Title:
ELECTRICALLY POWERED TOOL
Document Type and Number:
WIPO Patent Application WO/2018/003369
Kind Code:
A1
Abstract:
Provided is an electrically powered tool wherein a switching element and a capacitor, which are used to drive a brushless motor, are effectively arranged, and wherein the effect of cooling the switching element and the capacitor is improved. Provided is an electrically powered tool configured so that a handle section 160 is rotatable relative to a body section 102, wherein a motor housing 200 is formed in a cylindrical integral structure, and a first drive circuit 241 on which a switching element is mounted is received from a rear opening. The first drive circuit 241 is disposed within a circular cylindrical case 231 open to the rear side. A handle housing 161 is provided with an air flow window 165, and a gear case 104 is provided with a discharge opening. When a cooling fan 106 rotates, air is sucked into the handle housing from the air flow window 165. Then, as indicated by the arrow, the air cools, within the motor housing 200, the switching element mounted on the first derive circuit 241, then cools the motor 105, and is discharged to the outside from the discharge opening.
More Like This:
| WO/2023/097001 | WORK AREA CHARGER |
| JPS6224982 | BATTERY TYPE POWER TOOL |
| JP2008178979 | POWER TOOL |
Inventors:
MIYAZAWA KEN (JP)
SAKAI HIRONORI (JP)
SAKAI HIRONORI (JP)
Application Number:
PCT/JP2017/019711
Publication Date:
January 04, 2018
Filing Date:
May 26, 2017
Export Citation:
Assignee:
HITACHI KOKI KK (JP)
International Classes:
B25F5/02; B24B23/02; B25F5/00
Domestic Patent References:
| WO2014069369A1 | 2014-05-08 |
Foreign References:
| JP2010173042A | 2010-08-12 | |||
| JPH01281881A | 1989-11-13 | |||
| JP2009142084A | 2009-06-25 | |||
| JP2007237357A | 2007-09-20 | |||
| JPH0544477U | 1993-06-15 | |||
| JP2010137308A | 2010-06-24 | |||
| JP2011104671A | 2011-06-02 |
Other References:
See also references of EP 3479967A4
Download PDF: