JPH0524560A - Crawler travel device for combined harvester and thresher - Google Patents

Abstract

PURPOSE:To provide a crawler travel device which lessens sinking at the time of traveling in a swamp field, scarcely damages a paddy field and has an improved traveling stability. CONSTITUTION:A crawler travel device for combined harvester and thresher is formed in a gently inclined shape as the rear side is slightly higher than a crawler grounding part 8 at the bottom side of the device by setting a distance L1 from the machine body center of gravity lower position to the rear end part of the device as more than two times of a distance L2 from the machine body center of gravity lower position to the front end part of the crawler grounding part 8 in the flat hard ground surface grounding state and simultaneously, and by setting a distance L3 from the machine body center of gravity lower position to the rear end part of the crawler grounding part 8 as roughly 1.5 times of the distance 12 from the machine body center of gravity lower position to the front edge part of the crawler grounding part 8.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In the conventional crawler traveling device, the lower ground contact surface portion is linear over almost the entire area, and the lower ground contact surface is almost entirely flat. It was set at a position slightly forward of the front-rear center position of the ground contact surface portion, and the distance from the center of gravity to the front end of the ground contact portion was set to be about 40 to 45% of the entire length of the ground contact portion ( For example, the actual Kaisho 63-1
80481 gazette).

[0003]

In the conventional structure described above, the front side of the machine body tends to float up due to the reaction force of the traveling drive when traveling in the wetland. This is to ensure the stability of the posture when traveling. However, in the combine,
A grain tank for storing grains is provided at the rear of the fuselage, and as the grain is stored in the tank during cutting operation, the weight increases and the rear weight becomes too heavy, and the rear side of the fuselage sinks greatly. There is a possibility that the vehicle may get stuck and the running stability may deteriorate. The above-mentioned problems were remarkable especially in a soft wetland or when an attachment such as a heavy straw bundling device was attached to the rear of the fuselage. An object of the present invention is to solve the above-mentioned problems by making a reasonable improvement.

[0004]

A characteristic configuration of the present invention is that the distance from the lower position of the body weight center to the rear end of the crawler traveling device is from the lower position of the body weight to the front end of the crawler ground contact portion in the flat ground contact state. And the distance from the lower position of the body weight center to the rear end of the crawler ground contact portion is approximately 1.5 times the distance from the lower position of the body weight center to the front end of the crawler ground contact portion. Set to
The rear side of the crawler traveling device on the lower surface side of the crawler grounding portion is formed in a gently sloped shape that rises rearward.

[0005]

Since the distance from the lower position of the body weight center to the rear end is set to be more than twice the distance to the front end, it is possible to suppress the sinking into the mud due to the increase in the total groundable area. At the same time, even when the weight of the rear part of the fuselage becomes large and the rear part of the wetland sinks close to the hard plate in the mud, it is possible to suppress the tilt angle of the fuselage to be smaller than the amount of the subsidence. In addition, since the rear part of the lower surface of the crawler is provided with a gentle slope that rises backward, mud can escape from the gap in the upward rising part when turning in the field, and the increase in driving force during turning operation is made as small as possible. Can be suppressed. Moreover, the positional relationship of the center of gravity of the machine body with respect to the crawler ground contact portion in the flat hard disk ground contact state can be set in a front balance state that is almost the same as the conventional one. As a result, driving safety is ensured.

[0006]

Therefore, by improving the crawler traveling device in a rational form, it is possible to suppress the increase of the traveling driving force during the turning operation, reduce the sinking of the machine during traveling in the wetland, and roughen the field. This has made it possible to improve driving safety.

[0007]

Embodiments will be described below with reference to the drawings. Figure 1
Shows a combine crawler traveling device. This crawler traveling device is configured by winding an endless rubber crawler belt 4 around each of a front drive wheel body 1, a rear tension wheel body 2 and a plurality of ground guide wheel bodies 3. Each of the wheels 1, 2 and 3 is supported by a track frame 6 connected to a machine frame 5 for mounting and supporting a machine (not shown),
The grounding guide ring 3 is provided with a large number of core metal protrusions 7 provided on the inner surface of the belt.
It is configured to prevent the crawler belt 4 from coming out and coming off.

The distance L1 from the lower position X of the machine weight center G to the rear end of the crawler traveling device is set from the lower position X of the machine weight center to the crawler grounding portion 8 in the flat hard disk grounding state.
The distance L3 from the lower body weight center position X to the rear end portion of the crawler ground contact portion 8 is set to be twice or more the distance L2 to the front end portion of the crawler ground contact portion 8 from the lower body weight center position X. The distance L2 to the portion is set to about 1.5 times, and the rear side portion 9 of the lower surface side of the crawler traveling device with respect to the crawler ground contact portion 8 is formed in a gentle slope that rises backward. For example, taking a combine for cutting 5 rows as an example, when the distance from the lower position of the body weight center X to the front end of the crawler ground contact portion 8 is set to 600 mm, the crawler travels from the lower position of the body weight center X. The distance to the rear end of the apparatus is set to about 1200 mm or more, and the distance from the lower position of the body weight center X to the rear end of the crawler ground contact portion 8 is about 900 mm. Therefore, the total length of the crawler grounding portion 8 is about 150.
The front-rear length on the lower surface side of the crawler traveling device is about 1800 millimeters or more.
With this structure, as shown in FIGS. 2 and 3, when the thickness H of the mud surface is constant, the downward inclination angle due to the rear subsidence of the airframe is smaller than that of the conventional structure. Will be things. Further, during the turning operation, it is possible to prevent the mud from coming out from the gap S on the lower surface side of the crawler traveling device and increasing the driving reaction force.

It should be noted that although reference numerals are given in the claims for facilitating the comparison with the drawings, the present invention is not limited to the configuration of the accompanying drawings by the entry.

[Brief description of drawings]

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

FIG. 2 is a side view of the crawler traveling device showing a mud sinking state.

FIG. 3 is a side view showing a mud sinking state in the conventional structure.

[Explanation of symbols]

 8 Crawler ground contact area L1, L2, L3 Distance X Lower position of machine weight

Claims (1)

Claims: 1. A crawler grounding portion in a state where the distance (L1) from the machine body weight lower position (X) to the rear end of the crawler traveling device is from the machine body weight lower position (X) to the flat hard disk grounding state. The distance (L3) from the lower position of the body weight center to the rear end of the crawler ground contact portion (8) is set to a lower position of the body weight center ( X) to the front end of the crawler grounding part (8), which is approximately 1.5 times the distance (L2), so that the rear side of the crawler grounding part (8) on the lower surface side of the crawler traveling device rises rearward. Combined crawler traveling device formed in a gently sloping shape.