SU937138A1 - Vibration supressing device for hand percussion and percussion-rotation tools - Google Patents

Description

(54) VIBRATING DEVICE FOR MANUAL IMPACT AND IMPACTING AND ROTATING TOOLS

one

The invention relates to reducing the harmful effect on a human operator of vibration and shock and can be used in hand percussion and rotary percussion instruments, such as hammers, rotary hammers, etc.

A vibration damping device for hand-held percussion and impact-rotational tools is known, comprising a handle holder, a tube bracket, a resilient element disposed in the latter and a cross member connecting the elastic element with a handle holder. The elastic element is made in the form of a segment of steel cable 1.

The disadvantages of the device include the impossibility. restructuring the characteristics of the elastic element when the frequency and amplitude of vibration change and, consequently, the effectiveness of vibration absorption is low.

The purpose of the invention is to increase the effectiveness of vibration absorption.

This goal is achieved by the fact that 20 in a vibration-suppressing device for hand-held percussion and impact-rotational tools, comprising a handle holder, a bracket with a pipe, a resilient element placed in the latter and a cross member connecting the elastic element with the handle holder left thread on the outer surface, the elastic element - in the form of a twisted tubular spring with right and left winding direction and thickening in the middle part of the pipe diameter, and the device is equipped with two threaded couplings with right and left oh incisions, each of which is disposed on the corresponding thread portion tkoderzhatel handle and rigidly coupled with them by means of a traverse two cups mounted at the ends of the tube and having at the bottom a through hole profile, response profile corresponding winding end of the elastic member.

FIG. 1 shows the device, a general view with a partial cut; in fig. 2 - time cut AA in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. one

Claims (1)

The device contains a handle holder 1 with handles 2 and 3 and sections 4 and 5 with a right Ileva thread on the outer surface, an elastic element 6, a bracket 7 with a pipe 8 in which the elastic element 6 is located. The elastic element 6 is made in the form of a twisted tubular springs (figs. 2 and 3) having screw surfaces 9 and 10 with right and left winding directions, and a thickening 11 in the middle part along the diameter of the pipe 8. The thickening 11 is fixed in the pipe 8 by means of a clip consisting of a finger 12 with a notch under thickening 11 and with a threaded end and a nut 13. The ntovy surfaces 9 and 10 of the elastic element 6 are coupled with the glasses 14 and 15, mounted for movement at the ends of the pipe 8 and rigidly connected by means of cross-arms 16 and 17 with threaded couplings 18 and 19, which are located on the threaded sections 4 and 5. The device works in the following way. The rigidly fixed thickening 11 in the pipe 8 of the bracket 7 and connected with the working surfaces 9 and 10 using the glasses 14 and 15, the traverse 16 and 17, and the couplings 18 and 19 with the handle holder 1 Vit tube spring dampens vibrations by its own elastic twisting deformation. The restructuring of the working characteristic of the elastic element 6 by changing the working number of turns, which affects its rigidity, is carried out as follows. Using a nut 13, lower the clamp and rotate the handles 2 and 3 of the handle holder 1 around its longitudinal axis. Due to the presence of threaded pairs in the opposite direction, the cuttings of the sleeves 18 and 19 move mutually (if necessary, increase the stiffness of the elastic element 6, they must be brought together). The glasses 14 and 15, which are rigidly connected to the crossbars 16 and 17, slid along the screw surfaces 9 and 10 of the elastic element, cause it to turn, simultaneously changing the number of windings separated by the glasses 14 and 15 to participate in the vibration damping of the coils. After reaching the required position of the glasses and the required , limiting the number of working turns, the clamp is tightened. After that, the vibration damper is ready for operation. Thus, in the proposed device, it is possible to adjust the characteristics of the elastic element, which entails an increase in the efficiency of vibration absorption as the frequencies and amplitudes of vibration change. Vibration absorbing device for hand percussion and rotary percussion instruments comprising a handle, a tube bracket, a resilient element placed in the latter, and crossheads connecting the elastic element with a handle holder, characterized in that, in order to increase the effectiveness of vibration penetration, the handle tkoderzhatel, made with right and left threads on the outer surface, the elastic element in the form of a twisted tubular spring with the right and left direction of winding and thickening in the middle part of the diameter of the pipe, and The device is equipped with threaded couplings with right and left cuts, each of which is located in the corresponding section of the handle's thread, and rigidly connected to them by means of cross-arms two cups installed at the ends of the pipe and having a through-shaped profile hole in the bottom elastic element. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 348727, cl. E 21 C 19/00, 1970 (prototype). Vua.1 Fig 2 fpu2.3