Abstract: A column-assist type electric power steering device (10) is provided with: a steering shaft (22); a magnetostrictive type torque sensor (80) that detects a torque produced in the steering shaft (22); and bearings (64, 65) that rotatably support the steering shaft (22). The magnetostrictive type torque sensor (80) includes a magnetostrictive film (81) disposed on an outer peripheral surface of the steering shaft (22), and a detection unit (83) that is disposed opposite the magnetostrictive film (81) and that detects a change in permeability. The bearings (64, 65) are installed at two locations in the axial direction of the steering shaft (22) in such a manner as to sandwich the detection unit (83).

Abstract: A power steering apparatus for a vehicle includes a column shaft, a column pipe rotatably supporting the column shaft through a plurality of bearings, and a torque sensor for detecting torque generated on the column shaft by using magnetism. The column pipe is composed of a steel pipe. The torque sensor includes a magnetically variable portion and a magnetic change detector. The magnetically variable portion is disposed on the column shaft and has a magnetic permeability that varies with the torque generated on the column shaft. The magnetic change detector is configured to detect a change in the magnetism of the magnetically variable portion. The magnetic change detector is attached to the column pipe by being inserted in an axial direction through an opening at an axial end of the column pipe.

Abstract: A column-assist type electric power steering device (10) is provided with: a steering shaft (22); a magnetostrictive type torque sensor (80) that detects a torque produced in the steering shaft (22); and bearings (64, 65) that rotatably support the steering shaft (22). The magnetostrictive type torque sensor (80) includes a magnetostrictive film (81) disposed on an outer peripheral surface of the steering shaft (22), and a detection unit (83) that is disposed opposite the magnetostrictive film (81) and that detects a change in permeability. The bearings (64, 65) are installed at two locations in the axial direction of the steering shaft (22) in such a manner as to sandwich the detection unit (83).

Abstract: A power steering apparatus for a vehicle includes a column shaft, a column pipe rotatably supporting the column shaft through a plurality of bearings, and a torque sensor for detecting torque generated on the column shaft by using magnetism. The column pipe is composed of a steel pipe. The torque sensor includes a magnetically variable portion and a magnetic change detector. The magnetically variable portion is disposed on the column shaft and has a magnetic permeability that varies with the torque generated on the column shaft. The magnetic change detector is configured to detect a change in the magnetism of the magnetically variable portion. The magnetic change detector is attached to the column pipe by being inserted in an axial direction through an opening at an axial end of the column pipe.

Abstract: A shock absorbing device for a rack and pinion type steering device includes a rack shaft, a rack housing, a stopper portion formed in an end part of the rack shaft, a stopper engaging portion provided on the rack housing to define a stroke end position for the rack shaft by engaging the stopper portion, a stepped portion formed on the rack shaft, a shoulder portion formed in an enlarged diameter portion of the rack housing, and a cylindrical elastic member fitted on the rack shaft such that the elastic member is pressed in the axial direction of the rack shaft by the stepped portion and the shoulder portion. The elastic member is formed with grooves on each of an outer circumferential surface and an inner circumferential surface thereof. Such shock absorbing device for a rack and pinion type steering device has a high shock absorbing capability.

Abstract: In an electric power steering apparatus, an elastic member, disposed between the steering shaft and the housing, configured to be elastically deformed in accordance with rotation or displacement in a vehicle width direction, of the steering shaft. At least two bearings, disposed with a gap in an axial direction of the steering shaft, are configured to support the steering shaft. The elastic member is disposed between the bearings. A supporting member may be disposed between the steering shaft and the elastic member and configured to be displaced by a rotation of a predetermined angle or predetermined distance in accordance with the rotation or a displacement, in the width direction of the vehicle, of the steering shaft with slidable support for the steering shaft. The elastic member is fixed to the supporting member and abuts the housing.

Abstract: A shock absorbing device for a rack and pinion type steering device includes a rack shaft, a rack housing, a stopper portion formed in an end part of the rack shaft, a stopper engaging portion provided on the rack housing to define a stroke end position for the rack shaft by engaging the stopper portion, a stepped portion formed on the rack shaft, a shoulder portion formed in an enlarged diameter portion of the rack housing, and a cylindrical elastic member fitted on the rack shaft such that the elastic member is pressed in the axial direction of the rack shaft by the stepped portion and the shoulder portion. The elastic member is formed with grooves on each of an outer circumferential surface and an inner circumferential surface thereof. Such shock absorbing device for a rack and pinion type steering device has a high shock absorbing capability.

Abstract: In an electric power steering apparatus, an elastic member, disposed between the steering shaft and the housing, configured to be elastically deformed in accordance with rotation or displacement in a vehicle width direction, of the steering shaft. At least two bearings, disposed with a gap in an axial direction of the steering shaft, are configured to support the steering shaft. The elastic member is disposed between the bearings. A supporting member may be disposed between the steering shaft and the elastic member and configured to be displaced by a rotation of a predetermined angle or predetermined distance in accordance with the rotation or a displacement, in the width direction of the vehicle, of the steering shaft with slidable support for the steering shaft. The elastic member is fixed to the supporting member and abuts the housing.