JPH0581351U - Anti-vibration bracket for hydraulic breaker - Google Patents

Abstract

(57) [Summary] [Structure] There are two bracket plates 4 that hold the hydraulic breaker.
It is formed as a damping steel plate having at least one steel plate 8 having a plate thickness of 6 mm or more and a viscoelastic body 9 sandwiched between adjacent steel plates 8. [Effect] Vibration and impact energy from the hydraulic breaker are reduced by the viscoelastic body located in the middle of the bracket plate, vibration and noise are significantly reduced, and the environment at the work site can be improved. Since the bracket plate 4 is composed of two or more steel plates having a plate thickness of 6 mm or more, it is possible to sufficiently withstand severe loads and vibrations.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an anti-vibration bracket which is attached to a trolley such as a power shovel and supports a hydraulic breaker used for crushing concrete, rocks and the like.

[0002]

[Prior Art]

 Conventional hydraulic breakers are used by being mounted on a trolley via a bracket, for example, on a power shovel. The bracket is formed as a welded structure of steel plates due to repeated severe loads and stresses.

When a tool such as a chisel of a hydraulic breaker is crushed by hitting rock, concrete or the like, the steel plate of the bracket is vibrated by the vibration and impact of the hydraulic breaker, which may cause resonance. Therefore, the vibration of the bracket is a major source of noise during the crushing work by the hydraulic breaker. In order to reduce noise during crushing work with a hydraulic breaker, various methods have been proposed for mounting the hydraulic breaker on the bracket via an elastic body such as rubber so that vibration and impact of the hydraulic breaker are not transmitted to the bracket. However, there are problems that the structure becomes complicated, maintenance and inspection becomes difficult, and reliability and durability remain uncertain.

[0004]

[Problems to be solved by the device]

 SUMMARY OF THE INVENTION It is an object of the present invention to provide a vibration isolator bracket for a hydraulic breaker having a simple structure that can solve the above-mentioned conventional problems and reduce vibration and noise.

[0005]

[Means for Solving the Problems]

 The present invention solves the above problem by providing a vibration-breaker bracket for a hydraulic breaker, which has a pair of bracket plates that can hold a hydraulic breaker and can be connected to a trolley. A vibration-damping bracket for a hydraulic breaker, which is formed as a vibration-damping steel plate having a viscoelastic body sandwiched between adjacent steel plates, has been solved.

[0006]

[Action]

 According to the present invention, even if vibration or shock is generated by the hydraulic breaker during the crushing work, the pair of bracket plates forming the anti-vibration bracket that supports the hydraulic breaker is formed by the damping steel plates. Since it is damped by the damping steel plate, the vibration and impact transmitted to the truck can be greatly reduced. Since the thickness of the damping steel plate is 6 mm or more, it is possible to withstand severe loads and vibrations. Furthermore, the mounting structure is simple, and it has excellent reliability and durability.

[0007]

【Example】

 The details of the present invention will be described based on an embodiment shown in the drawings.

1 to 4, a hydraulic breaker 1 is connected to a carriage 3, for example, a power shovel, through a vibration breaker bracket 2 for the hydraulic breaker.

The vibration breaker bracket 2 for the hydraulic breaker has a pair of bracket plates 4 that sandwich the left and right side surfaces of the hydraulic breaker 1. The bracket plate 4 is fixed to the hydraulic breaker 1 by means of a first bolt / nut 5 which penetrates the hydraulic breaker 1 at two lower parts and one upper part. Therefore, the hydraulic breaker 1 and the bracket plate 4 act as an integral member, and the strength as a whole is enhanced. In addition, the bracket plates 4 are also directly fixed to each other by the second bolts and nuts 6 to enhance the rigidity of the whole.

The bracket plate 4 is formed with a connecting hole 7 for inserting a connecting pin for connecting to the dolly 3, for example, a power shovel.

As the bracket plate 4, as shown in FIG. 5, a vibration-damping steel plate formed by two steel plates 8 having the same thickness and a viscoelastic body 9 bonded between them is used. The viscoelastic body 9 is formed by curing a thermosetting viscoelastic resin having a strong adhesive force at a low temperature under a high pressure.

As a modification of the example of FIG. 5, the bracket plate 4 uses two steel plates 8 ′ and 8 ″ having different thicknesses to secure rigidity, as shown in FIG. It is also possible to adopt a structure in which the viscoelastic body 9 is bonded between them.

Further, as shown in FIG. 7, it may be constituted by three steel plates 8 and a viscoelastic body 9 provided between the steel plates 8 for the purpose of increasing the damping effect. The number of steel plates 8 is not limited to three, and an appropriate number of steel plates can be provided, and the thickness of the steel plates is not limited to the same.

The thickness of the vibration-damping steel plate is preferably 6 mm or more in order to withstand the severe load and vibration of the hydraulic breaker. For that purpose, a viscoelastic body having a strengthened adhesive force is used. There is a need.

Energy from vibration and impact transmitted from the hydraulic breaker when crushing rock, concrete, etc. is converted into thermal energy by internal friction due to deformation of the viscoelastic body existing in the middle of the damping steel plate, Damps vibration.

[0016]

[Effect of the device]

 According to the present invention, the vibration and impact transmitted from the hydraulic breaker when rocks, concrete, etc. are crushed are damped by the damping steel plate, and the noise generated by vibrating the bracket can be reduced, and the work environment and the work area The noise environment has also been improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a use state of an anti-vibration bracket for a hydraulic breaker according to the present invention.

FIG. 2 is a side view of an anti-vibration bracket for a hydraulic breaker according to the present invention.

FIG. 3 is a front view of an anti-vibration bracket for a hydraulic breaker according to the present invention.

FIG. 4 is a bottom view of an anti-vibration bracket for a hydraulic breaker according to the present invention.

FIG. 5 is a partial perspective view of a bracket plate.

FIG. 6 is a partial perspective view of another example of the bracket plate.

FIG. 7 is a partial perspective view of another example of the bracket plate.

[Explanation of symbols]

 1 hydraulic breaker 2 anti-vibration bracket 3 bogie 4 bracket plate 8 steel plate 9 viscoelastic body

Claims (4)

[Scope of utility model registration request] 1. An anti-vibration bracket for a hydraulic breaker, which has a pair of bracket plates that can hold a hydraulic breaker and can be connected to a trolley, wherein a viscoelastic body is sandwiched between steel plates having a bracket plate of 6 mm or more. Anti-vibration bracket for hydraulic breaker, which is made of vibration-damping steel plate. 2. The vibration-damping bracket for a hydraulic breaker according to claim 1, wherein the vibration-damping bracket is formed by bonding several steel plates with a viscoelastic body. 3. The vibration isolation bracket for a hydraulic breaker according to claim 1, wherein the vibration isolation bracket is formed by bonding steel plates having different thicknesses with a viscoelastic body. 4. The bracket plate is fixed to the hydraulic breaker by bolts penetrating the lower and upper portions of the hydraulic breaker, and the bracket plates are directly fixed to each other by bolts at appropriate positions. The vibration-proof bracket for a hydraulic breaker according to any one of 1 to 3.