JP2012213342A - Normal type combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a normal type combine harvester capable of avoiding the tendency that a center of gravity of a machine body rises by devising transmission mechanisms for transmitting a forward rotation driving force and a reverse rotation driving force to a reaping part.SOLUTION: The reaping forward rotation transmission mechanism 48 is composed of a transmission mechanism that transmits a driving force, divided from a threshing driving system that transmits an engine power to a thresher 5, to a power input part 47 of a feeder 4A, a reaping reverse rotation output part 74 that outputs the reverse driving force to the reaping part 4 is provided in a transmission case 7 in which the transmission mechanism for a driving system of a traveling device 10 is provided, and the reaping reverse rotation transmission mechanism A is composed of the reaping reverse rotation output part 74 and a transmission mechanism 24 from the reaping reverse rotation output 74 to the power input part 47 of the feeder 4A.

Description

  The present invention includes a cutting pretreatment device and a cutting unit having a feeder that conveys the harvested culm toward a threshing device, and transmits a normal driving force transmission mechanism to the cutting unit. And a cutting and reverse transmission mechanism for transmitting a reverse driving force, wherein the cutting unit is selectively switched between a normal driving state and a reverse driving state.

In this type of ordinary combine, a transmission mechanism configured to transmit a forward drive force and a reverse drive force to the reaper is configured as follows.
That is, the transmission mechanism for transmitting the normal driving force and the reverse driving force to the reaping part is configured to be branched from the power transmission system from the engine to the threshing device. Specifically, a transmission case for driving the barrel is provided at the front of the threshing device, and the case input shaft to which engine power is transmitted and the reverse rotation power to the cutting unit are transmitted to the transmission case for driving the barrel. The cutting output shaft for output is supported, and the case input shaft and the cutting output shaft are interlocked and connected to each other in a forward rotation direction and a reverse rotation direction via a bevel gear mechanism in the transmission case. The forward drive force is transmitted from the case input shaft to the power input unit of the feeder of the cutting unit, and the reverse drive force is transmitted from the cutting output shaft to the power input unit of the feeder of the cutting unit ( For example, see Patent Document 1).

JP 2008-263866 A (paragraphs [0021], [0022], [0023], FIGS. 3 and 4)

  The conventional structure is useful in that the engine power can be used as the driving force of the threshing device and the driving force of the mowing unit, and the mowing unit can be driven in the normal rotation and reverse rotation states. However, it is necessary to arrange a transmission case that houses the case input shaft, the cutting output shaft, and the bevel gear mechanism at the front of the threshing device. This transmission case is quite large and heavy, and is located close to the axis of the handling cylinder at a relatively high position on the fuselage, which tends to increase the center of gravity of the fuselage. .

  An object of the present invention is to devise a transmission mechanism for transmitting a forward drive force and a reverse drive force to a cutting part, and to provide a normal combine that can avoid the tendency of the center of gravity of the machine body to increase. There is.

[Solution 1]
The technical means of the present invention taken in order to solve the above-mentioned problems includes a pre-treatment device for reaping and a reaping portion having a feeder that conveys the reaped culm toward the threshing device. A cutting forward rotation transmission mechanism for transmitting a forward driving force and a cutting reverse rotation transmission mechanism for transmitting a reverse driving force are provided, and the cutting portion is driven by selectively switching between the forward driving state and the reverse driving state. A normal type combine combiner configured as described above, wherein the mowing forward rotation transmission mechanism is configured by a transmission mechanism that transmits a driving force branched from a threshing drive system that transmits engine power to a threshing device to a power input unit of the feeder. In addition, a transmission case that outputs a reverse driving force to the cutting unit is provided in a transmission case that includes a speed change mechanism for the drive system of the traveling device, and the cutting reverse transmission mechanism is connected to the cutting reverse output. When, characterized by being constituted by a transmission mechanism from the reaper reverse rotation output unit to the power input portion of the feeder.

[Operation and effect of invention according to Solution 1]
According to the present invention relating to the above solution 1, among the transmission mechanisms that transmit the driving force to the power input portion of the feeder, the cutting reverse rotation output portion that outputs the reverse driving force to the cutting portion is shifted to the drive system of the traveling device. The transmission case is provided in a transmission case equipped with a mechanism, and a reverse driving force is transmitted from the transmission case to the power input section of the feeder.
In other words, the transmission case equipped with a speed change mechanism for the drive system of the traveling device is at a relatively low position on the fuselage, and the cutting reverse rotation output portion provided on this mission case is also at a relatively low position, and the center of gravity of the fuselage is compared. It is effective in maintaining a low level.
The forward-triggering transmission mechanism that transmits the normal driving force to the mowing unit uses the power of the threshing driving system, but the bevel gear for converting the transmission power into the normal rotation system and the reverse rotation system. There is no need to interpose a mechanism, etc., and it can be constructed using relatively lightweight parts such as a simple transmission belt and pulley, so that a transmission structure using a large and heavy transmission case is used. The tendency for the center of gravity of the aircraft to increase can be avoided.

[Solution 2]
Another technical means of the present invention taken in order to solve the above-mentioned problems is characterized in that the cutting reverse rotation output portion is constituted by a speed reduction mechanism using a planetary gear mechanism.

[Operation and effect of invention according to Solution 2]
According to the configuration of the invention relating to the above solution 2, the planetary gear mechanism that is easy to miniaturize is used as compared with the case where the cutting reverse rotation output unit that performs reverse rotation and deceleration using multiple gear pairs with simple spur gears is used. Since the cutting reverse rotation output portion is configured by the conventional reduction mechanism, the space required for arranging the cutting reverse rotation output portion in the mission case is small, and there is an advantage that the mission case can be miniaturized.

[Solution 3]
The other technical means of the present invention taken in order to solve the above-mentioned problem is characterized in that the forward chopping transmission mechanism is branched from a threshing drive system at a position lower than the power input portion of the feeder. .

[Operation and effect of invention according to Solution 3]
According to the configuration of the invention relating to the solving means 3 described above, the normal cutting transmission mechanism branched from the threshing drive system that transmits engine power to the threshing device is branched at a position lower than the power input portion of the feeder. Therefore, compared with the case of branching from the input location to the handling barrel of the threshing device, the entire mowing forward rotation transmission mechanism can be easily arranged at a low location on the aircraft, and the tendency to increase the center of gravity of the aircraft is also suppressed in this respect. be able to.

[Solution 4]
Another technical means of the present invention taken in order to solve the above-mentioned problem is characterized in that the cutting reverse rotation output section is built in the rear upper part of the mission case.

[Operations and effects of invention according to Solution 4]
According to the configuration of the invention relating to the solution means 4 described above, the cutting reverse rotation output portion is disposed at a low position in the transmission case, but the cutting reverse rotation output portion is provided at the upper rear portion in the transmission case, thereby Since it can be arranged in a positional relationship as close as possible to the power input section, there is an advantage that the transmission mechanism from the cutting reverse rotation output section to the power input section of the feeder can be made compact.

General side view of ordinary combine General plan view of ordinary combine Diagram showing power transmission system Partially cutaway side view showing the structure of power transmission to the power input section of the feeder Partially cutaway front view showing power transmission structure in threshing drive system Sectional view showing support structure of wheel

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Overall configuration of ordinary combine]
FIG. 1 is an overall side view of an ordinary combine according to the present invention, and FIG. 2 is an overall plan view. As shown in these drawings, the ordinary combine according to the present invention comprises a pair of left and right crawler traveling devices 10 and 10 (corresponding to a traveling device) on the lower side of the body frame 1, and constitutes a self-propelled aircraft. A driving unit 2 equipped with an engine 20 and a driving unit 3 including a driving seat 30 on the upper side of the driving unit 2 are provided at the front of the body frame 1.
A threshing device 5 and a grain bag packing unit 6 are arranged in the lateral direction of the machine body on the rear side of the operation unit 3, and a reaping unit 4 having a feeder 4 </ b> A connected to the front portion of the threshing device 5 is provided. ing.

As shown in FIGS. 1 to 3, the cutting unit 4 includes the feeder 4 </ b> A in which a feeder conveyor 41 is housed inside a transfer case 40, and a preprocessing frame 42 connected to the front end of the feeder 4 </ b> A. The pre-processing device 4B is supported by.
Due to the up-and-down swing operation of the feeder 4A on the threshing device 5, the platform 42a located at the lower part of the pretreatment frame 42 is lowered to the ground, and the platform 42a is lifted from the ground. It is configured to be capable of moving up and down.

The pretreatment device 4B scrapes the pair of left and right dividers 43, 43 that are located at the front portion of the pretreatment frame 42 and that weed the planted culm to be cut, and the tip of the planted culm to be cut. The rotary reel 45 to be cut, the clipper-type harvesting device 44 that harvests the planted culm to be harvested, and the harvested culm is brought to the front side of the feeder 4A and conveyed to the entrance 40a of the conveying case 40 of the feeder 4A. And an auger 46 to be configured.
As shown in FIG. 3, the pretreatment device 4B includes a chain transmission mechanism and a belt transmission mechanism in which rotation of a feeder input shaft 47, which is a power input unit of the feeder 4A, is arranged on the left side of the feeder 4A and the pretreatment frame 42. , And a known pre-processing drive mechanism B composed of a shaft transmission mechanism and the like.
The feeder 4A includes a feeder conveyor 41 (see FIG. 3) inside, conveys the harvested cereals fed from the auger 46 side to the rear end portion of the feeder 4A, and the discharge port 40b located at the rear end portion. To the handling room 50 of the threshing device 5 is configured to supply the whole of the harvested cereal seeds to the tip.

The threshing device 5 includes a handling cylinder 52 and a sorting device (not shown) disposed inside a handling chamber 50 via a handling cylinder shaft 51 having a longitudinal axis x facing the body. The handling cylinder 52 is rotationally driven by the driving force of the threshing drive system transmitted to the trunk shaft 51, the threshing processed material is sorted into threshing grains and waste straws, and the threshing grains are stored in the bag of the grain bag packing unit 6. It is comprised so that it may supply to the stuffing tank 6a.
Of the left and right lateral walls 50a, 50a of the handling chamber 50, the left lateral wall 50a is configured so that the upper side can be largely opened laterally outwardly about the vertical axis y1 on the rear side of the aircraft. The inside of the handling chamber 50 can be maintained and inspected with the left side wall 50a open. The lower part of the side wall 50a is configured to be detachable with respect to a fixed frame portion of the threshing device 5 by a bolt removal operation (not shown).
By opening the upper part of the lateral side wall 50a of the handling chamber 50 in this way, for example, a ceiling wall plate (not shown) on the upper side of the handling chamber 50 can be opened and closed around the horizontal axis in the horizontal direction. Compared to the configuration, the structure is complicated and the weight is increased by providing an air damper (not shown) as an auxiliary lifting means for assisting the lifting force for swinging and opening the heavy ceiling wall board. There is no risk of incurring.

  The grain bag filling unit 6 is configured so that the grain supplied into the bag filling tank 6a can be discharged from a grain discharge port (not shown) provided at the lower part of the bag filling tank 6a and packed in a bag. It is.

In the driving part 2 provided in the front part of the body frame 1, the output shaft 21 is in a horizontally placed posture along the left-right direction of the body with respect to the body frame 1 corresponding to the lower side of the driver seat 30 of the driving part 3. The engine 20 is installed.
The output shaft 21 of the engine 20 includes a transmission mechanism 22 of a travel drive system, which will be described later, for driving the left and right crawler travel devices 10, and a threshing drive system, which will be described later, for transmitting a driving force to the threshing device 5. The transmission mechanism 55 is linked.

[Operation section]
The driving unit 3 is provided with a control tower 31 provided with a control operation tool facing the front side of the airframe of the driver seat 30, and provided with operation tools for various work devices on the left lateral side of the drive seat 30. The control box 32 is erected.
The driver seat 30 is disposed on the upper side of a support base 3B formed on the rear side of the driver step 3A. The support base 3B is formed in a trapezoidal shape with a flat upper surface and front and rear wall portions, and the engine 20 of the prime mover 2 is located in a lower space of the support base 3B. The operation unit step 3A is also configured to serve as an engine bonnet that covers the engine 20 of the driving unit 2 from above.

In the driving section 3, a steering operation lever 31a is provided on the control tower 31, and a main transmission lever 33 for performing a shift operation including forward / reverse switching of the aircraft, A transmission lever 34 is provided.
Further, on the rear side of the control box 32, a forward-rotation cutting clutch lever 36 that performs an on / off operation of the forward-rotation cutting clutch 12 for driving the cutting portion 4 to rotate in the forward direction is positioned on the side closer to the driver seat 20. A threshing clutch lever 35 for turning on and off the threshing clutch 11 that is disposed and positioned farther in the left-right direction of the machine body than the driving seat 20 relative to the forward cutting reaping clutch lever 36 and intermittently drives the threshing device 5. It is provided.

The forward-rotation cutting clutch lever 36 and the threshing clutch lever 35 are both operated to the clutch disengagement position (the rear side of the machine body) as indicated by the solid line in FIG. 2, the threshing clutch lever 35 can be independently operated to the entering position (front side of the machine body) indicated by the phantom line in FIG. 2, but the forward rotation cutting clutch lever 36 is the entry position indicated by the imaginary line in FIG. 2. When the operation to the front side of the machine body is performed, the threshing clutch lever 35 in the cutting position is also put in and operated to the position, so that the threshing device 5 is driven together with the driving of the reaping part 4, so that The lever 36 and the threshing clutch lever 35 are linked.
On the contrary, in the state where both the forward rotation cutting clutch lever 36 and the threshing clutch lever 35 are in the clutch engagement position, the forward rotation cutting clutch lever 36 can be operated to the cutting position alone, but the threshing clutch lever 35 is disconnected. When operated to the position, the forward-rotation cutting clutch lever 36 is also operated to the cutting position together so that the driving of the cutting unit 4 together with the threshing device 5 is stopped.

That is, although the threshing device 5 can be turned on and off independently, the forward rotation drive of the reaping part 4 cannot be performed independently, and is linked so as to be accompanied by the synchronous drive of the threshing device 5.
Although a specific configuration for this linkage is not shown, for example, a locking member that contacts the cutting operation direction side of the threshing clutch lever 35 from the forward rotation cutting clutch lever 36 side, or the threshing clutch lever Appropriate means may be employed, such as a configuration in which a locking member that contacts from the 35 side to the entering operation direction side of the forward rotation cutting clutch lever 36 is connected.

Further, as shown in FIG. 2, the threshing device 5 is located farther from the driver seat 30 in the left-right direction of the machine body than the forward-cutting clutch lever 36 and the threshing clutch lever 35 disposed in the control box 32. A reverse-cutting clutch lever 37 is provided at the front side portion for performing on-off operation of the reverse-cutting clutch 13 for reversely driving and stopping the cutting part 4. The reversing cutting clutch lever 37 is pivotally supported so as to swing about the horizontal axis in the left-right direction of the machine body and to be moved up and down substantially.
As shown in FIGS. 2 and 4, the position of the reversing mowing clutch lever 37 in the longitudinal direction of the machine body is such that the forward-rotating mowing clutch lever 36 and the threshing clutch lever 35 are operated to the on position. In the state, the gripping portion 37a is located at the same position as the gripping portions 36a, 35a of the forward rotation cutting clutch lever 36 and the threshing clutch lever 35. At the cutting operation position of the forward-rotation cutting clutch lever 36 and the threshing clutch lever 35, the reverse-rotation cutting clutch lever 37 is located further forward than the gripping portions 36a, 35a of the forward-rotation cutting clutch lever 36 and the threshing clutch lever 35. A grip 37a is provided so as to be positioned.

As described above, the forward reaping clutch lever 36, the threshing clutch lever 35, and the reverse reaping clutch lever 37 are disposed, so that the forward reaping clutch lever 36 and the threshing clutch lever 35 are moved to the operation position. In this state, when the reverse rotation harvesting clutch lever 37 should not be operated, the forward rotation harvesting clutch lever 36 and the threshing clutch lever 35 are gripped to a position where the reverse rotation harvesting clutch lever 37 is difficult to operate. The parts 36a and 35a are present.
On the other hand, when the forward rotation cutting clutch lever 36 and the threshing clutch lever 35 are operated to the cutting operation position, the gripping portions 36a and 35a of the forward rotation cutting clutch lever 36 and the threshing clutch lever 35 are moved to the rear side of the machine body. Therefore, the reversing cutting clutch lever 37 can be easily turned on and off without being obstructed by the normal cutting mowing clutch lever 36 and the threshing clutch lever 35 at the cutting position.

  The reverse reaping clutch 13 and the forward reaping clutch 12 can both be operated in the disconnected state, but when either one is in the engaged state, a check linkage mechanism (not shown) is provided so that the other cannot be operated. Are linked to each other.

[Power transmission structure]
On the front end side of the fuselage frame 1 closer to the front side of the fuselage than the place where the engine 20 is provided, a transmission case 7 having a speed change mechanism for a drive system for driving the left and right crawler travel devices 10, 10 is arranged. It is set up.
A belt drive mechanism 22 of a traveling drive system that transmits a driving force from the engine 20 to the input shaft 70 of the mission case 7 is provided between the output shaft 21 of the engine 20 and the input shaft 70 of the mission case 7. It is.
In other words, the belt transmission mechanism 22 of the traveling drive system includes a vehicle body frame 1 between the traveling system output pulley 21 a provided on the output shaft 21 of the engine 20 and the input pulley 70 a provided on the input shaft 70 of the transmission case 7. The first transmission belt 22a and the second transmission belt 22b are stretched and interlocked via intermediate pulleys 23a and 23b provided on the intermediate shaft 23 pivotally supported by the fixed portion.

  The transmission case 7 includes a hydrostatic continuously variable transmission mechanism having a variable displacement axial plunger type hydraulic pump and an axial plunger type hydraulic motor driven by pressure oil from the hydraulic pump. 71 and a gear-type transmission mechanism 72 that transmits a driving force to the drive shafts 73 of the left and right crawler travel devices 10 and 10 are incorporated. Then, the engine power input from the input shaft 70 is continuously shifted by a hydrostatic continuously variable transmission mechanism 71, and the shifted power is shifted in multiple stages by a gear transmission mechanism 72. The drive shafts 73 and 73 of the crawler traveling devices 10 and 10 are configured to be driven and stopped separately for the left and right.

[Reverse drive system]
In the transmission case 7, a cutting reverse rotation output unit 74 for outputting reverse rotation power to the cutting unit 4 is provided separately from the gear-type transmission mechanism 72 that transmits power to the traveling drive system. .
As shown in FIG. 3, the cutting reverse rotation output unit 74 is constituted by a speed reduction mechanism using a planetary gear mechanism. The chopping reverse rotation output unit 74 is input with power split from the engine power input from the input shaft 70 from the transmission gear 70b on the transmission upper side that is not affected by the shift by the hydrostatic continuously variable transmission mechanism 71. The power greatly reduced by the planetary gear mechanism is output from the reverse output shaft 75.

  The reverse output shaft 75 is provided so as to protrude on the lateral side opposite to the lateral side on which the input shaft 70 of the mission case 7 projects. The power output from the reverse output shaft 75 is transmitted through the transmission mechanism 55 of the threshing drive system among the power input to the feeder input shaft 47 (corresponding to the power input unit) in the feeder 4A of the cutting unit 4. The driving force is transmitted via the reverse transmission mechanism 24 so that the power is transmitted to the feeder input shaft 47 in a state opposite to the rotational direction of the transmitted power.

The transmission mechanism 24 for reverse transmission is pivotally supported by a fixed portion of the machine body frame 1 between an output pulley 75 a provided on the output shaft 75 for reverse rotation and an input pulley 47 a for reverse rotation provided on the feeder input shaft 47. Further, the first reverse transmission belt 24a and the second reverse transmission belt 24b are stretched through intermediate pulleys 25a and 25b provided on the intermediate shaft 25. In this transmission mechanism 24, further reduction driving is performed between the output pulley 75a provided on the reverse output shaft 75 and the intermediate pulley 25a provided on the intermediate shaft 25, and between the intermediate pulley 25b and the reverse input pulley 47a. It is configured to be performed.
Then, by the transmission mechanism 24 for reverse transmission and the cutting reverse output part 74 provided in the transmission case 7, the cutting that transmits the driving force for reverse rotation to the feeder input shaft 47 of the feeder 4 </ b> A of the cutting part 4. A reverse transmission mechanism A is configured.

The transmission mechanism 24 for reverse transmission includes a second reverse transmission belt 24 b stretched between one intermediate pulley 25 b provided on the intermediate shaft 25 and a reverse input pulley 47 a provided on the feeder input shaft 47. A reverse-cutting clutch 13 is provided which acts on the motor.
As shown in FIGS. 3 and 4, the reverse rotation cutting clutch 13 includes a tension ring body 13 a that comes into contact with the second reverse transmission belt 24 b, and includes a reverse rotation cutting clutch lever 37 provided in the operating unit 3. By the turning-on / off operation, the reverse rotation cutting clutch lever 37 and the tension ring body 13a are linked by a linkage mechanism (not shown) so that the tension ring body 13a switches the second reverse transmission belt 24b between a tension state and a relaxation state. is there. The reversing cutting clutch lever 37 is disposed in the vicinity of the lateral outer side of the driving unit 3, and is on the side farther from the driving seat 30 than the threshing clutch lever 35 and the normal rotation cutting clutch lever 36. It is disposed at a position where the driver can easily reach and operate with the hand seated on the driver seat 30.
Accordingly, when the reverse rotation cutting clutch lever 37 is operated to be engaged, the tension wheel 13a tensions the second reverse transmission belt 24b, the reverse rotation cutting clutch 13 is engaged, and when the reverse rotation cutting clutch lever 37 is operated to operate the tension. A belt tension clutch is configured in which the ring body 13a relaxes the second reverse transmission belt 24b and the reverse cutting clutch 13 enters the clutch disengaged state.

The cutting reverse rotation output portion 74 built in the rear upper part of the mission case 7 is disposed at a lower position of the airframe with the upper part of the mission case 7 itself being located close to the upper surface of the airframe frame 1. For this reason, as shown in FIG. 4, it is provided at a position lower than the feeder input shaft 47 that is the power input unit of the feeder 4 </ b> A of the cutting unit 4.
In the reverse transmission mechanism 24, the reverse output shaft 75 and the intermediate shaft 25 are located lower than the feeder input shaft 47, and most of the first reverse transmission belt 24a and the second reverse transmission belt 24b are provided. It is disposed below the feeder input shaft 47 which is a power input unit.
Therefore, considering the center of gravity of the cutting reverse rotation output unit 74 and the reverse transmission transmission mechanism 24, the position is considerably lower than the feeder input shaft 47.

[Forward rotation drive system]
The output shaft 21 of the engine 20 is integrally provided with a threshing output pulley 21b for transmitting a driving force to a threshing drive system such as the threshing device 5.
The threshing output pulley 21b, the threshing input pulley 53a provided on the tang shaft 53 provided near the bottom of the threshing device 5, and the threshing transmission stretched across the threshing output pulley 21b and the threshing input pulley 53a. The belt 54 constitutes a transmission mechanism 55 of a threshing drive system in which engine power is transmitted to the threshing drive system.
The engine power transmitted to the tang shaft 53 is fixed to the tang shaft 53, in addition to the threshing input pulley 53a, a barrel output pulley 53b, a sorting output pulley 53c, and a normal cutting output pulley 53d. As a result, the barrel transmission mechanism 56 that transmits power to the barrel 52, the selection transmission mechanism 57 that transmits power to the various selection mechanisms in the threshing device 5, and the feeder input shaft 47 of the reaping unit 4 are powered. Is branched to each of the forward-cutting transmission mechanism 48 that transmits

As shown in FIG. 3, the handling cylinder transmission mechanism 56 that transmits power to the handling cylinder 52 is a handling provided on the Karatsu shaft 53 that protrudes to the right side outward from the right side wall 50 a of the threshing device 5. The cylinder output pulley 53b and a handling cylinder input pulley 51a for driving force transmission to the handling cylinder 52 are provided.
The barrel transmission mechanism 56 includes a relay shaft 56a supported on the side wall 50a on the upper side of the right side wall 50a of the threshing device 5, and a relay supported on the front wall 50b on the front wall 50b of the threshing device 5. And a shaft 56b. The relay shaft 56a supported on the lateral wall 50a includes a lateral wall relay pulley 56c along the lateral wall 50a, and the relay shaft 56b supported on the front wall 50b includes a front wall relay pulley 56d along the front wall 50b.
A first handling cylinder transmission belt 56e is stretched between the handling cylinder output pulley 53b and the lateral wall relay pulley 56c, and a second handling cylinder transmission belt 56f is stretched between the handling cylinder input pulley 51a and the front wall relay pulley 56d. It is.
And each relay shaft 56a, 56b was provided in the edge part so that the horizontal wall relay pulley 56c and the front wall relay pulley 56d might mutually interlock | cooperate on the inner side of the front wall 50b and the side wall 50a of the threshing apparatus 5. The bevel gears 56g and 56h are interlocked.

  A sorting transmission mechanism 57 for transmitting power to various sorting mechanisms in the threshing device 5 is transmitted from a sorting output pulley 53c provided on the Karatsu shaft 53 at a location protruding left laterally outward from the handling chamber 50 of the threshing device 5. The first screw conveyor 58A, the second screw conveyor 58B, the drive shaft 58C of the swing sorting device, and the like are driven via the belts 57a and 57b.

The forward cutting rotation transmission mechanism 48 is configured to extract power from the forward cutting output pulley 53d provided on the Karatsu shaft 53 at a further left outer position than the sorting output pulley 53c.
That is, on the feeder 4A side of the cutting unit 4, the forward input pulley 47b is provided on the left side opposite to the side where the reverse input pulley 47a of the feeder input shaft 47 is provided. The forward rotation driving pulley 53d is configured to transmit the forward driving force to the forward rotation input pulley 47b via the transmission belt 48a.

  As shown in FIG. 4, the branching point from the threshing drive system of the normal cutting transmission mechanism 48 is a normal cutting output pulley 53d provided on the tang shaft 53, and therefore, a feeder input shaft that is a power input unit of the feeder 4A. It is a location near the bottom of the threshing device 5 lower than 47, and this forward chopping transmission mechanism 48 is also disposed at a relatively low center of gravity.

The cutting forward rotation transmission mechanism 48 is provided with a forward cutting clutch 12 that acts on a transmission belt 48a stretched between a cutting forward rotation output pulley 53d and a forward rotation input pulley 47b.
As shown in FIGS. 3 and 4, the forward rotation cutting clutch 12 includes a tension ring body 12 a that comes into contact with the transmission belt 48 a, and allows the forward rotation cutting clutch lever 36 provided in the operating unit 3 to be turned on and off. The forward rotation cutting clutch lever 36 and the tension ring body 12a are linked by a linkage mechanism (not shown) so that the tension ring body 12a switches the transmission belt 48a between a tension state and a relaxation state.
Accordingly, when the forward rotation cutting clutch lever 36 is operated and operated, the tension ring body 12a tensions the transmission belt 48a and the normal rotation cutting clutch 12 enters the clutch state. When the normal rotation cutting clutch lever 36 is operated and operated, the tension wheel body 12a. The belt tension clutch is configured in which the transmission belt 48a is relaxed and the forward cutting clutch 12 is disengaged.

A threshing clutch 11 is provided which acts on a threshing transmission belt 54 stretched over a threshing output pulley 21b provided on the output shaft 21 of the engine 20 and a threshing input pulley 53a provided on the tongue shaft 53.
As shown in FIG. 3, the threshing clutch 11 includes a tension ring body 11 a that comes into contact with the threshing transmission belt 54, and this tension wheel is operated by turning on and off the threshing clutch lever 35 provided in the operating unit 3. The threshing clutch lever 35 and the tension ring body 11a are linked by a linkage mechanism (not shown) so that the body 11a switches the threshing transmission belt 54 between a tension state and a relaxed state.
Accordingly, when the threshing clutch lever 35 is turned on, the tension ring 11a tensions the threshing transmission belt 54 and the threshing clutch 11 enters the clutched state. When the threshing clutch lever 35 is turned off, the tension ring 11a is transmitted to the threshing. The belt 54 is relaxed so that the threshing clutch 11 is in a clutch disengaged state.

Since it is configured in this way, when the mowing unit 4 and the threshing device 5 are driven together to perform the mowing and threshing work, if the forward rotation mowing clutch lever 36 is operated to the entering position (the front side of the machine body), The threshing clutch lever 35 is also operated to the entering position (the front side of the machine body), and the reaping part 4 and the threshing device 5 are driven together to perform the reaping and threshing work.
At this time, if the reverse rotation cutting clutch lever 37 is operated to the engaged position, the normal rotation cutting clutch lever 37 is operated via the check linkage mechanism described above so that the forward rotation cutting clutch lever 36 cannot be operated to the engaged position. 36 and the reverse rotation cutting clutch lever 37 are linked.

From the state where the reaping part 4 and the threshing device 5 are both driven to perform the reaping and threshing operation, if the forward rotation reaping clutch lever 36 is operated to the cut position, the driving of the reaping part 4 is stopped, and the threshing apparatus Driving 5 continues. If the threshing clutch lever 35 is operated to the cut position, the driving of the threshing device 5 and the cutting unit 4 are both stopped.
If an attempt is made to operate the reverse cutting clutch lever 37 to the engaged position from the state in which the above mowing and threshing operation is being performed, as described above, unless the forward cutting mowing clutch lever 36 is first operated to the clutch disengaging position, The forward rotation cutting clutch lever 36 and the reverse rotation cutting clutch lever 37 are linked via the check linkage mechanism so that the cutting clutch lever 37 cannot be engaged and operated.

[Others]
As shown in FIG. 5, the crawler traveling devices 10, 10 have a claw engagement hole 14 b located in the middle of a pair of left and right core metal protrusions 14 a, 14 a of the crawler belt 14. It is formed at a position slightly outside of the position. As a result, the drive sprocket 15 with which the drive claw 15a engages with the claw engagement hole 14b and the guide wheel 16 that rolls between the core metal projections 14a are also slightly outside the center position of the crawler belt 14 in the left-right direction. Will be located.
The rollers 17 and 17 located on the inner peripheral side of the crawler belt 14 on the left and right outer sides of the core metal projection 14a have widths w1 and w2 in the left and right direction of the machine body positioned on the machine body center side of the core metal projection 14a. The width w2 of the rolling wheel 17 positioned on the side away from the center of the machine body is wider than the width w1 of the rolling wheel 17 in the left-right direction.
Therefore, of the wheels 17 and 17 positioned on both the left and right outer sides of the core metal protrusion 14a, the wheel 17 positioned on the side away from the center of the machine body has a width w2 in the left and right direction of the machine body and the center of the machine body of the core metal protrusion 14a. The distance L from the center of the fuselage to the outermost edge of the wheel 17 is larger than when it is formed to be as narrow as the lateral width w1 of the wheel 17 positioned on the side. As a result, the distances L and L from the center of the aircraft to the outermost edges of the left and right rolling wheels 17 are increased, the angle of the aircraft is increased, and the running stability of the aircraft is improved.

[Other Embodiment 1]
In the above-described embodiment, the planetary gear mechanism provided in the mission case 7 is used as the cutting reverse rotation output unit 74 for outputting the reverse rotation power to the cutting unit 4. A reverse rotation mechanism constituted by a gear pair or the like of a flat gear is used in the mission case 7, or the power output from the reverse output shaft 75 of the mission case 7 is reversed using a belt transmission mechanism outside the mission case 7. For example, an appropriate reverse rotation mechanism can be used. Other configurations may be the same as those in the above-described embodiment.

[Second embodiment]
In the above embodiment, the reverse transmission transmission mechanism 24 including the first reverse transmission belt 24 a and the second reverse transmission belt 24 b that are linked via the intermediate shaft 25, and the cutting reverse rotation output provided in the mission case 7. The cutting reverse rotation transmission mechanism A is constituted by the portion 74, but is not limited thereto, for example, the output pulley 75a provided on the reverse output shaft 75 of the cutting reverse output portion 74 and the reverse rotation provided on the feeder input shaft 47. The cutting reverse rotation transmission mechanism A may be configured by interlocking the input pulley 47a with a single belt. In this case, a tension clutch is provided on one belt stretched between the output pulley 75a provided on the reverse output shaft 75 and the reverse input pulley 47a provided on the feeder input shaft 47 so that the reverse power is turned on and off. You can do it.
Further, the reverse transmission transmission mechanism 24 is not limited to using a belt transmission mechanism, and may be configured to transmit power by a chain transmission or a gear interlocking mechanism. Other configurations may be the same as those in the above-described embodiment.

[3 of another embodiment]
In the above-described embodiment, the normal cutting transmission mechanism 48 is branched from the Karatsu shaft 53 at a position lower than the feeder input shaft 47 that is the power input unit of the feeder 4A. It may be branched from a position equivalent to or higher than the shaft 47. Other configurations may be the same as those in the above-described embodiment.

  The ordinary combine to which the present invention is applied is not limited to harvesting grains such as rice and wheat, but can also be applied to harvesting beans such as soybeans and florets such as rapeseed.

4 Mowing unit 4A Feeder 5 Threshing device 7 Mission case 10 Traveling device (crawler traveling device)
24 Transmission mechanism 47 for reverse transmission Power input (feeder input shaft)
48 Mowing reverse rotation transmission mechanism 74 Mowing reverse rotation output part A Mowing reverse rotation transmission mechanism

Claims (4)

A pre-cutting device for cutting and a cutting portion having a feeder for conveying the cut cereal toward the threshing device, and a normal cutting transmission mechanism and a reverse driving force for transmitting a normal driving force to the cutting unit. A normal combine that is configured to selectively switch between the forward drive state and the reverse drive state to drive the cutting unit,
The mowing forward rotation transmission mechanism is constituted by a transmission mechanism that transmits a driving force branched from a threshing drive system that transmits engine power to a threshing device to a power input unit of the feeder,
In the transmission case equipped with a speed change mechanism for the drive system of the traveling device, a cutting reversal output unit that outputs a reverse driving force to the cutting unit is provided,
2. A normal combine, wherein the cutting reverse rotation transmission mechanism is constituted by the cutting reverse rotation output portion and a transmission mechanism from the cutting reverse rotation output portion to the power input portion of the feeder.   2. The ordinary combine according to claim 1, wherein the cutting reverse rotation output portion is constituted by a speed reduction mechanism using a planetary gear mechanism.   3. The ordinary combine according to claim 1, wherein the forward cutting rotation transmission mechanism is branched from a threshing drive system at a position lower than a power input unit of the feeder.   The normal combine according to any one of claims 1 to 3, wherein the cutting reverse rotation output portion is built in a rear upper part of the mission case.

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