Patent ID: 8221250

Claim:
A damper unit comprising: two components connected to each other for co-rotation, the two components being axially displaceable at least to a limited extent relative to each other, and an axially elastic element disposed between the two components; wherein: the two components are connected by a thread connection such that application of an axial load to the components produces a rotational movement of the two components relative to each other and a consequent axial displacement of the two components toward each other whereby the elastic element is compressed; a first of the two components comprises a sleeve-shaped molded recess in which the axially elastic element is received and in which an axial projection on the second of the two components is engaged; the thread connection comprises a partial thread provided between the projection and the molded recess; and the partial thread is constructed as a ball-screw segment which comprises: longitudinal grooves having a circumferential component provided in the axial projection and in the sleeve-shaped molded recess, respectively, so as to form pairs of mutually opposing grooves distributed around the circumference of the projection and recess, at least one ball mounted in each of the pairs of mutually opposing longitudinal grooves, the at least one ball mounted in each of the pairs of mutually opposing longitudinal grooves balls are retained in a ball cage, and the axial projection comprises a central opening, in which a receiving component comprising a radially expanded rim is mounted, the axially elastic element being received between an end face of the axial projection and the rim, and the rim being supported axially against an end face of the sleeve-shaped molded recess.