JP2001170876A - Dust protective mechanism for breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a shock absorbing device for improving durability of a breaker by preventing invasion of dust, water, sand, etc., into a bracket. SOLUTION: In a hydraulic breaker 1 in which a breaker body 2 is held by a bracket 3, a rod cover 10 is provided on a tip part of the bracket 3, a dust ring 12 is installed between the breaker body 2 and the rod cover 10, and an injection hole 13 for filling foam urethane resin is provided inside the rod cover 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dustproof mechanism for a breaker used in an environment where there is a lot of dust, water, earth and sand, such as in tunnel excavation.

[0002]

2. Description of the Related Art Breakers used in harsh environments with a lot of dust, water, earth and sand, such as tunnel excavations, are conventionally provided with:
A dustproof mechanism is provided to prevent dust, water, earth and sand from entering the breaker body. In this breaker, a breaker body is held by a bracket, and the bracket is attached to an arm of a construction vehicle.
When performing crushing work, the rod inserted into the tip of the breaker body is pressed against the object to be crushed, and the rod is hit with a piston built in the breaker body, thereby crushing the object to be crushed. . At this time, the breaker generates severe vibration and noise.

Therefore, in order to minimize such vibration and noise and improve the working environment, a low-vibration and low-noise breaker having a shock absorber provided between a breaker body and a bracket is used in a tunnel. It is becoming.

[0004]

However, the conventional breaker is provided with a dustproof mechanism for preventing dust, water, earth and sand from entering the breaker body.
Since it was not possible to prevent dust, water, earth and sand from entering the bracket, the buffering effect of the shock absorber was reduced due to the dust, water, earth and sand that entered, and the bracket could not be held, making it durable. There was a problem that the property deteriorated.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problem in a breaker, and prevents breakage of dust, water, earth and sand in a bracket, protects a shock absorber, and improves the durability of the breaker. It is an object of the present invention to provide a dustproof mechanism.

[0006]

In order to solve the above-mentioned problems, a dust cover mechanism for a breaker according to the present invention, in which a rod cover is provided at a tip end of a bracket in a breaker for holding a breaker body with a bracket, comprises a breaker body and a rod cover. A dust ring is attached between them. In the dustproof mechanism of this breaker, a dust ring mounted between the breaker body and the rod cover prevents dust, water, earth and sand from entering the rod cover, and the breaker can be used to remove dust, water, earth and sand from tunnel excavation and the like. Even when the shock absorber is used in an environment where there are many shocks, the shock absorber is protected so that the shock absorbing effect is not deteriorated, and the durability is improved.

Further, in the case of a tunnel breaker provided with a dustproof mechanism in the breaker body, dust and water entering the inside of the breaker body are formed by the dust ring mounted between the breaker body and the rod cover and the dustproof mechanism of the breaker body. In addition, dust and dirt are prevented from entering, so that the dustproof performance inside the breaker body becomes extremely high. Also, if an injection hole for filling the urethane foam resin is provided in the rod cover, the dust cover can be further enhanced by filling the urethane foam resin into the dust cover from the injection hole as needed. .

[0008]

1 is a front view of a hydraulic breaker having a dustproof mechanism according to an embodiment of the present invention, FIG. 2 is a side view of the hydraulic breaker, FIG. 3 is a bottom view of the hydraulic breaker, and FIG.
FIG. 4 is an enlarged vertical sectional view of a tip portion of a bracket showing a configuration of a dustproof mechanism. The hydraulic breaker 1 is a hydraulic breaker body 2
Is held by a bracket 3, and the bracket 3 is attached to an arm of a construction vehicle. Between the hydraulic breaker body 2 and the bracket 3, a cushioning material 4 for suppressing vibration and noise is provided. Hydraulic breaker body 2
The rod 5 is inserted at the tip of the.

At the tip of the front head 6 of the hydraulic breaker body 2, a rod bearing 8 for slidably holding the shank portion 7 of the rod 5 is provided. 2 is provided with a dust ring 9 for preventing dust, water, earth and sand from entering the inside. A rod cover 10 that surrounds the rod 5 and covers the distal end of the rod bearing 8 is attached to the distal end of the bracket 3 with mounting bolts 11, and a rod cover 10 is provided between the rod bearing 8 and the rod cover 10. Dust inside,
A dust ring 12 for preventing intrusion of water, earth and sand, and the like is mounted. The rod cover 10 can be formed integrally with the bracket 3.

The rod cover 10 includes a rod cover 10.
An injection hole 13 for filling the inside with a urethane foam resin is formed. The injection hole 13 is always closed by the cap 14, and the urethane foam resin can be filled in the rod cover 10 by removing the cap 14 as necessary. When performing the crushing operation, the rod 5 is pressed against the object to be crushed, and the rod 5 is hit with a piston built in the hydraulic breaker body 2 to crush the object to be crushed. At this time, the cushioning material 4 reduces vibration and noise of the hydraulic breaker 1.

In the dustproof mechanism of the hydraulic breaker 1, the dust ring 12 mounted between the rod bearing 8 and the rod cover 10 prevents dust, water, earth and sand from entering the rod cover 10, so that the hydraulic breaker Even when the device 1 is used in an environment with a lot of dust, water, earth and sand such as a tunnel excavation, etc., the cushioning material 4 can be protected so that the buffering effect does not decrease, and the durability can be improved.

The dust ring 12 mounted between the rod bearing 8 and the rod cover 10 and the dust ring 9 mounted on the tip of the rod bearing 8 allow dust, water, earth and sand to enter the inside of the hydraulic breaker body 2. Therefore, dust prevention performance inside the hydraulic breaker main body 2 is extremely high. Further, by filling the dust cover 10 with the urethane foam resin from the injection hole 13 as needed, the dustproof performance can be further enhanced.

A bracket for a low-noise, low-vibration breaker used in ordinary civil engineering work not used for tunnels can be used for tunnels if the rod cover 10 is provided. This eliminates the need to do so and increases productivity.

[0014]

As described above, the dustproof mechanism of the hydraulic breaker according to the present invention prevents the entry of dust, water, earth and sand into the bracket, protects the shock absorber, and improves the durability of the breaker. Can be done. Also, if an injection hole for filling the urethane foam resin is provided in the rod cover, the dust cover can be further enhanced by filling the urethane foam resin into the dust cover from the injection hole as needed. .

[Brief description of the drawings]

FIG. 1 is a front view of a hydraulic breaker having a dustproof mechanism according to an embodiment of the present invention.

FIG. 2 is a side view of the hydraulic breaker.

FIG. 3 is a bottom view of the hydraulic breaker.

FIG. 4 is an enlarged vertical sectional view of a tip portion of a bracket showing a configuration of a dustproof mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hydraulic breaker 2 Hydraulic breaker main body 3 Bracket 4 Buffer material 5 Rod 6 Front head 7 Shank part 8 Rod bearing 9 Dust ring 10 Rod cover 11 Mounting bolt 12 Dust ring 13 Injection hole 14 Cap

Claims (2)

[Claims] 1. A dustproof mechanism for a breaker, comprising: a breaker for holding a breaker body by a bracket, wherein a rod cover is provided at a tip end of the bracket, and a dust ring is mounted between the breaker body and the rod cover. 2. An injection hole for filling a urethane foam resin in a rod cover.
The dustproof mechanism of the hydraulic breaker described.