Title:
BRUSHLESS MOTOR
Document Type and Number:
WIPO Patent Application WO/2022/070538
Kind Code:
A1
Abstract:
A brushless motor (10) comprises: a rotor (30); a stator (40); a bearing member; an attracting magnet (27); and a yoke (28). The rotor (30) comprises: a shaft (33); a rotor yoke (31) that holds the shaft (33) and covers the peripheral surface of the shaft (33); and a magnet (32) that is disposed on the outer periphery of the rotor yoke (31). The stator (40) is disposed on the outer peripheral side of the rotor (30). An inner wall (223) of a case (21) that is a bearing member holds the shaft (33) via a bearing (26) in a rotatable manner. The attracting magnet (27) is disposed on an end of the inner wall (223) on the side where the rotor yoke (31) holds the shaft (33), and generates an attracting force toward the rotor yoke (31). The yoke (28) supplements and intensifies the attracting force generated by the attracting magnet (27).
Inventors:
NAITO OSAMU (JP)
FURUYA MIYUKI (JP)
FURUYA MIYUKI (JP)
Application Number:
PCT/JP2021/024719
Publication Date:
April 07, 2022
Filing Date:
June 30, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H02K5/167; H02K7/08
Foreign References:
| JPH0523782U | 1993-03-26 | |||
| JP2007318985A | 2007-12-06 | |||
| JP2001157407A | 2001-06-08 | |||
| JP2005168264A | 2005-06-23 | |||
| JPH11275806A | 1999-10-08 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
Download PDF: