Electrically Supported Power Steering Having an Immobilizer
AssigneeThyssenkrupp Presta AG
InventorsJulian Sandholzer, Max Oertle
Life of this patent
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Abstract
The invention relates to a steering system with an uninterruptible mechanical positive coupling between a steering wheel and a pinion in the form of a steering shaft and with an electrical auxiliary power assistance, in which an electric motor introduces its assistance power into the steering system via a reduction gear mechanism. A switchable magnetic brake is provided, which in a closed switching state blocks the motor shaft of the electric motor frictionally in relation to a motor housing fixed to the vehicle body, and which in an open switching state releases the motor shaft so that this can rotate in a fixed transmission ratio with the steering shaft.
Claims12
A steering system including:
- an uninterruptible mechanical positive coupling between a steering wheel and a pinion in the form of a steering shaft;
- an auxiliary shaft, which is coupled in a torque-resistant manner via a reduction gear mechanism to the steering shaft;
- and
- a switchable magnetic brake, which in an open switching state is configured to release the auxiliary shaft so that the auxiliary shaft can rotate in a fixed transmission ratio with the steering shaft, and which in a closed switching state is configured to lock the auxiliary shaft frictionally with respect to a holder fastened to the vehicle body.
The steering system according to claim 12, wherein the reduction gear is implemented as a worm gear, wherein a worm shaft is directly coupled in a torque-resistant manner to the auxiliary shaft.
The steering system according to claim 12, wherein the reduction gear comprises a gear mechanism coaxially surrounding the steering shaft.
Dependencies are inferred from the claim text.