JPH03224415A - Traveling device of combine or the like - Google Patents

Abstract

PURPOSE:To obtain the title device lessening longitudinal inclination in levee crossing, etc., by rollingly attaching a vertically rockingly supported crawler frame having central rotary wheels to a pitching frame and setting a stopper to stop upward movement of the central rotary wheel. CONSTITUTION:In a traveling device of combine, etc., a pair of a left and a right crawlers 2 are attached to the lower side of a body 1, a pair of a left and a right crawler frames 4 having central rotary wheels 11 which support the upper part and the lower part of the crawlers at the longitudinal central parts of the crawlers are each vertically moved in parallel and rollingly attached to pitching frames 3 which control pitching of the body 1 in cooperation with link arms 10. The body 1 is equipped with a stopper to prevent the central rotary wheels 11 from moving upward and the upper part of the crawlers 2 pushed up by the central rotary wheels 11 is not brought into contact with the barrel part of the body 1 to lessen change of longitudinal inclination of the body 1.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a traveling device such as a combine harvester.

(Prior Art and Problems to be Solved by the Invention) In a crawler-type traveling device for a combine harvester, wheels at the front and rear center portions are provided so as to be able to swing up and down, so that they can be easily moved over ridges, etc. In this system, the lower and upper sides of the crawler are tensioned by the vertical movement of the center roller to prevent the wheels from coming off. When performing relative pitching control or rolling control, when the crawler is moved upward relative to the vehicle body to lower the vehicle body height, when this crawler is pushed up by the center wheel, the belly of the vehicle body may come into contact with other people, which is dangerous.

(Means for Solving the Problems) The present invention provides a pair of left and right crawler frames having center rollers that support the upper and lower sides of the crawler and are swingable up and down, relative to the vehicle body. A traveling device such as a combine harvester has a structure in which a pitching frame for pitching control is provided so as to be able to move up and down and roll, and a stopper for stopping the upward movement of the center wheel is provided on the vehicle body.

(Function) When pitching the vehicle body relative to the crawler, the tilt angle of the vehicle body in the longitudinal direction is changed and controlled by moving the pitching frame up and down, and when performing rolling control, either the left or right By moving the crawler frame of one crawler up and down with respect to the pitching frame, the inclination of the vehicle body in the left-right direction can be changed.

Even during such pitching or rolling, when local pressure is applied to the front and rear central portions of the crawler, the center roller is pushed up from the lower side, and the upper side is also pushed up. A stopper is provided at a certain position with respect to the vehicle body, and when the center wheel reaches the upper limit position, it is stopped by this stopper and the center wheel cannot be moved up any further.

(Effect of the invention) In this way, the lower part of the crawler is locally pushed up,
When the upper side of the center roller bulges upward, due to pitching or rolling of the vehicle body, even if the vehicle is at a low height, the center roller will be restricted by the stopper and will rise higher than the crawler. In addition, the upper limit position of this center roller becomes higher as the height of the car body increases, and the absorption of local pressure can be increased. It is possible to reduce changes in the front and rear inclination of the vehicle body.

(Example) In the case of a combine harvester, the vehicle body 1 mounts or supports a threshing device, a reaping device, an engine, etc., and a pair of left and right crawlers 2 is attached to the lower side thereof using a pitching frame 3, a crawler frame 4, etc. . pitching frame 3
The pitching frame 3 supports the front end of the pitching frame 3 with respect to the support leg 5 that projects downward from the vehicle body 1 so that the rear end can move up and down around a pitching shaft 6 in the lateral direction. A pitching cylinder 7 is provided between the vehicle body 1 and the pitching cylinder 7, which is expanded and contracted by hydraulic pressure, and the relative longitudinal inclination of the vehicle body 1 with respect to the pitching frame 3 is controlled by the expansion and contraction of the pitching cylinder 7.

The left and right crawlers 2 are mainly made of rubber material in the shape of air belts,
A drive sprocket 8 is provided on a wheel shaft 9 that protrudes from a transmission case integrally provided at the front end of the vehicle body 1 to the left and right open sides, and is provided on both left and right sides of the pitching frame 3 so as to be movable up and down by a pair of front and rear link arms 10. In the crawler frame 4, a center roller 11 is disposed at the front and rear center of the rear end roller 91, and a roller shaft 12 supporting the lower side of the crawler 2 is disposed before and after the center roller 11. Drive sprocket 8, end rolling shaft 9, center rolling shaft 1
1 and each transfer 12, the crawler 2 is wound and stretched to transmit rotation.

The crawler frame 4 is provided parallel to the pitching frame 3 by a link arm 10, and is moved up and down in parallel. The front link arm 10 is connected to the pitching shaft 6
It has a structure that rotates around the body.

13 is a support shaft of the rear link arm 10 relative to the pitching frame 3, and 14 is a support shaft of the link arm 10 relative to the crawler frame 4. These front and rear link arms 1
The upper ends of 0 are connected by a rod 15, and the rear link arm 1o is rotated with a rolling cylinder 16 that is controlled to expand and contract by hydraulic pressure with respect to the pitching frame 3, so that the front and rear link arms 10 can be connected to the pitching axis. 6 and the support shaft 13, the crawler frame 4 and the crawler 2 can be moved up and down. Further, the left and right crawlers 2 can each independently move up and down.

The central rolling shaft 11 is rotatably provided on a rolling wheel arm 18 that is pivotally supported 17 to be vertically movable with respect to the crawler frame 4.
It is configured to have a diameter larger than that of the other transfers 12 to support the lower and upper sides of the crawler 2. A stopper 19 is provided on the vehicle body 1, facing each of the left and right wheel rolling arms 18, and protrudes downward t to stop the upward rotation of the wheel rolling arms 18. This stopper 19
At the upper limit position of 1, the upper side of the crawler 2 pushed up by the central transfer 11 is set at such a position that it does not come into contact with the abdomen of the vehicle body 1.

The crawler 2 is rotated by the drive of the sprocket 8 and runs. Pitching control is performed by pitching cylinder 7.
When the pitching cylinder 7 is extended, the vehicle body 1 tilts forward downward relative to the crawler 2, and when it is shortened, the vehicle body 1 tilts backward downward relative to the crawler 2. 1 is rotated around a pitching shaft 6 at the front.

Rolling control is performed by expanding and contracting the left and right rolling cylinders 16, and when the rolling cylinders 16 extend, the link arm 10 rotates downward, so the crawler frame 4 moves downward parallel to the pitching frame 3. , the height of the crawler 2 relative to the vehicle body 1 is changed. Since the vertical movement of the rollers 2 is performed independently on the left and right sides, the inclination angle of the vehicle body 1 can be changed left and right.

Although such pitching control or rolling control can be performed manually, a tilt sensor or a horizontal sensor is provided to detect the tilt angle of the vehicle body 10 in the front-rear direction, left-right direction, etc. While detecting this, pitching control or rolling control is automatically performed to maintain the vehicle body 1 horizontally in the front and back or left and right).

When running over a ridge or over a ridge, when the center part of the crawler 2 is located at the top of the ridge, the lower side is pushed up, and the central transfer 11 is moved upward to move the upper side of the crawler 2. push up the section. Therefore, since the crawler 2 is tensioned and supported on the ground at the lower side facing the front and rear wheels 12, the crawler 2, vehicle body 1, etc. are less likely to swing in a see-saw manner and maintain a stable posture. You can run on it. Moreover, when traveling over such a ridge, the left and right crawlers 2 are moved down to raise the vehicle height, and the stopper 19 that regulates the center wheel 11 is also moved by the wheel arm. 1
8 becomes larger, so the central transfer 1 as above
1 allows for more stable driving by sufficiently absorbing the local pedal pressure.

[Brief explanation of drawings]

The figure shows one embodiment of the present invention, and FIGS. 1 and 2 are side views showing the operation. (Explanation of symbols) 1 Vehicle body 2 Crawler 1 2 6 9 Pitching frame Crawler frame Pitching shaft Pitching cylinder Center roller roller Rolling cylinder stopper

Claims (1)

[Claims] A pair of left and right crawler frames, which support the upper and lower sides of the crawler at the front and rear center portions and have center rollers that can swing up and down, are each moved up and down by a pitching frame that controls pitching relative to the vehicle body. A traveling device such as a combine harvester, which is configured to be rollable and has a stopper on the vehicle body that stops the upward movement of the center wheel.