Jtekt Corporation

Yamasei Kogyo Co., Ltd.

Yusuke Matsui

Kensaku Hotta

Fumihiko Mizutani

Kunio Yamazaki

A torque detection apparatus includes a magnetic element that outputs a signal corresponding to a magnetic flux from a magnetic circuit including a magnetic yoke. The torque detection apparatus further includes a signal retrieval member electrically connected to the magnetic element, and a unit housing formed of resin and molded integrally with the magnetic element and the signal retrieval member so as to cover the magnetic element and the signal retrieval member. The unit housing includes a body portion provided with an internal space in which the magnetic yoke is housed, and a connector portion provided with an internal space in which an end of the signal retrieval member exposed from the resin is disposed. In the unit housing, a communication path is formed through which the internal space is in communication with the internal space.

Torque detection apparatus

A torque sensor includes a first magnet fixed to a first shaft, a tubular magnetic yoke assembly in which a magnetic yoke core is molded with a resin member, and a first magnetic sensor that detects a magnetic flux from the first magnet induced by the magnetic yoke core. The torque sensor also includes a collar made of a ferromagnetic body that is fixed to an inner circumference of the magnetic yoke assembly and to which a second shaft is press-fitted and fixed, and a second magnet for an index sensor that is disposed on an outer circumference of the magnetic yoke assembly. At least a part of the collar is disposed between the magnetic yoke core and the second magnet with respect to an axial direction of the magnetic yoke assembly.

Torque sensor and electric power steering system

A yoke unit includes a first yoke, a second yoke, and a resin section. The first yoke includes multiple first magnetic pole teeth. The second yoke includes multiple second magnetic pole teeth. The first magnetic pole teeth and the second magnetic pole teeth are arranged alternately. The resin section makes the yokes integral with each other. The resin section includes a recessed part formed in an inner surface of the resin section. The recessed part is arranged between the first magnetic pole tooth and the second magnetic pole tooth.

Yoke unit, yoke unit manufacturing method, torque detection device, and electric power steering device

A torque detecting device includes a permanent magnet; a first magnetic yoke; a second magnetic yoke; two magnetic elements; a terminal; a case; and an external housing. The two magnetic elements are electrically connected to the terminal. The case accommodates the two magnetic elements and the terminal. The external housing accommodates the permanent magnet, the first magnetic yoke, and the second magnetic yoke, covers an outer side surface of the case, and is formed integrally with the case.

Growing community of inventors

Shiki-gun, Japan

Yusuke Matsui