JP2002225746A - Operating device of crawler-traveling vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operating device of a crawler-traveling vehicle so that an operator can obtain a satisfactory operation feeling when the vehicle makes a turn by a turning means. SOLUTION: In the crawler-traveling vehicle which makes a turn by decelerating a traveling device 3 on an inner turning side according to the operation quantity of the turning means 5 provided on a driver's seat, direction fine- adjusting means 9 and 10 for finely adjusting the vehicle body advancing direction are provided separately from the turning means 5, power to the traveling device 3 on the inner turning side according to the operation of the direction fine-adjusting means 9 and 10 is cut to make a turn, and a position of cutting the power to the traveling device 3 on the inner turning side is not provided in an operation area of the turning means 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an operating device for a crawler traveling vehicle.

[0002]

2. Description of the Related Art A conventional crawler traveling vehicle, for example, an operating device for a combine, turns a body left and right by operating one turning operation lever left and right. The side clutch on the inside of the turn is disengaged, and for further operations, the traveling device on the inside of the turn is decelerated to make a gentle turn, or the brake is applied to make a pivot turn. Further, in addition to the above, a direction fine adjustment switch is provided at or around the tip of the turning operation lever, and the side clutch is disengaged by operating the direction fine adjustment switch left and right to change the traveling direction of the aircraft. Some of them perform fine adjustments and combine-specific alignment operations.

[0003]

When a combine is operated, for example, as in the above-described conventional apparatus, a plurality of turning methods are mixed in the operation area of the turning operation lever. Even in situations where it is difficult to reliably operate the area where the side clutch is disengaged and fine adjustment of the traveling direction is not so necessary when traveling on the road,
Since the operation lever always makes a gentle turn or a pivot turn after passing through the operation area for disengaging the side clutch, the operator may not be able to obtain the operation feeling desired by the operator.

[0004]

In order to achieve the above object, according to the present invention, there is provided a crawler traveling vehicle in which a traveling device inside a turn is decelerated and turned in accordance with an operation amount of a turning operation means provided in a driver's seat. In the above, provided a direction fine adjustment means for finely adjusting the aircraft traveling direction separately from the turning operation means,
In response to the operation of the direction fine adjustment means, the power to the traveling device inside the turning is cut off and the vehicle turns, while the operation area of the turning operation means is not provided with a position for cutting the power to the traveling device inside the turning. This is a first feature.

Also, in a crawler traveling vehicle provided with turning operation means and direction fine adjustment means in a driver's seat, a traveling device is transmitted through a planetary reduction mechanism, and a clutch and a brake are provided upstream of a ring gear transmission of the planetary reduction mechanism. A turning clutch is provided, and the clutch
By releasing the brake and cutting off the power to the ring gear of the planetary reduction mechanism inside the turn, the power to the traveling device inside the turn is cut and turning, and the turning is performed according to the operation of the turning operation means. By releasing the brake of the inner clutch / brake, connecting the clutch and connecting the turning clutch, the turning power is transmitted to the ring gear of the planetary reduction mechanism inside the turning, and the traveling device inside the turning is decelerated. The second feature is that the vehicle turns.

In a crawler traveling vehicle provided with turning operation means and direction fine adjustment means in a driver's seat, a traveling device is transmitted through a planetary reduction mechanism, and a clutch and a brake are provided upstream of a ring gear transmission of the planetary reduction mechanism. A turning HST is provided, and the clutch /
By releasing the brake and cutting off the power to the ring gear of the planetary reduction mechanism inside the turn, the power to the traveling device inside the turn is cut and turning, and the turning is performed according to the operation of the turning operation means. By releasing the brake of the inner clutch / brake and connecting the clutch, the power from the turning HST is transmitted to the ring gear of the planetary reduction mechanism inside the turning, and the traveling device inside the turning is decelerated to turn. This is the third feature.

In a crawler traveling vehicle provided with turning operation means and direction fine adjustment means in a driver's seat, a traveling device is transmitted via a side clutch, and a turning transmission clutch and a turning HST are provided upstream of the side clutch. By disengaging the side clutch in response to the operation of the direction fine adjustment means, the power to the traveling device inside the turn is disconnected and the vehicle turns, and the inside of the turn inside is turned in response to the operation of the turning operation means. A fourth feature is that the side clutch is disengaged, the turning transmission clutch on the inside of the turn is connected, and the power from the HST for turning is transmitted, so that the traveling device on the inside of the turn is decelerated and turned.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is an overall perspective view of a combine embodying the present invention. Like a normal combine, a front pre-processing unit 1, a driving operation unit provided behind the front processing unit 1, and a fir processing unit 2 provided further behind the same. It consists of a threshing / sorting unit provided on the side, a straw processing unit at the rear end, and left and right traveling devices 3 and 3 provided below these devices.

Next, FIG. 2 is a perspective view of a driving operation unit. The driving operation unit is provided with a driving seat 4 on which a driver sits. A multi-lever (swing operation means) 5 is provided for raising and lowering the pre-processing unit 1 when the vehicle is turned left and right and operated back and forth. A sub-transmission lever 7 for switching the traveling speed is provided.

FIG. 3 is an enlarged view around the multi-lever 5,
FIG. 4 is an operation diagram showing the operation range of the multi-lever 5. The multi-lever 5 is provided with a potentiometer 8 for detecting the tilt angle of the lever in the vicinity of the left-right rotation fulcrum. There are provided left and right fine adjustment switches (direction fine adjustment means) 9 and 10 for fine adjustment of the rotation angle and a rotation mode indicator 11 for displaying the rotation mode of the multi-lever 5.

FIG. 5 shows a lever guide of the auxiliary transmission lever 7. The auxiliary transmission lever 7 can be switched between a high speed (running) position 12, a medium speed (standard) position 13, and a low speed (down) position 14. By turning the sub-transmission lever 7 to the left side position 15 of the low-speed position 14, the turning mode changeover switch 16 is turned on and the turning mode of the combine is switched to the super turning mode.

FIG. 6 is a transmission system diagram of the transmission, in which 17 is an engine, 18 is a traveling HST for continuously changing the power of the engine 17, and 19 is a traveling HST 18.
This is an auxiliary transmission that reduces the power shifted by the transmission into three stages of high speed, medium speed and low speed. Reference numerals 20 and 21 denote left and right planetary reduction mechanisms, respectively, sun gears 22 and 23, planetary gears 24 and 25, ring gears 26 and 27, and carrier 2
The power reduced by the auxiliary transmission 19 is transmitted to the left and right sun gears 22 and 23 via the center gear 30.

On the upstream side of the transmission of the ring gears 26 and 27, a left and right clutch / brake 3 normally operating a brake and disengaging a clutch by a spring is provided.
The left and right clutches and brakes 3
The gears 33 and 34 that rotate integrally with the gears 1 and 32 and the ring gears 26 and 27 are always meshed.

On the upstream side of the transmission of the left and right clutch brakes 31 and 32, there are provided a gentle turning clutch 35, a sharp turning clutch 36 and a super pivot turning clutch 37 driven by the power reduced by the subtransmission 19. Normally, each clutch is disconnected by a spring, and the clutch is connected by a clutch actuator, which will be described later. The power is transmitted to any one of the ground swing clutch 37. Each of the revolving clutches 35, 36, and 37 has the same structure except for the gear ratio, and the revolving clutches 35, 36, and 37 have the same rotation direction with respect to the clutches of the left and right clutches and brakes 31 and 32. Also transmits power at different rotational speeds.

FIG. 7 is a block diagram of a microcomputer.
U43 is input from the potentiometer 8, the left and right fine adjustment switches 9 and 10, and the operation mode changeover switch 16, and the left and right clutch / brake actuators 38 and 3 are input.
9, a slow turning clutch actuator 40, a sharp turning clutch actuator 41, a super pivot turning clutch actuator 42, and a turning mode indicator 11. FIG. 8 is an operation pattern diagram of the multi-lever 5 in each turning mode.

FIGS. 9, 10, and 11 are right side views of the grain discharging device constituting the fir processing section of the combine. The grains processed by the threshing and sorting section are filled in the grain tank 50, When discharging to an outside truck or the like, the discharge motor 52 drives the horizontal spiral 53 in the grain tank 50 by moving the discharge auger 51 to a position where the discharge auger 51 is discharged and then operating the kernel discharge switch on the driver's seat. This is performed by driving the vertical spiral 54 in the discharge auger 51. Further, the operator can adjust the rotation of the discharge motor 52 from the driver's seat. Further, as the installation position of the discharge motor 52, the front end side of the horizontal spiral 53 as shown in FIG. 9, the rear end side of the horizontal spiral 53 as shown in FIG. 10, and the lower end side of the vertical spiral 54 as shown in FIG.

Next, an operation procedure of the combine operating device will be described. In the case of the normal turning mode, the microcomputer 43 normally operates the sub transmission lever 7 to any one of the high speed position 12, the medium speed position 13, and the low speed position 14 and cannot detect that the turning mode switch is turned on. It is determined that the mode is the turning mode. Therefore, by operating the main transmission lever 6 in the forward direction, the reduced power is transmitted via the center gear 30 to the left and right planetary reduction mechanisms 2.
It is transmitted to sun gears 22 and 23 of 0,21. At this time,
Since both the left and right clutch brakes 31 and 32 are in a state where the clutch is disengaged and the brakes are operated, the combine moves forward within the range of the speed selected by the sub-transmission lever 7.

In order to turn the combine rightward, the multi-lever 5 is moved to the position A in FIG. 4 beyond the play position on the right side, and when the position is detected by the potentiometer 8, the right clutch / brake actuator 38 is activated. As a result, the brake of the right clutch / brake 32 is released, the clutch is connected, and the gentle turning clutch 35 is connected by operating the gentle turning clutch actuator 40, so that the left traveling device 3 moves straight. While maintaining the rotation of the state, the right traveling device 3 transmits the power decelerated by the gentle turning clutch 35 to the ring gear 27 via the clutch of the right clutch / brake 32, so that the straight running power transmitted to the sun gear 23. Will be slowed down. At this time, the ratio of the rotation speeds of the traveling devices 3 and 3 on the outside and inside of the turn is 7: 3, and the vehicle turns gently to the right while minimizing roughening of the field.

In order to further turn the combine rightward, the multi-lever 5 is operated to the position B beyond the position A, and when the position is detected by the potentiometer 8, the sudden turning clutch actuator 41 is operated. Since the sharp turning clutch 36 is connected, the right traveling device 3 transmits the power decelerated by the sharp turning clutch 36 to the ring gear 27 via the clutch of the right clutch / brake 32, and transmits the power to the sun gear 23. The decelerated straight-line power is further decelerated. At this time, the ratio of the rotational speeds of the traveling devices 3 and 3 on the outside and inside of the turn is 9: 1, and the vehicle turns sharply rightward. However, since the traveling device 3 inside the turning is also rotating, the roughening of the field can be reduced as compared with the pivot turning in which the traveling device 3 inside the turning is braked and turned.

In the case of the super pivot mode, first, the sub pivot lever 7 is tilted leftward from the low speed position 14 to the super pivot position 1.
5 to detect that the turning mode changeover switch is turned on, the microcomputer 43 determines that the turning mode is the super turning mode, and turns on the turning mode indicator 11 provided on the multi-lever 5. Therefore, by operating the main transmission lever 6 in the forward direction, the reduced power is transmitted via the center gear 30 to the left and right planetary reduction mechanisms 2.
It is transmitted to sun gears 22 and 23 of 0,21. At this time,
Since both the left and right clutch brakes 31 and 32 are in a state where the clutch is disengaged and the brakes are operated, the combine moves forward within the low speed range selected by the sub-transmission lever 7.

In order to turn the combine in the right direction, the multi-lever 5 is moved to the position A beyond the play position on the right side, and when the position is detected by the potentiometer 8, the right lever is operated in the same manner as in the normal turning mode. The traveling device 3 is decelerated and makes a gentle right turn.

In order to further turn the combine rightward, the multi-lever 5 is moved to the position B beyond the position A, and when the position is detected by the potentiometer 8, the super pivot turning clutch actuator 42 is operated. As a result, the super pivot swing clutch 37 is connected, so that the right traveling device 3 inputs the power reduced by the super pivot swing clutch 37 to the ring gear 27 via the clutch of the right clutch / brake 32. , Sun gear 2
3 further decelerates the straight running power. At this time, the traveling device 3 on the inner side of the turn rotates in a direction opposite to the rotation of the traveling device 3 on the outer side of the turn and turns sharply.

In the case of the turning operation by the multi-lever 5, there is not provided a state in which one of the left and right traveling devices 3 and 3 is disconnected in the left and right turning operation area, so that any turning can be performed according to the operation amount of the turning operation means. By selecting the clutches 35, 36, and 37, the vehicle can turn with a turning radius corresponding to the reduction ratio of the turning clutches 35, 36, and 37 with the left and right traveling devices 3 and 3 always being driven, so that the field is not damaged as much as possible. In addition, the turning feeling can be improved.

Next, a description will be given of a case where the traveling direction of the combine is finely adjusted by, for example, aligning. For example, when finely adjusting the traveling direction to the left, pressing the left fine adjustment switch 9 provided on the upper part of the multi-lever 5 causes the left clutch / brake actuator 38 to operate at a certain interval.
The brake of the left clutch / brake 31 is released and the clutch is connected for a certain interval, but each of the swing clutches 35, 36, and 37 remains released and no power is transmitted to the ring gear 26 at all. Therefore, the traveling device 3 rotates with the driving force and loses the driving force, so that the fine adjustment of the body traveling direction can be easily performed.

Referring now to FIG. 12, which is a second embodiment of the present invention, a difference from the first embodiment is that a turning HST 61 is provided in place of various turning clutches. HST for turning according to the operation amount of
By changing the output rotation speed of the turning HST 6 arbitrarily, the left and right traveling devices 3 and 3 are always driven.
The turning can be performed with the turning radius corresponding to the reduction ratio of 1, and the turning feeling can be improved without breaking the field as much as possible.

In the case where the left and right traveling directions are finely adjusted, one of the left and right clutch brakes 31 and 32 is released from the brake and the clutch is disengaged in the same manner as in the first embodiment. Since no power is transmitted at all, the traveling device 3 runs out due to the lack of driving force, and fine adjustment of the aircraft traveling direction can be easily performed.

Referring now to FIG. 13, which is a third embodiment of the present invention, the rotation of the engine 17 is controlled by a left driving HS
The power that has been shifted to an arbitrary rotation speed by T71 and reduced to any of a high speed, a medium speed, and a low speed by the subtransmission 72 is transmitted to the left traveling device 3 via the left side clutch 73, The traveling device 3 also travels straight by being transmitted through the coupling clutch 74 and the right side clutch 75.

When the vehicle turns right, for example, the output rotation speed of the right drive HST 76 is arbitrarily changed according to the operation amount of the multi-lever 5 and the coupling clutch 74 is disengaged, so that the right traveling device 3 The power of the right drive HST 76 is transmitted via the right auxiliary transmission 77 and the right side clutch 75, and the speed reduction ratio of the right drive HST 76 is always maintained while the left and right traveling devices 3 and 3 are driven. The turning can be performed with a corresponding turning radius, and the turning feeling can be improved without deteriorating the field as much as possible.

Further, when finely adjusting the left and right traveling directions as in the first embodiment, the power is not transmitted at all by disengaging one of the left and right side clutches 73 and 75. Since the driving force is lost and the vehicle rotates, the fine adjustment of the aircraft traveling direction can be easily performed.

Referring to FIG. 14, which is a fourth embodiment of the present invention, the rotation of the engine 17 is controlled by the traveling HST.
The speed is changed to an arbitrary rotation speed by 81, and the power reduced by the sub-transmission device 82 to any one of high speed, medium speed and low speed is transmitted to the left and right traveling devices 3 via the left and right side clutches 83 and 84, thereby going straight. I do.

When the vehicle turns right, for example, the output rotation speed of the turning HST 88 is arbitrarily changed in accordance with the operation amount of the multi-lever 5 to connect the right turning transmission clutch 86 and disengage the side clutch 84. As a result, the turning HST is connected to the right traveling device 3 via the right auxiliary transmission 87, the right turning transmission clutch 86 and the right side clutch 84.
As a result, the power can be turned with the turning radius corresponding to the reduction ratio of the turning HST 88 while the left and right traveling devices 3 and 3 are always driven. Rings can be made well.

Further, when finely adjusting the left and right traveling directions as in the first embodiment, the power is not transmitted at all by disengaging one of the left and right side clutches 83 and 84. Since the driving force is lost and the vehicle rotates, the fine adjustment of the aircraft traveling direction can be easily performed.

[0033]

According to the present invention, a crawler traveling vehicle which turns by decelerating a traveling device inside a turn in accordance with an operation amount of a turning operation means provided in a driver's seat is provided. Providing direction fine adjustment means for fine adjustment,
In response to the operation of the direction fine adjustment means, the power to the traveling device inside the turning is cut off and the vehicle turns, while the operation area of the turning operation means is not provided with a position for cutting the power to the traveling device inside the turning. It is possible to easily perform fine adjustment of the aircraft traveling direction by operating the direction fine adjustment means, and always drive the left and right traveling devices during steering by operating the turning operation means. As a result, it is possible to make a turn without breaking the field as much as possible and to make a good turning feeling.

In a crawler traveling vehicle provided with turning operation means and direction fine adjustment means in a driver's seat, a traveling device is transmitted through a planetary reduction mechanism, and a clutch and a brake are provided upstream of a ring gear transmission of the planetary reduction mechanism. A turning clutch is provided, and the clutch
By releasing the brake and cutting off the power to the ring gear of the planetary reduction mechanism inside the turn, the power to the traveling device inside the turn is cut and turning, and the turning is performed according to the operation of the turning operation means. By releasing the brake of the inner clutch and brake, connecting the clutch and connecting the turning clutch, power is transmitted to the ring gear of the planetary reduction mechanism inside the turning, and the traveling device inside the turning is decelerated and turned. The operation of the direction fine adjustment means causes no power to be transmitted to the ring gear. Adjustment can be easily performed, and the left and right traveling devices are always driven by selecting an arbitrary turning clutch according to the operation amount of the turning operation means. In state it can pivot by turning radius corresponding to the reduction ratio of the turning clutch, without roughened as much as possible Hojo, yet turning feeling can be good.

In a crawler traveling vehicle provided with turning operation means and direction fine adjustment means in the driver's seat, the traveling device is transmitted through a planetary reduction mechanism, and a clutch and a brake are provided upstream of the ring gear transmission of the planetary reduction mechanism. A turning HST is provided, and the clutch from the inside of the turning brake is released and the clutch is connected according to the operation of the turning operation means, so that the power from the turning HST is transmitted to the ring gear of the planetary reduction mechanism inside the turning. While transmitting the power, the traveling device inside the turning is decelerated and turned, and the brake of the clutch / brake is released according to the operation of the direction fine adjustment means to transmit the power to the ring gear of the planetary reduction mechanism inside the turning. By turning off, the power to the traveling device inside the turning is cut off and turning is performed. Since no power is transmitted to the gears, the traveling device runs out of driving force and rotates with it, making it possible to easily make fine adjustments in the aircraft traveling direction and to reduce the amount of operation of the turning operation means. By arbitrarily selecting the output rotation speed of the turning HST according to
With the left and right traveling devices always being driven, the vehicle can turn with a turning radius corresponding to the speed reduction ratio of the turning HST, and the turning field can be minimized and the turning feeling can be improved.

In a crawler traveling vehicle provided with turning operation means and direction fine adjustment means in a driver's seat, a traveling device is transmitted through a side clutch, and a turning transmission clutch and a turning HST are provided upstream of the transmission of the side clutch. By disengaging the side clutch on the inside of the turn according to the operation of the turning operation means and connecting the turning transmission clutch on the inside of the turn to transmit the power from the HST for turning, the traveling device on the inside of the turn is decelerated. It is characterized in that, by driving and turning, the side clutch is disengaged in accordance with the operation of the direction fine adjustment means, thereby turning off the power to the traveling device inside the turn, thereby turning. As a result of the operation of the means, no power is transmitted to the side clutch at all, so that the traveling device loses the driving force and rotates with the aircraft. It is possible to perform fine adjustment of the row direction easily, turning H in accordance with the operation amount of the swing operation means
By arbitrarily selecting the output rotation speed of the ST, it is possible to make a turn with a turning radius corresponding to the reduction ratio of the turning HST while always driving the left and right traveling devices. Rings can be made well.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a combine embodying the present invention.

FIG. 2 is a perspective view of a driving operation unit.

FIG. 3 is a perspective view of a multi-lever.

FIG. 4 is a front view of the multi-lever.

FIG. 5 is a plan view of the auxiliary transmission lever guide.

FIG. 6 is a transmission system diagram of the transmission of the first embodiment.

FIG. 7 is a block diagram of a microcomputer.

FIG. 8 is an operation pattern diagram of the multi-lever in each turning mode.

FIG. 9 is a right side sectional view of the grain discharging device.

FIG. 10 is a right side sectional view of the grain discharging device.

FIG. 11 is a right side sectional view of the grain discharging device.

FIG. 12 is a transmission system diagram of a transmission according to a second embodiment.

FIG. 13 is a transmission system diagram of a transmission according to a third embodiment.

FIG. 14 is a transmission system diagram of a transmission according to a fourth embodiment.

[Explanation of symbols]

 Reference Signs List 3 Traveling device 5 Multi lever (turn operation means) 9 Left fine adjustment switch (Direct direction fine adjustment means) 10 Right fine adjustment switch (Direct direction fine adjustment means) 20 Planetary reduction mechanism 21 Planetary reduction mechanism 26 Ring gear 27 Ring gear 31 Left clutch / brake 32 Right clutch / brake 35 Slow turning clutch (Turning clutch) 36 Rapid turning clutch (Turning clutch) 37 Super pivot turning clutch (Turning clutch) 61 HST for turning 83 Left side clutch 84 Right side clutch 85 Left turning transmission clutch 86 Right Turning transmission clutch 88 HST for turning

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference)

Claims (4)

[Claims] 1. A crawler traveling vehicle that turns by decelerating and driving a traveling device (3) inside a turn in accordance with an operation amount of a turn operation means (5) provided in a driver's seat. Separately, fine direction adjusting means (9, 10) for finely adjusting the traveling direction of the aircraft are provided, and the fine direction adjusting means (9, 10) are provided.
In response to the operation, the power to the traveling device (3) inside the turning is cut off while the power to the traveling device (3) inside the turning is cut off in the operation area of the turning operation means (5). An operating device for a crawler traveling vehicle, wherein no position is provided. 2. In a crawler traveling vehicle provided with turning operation means (5) and direction fine adjustment means (9, 10) in a driver's seat, a traveling device (3) is transmitted via planetary reduction mechanisms (20, 21). The clutch / brake (3) is located upstream of the ring gear (26, 27) transmission of the planetary reduction mechanism (20, 21).
1, 32) and a turning clutch (35, 36, 37), and release the brakes of the clutch / brake (31, 32) in response to the operation of the direction fine adjustment means (9, 10). By turning off the power to the ring gears (26, 27) of the planetary reduction mechanism (20, 21), the power to the traveling device (3) inside the turning is cut off and turning, and the turning operation means (5) is turned off. Release the brakes of the clutch brakes (31, 32) inside the turning, connect the clutch, and turn the turning clutch (35, 36, 3).
7), the turning power is transmitted to the ring gears (26, 27) of the planetary reduction mechanism (20, 21) inside the turning, and the traveling device (3) inside the turning is decelerated to turn. An operation device for a crawler traveling vehicle, comprising: 3. In a crawler traveling vehicle provided with turning operation means (5) and direction fine adjustment means (9, 10) in a driver's seat, a traveling device (3) is transmitted via planetary reduction mechanisms (20, 21). The clutch / brake (3) is located upstream of the ring gear (26, 27) transmission of the planetary reduction mechanism (20, 21).
1, 32) and a turning HST (61), and release the brakes of the clutches and brakes (31, 32) in response to the operation of the direction fine adjustment means (9, 10) to rotate the planetary speed reduction mechanism inside the turning. (20, 21) ring gear (26, 2)
7) The power to the traveling device (3) inside the turning is cut off by turning off the power to the turning device, and the clutch / brake (31) inside the turning is turned off according to the operation of the turning operation means (5). , 32) by releasing the brake and connecting the clutch, the power from the turning HST (61) is transmitted to the ring gears (26, 27) of the planetary reduction mechanism (20, 21) inside the turning to turn. Inner traveling device (3)
An operation device for a crawler traveling vehicle, wherein the operation device decelerates and turns. 4. In a crawler traveling vehicle provided with turning operation means (5) and direction fine adjustment means (9, 10) in a driver's seat, a traveling device (3) is transmitted through side clutches (83, 84). The turning transmission clutches (85, 86) and the turning HS are provided upstream of the side clutches (83, 84).
T (88) is provided to disconnect the side clutch (83, 84) in response to the operation of the direction fine adjustment means (9, 10), thereby cutting off the power to the traveling device (3) inside the turn. In response to the operation of the turning operation means (5), the side clutches (83, 84) inside the turning are disconnected, and the turning transmission clutches (85, 86) inside the turning are connected, and the turning HST ( 88. An operating device for a crawler traveling vehicle, characterized in that the traveling device (3) is turned by decelerating the traveling device (3) inside the turn by transmitting the power from the device (88).