SU1652548A1 - Pneumatic hammer drill - Google Patents

Abstract

The invention relates to mining and construction and is intended for percussion drilling. The goal is to improve the sanitary and hygienic working conditions by reducing the vibration of the handle 1 and the body (K) 2 of the hammer. Between K 2 and the handle 1, a means for damping the vibration, made in the form of a fluid-filled closed chamber, is installed. The end walls of the chamber are made in the form of the upper 5 and lower 6 elastic diaphragms (UD), and the side walls are formed by an elastic ring (EC) 4, with which UD 5 and 6 are connected. axial displacement relative to K 2. A drummer is placed in the cavity of the barrel 3. Through the fastening elements EC 4 is alternately connected with K 2 and the handle 1. Compressed air enters the barrel 3 through the fitting 9 and carries out the work of the striker. Barrel 3 reciprocates. Due to the rigid connection of the stem 3 with the UD 6, there is a redistribution of the support reaction force from a strictly axial directionality into a spherical shape and thereby its extinction by the elastic properties of EC 4, 1, or ill. with C

Description

The invention relates to mining and construction, in particular to pneumatic percussion devices.

The purpose of the invention is to improve the sanitary and hygienic working conditions by reducing the vibration of the handle and the housing.

The drawing shows the structural diagram of the proposed device.

A pneumatic hammer consists of a handle 1, body 2, and a barrel 3 in which the hammer is located. Between the handle 1 and the housing 2 is placed vibration damping means, made in the form of an elastic, for example rubber, ring 4, which is fastened with fastening elements (bolts) alternately to the handle 1 and the housing 2. The elastic ring 4 is closed at the ends with elastic diaphragms 5 and 6 forming a cavity which is filled with liquid. The housing 2 is axially displaced relative to the barrel 3 by means of damping pads 7 and 8. There is a fitting 9 on the barrel 3 for supplying compressed air. A hammer moving in the barrel 3 (not shown) acts on the tool 10. The barrel 3 is rigidly connected to the lower elastic aperture 6.

Pneumatic hammer works as follows.

The energy absorber (compressed air) through the nozzle 9 enters the barrel 3 and carries out the work of the impactor. The barrel 3 in this case makes a reciprocating motion

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slippage on the damping pads 7 and 8. Since the barrel 3 is rigidly connected with the diaphragm b, which allows using a liquid, redistribute the support reaction force from the strictly axial direction into a spherical shape and thereby extinguish it by the elastic properties of the elastic ring 4.

Claims (1)

Claims of the invention A pneumatic hammer comprising a handle, a housing, and a barrel, in the cavity of which a hammer is disposed, mounted between the housing and the handle, means for damping vibration, characterized in that. with 0 five In order to improve the sanitary and hygienic working conditions by reducing the vibration of the handle and body, the means for damping vibration is made in the form of a fluid-filled closed chamber, the end walls of which are made in the form of upper and lower elastic diaphragms, and the side ones are formed by an elastic ring with which diaphragm, wherein the barrel is rigidly connected with the lower elastic diaphragm and mounted with the possibility of axial movement relative to the body, and the elastic ring by means of fasteners is alternately connected with rus and handle. Yu  }