JPH0723180Y2 - Vibration control device for impact tool - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control device for absorbing vibration during crushing work in a striking tool used for crushing work.

[0002]

2. Description of the Related Art In a conventional striking tool, vibration of the tool body is oscillated by a ring-shaped shock absorbing member screwed to the tool body by a screw means other than a screw means for connecting a pair of brackets holding the tool body. It was absorbed.

[0003]

The vibration absorbing mechanism described above has a problem that the damping effect is insufficient and the mechanism is complicated.
An object of the present invention is to simplify the mechanism and enhance the vibration damping effect.

[0004]

A damping device for a striking tool according to the present invention comprises a pair of brackets having a tool body clamped on the inner side surface thereof, of the two side surfaces of the tool body. A pair of pinching portions for pinching the pair of cushioning members elastically contacted with the pair of side surfaces perpendicular to the pair are respectively provided in opposition to each other, and the pinching portions of each pair include the pinching portions. The pressing surfaces that change the pressing direction of pressing the buffer member toward the tool body side are formed in an inclined shape.

[0005]

[Operation] When both brackets are fastened by the fastening means,
A pair of cushioning members sandwiched between a pair of clamping portions provided on the inner side surfaces of both brackets in a relative shape and elastically contacted with both side surfaces of the tool body are provided by the pair of clamping portions. As the pressure is applied, the pressing direction of each pair of the pressing portions presses the cushioning member is changed to the tool body side by the pressing surface formed on the pressing portion in an inclined shape, and each pair of the pressing members is pressed. The cushioning members are pressed against the tool body from both sides thereof.

[0006]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, the pair of clamping portions presses the cushioning member against each other by pressing the cushioning member against the tool body from both sides thereof.
The tool body can be firmly and elastically sandwiched by each pair of cushioning members, and the vibration of the tool body can be effectively absorbed by each pair of cushioning members to enhance the vibration damping effect.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. A tool main body 1 of an impact tool D for repeatedly hitting and crushing an object to be crushed is arranged in parallel with a gap and is attached in parallel to the tip of a boom of a hydraulic excavator. A piston (not shown), which is sandwiched between them and is reciprocally driven by hydraulic pressure, is inserted into the tool body 1, and a chisel 3 which is repeatedly hit by the piston is inserted and attached to the tip of the tool body 1. ing.

On the outer peripheral surface of the tool body 1, a pair of first side surfaces 1a, 1a perpendicular to the inner side surface 2a of the bracket 2 and a pair of second side surfaces 1b, parallel to the inner side surface 2a of the bracket 2,
1b are formed in parallel with each other.

On the inner side surfaces 2a of the two brackets 2, a proper number of pairs of projecting portions 4 are formed to face each other so as to hold the tool body 1, and both brackets 2 are formed.
On the inner side surface 2a, a pair of pinching portions 5 connected to the end portions of the protrusions 4 are formed so as to project in opposed relation to each other.

Between the pair of pressing portions 5 is a horizontally elongated buffer member 6 which is elastically deformable by an elastic material such as rubber and elastically contacted with the first both side surfaces 1a of the tool body 1. The brackets 2 are respectively sandwiched, and the brackets 2 are respectively inserted into the pinching portions 5 of each pair and the cushioning members 6 sandwiched between the pinching portions 5 of each pair, and the bolts 7. The tool body 1 is pressed and fastened in the approaching direction by the nuts 8 respectively screwed into the screw 7, and the tool body 1 is clamped between the paired protrusions 4 of the fastened brackets 2.

An elastic contact surface 6a is elastically in contact with the first side surface 1a of the main body 1 over one substantially side surface of each of the buffer members.
In addition, pressure-receiving surfaces 6c, 6c that are inclined outward from the side 6b opposite to the elastic contact surface 6a toward the elastic contact surface 6a are formed on both outer end surfaces of each cushioning member 6 symmetrically.

The outer end surface of each pressing portion 5 is substantially parallel to the pressure receiving surface 6c of the cushioning member 6 that is in contact with the outer end surface, and the pressing portion 5 moves away from the first side surface 1a of the tool body 1. The pressing surfaces 9 that are inclined so that the amount of protrusion gradually increases and are brought into close contact with the pressure receiving surfaces 6c are formed in tapered surfaces.

When both the brackets 2 are fastened by the bolts 7 and the nuts 8, the cushioning member 6 is pressed by the two pinching portions 5 on both sides thereof in a direction parallel to the first side face 1a and pinched. The pressing direction in which the pressing portion 5 presses the buffer member 6 is changed to the tool body 1 side by the inclination of the pressing surface 9, and the pressing force in the direction perpendicular to the first side surface 1a is applied to the buffer member 6. The cushioning member 6 is constantly pressed toward the tool body 1 side, and the tool body 1 is elastically sandwiched between the cushioning members 6 on both sides pressed against the first both side surfaces 1a.

Next, the operation and effect of the embodiment having the above-mentioned structure will be described. In this example, the inner side surface 2a of the pair of brackets 2 holding the tool body 1 is attached to one of the two side surfaces 1a and 1b of the tool body 1 which is perpendicular to the inner side surface 2a of the bracket 2. A pair of pinching portions 5 for pinching the elastically contacting pair of cushioning members 6 are provided so as to face each other, and the pinching portions 5 of each pair of the pinching portions 5 are the cushioning members 6.
The pressing surfaces 9 for diverting the pressing direction for pressing the tool body 1 side are formed in an inclined shape.

For this reason, the clamping members 5 of each pair clamp the cushioning member 6 by utilizing the clamping force to press the cushioning member 6 of each pair against the tool body 1 from both sides thereof, and the tool body 1 is cushioned of each pair. The members 6 can firmly pinch elastically, and the vibration of the tool body 1 can be effectively absorbed by the pair of cushioning members 6 to enhance the vibration damping effect.

[Brief description of drawings]

1 shows an embodiment of the present invention, which is taken along line XX of FIG.
It is a line expansion arrow line view.

FIG. 2 is an exploded view of FIG.

FIG. 3 is a side view of an impact tool.

[Explanation of symbols]

 1 Tool Main Body 1a First Side Surface 2 Bracket 5 Clamping Portion 6 Cushioning Member 7 Bolt 8 Nut 9 Pressing Surface D Impact Tool

Claims (1)

[Scope of utility model registration request] 1. The inner side surface of a pair of brackets holding the tool body is elastically contacted with a pair of side surfaces perpendicular to the inner side surface of the bracket among the two side surfaces of the tool body. A pair of pinching portions for pinching the pair of cushioning members are provided so as to face each other, and a pressing direction in which the pinching portions press the cushioning member is set to the tool body side. A vibration damping device for a striking tool, characterized in that each of the pressing surfaces to be turned is formed in an inclined shape.