Title:
A POWER TOOL
Document Type and Number:
WIPO Patent Application WO/2010/069273
Kind Code:
A1
Abstract:
A power tool is disclosed. It includes a housing, a motor (2) provided in the housing for a rotation output, an output shaft (7), a planetary gear driving mechanism and a torque control system. The planetary gear driving mechanism including a toothed ring (11) is provided between the motor (2) and the output shaft (7) to transmit a rotation power of the motor (2) to the output shaft (7). The torque control system detects the torque imposed on the toothed ring (11). When the detected torque is equal to or larger than a predetermined value of the power tool, the torque control system prevents the rotational power from the motor (2) from transmitting to the output shaft (7) so as to prevent the damage to the power tool, material or a work piece.
Inventors:
ZHANG SHISONG (CN)
ZHONG HONGFENG (CN)
LIU FANGSHI (CN)
ZHONG HONGFENG (CN)
LIU FANGSHI (CN)
Application Number:
PCT/CN2009/075743
Publication Date:
June 24, 2010
Filing Date:
December 18, 2009
Export Citation:
Assignee:
POSITEC POWER TOOL SUZHOU CO L (CN)
ZHANG SHISONG (CN)
ZHONG HONGFENG (CN)
LIU FANGSHI (CN)
ZHANG SHISONG (CN)
ZHONG HONGFENG (CN)
LIU FANGSHI (CN)
International Classes:
B25B23/14; B23B45/00; B25B21/00; G01L5/24
Domestic Patent References:
| WO2008093625A1 | 2008-08-07 |
Foreign References:
| CN201124405Y | 2008-10-01 | |||
| CN1505555A | 2004-06-16 | |||
| CN2095744U | 1992-02-12 | |||
| US5277527A | 1994-01-11 | |||
| JPH0691551A | 1994-04-05 | |||
| JPH10329051A | 1998-12-15 |
Attorney, Agent or Firm:
SHANGHAI ESSEN PATENT & TREADMARK AGENCY (2FNo. 248, Dongxin Road, Putuo, Shanghai 3, CN)
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