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Dynamic tool

A power tool and drive shaft technology, which is applied in the field of power tools with fast elastic chucks, can solve the problems of large friction, large space occupation, and complex structure of the clutch mechanism, and achieve the effect of small length and compact structure

Inactive Publication Date: 2009-04-22
POSITEC POWER TOOLS (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The structure of the above-mentioned clutch mechanism is complicated, takes up a large space, and the length of the whole tool is very long, and the end teeth of the clutch mechanism are in surface contact with each other, so the friction force is relatively large, and the energy consumption is relatively large.

Method used

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Effect test

Embodiment Construction

[0070] The present invention takes an electric drill as a preferred embodiment. The electric drill has a casing 15 , a drive shaft 20 disposed in the casing, and a collet 1 mounted on the drive shaft 20 .

[0071] refer to Figure 1 to Figure 5 As shown, in the first preferred embodiment of the present invention, the collet 1 has a second sleeve 2 , a center body 3 , a pawl 4 and a nut 5 . The center body 3 is a center body, and has a front part 6 and a rear part 7 . An axial hole 8 is formed in the front part 6, the diameter of the axial hole 8 being larger than the maximum diameter of the shank of the tool held by the collet 1 . A cylindrical threaded hole 9 of standard size is formed in the rear part 7, and the threaded hole 9 is matched with a cylindrical driving shaft 20 on the electric drill. The threaded hole 9 can also be a standard-sized tapered hole for mating with the tapered drive shaft 20 .

[0072] Three channels 22 are formed on the central body 3 at an angl...

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PUM

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Abstract

The invention discloses a power tool, which comprises a machine shell, a driving shaft arranged on the machine shell, and a clamping chuck connected to the driving shaft, wherein the clamping chuck comprises a central body which is provided with a head part and a tail part, the tail part is arranged to match the driving shaft so that the central body rotates along with the driving shaft, and the head part comprises an axial hole and a plurality of passages which are arranged to form angles and are intersectant with the axial hole; a plurality of detents are positioned in each passage in a sliding mode, and each detent comprises a detent surface formed on one side and screw threads formed on the opposite side; a nut is rotatably arranged on the central body through fit with the screw threads on the detents so that the rotation of the nut drives the detents to move axially in the passages; and a clutch mechanism is arranged on the machine shell and comprises at least one radial moving piece. The power tool has smaller length and a compact structure.

Description

technical field [0001] The invention relates to a power tool, in particular to a power tool with a quick-release chuck. Background technique [0002] A traditional drill or screwdriver tool has a casing, a drive shaft disposed on the casing, and a collet connected to the drive shaft, and the collet is used to hold the tool head. [0003] US Patent No. 4,526,497 discloses a tool with a quick release collet, having a housing and a drive shaft, a collet connected to the drive shaft, the collet comprising a center body having a head and a tail, the tail is provided with For cooperating with the drive shaft so that the central body rotates with the drive shaft, the head includes an axial hole and a number of channels arranged at an angle and intersecting the axial hole, and 3 pawls are slidably located in each In the channel, each pawl includes a pawl surface formed on one side and a thread formed on the opposite side, and the pawl propulsion device cooperates with the thread on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B31/38B23B31/165
Inventor 顾育明张士松
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD