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Patent Searching and Data


Title:
ELECTRIC TOOL
Document Type and Number:
WIPO Patent Application WO/2016/208351
Kind Code:
A1
Abstract:
In order to provide an electric tool that has improved motor cooling efficiency, a universal motor 3 provided on a portable circular saw 1, which is the electric tool, comprises an output shaft 31, a cooling fan 32 that is affixed to the output shaft 31, an armature 6 that is affixed to the output shaft 31, and a stator 7 that is provided with a facing surface 71D that faces the armature 6 in the radial direction of the output shaft 31. The facing surface 71D is provided with a cooling groove 71a which is recessed in the radial direction of the output shaft 31, and which extends in the axial direction of the output shaft 31.

Inventors:
TANIMOTO HIDEYUKI (JP)
Application Number:
PCT/JP2016/066412
Publication Date:
December 29, 2016
Filing Date:
June 02, 2016
Export Citation:
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Assignee:
HITACHI KOKI KK (JP)
International Classes:
H02K1/20; B25F5/00; H02K1/14; H02K9/06
Foreign References:
JP2007082366A2007-03-29
JP2004064993A2004-02-26
JPH10229653A1998-08-25
JP2006067639A2006-03-09
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