JPS5932576A - Resilient endless belt of crawler - Google Patents

Abstract

PURPOSE:To prevent the middle part of a belt-like main body from being bent so as to avoid disengagement of wheels by embedding a laterally laid reinforcement in a thickened part in a wrapped manner. CONSTITUTION:Since an endless belt is sufficiently reinforced by forming a thickened part 12 in the middle part thereof, the belt 1 is scarcely bent. Therefore, the dimensional variation in distance between guide projections 3A and 4A and between wheels hardly occurs and an inclination angle theta is also reduced, hence preventing wheels from coming off. Furthermore, a laterally laid reinforcement 14 is embedded in the thickened part 12 just in the wrapped manner, hence perfectly preventing the belt from being bent at the middle part thereof. Since any deflection may be thus prevented and a resilient part is additionally formed between reinforcements 3 and 4, any crack can not be produced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an elastic crawler track which is formed entirely of an elastic material such as rubber and has an endless shape, and in which reinforcing bodies in the band r1j1] direction are arranged in rows in the longitudinal direction of the band. , suitable for driving on uneven t1m or on roads with steps such as curbs, and in the band + lj direction 2.
The main purpose is to prevent derailment by preventing bending at the boundary between the reinforcing bodies in the rows, that is, at the center of the belt-like body.

2. Description of the Related Art Elastic crawlers used in endless traveling devices are known which are made entirely of rubber or other elastic materials.

In this elastic crawler belt, reinforcing bodies (core metals) made of metal scraps are buried at regular intervals in the longitudinal direction of the belt for the purpose of supporting the load and retaining the driving engagement claws.

By the way, the applicant has previously proposed the reinforcement body as an elastic crawler track for a crawler buried in two rows in the belt direction.
It was disclosed in Publication No. 2146 and has been well received.

However, in the conventional example, the rigidity of the boundary portion of the corresponding reinforcing body in the belt [1] direction, that is, the crawler central portion and both crawler side portions, is approximately equal, resulting in material savings and
Since the thickness of the belt-like main body is made as small as possible for the purpose of reducing weight, there is a risk that bending at the center of the crawler track may occur, for example, when driving on uneven ground or on a road surface with a step such as a curb.

Such a bending phenomenon at the center of the crawler track must be prevented as it may lead to derailment, and if the track is repeatedly bent and restored, the center of the track will quickly fatigue, which is disadvantageous in terms of durability.

Therefore, in order to prevent the above-mentioned refraction, if the thickness of the entire crawler track is increased and the rigidity of both the center and side parts is increased, the entire track becomes extremely large and overweight. ,
This results in a decrease in ground pressure, which not only reduces running performance on soft ground but also increases costs.

Also, if the rigidity of both the center and side parts is increased,
When running on bumps, uneven terrain, etc., there is no part for the load to escape, and the center part becomes curved, making it impossible to obtain sufficient effects.

Therefore, the present invention has been devised in order to solve the problems of the conventional example. Therefore, in the present invention, the inside of the belt-shaped main body, which is made of an elastic material and is formed in an endless shape, is
In an elastic crawler track in which rows of reinforcing bodies are embedded at intervals in the longitudinal direction of the belt, and two rows of interlocking parts are formed between the reinforcing bodies in the longitudinal direction of the belt, the ends where the two rows of reinforcing bodies in the fabric direction face each other. The wall thickness of the nearby elastic material is increased by υ thicker than the wall thickness of the elastic material near the outer end of each reinforcing body. It is formed to be higher on the inner surface side opposite to the ground contact side, and is characterized in that a horizontal reinforcing body is embedded in the reinforcing part and the thickened part in a wrap-around manner.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIGS. 1 and 2 μ are embodiments of the present invention, and in the figures,
(1) v'i elastic crawler, consisting of a belt-shaped main body (2), a reinforcing body (3)
) (4), elongation inhibitor (51 ([31, etc.).

The band-shaped main body (2) is made of an elastic material and is formed into an endless shape, and there are metal reinforcing bodies +31 (4
1 are buried at intervals in the longitudinal direction of the band, and between the reinforcing bodies (3) and (4) in the longitudinal direction of the band, an engaging part (7) (81 is 2 A row is formed;
The occlusal portion (74 (81) is substantially an open window structure.

The elongation blocking bodies (5) ft31 are endless and are buried in the longitudinal direction of the band on both sides of the buried bottom of the reinforcement body +31 (4).

(91 is the center part of the elastic belly band, (It) tlll is both side parts of the elastic crawler track, and the thickness of the elastic material near the opposite ends of the two rows of reinforcing bodies in the cloth direction in the center part 191 + 31 (4) is designated by the symbol H1, and both side portions Q(1(
The thickness of the elastic material near the outer side of each reinforcement body +31 (4) in Ill is denoted by H2, Hl) H! Since the thickened part 02 is formed in the center due to the difference in wall thickness, most of the thickened part α2 is formed to be higher on the inner surface side opposite to the ground contact side. .

That is, as a means for forming the thickened portion 02, in this embodiment, the second
As shown in the figure, the thickened portions (2) are arranged in rows at the same pitch as the reinforcing body +31 (4) in the longitudinal direction of the band. According to this method, the winding resistance increases slightly, but since there is no unevenness on the inner surface of the central part (91) and the surface is flat, it improves soil removal performance and prevents soil adhesion. It is advantageous in this respect.

Furthermore, it is possible that the thickened part (j force is formed on the contact surface side where the lug (+3) is formed, but according to this, the A thick surface elongation causes cracks, and the height of the lug (13) is at least lower at the portion where the wall thickness difference () (1-H2) exists. in(
Most of the thickened portion O2 is formed on the side opposite to the ground contact surface.

Thereby, since the reinforcing effect of the elastic material is several times stronger than that of elongation and compression, it is significant to form the thickened portion 0 on the side opposite to the contact surface.

Furthermore, Q41 is a horizontal reinforcing body made of metal plate U, bar material, hard resin plate material, Azusari, etc. In order to increase the rigidity of the boundary part of the reinforcing body +31' (4) at the center of the abdominal girdle, the above-mentioned material is used. It is embedded in the thickened part 0 in a wrap-around manner. In this case, in order to ensure sufficient elasticity between the reinforcing body ([41 and the above-mentioned reinforcing body +31 (4) parts (8, B) and (4B), and to ensure sufficient bonding force, As shown in the thickened part α2
A horizontal reinforcing body (141) is buried in the top side of the body, and its surface is covered with an elastic membrane α9. Also, as shown in FIG. It is desirable to form a concave groove α0 to prevent stress concentration between both ends and the protrusion (8AX41A) of the reinforcing body (31(4)).

Further, the horizontal reinforcing bodies α4) can be provided on the whole or all of the thickened portion α2, but they can also be provided alternately as shown in FIG.

Next, to explain the operation, the elastic crawler track (1) is endlessly wound around wheels such as a driving wheel, a driven wheel, and an idler wheel (not shown), and engaging claws are sequentially attached to the engaging part (7) (81). When engaged, they are rotated in p-circulation to form an endless traveling device (crawler).

Therefore, as shown in Fig. 8 (1) and (2), the stepped road surface (D)
In the conventional example, due to the weight of the aircraft acting on the wheel body (river), two rows of reinforcing bodies (B
) (C), the elastic crawler track is bent, the distance between the two rows of reinforcement protrusions becomes shorter, and the distance between the wheels (R) (N
Along with this dimensional difference, the inclination angle θ1 of the crawler track on the upper side of the step increases, causing wheel derailment. This leads to cracks in the elastic material.

On the other hand, in the embodiment of the present invention (-J), the thickened part (13) is formed in the middle part of the crawler to provide sufficient reinforcement, so that the crawler (1 ), there is almost no refraction, there is almost no dimensional difference between the guide protrusions (8A) (4A) and the distance between the wheels, and the angle of inclination θ is also small, thereby preventing wheels from coming off.

Furthermore, since the horizontal reinforcing body a41 is embedded in the thickened part a2 (it''C), MI folding at the central part is completely prevented, so that the horizontal reinforcing body 04 ) to eliminate bending, and since the elastic part is formed between the reinforcing bodies +31 (4) via the thickened part 02, no cracks will occur.

The present invention is as described above, and in short, in the present invention, two rows of reinforcing bodies +31 (4) in the band I+3 direction are arranged at intervals in the longitudinal direction of the band inside the band-shaped main body (2), which is made of an elastic material and formed in an endless shape. In the elastic crawler track (1) in which 81 is formed, two rows of reinforcing bodies in the belt longitudinal direction (31 (2 rows of interlocking parts (7) each between 4 gals) (2 rows of reinforcing bodies in the belt 11) are buried.
The wall thickness of the elastic material near the opposing ends of (4) is made thicker by υ than the inner thickness of the elastic material near the outer end of each of the reinforcing body +31 (4). Most of the thickened part (+2) is formed to be higher on the inner surface side opposite to the ground contact side, and furthermore, a horizontal reinforcing body α is embedded in the thickened part (2) in a wrapping manner. It has the following advantages.

The thickness of the elastic material near the ends where the reinforcement bodies (31 (4)) face each other is equal to the elasticity t, 4 F) of the reinforcement body + 31 (4) near the respective outer ends. Since the thickened part 02 is formed, even if the wheel 11 runs on a stepped road surface, bending from the center part is suppressed and wheel derailment can be prevented.

Moreover, the thickened part O9 is only formed in the central part of the so-called crawler track (1), and there is no thickening in both side parts 1 of the crawler track (1), resulting in a heavy ground contact or It is also possible to effectively release the load when driving on bumps or uneven terrain without causing a drop in pressure.

Furthermore, since the thickened part O2 is formed on the ash extraction ground side, the soil kicking force on the ground contact side is not damaged, and the traction force does not decrease, and the rigidity of the center part of the crawler track (1) is improved. can be made larger.

In addition, the thickened part OJK ld: Lateral reinforcement ([4 pieces are embedded in the shape, so the rigidity of the center part of the crawler track is low.)
, perfectly guaranteed, bending and deflection from the center of the chain (
Even if the horizontal reinforcement (14) is buried,
Cracks do not occur in the thickened portion 02.

Next, in FIG. 5, a cut sample with one pitch of growlers was placed on the support opening η, and the results of a rigidity test using an Amsler testing machine in which a load W was applied are shown in FIG.

In FIG. 7, ■ is the data of the conventional product, @ is the data of the crawler track (1) of the embodiment of the present invention shown in FIG. has been done.

As is clear from the data in FIG. 7, according to the present invention, the deflection of the elastic crawler track can be made smaller with respect to the load W, compared to the conventional example, and it is found to be effective in running on bumps.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional view, FIG. 2 is a partial perspective view, and FIGS. 8 (1) and (2) show deformation (refraction) of the conventional product and the present invention during running. FIG. 5 is a diagram of the rigidity test, FIG. 6 is a sectional view of the elastic track tested, and FIG. 7 is a graph of the test results. (1)... Elastic crawler track, (2)... Belt-shaped main body, (31
(4)... Reinforcement body, (7) (81... Occlusal part, 0
z...Thickened part, (141...Horizontal reinforcement body.

Claims (1)

[Claims] 1. An endless belt-shaped body made entirely of elastic material (2
) Two rows of reinforcing bodies + 31 (4) in the band longitudinal direction are buried inside the band at intervals in the longitudinal direction of the band.
31 (4) In the elastic crawler track (1) between which two rows of interlocking parts (7) (81 are formed, respectively), the elastic material near the end where two rows of reinforcing bodies (3) and (4) in the cloth direction face each other. The thickness of
Reinforcement body (3) (A thickened part made thicker than the wall thickness of the elastic material near the outer end of each of 41.
Most of the thickened part α2 is formed to be higher on the inner surface side opposite to the ground contact side, and further, the thickened part Q21C horizontal reinforcement body α4) is buried in an enveloping manner. Elastic tracks for crawlers.