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Patent Searching and Data


Title:
POWER TOOL
Document Type and Number:
Japanese Patent JP2013066943
Kind Code:
A
Abstract:

To provide a power tool capable of suppressing an unnecessary switching operation caused by kickbacking or the like by making kickbacking or chattering difficult to occur during automatic transmission.

A power tool includes a reduction mechanism 4 for reducing the rotational force of a motor 1 to transmit it to an output part 3, a switching mechanism 8 for switching the gear reduction ratio of the reduction mechanism 4, a control unit 60 for controlling the switching mechanism 8, and a driving state detection unit 62 for detecting the driving state of the motor 1. The reduction mechanism 4 is switched between a high-speed low torque state and a low-speed high torque state by the switching mechanism 8. The control unit 60 executes control to switch the gear reduction ratio when the driving state satisfies a prescribed condition, and a transmission point in the case of switching from the high-speed low torque state is different from that in the case of switching from the low-speed high torque state.


Inventors:
Umikura, Hiroyuki
Arimura, Sunao
Yamada, Minoru
Inagaki, Kenichiro
Atsumi, Masatoshi
Matsumoto, Koji
Application Number:
JP2011000204994
Publication Date:
April 18, 2013
Filing Date:
September 20, 2011
Export Citation:
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Assignee:
PANASONIC ECO SOLUTIONS POWER TOOLS CO LTD
International Classes:
B25F5/00
Domestic Patent References:
JPH068151A1994-01-18
JPH10103462A1998-04-21
JP2003120799A2003-04-23
JPH068151A1994-01-18
Attorney, Agent or Firm:
西川 惠清
水尻 勝久
坂口 武
北出 英敏