JP2550946Y2 - Crawler traveling device for agricultural machinery - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler traveling apparatus mainly used for agricultural machines such as combine harvesters, and more particularly to an improvement of a crawler belt having a function of discharging soil in a crawler belt.

[0002]

2. Description of the Related Art When a harvesting operation is performed in a wet field using a combine equipped with a crawler traveling device, muddy soil that has entered the crawler belt due to the sinking of the crawler traveling device is located on the outermost part of the outer wheel. It gradually grows in a lump at the front of the ring, and when this lump can no longer be held in the crawler belt, it rolls out to the outside of the traveling device and climbs over the root of the crop planted on the uncut ground. The reaping device rushes into the lodge of the crop or the soil mass left near the root of the crop in the next reaping process, causing damage and early wear of the blade.
And the like. As one means for solving such a problem, for example, Japanese Unexamined Patent Publication No.
As shown in Japanese Patent Application Publication No. 3 (1993), a disk scraper for discharging the earth is provided in an inclined position at a lateral side of a tension wheel around which a crawler belt is wound, and the disk scraper is configured to be rotationally driven by the tension wheel. The soil that is transported backwards on the inner peripheral surface of the crawler belt is scraped by a rotating disk scraper and discharged to the outside of the crawler belt to avoid the growth of large soil mass Something to do is suggested. The above-mentioned proposed means forcibly drives the disk scraper, so that the discharging function is high, and the intended purpose can be sufficiently achieved.However, since many parts and assembling man-hours are required, it is difficult to make it expensive. It was difficult to apply to low-priced small machines. Therefore, as a simple and inexpensive earth discharging means that can be easily applied to a small machine, as shown in FIG. Elastic cylinder 14
Is attached to the outer surface of the crawler belt 5 to guide the soil mass transferred rearward into the gap between the elastic cylinder 14 and the crawler belt 5 to be crushed. When elastically deformed upward by a force, a structure in which a crushed earth mass is pushed out laterally outward by a component force that is pushed laterally outward by the deformed outer surface of the elastic cylinder 14 has been considered.

[0003]

As described above, the earth discharging means using the elastic cylinder has a practical advantage that it is extremely simple in structure, can be manufactured at low cost, and is easy to use for a small machine. However, the desired earth removal function will not be exhibited unless the elastic cylinder is introduced between the elastic cylinder and the crawler belt and the elastic cylinder is not elastically deformed. There was a tendency for stagnation in the front part of the cylinder, and the discharge action did not work well. The present invention has been made in view of such a point, and it is an object of the present invention to further improve the earth discharging ability by making a simple improvement to the earth discharging means using the elastic cylinder.

[0004]

In order to achieve the above object, the present invention is characterized in that at least the outermost part of the outer wheel type grounding wheel located at the rearmost part has the same diameter as the grounding wheel. The present invention is characterized in that the elastic tube is attached in an outwardly cantilever shape, and the outer end edge of the elastic tube is partially recessed.

[0005]

According to the above construction, even if the earth mass transferred to the rear of the elastic cylinder on the inner circumferential surface of the crawler belt and arriving at the front of the elastic cylinder is not well introduced into the gap between the elastic cylinder and the crawler belt, it remains elastic. The soil mass enters into the recess formed partially on the outer edge of the cylinder, which triggers the soil mass to be introduced into the gap between the elastic cylinder and the crawler belt. A part of the cylinder is elastically deformed, and the earth mass is extruded laterally outward by a component force that is pushed laterally outward by the inclined outer surface of the elastic cylinder. In addition, the outer edge of the elastic cylinder that rotates together with the contact wheel is repeatedly displaced inward and outward at a position close to the inner circumferential surface of the crawler belt. The soil on the belt will have an outward scraping action.

[0006]

[Effect of the Invention] As is apparent from the above description, the present invention provides the inner peripheral surface of the crawler belt by a very simple modification that merely changes the shape of the outer end edge of the elastic cylinder provided on the ground rolling wheel. It is possible to appropriately introduce the earthen lump that is loaded and sent rearward between the elastic cylinder and the crawler belt so that the extruded soil discharging function by the elastic deformation of the elastic cylinder can be exerted well, and the outer edge of the elastic cylinder By the scraping action of this, the soil discharging function can be further improved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a side surface of a crawler traveling device mounted on an agricultural machine such as a combine, and FIG. 3 shows a schematic plan view thereof. This crawler traveling device includes a plurality of ground wheels which are freely rotatably disposed between a driving wheel 2 at a front end portion of a track frame 1, a tension wheel 3 at a rear end of the track frame 1, and the two wheels 2 and 3 of the track frame 1. A rubber crawler 5 is wound around the rolling wheel 4. Each grounding wheel 4 is configured as an outer wheel type grounding wheel in which a pair of left and right wheels 4a rolls on the outer side of a metal core projection 5a protruding from the inner peripheral surface of the crawler belt 5. As shown in FIG. 1, the ring body 4a1 formed in a bowl shape with an outward opening is fitted on the left and right ends of a support shaft 7 that is freely rotatably supported through a bearing 6 on a boss 1a provided on the track frame 1 via a bearing 6. At the same time, the opening of the wheel body 4a is closed by a cover plate 8 which also serves as a fixing washer for each wheel body 4a. As shown in FIG. 4, a pair of metal seal rings 10 supported by a rubber elastic ring 9 is provided between the base of each of the ring bodies 4a and the boss 1a.
Is sealed with an O-ring 12, and a lubricating oil such as grease is stored in the annular gap S. It is configured as follows.

A rubber elastic cylinder 13 is attached to the outer side of the ground contact wheel 4A located at the rearmost portion for discharging the earth.
As shown in FIG. 1, the elastic cylinder 13 is fixedly held at one end between the inner periphery of the ring body 4 a and the outer periphery of the cover plate 8 so as to project outward in a cantilever shape. The end is inclined with respect to the wheel axis, and a part of the outer edge in the circumferential direction is recessed. According to the above configuration, the earth mass transferred on the inner circumferential surface of the crawler belt 5 and transferred rearward is guided to the gap between the elastic cylinder 13 and the crawler belt 5 and crushed, and the elastic cylinder 13 is crushed and reacted. When the elastic body 13 is elastically deformed upward, the earth mass is extruded laterally outward by a component force that is laterally outwardly pushed by the deformed outer surface of the elastic cylinder 13. The elastic cylinder 13 and the crawler belt 5
Is difficult to be introduced into the gap between the elastic cylinder 13 and the recessed portion P
From the elastic cylinder 13 and the crawler belt 5. In addition, the rotation of the elastic cylinder 13 causes its outer edge to be repeatedly displaced in and out near the inner peripheral surface of the crawler belt 5, and discharges the soil on the crawler belt 5 laterally and outward.

[Another Embodiment] The elastic cylinder 13 may have a slightly expanded shape. In the above embodiment, the outer end edge of the elastic cylinder 13 is recessed at only one location in the circumferential direction, but may be formed at a diagonal position, for example. Also, the grounding wheels 4 other than the rearmost portion may be provided with the elastic cylinders 13 so that each of the grounding wheels 4 discharges the earth.

[0010] In the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a vertical rear view of a ground contact wheel located at the rear end.

FIG. 2 is a side view of the crawler traveling device.

FIG. 3 is a schematic plan view of a crawler traveling device.

FIG. 4 is an enlarged sectional view showing a seal portion of the ground contact wheel;

FIG. 5 is a longitudinal rear view of a ground contact wheel provided with a conventional proposed soil discharging means.

[Explanation of symbols]

 4A Ground contact wheel at the end 13 Elastic cylinder

Claims (1)

(57) [Scope of request for utility model registration] 1. An elastic cylinder (13) having substantially the same diameter as the grounding wheel (4A) is outwardly cantilevered at least on the outer side of the grounding wheel (4A) located at the rearmost part. And a crawler traveling device for an agricultural machine in which the outer edge of the elastic tube (13) is partially recessed.