Abstract: A steering device includes: a coupling including a first coupling member, a second coupling member, and an elastic member, the elastic member which is made from a resin, and which includes an elastic member base portion, a first rotation direction elastic portion, a second rotation direction elastic portion, a third rotation direction elastic portion, a fourth rotation elastic portion, and an axial elastic portion, the axial elastic portion which is provided to the elastic member base portion, and which is arranged to be bent in a direction to be inclined with respect to the first axis when a clearance between the first shaft member assembly and the second shaft member assembly in the direction of the first axis is decreased.

Abstract: A steering device includes: a coupling including a first coupling member, a second coupling member, and an elastic member, the elastic member which is made from a resin, and which includes an elastic member base portion, a first rotation direction elastic portion, a second rotation direction elastic portion, a third rotation direction elastic portion, a fourth rotation elastic portion, and an axial elastic portion, the axial elastic portion which is provided to the elastic member base portion, and which is arranged to be bent in a direction to be inclined with respect to the first axis when a clearance between the first shaft member assembly and the second shaft member assembly in the direction of the first axis is decreased.

Abstract: A ball bearing for rotatably supporting a steering shaft, which is comprised of an input shaft and an output shaft connected to each other via a torsion bar is secured by a lock nut. The lock nut has an inside diameter Y1 greater than a maximum outside diameter X6 of the sensor body of a torque sensor mainly configured from a permanent magnet, first and second yoke members, and a magnetic sensor, which are disposed on the outer periphery of the steering shaft. With this configuration, the torque sensor and the lock nut radially overlap with each other, thus reducing the size of a device. Also, because of the lock nut being assembled so as to pass through the outer peripheral side of the torque sensor, component parts can be installed from one direction, thus improving the assembling workability of the device.

Abstract: A rotation detecting device includes first and second members that are rotatable relative to each other around a rotation axis, a magnetic member fixed to the first member and having poles alternately arranged around the rotation axis, a detecting member arranged to face the magnetic member and made of a magnetic material, and a holding member fixed to the second member. The holding member is made of thermoplastic resin and includes first and second holding members that are welded and fixed to each other. The detecting member is disposed between the first and second holding members to prevent relative contact between the detecting member and the second member. The rotation detecting device further includes a magnetic sensor that detects relative rotation between the first and second members by sensing a change of magnetic field in the detecting member due to the relative rotation.

Abstract: Torque sensor has: magnetic member; first yoke member having (a) first nail portions arranged concentrically to face the magnetic member in radial direction and (b) first ring portion; second yoke member having (c) second nail portions arranged concentrically so that the first and second nail portions are circumferentially alternately arranged and the second nail portions face the magnetic member in radial direction and (d) second ring portion; first magnetic flux concentration ring provided between the first and second ring portions; second magnetic flux concentration ring provided between the second ring portion and the first magnetic flux concentration ring; and magnetic sensor. The first and second magnetic flux concentration rings and the first and second ring portions are arranged in layers in radial direction. A part or all of axial direction area of the first and second magnetic flux concentration rings is surrounded and shielded by the second ring portion.

Abstract: A welding plate 29 and a yoke holder 23 are welded and fixed to each other having a pair of yokes 21 and 22 put therebetween.

Abstract: A steering angle sensor for a vehicle including a steering angle sensor housing, a first gear, a rotation transmitting portion, a second gear meshing with the first gear, a third gear meshing with the first gear or the second gear, first and second magnetoresistance effect elements to detect first and second rotation angles as rotation angles of the second and third gears, respectively, and a biasing member disposed in the steering angle sensor housing to bias the first gear toward the second gear, wherein the first and rotation angles are combined to determine an absolute steering angle indicative of an amount of rotation of a steering wheel when the steering wheel is rotated from a neutral position in which a steerable road wheel is oriented to a straight ahead direction of the vehicle.

Abstract: A ball bearing for rotatably supporting a steering shaft, which is comprised of an input shaft and an output shaft connected to each other via a torsion bar is secured by a lock nut. The lock nut has an inside diameter Y1 greater than a maximum outside diameter X6 of the sensor body of a torque sensor mainly configured from a permanent magnet, first and second yoke members, and a magnetic sensor, which are disposed on the outer periphery of the steering shaft. With this configuration, the torque sensor and the lock nut radially overlap with each other, thus reducing the size of a device. Also, because of the lock nut being assembled so as to pass through the outer peripheral side of the torque sensor, component parts can be installed from one direction, thus improving the assembling workability of the device.

Abstract: A steering angle sensor 17 is provided which can minimize a detection error even when a steering shaft 6 is inclined. In an annular clearance t1 defined between the steering shaft 6 and an inner cylindrical wall of a first gear 24, there is compressed an elastic O-ring 23. Due to provision of the elastic O-ring 23, inclination of the steering shaft 6, which tends to occur during handling of a steering wheel 1, is suitably absorbed by the elastic O-ring 23, and thus, generation of detection error caused by inclination of the first gear 24, which would follow the inclination of the steering shaft 6, is suppressed or at least minimized.

Abstract: Torque sensor detects torque of steering shaft formed by first and second shafts which are connected through torsion bar. Torque sensor has: a magnetic member provided at the first shaft and having magnetic poles alternately arranged in circumferential direction concentrically with rotation axis; a first yoke member provided at the second shaft and having (a) first nail portions arranged concentrically with the rotation axis and facing the magnetic member in radial direction and (b) a first ring portion; a second yoke member provided at the second shaft and having (c) second nail portions arranged concentrically with the rotation axis so that the first and second nail portions are alternately arranged in the circumferential direction and the second nail portions face the magnetic member in the radial direction and (d) a second ring portion arranged to be separated from and face the first ring portion; and a magnetic sensor.

Abstract: A steering angle sensor 17 is provided which can minimize a detection error even when a steering shaft 6 is inclined. In an annular clearance t1 defined between the steering shaft 6 and an inner cylindrical wall of a first gear 24, there is compressed an elastic O-ring 23. Due to provision of the elastic O-ring 23, inclination of the steering shaft 6, which tends to occur during handling of a steering wheel 1, is suitably absorbed by the elastic O-ring 23, and thus, generation of detection error caused by inclination of the first gear 24, which would follow the inclination of the steering shaft 6, is suppressed or at least minimized.

Abstract: A steering angle sensor for a vehicle including a steering angle sensor housing, a first gear, a rotation transmitting portion, a second gear meshing with the first gear, a third gear meshing with the first gear or the second gear, first and second magnetoresistance effect elements to detect first and second rotation angles as rotation angles of the second and third gears, respectively, and a biasing member disposed in the steering angle sensor housing to bias the first gear toward the second gear, wherein the first and rotation angles are combined to determine an absolute steering angle indicative of an amount of rotation of a steering wheel when the steering wheel is rotated from a neutral position in which a steerable road wheel is oriented to a straight ahead direction of the vehicle.

Abstract: A power steering system having a housing having first and second housing sections, a steering shaft rotatably housed in the housing, a sensor coil, a coil bobbin having a coil holding part and a flange part and housed in the first housing section, a first held section provided at the flange part, a sensor board housed in the housing, a second held section provided at the sensor board, first and second riveting portions provided at the first housing section, and an electric motor. The first riveting portion fixes the coil bobbin to the first housing section by melting and deforming the first riveting portion with the first held section touching the first riveting portion. The second riveting portion fixes the sensor board to the first housing section by melting and deforming the second riveting portion with the second held section touching the second riveting portion.

Abstract: A power steering system having a housing having first and second housing sections, a steering shaft rotatably housed in the housing, a sensor coil, a coil bobbin having a coil holding part and a flange part and housed in the first housing section, a first held section provided at the flange part, a sensor board housed in the housing, a second held section provided at the sensor board, first and second riveting portions provided at the first housing section, and an electric motor. The first riveting portion fixes the coil bobbin to the first housing section by melting and deforming the first riveting portion with the first held section touching the first riveting portion. The second riveting portion fixes the sensor board to the first housing section by melting and deforming the second riveting portion with the second held section touching the second riveting portion.