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Electric hammer

A technology of electric hammer and clutch part, which is applied in the direction of striking tools, light impact tools, manufacturing tools, etc., can solve the problems of the temperature rise of the casing, affecting the life of the whole machine, wear heat, etc. easy-to-achieve effects

Active Publication Date: 2012-08-15
NANJING CHERVON IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, if one clutch is used and spring loaded as described above, there is constant contact between the clutch and the parts operating the clutch under spring pressure, so friction, wear and a lot of heat will be generated when the machine is working, causing the casing The temperature rises and affects the life of the whole machine

Method used

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Embodiment Construction

[0025] The specific implementation manners of the present invention will be further described in detail according to the accompanying drawings.

[0026] Such as Figure 1 to Figure 4 Shown is a schematic diagram of the internal structure of a preferred electric hammer in the present invention, wherein, for the sake of clarity, the casing of the electric hammer is removed, and a rotatable tool holding part 21 is supported at the front of the main shaft 20 in the casing , a tool as a processing head can be installed at the front end of the tool holding part 21, and the tool can be a drill bit, a screwdriver or a spade chisel, etc., and a motor (not shown) is provided at the rear of the casing. The parallel side of the part 21 supports the intermediate shaft 1, which is rotated by the output shaft of the motor.

[0027] A pinion 2 as a rotation transmission part is provided on the front of the intermediate shaft 1. The pinion 2 is rotatably arranged on the intermediate shaft 1 a...

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PUM

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Abstract

The invention provides an electric hammer. The electric hammer comprises an enclosure, a motor, a transmission mechanism, a clutching device and an operating device, wherein the enclosure is used for supporting a tool maintaining part, the motor is placed in the enclosure, and the transmission mechanism ensures a rotation transferring pair tool of the motor to rotate and / or impact; the transmission mechanism comprises a middle shaft, the middle shaft is provided with a rotation transferring part and an impaction transferring part, and the rotation transferring part and the impulsion transferring part can respectively solely rotate independently of the middle shaft; the clutching device is provided with a first clutching part used for ensuring the rotation transferring part and the middle shaft to rotate integrally, and a second clutching part used for ensuring the impulsion transferring part and the middle shaft to rotate integrally; and the operating device can carry out operation on the clutching device from the outer side of the enclosure, wherein the first clutching part and the second clutching part can be relatively independently toggled through the operating device respectively so as to move along the axial direction of the middle shaft. According to the invention, the clutching device has no friction with the operating device in each gear, the machine life is prolonged, the structure of the complete machine is compact, the function is easy to realize, and the use is reliable.

Description

technical field [0001] The invention relates to an electric hammer capable of transmitting rotation and / or impact to a processing head at the top. Background technique [0002] Electric hammer, also known as hammer drill, is a widely used chisel tool. The electric hammer is driven by the transmission mechanism to drive the piston to reciprocate and compress the air in a cylinder. The periodic change of the air pressure in the cylinder drives the hammer in the cylinder to reciprocate and hit the top of the drill bit, so that the drill bit is rotated while being subjected to a direction parallel to the drill bit. The reciprocating hammering movement can realize the striking and drilling functions at the same time. [0003] As far as the electric hammer is concerned, the following structure is widely known. As shown in Japanese Patent No. 2828657, a rotatable main shaft (tip tool holder) is supported in the front part of the housing, and the main shaft can be maintained at the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25D16/00B25D17/00
Inventor 吕岳
Owner NANJING CHERVON IND