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Electric hammer with magnetic impacting mechanism

A technology of impact mechanism and magnetic force, applied in the field of hand-held electric tools, can solve the problems of large vibration and noise, high manufacturing cost, heat energy, etc., and achieve the effect of reducing vibration and noise and having a simple structure

Inactive Publication Date: 2008-01-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This structure that uses the reciprocating motion of the piston to generate impact force requires high sealing performance of the piston chamber, high manufacturing cost, heat generation and energy loss due to friction, and very large vibration and noise.

Method used

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  • Electric hammer with magnetic impacting mechanism
  • Electric hammer with magnetic impacting mechanism

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Embodiment Construction

[0015] As shown in Fig. 1, Fig. 2 and Fig. 3, the present invention includes a housing 18, a motion transmission mechanism composed of a motor 12, a bull gear 10, an intermediate gear 13, a pinion 15 and a driving gear 16, an impact mechanism and a drill chuck 20. The impact mechanism is a magnetic impact mechanism, and its fixed sleeve 1 is a stepped shaft, which is fixed in the housing 18 and cannot move or rotate axially. The drive shaft 3 is installed in the stepped shaft, which is located at the small end of the fixed sleeve 1 One end of the drive shaft 3 inside is coaxially equipped with an impact hammer 2, the drive shaft 3 has a guide groove in the axial direction, the fixed sleeve 1 has a hole in the radial direction of the small end of the stepped shaft, and the guide pin 4 is installed in the hole and inserted into the drive shaft. In the guide groove of 3, a drive disc 5 and a rotating disc 8 are installed in the stepped shaft hole at the large end of the fixed sle...

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Abstract

The present invention discloses one kind of electric hammer with one magnetic percussion mechanism. The electric hammer includes one casing, one motion transferring mechanism, one magnetic percussion mechanism and one drill chuck. The magnetic percussion mechanism has one fixed sleeve inside the casing, one driving shaft inside the fixed sleeve, one percussion hammer mounted onto one end of the driving shaft, one driving disc with annular notch holding permanent magnet, one rotating disc connected to the rotating shaft and with also annular notch holding permanent magnet. These two permanent magnets in rotating produce repulsion force and attraction force periodically to make the driving disc move back and forth on the rotating shaft and the percussion hammer produce percussion. These two permanent magnets without mutual contact result in less vibration and noise.

Description

technical field [0001] The invention relates to a hand-held electric tool, in particular to an electric hammer with a magnetic impact mechanism. Background technique [0002] For manual machine tools with impact drivers, such as electric hammers, the traditional working method of this type of electric hammer is as follows. The rotary motion of the motor reaches the rotating sleeve through the gear transmission mechanism fixed on the shaft, and the rotation of the rotating sleeve One end is equipped with a drill chuck, which drives the drill bit to rotate. In addition, the rotary motion of the motor reaches the crank mechanism through the gear transmission mechanism fixed on the shaft, which converts the rotary motion of the motor into the reciprocating motion of the connecting rod, and pushes the piston to compress the air to generate impact. force, and then make the impact hammer and punch reciprocate, hit the drill bit, and finally realize the hammer drilling function of t...

Claims

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Application Information

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IPC IPC(8): B25D13/00
Inventor 邱清盈张惠冯培恩王朝霞
Owner ZHEJIANG UNIV
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