A torque transmission joint to suppress occurrence of noise when reversing the direction of rotation of a drive shaft. A first transmission member fixed to an output shaft (the drive shaft) is engaged with a first elastic member such that a first gap in a circumferential direction is interposed, as well as with an intermediate transmission member such that a larger gap in the circumferential direction is interposed. A second transmission member fixed to an end portion of a worm is engaged with a second elastic member such that a second gap in the circumferential direction is interposed, as well as with the intermediate transmission member such that a larger gap in the circumferential direction is interposed. First and second annular convex portions are fitted to, respectively, first and second concave portions to prevent separation of the first and second elastic members with respect to the intermediate transmission member.

One embodiment of the present invention relates to a steering apparatus, in which not only a middle tube but also an inner tube can be moved along a longitudinal direction of an outer tube, and thus, stroke control of the steering apparatus can be effectively performed. Specifically, in the steering apparatus, the speed reducer is supported by a first transport guide and a second transport guide, moves along the first transport guide according to power of a motor, and can effectively rotate the second transport guide.

An apparatus for use in turning at least one steerable vehicle wheel includes a steering member rotatably supported in a housing. The steering member rotates relative to the housing about a first axis to effect turning movement of the at least one steerable vehicle wheel. A ball nut is connected with an externally threaded portion of the steering member. The steering member is rotatable relative to the ball nut assembly to axially move the ball nut assembly relative to the housing. An electric motor is operable to apply a rotational force to the steering member to urge the steering member to rotate relative to the housing. The electric motor has an output shaft extending along a second axis extending generally parallel to the first axis. A first gear is rotatable about the second axis with the output shaft of the motor. A second gear in meshing engagement with the first gear is rotatable about a third axis extending transverse to the second axis. A third gear is rotatable with the second gear about the third axis. A fourth gear in meshing engagement with the third gear is rotatable with the steering member relative to the housing.

An apparatus for use in turning steerable vehicle wheels includes a rotatable output shaft. A first rotational input assembly is provided for transmitting a steering command from a steering control member to the output shaft. A power transmitting mechanism is configured to transmit the rotational force from the input assembly to the output shaft. The power transmitting mechanism includes a plurality of sector gears. A ball screw has longitudinally separated first and second ball screw ends. A ball nut has a plurality of rack gears. Rotational force from the input assembly turns the ball screw, and the ball nut reciprocates within the housing responsive to rotation of the ball screw to move each of the plurality of rack gears in a longitudinal direction. Longitudinal motion of the rack gear teeth responsively drives the sector gear teeth to transmit the steering command to the output shaft.

Reducer device having electric power steering, including a support member, an endless screw, a toothed wheel that meshes with a helical spline arranged on the endless screw, the endless screw including a first end capable of being rotated, and a second end receiving a first rotation-guiding means and a second rotation-guiding means, respectively, causing the endless screw to pivot relative to the support member, the second rotation-guiding means including a damping sleeve and a rotation-guiding device, the sleeve surrounding the rotation-guiding device, the second rotation-guiding means including a centering means including a press-fitting part inserted into the rotation-guiding device, and an attachment part rigidly connected to the support member.

An object of the present invention is to provide a rotational angle detection apparatus and a power steering apparatus capable of detecting a rotational angle of a rotational shaft eve when a failure has occurred in a magnetic detection portion. One aspect of the present invention is a rotational angle detection apparatus including a first magnetic detection portion provided on a rotational axis and configured to detect a change in a magnitude or a direction of a magnetic field, and a second magnetic detection portion provided on the rotational axis and disposed at a position offset from the first magnetic detection portion in a direction along the rotational axis. The second magnetic detection portion is configured to detect the change in the magnitude or the direction of the magnetic field. The rotational angle detection apparatus further includes a magnet provided on an outer side in a radial direction of the rotational axis with respect to the first magnetic detection portion and the second magnetic detection portion and disposed in such a manner that an N-pole and an S-pole face each other around the rotational axis. The magnet is provided rotatably relative to the first magnetic detection portion and the second magnetic detection portion. The rotational angle detection apparatus is configured to detect a rotational angle of the magnet relative to the first magnetic detection portion and the second magnetic detection portion based on signals output from the first magnetic detection portion and the second magnetic detection portion.

The disclosure describes a housing cover unit for a transmission and power steering drive housing, comprising a housing cover and a control unit for regulating the position and/or speed of a power steering drive. To this end, the control unit is arranged on and attached to the housing cover. Also shown is a steering unit for a vehicle.

An electric power steering device includes a composite metal member. The composite metal member is formed by laminating a plurality of metal plates that have different thermal expansion coefficients. The composite metal member is capable of causing a worm shaft to oscillate and be displaced away from a worm wheel on the basis of deformation of the composite metal member if the temperature thereof has become higher than a reference temperature. The composite metal member is also capable of causing the worm shaft to oscillate and be displaced towards the worm wheel on the basis of deformation of the composite metal member if the temperature thereof has become lower than the reference temperature.

A steer-by-wire steering device includes a first member, a second member, and a stopper. The first member includes a first base surrounding an input shaft and rotatable, a first protrusion protruding from the first base in a radial direction or in an axial direction, and a first weight provided on the first base so as to make a weighted center consistent with a center of the input shaft. The second member is rotatable together with the first member with the first protrusion being abutting the second protrusion. The stopper is provided on a trajectory of the second protrusion, and is capable of restricting the turn of a steering wheel via the input shaft when abutting with the second protrusion.

An angle superimposition apparatus for a vehicle steering device with a planetary gear. The apparatus includes—a first shaft and a second shaft, which are arranged in a longitudinal direction so as to be rotatable relative to one another about the common longitudinal axis thereof. —A carrier arrangement is fixedly arranged to the body shell, on which carrier arrangement the first shaft and the second shaft and a rotor shaft are at least partially mounted and positioned so as to be rotatable. —An auxiliary drive with a stator is arranged on the carrier arrangement and with a rotor shaft, having a rotor, mounted rotatably and arranged coaxially with respect to the longitudinal axis and one of the shafts. —A planetary gear having a worm, which is arranged as a sun wheel so as to be rotatable about an axis of rotation and is arranged on the rotor shaft.