Electric hammer with shock absorber

Abstract

Disclosed is an automatic mallet with a damping device. The automatic mallet comprises a shell unit, an automatic mallet unit and the damping device. The shell unit comprises a shell and a drive handle. The drive handle is provided with a pivot end, pivoted to the shell, and a free end. The free end can swing, with the pivot end used as the pivot. The automatic mallet unit comprises a mallet rod and a drive set. The mallet rod penetrates in the shell unit and is driven by the drive set to do reciprocating motion along the length thereof. The damping device comprises an orbit determined arc rod and an elastic member. The orbit determined arc rod is connected between the shell and the free end. The elastic member is abutted against between the orbit determined arc rod and the shell unit. The orbit determined arc rod extends along the swing path of the free end to movably penetrate the shell unit.

Description

Technical field [0001] The invention relates to an electric hammer, in particular to an electric hammer with a shock absorption device. Background technique [0002] Common electric hammers mostly have a roughly L-shaped body, a hammer rod and a drive group respectively arranged on the body, and a handle installed behind the body. During use, the corresponding reaction force will be generated due to the reciprocating impact of the hammer rod on the object to be struck, so that when the operator holds the grip for operation, it is often subjected to a lot of vibration. Once the operation time is extended, it is easy It will cause damage to the hand joints. Therefore, many electric hammer grip shock absorption technologies appear. [0003] For example, the electric hammer damping device disclosed in US Patent No. 6,148,930 has an L-shaped body, a hammer rod and a drive group respectively arranged on the body, and a hollow U-shaped grip with an opening facing the body. A pair of sho...

AI Technical Summary

Problems solved by technology

Although the use of the cantilever shrapnel can absorb the yaw shock during operation, this suspension design not only increases the overall volume of the housing, but also because the compression spring and the cantilever shrapnel will fully bear the operating force and reaction On the contrary, it will reduce the overall structural strength and has the disadvantage of poor durability

[0005] And another type of electric hammer damping device to improve the uneven stress on the handle, as disclosed in US Patent No. US7,523,791, is to pivot the handle at the rear of the body where the hammer rod and the drive group are installed, and use A shock-absorbing spring connected between the handle and the body provides yaw buffering, however, during operation of this type of design, the handle will swing around the pivot joint, so the shock-absorbing spring will simultaneously receive linear stress in the direction of movement of the hammer The force and the angle of the grip swinging pressure are stressed, and it is easy to distort and deform, resulting in problems such as reduced service life or inaccurate hitting points of the hammer rod.

[0006] US Patent No. 7,886,838 aims to improve the problem of twisting and deformation of a single shock-absorbing spring under pressure in different directions. Two groups of shock-absorbing springs are set, one of which is responsible for buffering the linear vibration caused by the action of the hammer rod, and the other It is responsible for buffering the yaw vibration caused by the swing of the grip. Although this design can slightly reduce the distortion problem of the single shock absorbing spring design, the use of multiple sets of shock absorbing mechanisms will make the overall structural design more complicated and thus increase the cost. Otherwise, the setting of multiple sets of damping springs will also increase the error range of the hammer rod hitting point, and there is still room for improvement

Images