JPS6010946Y2 - rubber crawler - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rubber crawler, and particularly to a rubber crawler for a snowmobile.

Generally, the lugs provided on the outer peripheral surface of a rubber crawler are arranged at an angle perpendicular to the circumferential direction of the crawler, and are arranged at intervals in the circumferential direction, but each lug is continuous in the width direction. For example, in the case of inclined lugs, the formed area is continuous over about half the width from the center to the edge of the crawler in the width direction, and in this case, the pitch between the lugs is relatively large, making it difficult to drive on snow. At this time, there is almost no effect of compacting the snow in the width and circumferential direction of the crawler.
Slips and sideslips were likely to occur, requiring extreme caution when driving.

The object of the present invention is to provide a rubber crawler having lugs arranged as described above, which has particularly high traction on snow and is free from side slipping. In an endless rubber body, core metals extending in the width direction of the rubber body and arranged in parallel at predetermined intervals in the circumferential direction, and tensile reinforcing strips that surround the entire core metal are embedded, and the rubber body In a rubber crawler that uses lugs on the outer enclosure, multiple rows of block-like lugs are formed on the core metal, and spikes are driven into the block-like lugs that correspond to the projection area of the core metal. distantly related to

Next, the present invention will be explained in more detail with reference to the accompanying drawings.

FIG. 1A is a plan view showing a part of the outer peripheral surface side of the first embodiment of the rubber crawler constructed according to the present invention, cut away on the left and right sides of the drawing, and 1 in the figure indicates the rubber crawler; is a belt-shaped endless rubber body, with protrusions 2 (see Figures 2 and 3) extending in the width direction and protruding from the inner circumferential surface of the endless rubber body at predetermined intervals in the circumferential direction of the rubber body. It is constructed by embedding parallel core metals 3 and tensile reinforcing strips 8 (FIGS. 2 and 3) made of a wire cord such as steel, which surrounds the entire core metals.

As shown in FIGS. 2 and 3, on the inner peripheral surface of the crawler 1, a wheel running surface area 4 is provided in the circumferential direction on each outer side of the derailment prevention protrusion 2 of the core metal 3. On the outer circumferential surface of the crawler corresponding to the running surface area, block-shaped protrusions 5 are arranged in a row in the circumferential direction as shown in FIG. 6 are installed in succession.

As can be understood from FIG. 1A, the block-shaped protrusion 5 is formed in series with a portion of the block-shaped lug 6.

Note that 7 in the figure is a sprocket engagement hole provided between adjacent core metals 3 at the center portion in the width direction of the crawler.

The opening in FIG. 1 shows a variation in which the block-like projection 5 described above is omitted.

FIG. 4 shows how the block-like protrusions 5 and block-like lugs 6 are compacted against the snow 9 when used on snow. The snow 9 that has entered the groove space 10 is
The leg surfaces 11 and tip surfaces 12 of the block-like protrusions 5 and block-like lugs 6 pressurize and tread as shown by the arrows.

A shearing force or frictional force is created between the compacted snow and the road surface, which increases traction and prevents skidding.

Furthermore, since the block-shaped protrusions 5 are arranged in a row corresponding to the wheel running surface area 4, even if the roller passes over the highly rigid core metal 3 and reaches the rubber-only part, the block-shaped protrusions 5 The supporting action of the aircraft prevents it from sagging and reduces the vibrations of the aircraft.

In the present invention, as described above, a plurality of rows of block-shaped lugs 6 are formed on the core metal, and spikes S are driven into the block-shaped lugs 6 corresponding to the projection area of the core metal.

In this case, the block-shaped lugs 6 may be arranged in a plurality of rows in either the longitudinal direction or the lateral direction of the crawler.

Of course, spikes may also be driven into the block-shaped protrusion 5 shown in FIG. 1A.

For example, a spike S having a shape as shown in FIG. 5 can be used, and such a spike S is driven into a spike hole H as shown in FIG. 6 with the lower flange portion F first.
The flange portion F is pushed into the enlarged diameter portion I deep inside the spike hole H, and is tightened and fixed with the head T slightly protruding from the surface of the lug 6.

FIG. 7 shows a situation in which spikes S are driven into a structure in which the block-shaped lugs 6 are arranged at an angle with respect to the circumferential direction of the crawler, and the block-shaped projections 5 are also formed at an angle. 1 shows a case where the present invention is applied to a crawler in which a block-like projection 5 and a part of the block-like lug 6 adjacent to this projection in the circumferential direction are formed in the shape of a truncated triangular pyramid, and in both cases, As in the case of FIG. 1, the formed groove spaces 10 provide an effect of increasing traction force and preventing skidding, and the same effect of the spikes is provided, resulting in a roller with more reliable operation.

Of course, the present invention is not limited to the pattern of block-like protrusions and lugs as shown, for example, the group of inclined lugs 6 and inclined protrusions 5 on either side of the row of sprocket retaining holes 7 shown in FIG. may be arranged so as to be shifted from each other in the circumferential direction of the crawler.

Further, the side slip prevention effect can also be obtained by shifting the spike placement positions so that they are at least not on the same line in the crawler width direction.

As described above, according to the present invention, by forming multiple rows of block-shaped lugs on the core metal, it is possible to obtain a large number of groove spaces for snow compaction in areas with high surface pressure, and therefore In addition, by driving the spikes into the block-shaped lugs that correspond to the projection area of the core metal, the spikes are struck at positions with high surface pressure, and therefore, they can be stepped on with high surface pressure. Spikes act on the hardened snow surface to reliably prevent skidding, and in this case, block-shaped protrusions are arranged in a row in the circumferential direction of the outer circumferential surface of the rubber crawler, and also in the width direction to correspond to the core metal. If a protrusion and lug pattern with block-shaped lugs is used in combination, the side-slip effect will be further increased.

[Brief explanation of the drawing]

Figure 1 A9 is a partial view of an embodiment of the rubber crawler according to the present invention viewed from the outer peripheral side, and Figure 2 is a partial view of ■-■ in Figure 1 A.
3 is a sectional view taken along the line ■-■ in FIG. The figure is a side view of the spike used in connection with the present invention, Figure 6 is a longitudinal cross-sectional view of the hole in the axial direction, Figure 7 is a partial view of another embodiment seen from the outer peripheral side, and Figure 8 is FIG. 6 is a similar partial view of another embodiment; The correspondence relationship between the main parts shown and the symbols is as follows. 1... Crawler, 3... Core metal, 4...
...Rolling wheel running surface area, S...Spike.

Claims (1)

[Scope of Claim for Utility Model Registration] 1 Core metals extending in the width direction of the rubber body and arranged in parallel at predetermined intervals in the circumferential direction within a belt-shaped endless rubber body, and tensile reinforcing thin strips surrounding the entire core metal. In the rubber crawler, a plurality of rows of block-shaped lugs are formed on the core metal, and block-shaped lugs corresponding to the projection area of the core metal are formed. Rubber crawler characterized by having spikes driven into the lugs 0 2 Utility model registration The rubber crawler according to claim 1, in which the spike driving position is shifted back and forth in the direction of rotation of the crawler. 3. A rubber crawler according to Claim 1 of the Utility Model Registration Claim, in which the spike placement positions are shifted so that they are at least not on the same line in the width direction of the crawler.