Ogura Clutch Company, Ltd.

Ntn Corporation

Haruhiko Ushirode

Yoshihiro Kurosu

Koji Sato

Takahide Saito

Naotsugu Kitayama

Takashi Mitsuhashi

Takashi Yamaguchi

Motoi Kato

Takeharu Murakami

An electromagnetic connection device includes an armature (), a rotor (), an electromagnetic coil (), and a spring member () that biases the armature () in a direction in which the armature () is separated from the rotor (). The electromagnetic connection device includes a damping member () mounted on the armature () so as to face the rotor (). The armature () includes a flat portion () and a tubular portion (). The damping member () includes a damper cover () including an abutment portion along the flat portion () and an engaging portion along the tubular portion (), and an elastic member () sandwiched between the abutment portion and the flat portion (). The damper cover () is put on the armature () from the side of the rotor () and movably held on the tubular portion (). The flat portion () includes a concave portion () configured to store the abutment portion of the damper cover (). There is provided an electromagnetic connection device capable of obtaining a high damping effect and raising the productivity while preventing the elastic member from being exposed to a friction surface.

Electromagnetic connection device

A seal structure for an electromagnet lead wire includes an annular yoke including an annular groove, a wiring hole configured to pass a lead wire of an exciting coil, an insulating resin configured to seal the exciting coil, and a seal member arranged in the hole. The wiring hole includes a though hole of a case, and a concave portion of the yoke. The insulating resin includes a projecting portion whose distal end face is located in the concave portion. The seal member includes a columnar portion inserted into the though hole, and a flange portion located in the concave portion. The flange portion is sandwiched and compressed between the device inner surface of the case and the distal end face of the insulating resin.

Seal structure for electromagnetic lead wire

An electromagnetic clutch includes a rotor, armature hub, armature, magnetic body and first permanent magnet, field core, excitation coil, and second permanent magnet. The rotor is rotatably disposed in the housing of a driven device. The armature hub is fixed to the rotating shaft of the driven device, the armature movable in an axial direction. The magnetic body is incorporated in the rotor. The first permanent magnet connects the armature to the rotor. The field core is attached to the housing and inserted in the rotor to be in noncontact with it. The excitation coil is disposed in the field core and excited, when cutting off power transmission, to cancel a magnetic force of the first permanent magnet, thus releasing the armature from the first permanent magnet. The second permanent magnet separates the armature from the rotor, when cutting off power transmission, to move the armature toward the armature hub.

Electromagnetic clutch

An electric fuel pump includes a pump unit, motor unit, fuel discharge unit, stator holder, magnet wire, connection terminal, first mold resin, driver board assembly, and second mold resin. The fuel discharge unit includes a discharge port member and discharges fuel supplied from the pump unit through the motor unit. The stator holder is provided to the motor unit and includes a partition which defines the motor unit and the fuel discharge unit. The partition includes a terminal insertion hole and a fuel passage. The connection terminal is connected to the magnet wire. The driver board assembly is stored in a space formed in the discharge port member and electrically connected to the connection terminal. The second mold resin molds the driver board assembly and a connecting portion where the driver board assembly is connected to the connection terminal.

Growing community of inventors

Gunma, Japan

Haruhiko Ushirode