US 12,445,010 B2
Ball bearing holding structure and fan motor
Norihisa Tanikawa, Chiba (JP); Kenji Shiraki, Chiba (JP); and Sakie Kawakami, Chiba (JP)
Assigned to MABUCHI MOTOR CO., LTD., Chiba (JP)
Filed by MABUCHI MOTOR CO., LTD., Chiba (JP)
Filed on Jun. 23, 2023, as Appl. No. 18/340,031.
Claims priority of application No. 2022-102583 (JP), filed on Jun. 27, 2022.
Prior Publication US 2023/0421014 A1, Dec. 28, 2023
Int. Cl. H02K 5/16 (2006.01); F16C 19/06 (2006.01); F16C 35/06 (2006.01); H02K 5/173 (2006.01); H02K 7/08 (2006.01); H02K 21/22 (2006.01)
CPC H02K 5/1735 (2013.01) [F16C 19/06 (2013.01); F16C 35/06 (2013.01); H02K 7/085 (2013.01); H02K 21/22 (2013.01); F16C 2380/26 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A ball bearing holding structure for rotatably supporting a shaft, the ball bearing holding structure comprising:
a bearing holder including a cylindrical holder portion into which the ball bearing is internally fitted from one side in an axial direction of the shaft, and a positioning portion provided on an other side in the axial direction of the holder portion and abutting on the ball bearing from the other side; and
a mounting plate having a cylindrical mounting portion in which a portion of the holder portion is press-fitted from the other side, wherein
an inner surface of the holder portion is provided with an adhesion surface, a relief surface and a step surface; wherein the adhesion surface bonded to an outer peripheral surface of the ball bearing by an adhesive, the relief surface having an inner diameter larger than an inner diameter of the adhesion surface on the one side, and the step surface connecting the adhesion surface and the relief surface, and an axial position of the step surface is a position overlapping the ball bearing in a state wherein the ball bearing is engaged to the bearing holder.