| 摘要 |
The planetary roller screw drive (PRSD (1)) is intended in particular for the actuation of a clutch of a vehicle, wherein the planets have a planet geometry for force introduction in particular from one side, such that a plurality of planetary rollers (3) are engaged in a first longitudinal region with a profiling (P2) of a spindle (2) by way of their profilings (P3.1, P3.2) and the profilings (P3.2) of the planetary rollers (3) mesh in a second longitudinal region with a profiling (P4) of a ring gear (4) encircling the planetary rollers (3), wherein the profilings (P2, P3, P4) are formed in the manner of a screw thread with elevations and grooves extending therebetween, and wherein the planetary rollers (3) extend axially parallel to the spindle (2) and are positioned so as to be freely rotatable about their own longitudinal axis at both ends in planetary roller carriers, and the planetary roller carriers are supported in a rotationally fixed manner. According to the invention, the planetary rollers (3) have, at only a first end in the vicinity of the second longitudinal region, a bearing journal (7) by way of which they are mounted in the first planetary roller carrier, while the planetary rollers (3) are supported in the second planetary roller carrier at their second end by way of their profilings (P3.1). Likewise according to the invention is an actuator, in particular for actuating a clutch in the drive train of a vehicle having a planetary roller screw drive according to the invention. |
