Electromagnetic clutch and manufacturing method thereof

摘要

An end surface portion of a rotor includes a friction surface and an end surface, which are spaced from each other in an axial direction. The armature is attracted and attached to the friction surface of the rotor by an electromagnetic attractive force when a solenoid coil is energized. The stator is opposed to the end surface of the end surface portion. A thermal fuse is held by a portion of a resin member located in an opening of the stator and is melted and disconnected to cut supply of an electric current to the solenoid coil when a temperature of the thermal fuse is equal to or higher than a predetermined temperature. The resin member has a recess that is formed in a predetermined position of a surface of the resin member, which is adjacent to the thermal fuse.

主权项

1. An electromagnetic clutch comprising:
an electromagnetic coil that generates an electromagnetic attractive force when the electromagnetic coil is energized; a rotor that is rotated about a rotational center axis when the rotor receives a rotational drive force from a drive source, wherein the rotor includes a first surface and a second surface, which are spaced away from each other in an axial direction of the rotational center axis, and the first surface and the second surface extend in a direction perpendicular to the axial direction; an armature that is connectable with a rotatable shaft of a driven-side device, wherein the armature is attracted and attached to the first surface of the rotor by the electromagnetic attractive force when the electromagnetic coil is energized, and the armature is detached from the first surface of the rotor when the electromagnetic coil is not energized; a stator that is opposed to the second surface of the rotor in the axial direction and forms a space between the stator and the second surface, wherein the stator has an opening on a side wherein the second surface is located, and the stator receives the electromagnetic coil in an inside space of the stator, which is communicated with the opening; a resin member that closes the opening of the stator and seals the electromagnetic coil in the inside space of the stator; and a thermal fuse that is held by a portion of the resin member located in the opening of the stator and is melted and disconnected to cut supply of an electric current to the electromagnetic coil when a temperature of the thermal fuse is equal to or higher than a predetermined temperature; and the resin member has a recess that is formed in a predetermined position of a surface of the resin member, which is adjacent to the thermal fuse and is located on the side where the second surface is placed.