公开(公告)号：US09835205B2

公开(公告)日：2017-12-05

申请号：US15124050

申请日：2015-03-09

Applicant: DENSO CORPORATION

Inventor： Keiji Ishikawa ,  Takayuki Hirose ,  Yoshiki Tada

IPC: F16D13/76 ,  F16D27/112 ,  F16D3/76

CPC classification number: F16D13/76 ,  F16D3/76 ,  F16D27/112

Abstract: In an electromagnetic clutch, a rotor includes a cover portion that covers a radially outer end of an armature from a radially outer side. The cover portion, the radially outer end of the armature, and a wall of the rotor define a discharge passage that is formed into a ring shape centered on a rotating shaft and is open on a first end side in an axis line direction for discharging abrasion powder generated by friction between walls. The cover portion includes a tapered surface that is shaped such that an area in a cross sectional plane of the discharge passage which is orthogonal to an axis of the rotating shaft becomes larger toward the first end side in the axis line direction.