发明授权
- 专利标题： Electric power tool
- 专利标题（中）： 电动工具
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申请号： US14106609申请日： 2013-12-13
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公开(公告)号： US09590475B2公开(公告)日： 2017-03-07
- 发明人: Katsuhiro Oomori , Junichi Tokairin , Hiroki Uchida
- 申请人： Hitachi Koki Co., Ltd.
- 申请人地址： JP Tokyo
- 专利权人： Hitachi Koki Co., Ltd.
- 当前专利权人： Hitachi Koki Co., Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Kilpatrick Townsend & Stockton LLP
- 优先权： JP2008-141409 20080529; JP2008-224176 20080901
- 主分类号： B25F5/02
- IPC分类号： B25F5/02 ; H02K9/06 ; B25F5/00 ; H02K7/14
摘要：
According to an aspect of the invention, an electric power tool which includes a brushless direct-current motor and a drive circuit that supplies drive power to the motor, and which rotates or drives a tool, characterized in that the drive circuit includes plural switching elements, and is arranged on a board provided in a grip portion of a housing or below the grip portion; and an electric fan is provided in the vicinity of the switching element for cooling the switching element.
公开/授权文献
- US20140139055A1 Electric Power Tool 公开/授权日：2014-05-22
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