Roadwheel-Aktuator

Abstract

The invention relates to a roadwheel actuator (1) of a steer-by-wire steering system (2) of a motor vehicle (3), comprising a steering gear (5) driven by a steering actuator (4) for adjusting the steering angle of at least one vehicle wheel (6) of the motor vehicle (3), wherein the steering gear (5) is configured to convert a rotary movement of the steering actuator (4) into a linear movement of a steering rod (7) of the steering gear (5) coupled to a vehicle wheel (6), and an anti-rotation device (8) which interacts with the linearly displaceable steering rod (7) in such a way that, during operation of the roadwheel actuator (1), a linear offset of the steering rod (7) is permitted, but rotation of the steering rod about its longitudinal axis (9) is prevented, wherein the steering rod (7) has at least a first section (10) and a second section (20), each of which has a cross-sectional contour (11a) deviating from the central circular shape.11b) and which engage with the anti-rotation device (8), and wherein the anti-rotation device (8) has a rolling bearing (12), wherein the rolling bearing (12) has at least two rolling bearing rollers (13, 14) which, viewed in cross-section of the steering rod (7), are arranged at an angle (Σ) to each other in a V-shape, and each roll on one of the sections (10, 20) of the steering rod (7), wherein the angle Σ between the rolling bearing rollers is in the range of 50° to 90°, preferably 55°-75°, particularly preferably 60°-65°,

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