Patent ID: 6702084
Filing Date: 2004-03-09
Classification: F16D,Y10T

Abstract:
A clutch operator arrangement for introducing an actuating force into a friction clutch, comprising a ball screw arrangement, wherein the ball screw arrangement includes:a spindle element, said spindle element having a first groove arrangement on an outer circumferential surface thereof; a nut element surrounding the spindle element, said nut element having a second groove arrangement on an inner circumferential surface thereof; a plurality of balls, at least some of said balls engaging into said first groove arrangement and into said second groove arrangement, said spindle element being relatively rotatable about an axis of rotation with respect to said nut element so that said balls roll in said first groove arrangement and said second groove arrangement while at the same time rotating about respective ball axes of rotation during the relative rotation of said spindle element and said nut element, wherein, based on said ball axes of rotation, an effective ball-rolling radius with which said balls roll along said first groove arrangement is smaller than an effective ball-rolling radius with which said balls roll along said second groove arrangement, said spindle element being fixedly supported on a substantially stationary assembly so that said spindle is fixed with respect to rotation relative to said axis of rotation, said nut element acting on a bearing acting on a force accumulator of said friction clutch; and a drive arrangement engageable with said nut element for rotating said nut element about said axis of rotation for producing a relative displacement between said nut element and said spindle element in the direction of said axis of rotation.