Title:
POWER TOOL
Document Type and Number:
WIPO Patent Application WO/2018/230309
Kind Code:
A1
Abstract:
Provided is a power tool that is capable of suppressing peaks in an operating current. The power tool uses a motor 60 as a drive source, and the motor 60 is provided with: a rotor core 62 that has a plurality of magnet insertion holes 62a; a plurality of permanent magnets 63 that are inserted and held in the magnet insertion holes 62a; and a stator core 65 and stator coils 66 that surround the outer periphery of the rotor core 62. The rotor core 62 has recesses 62c that are recessed radially inward in the outer peripheral surface at positions where the respective magnet insertion holes 62a are adjacent to each other in a direction around the axis, and also has slits 62b that each form a space that is contiguous with the corresponding magnet insertion hole 62a and projects from the magnet insertion hole 62a outward in the radial direction of the motor 60.
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Inventors:
TANIMOTO HIDEYUKI (JP)
Application Number:
PCT/JP2018/020163
Publication Date:
December 20, 2018
Filing Date:
May 25, 2018
Export Citation:
Assignee:
KOKI HOLDINGS CO LTD (JP)
International Classes:
H02K1/27; B25F5/00; H02K1/22
Foreign References:
| JP2005245148A | 2005-09-08 | |||
| JP2000270503A | 2000-09-29 | |||
| JP2016209939A | 2016-12-15 | |||
| JPH1189122A | 1999-03-30 | |||
| JP2017017770A | 2017-01-19 | |||
| JP2011097754A | 2011-05-12 |
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