公开(公告)号：EP3795851A1

公开(公告)日：2021-03-24

申请号：EP19803099.1

申请日：2019-03-20

申请人： Alps Alpine Co., Ltd.

发明人： KOIKE, Asuka ,  TAKAHASHI, Misuzu ,  TAKAHASHI, Kazunari ,  TOMIYAMA, Tatsuhiro

IPC分类号： F16D37/02 ,  F16D63/00 ,  F16F9/53

摘要： A torque generation apparatus of the present invention suitable for size reduction and capable of providing a large shearing force includes a magnetic viscous fluid placed between a magnetic disc and a first yoke and a second yoke, a coil disposed so as to overlap with the magnetic disc as viewed in a direction along a first direction, and a third yoke that constitutes a magnetic path of a magnetic field generated by the coil together with the first yoke and the second yoke. The magnetic disc includes a torque increasing portion at at least one of a surface facing the first yoke and a surface facing the second yoke. The torque increasing portion is provided in an outer circumferential area of the magnetic disc in a second direction, which is a radial direction perpendicular to the first direction, and causes a shearing force to a cluster of the magnetic viscous fluid to become larger than that in an inner circumferential area inside the outer circumferential area. The third yoke has a magnetic gap with the first yoke. The magnetic gap is formed at a position outside the outer circumferential edge of the magnetic disc or overlapping with the outer circumferential edge of the magnetic disc as viewed along the first direction.