JP2001180542A - Traveling part structure for agricultural working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the workability, traveling property and maneuverability of an agricultural working machine. SOLUTION: In this traveling part structure for agricultural working machine, a drive wheel and a driven wheel are rotatably arranged on the front and rear ends of a lateral pair of truck frames, respectively, and a crawler is suspended between the drive wheel and the driven wheel. A driven wheel forward and backward moving means for longitudinally moving the driven wheel forward and backward is interposed between the truck frame and the driven wheel, and a crawler pulling means for energizing the crawler upward, thereby pulling the crawler is provided on the truck frame, so that the crawler pulling means pulls the crawler in interlocking to the forward and backward movement of the driven wheel by the driven wheel forward and backward moving means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling structure of an agricultural work machine.

[0002]

2. Description of the Related Art The traveling structure of a conventional agricultural working machine includes:
A pair of left and right track frames is mounted on the lower part of the body frame, and drive wheels and driven wheels are rotatably mounted on front and rear ends of the track frames, and a crawler belt is suspended between the drive wheels and the driven wheels.

[0003] In such a conventional traveling section structure of an agricultural machine, the distance between the drive wheel and the driven wheel attached to the truck frame is always constant, and the contact length between the crawler and the field and the exit angle are always constant. It was constant.

[0004]

However, in an agricultural work machine, it is necessary to travel, work, and turn on the ground in various states such as a rugged field, a soft field, and a paved road. Therefore, there is a need for the development of a traveling part structure that improves traveling performance, workability, and turning performance by easily changing the contact length between the crawler belt and the field and the exit angle according to the state of the traveling ground. I was

[0005]

Therefore, according to the present invention, a driving wheel and a driven wheel are rotatably disposed at the front and rear ends of a pair of left and right track frames, respectively, and a driving wheel and a driven wheel are provided between the driving wheel and the driven wheel. In the running part structure of the agricultural work machine that suspends the track,
A driven wheel advance / retreat means for moving the driven wheel forward and backward in the front-rear direction is interposed between the track frame and the driven wheel, while the crawler belt is pulled by urging the crawler belt upward on the track frame. Crawler belt pulling means is provided for moving the driven wheel forward and backward by the driven wheel advance / retreat means, and the crawler belt pulling means is configured to pull the crawler belt in conjunction therewith.

In addition, a rolling wheel is disposed immediately behind the driven wheel, and the driven wheel is turned between the track frame and the driven wheel in the vertical direction about the axis of the rolling wheel. Accordingly, a driven wheel elevating means for raising and lowering the driven wheel is provided.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A traveling part structure of an agricultural machine according to the present invention has a driving wheel and a driven wheel rotatably disposed at front and rear ends of a pair of left and right track frames, respectively. The crawler is suspended between them.

In addition, a driven wheel advancing / retreating means is provided between the track frame and the driven wheel for moving the driven wheel back and forth in the front-rear direction, while urging the crawler belt upward on the track frame. Thus, the crawler belt pulling means for pulling the crawler belt is provided, and when the driven wheel advances and retreats by the driven wheel advance / retreat means, the crawler belt pulling means pulls the crawler belt in conjunction therewith.

[0009] Therefore, the contact length between the field scene and the crawler can be changed by operating the driven wheel advancing / retracting means to move the driven wheel forward and backward, and the type of the working machine mounted on the machine Therefore, the weight balance before and after the machine body can be adjusted appropriately, so that the workability, traveling performance, and turning performance of the agricultural work machine can be improved.

[0010] Further, according to the present invention, a rolling wheel is provided at a position immediately behind a driven wheel, and the driven wheel is arranged vertically between a track frame and the driven wheel around the axis of the rolling wheel. A driven wheel elevating means for raising and lowering the driven wheel by rotating is provided.

[0011] Therefore, by operating the driven wheel elevating means to raise and lower the driven wheel, it is possible to change the contact length between the field scene and the crawler belt and also change the exit angle between the field scene and the crawler belt. This also improves the workability, running performance, and turning performance of the agricultural work machine.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a view showing a tractor 1 having a traveling unit structure of an agricultural work machine according to the present invention.
Has a pair of left and right crawler-type traveling parts 3, 3 arranged at lower left and right positions of the body 2.

The traveling section 3 has a driving wheel 5 rotatably disposed at a rear end of the track frame 4 extended in the front-rear direction, and a driven wheel 6 rotatably disposed at a front end of the track frame 4. A crawler belt 7 is suspended between the drive wheel 5 and the driven wheel 6. In the figure, reference numeral 8 denotes a rolling wheel rotatably disposed below the track frame.

Between the track frame 4 and the driven wheel 6, there is provided driven wheel advancing / retreating means 9 for moving the driven wheel 6 forward and backward.

The driven wheel advance / retreat means 9 includes the track frame 4
The base end of the hydraulic cylinder 10 is connected to the front end of the hydraulic cylinder 10 via a tension adjusting mechanism 11 for adjusting the tension of the crawler belt 7, and the driven wheel 6 is rotated by the distal end of the cylinder rod 37 of the hydraulic cylinder 10. It is movably mounted.

The tension adjusting mechanism 11 has a cylindrical support pipe 12 attached to the tip of the track frame 4.
The base end of the guide rod 13 is slidably inserted in the front-rear direction inside the guide rod 13, and a bracket 14 is inserted into the distal end of the guide rod 13.
, And the base end of the hydraulic cylinder 10 is attached to the bracket 14. In the figure, 15 is a stopper.

The tension adjusting mechanism 11 has an annular urging force adjusting plate 16 slidably inserted in the front-rear direction outside the support pipe 12 so as to slide between the front surface of the urging force adjusting plate 16 and the rear surface of the bracket 14. A crawler biasing spring 17 is interposed therebetween, and a return spring 18 having a higher spring constant than the crawler biasing spring 17 is interposed between the rear surface of the urging force adjusting plate 16 and the front surface of the track frame 4. I have. In the figure, 19 is a stopper.

Further, the tension adjusting mechanism 11 has a biasing force adjusting hydraulic cylinder 20 mounted on the outer peripheral surface of the front end of the support pipe 12, and the tip of the cylinder rod 21 of the biasing force adjusting hydraulic cylinder 20 is connected to the biasing force adjusting plate 16. The urging force adjusting hydraulic cylinder 20 is brought into contact with the front surface, and is interlockingly connected to the operation lever 22 via a valve 23.

When the urging force adjusting hydraulic cylinder 20 is advanced, the urging force adjusting plate 16 moves rearward along the support pipe 12, so that the distance between the urging force adjusting plate 16 and the bracket 14 is increased, and The urging force is reduced by the expansion of the urging spring 17, and accordingly, the urging force of the driven wheel 6 pressing the crawler belt 7 is also reduced.

On the other hand, when the urging force adjusting hydraulic cylinder 20 is retracted, the urging force adjusting plate 16 moves forward along the support pipe 12, so that the distance between the urging force adjusting plate 16 and the bracket 14 is reduced, and The urging spring 17 is shortened to increase the urging force, and accordingly, the urging force of the driven wheel 6 pressing the crawler belt 7 also increases.

In this manner, the tension adjusting mechanism 11 causes the driven wheel 6
Increases or decreases the urging force for pressing the crawler belt 7 so that the tension of the crawler belt 7 can be adjusted.

In this embodiment, the operating lever 22 is connected to the urging force adjusting hydraulic cylinder 20 in an interlocking manner so that the tension of the crawler belt 7 can be adjusted manually.
Instead of using a shift lever or a speed detection sensor, the hydraulic cylinder 20 for adjusting the biasing force is expanded and contracted according to the vehicle speed, and the tension of the crawler belt 7 is reduced at high speed running to reduce the required power of the engine. Can also.

Between the upper part of the track frame 4 and the crawler belt 7, crawler belt pulling means 24 for urging the crawler belt 7 upward to pull the crawler belt 7 is provided.

The crawler belt tensioning means 24 has a base end of an urging spring 25 attached to the middle part of the track frame 4, and a tension roller 26 rotatably attached to a distal end of the urging spring 25. Is made to contact the inside of the crawler belt 7 by the urging force of the urging spring 25.

When the driven wheel 6 is moved forward and backward by the driven wheel advance / retreat means 9, the crawler belt pulling means is moved in conjunction therewith.
24 pulls the track 7.

That is, when the hydraulic cylinder 10 of the driven wheel advance / retreat means 9 is shortened and the driven wheel 6 is retracted rearward,
Along with this, the tension roller 26 presses the crawler belt 7 upward by the urging force of the urging spring 25 of the crawler belt pulling means 24 so that the crawler belt 7 is pulled.

As described above, in this embodiment, the driven wheel advance / retreat means 9 for moving the driven wheel 6 forward and backward in the front-rear direction is interposed between the track frame 4 and the driven wheel 6.
Crawler belt pulling means 24 for pulling the crawler belt 7 on the track frame 4 by urging the crawler belt 7 upward.
When the driven wheel 6 is moved forward and backward by the driven wheel advance / retreat means 9, the crawler belt pulling means 24 is configured to pull the crawler belt 7 in conjunction therewith, so that the driven wheel 6 When the vehicle advances forward, the contact length between the field scene and the crawler belt 7 becomes longer, the contact pressure of the crawler belt 7 is reduced, and the running part 3 can be prevented from sinking into the field. On the other hand, when the driven wheel 6 is retreated backward by the driven wheel advance / retreat means 9, the contact length between the field scene and the crawler belt 7 is shortened, and high-speed traveling is possible, and rapid turning is possible. Become.

Further, the contact length between the field scene and the crawler belt 7 can be changed by operating the driven wheel advancing / retreating means 9 to move the driven wheel 6 back and forth in the front-rear direction. The weight balance before and after the machine body can be appropriately adjusted according to the type of the work machine, and the workability, running performance, and turning performance of the agricultural work machine can be improved.

FIG. 3 is a view showing a traveling section 27 as another embodiment. The traveling section 27 has a driving wheel 29 rotatably disposed at the rear end of a track frame 28 extended in the front-rear direction. On the other hand, a driven wheel 30 is rotatably disposed at the front end of the track frame 28, and a crawler belt 31 is suspended between the driving wheel 29 and the driven wheel 30. In the figure, reference numeral 32 denotes a rolling wheel rotatably disposed below the track frame 28.

Between the track frame 28 and the driven wheel 30, a rotating shaft of a rolling wheel 32 disposed at a position immediately behind the driven wheel 30.
A driven wheel lifting / lowering means 34 for raising and lowering the driven wheel 30 by rotating the driven wheel 30 in the vertical direction about the axis of 33 is provided.

The driven wheel elevating means 34 is provided with a rotating shaft 33 of the rolling wheel 32.
The base end of the support 35 is attached to the upper
While the driven wheel 30 is rotatably mounted at the distal end of the hydraulic cylinder 36, the base end of the hydraulic cylinder 36 is rotatably mounted on the front upper portion of the track frame 28, and the cylinder rod of the hydraulic cylinder 36 is
An intermediate portion of the support 35 is rotatably attached to the distal end of 37. The support 35 is provided with a tension adjusting mechanism 38 having the same configuration as that described above in the middle.

The driven wheel lifting / lowering means 34 causes the tip end of the support 35 to rotate vertically about the axis of the rotating shaft 33 of the rolling wheel 32 by expanding and contracting the hydraulic cylinder 36. The driven wheel 30 is raised and lowered.

As described above, in the present embodiment, the rolling wheel 32 is disposed immediately behind the driven wheel 30, and between the track frame 28 and the driven wheel 30, about the axis of the rolling wheel 32. By rotating the driven wheel 30 in the vertical direction, the driven wheel
Since the driven wheel elevating means 34 for raising and lowering the 30 is interposed, the contact length between the field scene and the crawler belt 31 can be changed by operating the driven wheel elevating means 34 to move the driven wheel 30 up and down. In addition to this, it is possible to change the exit angle between the field scene and the crawler belt 31.

For this reason, the driven wheel is raised and lowered by the driven wheel
When 30 is lowered, the contact length between the field scene and the crawler belt 31 becomes longer, the contact pressure of the crawler belt 31 is reduced, and the traveling unit 27 can be prevented from sinking into the field, When the driven wheel raising / lowering means 34 raises the driven wheel 30, the contact length between the field scene and the crawler belt 31 is shortened, so that high-speed traveling is possible and sharp turning is possible.

Further, by operating the driven wheel elevating means 34 to move the driven wheel 30 up and down, the contact length between the field scene and the crawler belt 31 can be changed. Accordingly, the weight balance before and after the machine body can be appropriately adjusted, and the workability, traveling performance, and turning performance of the agricultural work machine can be improved.

[0037]

The present invention is embodied in the form described above and has the following effects.

(1) In the present invention, a driven wheel advancing / retracting means for moving the driven wheel forward and backward in the front-rear direction is interposed between the track frame and the driven wheel, and the track belt is moved upward on the track frame. Crawler belt pulling means for pulling the crawler belt by urging toward the crawler belt is provided, and when the driven wheel is moved forward and backward by the driven wheel advance / retreat means, the crawler belt pulling means is configured to pull the crawler belt in conjunction therewith. Therefore, the contact length between the field scene and the crawler can be changed by operating the driven wheel advance / retreat means to move the driven wheel forward and backward in the front-rear direction, depending on the type of the working machine attached to the machine. Since the weight balance before and after the machine body can be appropriately adjusted, the workability, running performance, and turning performance of the agricultural work machine can be improved.

(2) According to the present invention, a rolling wheel is provided at a position immediately behind the driven wheel, and a rolling wheel is provided between the track frame and the driven wheel.
Since the driven wheel elevating means for raising and lowering the driven wheel by rotating the driven wheel in the vertical direction about the axis of the rolling wheel is provided, the driven wheel elevating means is operated to operate the driven wheel elevating means. By raising and lowering the driving wheel, it is possible to change the contact length between the field scene and the crawler belt, and also to change the exit angle between the field scene and the crawler belt. Performance and turning performance can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a tractor having a traveling unit structure of an agricultural work machine according to the present invention.

FIG. 2 is a side view showing a tension adjusting mechanism.

FIG. 3 is a side view showing a tractor as another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tractor 3,27 Running part 4,28 Truck frame 5,29 Drive wheel 6,30 Follower wheel 7,31 Crawler belt 8,32 Rolling wheel 9 Follower wheel advance / retreat means 11 Tension adjustment mechanism 24 Crawler belt pulling means 26 Tension roller 34 Follower wheel Lifting means

Claims (2)

[Claims] 1. A traveling agricultural machine having a pair of left and right track frames having drive wheels and driven wheels rotatably disposed at front and rear ends thereof, and a crawler belt suspended between the drive wheels and driven wheels. In the part structure, between the track frame and the driven wheel, a driven wheel advance / retreat means for moving the driven wheel forward / backward in the front-rear direction is provided, while the track frame is urged upward to the track frame. A crawler belt pulling means for pulling the crawler belt by means of the crawler belt, and when the driven wheel is moved forward and backward by the driven wheel advance / retreat means, the crawler belt pulling means is configured to pull the crawler belt in conjunction therewith. Running part structure. 2. A traveling agricultural machine having a pair of left and right track frames having driving wheels and driven wheels rotatably disposed at front and rear ends thereof, respectively, and a crawler belt suspended between the driving wheels and driven wheels. In the partial structure, a rolling wheel is disposed immediately behind the driven wheel, and between the track frame and the driven wheel, the driven wheel is turned in the vertical direction about the axis of the rolling wheel. A traveling unit structure for an agricultural work machine, comprising a driven wheel elevating means for elevating and lowering a driven wheel.