Patent ID: 11945520
Assignee: ROBERT BOSCH GMBH
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F  Y | IPC B

Claim 0:
1. A steering system comprising:
a steering rod mounted in a housing such that the steering rod is displaceable in a longitudinally axial manner, the steering rod having a recirculating ball thread;
a steering motor;
a ball screw drive via which the steering motor acts on the steering rod, the ball screw drive including a transmission nut that is driven by the steering motor and interacts via spherical transmission elements with the recirculating ball thread of the steering rod;
a pivot bearing that mounts the transmission nut such that the transmission nut is rotatable within the housing; and
a flexible drive mechanism having a mechanism wheel via which power of the steering motor is transmitted to the transmission nut, the mechanism wheel being fixedly attached to an inner ring of the pivot bearing such that the mechanism wheel cannot tilt,
wherein the transmission nut is mounted on the mechanism wheel such that the transmission nut is pivotable about a pivot axis oriented perpendicularly with respect to a longitudinal axis of the steering rod, the transmission nut having a first curved joint section that interacts with a second curved joint section defined at least partially by the mechanism wheel so as to provide a pivoting bearing about which the transmission nut is pivotable about the pivot axis,
wherein at least one of the first and second curved joint sections is provided with a sliding coating and/or a lubricant is arranged between the first and second curved joint sections.