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    Brush for an electric motor
    4.
    发明授权
    Brush for an electric motor 有权

    公开(公告)号：US09905983B2

    公开(公告)日：2018-02-27

    申请号：US14976624

    申请日：2015-12-21

    申请人： Johnson Electric S.A.

    发明人： Fa Yun Qi ,  Shu Dan Zhao ,  Cheng Shun Du ,  Rui Feng Qin

    IPC分类号： H02K13/00 ,  H01R39/26

    CPC分类号： H01R39/26 ,  H02K13/006

    摘要： A brush for an electric motor has a brush body having a front end surface configured to make sliding electrical contact with a commutator of the motor. First and second side surfaces are connected to the front end surface. The first side surface and the second side surface are positioned on opposite sides of the brush body in a rotational direction of the commutator. The front end surface has a first contact surface and a second contact surface that contact the commutator earlier than other regions of the front end surface, and are respectively positioned on diametrically opposed corners of the front end surface. In an initial state, the width of the contact area between the brush and the commutator is increased to extend the commutation time.