Steering apparatus for vehicle
AssigneesFuji Kiko Co., Ltd., Jtekt Corporation
InventorsTadao Ito, Akira Osanai, Kenji Higashi
Life of this patent
Estimating the term…
Abstract
A steering apparatus for a vehicle capable of executing a steer-by-wire (SBW) mode of steering road wheels by a steering mechanism mechanically disconnected with a steering device. The steering apparatus includes a clutch which is composed of a shaft rotated together with the steering device, an internal gear ring which has a rotation center coincide with that of the shaft and transmits its rotation to the steering mechanism, an external gear ring partially intermeshed with the internal gear ring, lock members which transmit/disconnect the rotation of the shaft to the external gear, and a lock operating member for displacing the lock members to lock/unlock positions.
Claims8
A steering apparatus for a vehicle capable of steering road wheels by a steering mechanism mechanically disconnected with a steering device, the apparatus comprising a clutch capable of mechanically connecting the steering device and the steering mechanism, wherein
- the clutch includes:
- a shaft which is rotated by operating force onto the steering device and has a rotating protrusion rotated integrally;
- an internal gear ring which is rotatable around a center axis of the shaft as a rotation center, has internal teeth on an inner circumference, and is mechanically connected to the steering mechanism;
- an external gear ring which is rotatable around an axis, which is eccentrically located with respect to the center axis of the shaft, is disposed between the shaft and the internal gear ring, and has external teeth partially intermeshed with the internal teeth;
- lock members which are rotated by being pushed by the rotating protrusion while the shaft is rotated, and makes the external gear ring intermeshed with the internal teeth;
- and
- a lock operating member for moving the lock members to a lock position,
- the lock member is rotated by the rotating protrusion without wedging the lock members between the external gear ring and the shaft when the lock members are not located at the lock position by the lock operating member, and
- the shaft, the lock members and the external gear ring are rotated integrally by wedging the lock members between the external gear ring and the shaft when the lock members are located at the lock position by the lock operating member.
A steering apparatus for a vehicle capable of steering road wheels by a steering mechanism mechanically disconnected with a steering device, the apparatus comprising a clutch capable of mechanically connecting the steering device and the steering mechanism, wherein
- the clutch includes an electromagnetic solenoid which performs connection/disconnection based on whether or not electromagnetic force is present,
- an electromagnetic coil of the electromagnetic solenoid is composed of a small-resistance coil and a large-resistance coil, and
- only the small-resistance coil is energized at an early phase of an energization of the electromagnetic coil, and the small-resistance coil and the large-resistance coil are energized after a predetermined time has elapsed from the energization.
A steering apparatus for a vehicle capable of steering road wheels by a steering mechanism mechanically disconnected with a steering device, the apparatus comprising a clutch capable of mechanically connecting the steering device and the steering mechanism, wherein
- the clutch includes an electromagnetic solenoid which performs connection/disconnection based on whether or not electromagnetic force is present,
- the electromagnetic solenoid includes an electromagnet which disconnects the clutch by electromagnetic force generated by energizing an electromagnetic coil, and energizes the electromagnetic coil with an opposite phase current after the energization of the electromagnetic coil has been ended.
Dependencies are inferred from the claim text.