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1. (WO2018034247) ELECTRIC MOTOR DEVICE

Pub. No.:    WO/2018/034247    International Application No.:    PCT/JP2017/029170
Publication Date: Fri Feb 23 00:59:59 CET 2018 International Filing Date: Fri Aug 11 01:59:59 CEST 2017
IPC: H02K 7/12
H02K 7/06
H02K 16/04
Applicants: NTN CORPORATION
NTN株式会社
Inventors: MASUDA, Yui
増田 唯
Title: ELECTRIC MOTOR DEVICE
Abstract:
Provided is an electric brake device that includes a reverse input holding means, said electric brake device being capable of achieving reduction in space, the number of components, and cost. In normal rotating operation by a rotor (8), the axial position of the rotor (8) is held, and the rotor (8) is freely rotatable with respect to a stator (7). When a parking brake switch is operated in the state in which a vehicle is stopped, the rotor (8) is slid to one side in the axial direction by a rotor sliding means against a load given by an axial preloading means (54). As a result, an engagement portion (55) of the rotor (8) and a portion to be engaged (56) of a housing (4) are engaged with each other. In the engaged state, the reverse input holding means holds a rotation angle of the rotor (8), with the engaged state between the engagement portion (55) and the portion to be engaged (56) being maintained with respect to a load of reverse input acting as external force on the rotor (8) along with reaction force of pressing force of a brake friction member.