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Patent Searching and Data


Title:
A SPEED CHANGING TOOL
Document Type and Number:
WIPO Patent Application WO/2010/048889
Kind Code:
A1
Abstract:
A speed changing tool(9) has a motor (2), an output shaft (6), a gear transmission mechanism (4) connected with motor (2) and output shaft (6) and a control system (8). The control system (8) includes a control unit (3) and a driving device (5). The driving device (5) is provided with a moving element (45), which may move between a first position and a second position within the gear transmission mechanism (4). The output shaft(6) has different output characteristics when the moving element (45) is located at the first position and the second position, respectively. When load torque is changed to preset value, the control unit (3) firstly adjusts torque sent from the motor (2) to the gear transmission mechanism(4), then controls the driving device (5) to realize automatic shift.

Inventors:
WANG JIADA (CN)
CHEN CHENGZHONG (CN)
ZHANG SHISONG (CN)
ZHONG HONGFENG (CN)
LIU FANGSHI (CN)
BORINATO GIANNI (IT)
BROWN WARREN (AU)
ANDRIOLO PAOLO (IT)
Application Number:
PCT/CN2009/074677
Publication Date:
May 06, 2010
Filing Date:
October 29, 2009
Export Citation:
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Assignee:
POSITEC POWER TOOL SUZHOU CO L (CN)
WANG JIADA (CN)
CHEN CHENGZHONG (CN)
ZHANG SHISONG (CN)
ZHONG HONGFENG (CN)
LIU FANGSHI (CN)
BORINATO GIANNI (IT)
BROWN WARREN (AU)
ANDRIOLO PAOLO (IT)
International Classes:
F16H3/44; B23B45/02; B23B47/14; B25B21/00; B25D16/00; B25F5/00; F16H59/04; F16H61/00
Foreign References:
CN201093036Y2008-07-30
CN101091998A2007-12-26
US4869131A1989-09-26
EP0787931B12001-12-05
CN201335130Y2009-10-28
CN101377229A2009-03-04
CN201300407Y2009-09-02
CN201300408Y2009-09-02
CN201300409Y2009-09-02
CN201309145Y2009-09-16
CN201300410Y2009-09-02
JP2004160592A2004-06-10
CN1748950A2006-03-22
Attorney, Agent or Firm:
SHANGHAI ESSEN PATENT & TREADMARK AGENCY (2FNo. 248, Dongxin Road, Putuo, Shanghai 3, CN)
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