公开(公告)号：US11441668B2

公开(公告)日：2022-09-13

申请号：US17266099

申请日：2019-10-08

Applicant: MITSUBA Corporation

Inventor： Hiroyuki Uchimura ,  Kyohei Ishikawa ,  Yuta Nishino ,  Hiroki Aikyo

IPC: F16H57/02 ,  H02K7/10 ,  F16H1/04 ,  B29D15/00 ,  B21K1/06 ,  F16H57/039 ,  F16H1/16 ,  H02K7/116 ,  B21K1/10 ,  F16C3/02 ,  F16H57/021

Abstract: Provided are a motor device and a method for manufacturing the same that can accurately and consistently provide a support shaft to a case and enhance the strength for fixing the support shaft to the case. A small-diameter part having a smaller diameter than a large-diameter part is formed through drawing. The large-diameter part and a step part are embedded in a gear case. The small-diameter part is exposed outside the gear case. The dimensional accuracy (dimensional tolerance ±α) of the external diameter of the small-diameter part is enhanced. The small-diameter part can be set, without rattling, in a lower mold for molding the gear case. Consequently, the support shaft can be accurately and consistently provided to the gear case. Because the large-diameter part and the step part are embedded in the gear case, the resistance of the support shaft against pulling from the gear case can be enhanced.