electrical tools

Abstract

The invention discloses an electric tool, which comprises a casing, a motor housed in the casing, an output shaft driven by the motor to rotate, and a chuck connecting the output shaft and a tool. There is an impact ring that can move axially but cannot rotate in the circumferential direction, a rotatable ring with an inner ring gear and a reduction shaft with large and small gears. The reduction shaft is arranged axially parallel to the output shaft of the motor. The motor The output shaft is sleeved with a guide sleeve that can be disengaged from or connected to the chuck in the axial direction. The guide sleeve is provided with an outer ring gear that meshes with the large gear of the reduction shaft, and the pinion gear of the reduction shaft is connected with the The inner ring gear of the ring is meshed, the impact ring and the opposite end surface of the ring are respectively provided with impactable impact teeth, and a spring is arranged between the impact ring and the casing, and one end of the spring is connected to the The casing is connected, and the other end is connected with the impact ring. The electric tool of the invention can disassemble and assemble the cutting tool conveniently and quickly.

Description

technical field [0001] The invention relates to an electric tool, in particular to an electric tool with a rotary cutter. Background technique [0002] Power tools such as electric wood milling and electric drills are usually driven by a motor to rotate the output shaft to drive the tool to rotate for cutting, drilling, etc., but the tool is easily worn during long-term use and needs to be replaced It is often necessary to replace tools of various specifications, but the process of disassembling and assembling tools with a wrench or similar functions is laborious and time-consuming. At the same time, tools such as wrenches are easily lost. British patent GB 2351461A discloses a kind of electric wood milling with bevel gears on both the output shaft and the collet, and the bevel gear on the casing meshes with the bevel gears on the output shaft and the collet at the same time, and the casing is manually rotated The upper bevel gear makes the output shaft and the bevel gear ...

AI Technical Summary

Problems solved by technology

[0002] Power tools such as electric wood milling and electric drills are usually driven by a motor to rotate the output shaft to drive the tool to rotate for cutting, drilling, etc., but in the long-term use process The tool is easy to wear and needs to be replaced, and it is often necessary to replace tools of various specifications during operation, but the process of disassembling and assembling the tool using a wrench or a tool with similar functions is laborious and time-consuming. At the same time, there are tools such as wrenches. Easy to lose and other problems

British patent GB 2351461A discloses a kind of electric wood milling with bevel gears on both the output shaft and the collet, and the bevel gear on the casing meshes with the bevel gears on the output shaft and the collet at the same time, and the casing is manually rotated The upper bevel gear makes the output shaft and the bevel gear on the collet rotate in the opposite direction, so that the collet is released from the output shaft and the tool is replaced. Although this structure of disassembling and assembling the tool solves the problem of tool loss , but the operator needs to rotate the bevel gear on the casing until the chuck is released, which is laborious and time-consuming

And the Chinese patent CN 2376354Y discloses an impact self-locking chuck structure of a gun drill, which can strike the chuck through the motor rotation of the gun drill, so that the chuck is automatically locked to the tool. When the drill rotates and hits the chuck, it is very laborious to hold the chuck cover without turning it, and this impact self-locking chuck structure is only suitable for power tools with low speed, and the scope of use is very limited.

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