A steering transmission for an electro-mechanical steering system for a vehicle includes an electric motor, a servo transmission, and an angle transmission for connecting a steering column of the steering system to a control stalk of the steering system. The angle transmission is a mechanically driven recirculating-ball transmission with a ball nut, which is engaged with a segment shaft of the steering transmission that is/can be connected to the steering stalk. A spindle of the recirculating-ball transmission is continuous. The spindle is connected to an output shaft of the servo transmission on one side. The servo transmission is/can be driven by the electric motor.

A rack and pinion steering system for a motor vehicle may include a pinion shaft that is connected to a steering shaft and has a steering pinion that is engaged with a rack mounted in a steering gear housing such that the rack can be displaced along a longitudinal axis for pivoting steerable wheels. The steering shaft, the pinion shaft with the steering pinion, and the step-down gear mechanism may be received in the steering gear housing. The rack and pinion steering system may further include an electric motor that drives the pinion shaft via a step-down gear mechanism. The step-down gear mechanism may be arranged at an end of the pinion shaft that is remote from the steering shaft.

An apparatus for introducing an auxiliary torque and/or an additional steering angle into a steering shaft of an electromechanical power steering system may comprise a gearwheel that is attached fixedly on the steering shaft so as to rotate with the steering shaft and that is operatively connected to a drive element of a drive motor for driving the gearwheel. The apparatus may further include a sensor that is connected fixedly to the steering shaft so as to rotate with the steering shaft. So that the attachment of the sensor can take place with less complexity and use less installation space as far as possible, the sensor and the gearwheel may be connected to one another at contact faces.

A dual-pinion electric power steering device has: a rack shaft that causes a turnable member to turn; a first pinion shaft to which a steering force from a steering wheel is transmitted; a first rack teeth disposed on the rack shaft and capable of meshing with the first pinion shaft; a second pinion shaft to which a rotational driving force from an assist motor is transmitted; a second rack teeth disposed on the rack shaft and capable of meshing with the second pinion shaft; a first pressing member disposed across the rack shaft from the first pinion shaft and configured to press the rack shaft toward the first pinion shaft; and a second pressing member disposed across the rack shaft from the second pinion shaft and configured to press the rack shaft toward the second pinion shaft. The first pressing member has a lower rigidity than the second pressing member.

A rotor coupling assembly for a power steering assist mechanism includes a rotor coupling having a first axial side and a second axial side. The rotor coupling assembly also includes a first rotor coupling adapter having a plurality of teeth extending into a corresponding plurality of windows defined by the rotor coupling on the first axial side of the rotor coupling. The rotor coupling assembly further includes a second rotor coupling adapter having a plurality of teeth extending into a corresponding plurality of windows defined by the rotor coupling on the second axial side of the rotor coupling.

A rack and pinion steering system for a motor vehicle may include a pinion shaft that is connected to a steering shaft and includes a steering pinion that is engaged with a rack that is mounted in a gear housing such that the rack can be displaced along a longitudinal axis for pivoting steerable wheels. The rack and pinion steering system may also include an electric motor that drives the pinion shaft via a step-down gear mechanism. An overall arrangement of the rack, the pinion shaft, and the step-down gear mechanism may be received in the gear housing. Further, the gear housing may be a single-piece gear housing.

Provided is a motor-driven power steering system including: a motor driver; and a controller, wherein the controller is configured to: receive a first rotation angle obtained by a steering wheel angle sensor according to steering and a second rotation angle obtained by a motor position sensor, when a steered position of the steering wheel is in an auxiliary steering limit section and a difference value between the first rotation angle and the second rotation angle is different from a predetermined reference value, change a rotation position of the steering wheel angle sensor and a rotation position of the motor position sensor to an initial original position, when changed to the initial original position, receive the first rotation angle and the second rotation angle again, and control the motor driver to perform auxiliary steering based on the first rotation angle and the second rotation angle received again.

A steering gear apparatus for a steer-by-wire steering system of a motor vehicle has a sliding rod, which has a rack with a toothing, a gear section, which has a worm gear with a worm wheel and a drive pinion extending in an axial direction (A), a motor and a steering angle sensor. The motor is connected here to the drive pinion via the worm gear so as to transmit torque, and the drive pinion is in toothed engagement with the toothing. The steering angle sensor is coupled here to the drive pinion, in particular so as to transmit torque.

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 power actuator assembly for a steering column assembly is provided. The power actuator assembly include an electric motor. Also included is a leadscrew. Further included is a gear arrangement operatively coupled to the electric motor, the gear arrangement driving rotation of the leadscrew. Yet further included is a nut threaded to the leadscrew, rotation of the leadscrew actuating linear motion of the nut relative to the leadscrew, the nut operatively coupled to a moveable portion of the steering column assembly to actuate motion of the moveable portion. Also included is a leadscrew housing, the leadscrew extending axially through the leadscrew housing. Further included is a helical bushing disposed between a radially inner surface of the leadscrew housing and a radially outer surface of the leadscrew.