Title:
ELECTRIC IMPACT WRENCH
Document Type and Number:
WIPO Patent Application WO/2002/092289
Kind Code:
A1
Abstract:
The present invention relates to an electric tool, especially to an electric wrench. The electric wrench includes a shell (16), a DC motor (14) controlled by a switch unit (23) and having its shaft coupling to a flywheel shaft (17) through a clutch (9), which clutch is set in a protecting case (11) and can slide on the said shaft (17) axially, on the flywheel shaft (17), there are a spring (10) worn on and a flywheel (5) with a ratchet slot in which a ratchet block is mounted, a stop pin (8) having one end connecting to the clutch (9) and the other end being inserted into the lower portion of the ratchet block (6) of the flywheel (5), a spindle (4) mounted in a sleeve and a bearing, which one end as a connection end extends out of the front end surface of the shell (16) while the other end provides with a ratchet tooth (30) which is mounted in the flywheel (5) and has same axial position with the ratchet block (6). Compared to a conventional electric wrench, the present invention is bigger in impact moment, smaller in volume, convenient in application and lower in work intensity.
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Inventors:
LAI HOUXIANG (CN)
LAI HOUXUAN
XIAO YUBIN
HU RONGHUA
LAI HOUXUAN
XIAO YUBIN
HU RONGHUA
Application Number:
PCT/CN2001/000890
Publication Date:
November 21, 2002
Filing Date:
June 04, 2001
Export Citation:
Assignee:
LAI HOUXIANG (CN)
International Classes:
B25B21/02; (IPC1-7): B25B21/02
Foreign References:
| US5740892A | 1998-04-21 | |||
| CN2302093Y | 1998-12-30 | |||
| EP0479713A2 | 1992-04-08 | |||
| US5887666A | 1999-03-30 | |||
| US5771516A | 1998-06-30 | |||
| US5435398A | 1995-07-25 | |||
| US4947939A | 1990-08-14 |
Attorney, Agent or Firm:
Changsha, Zonekey Patent Law Firm (135 Bayi Road Changsha Hunan 1, CN)
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