Title:
ELECTRICALLY POWERED TOOL
Document Type and Number:
WIPO Patent Application WO/2019/130979
Kind Code:
A1
Abstract:
Provided is an electrically powered tool wherein a brushless motor is adopted to make the electrically powered tool maintenance-free and to provide the electrically powered tool with a long service life, and wherein a circuit element which generates heat when power is supplied to the brushless motor can be effectively cooled. The electrically powered tool is provided with: a housing 2 having formed therein an air intake hole 2a and an air discharge hole 2b; a brushless motor 3 supported by the housing 2; a power supply circuit 9 having at least one circuit element for supplying the power of an external power source P to the brushless motor 3; and a fan 5 driven by the rotation of the brushless motor 3 to generate, within the housing 2, cooling air flow flowing from the air intake opening 2a to the air discharge opening 2b. The housing 2 has a handle housing 21 having a handle section 211 and supporting the brushless motor 3. The air intake hole 2a is formed in the handle housing 21. The at least one circuit element is disposed in the handle housing 21 and is cooled by the cooling air flow generated by the fan 5.
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Inventors:
TADOKORO NAOKI (JP)
INUI KEN (JP)
INUI KEN (JP)
Application Number:
PCT/JP2018/044197
Publication Date:
July 04, 2019
Filing Date:
November 30, 2018
Export Citation:
Assignee:
KOKI HOLDINGS CO LTD (JP)
International Classes:
B25F5/00
Domestic Patent References:
| WO2016067810A1 | 2016-05-06 |
Foreign References:
| JP2016193477A | 2016-11-17 | |||
| JP2015100887A | 2015-06-04 | |||
| JP2016093848A | 2016-05-26 | |||
| US20150336232A1 | 2015-11-26 | |||
| JP2013180382A | 2013-09-12 |
Other References:
See also references of EP 3733351A4
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