Title:
作業工具
Document Type and Number:
Japanese Patent JP4628963
Kind Code:
B2
Abstract:
It is an object of the invention to provide an effective technique for improving the durability of a torque limiter utilized in a power tool. The object is achieved by a representative power tool (101) comprising a tool bit (119), a driving mechanism and a torque limiter (151). The torque limiter (151) includes first and second rotating members, a ball (155), a pressing member and an elastic member (159). The second rotating member includes a power transmitting region with a groove continuously formed from a deepest groove part to a shallowest groove part to allow torque transmission and a power transmission interrupted region with a groove shallower than the shallowest groove part of the power transmitting region to interrupts the torque transmission. According to this construction, when the ball (155) is in the power transmitting region, the pressing member contacts the first rotating member and is held in a position in which the biasing force of the elastic member (159) is prevented from acting upon the ball.
Inventors:
Hironori Ikuta
Application Number:
JP2006005414A
Publication Date:
February 09, 2011
Filing Date:
January 12, 2006
Export Citation:
Assignee:
Makita Corporation
International Classes:
B25D16/00
Domestic Patent References:
| JP7214477A | ||||
| JP20006041A | ||||
| JP4129677A | ||||
| JP10306865A | ||||
| JP2005305578A | ||||
| JP10252271A |
Foreign References:
| WO2004024398A1 |
Attorney, Agent or Firm:
Tetsuyuki Iwata
Toshiyuki Ikeda
Toshiyuki Ikeda