JP3048882U - Track pad - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To minimize damage to a corner portion of an elastic member. SOLUTION: A reinforcing member of a crawler belt pad including a reinforcing member formed in a shape along a tread surface of a crawler plate, an elastic member fixed on the reinforcing member to form a tread surface, and a mounting member to a crawler plate. A protector for protecting the base of the elastic member was provided near both ends.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to the structure of a track pad used in a tracked vehicle.

[0002]

[Prior art]

 In most cases, the structure of the conventional crawler belt pad is composed of a reinforcing member adapted to the tread surface of the crawler and an elastic member on the reinforcing member. As shown in FIG. 9, the crawler belt pad S is of a type in which a reinforcing member 52 is provided on the entire bottom surface of the elastic member 50. The reinforcing member 52 has a cross section in close contact with a tread surface having a central lug of a crawler plate. It is substantially W-shaped and has two valley bottoms. The elastic member 50 is formed of a vertical surface 53 at the end, an inclined surface 54, an inclined surface 56 at the side, and a substantially flat tread 55 with respect to the reinforcing member 52. (See, for example, Japanese Utility Model Laid-Open No. 7-37873)

[0003]

[Problems to be solved by the invention]

 However, the crawler belt pad S in which the reinforcing member is formed in a shape along the tread surface of the crawler plate, when used at a civil engineering work site, the exposed elastic member on the end side is likely to hit the curb, etc. At the end, there is a bolt attached to the link, etc., so the amount of elastic material is smaller than the other parts, so sufficient elasticity cannot be obtained, and the corners near both ends are finer than the other due to the load. There was a drawback of doing it.

[0004] Moreover, if mud, gravel, or the like penetrates into the chipped portion, the chip is further chipped from one to the next, which affects the whole, making the elastic member brittle and having a rough surface, resulting in poor appearance. There is a problem that the driving performance is affected.

The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a crawler belt pad in which corner portions of an elastic member are eliminated as little as possible. It is assumed that.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the crawler belt pad of the present invention includes an elastic member formed in a shape following the tread surface of the crawler plate, an elastic member fixed on the reinforcing member to form a tread surface, and both ends of the reinforcing member. Thus, in a crawler belt pad comprising bolt or hook attachment means for attaching to a crawler board, a protector for protecting the base of the elastic member is provided near both ends in the longitudinal direction of the reinforcing member.

[0007] A protector is provided to protect the base of the elastic member by tilting the base at the longitudinal end of the elastic member and tilting the base in the same plane as the inclined surface.

[0008] The protector is provided on the side surface in the width direction at the end of the reinforcing member.

When an external force such as mud or gravel is applied to the base of the corner of the elastic member, the protector protects the base of the elastic member.

[0010] Since the corner of the elastic member is inclined inward, a large surface pressure is not applied locally at the corner, and a stress dispersion effect is produced.

[0011]

[Embodiment of the invention]

 Embodiments of the invention will be described below based on examples with reference to the drawings. A first embodiment of the present invention will be described with reference to FIGS. The crawler belt pad A of the present invention is of a type that is attached to the crawler board with bolts protruding from the tread side of the crawler board on the lower surface of the reinforcing member. Reference numeral 1 denotes a reinforcing member formed in a substantially W-shaped cross section along the tread surface of the shoe plate having a central lug. Numeral 2 is a rubber pad having a shape in which a lower portion matches the upper surface of the reinforcing member 1 and an upper surface is a rubber pad which is an elastic member formed with a tread surface. It is formed of an inclined surface 2d and an upper surface 2a forming a tread surface. Reference numeral 2e denotes a lower base portion of the rubber pad 2 exposed from the reinforcing member 1. This rubber pad requires rigidity in the center area where the load is applied to the link mounting part, but it has a longer length than the center area (link mounting part) to reduce the load on both ends. Both ends in the hand direction have a narrow width, and the side inclined surface 2d is also gradually changed. Reference numeral 3 denotes a bolt which is a mounting member which protrudes from the through hole of the reinforcing member to the rear surface side, is inserted into the through hole of the crawler plate, and is fitted with a crawler belt pad. 5 is a protector fixed to both ends of the reinforcing member by welding. The protector is formed integrally with the vertical surface portion 5a, the inclined surface portion 5b, and the side surface portion 5c bent in an L shape, and the lower end of the vertical surface portion 5a and the lower end of the side surface portion 5c are fixed to the reinforcing member 1 by welding. . The notch 5f in the concave portion of the vertical surface portion 5a is formed to engage with the center lug of the crawler. The purpose of forming the slope is to eliminate the corners and prevent the corners from being directly loaded by mud and gravel. The rubber pad 2 is integrally formed with the reinforcing member 1 by vulcanization. In this example, the slope of the protector 5 is formed on the same plane as the slope of the rubber pad, but may be different from each other.

As shown in FIG. 2, the crawler belt pad A is such that a protector 5 formed in advance by a press die or the like is aligned with both ends in the longitudinal direction of the reinforcing member, and the respective end faces in contact with the substantially W shape are welded. The reinforcing member 1 to which the protector 5 and the bolt 3 are fixed is set in a molding die, a plurality of unvulcanized rubber pieces are placed thereon, hot-pressed, and the rubber pieces are vulcanized and bonded to the reinforcing member 1 and the reinforcing portion 5. It is integrally molded to complete crawler pad A.

FIGS. 5 and 6 show a crawler belt pad B according to a second embodiment of the present invention. This crawler belt pad B is of a type in which a hook is provided at an end of a reinforcing member, hooked on an end of a crawler, and attached to the crawler. FIG. 5 shows a fixed hook, and FIG. . In FIG. 5, reference numeral 11 denotes a reinforcing member formed in a substantially W-shaped cross section along a tread surface of a shoe plate having a central lug. Numeral 12 is a rubber pad which is a resilient member having a lower portion having a shape matching the upper surface of the reinforcing member and an upper surface forming a tread surface. Reference numeral 14 denotes a U-shaped hook fixed to the end of the reinforcing member. Reference numeral 15 denotes a protector that protects the base 12e of the rubber pad fixed to the end of the reinforcing member by welding. The protector is formed integrally with the vertical surface portion 15a, the inclined surface portion 15b, and the side portion 15c bent in an L-shape. The notch 15f of the concave portion of the vertical surface portion 15a is used to engage with the central lug of the shoe. It is formed. In the protector 15, the lower end of the vertical surface portion 15a and the lower end of the side surface portion 15c are fixed to the upper surface of the reinforcing member 11 and the upper surface of the hook 14 by welding.

Reference numeral 25 denotes a protector provided on the detachable hook 24 side. The protector 25 is formed by a flat portion 25d, an inclined surface portion 25b having a free end, and a side surface portion 25c bent in an L shape. The hook 24 has a U-shape and is provided with an engaging hole 24f for engaging with the center lug end of the crawler board and a bolt hole 24h. Reference numeral 26 denotes a receiving seat for fixing the attaching / detaching hook 24, which is fixed to the end of the reinforcing member 1. The receiving seat 26 forms a hole 26h for a bolt for fixing the notch 26f into which the central lug of the crawler plate is inserted and engaged and the detachable hook 24. The nut 27 is welded to the back surface of the receiving seat 26. In the protector 25, each end of the flat surface portion 25 d and the side surface portion 25 c is fixed to the receiving seat 26 and the reinforcing member 11 by welding.

FIG. 7 is a crawler belt pad C according to a third embodiment of the present invention. The crawler belt pad C is of a type that is mounted on a crawler plate without a central lug, hooked on both longitudinal ends of the crawler plate, and mounted on the crawler plate. Reference numeral 31 denotes a reinforcing member having a U-shaped cross section opened on the upper surface on the pad side. Reference numeral 35 denotes one fixed hook, which is fixed to one end of the reinforcing member 31 and protects a slope protector 35b for protecting the base 32e of the rubber pad 32. It is a fixed hook integrally formed. Reference numeral 38 denotes a fixing portion having the inclined surface protector 35b which is fixed to the other end of the reinforcing member 31 and protects the base portion 32e of the rubber pad 32, on the other detachable hook side. A nut 37 is welded to the back surface. The crawler belt pad C can be attached to the crawler board by the L-shaped hook 39 via the bolt 36 on the fixing portion 38. The hook 39 may be omitted from the hook and the same U-shape as the hook 24 of the second embodiment may be used.

FIG. 8 shows a track pad D according to a fourth embodiment of the present invention. The protector 45 is fixed to the side surface in the width direction on the end side of the reinforcing member 41 by welding. Reference numeral 42 denotes a rubber pad. In this example, not provided at both ends of the reinforcing member 41, but provided at both sides so as to protect the base 42e of the rubber pad 42 at both ends. The other structure is the same as that of the above-described embodiment, and is omitted.

In each of the above embodiments, the rubber and the pad are the same as in the first embodiment. The reinforcing member is placed on a hot press mold, unfoamed rubber and small pieces are placed, and hot press molding is performed. Build up. The protector is not only welded to the pressed metal plate, but may be made of a casting integrally with the reinforcing member. In this case, the elastic member is vulcanized and bonded to the casting. Also, the protectors in each embodiment are not necessarily a pair. Either combination may be used. For example, a combination of the protector 5 of the first embodiment and the protector 45 of the fourth embodiment may be used.

Since the protectors are integrally formed at the ends and side portions near both ends of the reinforcing member, the rigidity of the corner portion is improved, and the protection of the elastic member at the base portion enables external force such as mud and gravel from the road surface to be removed. Even if the elastic member is applied, the protector protects the external force, and since the elastic member is inclined, a stress dispersing action can be obtained, and the elastic member is prevented from dropping.

In all of the above, the protector is described as protecting the base of the rubber pad, but it is not merely a cover for the rubber pad. Rather, it may be more appropriate to talk about reinforcing the base of the rubber pad. In any case, the described protector also has the function of a reinforcing member.

[0020]

[Effect of the invention]

 Since the present invention has the above configuration, the following effects are obtained.

In any case, since the protector is provided at the corner of the elastic member which easily hits the road surface, external force from the road surface side to the corner of the elastic member is suppressed as much as possible, and the lack of the corner portion of the elastic member is suppressed. I can do it.

In addition, since the end of the rubber pad is inclined and the protector is also inclined, even when an external force is applied, a stress dispersing action works, and it is possible to effectively suppress the lack of the corner portion of the elastic member. .

Since both ends in the longitudinal direction of the rubber pad are formed thinner with respect to the central portion, the rubber pad can be made thinner and lighter.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a crawler belt pad of a first embodiment.

FIG. 2 is an overall perspective view of the protector of FIG.

FIG. 3 is a partial side view of FIG. 1;

FIG. 4 is a partial plan view of FIG. 1;

FIG. 5 is a partial perspective view showing a fixed hook side protector of the crawler belt pad of the second embodiment.

FIG. 6 is a partial perspective view showing a protector on a detachable hook side of a crawler belt pad of a second embodiment.

FIG. 7 is an overall side view showing a reinforcing member and a protector of the crawler belt pad of the third embodiment.

FIG. 8 is a partial perspective view showing a reinforcing member and a protector of the crawler belt pad of the fourth embodiment.

FIG. 9 is an overall perspective view showing a conventional crawler belt pad.

[Explanation of symbols]

 A, B, C, D Track pad 212, 32, 42 Elastic member (rubber pad) 2c, 12e, 32e, 42e Base 5, 15, 25, 35, 45 Protector 5a, 15a, 25a Vertical surface 5b, 15b, 25b, 35b, 38b Inclined surface 5c, 15c, 25c, 45 Side

Claims (3)

[Utility model registration claims] 1. A reinforcing member formed in a shape along a tread surface of a tread board, an elastic member fixed on the reinforcing member to form a tread surface, and bolts or hooks for attaching to the tread plate at both ends of the reinforcing member The crawler pad according to claim 1, wherein a protector for protecting the base of the elastic member is provided near both ends in the longitudinal direction of the reinforcing member. 2. A reinforcing member formed in a shape along a tread surface of a shoe, an elastic member fixed on the reinforcing member to form a tread, and bolts or hooks for attaching to the shoe at both ends of the reinforcing member. In the crawler belt pad comprising the attaching means, the base in the longitudinal direction of the elastic member is inclined,
A crawler belt pad provided with a protector that is inclined on the same plane as the inclined surface to protect a base of the elastic member. 3. The protection device according to claim 1, wherein the protector is provided on a side surface in a width direction of an end portion of the reinforcing member.
Crawler pad as described.