Wheel decoupling device for a motor vehicle in a bistable embodiment

A wheel decoupling device for a motor vehicle, having a drive element, an output element, a movably arranged sliding clutch that can be connected to the drive element and the output element for conjoint rotation, and an actuation unit acting on the sliding clutch in an adjusting manner, wherein the actuation unit also has a ramp system and the ramp system is designed in such a way that, with a rotation of an adjusting gearwheel, a sliding ring that is supported on the sliding clutch in an axially fixed manner is shifted axially between a first position in which the drive element and the output element are rotationally decoupled from one another, and a second position in which the sliding clutch rotationally connects the drive element and the output element to one another in a form-fitting manner, wherein a position-securing unit is provided which axially secures the sliding ring both in the first position and in the second position, and wherein the adjusting gearwheel and the sliding ring are supported against one another in the axial direction via a rolling element, wherein the rolling element bears directly against a ramp contour of the adjusting gearwheel or a ramp contour of the sliding ring and a holding section is provided in the circumferential direction adjacent to the ramp contour, by means of which the rolling element is secured in a form-fitting manner or in a friction-locking manner against further rolling in the second position of the sliding ring.