公开(公告)号：US10968963B2

公开(公告)日：2021-04-06

申请号：US16349134

申请日：2017-10-10

Applicant: SANDEN AUTOMOTIVE COMPONENTS CORPORATION

Inventor： Yuki Sakamoto

IPC: F16D27/112 ,  F16D27/14 ,  F16D27/10 ,  F16D27/00

Abstract: Provided is an electromagnetic clutch capable of shortening, even in a low temperature atmosphere, the fuse reaction time from when a rotating shaft is locked, while preventing or suppressing malfunction of the thermal fuse. An electromagnetic clutch 1 is equipped with a rotor 2, an armature 3, an electromagnetic coil unit 4, a thermal fuse 5, and a thermally actuated switch 6. The thermally actuated switch 6 is connected in series to an electromagnetic coil 41 of the electromagnetic coil unit 4 along with the thermal fuse 5. When a temperature of the thermally actuated switch 6 exceeds a switching temperature (predetermined temperature) Ts, the thermally actuated switch 6 is displaced in an electric power supply OFF direction, and thereafter, it is displaced in an electric power supply ON direction due to a reduction in temperature. The thermally actuated switch 6 turns ON/OFF the electric power supply to the electromagnetic coil 41 such that the thermal fuse vicinity temperature T1 does not exceed the operational temperature Tf of the thermal fuse 5 due to self-heating of the electromagnetic coil 41 itself generated by the electric power supplied to the electromagnetic coil 41, thereby preventing malfunction of the thermal fuse 5 due to self-heating of the electromagnetic coil 41.