JPS5852869B2 - Elastic track belt for muddy ground - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to agricultural vehicles such as combines, harvesters, etc.
The present invention relates to an elastic endless track belt (hereinafter referred to as "crawler") attached to a vehicle such as a truck, etc., and particularly relates to an elastic endless track belt for muddy land suitable for running on muddy ground such as wet rice fields.

Conventionally proposed crawlers suffer from a large loss in tractive force, especially when traveling in muddy areas such as wet fields, because mud accumulates on the front in the direction of travel, and the crawlers must move while pushing away this mud.

The present invention provides an elastic endless track belt for muddy terrain that eliminates this drawback, and is characterized by a large number of core metals arranged horizontally at predetermined intervals, and In a crawler comprising a tensile reinforcing material surrounding a gold row embedded in a rubber elastic body and propulsion lugs provided at regular intervals on the outer circumferential surface of the rubber elastic body, the width on the inner circumferential surface of the rubber elastic body The outer end in the direction is made higher inward than the rolling wheel passing surface, and the non-lug portion on the outer peripheral surface gradually increases toward the inner peripheral side in the wing section from near both ends of the core bar to the outer end in the width direction. The outer end of the inclined surface in the width direction is located at approximately the same horizontal position as the wheel passing surface, or is located on the inner peripheral side thereof.

Thus, according to the present invention, the central portion of the crawler body including the core metal row and the central lug portion below it carry most of the weight of the vehicle body, and the outer circumferential surfaces of both wing portions that are detached from the core metal support the central portion. Since the crawler body has a flat or curved surface and is gradually inclined toward the inner circumference, when traveling in a wet field, the center part of the crawler body and the center part of the lug sink to the hard soil layer inside the wet field, and both wing parts adjacent to the center part sink. In this case, the crawler curves toward the inner circumferential side and advances while expelling mud to the left and right, so mud hardly accumulates on the front surface of the crawler, and the loss of traction force is minimal.

The present invention will now be described in more detail with reference to the accompanying drawings.

First, in FIG. 1, which schematically shows the state of a conventional crawler when traveling in a muddy area, 1 is a crawler, 2 is a wheel supporting a vehicle body, and 3 is a driving sprocket.

As described above, when the conventional crawler is driven in the direction of the arrow, mud a accumulates on the front surface and the crawler travels while pushing this mud, resulting in a large loss of traction force.

In FIGS. 2 to 4 showing embodiments of the present invention, 11 is a main body of the raceway band, 12 is a widthwise extending lug integrally formed with the main body at the outer periphery of the raceway band, and the main body is a core metal. 1
The main body center part 15 includes a tensile reinforcing material 14 such as a wire cord surrounding the rows of No. 3 and the core metal rows, and wing parts 16 extending on both sides of the main body center part. The inner circumferential surface of the wing section 16 is higher than the wheel passing surface 17 provided on the inner circumferential surface of the central section 15 (see Fig. 4), and the outer circumferential surface P of the wing section 16 is embedded in the main body. The core bar 13 is gradually inclined inward from the vicinity of both ends to the outer end in the width direction. They are located at approximately the same horizontal position or on the inner circumferential side.

The lug 12 formed on the outer circumferential surface is composed of a central lug portion 18 below the main body center portion 15 and a lower wing lug portion 19 below the wing portion 16.

The lug height of the center lug portion 18 is set to be approximately the same as the lug height of a general crawler for normal road running, and the lug height of the lower wing lug portion 19 is set to be approximately 1.5 to 2.5 times that height. is preferred.

Various shapes can be applied to the lug 12 within the scope of the present invention, and for example, a general shape as shown in FIG. 5 may be used.

However, it has been proven that setting the inclination angle θ of the leg meat 12' of the lug 12 to the perpendicular plane across the crawler from 30° to 60° is most advantageous in terms of the obtained traction force, mud distribution, and removal ability. ing.

Further, the outer circumferential surface P of the wing portion 16 may be a curved surface as shown in FIG.

The outer end P' in the width direction of the inclined surface is located as close to the inner circumference as possible so that the surface P is easily bent, and on the other hand, a certain level of strength is maintained at the end in the width direction to prevent excessive bending. For this reason,
The outer end is located at approximately the same horizontal position as the rolling wheel passing surface 17 or more toward the inner circumferential side, and the outer end in the width direction of the inner circumferential surface, that is, the inner circumferential side surface of the wing section 16 It is necessary to bulge inward from the surface 17 and make it higher.

In addition, 20 in the figure is an engagement hole with a driving sprocket.

As described above, when the crawler according to the present invention travels, for example, in a wet field, since the outer circumferential surface P of both wing parts 16 is inclined in advance, the crawler distributes mud to the left and right while traveling, and does not accumulate in the front part. It is possible to always obtain propulsion force without loss, and since there is no core metal in the blade part, it can be bent inward, and the amount of mud thrown out acts to further enhance the removal effect.

Further, the above-mentioned first slope P acts to absorb the resistance of mud when the crawler turns, and also has the effect of improving the turning performance of the crawler.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view illustrating the running state of a conventional crawler mounted on a vehicle body, FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, FIG. 5 is a partial side view of another embodiment, and FIG. 6 is a side view of still another embodiment. It is a partial perspective view seen from the side. The correspondence relationship between the main parts shown and the symbols is as follows. 12... Propulsion lug, 13... Core metal,
14... Tensile reinforcing material, 16... Wing section,
17... Rolling wheel passing surface, P... Inclined surface (
outer circumferential surface of the wing), y...outer end in the width direction (of the inclined surface).

Claims (1)

[Claims] 1. A large number of core metals arranged horizontally at predetermined intervals and a tensile reinforcing material surrounding the rows of core metals are embedded in a rubber elastic body, and the outer periphery of the rubber elastic body is In an elastic endless track belt comprising propulsion lugs at regular intervals on the surface, the outer end in the width direction of the inner circumferential surface of the rubber elastic body is made higher inward than the wheel passing surface, and the outer edge of the outer circumferential surface is The non-lug portion is gradually inclined inward in the wing portion from near the end of the core bar to the outer end in the width direction, and the outer end in the width direction of the inclined surface is aligned with the roller passing surface. An elastic endless track belt for muddy ground, characterized in that the tracks are located at approximately the same horizontal position or on the inner circumferential side. 2 The pushing surface of the lug is approximately 3σ with respect to the vertical plane across the track belt.
The elastic track belt for muddy areas according to claim 1, characterized in that it has an inclination angle of ~60°.