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Patent Searching and Data


Title:
POWER TOOL
Document Type and Number:
Japanese Patent JP2020121406
Kind Code:
A
Abstract:
To provide a power tool in which a switching element for driving a brushless motor and a capacitor are effectively arranged and which improves cooling effects of the switching element and the capacitor.SOLUTION: In a power tool in which a handle section 160 is made rotatable with respect to a body section 102, a motor housing 200 is formed into a cylindrical built-in type, and a first drive circuit 241 in which a switching element is mounted from a rear side opening is stored. The first drive circuit 241 is arranged in a cylindrical case 231 opened on a rear side. A handle housing 161 is provided with a wind window 165. A gear case 104 is provided with an exhaust port. When a cooling fan 106 is rotated, air is sucked from the wind window 165 to the inside of the handle housing, and the air cools a motor 105 and is discharged from the exhaust port to an outside after cooling the switching element mounted in the first drive circuit 241 in the motor housing 200, as shown by arrows.SELECTED DRAWING: Figure 10

Inventors:
MIYAZAWA TAKESHI
SAKAI HIROKI
Application Number:
JP2020075643A
Publication Date:
August 13, 2020
Filing Date:
April 21, 2020
Export Citation:
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Assignee:
KOKI HOLDINGS CO LTD
International Classes:
B25F5/02; B24B23/02; B25F5/00
Domestic Patent References:
JP2007237357A2007-09-20
JP2010173042A2010-08-12
JP2011104671A2011-06-02
JP2009142084A2009-06-25
JPH01281881A1989-11-13
JPH0544477U1993-06-15
JP2010137308A2010-06-24
JP2016087702A2016-05-23
Foreign References:
WO2018003369A12018-01-04
WO2014069369A12014-05-08
Attorney, Agent or Firm:
Aoritsu patent business corporation