公开(公告)号：US20210269118A1

公开(公告)日：2021-09-02

申请号：US17259188

申请日：2019-02-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masato NISHIMORI ,  Masafumi KAWAKAMI ,  Ryohei ADACHI ,  Fuhito UMEGAKI ,  Takehiro YAMAGUCHI

IPC: B62M6/55 ,  H02K7/08 ,  H02K7/116 ,  H05K7/20 ,  H02K11/33

Abstract: A motor unit for use in electric bicycles, the motor unit comprising: a motor having a rotary shaft; a unit case to house the rotary shaft partially; an input shaft arranged in the unit case to penetrate through the unit case and to be rotatable around an axis; an input body configured to rotate along with the input shaft; an output body configured to rotate around the axis upon receiving rotational force of the input body; and a control board housed in the unit case and configured to control rotation of the motor. The unit case includes: a first heat dissipating portion connected to a first surface of the control board; and a second heat dissipating portion connected to a second surface opposite from the first surface of the control board.