by combining an air supply unit 701, a blowing fan 702, and a fan cover 703, and can suck outside air from the outside of the engine and blow air to the engine 603 side by the air blowing mechanism 700 regardless of the presence or absence of the cover 609.

This makes it possible to blow off fine dust that tends to accumulate around the engine 603, and to easily reduce the number of times of maintenance for removing the dust accumulated around the engine 603.

Further, since air supply unit 701 and fan cowl 703 are provided in upper cowl body 690, air supply unit 701 and fan cowl 703 can be moved to a position away from the periphery of engine 603 by changing the posture of upper cowl body 690 to the open posture when performing maintenance around engine 603. Therefore, not only the periphery of the engine 603 can be widely opened, but also the trouble of attaching and detaching the air supply part 701 and the fan cover 703 can be eliminated.

(suction box of radiator)

Radiator 607 disposed at the rear of the automatic traveling body is provided with radiator cooling fan 670 on the inner side of the body and air intake box 608 on the outer side of the body. The radiator 607 is disposed at a portion near the right side of the automatic traveling machine body, and the outside air from the intake box 608 side is introduced into an outward ventilation surface 607a on the side opposite to the side where the radiator cooling fan 670 with the fan cover 670a is disposed. A drain pipe 607b used when discharging the cooling water is provided below the radiator 607.

Intake box 608 is formed by combining lower box 608A and upper box 608B, lower box 608A being disposed so as to face the outside of radiator 607, and upper box 608B being disposed so as to be located above lower box 608A.

As shown in fig. 64 to 67, in the lower tank 608A, a portion corresponding to a surface of the radiator 607 facing the outward ventilation surface 607a (simply referred to as an inner open surface) and a portion corresponding to a surface opposite to the inner open surface (simply referred to as an outer open surface) are open to form an opening portion. The periphery of the opening portions on both the inner and outer sides has a peripheral surface formed by four surfaces along the peripheral edge of the rectangular heat sink 607, and a box main body 680 formed in a lateral short cylindrical shape having a substantially rectangular shape is configured.

Further, a cover member 681 is provided so as to be able to open and close the outer open surface of the case body 680, and faces the outer open surface in the closed posture, and the case body 680 and the cover member 681 are combined to constitute the lower case portion 608A.

The cover member 681 has a plate surface 681a formed as a flat imperforate surface covering the entire outer open surface of the case body 680 and the lower portion of the upper case portion 608B, and an inward end portion 681B folded back inward toward the inside of the body around the plate surface 681 a. The cover member 681 is swingable to open and close around the vertical axis y2D by a hinge 682 attached to a side surface 680a on the front end side of the peripheral surface of the box body 680.

An inward end portion 681b on the rear end side of the cover member 681 and a rear end side surface 680b portion of the peripheral surface of the box main body 680 are fixedly coupled to each other by a snap-fit type stopper metal 683.

An upper tank portion 608B is partially mounted on an upper surface 680c of four peripheral surfaces of the tank main body 680. The upper tank 608B has a substantially rectangular box shape as a whole, and the shape of the upper tank 608B is different between when viewed along the axial direction of the radiator cooling fan 670 and when viewed along the direction intersecting the axial direction of the radiator cooling fan 670. That is, as shown in fig. 64, the entire width is formed narrower than the width of the lower tank portion 608A when viewed from the side (when viewed in the axial direction of the radiator cooling fan 670). The upper portion is narrower than the lower portion and has a longitudinal shape, and the rear portion is formed in a deformed trapezoidal shape inclined downward rearward.

When viewed from the rear (viewed in a direction intersecting the axial center of the radiator cooling fan 670), as shown in fig. 65, the lower side is formed to have a width approximately equal to the width of the lower tank 608A in the left-right direction, and the upper side is formed to have a wide shape protruding inward of the machine body with respect to the lower side, and has a width in the left-right direction larger than the width of the lower tank 608A in the left-right direction.

An air inlet 684 for introducing outside air into each of the front, rear, left, and right surfaces is formed in the upper box portion 608B.

That is, in the intake box 608 disposed adjacent to the heat sink 607, an intake port 684 for ventilation made of a perforated metal plate or mesh is formed in the lateral outer surface 608Ba of the upper box portion 608B on the side opposite to the side where the heat sink 607 is disposed in the horizontal direction. A similar air inlet 684 is also formed in the lateral inner surface 608Bb facing the inside of the housing on the same side as the radiator 607 in the horizontal direction on the side opposite to the lateral outer surface 608 Ba.

Further, a front side surface 608Bc facing the front side of the housing and a rear side surface 608Bd facing the rear side of the housing, which are located between the lateral outer surface 608Ba and the lateral inner surface 608Bb, are also provided with air inlets 684, which are similarly formed of perforated metal plates or meshes, respectively.

The upper box portion 608B is disposed at a position higher than the grass discharge processing device 616 provided at the rear end portion of the automatic traveling machine body. Further, a non-perforated cylindrical portion 685 is formed in the upper tank portion 608B at a position corresponding to the vicinity of the lower portion, and the inlet 684 is formed at a position higher than the non-perforated cylindrical portion 685. The lower edge of the suction opening 684 is set to a height that is approximately equal to the upper edge of the rear cover 604B provided on the rear side of the threshing device 604 and the upper edge of the cover member 681 of the lower box 608A. The height of the upper end of the upper box section 608B is set to be approximately equal to or less than the height of the upper end edge of the grain box 605 existing on the front side in a non-inclined state.

The ventilation openings 686 having substantially the same rectangular shape and substantially the same size are formed at the opposing portions of the lower tank portion 608A and the upper tank portion 608B configured as described above, that is, the opposing portions of the upper surface 680c of the four peripheral surfaces of the tank main body 680 and the lower surface of the upper tank portion 608B, respectively.

As shown in fig. 64 to 67, a mounting bracket 687 having an L-shaped cross section attached to the outer side of the lower end portion of the lateral outer surface 608Ba of the upper tank portion 608B is welded and fixed to the lateral outer side of the cylindrical portion 685 at the periphery of the ventilation opening 686. A coupling hole 687a with a fixing nut facing the coupling hole formed on the facing surface side of the mounting bracket 687 is formed at the right lateral outer end of the upper surface 680c of the box main body 680, and can be coupled and fixed by a coupling bolt 687 b.

On the rear side of the ventilation opening 686, an upright projecting piece 688 having an L-shaped cross section facing the inside of the lower end portion of the rear side surface 608Bd of the upper tank portion 608B is welded and fixed to the upper surface 680c of the tank main body 680, and a coupling hole 688a with a fixing nut facing the coupling hole formed in the upright projecting piece 688 is formed in the cylindrical portion 685 of the rear side surface 608Bd and can be coupled and fixed by a coupling bolt 688B.

Therefore, the lower end inner surface of the rear side surface 608Bd of the upper tank portion 608B is brought into contact with the outer side of the rising protrusion piece 688 so as to face the coupling hole 688A of the rear side surface 608Bd, the attachment bracket 687 on the outer side of the lower end of the lateral side surface 608Ba is placed so as to face the coupling hole 687a of the upper surface 680c of the tank body 680, and is coupled by the coupling bolts 687B and 688B, whereby the upper tank portion 608B can be fixed in a state of being stood on the upper side of the lower tank portion 608A.

On the front side 608Bc of the upper box section 608B, a connecting bracket 689 is provided so as to be connected forward from the outside of the cylindrical portion 685, wherein the connecting bracket 689 can be connected and fixed to a support member 605B, the support member 605B supports a swing support shaft 652, and the swing support shaft 652 has a swing axis center z2D of the grain box 605. By connecting the connecting bracket 689 to the support member 605B, the middle portion in the vertical direction of the upper tank 608B can be connected and fixed, and stable and good support is facilitated.

An opening 680e is provided in a bottom surface 680d of the tank main body 680 of the lower tank section 608A so that a part of the bottom surface 680d is opened, and an openable and closable lid 680f is provided so that the opening 680e can be closed by the lid 680 f. Accordingly, when grass clippings, dust, or the like accumulate inside the box main body 680 of the lower box portion 608A and maintenance is required, the cover member 681 is opened to extend into the inside of the box main body 680 to open the cover 680f, thereby enabling operations such as dropping and removing grass clippings, dust, or the like inside the box main body 680 to be easily and easily performed.

The suction box 608 has a lower portion on the front end side of a lower box portion 608A supported by a support bracket 613Aa, and the support bracket 613Aa extends rearward from an outer pillar 613A on the rear portion side of a box support base 613. The rear lower portion of the lower tank section 608A is supported by a tank support leg 610a, and the tank support leg 610a stands on a rear wheel support frame 610 for supporting the rear wheel 602R at the rear end portion of the vehicle body frame 601. The lower portion of the radiator 607 is also coupled and fixed to the tank support leg 610a (see fig. 65).

The upper side of the lower tank 608A is attached to an upper frame 613C of the tank support base 613, and the lower tank 608A and the heat sink 607 are coupled to each other with a sealing material 607C attached to the periphery of the ventilation surface 607 a.

(Forward and reverse selection mechanism)

The transmission system of the radiator cooling fan 670 for cooling the radiator 607 has the forward-reverse rotation selection mechanism 606 in the following structure.

As shown in fig. 71 to 73, the transmission state is selected such that the power of either one of the normal rotation transmission belt 656 and the reverse rotation transmission belt 657 is transmitted to the fan input pulley 672, and the power of the other is not transmitted to the fan input pulley 672, with the normal rotation transmission belt 656 and the reverse rotation transmission belt 657 being wound around the fan input pulley 672. As described above, the rotational direction of the fan input pulley 672 is switched between the normal rotation direction and the reverse rotation direction by transmitting the power of either the normal rotation belt 656 or the reverse rotation belt 657.

The normal rotation direction of the fan input pulley 672 is a direction in which the air blowing direction of the radiator cooling fan 670 is directed from the lateral outer side of the machine body toward the inner side, and the air suction action of the radiator cooling fan 670 acts on the radiator 607. The reverse direction is a direction in which the air blowing direction of the radiator cooling fan 670 is directed in the reverse direction. In this reverse direction, the air blowing direction of the radiator cooling fan 670 is directed outward from the inside of the housing, and dust on the air passage surface 607a of the radiator 607 existing on the lateral outer side of the housing can be blown outward.

As shown in fig. 64 to 70, a fan input pulley 672 provided on the inside of the body of the radiator 607 is supported by a fan mount 674 provided upright on the vehicle body frame 601.

The fan mount 674 has: a pillar 674A attached along a side surface of the rear wheel support frame 610 provided at the rear end of the vehicle body frame 601 on the inside of the body; and a flat plate-like seat plate 674B provided at an upper end of the support 674A. The welding is fixed with: a substrate 675 mounted on the upper surface side of the seat plate 674B, a square tubular member 676 disposed along the front-rear direction on the upper side of the substrate 675, and a mounting plate 677 raising the plate surface along the front-rear direction on the upper surface side of the square tubular member 676. The seat plate 674B and the plate surface of the base plate 675 are brought into contact with each other and detachably fixed by a fastening bolt.

As shown in fig. 68 to 73, a support shaft 671 is fixed to the mounting plate 677 so as to penetrate through the plate surface of the mounting plate 677, and the support shaft 671 pivotally supports the fan input pulley 672. That is, the connecting plate 673 is fixed by welding to the support shaft 671, the connecting plate 673 has a flange-like abutment surface opposed to the mounting plate 677, and the mounting plate 677 is bolt-coupled in a state where the connecting plate 673 is brought into abutment.

A swing plate 660 is attached to a support shaft 671 bolted to the attachment plate 677, and the swing plate 660 is attached to a portion projecting outward of the body of the attachment plate 677. The swing plate 660 has arm portions 660A and 660B extending away from the axial center p2D of the support shaft 671 in two directions. A support shaft 663a acting on the first tension pulley body 663 of the forward rotation belt 656 is provided in one arm portion 660A, and a support shaft 664a acting on the second tension pulley body 664 of the reverse rotation belt 657 is provided in the other arm portion 660B.

An operation arm 662 is coupled and fixed to one arm portion 660A, and the operation arm 662 is used to swing the swing plate 660 about the axial center p2D of the support shaft 671.

A coupling pin 661 is formed to project from the rocking plate 660, the coupling pin 661 projects toward the mounting plate 677, and a long hole 677a is formed in a predetermined range along an arc locus of the coupling pin 661 around the axis p2D of the support shaft 671 on the mounting plate 677 side so that a head portion of the coupling pin 661 can be fitted.

Therefore, when the connecting pin 661 of the swing plate 660 is fitted in a state of penetrating the long hole 677a of the mounting plate 677, the swing plate 660 can be swung around the axial center p2D of the support shaft 671 within a predetermined range of the long hole 677a in accordance with the swing operation of the operation arm 662.

As shown in fig. 63, the arm portion 660A of the swing plate 660 to which the first tension pulley body 663 is attached is located at a position away from the body outer side of the attachment plate 677 from the arm portion 660B to which the second tension pulley body 664 is attached.

As shown in fig. 70 to 73, an arm portion 660A to which the first tension pulley body 663 is attached is provided with an engaging piece 666a, the engaging piece 666a engages with a coil spring 666 (corresponding to an urging means), and the coil spring 666 urges the normal rotation belt 656 to rotate toward the tension side (clockwise direction in fig. 62). The other end of the coil spring 666 is connected to a support 674A of the fan mount 674, and the coil spring 666 is stretched so as to be applied to the swing plate 660 so as to always bias the normal rotation transmission belt 656 in tension.

The reversible belt 657 is provided to wrap around not only the second tensioner pulley 664 but also the third tensioner pulley 665.

The third tension wheel body 665 is pivotally supported on a support shaft 665a provided on the mounting plate 677, and is provided on the mounting plate 677 so as to be positionally fixed, without being positionally changed by the swinging operation of the operation arm 662.

As shown in fig. 71 and 72, the second sheave body 664 and the third sheave body 665 are disposed so as to be dispersed on both sides of a virtual line segment L1D, where the virtual line segment L1D connects the shaft center p1D of the relay output pulleys 655b and 655c as the driving rotating bodies and the shaft center p2D of the support shaft 671 as the rotation center of the fan input pulley 672 as the input rotating body.

The forward rotation belt 656 is wound over the relay output pulley 655b on the outer side of the machine body, the fan input pulley 672, and the first tension pulley body 663 among the relay output pulleys 655b and 655c as the driving rotating bodies. The relay output pulley 655b, the fan input pulley 672, and the first tension pulley 663 are disposed so as to contact the inner circumferential side of the forward rotation belt 656.

Therefore, as shown in fig. 71, when the operation arm 662 is operated to the "forward rotation" position shown by the solid line, the swing plate 660 swings clockwise, moving the first tension wheel body 663 to the side where the forward rotation transmission belt 656 is tensioned. Even if the operation of the operation arm 662 is released by the biasing action of the coil spring 666, the position of the first tension pulley body 663 can be maintained in the normal rotation transmission state.

At this time, the arm portion 660B of the swing plate 660 supporting the second tension pulley body 664 swings to the side where the reverse belt 657 is loosened (swings clockwise), and the power transmission of the reverse belt 657 is not performed.

The reverse belt 657 is wound over the relay output pulley 655c on the inner side of the machine body, the fan input pulley 672, the second sheave 664, and the third sheave 665 of the relay output pulleys 655b and 655c as the driving rotating bodies.

The reverse transmission belt 657 is wound such that the relay output pulley 665c, the second tension pulley 664, and the third tension pulley 665 contact the inner peripheral side of the reverse transmission belt 657, and the fan input pulley 672 contacts the outer peripheral side of the reverse transmission belt 657.

Therefore, as shown in fig. 72, when the operating arm 662 is operated to the "reverse" position, the swing plate 660 swings in the counterclockwise direction against the urging force of the coil spring 666, moving the second sheave body 664 to the side where the reverse transmission belt 657 is tensioned. The reverse drive belt 657 tensioned in this state assumes a reverse drive state.

At this time, the arm portion 660A of the swing plate 660 supporting the first tension wheel body 663 swings to the side where the normal rotation belt 656 is loosened (swings counterclockwise), and the power transmission of the normal rotation belt 656 is not performed.

As described above, the forward rotation power transmission mechanism includes the relay output pulley 655b, the fan input pulley 672, the first tension pulley body 663, and the forward rotation belt 656, and the reverse rotation power transmission mechanism includes the relay output pulley 655c, the fan input pulley 672, the second tension pulley body 664, the third tension pulley body 665, and the reverse rotation belt 657.

The forward/reverse rotation selection mechanism 606 has a tension clutch that can selectively select the forward rotation transmission belt 656 of the forward rotation power transmission mechanism and the reverse rotation transmission belt 657 of the reverse rotation power transmission mechanism by swinging the swing plate 660 by operating the operation arm 662, and can transmit or block power by tightening or loosening the belts.

In addition, in the swing operation of the swing plate 660 by the operation of the operation arm 662, even if the operation force of the operation arm 662 is released, the switching state to the normal rotation side can be continued by the biasing force of the coil spring 666, while the operation to the reverse rotation side is continued only during the swing operation of the swing plate 660 by the operation of the operation arm 662, and when the operation of the operation arm 662 is released, the swing operation is automatically returned to the normal rotation driving state by the biasing force of the coil spring 666.

Reference numeral 667 shown in fig. 68 to 73 denotes a rod-shaped retaining guide integrally provided on the swing plate 660, and 668 denotes a plate-shaped retaining guide bent in an L-shape. Further, reference numeral 677b denotes a bar-shaped anti-slip guide provided on the mounting plate 677. These components perform the retaining operation of the forward rotation belt 656 or the reverse rotation belt 657.

The forward rotation belt 656 and the reverse rotation belt 657 are provided with a belt guide 669 as a guide member for guiding the forward rotation belt 656 and the reverse rotation belt 657, and the forward rotation belt 656 and the reverse rotation belt 657 are wound around a pair of relay output pulleys 655b and 655c provided on the relay shaft 655 side and a fan input pulley 672 on the radiator cooling fan 670 side. The belt guide 669 restricts the displacement amount of the forward rotation belt 656 and the reverse rotation belt 657 in the direction orthogonal to the rotation direction of the forward rotation belt 656 and the reverse rotation belt 657 as endless rotating bodies wound around the relay output pulleys 655b and 655c as input rotating bodies.

When the belt guide 669 does not contact the forward rotation belt 656 or the reverse rotation belt 657 that is tensioned in the driving state and slack of a predetermined amount or more is generated, the belt guide 669 supports the forward rotation belt 656 and the reverse rotation belt 657 from below. With the above configuration, the loose reverse rotation belt 657 or the normal rotation belt 656 can be prevented from hanging down largely and contacting the normal rotation belt 656 or the reverse rotation belt 657 in driving. This can reduce the possibility that the slack reverse rotation belt 657 or the normal rotation belt 656 will be worn away from the normal rotation belt 656 or the reverse rotation belt 657 during driving.

Specifically, as shown in fig. 71, 72, and 74, the tape guide 669 includes a first support portion 669a and a second support portion 669b, the tape guide 669 does not come into contact with the reverse rotation belt 657 during driving as indicated by the broken line, and when the forward rotation belt 656 is driven and the reverse rotation belt 657 is in a non-driving state, the first support portion 669a and the second support portion 669b support the slack side and the tight side of the reverse rotation belt 657 on the lower side as indicated by the solid line, respectively, when slack of a predetermined amount or more occurs. On the reverse belt 657 side, the side of the reverse belt 657 that contacts the fan input pulley 672 on the outer peripheral side is a tight side, and the side of the reverse belt 657 that contacts the third tension pulley 665 on the inner peripheral side is a loose side.

The tape guide 669 has a third support portion 669c for supporting the slack side of the normal rotation belt 656 from below as shown by a broken line when slack of a predetermined amount or more is generated on the slack side of the normal rotation belt 656 side.

By providing the first support portion 669a, the second support portion 669b, and the third support portion 669c as described above, when either the forward rotation belt 656 or the reverse rotation belt 657 is loosened as the forward rotation and reverse rotation are switched, the loosened forward rotation belt 656 or reverse rotation belt 657 can be prevented from hanging down unnecessarily.

As shown in fig. 71 and 72, an adjustment wheel body 679 for relieving is provided on the tension side of the forward rotation transmission belt 656 in addition to the belt guide body 669.

The adjustment wheel body 679 is attached so as to be vertically displaceable with respect to a support member 678 that is erected from a front end portion of a square tubular member 676 fixed to the fan mount 674 toward the upper frame 613C of the case support 613.

The adjustment wheel body 679 may be positioned below the tension side of the forward rotation belt 656, and when the forward rotation belt 656 slacks, the adjustment wheel body 679 may be positioned at a position where the slack of the forward rotation belt 656 can be restricted from sagging. In addition, in the case where the forward rotation belt 656 is long and the forward rotation belt 656 is extended and loosened, the adjustment wheel body 679 may be able to adjust the position at which the forward rotation belt 656 is placed in tension, without the need to bring the adjustment wheel body 679 into contact with the forward rotation belt 656 in the tensioned state.

The relay shaft 655 is attached to the upper frame 613C of the box support base 613 in a suspended state via the attachment bracket 613D.

As shown in fig. 60, 75, and 76, a retaining guide 658 is provided to a pair of relay output pulleys 655b and 655c provided on the relay shaft 655.

The retaining guide 658 is provided so as to face the outer peripheries of the relay output pulleys 655b and 655c and to extend along the outer peripheries of the relay output pulleys 655b and 655c on the front side of the machine body when viewed from the side. The retaining guide 658 is formed by bending a plate-like material into a polygonal shape when viewed from the side and is formed along substantially half the outer circumference of the relay pulleys 655b and 655 c.

The polygonal retaining guide 658 is bolted to the mounting bracket 613D via a pair of mounting pieces 658a, 658a provided on both sides of the corner of the upper end.

As shown in fig. 76, the upper end and the lower end of the polygonal retaining guide 658 are connected to the relay output pulleys 655b and 655c and the relay shaft 655 by a bent U-shaped bar 658b, which is a winding shape, thereby increasing the strength of the retaining guide 658.

(other embodiment 1 of the fourth embodiment)

In the above embodiment, the grain tank 605 disposed above the threshing device 604 is swingable in an inclined manner about a swing axis z2D provided at one end side in the left-right direction, and an openable grain discharge port 605A is provided at the side where the swing axis z2D is provided, so that grains can be discharged in the inclined swing posture. The invention is not so limited.

For example, as shown in fig. 78, instead of providing the grain tank 605 with the openable grain outlet 605A, a discharger 605C for discharging the stocked material may be provided to discharge the stocked material.

With this configuration, grains can be discharged without providing the grain tank 605 with the grain discharge port 605A that can be opened and closed or providing the discharge hydraulic cylinder 653 that tilts the grain tank 605.

However, even in the grain box 605 having the discharger 605C, the stored material existing at the bottom of the box body 651 can be smoothly collected to the side of the discharger 605C by providing the discharge cylinder 653.

The discharger 605C has: a vertical conveying cylinder 710 rising from the front wall part of the grain box 605 to the direction of lifting the stored object; a horizontal transfer cylinder 711 extending in the horizontal tilting direction from the upper end of the vertical transfer cylinder 710; and a discharge unit 712 for discharging the stored material from the front end of the transverse transport cylinder 711.

The lateral transfer cylinder 711 is capable of changing the posture between a discharge posture in which the longitudinal direction of the lateral transfer cylinder 711 is directed outward in the lateral direction of the automatic traveling machine body and the discharge portion 712 is positioned away from the lateral side of the automatic traveling machine body, and a storage posture in which the longitudinal direction of the lateral transfer cylinder 711 is directed rearward along the automatic traveling machine body, as shown in fig. 78.

When the lateral transfer cylinder 711 assumes the storage posture as described above, the discharge portion 712 extends above the upper box portion 608B of the intake box 608, and is positioned behind the upper box portion 608B and above the grass discharge processing device 616. At this time, the upper tank 608B is narrower than the lower tank 608A, and the rear surface side of the upper tank 608B is a deformed trapezoid inclined downward rearward, so that the length of the lateral transport cylinder 711 in the front-rear direction can be set as short as possible, and the size can be effectively reduced.

The other structures may be the same as those of the above embodiment.

(other embodiment 2 of the fourth embodiment)

In the above embodiment, the upper tank 608B and the lower tank 608A are separately configured as the intake tank 608, but the present invention is not limited to this. For example, the upper tank 608B and the lower tank 608A may be formed of an integral tank.

The shapes of the upper tank 608B and the lower tank 608A are not limited to rectangular tank shapes, and appropriate shapes such as triangular cylindrical shapes, polygonal cylindrical shapes, and cylindrical shapes can be used.

The other structures may be the same as those of the above embodiment.

(other embodiment 3 of the fourth embodiment)

In the above embodiment, the upper tank 608B has a vertically long shape with a width smaller than that of the lower tank when viewed along the axial direction of the radiator cooling fan 670. For example, the upper portion and the lower portion may have the same width, and conversely, the upper portion may have a shape wider than the lower portion.

The other structures may be the same as those of the above embodiment.

(other embodiment 4 of the fourth embodiment)

In the above embodiment, the air inlet 684 of the upper tank portion 608B is formed in all of the front, rear, left, and right surfaces, but the present invention is not limited thereto. For example, the inlet 684 may be provided only on a partial surface of front, rear, left, and right surfaces.

The other structures may be the same as those of the above embodiment.

(other embodiment 5 of the fourth embodiment)

In the above-described embodiment, the harvesting section reverse rotation operation member 706 and the fan reverse rotation operation member 707 are operated in the reverse rotation state only during the pulling operation, and are returned to the normal rotation state when the pulling operation is released, but the present invention is not limited thereto.

For example, although not shown, a configuration may be adopted in which the state can be alternately switched between the reverse rotation state and the normal rotation state each time the pulling operation is performed.

The other structures may be the same as those of the above embodiment.

(other embodiment 6 of the fourth embodiment)

In the above embodiment, the front wheels 602F are constituted by non-steered wheels and the rear wheels 602R are constituted by steered wheels as the running device 602, but the present invention is not limited to this, and for example, the front wheels 602F may be used as steered wheels and the rear wheels 602R may be used as non-steered wheels. The front wheels 602F and the rear wheels 602R may be both configured by steered wheels.

The other structures may be the same as those of the above embodiment.

(other embodiment 7 of the fourth embodiment)

In the above embodiment, the front wheels 602F are used as the drive wheels constituted by the non-steerable wheels and the rear wheels 602R are constituted by the non-driven steerable wheels as the running device 602, but the present invention is not limited to this.

For example, the front wheels 602F may be used as non-driven steerable wheels and the rear wheels 602R may be used as drive wheels configured from non-steerable wheels, or both the front wheels 602F and the rear wheels 602R may be configured from steerable wheels and both the front wheels 602F and the rear wheels 602R may be driven.

The other structures may be the same as those of the above embodiment.

(other embodiment 8 of the fourth embodiment)

In the above embodiment, the front traveling unit is constituted by the front wheels 602F constituted by the non-steered wheels, and the rear traveling unit is constituted by the rear wheels 602R constituted by the steered wheels, but the present invention is not limited to this, and for example, the front traveling unit may be constituted by a half-track type crawler traveling device, and the rear traveling unit may be constituted by the rear wheels 602R constituted by the steered wheels. Conversely, the front traveling unit may be formed by front wheels 602F formed by steerable wheels, and the rear traveling unit may be formed by a semi-crawler type crawler travel device.

In this case, the rear wheels 602R and the front wheels 602F formed of steered wheels may be non-driven to drive the semi-crawler type crawler travel device, or the semi-crawler type crawler travel device may be driven together with the rear wheels 602R and the front wheels 602F formed of steered wheels.

The other structures may be the same as those of the above embodiment.

(other embodiment 9 of the fourth embodiment)

In the above embodiment, the cab 615 is provided as the driver part, but the present invention is not limited to this. Instead of the cab 615 as the driver's part, only the steering handle 615a and the driver's seat 615b may be provided.

The other structures may be the same as those of the above embodiment.

(other embodiment 10 of the fourth embodiment)

In the above embodiment, the output pulley 630 as the engine output rotating body, the input/output pulley 622 as the input rotating body and the output rotating body, and the threshing input pulley 641b as the threshing-side rotating body are shown, but the present invention is not limited to the output or input rotating body being constituted by pulleys, and may be constituted by sprockets, for example. In this case, a transmission chain may be used instead of the transmission belts 632A and 632B as the endless rotating belt for transmission. In addition, in the case of a transmission structure using an endless rotating belt in another place such as the threshing device 604, a transmission chain may be used instead of the transmission belt.

The other structures may be the same as those of the above embodiment.

(other embodiment 11 of the fourth embodiment)

In the above-described embodiment, the grass discharge processing apparatus 616 having the grass discharge chopper capable of chopping grass is shown as the grass discharge unit, but the present invention is not limited thereto. For example, a cutting device different from the weed chopper may be provided, or a drop discharge device may be provided, or only a weed discharge outlet through which the weed is discharged may be provided.

(other embodiment 12 of the fourth embodiment)

In the above-described embodiment, a general-type combine harvester is shown as an example of the harvester, but the present invention is not limited thereto, and may be a half-feed type combine harvester. Further, the present invention is not limited to a combine harvester for harvesting grains such as rice, wheat, and corn, and may be a harvester for harvesting beans such as soybean, and flowers such as vegetables.

The above-described embodiments can be combined with each other without contradiction. The scope of the present invention is not limited to the embodiments described above.

Description of the reference numerals

(first embodiment)

3: an engine;

6: a forward and reverse rotation selection mechanism;

7: a heat sink;

9: a lateral cover body;

34A: an upstream-side transmission belt (power-side endless rotating belt);

34B: a downstream-side transmission belt (endless rotating belt);

35 a: a relay input pulley (drive rotating body);

35 b: a relay output pulley (drive rotating body);

35 c: a relay output pulley (drive rotating body);

36: a forward rotation transmission belt (an annular rotation belt of a forward rotation power transmission mechanism);

37: a reverse belt (an endless belt of a reverse power transmission mechanism);

60: a swing arm;

62: an operating lever;

63: a first tension pulley body (pulley body);

64: a second tension pulley body (pulley body);

65: a third tension pulley body (pulley body);

66: a coil spring (urging mechanism);

70: a radiator cooling fan;

72: a fan input pulley (input rotary body);

LA: a virtual line segment;

p 1A: an axis;

p 2A: an axis;

(second embodiment)

202: a running device;

203: an engine;

204: a threshing device;

220: a gearbox;

221: an input shaft;

222A: a first rotator portion (input rotator);

222B: a second rotator portion (output rotator);

223: a continuously variable transmission;

230: an output pulley (engine output rotating body);

231: an output shaft;

232: a first transmission belt (engine power transmission unit);

233: a second belt (power transmission unit for threshing);

241 a: a windmill shaft;

241 b: a threshing input pulley (threshing-side rotating body);

(third embodiment)

308: a threshing device;

310: an engine;

312: a grass discharge processing device (post-processing device);

313: a harvesting part;

314: a feeder;

327: a threshing cylinder;

329: a threshing chamber;

330: a sorting processing unit;

381: a windmill;

384: a primary screw (processed object conveying mechanism);

387: a secondary screw (processed object conveying mechanism);

510: a rotating shaft (intermediate shaft);

553: a transmission mechanism for driving the machine body;

554: an input shaft for running;

555: a first drive pulley (drive rotating body);

556: a relay shaft;

557: a driven rotary body;

558: a relay transmission mechanism;

559: a distribution transmission mechanism;

563: an input pulley (input rotating body);

564: an output pulley for a threshing cylinder (an output rotary body for a threshing cylinder);

565: an output pulley for a feeder (an output rotary body for a feeder);

566: a conveyance output pulley (a processed object conveyance output rotating body);

574: a second drive pulley (post-processing rotating body);

575: a transmission mechanism for aftertreatment;

X2C: an axis;

(fourth embodiment)

603: an engine;

603A: a flywheel;

603C: a compressor;

604: a threshing device;

616: a grass discharge treatment device;

630: an output pulley;

630A: an installation part;

630B: a pulley groove;

631 b: a third output pulley (a pulley for a fan);

631 c: a fourth output pulley (a pulley for a compressor);

638B: a fourth transmission belt (endless rotating belt);

646: a transmission belt;

646A: a driven pulley (input rotary body);

654: a tensioning mechanism;

654 c: a swing arm;

654 e: a freely movable side pulley (rotating body);

656: a forward rotation transmission belt (annular rotating body);

657: a reverse rotation belt (endless rotating body);

669: a tape guide (guide member);

672: the fan input pulley (input rotary body).

Claims (3)

1. A working machine is characterized in that a working machine body,

comprising:

a heat sink;

a radiator cooling fan; and

a driving device for driving the radiator cooling fan by the power of the engine,

the driving device is provided with two systems of power transmission mechanisms, which are respectively: a forward rotation system power transmission mechanism capable of transmitting a forward rotation force through an annular rotation belt; and a reverse rotation system power transmission mechanism capable of transmitting a reverse rotation force via another endless rotation belt, and the drive device further includes a forward/reverse rotation selection mechanism capable of selecting one of the powers of the power transmission mechanisms of the two systems and transmitting the selected power to the input rotation body of the radiator cooling fan.

2. A combine harvester is characterized in that,

comprising:

an engine;

a transmission for transmitting a driving force to a traveling device; and

a threshing device is arranged on the upper portion of the threshing device,

The power of the engine is transmitted to the threshing device through an input shaft branch of the gearbox.

3. A combine harvester is characterized in that,

comprising:

a feeder for carrying backward the crops harvested by the harvesting part in front of the body; and a threshing device for threshing the crop carried by the feeder,

the threshing device is provided with: a threshing chamber for threshing the crops by a rotary threshing cylinder; and a sorting unit located below the threshing chamber for sorting the threshed objects,

the combine harvester is provided with: an intermediate shaft that penetrates the interior of the threshing device and transmits power from an engine to the threshing device on the side opposite to the engine; a relay shaft distinct from the intermediate shaft; a relay transmission mechanism that transmits power from a driving rotating body attached to the intermediate shaft to a driven rotating body attached to the relay shaft; and a distribution transmission mechanism that distributes power from the driven rotating body to the threshing cylinder and the feeder.

Images