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Title:
動力工具
Document Type and Number:
Japanese Patent JP5429528
Kind Code:
B2
Abstract:

To provide a power tool which prevents uneven wear of a ratchet sawtooth pawl caused in a fixed ratchet due to the deflection of a resin inner cover part and improves the efficiency of drilling work in a vibrating drill power tool having a fixed ratchet (second ratchet) engaged with a rotating ratchet (first ratchet) at the inner cover part of a resin molded body.

A ratchet stretching part 8c for increasing a contact surface with the inner cover part 1b is formed on the second ratchet 8, and the deflection of the inner cover part 1b generated in hitting of the ratchet is reduced by sandwiching the ratchet stretching part 8c between the inner cover part 1b and a gear cover part 1c, thereby to prevent the uneven wear of the second ratchet 8.

COPYRIGHT: (C)2011,JPO&INPIT


Inventors:
Ken Miyazawa
Application Number:
JP2009114677A
Publication Date:
February 26, 2014
Filing Date:
May 11, 2009
Export Citation:
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Assignee:
Hitachi Koki Co., Ltd.
International Classes:
B23B45/16; B25F5/00
Domestic Patent References:
JP58059509U
JP2002263930A
JP59109407U
JP2008183639A
Attorney, Agent or Firm:
Hiroshi Izawa



 
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