JPH06227446A - Crawler traveling device for combine and the like - Google Patents

Abstract

(57) [Abstract] [Purpose] The grounding wheels 5, 6, 7 which stretch the crawler 1 are moved back and forth to move the center of gravity of the machine body back and forth. A roller wheel frame 4 is provided below a drive sprocket 2 around which a crawler 1 is wound and an end roller 3 to arrange a grounding wheel group along a grounding surface. In front of and behind the wheel frame 4, the front grounding wheel 6 and the rear grounding wheel 7 at the front and rear ends are moved back and forth with respect to the middle grounding roller 5 in the front and rear center of the grounding wheel. Then, the ground phase of the crawler 1 is changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler traveling device used for a combine or the like.

[0002]

2. Description of the Related Art Even in a crawler traveling device that travels in a weak field such as a combine, the vehicle body tilts back and forth due to mowing work conditions and forward / backward movement of the vehicle body. It is difficult to maintain a stable attitude of the aircraft. In such a case, conventionally, there is a mode in which a chassis mounted with a working unit such as a threshing device and the entire crawler traveling device are relatively moved in the front-rear direction to move the center of gravity of the machine body in the front-rear direction. However, the corresponding structure is complicated because the structure becomes complicated, and especially the transmission-related position with respect to the traveling system transmission device changes. Further, in a mode in which the pair of front and rear parallel link mechanisms move the pair of left and right crawlers up and down with respect to the vehicle body, the ground contact phase of the crawlers can be slightly moved forward and backward, but this is not preferable because the vehicle height always changes. .

[0003]

The present invention provides a crawler 1.
Below the space between the drive sprocket 2 and the end roller 3 around which the wheel is wound, a roller frame 4 for arranging a ground roller group along the ground contact surface is provided. Before and after the roller frame 4, Among the grounding wheels, the front grounding roller 6 and the rear grounding roller 7 at the front and rear ends are moved forward and backward with respect to the middle grounding roller 5 in the front and rear central part to change the grounding phase of the crawler 1. And the configuration of a crawler traveling device such as a combine.

[0004]

When the center of gravity of the machine body is moved to the front side or the rear side, the front grounding roller 6 and the rear grounding roller 7 are appropriately moved in the front-rear direction with respect to the middle grounding roller 5. Do not change the ground contact length of the crawler 1 or the vehicle height by
The center of gravity in the front-back direction can be changed. At this time,
In the form in which the drive sprocket 2 is provided at the front end,
In the state where the front and rear ground contact wheels 6, 7 are moved to the rear side and the machine body center of gravity position is moved to the front side, the front side between the drive sprocket 2 of the crawler 1 and the front ground contact roller 6 has a right angle. Becomes smaller, which makes it easier to run up against the ground contact surface. or,
On the contrary, in the state where the front and rear ground contact wheels 6, 7 are moved to the front side and the center of gravity is moved to the rear side, in the rear side portion between the end roller wheel 3 of the crawler 1 and the rear ground contact roller 7. , The heading angle becomes smaller.

As described above, the vehicle height and the ground contact length of the crawler 1 are hardly changed, and the ground contact phase of the crawler 1 is moved back and forth to move the body weight center position.
With a stable and simple structure, it is possible to maintain the front-rear equilibrium of the aircraft, and when the crawler 1 sinks in a wetland, etc., the center of gravity of the crawler moves in the traveling direction and the angle of the crawler 1 decreases, causing the crawler to sink. It is easy to escape from.

[0006]

EXAMPLE A combine crawler traveling device has a pair of left and right rolling wheel frames 4 along a front-back direction supported by a supporting leg 9 below a vehicle body 8 on which a mowing device, a threshing device, a control device, an engine and the like are mounted. The grounding rollers 5, 6, 7 are arranged along each of the roller frames 4. Further, the end rolling wheels 3 located on the rear side of the vehicle body are supported by the brackets 10 above the rear portion of the rolling frame 4, and the upper rolling wheels 11 are mounted on the brackets 12.
Is supported by.

The drive sprocket 2 is mounted on the sprocket shaft 15 in the axle housing 14 projecting to the left and right sides of the traveling transmission case 13 on the front end side of the vehicle body 8 and is transmitted through the transmission device in the traveling transmission case 13. . A rubber material is wound around the constituent main body and the crawler 1 across the pair of left and right drive spckets 2, the end roller 3, the ground rollers 5, 6, 7, and the upper roller 11, respectively.
It can be driven by the transmission rotation of the drive sprocket 2.

Each of the left and right wheel frames 4 is made of a square pipe material, and sliding frames 16 and 17 are slidably fitted in the front and rear ends of the front and rear ends, respectively. The front and rear grounding wheels 6, 7 are attached to the tip portions of these sliding frames 16, 17.
Is rotatably mounted, the front and rear sliding frames 16 and 17 are connected by a piston rod 18, and the piston located at the center of the piston rod 18 is connected to the rolling frame 4
By fitting the pipe 21 passing through the hydraulic control valve 20 into the hydraulic areas formed on the front and rear end sides of the hydraulic cylinder 19 by fitting the hydraulic cylinder 19 fixed to the hydraulic cylinder 19, the piston is operated by the hydraulic pressure. The front and rear sliding frames 16 and 17 can be integrally moved back and forth. The front and rear grounding wheels 6, 7 are the sliding frame 1
Two shafts are attached to 6, 17, but one shaft may be arranged.

The central grounding roller 5 in the center is the roller frame 4
It is axially mounted on a roller wheel arm 22 that is pivotally supported up and down, and is elastically pressed downward by a spring or the like. A plurality of the center grounding wheels 5 may be arranged in the front and rear, or may be axially mounted at a fixed position of the wheel frame 4 without moving up and down. The relationship between the roller mounting position of the roller frame 4 having the grounding rollers 5, 6, 7 and the like and the shaft mounting position of the sprocket shaft 15 of the drive sprocket 2 and the end roller 3 is appropriately changed up and down. The crawler 1 which has the height of
A front side portion F is formed between the front grounding wheel 6 and the drive sprocket 2, and a rear side portion R is formed between the rear grounding roller 7 and the end roller 3. Further, the front-rear length between the front and rear ground contact wheels 6 and 7 is made shorter than the front-rear length between the upper drive sprocket 2 and the end roller 3, and the front side portion F and the rear side portion R are Has a configuration capable of forming angles A and B that are smaller than a right angle with respect to the horizontal ground plane. Further, the pistons of the hydraulic cylinders 19 on the left and right wheel frames 4 can be operated separately. Therefore, during turning, only the one side, for example, the crawler 1 on the outer circumferential side of the turning may be moved to the traveling direction side.

The hydraulic circuit having the hydraulic pump P, the relief valve 23, etc. is provided with a control valve 25 for operating the mowing up / down cylinder 24 for moving the mowing device up and down to move the front and rear grounding wheels 6, 7. A pair of left and right slide valves 26 and 27 for removing the grains, and an auger upper and lower cylinder 2 for taking out the stored grains in the Glen tank
8, an auger control valve 29 for controlling 8, and a push cylinder 3 for operating a steering clutch, a steering brake, etc.
A steering control valve 31 for controlling 0, a power steering valve 32, and the like are provided. The hydraulic control valve 20
Is constituted by the front and rear slide valves 26 and 27, and is operated by an output from a controller having a microcomputer. T is a tank port, and 33 is a stroke sensor for feedback control that detects the amount of movement of the piston rod 18 and the front and rear grounding wheels 6, 7. Further, 34 and 35 are forward and reverse vehicle speed sensors.

When the front and rear grounding wheels 6, 7 are moved backward when moving forward, and are moved forward when moving backward, the forward and backward inclination of the vehicle body due to the driving reaction force can be reduced by the movement of the center of gravity. In addition, the advancing angles A and B of the front side portion F or the rear side portion R on the advancing side are reduced, and the mud pushing phenomenon can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of a crawler traveling device.

FIG. 2 is a side view showing the operating state thereof.

FIG. 3 is a plan view thereof.

FIG. 4 is a rear view of a part thereof.

FIG. 5 is a control hydraulic circuit diagram thereof.

FIG. 6 is a control block diagram of a front and rear grounding wheel unit.

[Explanation of symbols]

 1 Crawler 2 Sprocket 3 End Roller 4 Roller Frame 5 Middle Ground Roller 6 Front Ground Roller 7 Rear Ground Roller

Claims (1)

[Claims] 1. A roller wheel frame 4 is provided below a drive sprocket 2 around which a crawler 1 is wound and an end roller 3, and a roller wheel frame 4 is provided for arranging a ground roller group along a ground surface. Before and after the frame 4, the front grounding wheels 6 and the rear grounding wheels 7 at the front and rear ends of the grounding wheels are moved forward and backward with respect to the middle grounding wheels 5 in the front and rear central portions. A crawler traveling device such as a combine characterized by changing the grounding phase.