A gear unit for a motor vehicle having a drive shaft extending axially and mounted rotatably, and a worm gear shaft which cooperates with a worm gear wheel. A torque-transmitting coupling connects the drive shaft to one end of the worm gear shaft with the other end supported by a bearing. A pretension element loads the bearing and correspondingly the worm gear shaft so the worm gear shaft is biased or pressed against the worm gear wheel. The torque-transmitting coupling provides a suitable connection between the drive shaft and worm gear shaft.

A position measurement system for a steering system includes a steering shaft. The position measurement system also includes a worm gear coupled to the steering shaft. The position measurement system further includes a worm in meshed engagement with the worm gear, the worm driven by a motor. The position measurement system yet further includes a first sensor operatively coupled to the worm to detect an angular position of the worm and the motor that drives the worm. The position measurement system also includes a driving gear coupled to the steering shaft. The position measurement system further includes a spur gear in meshed engagement with the driving gear. The position measurement system yet further includes a second sensor operatively coupled to the spur gear to detect an angular position of the spur gear.

A position measurement system for a steering system includes a steering shaft. The position measurement system also includes a worm gear coupled to the steering shaft. The position measurement system further includes a worm in meshed engagement with the worm gear, the worm driven by a motor. The position measurement system yet further includes a first sensor operatively coupled to the worm to detect an angular position of the worm and the motor that drives the worm. The position measurement system also includes a driving gear coupled to the steering shaft. The position measurement system further includes a spur gear in meshed engagement with the driving gear. The position measurement system yet further includes a second sensor operatively coupled to the spur gear to detect an angular position of the spur gear.

A motor-driven power steering system for a vehicle is configured such that movement of the worm shaft and a clearance caused by backlash between the worm wheel and the worm shaft may be prevented using the bearing-integrated damper bush which is coupled to the end portion of the worm shaft and is made of steel, and during of rotation of the worm shaft, the lubricant is supplied between the worm shaft and the bearing-integrated damper bush to facilitate lubrication and cooling.

A motor-driven power steering system for a vehicle is configured such that movement of the worm shaft and a clearance caused by backlash between the worm wheel and the worm shaft may be prevented using the bearing-integrated damper bush which is coupled to the end portion of the worm shaft and is made of steel, and during of rotation of the worm shaft, the lubricant is supplied between the worm shaft and the bearing-integrated damper bush to facilitate lubrication and cooling.

A coupling assembly includes a flexible coupling and a first adapter. The flexible coupling defines an opening that extends along a central longitudinal axis between a first coupling end and a second coupling end. The first adapter is arranged to be at least partially received within the opening proximate the first coupling end. The first adapter extends between a first adapter first face and a first adapter second face. The first adapter defines a first adapter post and a first adapter hole. The first adapter post that extends from the first adapter first face. The first adapter hole that extends from the first adapter first face towards the first adapter second face.

A coupling assembly includes a flexible coupling and a first adapter. The flexible coupling defines an opening that extends along a central longitudinal axis between a first coupling end and a second coupling end. The first adapter is arranged to be at least partially received within the opening proximate the first coupling end. The first adapter extends between a first adapter first face and a first adapter second face. The first adapter defines a first adapter post and a first adapter hole. The first adapter post that extends from the first adapter first face. The first adapter hole that extends from the first adapter first face towards the first adapter second face.

An apparatus for use in turning steerable vehicle wheels includes a steering column having a pinion connected with a vehicle steering wheel such that rotation of the steering wheel results in rotation of the pinion. An electrically powered steering unit includes an electric motor having a first output shaft rotatable about an axis. A first planetary gear stage has a first gear reduction ratio and is driven by the first output shaft. A second planetary gear stage is driven by the first planetary gear stage and the pinion and has a second gear reduction ratio different from the first gear reduction ratio. A second output shaft is driven by the second planetary gear stage and coupled to the steerable wheels such that rotation of the second output shaft affects steering of the vehicle wheels.

A coupling assembly includes a flexible coupling and a first adapter. The flexible coupling defines an opening that extends along a central longitudinal axis between a first coupling end and a second coupling end. The first adapter is arranged to be at least partially received within the opening proximate the first coupling end. The first adapter extends between a first adapter first face and a first adapter second face. The first adapter defines a first adapter post and a first adapter hole. The first adapter post that extends from the first adapter first face. The first adapter hole that extends from the first adapter first face towards the first adapter second face.

A coupling assembly includes a flexible coupling and a first adapter. The flexible coupling defines an opening that extends along a central longitudinal axis between a first coupling end and a second coupling end. The first adapter is arranged to be at least partially received within the opening proximate the first coupling end. The first adapter extends between a first adapter first face and a first adapter second face. The first adapter defines a first adapter post and a first adapter hole. The first adapter post that extends from the first adapter first face. The first adapter hole that extends from the first adapter first face towards the first adapter second face.