CN108419506B - Combine harvester - Google Patents

Abstract

Provided is a combine harvester which facilitates maintenance work, and which comprises: the harvester is provided with a harvesting part for harvesting and conveying the planted straw to the rear, a driving motor (7) positioned at one side part close to the transverse width direction of the machine body, a harvesting input shaft (103) extending along the transverse width direction of the machine body, and an output transmission mechanism (104) for transmitting the power from the motor (7) to the other side part of the transverse width direction of the machine body of the harvesting input shaft (103).

Description

Combine harvester

The application is a divisional application of Chinese patent application entitled combine harvester and having application number 201310452251.9 filed by Chinese patent office in 2013, 9, 26 and 26.

Technical Field

The invention relates to a combine harvester for harvesting standing grain stalks while a machine body runs.

Background

In a conventional combine harvester, there is a combine harvester configured as follows: a harvesting part for harvesting the vertical grain rods and conveying the vertical grain rods to the rear is arranged at the front part of the machine body, the harvested grain rods are threshed by a threshing part arranged at the rear part of the machine body, and the harvesting part and the threshing part are driven by the power of an engine arranged below a riding driving part positioned at the right front part of the machine body. Then, the power of the engine is transmitted to the right end of the machine body, which is the side of the input shaft where the engine is located, to the input shaft extending in the transverse width direction of the machine body (see, for example, patent document 1). In this configuration, the power of the engine is output to the cutting input shaft in the lateral attitude on the vertical axis of the cutting unit, and a good transmission state can be maintained regardless of the vertical operation of the cutting unit. The power of the engine is transmitted to the cutting portion after being shifted by a cutting transmission device, for example, a continuously variable transmission device, which is disposed on the inner side in the lateral width direction of the engine body and arranged in the lateral direction. That is, the engine and the cutting transmission are disposed in a state of being respectively close to one side in the lateral width direction of the machine body.

Patent document 1: japanese unexamined patent application publication No. 2008-72991

In the above-described conventional structure, the power of the motive power is transmitted to the end portion on the right side of the machine body, which is the side where the engine of the input shaft is located, and therefore, the following disadvantages are involved:

in a transmission mechanism for transmitting power of an engine to a harvesting input shaft, power is transmitted by winding an endless rotating belt such as a transmission belt or a transmission chain in a tensioned state. Since the endless rotating belt is damaged or destroyed by long-term use, maintenance work such as inspection, repair, and replacement is required.

However, in the above-described conventional configuration, the transmission mechanism for transmitting power to the input shaft is disposed in a narrow portion on the far side of the body from the left end in the lateral width direction of the body, on the side of the engine where the input shaft is cut, that is, on the far side of the body. Since the riding operation section is provided on the right side of the machine body where the input shaft is cut, maintenance work cannot be performed from the right side outward in the lateral width direction of the machine body.

As a result, the operator cannot insert the handle from the laterally outward side of the machine body to perform the operation, and therefore, the operator needs to perform a complicated operation such as separating the cutting unit from the traveling machine body to open the portion where the transmission mechanism is located, which requires time and labor, and the operator needs to perform the operation at a narrow portion in the back of the machine body, which makes it difficult to perform the maintenance operation as described above.

In the combine harvester configured to be able to move the cutting unit to the maintenance position laterally outward by rotating the cutting unit about the longitudinal axis located on the left side of the machine body, it is necessary to remove the endless rotating belt for transmitting power to the cutting input shaft when the cutting unit is switched to the maintenance position. However, in the above-described conventional structure, since the transmission mechanism is located in the narrow portion on the back side of the machine body away from the left end portion in the lateral direction of the machine body as described above, there is a disadvantage that the operation of detaching the endless rotating belt when the cutting portion is switched to the maintenance position is troublesome.

Further, with the above configuration, the drive speed of the cutting unit with respect to the travel speed of the machine body can be changed and adjusted by the cutting transmission device in accordance with, for example, the type of crop to be cut, the difference in the lodging state of the crop, and the like, and appropriate cutting work can be performed regardless of, for example, the type of crop and the difference in the lodging state of the crop.

Further, the above-described conventional configuration has a disadvantage that it is difficult to perform maintenance work on a transmission mechanism for transmitting the power of the motive power to the harvesting transmission device, a transmission mechanism for transmitting the power shifted by the harvesting transmission device to the harvesting unit, and the like.

Specifically, the above-described transmission mechanism is provided with an endless rotating belt such as a transmission belt, and the endless rotating belt is damaged or destroyed by long-term use, and therefore, maintenance work such as inspection or repair and replacement is required. In addition, not only the transmission mechanism but also the cutting transmission device may require maintenance work such as repair or adjustment.

However, in the above-described conventional structure, since the cutting transmission is located on the inner side in the lateral width direction of the machine body, the cutting transmission and the transmission mechanism are located in a narrow portion on the inner side of the machine body which is far apart from the outer end in the lateral width direction of the machine body. As a result, the operator cannot insert the hand from the outside in the lateral width direction of the machine body and perform the operation, and therefore, the operator needs to separate the cutting unit from the traveling machine body in a troublesome manner to open the portion where the transmission mechanism is located, and the like.

Disclosure of Invention

The invention aims to provide a combine harvester which is easy to maintain.

The invention provides a combine harvester, which is characterized in that the combine harvester comprises: the harvester is provided with a harvesting part for harvesting and conveying the planted vertical grain rod to the rear, a driving motor positioned at one side part close to the transverse width direction of the machine body, a harvesting input shaft extending along the transverse width direction of the machine body, and an output transmission mechanism for transmitting the power from the motor to the other side part of the transverse width direction of the machine body of the harvesting input shaft.

According to the present invention, the driving engine is disposed in a state of being located close to one side in the transverse width direction of the machine body, and the power of the driving engine is transmitted to the other side in the transverse width direction of the machine body of the input shaft extending in the transverse width direction of the machine body via the output transmission mechanism.

That is, the output transmission mechanism is disposed at a position corresponding to an end portion of the input shaft opposite to the engine in the lateral width direction of the machine body. However, in the combine harvester, the end portion located on the opposite side in the lateral width direction of the machine body with respect to the engine is not large-sized and is disposed in a state facing the outside in the lateral direction of the machine body because the end portion constitutes a conveying path for conveying the harvested straw to the threshing portion located behind.

As a result, when performing maintenance work of the transmission mechanism from the lateral outside of the body, or when removing the endless belt of the transmission mechanism, the transmission mechanism is located at a position close to the operator, so that the operator can easily approach his hand to the position to be maintained, and the work can be performed in a simple state.

Therefore, the combine harvester which is easy to maintain can be provided.

In the present invention, it is preferable that power is transmitted from an intermediate position of the harvesting input shaft in the transverse width direction of the machine body to the harvesting unit via a relay transmission mechanism and a forward/backward transmission shaft extending in the forward/backward direction of the machine body.

According to this configuration, power is transmitted from the intermediate position in the transverse width direction of the machine body of the harvesting input shaft extending in the transverse width direction of the machine body to the front-rear direction drive shaft extending in the front-rear direction of the machine body via the relay transmission mechanism, and power is transmitted from the front-rear direction drive shaft to the harvesting portion.

When the cutting part swings and moves up and down around the axis of the cutting input shaft, power can be transmitted to the cutting part through the front and back direction transmission shaft without changing the position of the cutting input shaft. That is, the cutting unit can be supported to be freely lifted and lowered, and the transmission state of the cutting unit can be maintained well.

In the present invention, it is preferable that a supply and conveyance device for supplying and conveying the reaping straw from the conveyance terminal end portion of the reaping section to the threshing supply chain is disposed, and an input transmission rotating body of the output transmission mechanism and a supply and conveyance transmission mechanism for transmitting power from the reaping input shaft to the supply and conveyance device are disposed on the other side portion in the transverse width direction of the machine body of the reaping input shaft.

According to this configuration, the input transmission rotating body and the supply conveyance transmission mechanism are provided on the other side of the housing in the lateral width direction of the harvesting input shaft, so that power is input to the harvesting input shaft via the input transmission rotating body to transmit the operation to the harvesting section, while power is transmitted to the supply conveyance device via the supply conveyance transmission mechanism.

In this way, the supply and conveyance device is driven by the power transmitted to the harvesting input shaft, and the supply and conveyance device is driven at a speed corresponding to the driving speed of the harvesting unit, so that the harvesting grain stalks can be smoothly received from the harvesting unit to the threshing supply chain. Further, since the input transmission rotating body and the supply/conveyance transmission mechanism are provided at the other side in the lateral width direction of the machine body, maintenance work corresponding to the input transmission rotating body and the supply/conveyance transmission mechanism can be easily performed.

In the present invention, it is preferable that the supply conveyance transmission mechanism is located on the other side of the input shaft in the transverse width direction of the machine body, and is located on the inner side of the supply conveyance device in the transverse width direction of the machine body.

According to this configuration, since the supply/conveyance transmission mechanism to which the power of the engine is transmitted is located on the inner side in the lateral width direction of the machine body than the supply/conveyance device, for example, compared to a case where the supply/conveyance transmission mechanism is located on the outer side in the lateral width direction of the machine body, the engine and the supply/conveyance transmission mechanism can be brought closer to each other in the lateral width direction of the machine body, and the transmission path can be shortened accordingly.

In the present invention, it is preferable that the input transmission rotating body is located on the other side of the input shaft in the transverse width direction of the machine body, and is located on the outer side of the supply and conveyance device in the transverse width direction of the machine body.

According to this configuration, since the input transmission rotating body is located further outward in the lateral width direction of the machine body than the supply and conveyance device, the input transmission mechanism including the endless rotating belt for transmitting power to the input transmission rotating body is located outward in the lateral width direction of the machine body.

As a result, the maintenance work of the input transmission mechanism for transmitting power to the input shaft can be easily performed from the outside of the lateral side of the machine body.

In the present invention, it is preferable that the supply and conveyance transmission mechanism is configured as a gear-mesh transmission mechanism, and the supply and conveyance transmission case covering the supply and conveyance transmission mechanism has an end-side support cylinder portion that supports an outer peripheral portion of the other end portion of the housing in the lateral width direction of the harvesting input shaft.

According to this configuration, the supply/conveyance transmission case has an end portion side support cylinder portion that supports the outer peripheral portion of the other end portion in the lateral width direction of the machine body of the cutting input shaft. That is, the supply/conveyance transmission box necessary for covering the supply/conveyance transmission mechanism as the gear engagement transmission mechanism is effectively used, and the outer peripheral portion of the harvesting input shaft can be supported with a simple structure without complicating the structure by disposing other dedicated members for supporting the harvesting input shaft, and the like.

In the present invention, it is preferable that the end portion side support cylindrical portion is fitted and connected to a cylindrical housing which covers an outer peripheral portion of the input shaft closer to an inner side in the transverse width direction of the machine body than the other end portion in the transverse width direction of the machine body so as to be relatively rotatable.

When the cutting part swings and moves up and down around the axis of the cutting input shaft, the cylindrical shell rotates together with the lifting and the moving of the cutting part. In this case, according to this configuration, since the cylindrical housing can be relatively rotated between the end portion side support cylindrical portion, the cylindrical housing can be allowed to rotate while the end portion side support cylindrical portion supports the outer peripheral portion of the other end portion in the transverse width direction of the machine body of the cutting input shaft, and the cutting portion can be satisfactorily lifted and lowered.

In the present invention, it is preferable that the supply and conveyance device includes a plurality of guide wheel bodies, an annular rotating belt wound around the plurality of guide wheel bodies, and a conveyance support body rotatably supporting the plurality of guide wheel bodies, the conveyance support body is connected and fixed to the supply and conveyance transmission case, and the supply and conveyance transmission case is connected and fixed to the body side support portion, so that the position of the supply and conveyance device is held at a conveyance operation position, and the supply and conveyance device rotates relative to the tubular housing integrally with the supply and conveyance transmission case when the connection and fixation between the supply and conveyance transmission case and the body side support portion is released, and changes the posture to a maintenance position so as to be freely changeable.

According to this configuration, the supply and conveyance device is configured such that the endless rotating belt is wound over a plurality of guide wheel bodies supported by the conveyance support body, and the conveyance support body is connected and fixed to the supply and conveyance transmission case. On the other hand, the supply conveyance transmission case is held in a fixed position by being fixed to the body side support portion, and is rotatable relative to the tubular case when the fixing to the body side support portion is released.

When the supply conveyance transmission box is coupled and fixed to the body-side support portion, the position of the supply conveyance device is held at the conveyance action position. When the supply conveyance transmission case and the body-side support portion are released from the coupling fixation and are relatively rotated with respect to the cylindrical case, the supply conveyance device and the supply conveyance transmission case can be integrally rotated to change the posture to the maintenance operation position.

In the present invention, it is preferable that the cutting device further includes a body-side rotation holding member rotatably supported on the frame about a longitudinal axis, the cutting portion is coupled to the body-side rotation holding member, and is supported on the body so as to be swingable about the longitudinal axis between a cutting operation position and an open position where the body is moved laterally outward in front of the body and the front of the body is open, and the supply conveyance transmission case is coupled to and fixed to the body-side rotation holding member serving as the body-side support portion, and thereby is held in the conveyance operation position.

According to this configuration, the cutting section is connected to the body-side rotation holding member, is supported by the body so as to be swingable between the cutting work position and the open position, is set in the cutting work position when performing normal cutting work and road traveling, and is switched to the open position when performing maintenance work on a transmission mechanism or the like located in an inner deep portion of the front portion of the body. Thus, the cutting part moves to the front and the transverse outer side of the machine body to form a state that the front part of the machine body is opened, so that the maintenance operation is easy.

Since the supply/conveyance transmission case is fitted and connected to the tubular housing so as to be relatively rotatable, the supply/conveyance transmission case can swing together with the tubular housing about the vertical axis in conjunction with the switching of the cutting section to the open position.

The supply/conveyance transmission box is connected and fixed to the body-side rotation holding member, thereby holding the position of the supply/conveyance device at the conveyance action position. When the connection and fixation between the supply and conveyance transmission box and the body-side rotation holding member is released, the supply and conveyance transmission box can rotate relative to the cylindrical case, and the posture of the supply and conveyance device is changed to the maintenance position.

When the harvesting section is at the operation position, the position of the supply and conveyance device is maintained at the conveyance action position, so that the transporting process of the harvested rice stems can be performed well. Thus, the supply and conveyance device can be swung around the vertical axis together with the cutting section without interfering with other members on the machine body side.

In the present invention, it is preferable that the supply and conveyance device includes a plurality of guide wheel bodies, a conveyance endless rotating belt wound around the plurality of guide wheel bodies, a conveyance support body rotatably supporting the plurality of guide wheel bodies, and a fixing member for fixing and supporting the conveyance support body to a fixing member on the machine body side.

According to this configuration, in the supply and conveyance device, the endless rotating belt is wound over the plurality of guide wheel bodies supported by the conveyance support body, and the conveyance support body is connected to the fixing member fixed to the machine body side by the fixing connecting member.

In this way, the plurality of guide wheels are stably supported by the conveying support body connected to the fixed member fixed to the machine body side, and the annular rotating belt is wound around the plurality of guide wheels, so that the supply and conveying device can convey the reaping straw in a stable state.

In the present invention, it is preferable that the machine body side fixing member is a tank that stores working oil.

With this configuration, the conveying support body supplied to the conveying device is connected and fixed to the tank storing the hydraulic oil by the fixing connecting member. Incidentally, in the combine harvester, since a hydraulic machine is often used, there is an oil tank for storing working oil.

Therefore, the supply and transport device can be fixedly supported by a simple structure without complicating the structure such as providing a dedicated frame for supporting the supply and transport device by effectively using the oil tank.

In the present invention, it is preferable that the fixing coupling member is coupled and fixed to the oil tank at a plurality of positions in a state in which coupling directions are different.

According to this structure, the fixing coupling member is coupled and fixed to the oil tank at a plurality of positions in different directions from each other. For example, the plurality of portions are connected and fixed in different directions from each other by connecting and fixing the portions in the vertical direction at any one of the plurality of portions and connecting and fixing the portions in the horizontal direction at the other portions.

However, when the feeding and conveying device repeatedly performs the conveying operation of the harvested straw, the connecting portion of the fixing connecting member receives forces in various directions, such as the vertical direction and the horizontal direction. That is, if there is only one direction of connection of the fixing connection member, there is a possibility that the connection portion may be loosened when a force in a direction different from the direction is applied.

In contrast, in the present configuration, since the plurality of portions are connected and fixed in the different directions from each other as described above, there is less possibility that the loosening occurs even if the force in the various directions is received, and therefore, the supply and conveyance device can be firmly connected and fixed.

In the present invention, it is preferable that the supply and conveyance transmission mechanism includes an upstream transmission rotating body disposed on the harvesting input shaft, a downstream transmission rotating body interlocked with the input shaft of the supply and conveyance device, and an annular rotating belt wound around each transmission rotating body in a straddling manner, the annular rotating belt being wound around the upstream transmission rotating body and the downstream transmission rotating body via an opening formed in a cylindrical case covering an outer peripheral side of the harvesting input shaft.

According to this configuration, the power is transmitted from the harvesting input shaft to the input shaft of the supply and conveyance device via the endless rotary belt, thereby rotationally driving the supply and conveyance device. The endless rotating belt extends outward of the cylindrical housing through an opening formed in the housing, and transmits power to the supply and conveyance device. Thus, the opening through which the endless rotating belt passes is formed in the cylindrical housing, so that the power for cutting the input shaft can be directly used to drive the feeding and conveying device, and the driving structure can be simplified.

Incidentally, if an opening is not formed in the cylindrical housing, for example, if a dedicated power take-out section for taking out power from the shaft end of the input shaft is disposed and the power is transmitted to the supply and conveyance device, there is a possibility that the transmission structure becomes complicated.

Further, since the input shaft on the supply and conveyance device side and the harvesting input shaft are linked by the annular rotating belt to cause the input shaft on the supply and conveyance device side and the harvesting input shaft to be interlocked, there is no need to precisely manage the positional relationship between the supply and conveyance device fixed to the body-side fixing member and the harvesting input shaft, and, for example, in the case where the harvesting section is switched to the open state, the supply and conveyance device can be easily separated from the harvesting input shaft by detaching the annular rotating belt.

In the present invention, it is preferable that the cylindrical case includes: an end portion side housing portion covering an outer peripheral side of the other end portion in the transverse width direction of the machine body of the cut input shaft, a housing main body portion covering an outer peripheral side of the cut input shaft closer to an inner side in the transverse width direction of the machine body than the other end portion, and a plurality of coupling bodies arranged between the end portion side housing portion and the housing main body portion in a dispersed manner in a circumferential direction of the cut input shaft and coupling the end portion side housing portion and the housing main body portion, wherein the opening is formed by arranging adjacent coupling bodies of the plurality of coupling bodies so as to be spaced apart from each other.

According to this configuration, the other end of the input shaft is covered by the end-side housing portion, and the portion closer to the inner side in the transverse width direction of the machine body than the other end is covered by the housing main body portion, and the end-side housing portion and the housing main body portion are connected by a plurality of connecting bodies arranged in a dispersed manner in the circumferential direction. By disposing adjacent coupling bodies apart from each other, an opening for passing the endless rotating belt is formed between the coupling bodies.

With this configuration, the transmission rotating body on the upstream side around which the endless rotating belt is wound is located at a position corresponding to the coupling body of the input shaft, and both axial side portions of the position form a state in which the outer peripheral portion of the input shaft is covered with the end portion side housing portion and the housing main body portion.

Instead of this, for example, it is conceivable to use an integral cylindrical case as the cylindrical case, the end portion of the cylindrical case at the other side in the transverse width direction of the housing from which the input shaft is cut is entirely covered, and to form an opening by cutting at a portion of the cylindrical case where the endless rotating belt is wound. However, such a structure has a disadvantage that the processing for precisely forming a large opening is complicated while securing the supporting strength.

In contrast, according to the present configuration, it is possible to obtain a configuration in which the other end portion in the transverse width direction of the housing from which the input shaft is cut is covered, the opening in which the annular rotating band is wound is provided, and the end portion side housing portion and the housing main body portion are coupled by a plurality of coupling bodies, which is easy and simple to manufacture.

In the present invention, it is preferable that the other end portion of the input shaft is rotatably supported by the end portion side housing portion via a support member, and the input transmission rotating body and the end portion side housing portion are integrally and detachably supported by the housing main body portion via the coupling body.

According to this configuration, the other end portion of the input shaft is rotatably supported by the end portion side housing portion via the support member, and therefore the input shaft is favorably supported by the other end portion of the input shaft without any trouble such as bending or deformation.

Further, since the input transmission rotating body and the end portion side housing portion are supported by the housing main body portion so as to be integrally detachable, for example, in a state where the cutout portion is switchable to the open posture about the vertical axis, the input transmission rotating body and the end portion side housing portion can be integrally detached.

As a result, the end portion side housing portion is removed, so that the transmission endless rotation can be removed from the supply and conveyance device, and the input transmission rotating body is removed, so that when the housing main body is swung while the cutting portion is swung to the open posture, interference between the input transmission rotating body and other components can be prevented.

Another structure of the combine harvester provided by the invention is characterized by comprising: the harvesting and conveying device comprises a harvesting part for harvesting and conveying the planted vertical grain rod to the rear, a driving engine and a harvesting speed change device for changing the speed of power from the engine and transmitting the power to the harvesting part, wherein the engine is positioned at one side part close to the transverse width direction of the machine body, and the harvesting speed change device is positioned at the other side part close to the transverse width direction of the machine body.

According to the above feature, the power from the driving engine is transmitted to the cutting portion while being shifted by the cutting transmission. The cutting part is driven by the output of the cutting speed changing device, so that the driving speed of the cutting part relative to the machine body running speed can be changed and adjusted. As a result, appropriate harvesting work can be performed regardless of the type of crop or the difference in the lodging state of the crop.

The engine is located near one side of the transverse width direction of the machine body, and the cutting speed changing device is located near the other side of the transverse width direction of the machine body. That is, the cutting transmission device is disposed at a position on the end portion on one side in the lateral width direction of the machine body opposite to the position where the engine is disposed, and is disposed not only at a position on the end portion side on one side in the lateral width direction of the machine body opposite to the position where the engine is disposed, but also at a position on the end portion side on one side in the lateral width direction of the machine body opposite to the position where the engine is disposed, such as not only the cutting transmission device, but also a transmission mechanism that transmits power of the engine to the cutting transmission device, and a transmission mechanism that transmits power after the cutting transmission device is shifted to the cutting portion.

As a result, when performing maintenance work on the transmission mechanism for transmitting power to the cutting transmission device and the like from the lateral outside of the body, the transmission mechanism for transmitting power to the cutting transmission device is located close to the operator, so that the operator can easily approach his hand to the position to be maintained, and can perform the operation without trouble.

Therefore, the combine harvester which is easy to maintain can be provided.

In the present invention, it is preferable that a tank for storing the working oil is disposed in a state of being aligned with the engine in a lateral width direction of the body, and the cutting transmission is located on an opposite side of the engine with respect to the tank.

According to this configuration, the engine is located on one side in the lateral width direction of the machine body with respect to the oil tank, and the cutting transmission is located on the other side in the lateral width direction of the machine body with respect to the oil tank.

With such an arrangement, the oil tank can be arranged close to the engine, and the hydraulic oil can be supplied to the hydraulic oil pump driven by the engine in a satisfactory manner. Further, the cutting transmission can be disposed close to the oil tank, and when the cutting transmission is configured to be of a hydraulic operation type, the supply and discharge of the hydraulic oil to and from the cutting transmission can be performed satisfactorily.

In the present invention, it is preferable that the cutting transmission is located above the oil tank.

Since the fuel tank is heavy, the fuel tank is generally disposed at a low position on the machine body, and the cutting portion is supported by the machine body so as to be vertically swingable.

In this configuration, since the cutting transmission is located above the oil tank, the distance between the power input unit for inputting power to the cutting unit located at a higher position is shorter than that of the lower position where the cutting transmission is located below the oil tank, and power can be efficiently transmitted.

In the present invention, it is preferable that the cutting transmission is located above a rear portion of the fuel tank.

According to this configuration, since the cutting transmission is located above the rear portion of the fuel tank, it is not necessary to specially arrange a member above the front portion of the fuel tank. Further, since the cutting portion is disposed on the front side of the body, and a support frame for supporting the cutting portion and a transmission shaft for transmitting power to the cutting portion are required, such a support frame and a transmission shaft can be disposed by using an upper portion in front of the fuel tank.

Therefore, the upper portion of the fuel tank can be effectively utilized to arrange various devices such as the cutting transmission and other supporting frames for the cutting portion, the transmission shaft, and the like.

In the present invention, it is preferable that the cutting transmission is supported by a side wall of the fuel tank.

According to this configuration, since the cutting transmission is supported by the side wall of the oil tank, the cutting transmission can be supported by a simple structure without complicating the structure as in the case where a special support body is provided on the body side, for example.

In the present invention, it is preferable that a transverse transmission shaft that transmits power of the engine to the harvesting transmission extends in a transverse width direction of the machine body and is located on a rear side of the machine body of the oil tank.

According to this configuration, the lateral propeller shaft for transmitting the power of the engine to the cutting transmission is appropriately disposed by utilizing the space formed on the rear side of the body of the large oil tank.

In the present invention, it is preferable that a threshing device for performing a threshing process on the grain stalks cut by the cutting section and a grain cleaning process on the threshed objects is provided, and the transverse transmission shaft is located on the front side of the machine body with respect to the threshing device.

According to this structure, the transverse transmission shaft is located on the rear side of the machine body of the oil tank and on the front side of the machine body compared to the threshing device. That is, the transverse transmission shaft extending in the transverse width direction of the machine body can be arranged reasonably by utilizing the space formed between the oil tank and the threshing device.

In the present invention, it is preferable that the cutting transmission is located on a front side of the machine body with respect to the lateral transfer shaft.

According to this configuration, since the power from the transverse transmission shaft is transmitted to the harvesting transmission device, which is positioned further forward than the transverse transmission shaft in the machine body, the transverse transmission shaft and the harvesting transmission device can be easily coupled via the transmission mechanism so as to be interlocked, for example, without interfering with the threshing device of a large-sized device.

In the present invention, it is preferable that a threshing device for performing a threshing process on the grain stalks cut by the cutting unit and a grain cleaning process on the threshed objects is disposed, and a branch transmission mechanism for branching and transmitting the power of the engine transmitted via the transverse transmission shaft to the cutting transmission device and the threshing device is disposed on the other side in the transverse width direction of the machine body with respect to the oil tank.

According to this configuration, since the branch transmission mechanism that branches the power transmitted from the engine via the lateral transmission shaft to the harvest speed change device and the threshing device is disposed on the other side in the lateral width direction of the machine body with respect to the oil tank, maintenance work for the branch transmission mechanism can be easily performed, as in the case where the transmission mechanism that transmits the power to the harvest speed change device is disposed.

In the present invention, it is preferable that an input transmission mechanism for transmitting power from a branch power output shaft of the branch transmission mechanism to a speed change input shaft of the harvesting transmission device is disposed, and the branch power output shaft is located on a lower side of the harvesting transmission device.

According to this configuration, power is transmitted from the power take-off shaft located on the lower side to the cutting transmission located on the upper side via the input transmission mechanism, and power is transmitted from the cutting transmission to the cutting unit located on the front side of the machine body. For example, if the input transmission mechanism is made to transmit power in the front-rear direction at the same height as the cutting transmission, the transmission mechanism for transmitting power to the cutting portion is disadvantageously large in the front-rear direction. In contrast, if the above configuration is adopted, there is an advantage that the transmission mechanism in the front-rear direction of the machine body can be easily simplified.

In the present invention, it is preferable that the input shaft of the cutting unit is located on the front side of the machine body with respect to the output shaft of the cutting transmission.

According to this configuration, since the input shaft is positioned on the front side of the body with respect to the output shaft, the input shaft can be disposed as close as possible to the driven portion of the cutting portion positioned on the front portion of the body, and the transmission path can be easily shortened, thereby simplifying the transmission structure.

In the present invention, it is preferable that the output transmission mechanism for transmitting power from the transmission output shaft to the harvesting input shaft is disposed on the same side of the harvesting transmission device in the lateral width direction of the machine body with respect to the oil tank.

According to this configuration, the output transmission mechanism transmits power from the cutting transmission device positioned on the other side in the transverse width direction of the machine body to the other side portion in the transverse width direction of the machine body of the cutting input shaft, and the transmission distance of the output transmission mechanism is shortened, whereby power can be transmitted efficiently. Further, since the output transmission mechanism is located on the same side as the cutting transmission device, that is, on the other side in the lateral width direction of the machine body with respect to the oil tank, there is an advantage that maintenance work of the output transmission mechanism is easy.

In the present invention, it is preferable that the output transmission mechanism is located on an outer side surface of the other side of the oil tank in the lateral width direction of the machine body.

According to this configuration, since the output transmission mechanism is disposed on the outer side surface of the oil tank facing the other side outward in the lateral width direction of the machine body, maintenance work for the output transmission mechanism is easily performed.

In the present invention, it is preferable that the output transmission mechanism is configured to transmit power by a transmission belt, to be switchable between a transmission state in which a tension is applied to the transmission belt and a non-transmission state in which the application of the tension is released, and to be provided with a manual operation element for switching the output transmission mechanism from the transmission state to the non-transmission state.

According to this configuration, the manual operation tool can be operated to switch between a transmission state in which tension is applied to the transmission belt and a non-transmission state in which the application of tension is released. For example, when maintenance work is performed on the output transmission mechanism, the tension of the transmission belt is released by the manual operation tool, so that the transmission belt can be easily detached and the maintenance work can be easily performed.

In the present invention, it is preferable that the manual operation element is disposed on an outer side surface of the other side in the lateral width direction of the body of the oil tank.

According to this configuration, since the manual operation element is disposed on the outer side surface of the oil tank facing the other side outward in the lateral width direction of the machine body, the operator can easily operate the manual operation element from the other side outward in the lateral width direction of the machine body. As a result, the maintenance work of the output transmission mechanism is facilitated. Further, the manual operation element can be supported by the outer side surface of the oil tank, and thus, a dedicated support member is not required to be arranged, and the manual operation element can be supported by a simple structure.

In the present invention, it is preferable that the cutting section is supported by a support frame body so as to be swingable about a vertical axis between an operating position for cutting operation and a maintenance position which is moved laterally outward in front of the machine body and opens a front portion of the machine body, and the cutting transmission is located behind the machine body of the support frame body.

According to this configuration, when the cutting operation or the traveling is performed, the cutting unit is located at the working position for the cutting operation. When maintenance work is performed on the inside of the cutting portion and the inside of the machine body, the cutting portion is swung around the vertical axis to be switched to a maintenance position. Thus, the cutting portion moves toward the front of the machine body and laterally outward, and the front of the machine body is opened, so that the operation is easy.

The cutting transmission is located behind the machine body of the support frame body, i.e., on the rear side of the vertical axis position. As a result, even if the cutting portion is swung about the vertical axis to be switched to the maintenance position, the cutting portion is less likely to interfere with the cutting transmission.

Thus, even if the cutting transmission is located near the cutting input shaft, when the cutting portion is swung around the vertical axis to switch the posture, the interference between the cutting transmission and the cutting portion can be avoided, and the posture of the cutting portion can be switched smoothly.

Drawings

Fig. 1 is an overall side view of a combine harvester.

Fig. 2 is a side view of the front of the combine.

Fig. 3(a) and (b) are plan views of the front part of the combine harvester showing the cutting part position switching state.

Fig. 4 is a front view of the fuel tank.

Fig. 5 is a side view of the fuel tank.

FIG. 6 is a driveline diagram.

Fig. 7 is a side view showing the transmission mechanism for traveling.

Fig. 8 is a cross-sectional plan view of the tensioning mechanism for running.

Fig. 9 is a perspective view of the oil tank in a state where the flow-down guide plate is attached.

Fig. 10 is an exploded perspective view showing a support structure of the fuel tank.

Fig. 11 is a partially cut-away front view showing a support structure in which the cutting section is supported by the machine body.

Fig. 12 is an exploded perspective view showing a support structure of the supply and conveyance transmission case.

Fig. 13 is a side view showing a power transmission structure for transmitting power to the harvesting section.

Fig. 14 is a plan view showing a power transmission structure for transmitting power to the cutting portion.

Fig. 15 is a vertical front view showing a power transmission structure for transmitting power to the cutting portion.

Fig. 16 is a cross-sectional plan view showing a power transmission structure for transmitting power to the cutting portion.

Fig. 17 is a partially cut-away side view showing a support structure of the supply and conveyance device.

Fig. 18 is a cross-sectional plan view of the supply and conveyance device.

Fig. 19 is a side view showing a posture switching state of the supply conveyance transmission box.

Fig. 20 is a side view of the cover in the attached state.

Fig. 21 is a side view showing a support structure of a supply and conveyance device according to another embodiment.

Fig. 22 is an exploded perspective view showing a support structure of a supply and conveyance device according to another embodiment.

Fig. 23 is a cross-sectional plan view showing a support structure for cutting the left end portion of the input shaft according to another embodiment.

Fig. 24 is an exploded perspective view showing a support structure for cutting the left end of the input shaft according to another embodiment.

Description of the reference numerals

3a cutting part; 4, a threshing device; 7, an engine; 10 threshing and feeding chain; 17 supply and transport device; (ii) a 21 a frame; 23 an oil tank; 29 supporting the frame body; 38 a body-side rotation holding member; 63 a transverse drive shaft; a 64-branch transmission mechanism; 65 cutting the speed change device; 83 branch power take-off shaft; a 90 variable speed input shaft; 91 a transmission mechanism for input; 102 a variable speed output shaft; 103 cutting the input shaft; 104 a transmission mechanism for output; 106 a transmission rotating body for input; 107 a conveyor belt; 115 a manual operating member; 121,122 guide the wheel body; 123 an endless rotating belt; 125 supply conveying transmission mechanism; 126 supply conveying transmission box; 132 end side support cylinder part; 134 a support body for conveyance; 147 relay transmission mechanism; 148 a bushing; 166 a fixing connecting member; 174 on the upstream side; 175 downstream side of the driving rotator; 176 an endless rotating belt; 177 a cylindrical housing; 178 an end-side housing portion; 179 a connection; 184 a support member; k is opened; the Y longitudinal axis.

Detailed Description

[ first embodiment ]

A first embodiment of the combine harvester of the present invention is described below with reference to the accompanying drawings.

[ integral Structure ]

As shown in fig. 1 and 3, a combine harvester has a harvesting unit 3 connected to a front part of a travel machine body 2 having a pair of right and left crawler travel devices 1 and capable of being raised and lowered about a transverse axis X, and a threshing device 4 and a grain tank 5 arranged in a transverse width direction of the travel machine body 2 at a rear part of the travel machine body. Further, a right front portion of the travel machine body 2 has a cab driving unit 6 covered with a cab, and a driving engine 7 is disposed below the cab driving unit 6.

In the present embodiment, when the left and right sides in the transverse width direction of the body are defined, the right side or the left side is defined with reference to the forward traveling direction. Therefore, the right side of the body equipped with the engine 7 corresponds to one side in the lateral width direction of the body, and the left side of the body corresponds to the other side in the lateral width direction of the body.

As shown in fig. 2, the harvesting unit 3 includes six raising devices 8, a pusher-shaped harvesting device 9, a carrying device 11, and the like, wherein the raising devices 8 raise the lodged standing grain stems, the harvesting device 9 cuts the roots of the lodged standing grain stems, and the carrying device 11 gradually changes the posture of the vertical grain stems with the roots cut into a horizontal posture and carries the stems to the starting end of the threshing supply chain 10 of the threshing device 4 located on the rear side of the machine body.

The cutting section 3 is supported as a whole by a front-rear direction cylindrical frame 12 extending in the front-rear direction and is supported by the traveling machine body 2 so as to be movable up and down about the lateral axis X via the front-rear direction cylindrical frame 12. The cutting unit 3 is supported by the traveling machine body 2 so as to be swingable about the vertical axis Y, and is swingable between a working position for cutting work shown in fig. 3(a) and a maintenance position in which the cutting unit is moved laterally outward in front of the machine body to open the front of the machine body shown in fig. 3 (b).

As shown in fig. 1, the threshing apparatus 4 is configured to: the stem root of the grain stalk cut in the cutting section 3 is threshed by the threshing cylinder 13 while being held and conveyed by the threshing supply chain 10, and the grain box 5 is discharged with the grain obtained by performing grain cleaning processing on the threshed processing object by the cleaning section 14 disposed below the threshing cylinder 13. Although not described in detail, a grain discharging device 16 is provided to discharge the grains stored in the grain tank 5 to the outside.

The part for receiving the reaping grain rods conveyed from the reaping part 3 to the threshing supply chain 10 is provided with a supply conveying device 17 for supplying and conveying the reaping grain rods from the conveying terminal end part of the reaping part 3 to the threshing supply chain 10.

[ supporting structure of cutting part ]

The supporting structure of the cutting section 3 will be explained.

As shown in fig. 3 and 11, a lateral cylindrical frame 18 in a lateral posture is integrally connected and fixed to a rear end portion of the front-rear facing cylindrical frame 12, and the lateral cylindrical frame 18 is supported rotatably about a lateral axis X by a pair of left and right support and holding portions 19,20 provided on the body side. Therefore, the cutting section 3 is supported by the traveling machine body 2 so as to be movable up and down about the lateral axis X.

As shown in fig. 1 and 2, a hydraulic cylinder 22 is pivotally connected between a middle portion of the front-rear direction cylindrical frame 12 and a front end portion of the frame 21, and the cutting unit 3 can be operated to swing up and down about the horizontal axis X by operating the hydraulic cylinder 22 in an extending and contracting manner. Although not described in detail, the connection portion between the hydraulic cylinder 22 and the front-rear facing tubular frame 12 can be separated.

As shown in fig. 2 and 3, an oil tank 23 for storing working oil is provided below the lateral tubular frame 18. The oil tank 23 is configured as a rigid structure.

As shown in fig. 4, 5 and 10, the oil tank 23 includes left and right vertical surface portions 23a,23b formed of a thick plate material, an upper surface portion 23c formed of a thick plate material and having a mountain shape in a side view, a front surface portion 23d, a rear surface portion 23e and a bottom surface portion 23f formed by bending a continuous plate material, and the surface portions 23a,23b,23c,23d,23e,23f are integrally connected to form a storage space for the working oil therein. Of the left and right vertical surfaces 23a,23b, the left vertical surface 23a is extended so as to protrude rearward and upward from the upper surface 23c and the rear surface 23e, the right vertical surface 23b is provided so as to be lower than the upper surface 23c, and the upper surface 23c is extended so as to protrude rightward and outward from the right vertical surface 23 b.

A rotation support portion 29 is provided outside the left-side vertical surface portion 23a of the oil tank 23 and on the front side of the machine body so as to be integrally and continuously provided with the vertical surface portion 23a, and the rotation support portion 29 allows the support cutting portion 3 to freely swing around the vertical axis Y.

The pivot support portion 29 is formed in a substantially box shape with only the rear side of the body open by the left vertical surface portion 23a, that is, formed as follows: one end of the plate 30 bent into an L shape in plan view is integrally fixed to the left outer surface of the left side vertical surface portion 23a to form a space approximately コ in plan view, and the top plate 31 forming the top surface of the space is fixed, thereby forming an approximately box-shaped storage space that is open only on the rear side of the machine body. The bottom surface of the storage space is formed by the frame 21.

A plurality of portions of the oil tank 23 are fixed to the frame 21 by bolt fastening. That is, as shown in fig. 4, the plate material is bent at substantially right angles at the lower end portions of the vertical surface portions 23a and 23b on both the left and right sides to form horizontal surface portions 23a1 and 23b1, and the horizontal surface portions 23a1 and 23b1 are fastened and fixed to the frame 21 by the bolts 33 in the vertical direction.

Specifically, the horizontal surface portions 23a1 and 23b1 on the left and right sides are fastened and fixed by the bolts 33 in the vertical direction at six positions in total, three positions being separated in the front-rear direction.

That is, as shown in fig. 10, 11, and 13, the frame 21 has a bottom frame body 21B forming a bottom surface of the housing space at a portion corresponding to a lower portion of the pivot support portion 29, and the front surface portion 29a and the left surface portion 29B of the pivot support portion 29 are fastened and fixed to a fixing bracket 34 having an L shape in plan view, which is fixed and erected on the bottom frame body 21B, by bolts 35 in the front-rear direction and the left-right direction.

Further, a cylindrical support shaft 36 for supporting the cutting section 3 by the rotation support section 29 so as to be rotatable about the vertical axis Y is housed in the rotation support section 29 in a state supported so as to be rotatable about the vertical axis Y. The top plate 31 of the rotation support portion 29 has a rotation cylinder portion 37 for rotatably supporting the support shaft 36, and a rotation base portion 38 is integrally connected and fixed to an upper portion of the support shaft 36 through which the rotation cylinder portion 37 is inserted.

As shown in fig. 11 and 12, an upper portion side of the support shaft 36 having the pivot base portion 38 at an upper portion thereof is rotatably supported by the pivot cylinder portion 37 about the vertical axis Y, and a small-diameter stepped portion 39 of a lower end portion of the support shaft 36 is rotatably supported by an insertion hole 40 formed in the bottom frame body 21B. Thus, when the cutting portion 3 is switched to the maintenance position, the rotation support portion 29 can support the load of the cutting portion 3. Therefore, the pivot support portion 29 functions as a support frame body on the machine body side.

Further, a left support holder 19 for supporting the lateral tubular frame 18 is attached to an upper portion of the rotating base portion 38.

As shown in fig. 12, the left supporting and holding portion 19 is composed of a fixed side receiving member 41 fixed to the rotating base portion 38 and a rotating side pressing member 42, and the rotating side pressing member 42 is supported to be swingably opened and closed between a closed state in which it is vertically overlapped with the fixed side abutting member 41 and an open state in which it is opened outward. The lateral cylindrical frame 18 is interposed between the fixed-side receiving member 41 and the rotating-side pressing member 42, and the rotating-side pressing member 42 is switched to the closed state and fixed by the bolt 43, so that the lateral cylindrical frame 18 is held while being sandwiched in a state where the lateral cylindrical frame 18 is rotatable around the lateral axis X integrally with the support shaft 36.

As shown in fig. 11, the right support and holding portion 20 for rotatably supporting and holding the lateral tubular frame 18 is mounted and supported on the upper portion of the oil tank 23 via a bracket 44. The right supporting and holding portion 20 is constituted by a fixed side receiving member 41 and a rotating side pressing member 42, similarly to the left supporting and holding portion 19, and holds the lateral cylindrical frame 18 by sandwiching the lateral cylindrical frame 18 in a state of being rotatable around the lateral axis X.

Since the cutting portion 3 is supported by such a support structure, the connection between the hydraulic cylinder 22 and the front-rear-facing cylindrical frame 12 can be released from the cutting work position shown in fig. 3(a), the turning-side pressing member 42 of the right-side support holding portion 20 of the pair of left and right support holding portions 19,20 can be switched to the open state, and the cutting portion 3 can be swung about the longitudinal axis Y of the support shaft 36 to be switched to the maintenance position shown in fig. 3.

At this time, the power transmission belt 107 described later needs to be detached. Although not shown, in order to maintain the vertical position of the entire cutting section 3 at a predetermined position in place of the hydraulic cylinder 22, a position maintaining section for supporting the rotating base section 38 or the lateral tubular frame 18 needs to be separately arranged.

The oil tank 23 is located below the portion receiving the harvested straw conveyed from the harvesting unit 3 to the threshing device 4, and since the oil tank 23 has the top surface portion 23c having a mountain shape in a side view as described above, there is a possibility that the dropped straw chips are accumulated on the top of the oil tank 23.

Therefore, as shown in fig. 9 and 11, a flow-down guide plate 45 for forming a flow-down path in a one-way flow shape is attached to an upper portion of the oil tank 23, and the fallen straw chips are guided to the ground from an open space on the front side of the oil tank 23.

Further, as shown in fig. 4 and 5, since the plurality of hydraulic oil inlets and outlets 46 of the oil tank 23 are formed at the lower side portions of the front surface portion 23d and the left side vertical surface portion 23a, the attachment and detachment of the oil supply hose are easier as compared with the case where the hydraulic oil inlets and outlets are provided at the bottom surface of the oil tank 23, for example. Incidentally, a supply oil passage and a return oil passage are connected to the plurality of hydraulic oil inlets and outlets 46, and the supply oil passage and the return oil passage supply or return oil to a hydraulic pump (not shown) for supplying hydraulic oil to the hydraulic cylinder 22 and the like, a hydrostatic continuously variable transmission for travel driving, a hydrostatic continuously variable transmission for take-off shifting, and the like, which will be described later.

[ Transmission structure for traveling ]

Next, a driving power transmission structure for transmitting the power of the engine 7 to the crawler belt driving device 1 will be described.

As shown in fig. 7, the power of the engine 7 provided below the boarding portion 6 is transmitted from the output shaft 7a of the engine 7 to the transmission case 49 via the belt transmission mechanism 47. Although not shown, a hydrostatic continuously variable transmission (HST) for driving and a rotation transmission mechanism are disposed in the transmission case 49. The traveling power is transmitted from the transmission case 49 to the right and left crawler traveling devices 1.

A running tension mechanism 51 that applies tension to the transmission belt 50 is disposed on the belt transmission structure 47. As shown in fig. 7 and 8, in the running tensioner mechanism 51, a bracket 52 having a U-shape in plan view is fixed by welding to an upper portion of the lateral frame body 21C of the frame 21, and a telescopic operation mechanism 54 which is swingable back and forth about the axis P is supported by the bracket 52 via a pivot pin 53. As shown in fig. 8, a mounting plate 55 coupled and fixed to one end of the pivot pin 53 is coupled to the bracket 52 by a bolt 56, thereby preventing the pivot pin 53 from falling off.

The telescopic operating mechanism 54 includes a cylindrical support member 57 pivotally connected to the bracket 52 by a pivot pin 53, a compression spring 58 housed in the support member 57, and a slide shaft 59 slidably supported by the support member 57 in a state of being inserted through an upper end portion of the support member 57.

In fig. 14, a tension roller 61 is supported by an upper front end portion of the slide shaft 59 via an L-shaped coupling member 60, and the slide shaft 59 is biased downward by a compression spring 58 attached to the support member 57, so that the tension roller 61 can apply tension to the transmission belt 50.

A gap is formed between the pivot pin 53 and the support member 57 in the radial direction, and the support member 57 is supported so as to be capable of swinging operation in a direction (the front-back direction of the paper surface in fig. 7, that is, the width direction of the belt) orthogonal to the axial direction of the pivot pin 53. As a result, the tension roller 61 can be detached from the belt 50 with the position thereof shifted in the width direction of the belt.

In this way, the running tension mechanism 51 is supported by the frame 21 in a state in which the back-and-forth swinging movement and the lateral movement for detachment are possible with the tension roller 61 applying the tension by a simple structure using one pivot pin 53.

[ Transmission structure for cutting ]

Next, a cutting transmission structure for transmitting the power of the engine 7 to the cutting section 3 will be described.

As shown in fig. 6, the power of the engine 7 is transmitted from the output shaft 7a to the branch transmission mechanism 64 via the belt transmission mechanism 62 and the transverse transmission shaft 63, and is branched and transmitted to the threshing device 4 and a cutting drive hydrostatic continuously variable transmission (HST) (simply referred to as a cutting HST)65 as a cutting transmission via the transmission mechanism 64. The belt transmission mechanism 62 is configured such that three belts 62 are wound over the engine-side transmission wheel 62A and the driven-side pulley 62B.

As shown in fig. 10 and 13 to 15, the cutting HST65 is attached and fixed to a portion extending upward and rearward of the left side vertical surface portion 23a serving as the side wall of the fuel tank 23 by fastening a plurality of portions with bolts 70 in a state of being positioned above the rear portion of the fuel tank 23.

As shown in fig. 10, four attachment portions 67 are integrally formed in a portion of the left-side vertical surface portion 23a extending rearward and upward so as to project leftward and outward, and a flange portion 69 formed on the housing 68 of the cutting HST is connected to a front end surface of the attachment portion 67 by a bolt 70, so that the cutting HST65 is attached and fixed. As a result, as shown in fig. 14, a gap corresponding to the protruding amount of the attachment portion 67 is formed between the cutting HST65 and the left vertical surface portion 23 a.

As shown in fig. 10, a support plate 73 is commonly fixed by bolts 74 to two rear-side mounting positions of the four mounting positions corresponding to the four mounting portions 67, and the support plate 73 supports a motor-driven shift operation mechanism 72 for operating the trunnion 71 of the cutting HST 65.

Therefore, the engine 7 is located at a position closer to one side (right side) in the transverse width direction of the machine body, the cutting HST65 is located at a position closer to the other side (left side) in the transverse width direction of the machine body, and the cutting HST65 is provided at a position opposite to the engine 7 with respect to the oil tank 23.

As shown in fig. 16, the transverse transmission shaft 63 is rotatably supported by a bearing 76 in a state in which the outer peripheral side thereof is covered by a relay transmission case 75 integrally formed with the transverse transmission shaft, and is provided in a state in which it extends from a position corresponding to the left end of the body of the oil tank 23 to a position further to the outside on the right side than the right end along the transverse width direction of the body, and is positioned on the rear side of the body of the oil tank 23 and on the front side of the body of the threshing device 4.

The power is branched from the middle portion of the transverse transmission shaft 63 to a transmission shaft 78 facing forward and backward via a bevel gear mechanism 77, and is transmitted to the treatment cylinder 12 of the threshing device 4 via a transmission pulley 79 and a transmission belt 80 disposed on the transmission shaft 78.

As shown in fig. 13, 14, and 16, the relay transmission case 75 also serves as a case of the branch transmission mechanism 64, and is integrally formed with a lateral cylindrical portion 75A surrounding the outer peripheral portion of the lateral transmission shaft 63, a branch transmission case portion 75B surrounding the periphery of the branch transmission mechanism 64, and an attachment flange portion 75C, and the attachment flange portion 75C is attached and fixed to the frame 21 by bolt fastening.

As shown in fig. 13 and 16, the branch transmission mechanism 64 is disposed on the left side of the machine body, which is the other side in the transverse width direction of the machine body, with respect to the oil tank 23, and the transverse transmission shaft 63, the relay transmission shaft 81, the threshing driving transmission shaft 82, and the harvesting driving transmission shaft 83 (an example of a branch power output shaft) are disposed in a state of being sequentially linked via transmission gears 84 to 87 and being aligned in the front-rear direction of the machine body.

As shown in fig. 6, a transmission pulley 88 is attached to the threshing driving transmission shaft 82. From this pulley 88, power is transmitted to the cleaning section 14 of the threshing device 4 via a drive belt 89. As shown in fig. 16, the threshing driving transmission shaft 82 projects outward to the left of the intermediate transmission case 75, and a transmission pulley 88 is attached to the outward projecting portion.

As shown in fig. 6, power is transmitted from the cutting drive transmission shaft 83 to the transmission input shaft 90 of the cutting HST65 via the input transmission mechanism 91. As shown in fig. 13, 15, and 16, the input transmission mechanism 91 includes: a drive-side pulley 92 fixed to the cutting drive transmission shaft 83 projecting outward on the left side of the relay transmission case 75, a driven-side pulley 93 disposed on the transmission input shaft 90, an input transmission belt 94 wound around the drive-side pulley 92 and the driven-side pulley 93, and an input tension mechanism 95 for applying tension to the input transmission belt 94. As shown in fig. 15, the input transmission mechanism 91 is provided in a gap formed between the cutting HST65 and the left side vertical surface portion 23 a.

As shown in fig. 13 and 15, the input tension mechanism 95 is disposed on the left outer side of the left side vertical surface portion 23a of the oil tank 23. The input tension mechanism 95 is configured such that a pair of swing arms 97,98 integrally swingably having an L shape in side view are supported on a fixed shaft 96 fixed to the longitudinal surface portion 23a, a tension roller body 99 is supported on one of the swing arms 97, a spring 101 is stretched across between a swing end portion of the other swing arm 98 and a bracket 100 fixed to the longitudinal surface portion 23a, and a tension is applied to the input transmission belt 94 by the biasing force of the spring 101.

As shown in fig. 13, the traverse transmission shaft 63 and the branch transmission mechanism 64 are disposed at a low position near the frame 21. On the other hand, the cutting HST65 is disposed at a position higher than this position. That is, the cutting drive transmission shaft 83 disposed in the branch transmission mechanism 64 is located below the cutting HST 65.

The power shifted by the harvesting HST65 is transmitted from the transmission output shaft 102 of the harvesting HST65 to the harvesting input shaft 103 disposed inside the lateral cylindrical frame 18, the harvesting input shaft 103 is disposed in a state of being positioned on the front side of the machine body with respect to the transmission output shaft 102 of the harvesting HST65, and the output transmission mechanism 104 for transmitting the power from the transmission output shaft 102 to the harvesting input shaft 103 is disposed on the same side of the harvesting HST65 in the transverse width direction of the machine body with respect to the oil tank 23, specifically, on the outer side surface on the left side of the oil tank 23.

As shown in fig. 6 and 13, the output transmission mechanism 104 includes: a drive-side power transmission pulley 105 fixed to the transmission output shaft 102, a driven-side power transmission pulley 106 disposed on the take-off input shaft 103, an output transmission belt 107 wound across the drive-side power transmission pulley 105 and the driven-side power transmission pulley 106, and an output tension mechanism 108 for applying tension to the output transmission belt 107.

As shown in fig. 13 and 15, the input tension mechanism 108 is disposed on the left outer side of the left side vertical surface portion 23a of the oil tank 23. The input tension mechanism 108 is configured such that a pair of swing arms 109 and 110 provided in an L shape in side view are integrally swingably supported on the input shaft 103, a tension wheel body 111 is supported on a swing end portion of one of the swing arms 109, a spring 114 is stretched across a space between a bracket 112 fixed to a swing end portion of the other swing arm 110 and a bracket 113 fixed to the pivot support portion 29, and a tension is applied to the input transmission belt 107 by an urging force of the spring 114.

A manual operation element 115 is provided in a state of being integrally fixed to the other swing arm 110 and extending in the longitudinal direction. The operator holds the manual operation member 115 and operates the manual operation member 115 in a direction opposite to the direction in which the spring 114 acts, thereby releasing the tension of the tension mechanism 111 against the urging force of the spring 114.

Therefore, if the manual operation element 115 is not operated, the output transmission mechanism 104 can be switched to a transmission state in which a tension is applied to the output transmission belt 107 by the biasing force of the spring 114, and if the manual operation element 115 is operated in a direction opposite to the biasing direction of the spring 114, the output transmission mechanism 104 can be switched to a non-transmission state in which the application of the tension is released.

The manual operation element 115 is provided on the left outer side portion of the oil tank 23, so that the manual operation element 115 can be easily operated from the outside on the left side of the body when the operator removes the output belt 107 in order to switch the cutting section 3 to the maintenance position.

As shown in fig. 15, since the output belt 107 is disposed at a position shifted to the outermost left side of the machine body, the work is easily performed when the output belt 107 is detached. However, in a normal operation state, as shown in fig. 20, the driven-side power pulley 106 and the output power belt 107 are covered with a cover 117 so that the driven-side power pulley 106 and the output power belt 107 are not exposed to the outside.

A guide bar 18 for transmitting the stem root side of the cut straw to the threshing supply chain 10 is attached to the outer surface of the cover 117. This is further explained as follows: when the cover 117 covering the driven pulley 106 and the output belt 107 is attached, the guide rod 119 for receiving and guiding disposed on the conveying device 11 may interfere with the cover 117 when the cutting unit 3 is raised, and therefore, the guide rod 119 for receiving and guiding on the conveying device 11 side needs to be made short. In order to enhance the function of guiding the portion where the harvested straw is transferred from the conveying device 11 to the threshing feed chain 10, the guide bar 118 is attached to the cover 117 as described above.

The power transmitted to the harvesting input shaft 103 is transmitted to the harvesting portion 3 via the front-rear transmission shaft 78 disposed inside the front-rear cylindrical frame 12 (see fig. 2 and 6).

[ supporting structure for supply conveyance device ]

Next, a support structure of the supply conveyance device 17 will be described.

As shown in fig. 17, in the supply and conveyance device 17, a conveyance chain 123 with a protrusion, which is constituted by an endless rotating chain as an endless rotating belt, is wound in tension across the drive sprocket 120 and the two guide wheels 121 and 122, and an outer peripheral side guide wheel 124 acting on an outer peripheral portion of the conveyance chain 123 is provided, so that the winding length by the drive sprocket 120 is increased. The supply conveyor 17 rotates the conveying chain 123 by the rotational power transmitted to the drive sprocket 120, and the harvested straw is stopped and conveyed to the threshing supply chain 10.

As shown in fig. 18, a supply conveyance transmission mechanism 125 is disposed at the left end portion of the harvesting input shaft 103 in a state of being positioned on the right side of the driven-side transmission pulley 106 of the output transmission mechanism, and the supply conveyance transmission mechanism 125 transmits power from the harvesting input shaft 103 to the supply conveyance device 17.

The supply conveyance transmission mechanism 125 is disposed on the right side (inward side in the transverse width direction of the machine body) of the supply conveyance device 17. The driven-side transmission pulley 106, to which power transmitted to the input shaft 103 is input, is disposed on the left side (the outer side in the lateral width direction of the machine body) of the supply and conveyance device 17. That is, the driven-side transmission pulley 106, the supply conveyance device 17, and the supply conveyance transmission mechanism 125 are arranged in the transverse width direction of the machine body such that the driven-side transmission pulley 106 is positioned on the outermost side in the transverse width direction of the machine body, the supply conveyance device 17 is positioned on the inner side in the transverse width direction of the machine body than the driven-side transmission pulley 106, and the supply conveyance transmission mechanism 125 is positioned on the inner side in the transverse width direction of the machine body than the supply conveyance device 17.

With this arrangement, since the driven pulley 106 is positioned at the outermost position in the transverse width direction of the machine body, the work of detaching the output belt 107 is easy, and the maintenance work is easy. As shown in fig. 11, the threshing supply chain 10 is located further to the outside in the transverse width direction of the machine body than the supply conveyor 17 in the front view, and is located further to the outside in the transverse width direction of the machine body than the driven-side transmission pulley 106 in a state of being partially overlapped with the driven-side transmission pulley 106.

As shown in fig. 18 and 19, the supply conveyance transmission mechanism 125 is configured as a gear-meshing transmission mechanism including a small-diameter gear 127 and a large-diameter gear 128 meshing with each other, the small-diameter gear 127 being integrally and rotatably fitted around the input shaft 103, and the large-diameter gear 129 being integrally and rotatably fitted around the driven shaft 128, in a state covered with the supply conveyance transmission case 126. The small-diameter gear 127 is fitted and mounted in a state where the position in the rotation axis direction is restricted by the bushes 148 on both the left and right sides.

The driven shaft 128 projects outward to the left from the supply conveyance transmission case 126, and the drive sprocket 120 is attached to this outward projecting portion. As shown in fig. 12 and 18, the guide wheel 124 on the outer peripheral side is rotatably supported about the horizontal axis by a support shaft 130 formed to protrude to the left outside from the rear upper portion of the supply/conveyance transmission case 126.

As shown in fig. 12, 17, and 19, the split boxes 126a and 126b on both the left and right sides of the supply conveyance transmission box 126 are flange-connected by bolt connection at a plurality of locations. Two of the plurality of bolt coupling portions of the supply conveyance transfer box 126 are coupled and fixed to the rotating base portion 38 by two brackets 131A and 131B with bolts 145. The two brackets 131A and 131B are commonly connected to each other by bolts 43 for connecting the upper and lower end sides of the fixed-side receiving member 41 of the left support holding portion 19 and the upper and lower end sides of the rotating-side pressing member 42, and are fixed to the rotating base portion 38.

As shown in fig. 12 and 18, an end-side support cylinder portion 132 that supports the outer peripheral portion of the left end of the input shaft 103 is integrally formed on the supply/conveyance transmission case 126. The end side support cylinder portion 132 is formed in a lateral cylindrical shape, and the left end portion of the input shaft 103 is rotatably supported therein via a bearing 133.

The supply conveyance transmission case 126 is fixed to the rotating base portion 38, and as shown in fig. 18, the left end portion of the lateral tubular frame 18 is fitted and connected to the end portion side support cylinder portion 132 so as to be relatively rotatable, and the lateral tubular frame 18 can be rotated about the lateral axis X in accordance with the lifting operation of the cutting portion 3.

As shown in fig. 17, the supply and conveyance device 17 includes a transmission support body 134 that supports the two guide wheel bodies 121 and 122 around which the conveyance chain 123 is wound. Of the two guide wheels 121 and 122, the guide wheel 122 located on the rear side of the machine body functions as a tension wheel for applying tension to the conveying chain 123. That is, the transmission support 134 includes a support body 135 fixed to the supply/conveyance transmission case 126, and a wheel body support member 137, and the wheel body support member 137 is slidable in the front-rear direction with respect to the support body 135, and is urged by the urging coil spring 36 to move toward the front side (tension applying side).

The wheel body supporting member 137 integrally includes a supporting portion 138 that supports the guide wheel body and has a U shape in a plan view, and a cylindrical spring housing portion 139 that houses the coil spring 136. Further, a support rod 140 is provided, and the support rod 140 is inserted into the spring housing 139 and has a support member at the distal end thereof for supporting the other end side of the coil spring 136. The support rod 140 is screwed to a plate member 141 disposed on the support body 135, and the adjustment position can be changed in the front-rear direction. In the drawing, 142 is a lock nut for locking.

The cylindrical spring housing 139 is fitted into the cylindrical support portion 143 formed in the support body 135, whereby the wheel body support member 137 is slidably supported by the support body 135. Further, a guide rail 144 is disposed on the support body 135, and the guide rail 144 is positioned between the two guide wheel bodies 121 and 122 around which the conveying chain 123 is wound, and supports and guides the conveying chain 123.

As shown in fig. 17, two portions of the support body 135 are fastened and fixed to the supply conveyance transmission case 126 by bolts 147. Further, since the supply conveyance transmission box 126 is fixed to the rotating base 38 as the body side support as described above, the position of the supply conveyance device 17 can be held at the conveyance action position for locking and conveying the reaping bars.

When the connection and fixation of the supply conveyance transmission box 126 and the rotating base 38 is released, the supply conveyance device 17 can rotate integrally with the supply conveyance transmission box 126 and change the posture to the retracted position.

That is, as shown in fig. 19, when two portions (connection portions Q) of the supply conveyance transfer box 126 are released from being connected to the bolts 145 of the rotating base 38, the supply conveyance transfer box 126 is rotatable relative to the lateral tubular frame 18 fitted and connected to the supply conveyance transfer box 126. As described above, since the lateral tubular frame 18 is supported by the pair of left and right support holders 19,20 and is fixed integrally with the tubular frame 12 facing in the front-rear direction, the supply conveyance device 17 and the supply conveyance transmission box 126 can be rotated upward integrally around the lateral axis X in a state where the rotation of the lateral tubular frame 18 is prevented.

Then, of the two bolt coupling portions Q of the supply/conveyance transfer box 126, the bolt coupling portion located on the lower side (the bracket 131B side) is formed with a screw hole 146 for bolt coupling again in the bracket 131 in a state where the supply/conveyance transfer box 126 is rotated upward by a predetermined angle (corresponding to the retracted position). The position of the supply and conveyance device 17 can be held at the retracted position by screwing the screw holes 146 to the connection portion of the supply and conveyance transfer box 126.

In this way, when the supply and conveyance device 17 is switched to the retracted position and the harvesting unit 3 is switched to the maintenance position by rotating about the vertical axis Y, the supply and conveyance device 17 can be prevented from interfering with an inlet plate (not shown) of the threshing device 4. Therefore, although the output belt 107 needs to be removed, the cutting section 3 can be rotated without removing the supply and conveyance device 17 and the driven-side pulley 106 disposed on the cutting input shaft 103.

[ second embodiment ]

A second embodiment of the combine harvester of the present invention is described below with reference to the accompanying drawings.

In the second embodiment, the supporting structure (including the transmission structure) of the supply and conveyance device 17 is different from that of the first embodiment, and the other structures are the same as those of the first embodiment, so that only the different structures will be described below, and the description of the same structures will be omitted.

Fig. 21 to 24 show a support structure of the supply and conveyance device 17 according to the second embodiment.

As shown in fig. 21, the supply and conveyance device 17 includes three guide wheel bodies 150,151,152 as a plurality of transmission rotating bodies, one drive sprocket 153, a conveyance chain 154 formed of an annular rotating sprocket with protrusions as a conveyance annular rotating belt wound over the three guide wheel bodies and the one drive sprocket, a supply and conveyance frame body 155 as a transmission support body rotatably supporting the guide wheel bodies 150,151,152 and the one drive sprocket 153, and the like.

As shown in fig. 21 and 22, the supply and conveyance frame body 155 includes a pair of support brackets 156, a coupling body 157, a support plate 158, a guide rail 159, and the like, wherein the pair of support brackets 156 support the two guide wheels 150 and 151 located on the upper side, respectively, the coupling body 157 is integrally coupled and fixed to each support bracket 156 and is bent from a tubular material into a U-shape in a plan view, the support plate 158 is attached across both side portions of the coupling body 157, and the guide rail 159 is supported by the support plate 158. The guide rail 159 supports and guides the conveying chain 154 between the two guide wheels 150 and 151.

A cylindrical support shaft sleeve portion 160 is fixedly coupled to an intermediate portion of the coupling body 157 in the longitudinal direction. The support bushing portion 160 rotatably supports a rotary shaft 162 as an input shaft of the supply conveyance device 17 to which a sprocket 161 is attached via a bearing not shown. A tension arm 163 is disposed on the rotating shaft 162, and the tension arm 613 is supported to be swingable like a scale.

One guide sheave body 152 functioning as a tension sheave body is supported at one end portion of the tension arm 163, and a tension spring 165 is stretched between the other end portion of the tension arm 163 and a spring receiving member 164 fixed to one support bracket 156. The tension arm 163 is urged by the biasing force of the tension spring 166 to swing in a direction in which the guide wheel body 152 applies a tension to the conveying chain 154.

A fixing coupling member 166 is disposed, and the supply/conveyance frame body 155 is coupled and supported by the tank 23, which is an example of a fixing member on the body side, by the fixing coupling member 166. As shown in fig. 22, the fixing connecting member 166 is formed by bending a tubular member into a substantially L-shape when viewed in the front-rear direction of the body, and one end side in the longitudinal direction thereof is integrally connected and fixed to a middle portion of the connecting body 157 of the supply and conveyance frame body 155 and the support shaft sleeve portion 160.

The other end side in the longitudinal direction of the fixing coupling member 166 is coupled and fixed to the upper surface of the tank 23 at a plurality of positions in a state where the coupling directions are different.

Further explanation is as follows: as shown in fig. 21 and 22, the other end side of the fixing coupling member 166 is disposed so as to extend in the transverse width direction of the machine body, and a first bracket 167 and a second bracket 168 are coupled and fixed to different portions of the other end side of the fixing coupling member 166, respectively, wherein the first bracket 167 and the second bracket 168 are formed by bending a plate material into an L shape when viewed from the front-rear direction of the machine body.

On the other hand, a first mounting body 169 to which the first bracket 167 is connected and a second mounting body 170 to which the second bracket 168 is connected are fixedly disposed at a left end portion of the top portion of the upper surface of the tank 23. When the fixing coupling member 166 is attached to the oil tank 23, the bolt 171 is horizontally coupled in a surface-contact state on the longitudinal surface of the first bracket 167, and the bolt 171 is vertically coupled and fixed to the first attachment member 169 in a surface-contact state on the horizontal surface of the first bracket 167. Further, the horizontal surface portion of the second bracket 168 is fixed to the second mounting body 170 by fastening the bolt 172 in the vertical direction in a surface-contact state. Thus, the fixing coupling member 166 is coupled and fixed to the upper surface of the tank 23 at a plurality of positions in a state where the coupling directions are different.

Therefore, in this embodiment, the supply and conveyance device 17 is attached to the machine body in a fixed position.

The supply conveyance transmission mechanism 173 that transmits power to the supply conveyance device 17 includes: a sprocket 174 (an example of an upstream-side transmission rotating body) disposed on the input shaft 103, a sprocket 175 (an example of a downstream-side transmission rotating body) disposed on the input shaft of the feeding and conveying device 17, and a drive chain 176 as an endless rotating belt wound around the sprocket 174 and the sprocket 175.

The drive chain 176 is wound across the sprockets 174,175 through an opening K formed in a cylindrical case 177 covering the outer periphery of the input shaft 103.

That is, the cylindrical case 177 covering the outer peripheral side of the input shaft 103 includes: an end portion side housing portion 178, a lateral cylindrical frame 18, and a plurality of coupling bodies 179, wherein the end portion side housing portion 178 covers an outer peripheral side of an end portion on the left side (an example of the other side in the machine body lateral width direction) of the cut input shaft 103, the lateral cylindrical frame 18 serves as a housing main body portion covering an outer peripheral side on the inner side in the machine body lateral width direction than the left end portion of the cut input shaft 103, and the plurality of coupling bodies 179 are disposed between the end portion side housing portion 178 and the lateral cylindrical frame 18 so as to be dispersed in the circumferential direction of the cut input shaft 103 and couple the end portion side housing portion 178 and the lateral cylindrical frame 18.

Further explanation is as follows: as shown in fig. 23 and 24, a connecting member 180 having three connecting bodies 179 integrally formed is attached to the left end of the lateral cylindrical frame 18. The coupling member 180 is formed in a substantially triangular shape in side view, and has a mounting plate-like portion 182, the mounting plate-like portion 182 having an insertion hole 181 at the center through which the input shaft 103 is inserted, and three coupling bodies 179 integrally formed in a state of protruding outward to the left from the vicinity of the triangular top of the mounting plate-like portion 182. Further, the intermediate position of each coupling member 179 is fixedly coupled to the lateral cylindrical frame 18 by a bolt 183.

Further, an end-side housing section 178 is bolted to the left side of the connecting member 180. The end-side housing section 178 is formed in a substantially triangular shape in side view, and has a through hole 185 formed in the center thereof for mounting a bearing 184, wherein the bearing 184 rotatably supports the input shaft 103 as a support member. The end portion side housing portion 178 is fastened and fixed to the left end portion of each coupling member 179 by using a bolt 186 near the apex of the triangle.

As shown in fig. 23, the input shaft 103 is cut so as to have a portion protruding outward on the left side from the left end of the lateral cylindrical frame 18, and an upstream sprocket 174 of the conveyance transmission mechanism 173 and the driven pulley 106 are spline-fitted to each other. The sprocket 174 is fitted and attached in a state where the position in the rotation axial center direction is restricted by the left and right bushes 187. In a state where the driven-side transmission pulley 106 is fitted and mounted, the fixed sprocket 174 and the driven-side pulley 106 are fixed to each other by a bolt 189 connected to the shaft end of the input shaft 103 via a lining plate 188.

The sprocket 174 is disposed so as to correspond to the installation position of the coupling member 179 of the cylindrical case 177, and the drive chain 176 is stretched across both the sprockets 174 and 175 while passing between the plurality of coupling members 179.

That is, the opening K through which the drive chain 176 passes is formed by disposing adjacent coupling bodies 179 to be spaced apart from each other.

The driven-side transmission pulley 106 and the end-side housing portion 178 are integrally supported in a detachable manner by the lateral tubular frame 18.

That is, the bolt 189 attached to the shaft end of the cut input shaft 103 and the three bolts 186 connecting the end portion side housing portion 178 and the three connecting bodies 179 are detached, respectively, and the driven side transmission pulley 106 integrally including the bearing 184 and the end portion side housing portion 178 can be pulled out from the cut input shaft 103. Further, the mounting can be performed by the reverse operation.

Thus, by detaching the driven-side transmission pulley 106, the cutting section 3 can be moved in a good state without interference between the members when the cutting section 3 is moved to the maintenance position by rotating about the vertical axis Y.

[ other embodiments ]

Other embodiments are described below.

(1) In the first embodiment, the following configuration is shown: the supply/conveyance transmission mechanism 125 is disposed on the right side (the inside in the transverse width direction of the machine body) of the supply/conveyance device 17, and the driven-side transmission pulley 106 (the input transmission rotating body) that inputs power to the harvesting input shaft 103 is disposed on the left side (the outside in the transverse width direction of the machine body) of the supply/conveyance device 17. However, the present invention is not limited to this configuration, and the order of the supply and conveyance device 17, the supply and conveyance transmission mechanism 125, and the driven-side transmission pulley 106 in the transverse width direction of the machine body may be changed as appropriate.

(2) In the first embodiment, the supply conveyance transfer box 126 includes the end-side bearing cylinder portion 132, but the supply conveyance transfer box 126 and the end-side bearing cylinder portion 132 may be configured as separate members.

(3) In the second embodiment, the supply and conveyance device 17 is coupled and fixed to the oil tank 23, but instead of this configuration, the supply and conveyance device 17 may be coupled and fixed to a dedicated support frame body.

(4) In the second embodiment, the supply conveyance transmission mechanism 125 has the drive chain 176 as an endless rotating belt, but instead of this configuration, a belt may be provided.

(5) In the second embodiment, the opening K for passing the endless rotating belt is formed in the cylindrical case 177 by disposing the adjacent coupling bodies 179 among the plurality of coupling bodies 179 at a distance from each other, but the opening K may be formed by cutting out a part of the cylindrical case in the circumferential direction.

Alternatively, the plurality of coupling members 179 has a configuration having three coupling members 179, but the plurality of coupling members 179 may have two, four or more coupling members.

(6) In the above embodiments, the harvesting unit is supported so as to be swingable about the vertical axis between the working position and the open position (maintenance position), but a combine harvester not having such a structure may be used.

(7) In the above embodiments, the supply and conveyance device 17 has been described as having two guide wheels 121 and 122 as a plurality of guide wheels, but may have a configuration having three or more guide wheels as a plurality of guide wheels.

(8) In the above embodiments, the combine harvester harvesting six ridges at a time is shown, but the combine harvester may be a combine harvester having a smaller number of ridges than six ridges or a combine harvester having a larger number of ridges than six ridges.

(9) In the above embodiments, the cutting HST65 is supported by the left side vertical surface portion 23a of the oil tank 23, but the present invention is not limited to this configuration, and a configuration in which the cutting HST65 is supported by a dedicated support frame extending from the frame 21 may be employed.

(10) In the above embodiments, the configuration in which the cutting HST65 is disposed in a state of being positioned above the rear portion of the tank 23 is shown, but the present invention is not limited to this configuration, and a configuration in which the cutting HST65 is disposed in a state of being positioned above the front portion side of the tank 23, or a configuration in which the cutting HST65 is disposed in a state of being positioned above the front-rear intermediate portion of the tank 23 may be adopted.

Further, instead of the configuration in which the fuel tank 23 is disposed above the fuel tank 23 as described above, the fuel tank may be disposed on the front outer side, the rear outer side, or the lateral outer side of the fuel tank 23. The configuration in which the oil tank 23 and the engine 7 are arranged in the transverse width direction of the machine body as described above is not limited, and the oil tank 23 may be disposed at a position separated from the engine 7 or the cutout portion 3.

(11) In the above embodiments, the branch transmission mechanism 64 that branches the power of the engine 7 and transmits the power to the harvesting HST65 and the threshing device 4 is provided on the left side of the oil tank 23, but the branch transmission mechanism 64 may be provided on the right side of the oil tank 23 or on the upper side of the oil tank 23, that is, not limited to the left side of the oil tank 23.

Instead of the branch transmission mechanism 64, a transmission system for transmitting the power of the engine 7 to the harvesting HST65 and a transmission system for transmitting the power of the engine 7 to the threshing device 4 may be provided separately.

Industrial applicability

The invention can be applied to a combine harvester which can cut, fetch and thresh the standing grain rods while the machine body runs.

Claims (21)

1. A combine harvester, comprising: a harvesting part (3) for harvesting and conveying the planted vertical valley rod to the rear, a driving motor (7), a harvesting speed change device (65) for changing the speed of the power from the motor (7) and transmitting the power to the harvesting part (3),

the engine (7) is positioned at a position close to one side of the transverse width direction of the machine body, the cutting speed change device (65) is positioned at a position close to the other side of the transverse width direction of the machine body,

an oil tank (23) for storing working oil is arranged in a state of being arranged in the transverse width direction of the machine body with the engine (7), the cutting transmission device (65) is positioned on the opposite side of the engine (7) relative to the oil tank (23),

a transverse transmission shaft (63) for transmitting the power of the engine (7) to the cutting speed change device (65) extends along the transverse width direction of the machine body,

a threshing device (4) is arranged, the threshing device (4) threshes the grain stems cut by the cutting part (3) and cleans the grains of threshed objects,

a branch transmission mechanism (64) for branching and transmitting the power of the engine (7) transmitted via the transverse transmission shaft (63) to the harvesting transmission device (65) and the threshing device (4) is arranged at the other side of the machine body in the transverse width direction relative to the oil tank (23),

the transverse transmission shaft (63) is positioned on the rear side of the oil tank (23).

2. A combine harvester according to claim 1, characterised in that the harvesting gear change (65) is located above the oil tank (23).

3. A combine harvester according to claim 2, characterised in that the harvesting gear change (65) is located above the rear of the tank (23).

4. A combine harvester according to any one of claims 1 to 3, characterised in that the harvesting gear (65) is supported on a side wall of the tank (23).

5. A combine harvester according to claim 1,

the transverse transmission shaft (63) is positioned on the front side of the machine body compared with the threshing device (4).

6. A combine harvester according to claim 5, characterised in that the harvesting gear change (65) is located on the front side of the machine body compared to the transverse drive shaft (63).

7. A combine harvester according to claim 1, characterized in that an input transmission mechanism (91) is provided, the input transmission mechanism (91) transmitting power from a branch power output shaft (83) of the branch transmission mechanism (64) to a speed change input shaft (90) of the harvesting transmission device (65), the branch power output shaft (83) being located on a lower side of the harvesting transmission device (65).

8. A combine harvester according to claim 7, characterised in that the harvesting input shaft (103) of the harvesting portion (3) is located at the front side of the machine body with respect to the variable speed output shaft (102) of the harvesting gear change (65).

9. A combine harvester according to claim 8, wherein an output transmission mechanism (104) for transmitting power from the variable speed output shaft (102) to the harvesting input shaft (103) is disposed on the same side of the harvesting transmission device (65) in the body transverse width direction with respect to the oil tank (23).

10. A combine harvester according to claim 9, wherein the output transmission mechanism (104) is disposed on the outer side surface of the other side of the oil tank (23) in the transverse width direction of the machine body.

11. A combine harvester according to claim 10, wherein the output transmission mechanism (104) is configured to transmit power by a transmission belt (107) and to be switchable between a transmission state in which tension is applied to the transmission belt (107) and a non-transmission state in which the application of the tension is released,

a manual operation element (115) for switching the output transmission mechanism (104) from the transmission state to the non-transmission state is arranged.

12. A combine harvester according to claim 11, wherein the manual operation member (115) is disposed on the outer side surface of the other side of the oil tank (23) in the transverse width direction of the machine body.

13. A combine harvester according to claim 12, characterized in that the harvesting section (3) is supported on a support frame body (29) in a manner swingable about a longitudinal axis (Y) between an active position for harvesting and a maintenance position moved laterally outward in front of the machine body to open the front of the machine body,

the cutting speed change device (65) is positioned behind the machine body of the supporting frame body (29).

14. A combine harvester according to claim 1, characterised in that the harvesting gear change (65) is located on the front side of the machine body compared to the transverse drive shaft (63).

15. A combine harvester according to claim 14, characterized in that an input transmission mechanism (91) is provided, the input transmission mechanism (91) transmitting power from a branch power output shaft (83) of the branch transmission mechanism (64) to a speed change input shaft (90) of the harvesting transmission device (65), the branch power output shaft (83) being located on a lower side of the harvesting transmission device (65).

16. A combine harvester according to claim 1, characterised in that the harvesting input shaft (103) of the harvesting portion (3) is located at the front side of the machine body with respect to the variable speed output shaft (102) of the harvesting gear change (65).

17. A combine harvester according to claim 16, characterised in that an output transmission mechanism (104) for transmitting power from the variable speed output shaft (102) to the harvesting input shaft (103) is disposed on the same side of the harvesting transmission (65) in the body transverse width direction with respect to the oil tank (23).

18. A combine harvester according to claim 17, characterised in that the output transmission mechanism (104) is disposed on the outer side surface of the other side of the body of the oil tank (23) in the transverse width direction.

19. A combine harvester according to claim 17 or 18, wherein the output transmission mechanism (104) is configured to transmit power by a transmission belt (107) and to be switchable between a transmission state in which tension is applied to the transmission belt (107) and a non-transmission state in which the application of the tension is released,

a manual operation element (115) for switching the output transmission mechanism (104) from the transmission state to the non-transmission state is arranged.

20. A combine harvester according to claim 19, characterised in that the manual operating member (115) is disposed on the outer side surface of the other side of the body of the oil tank (23) in the transverse width direction.

21. A combine harvester according to any one of claims 1 to 3, characterised in that the harvesting section (3) is supported on a support frame body (29) so as to be pivotable about a longitudinal axis (Y) between an active position for harvesting and a maintenance position in which the machine body is moved laterally outwardly in front of the machine body so that the front of the machine body is open,

the cutting speed change device (65) is positioned behind the machine body of the supporting frame body (29).

Images