JP2546091B2 - Crawler type traveling device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawl-type traveling device and is used for a traveling vehicle body such as a combine.

[0002]

2. Description of the Related Art Conventionally, as an apparatus of this kind, for example, Japanese Utility Model Application No. 60-109902 (Japanese Utility Model Application No. 62-16571).
No.) microfilm is provided with drive wheels and idler wheels arranged at the front and rear ends, and a rocking roller consisting of a pair of rollers arranged between the drive wheels and idler wheels. ,
Disclosed is a crawler type traveling device characterized in that the crawler is wound around the idler wheel and the rocking roller.

In the microfilm of Japanese Utility Model Application No. 63-81466 (Japanese Utility Model Laid-Open No. 2-2291), drive wheels and idler wheels are provided at the front and rear ends, and between the drive wheels and idler wheels. Fixed front and rear rolling wheels, a plurality of central rolling wheels arranged between the front and rear rolling wheels, and the plurality of central rolling wheels in a state in which the vertical rolling cannot be performed. A hydraulic device capable of arbitrarily pressing downward is provided, and the roller is wound around the drive wheel, idler wheel, front rolling wheel, rear rolling wheel, and central rolling wheel. A traveling system is disclosed.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The microfilm disclosed in Japanese Patent No. 9902 (Japanese Utility Model Laid-Open No. 62-16571) has a plurality of oscillating rolling wheels arranged between a drive wheel and an idle wheel, so that there is little inclination or vibration of a vehicle body even in a field with severe unevenness. It is intended to realize stable running.

However, it does not have a function of changing the grounding length of the crawler, and since the grounding length of the crawler inside the turning is long at the time of turning, a large grounding resistance is received and smooth turning cannot be performed, and However, there is a disadvantage that the farm scene is damaged by the chlora. The microfilm disclosed in Japanese Utility Model Application No. 63-81466 (Japanese Utility Model Laid-Open No. 2-2291) pushes down a plurality of central rollers downward during turning, thereby shortening the grounding length of the crawler. , The ground resistance is reduced, the turning is done smoothly, and the chlora is intended to prevent the field scene from being roughened.

However, all of the front wheels, the rear wheels, and the plurality of central wheels cannot be vertically swung, and the unevenness of the field scene can be absorbed during traveling on rough roads or over ridges. It is not possible to suppress the tilt and vibration of the aircraft. Further, when the plurality of central wheels are pushed downward during turning, the grounding length of the chlora is shortened, but the grounding pressure itself of the chlora grounding portion is increased. At this time, since the central wheel cannot swing up and down, the rise of the ground contact pressure rather picks up irregularities in the field scene sensitively, resulting in violent vibration of the machine body.

The crawler-type traveling device according to the present invention performs safe and reliable traveling on rough roads, across ridges, and turning, and maintains a long ground contact length during normal traveling to exert sufficient propulsive force. The objective is to create a device that enables stable running and shortens the grounding length of the crawler on the turning center side when turning the vehicle body so that the turning can be performed smoothly and without destroying the field scene as much as possible.

[0008]

The present invention takes the following technical means in order to achieve the above object. That is,
Drive wheels 1 and idler wheels 2 arranged at the front and rear ends, and vertically movable front and rear rollers 5a, 5b and rear wheel 6a, which are arranged between the drive wheels 1 and idler wheels 2 in the front-rear direction. 6b, front and back
To the front side of the front wheels 5a, 5b located at
Front wheel 5a is located and is located in front and back
The rear wheel located on the rear side of the rear wheels 6a, 6b
A spring 8 for constantly urging the partial wheel 6b downward.
8'and of the front wheels 5a, 5b located at the front and rear
Front wheels 5b located on the rear side of the house and front and rear
Is located on the front side of the rear rolling wheels 6a, 6b
And a plurality of central focusing wheel 4 before and after disposed between the rear track roller 6a and, a spring 15 which always presses and biases downward in multiple central carrier rollers 4 a universal vertical swing states before and after the The drive wheel 1, the idler wheel 2, the front wheels 5a and 5b, the rear wheels 6a and 6b, and the front and rear central wheels 4 are crossed.
This is a structure of a crawler-type traveling device characterized in that it is configured by winding a la 3.

[0009]

In the crawl-type traveling device of the present invention, the drive wheels 1 are driven and rotated to drive the crawlers 3 to travel. At this time, the load of the machine body is mainly received by the front rolling wheels 5a and 5b, the rear rolling wheels 6a and 6b, and the central rolling wheel 4. The central roller 4 is urged downward by a spring 15. Therefore, the central roller 4
Can be raised against the pressing force of the spring 15 when it receives a large pushing force from the field. Moreover, the plurality of central rolling wheels 4 in the front-rear direction are respectively in the vertical direction.
The front wheels 5a, 5b and the rear wheels 6a, which swing to
It is also possible to swing up and down together with 6b.

Therefore, when traveling on rough roads or over ridges, the front wheels 5a, 5b, the rear wheels 6a, 6b and the plurality of central rollers 4 follow the unevenness of the field scene. In order to oscillate up and down or up and down. By this, the tilt and vibration of the aircraft are suppressed,
You can run smoothly. Further, for example, at the time of turning, a centrifugal force in the outward turning direction is generated due to the weight of the vehicle body, thereby reducing the load applied to the crawler 3 inside the turning.

As a result, the front and rear central rolling wheels 4 on the inside of the turning move downward due to the pressing force of the spring 15, whereby the grounding length of the crawler 3 is shortened and the turning is smooth and smooth. It can be done without roughening the field. Further, at this time, due to the downward movement of the plurality of front and rear central rollers 4, the winding circumference of the crawler 3 on this side is increased. In this case, however, the front portions located in the front and rear are located.
The front wheel 5a located on the front side of the wheel 5a, 5b
And the rear side of the rear wheels 6a and 6b located at the front and rear
The rear roller wheel 6b located at the position is rocked upward, and this change in circumferential length can be absorbed, and the tension of the crawler 3 can be appropriately maintained.

As described above, running on rough roads, running over ridges, and turning can be performed smoothly, and at the time of turning, the field scene can be performed without roughening. On the other hand, during normal running such as straight running, the front wheel 5a and the rear wheel 6b are constantly urged downward by the springs 8 and 8 ', so that the left and right cross wheels are driven.
The ground contact length of the rollers 3, 3 can be maintained long from the front roller 5a through the central roller 4 to the rear roller 6b.

As a result, a large ground contact area of the crawler 3 is ensured and a ground contact pressure is low, so that the crawler 3 can travel without sinking even in a soft land such as a wet field and can exert a sufficient driving propulsive force. .

[0014]

An embodiment of the present invention will be described below.
The drive sprocket (driving wheel) 1 is configured to be driven by bearings on an axle of a transmission case 10 provided in the front part of a chassis 9 as conventionally known, and left and right side clutches provided inside. It is connected to a side brake (not shown) so that power can be intermittently applied or braking can be applied to the left and right individually.

The tensioned rolling wheel (idling wheel) 2 is provided at the rear portion of the traveling frame 11 of the chassis 9 so as to be movable back and forth. The crawler 3 is made of rubber as an endless belt and is wound around the drive sprocket 1 and the tension roller 2. The central roller 4 has three rollers 4a, 4b, 4
A mounting arm 13 is provided at the axial center of the rolling wheel 4b, which is disposed inside the intermediate portion of the crawler 3 by bearing c on the coupling body 12.
It is configured to be supported by. And the mounting arm 13
Is bent in a V shape and the middle part is pivotally attached to the fuselage, and the other end is provided with a hydraulic cylinder-14 and a buffer spring.
It is configured to be capable of swinging by connecting with 15.

The hydraulic cylinder 14 extends like the switching valve 16 shown in the hydraulic circuit of FIG. 4 so that the connecting body 12 can be moved downward by pressure oil, but it can be freely contracted on the contracted side. The oil can be returned to the tank. The buffer spring 15 for tensioning the mounting arm 13 causes the central rollers 4a, 4b, 4c to be tensioned downward so as to maintain the same level as the front rollers 5a, 5b and the rear rollers 6a, 6b. Are configured.

Therefore, the central wheels 4a, 4b, 4c
Is operated by the operation of the hydraulic cylinder-14, and the front wheel 5a,
5b and the rear wheels 6a, 6b, and when the switching valve 16 is neutral, the oil returns to the tank and is acted by the buffer spring 15. As shown in FIG. 5, the hydraulic cylinder 14 and the buffer spring 15 are arranged on both sides of the traveling frame 11 and housed within the width of the crawler 3.

The front wheels 5a and 5b are pivotally attached to both ends of a V-shaped swinging arm 7 having an intermediate portion pivotally attached to the machine body as a fulcrum a, thereby forming a bogie type. There is. On the other hand, as for the rear wheels 6a and 6b, like the above-mentioned front wheels 5a and 5b, two wheels 6a and 6b are axially attached to both end portions of the V-shaped mounting arm 7 '. It is pivotally attached to and is configured to swing freely.

Then, the above two swing arms 7, 7 '.
As shown in FIG. 1, the springs 8 and 8 ′ are configured to work in a direction in which the outer rolling wheels 5 a and 6 b are pressed downward. Therefore, the two wheels 5a and 6b are closed.
The spring 8 and 8'prevents the pulling of the roller 3 from being pulled upward by the tension of the roller 3, and the ground length of the roller 3 can be maintained.

The buffer spring 15 is constructed so that its tension can be adjusted. Then, the crawler 3 operates the power steering lever 17 in the cockpit to disengage one of the side clutches, and when the side brake is continuously applied, the croller on the side on which the braking force works is interlocked with it. -The hydraulic cylinder 14 on the side of the central rollers 4a, 4b, 4c of the rotor 3 is configured to be extendable.

In the combine shown in the embodiment, a thresher 18 is mounted on a chassis 9, and a cutting and conveying frame 19 is attached to the front part thereof so as to be vertically rotatable. In the configuration of the embodiment, the left and right crawlers 3 can be independently moved downward by operating the tilt lever 20, and the levelness of the chassis can be changed.

Therefore, the adjustment range can be further expanded by combining the leveling changing device with the vertical moving devices for the central rollers 4a, 4b, 4c. Next, the operation will be described. First, when the work is started while starting the prime mover and driving the rotating parts of the machine body, the crawler 3 is driven by the drive sprocket 1 to propel the chassis 9.

Then, the grain culms in the field are mowed by the mowing device provided in the mowing and conveying frame 19 at the front part, and are supplied to the threshing machine 18 by the conveying device to undergo the threshing action. In this way, the combine performs the cutting and threshing work. When the crawler 3 travels on an ordinary flat ground, the central wheels 4a, 4b, 4c receive the cushioning action of the cushioning springs 15 via the connecting body 12 and the mounting arm 13 so that each of the front and rear wheels. It is pressed downward while maintaining the same level as that of the wheels 5a, 5b, 6a, 6b.

In the crawler 3, the drive sprocket 1 and the rolling wheels 5a and 6b located at the positions closest to the tensioned rolling wheel 2 are both subjected to tension to be moved upward. But,
At that time, the swinging arms 7 and 7'are replaced by springs 8 and 8 '.
When the outer side of the roller 5a is pressed downward, the outer side of the roller 5a is pushed downward in balance with the upward tension of the crawler 3.
And 6b press the crawler 3 against the ground.

As described above, the crawler 3 has a long ground contact length and can be stably propelled. Next, the crawler 3 adapts to the surface of the ridge so that the front wheels 5a, 5b and the rear wheels 6a, 6b are constructed in a bogie manner when riding over a small high portion such as a ridge. You can drive reliably.

Next, the case of turning will be described.
One side clutch is disengaged by the operation of the power steering lever 17, and the operation is further continued to apply a side brake to give a braking action to the crawler 3. Then, black
Hydraulic cylinder 14 on the side where braking action is applied to LA-3
The switching valve 16 switches to the oil feeding side and extends.

Along with this, in the crawler 3, the rolling wheels 4a, 4b, 4c are pushed downward from the front and rear rolling wheels 5a, 5b, 6a, 6b via the mounting arm 13 and the connecting body 12. The ground contact portion is only the central wheel 4a, 4b, 4c. Therefore, the crawler 3 can turn the undercarriage 9 in a state where the pushing of the soil is reduced and the surface of the field is not destroyed on the braking side, and the horsepower consumption is small.

[Brief description of drawings]

FIG. 1 is a side view of a main part according to an embodiment of the present invention.

2 is a side view of the detail of FIG. 1 according to an embodiment of the present invention.

FIG. 3 is a block circuit diagram showing an embodiment of the present invention.

FIG. 4 is a hydraulic circuit diagram according to the embodiment of the present invention.

FIG. 5 is a side sectional view of the embodiment of the present invention.

FIG. 6 is a side view of the combine according to the embodiment of the present invention.

[Explanation of symbols]

 1 Drive Wheel 2 Idler Wheel 3 Crawler 4 Central Roller Wheel 5a Front Roller Wheel 5b Front Roller Wheel 6a Rear Roller Wheel 6b Rear Roller Wheel 8 Spring 8'Spring 15 Spring

Claims (1)

(57) [Claims] 1. A drive wheel 1 and an idler wheel 2 arranged at front and rear ends, and front and rear swingable front wheels 5a, 5b arranged between the drive wheel 1 and the idler wheel 2 in the front-rear direction. Rear wheel 6
a, 6b and the front wheels 5a, 5 located at the front and rear
front wheel 5a located on the front side of b, and front
The rear side of the rear rolling wheels 6a, 6b positioned rearward
And the springs 8 and 8'which constantly urge the rear wheel 6b located in the downward direction, and the front portion located in the front and rear.
The front wheel 5 located on the rear side of the wheel 5a, 5b
b and the rear wheels 6a, 6b located at the front and rear
It is arranged between the rear wheel 6a located on the front side of
A plurality of central focusing wheel 4 before and after, more central track roller 4 before and after the
Is provided with a spring 15 for constantly pressing downward in a freely swingable state, the drive wheel 1, idler wheel 2, front wheels 5a, 5b, rear wheels 6a, 6b, front and rear central wheels. 4. A crawler-type traveling device characterized in that it is constructed by winding a crawler 3 over four.