JPS621027Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an elastic endless track belt that is used by being attached to an agricultural vehicle such as a combine harvester, and is particularly suitable for running in muddy areas such as wet fields.

In general, an elastic endless track band is well known in which grounding lugs are formed on the outer circumferential surface of a band-shaped elastic endless body and arranged in parallel in the circumferential direction at appropriate intervals. Conventionally, in order to make such an elastic endless track band suitable for running on muddy areas, the parts between the lugs are cut out at both ends of the endless band-like endless body, thereby making the lateral ends of the lugs fit into the sides of the endless body. With fin-like parts protruding from the
It has been proposed that the fins be used to scrape mud so that even if the lugs become clogged with mud, the fins can maintain traction.

These fin-like parts themselves have the desired effect in muddy soil, but because they are made of an elastic material, for example, when driving over ridges or uneven fields, the fin-like parts can cause damage from the base to the inner circumferential direction. It is easy to bend, and in some cases, cracks may occur from the outer circumferential surface of the base, or the bent fin may come into contact with the wheels or the fuselage, damaging the fin. When scratching, the fins tend to bend in the circumferential direction from the base due to the resistance of the mud, causing problems such as cracks from the base and a decrease in traction force.

The purpose of the present invention is to eliminate the above-mentioned drawbacks and to propose an elastic endless track band with high traction efficiency and long life. In an elastic endless track body in which grounding lugs are arranged in parallel in the circumferential direction, and fin-like parts are provided by protruding the lugs to both sides of an endless body, the base part of the fin-like part is widened and reinforced. That's what I did.

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

FIG. 1 is a partial plan view of a conventional elastic endless track belt for muddy terrain, viewed from the ground surface side, in which 1 is a belt-shaped elastic endless body made of an elastic material such as rubber, and 2 is the endless body. The grounding lug 3 formed on the outer circumferential side is a sprocket hole that engages with a sprocket wheel. Of course, like a general crawler, a core metal is buried between the sprocket holes 3, and a tensile reinforcing material such as a wire cord is buried on the outer circumferential side of the core metal. As shown in the figure, notches 4 are provided in the interlug zones at both ends of the band-shaped endless elastic body 1, whereby fin-like portions 5 are formed at both ends of the lug 2, and the fin-like portions As mentioned above, when driving in a muddy area, the fins act to scrape the mud when running in the mud, and even if mud gets clogged between the lugs 2, mud removal is facilitated at the notches 4, so the fin-like parts The mud-scraping action is constantly provided, and thereby the traction force is also constantly provided.

The fin-like portions 5 are substantially made only of rubber material and have low rigidity, so they are easily bent and deformed depending on the conditions of the running surface, especially when the tip portion touches the ridge, or when the surface is uneven. When the fin-shaped part 5 rides on a convex part on the ground, it may bend greatly at the base toward the inner circumferential surface of the track belt, causing a risk of contact with the wheels or the fuselage, or a crack occurring from the outer circumferential surface of the base. Similarly, the raceway band is also likely to bend in the circumferential direction at the base, which may cause cracks to occur from the sides of the base and reduce the traction force.

In view of this, the present invention has been designed to increase the rigidity of the fins 5 by reinforcing their bases, thereby suppressing bending of the fins to a minimum regardless of the condition of the running surface. Examples of these are shown in FIG. 2 and below, but all of them commonly suggest that the root portion of the fin-like portion 5, that is, the transition portion from the grounding lug 2 to the fin-like portion 5, be widened. ing.

Fig. 2 shows a case where a rib 6 having an arcuate cross section is provided on the side surface of the base of the fin 5, and in this case, the arcuate cross-sectional shape of the rib 6 gradually increases from the ground contact surface toward the inner circumferential surface. The strength of the inner peripheral surface side portion of the base of the fin-like portion is particularly increased.
FIG. 3 shows a case in which a trapezoidal rib is provided instead of a rib with an arcuate cross-sectional shape, and FIG. This shows the case where it is provided. FIG. 5 shows a variation of the embodiment shown in FIG. 4, in which a triangular pyramid-shaped rib 6
The ridge line extends from the middle of the side surface of the lug to the edge of the main body 1.

FIG. 6 shows a case where the ridgeline portion of the triangular pyramid-shaped rib shown in FIG. 4 is chamfered, and FIG. 7 shows a variation thereof.

FIG. 8 shows an embodiment in which the base portion of the fin portion 5 is widened and tapered toward the tip. In this case, the rigidity of the fin portion is increased and the adjacent fin portions are The opposing side surfaces 7 of the portion 5 widen outward to provide the effect of pushing the mud outward, and the side surfaces 7 have a relatively gentle slope with respect to the ground, so the mud can be pushed out. A compaction effect occurs, thereby suppressing the amount of subsidence of the track belt. Furthermore, regarding the mud extrusion effect mentioned above,
The most favorable results have been obtained when the opening angle θ of the edge of the side surface 7 is 15 to 30 degrees, and the distance between the tips of adjacent fins is a, the distance at the base is b, and the protrusion length is If the distance is c, a≒c≒2b
It has been found that the greatest reinforcing effect can be obtained when the relationship dimensions are given as follows.

9 to 12 are equivalent to FIGS. 2 and 3, respectively.
This shows a modified version of the embodiment shown in Figures 1, 4 and 6, in which the width of the fins 5 is made smaller than the width of the ground lug 2 so as to improve soil discharge from between the fins 5.

As can be easily understood, the shape of the rib 6 for widening the base portion of the fin-shaped portion 5 is not limited to the one shown in the drawings, and various other variations are applicable, and in some cases, In addition to the effect of the widened portion, the rigidity may be further increased by extending the embedded core bar to the root portion.

As described above, according to the present invention, by widening and reinforcing the base of the fin, the rigidity of the fin increases and the degree of bending deformation is reduced, resulting in the occurrence of cracks at the base. In addition, the rigid fin-like portions provide a high traction force, and thus a long-life and high-performance elastic endless track belt is obtained.

[Brief explanation of the drawing]

Fig. 1 is a partial plan view of a conventional elastic endless track band viewed from the outer peripheral surface, and Figs. 2 to 12 are partial plan views of various embodiments of the present invention viewed from the outer peripheral surface. be. The correspondence relationship between the main parts shown and the symbols is as follows. 1... Band-shaped elastic endless body, 2... Grounding lug, 5
...fin-like part.

Claims (1)

[Scope of utility model registration request] An elastic endless track band is formed by forming grounding lugs arranged in parallel in the circumferential direction at appropriate intervals on the outer peripheral surface of a belt-shaped elastic endless body, and protruding the lugs to both sides of the endless body to provide fin-like parts. An elastic endless track belt characterized by widening and reinforcing the base of the fin-like part.