JPH05278646A - Crawler belt with rubber pad - Google Patents

Abstract

PURPOSE:To provide a crawler belt with rubber pads which can easily attach and detach the rubber pad to an iron grouser and to inhibit the rubber pad to be unexpectedly detached while the vehicle is running. CONSTITUTION:In a belt provided with a plurality of track links 10 constituting a belt body, an iron grouser 1 attached to the outer peripheral surface of each track link by a bolt 31 through a first bolt through hole 1B and a rubber pad 20 which is attached to the iron grouser 1 and directly contacted to the ground, a recessed section 22A and a second bolt through hole 22B are formed in the grounding face 22 of the rubber pad 20, and the bottom face of the recessed section 22A is provided with a washer 24 on which the clamping face of a bolt 31 abuts. The rubber pad is threadedly secured to the track links 10 by the bolts 31 penetrating through the first and second bolt through holes 1B and 22A with the iron grouser 1 held between the track link 10 and itself, and the heads of the bolts 31 are housed in the recessed sections 22A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler belt used in a construction machine such as a hydraulic excavator, and more particularly to one having a rubber pad for preventing road surface damage attached to the surface of an iron grouser.

[0002]

2. Description of the Related Art FIG. 5 (a) is an exploded perspective view showing a part of a conventional crawler belt used for a crawler type hydraulic excavator, for example.
FIG. 5B is a partial sectional view thereof. In FIG. 5, an iron grouser 1 having a pair of grooves 1A on its surface is attached to the outer peripheral surface of a track link (not shown) constituting the crawler belt main body with bolts through the bolt through holes 1B. Reference numeral 2 is a rubber pad, and the rubber pad 2 is attached to the surface of the iron grouser 1 by means of bolts 4 via attachment fittings 3 arranged at both ends of the iron grouser 1 as shown. By mounting the rubber pad 2 on the surface of the iron grouser 1 in this way, the rubber pad 2 comes into direct contact with the road surface, and the iron grouser 1 does not contact the road surface, so damage to the road surface is prevented.

[0003]

However, in the structure of FIG. 5 described above, since the mounting bracket 3 is located at the end of the rubber pad 2, the mounting bracket 3 comes into contact with surrounding objects and is damaged during traveling. However, the rubber pad 2 may come off. Therefore, for example, as shown in FIG. 6, it is known that a rubber pad 2 ′ is pre-baked on the surface of the iron grouser 1 and the iron grouser 1 having the rubber pad 2 ′ baked is attached to a track link with a bolt. ing. According to this, the rubber pad 2'is not easily removed. 2A is a bolt through hole 1B of the iron grouser 1.
Is a through hole that communicates with, and bolts are attached through this hole 2A. However, when the rubber pad 2 ′ is baked in this way, the rubber pad 2 ′ cannot be removed from the iron grouser 1, so when replacing the worn rubber pad 2 ′ with a new one, for example, the iron grouser 1
Each must be replaced, which increases costs.

An object of the present invention is to provide a crawler belt with a rubber pad, which can be easily attached to and detached from the iron grouser and which prevents the rubber pad from being undesirably removed during traveling of the vehicle.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to FIG. 1 showing an embodiment. In the present invention, a plurality of track links 10 which are annularly connected to each other to form a crawler belt body and a first bolt through hole. 1B is bored, and this first bolt through hole 1
Bolts 31 to the outer peripheral surface of each track link 10 via B.
Iron grousers 1 attached by means of rubber pads 2 attached to the surface of each iron grouser 1 and grounded directly to the ground
Applies to tracks with 0 and. And the said problem is solved by the following structures. That is, the rubber pad 20
The ground surface 22 is provided with a recess 22A at a position corresponding to the first bolt through hole 1B.
The second bolt through hole 2 from the bottom surface of A to the mounting surface 21
2B is formed, and a washer 24 with which the tightening surface of the bolt 31 abuts is provided on the bottom surface of the recess 22A.
Is screwed to the track link 10 with the iron grouser 1 sandwiched between the bolt 31 and the track link 10 by the bolt 31 penetrating the first and second bolt through holes 1B and 22A. The head is housed in the recess 22A.

[0006]

According to the above structure, the rubber pad 20 can be attached to the track link 10 together with the iron grouser 1 without using a conventional mounting bracket, so that the rubber pad 20 can be prevented from coming off during traveling. Also, the bolt 31
Since the rubber pad 20 can be easily removed from the iron grouser 1 by removing, the rubber pad 20 can be easily replaced without replacing the iron grouser 1.

Incidentally, in the section of means and action for solving the above-mentioned problems for explaining the constitution of the present invention, the drawings of the embodiments are used to make the present invention easy to understand. It is not limited to.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. 2 is a sectional view showing a part of a crawler belt with a rubber pad according to the present invention, FIG. 3 is a sectional view taken along the line III-III, and FIG. 1 is FIG.
It is sectional drawing which expands and shows a part of. 10 is pin 5
1 is a plurality of track links connected in an annular shape via 1, and the plurality of track links 10 form a crawler belt main body. As shown in FIG. 3, a total of four through holes 10A of each pair are formed in the pair of connecting members 11 and 12 constituting each track link 10. Reference numeral 1 denotes an iron grouser which is arranged so as to extend in a direction orthogonal to the paper surface of FIG. 2. A pair of grooves 1A are formed on the surface of the iron grouser 1 as shown in FIG. 1A includes four bolt through holes (first bolt through holes) 1B at positions corresponding to the through holes 10A of the connecting members 11 and 12.
Are formed.

Reference numeral 20 is a rubber pad having a length substantially the same as that of the iron grouser 1, and a mounting surface 21 thereof has a pair of protrusions 21A which are fitted into the pair of grooves 1A of the iron grouser 1.
(FIG. 1) is provided. On the other hand, on the ground surface 22 of the rubber pad 20, as shown in the perspective view of FIG. 4, four recesses 22A are formed at the positions corresponding to the respective bolt through holes 1B of the iron grouser 1, and these recesses 22A are formed. A bolt through hole (second bolt through hole) 22B is formed coaxially with the recess 22A from the bottom surface to the mounting surface 21.
A metal cylindrical member 23 is fitted in the bolt through hole 22B. A washer 24 is embedded in the rubber pad 20. A part of the washer 24 is closely attached to the bottom surface of the recess 22A, and the contact portion has the recess 22A and the through hole 22B.
And a hole communicating with and is formed.

Next, a procedure for mounting the iron grouser 1 and the rubber pad 20 on the track link 10 will be described. First, the iron grouser 1 is attached to the outer peripheral surface of the track link 10.
And the rubber pad 20 is placed in this order. At this time,
The pair of protrusions 21A of the rubber crawler 20 are fitted in the pair of grooves 1A of the iron grouser 1. Then, the through holes 22B, 1B and 10A of the rubber pad 20, the iron grouser 1 and the track link 10 are aligned so as to be coaxial with each other, and in this state, the through holes 22B, 1B and 10A are aligned.
Insert the bolt 31 into the through hole 1 of the track link 10.
As shown in FIG. 1, a nut 32 is screwed and fastened to the tip of the bolt protruding from 0A from below. At this time, the head of the bolt 31 is housed in the recess 22A, and the tightening surface thereof abuts the washer 24 and the upper end surface of the cylindrical member 23, and is located in the through hole 22B of the bolt 31. Is covered with the cylindrical member 23. That is, the bolt 31 and the rubber pad 20 are not in contact with each other.

According to the above procedure, the rubber pad 20 and the iron grouser 1 are connected to the track link 1 with the iron grouser 1 sandwiched between the rubber pad 20 and the track link 10.
The surface of the iron grouser 1 is fixed to 0, and the entire surface of the iron grouser 1 is covered with the rubber pad 20. According to this, the rubber pad 20 can be mounted without using the mounting bracket 3 as shown in FIG. 5, so that the rubber pad 20 does not come off undesirably during traveling. Further, since the rubber pad 20 and the iron grouser 1 can be separated by removing the bolt 31, it is possible to replace only the rubber pad 20 with a new one without replacing the iron grouser 1 when the rubber pad 20 is worn, for example. Moreover, the replacement work can be easily performed. Further, since the head of the bolt 31 is housed in the recess 22A of the rubber pad 20, the head of the bolt does not come into contact with the road surface and damage the road surface during traveling. Further, since the washer 24 is provided in the rubber pad 20, the tightening force of the bolt 31 can be received in a wide range, and the damage of the rubber pad 20 due to the bolt fastening can be suppressed to the minimum. Further, since the metal cylindrical member 23 is fitted in the through hole 22B of the rubber pad 20, the threaded portion of the bolt 31 does not damage the wall surface of the through hole 22.

The structure of the track link 10 and the shapes of the iron grouser 1 and the rubber pad 20 are not limited to those in the embodiment. Instead of using the nut 32, the iron grouser 1 and the rubber pad 20 may be attached by screwing the tip of the bolt 31 into a screw hole formed in the track link. Further, the present invention can be applied to construction machines other than hydraulic excavators, for example, crawler tracks used for crawler cranes.

[0013]

According to the present invention, a bolt is passed through a through hole provided from the grounding surface of the rubber pad to the mounting surface and a through hole of the iron grouser, and the rubber pad and the iron grouser are both used as a track link by this bolt. Since it is screwed, the rubber pad can be mounted without using a conventional mounting bracket, and the rubber pad can be prevented from being undesirably detached during traveling. Also, the rubber pad can be easily removed from the iron grouser by removing the bolts.
As a result, it is possible to easily replace only the rubber pad without replacing the iron grouser, so that the cost can be reduced as compared with the conventional case where the entire iron grouser is replaced. Further, since the head of the bolt is housed in the recess of the rubber pad, the head of the bolt does not come into contact with the road surface during traveling, and the road surface is not damaged by the bolt. Furthermore, since a washer is provided on the tightening surface of the bolt,
A wide range of bolt tightening force can be received, and the durability of the rubber pad can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of a crawler belt with a rubber pad according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a crawler belt with a rubber pad.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a diagram showing a configuration of a rubber pad.

FIG. 5 is a view showing a conventional example of a crawler belt with a rubber pad,
(A) is an exploded perspective view and (b) is a sectional view.

FIG. 6 is a perspective view showing another conventional example.

[Explanation of symbols]

 1 Iron Grocer 1A Groove 1B First Bolt Through Hole 10 Track Link 10A Bolt Through Hole 20 Rubber Pad 21 Mounting Surface 21A Projection 22 Ground Surface 22A Recess 22B Second Bolt Through Hole 23 Cylindrical Member 24 Washer 31 Bolt 32 Nut 32

Claims (1)

[Claims] 1. A plurality of track links which are annularly connected to each other to form a crawler belt main body and a first bolt through hole are formed, and an outer peripheral surface of each of the track links is provided through the first bolt through hole. A crawler track equipped with iron grousers attached by bolts, and rubber pads attached to the surface of each iron grouser and directly grounded to the ground, wherein the ground surface of the rubber pad corresponds to the first bolt through hole. A recess is provided at a location, a second bolt through hole is formed from the bottom surface of the recess to the mounting surface, and a washer with which the tightening surface of the bolt abuts is provided on the bottom surface of the recess. Is screwed to the track link with the iron grouser sandwiched between the track link and the track link by a bolt penetrating the first and second bolt through holes, The head of the serial bolt rubber pad with track, characterized in that housed in the recess.