US 12,323,020 B2
Brushless motor
Osamu Naito, Nagaokakyo (JP); and Miyuki Furuya, Hamamatsu (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Dec. 22, 2022, as Appl. No. 18/087,326.
Application 18/087,326 is a continuation of application No. PCT/JP2021/024719, filed on Jun. 30, 2021.
Claims priority of application No. 2020-166697 (JP), filed on Oct. 1, 2020.
Prior Publication US 2023/0130413 A1, Apr. 27, 2023
Int. Cl. H02K 1/27 (2022.01); H02K 1/2706 (2022.01); H02K 7/09 (2006.01); H02K 29/00 (2006.01)
CPC H02K 29/00 (2013.01) [H02K 1/2706 (2013.01); H02K 7/09 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A brushless motor, comprising:
a rotor including:
a shaft,
a rotor yoke configured to hold the shaft and that covers a peripheral surface of the shaft, and
a magnet disposed around an outer periphery of the rotor yoke;
a stator disposed around an outer periphery of the rotor;
a bearing member configured to rotatably hold the shaft;
an attraction-force producing member that is disposed at an end of the bearing member at which the rotor yoke holds the shaft, and that is configured to produce an attraction force to attract the rotor yoke;
an attraction-force supplementary member configured to supplement the attraction force; and
a position adjusting member that is in contact with an end of the shaft that is opposite to an end held by the rotor yoke, and that is configured to adjust a position of the rotor in an axial direction of the shaft.