Jtekt Corporation

Denso Corporation

Koyo Seiko Company, Ltd.

Takeshi Izumi

Naoki Nakane

Yoshitomo Tokumoto

Toshiharu Ishihara

Tetsuya Murakami

Norio Nakatani

Souichi Iwasa

Taisuke Tsujimoto

Takashi Kaoku

A detecting unit for detecting a torque applied to a rotor according to rotation of the rotor having an input shaft and an output shaft connected with each other by a torsion bar and a detection circuit board connected with the detecting unit are molded with synthetic resin material to form a mold member. The installation of the mold member into a housing, which has a cylinder portion to surround the rotor and a retainer having an opening formed at the peripheral wall of the cylinder portion, is achieved by inserting the mold member into the retainer from the radial direction through the opening of the retainer.

Torque detecting apparatus and manufacturing method thereof

A torque detecting apparatus according to the present invention includes a first shaft and a second shaft connected coaxially to each other through a connecting shaft, a permanent magnet fixed to the first shaft, a plurality of soft magnetic members having a collar provided therein, fitted by pressing with the second shaft and disposed in a magnetic field of the permanent magnet to form a magnetic circuit, and a detector for detecting magnetic flux generated from the soft magnetic members, wherein the soft magnetic members are integrally molded with a mold body made of synthetic resin, and when a torque is applied to the first shaft or the second shaft, the torque is detected based on an output of the detector. The collar is made of a non-magnetic material.

Torque detecting apparatus and electric power steering apparatus

A sensor coil serving as a sensor unit fitted and retained in a sensor retaining hole of a sensor housing and a circuit board stored in a board chamber provided inside the sensor housing are integrated by coating the outer surface of a lead and the circuit board with a resin layer formed by resin molding performed under the condition in which the sensor coil and the circuit board are connected with the lead. As a result, mounting of the sensor unit and the circuit board of a torque detecting apparatus in the housing is facilitated, the reliability of the connection part of the sensor unit and the circuit board is increased, and occurrence of connection defects due to the function of external force is prevented.

Torque detecting apparatus

A sensor coilserving as a sensor unit fitted and retained in a sensor retaining holeof a sensor housingand a circuit boardstored in a board chamberprovided inside the sensor housingare integrated by coating the outer surface of a leadand the circuit boardwith a resin layerformed by resin molding performed under the condition in which the sensor coiland the circuit boardare connected with the lead. As a result, mounting of the sensor unit and the circuit board of a torque detecting apparatus in the housing is facilitated, the reliability of the connection part of the sensor unit and the circuit board is increased, and occurrence of connection defects due to the function of external force is prevented.

Electric power steering system

Growing community of inventors

Kashiwara, Japan

Takeshi Izumi