Patent ID: 8197348
Filing Date: 2012-06-12
Classification: B62D,F16C

Abstract:
1. Telescopic shaft for vehicles, comprising: an inner shaft axially movable in an outer shaft; at least two rows of balls with at least one ball a row between the inner shaft and the outer shaft, where a row of balls is arranged on at least one ball race arranged against the inner shaft, wherein the ball race is wedge shaped on its against the inner shaft facing surface; a prestress mechanism which pushes the ball race along a wedge unit axially in relation to and radially in the direction against the outer shaft whereby the telescopic shaft is prestressed; and a ball retainer which is movable in relation to the ball race, the ball retainer reaching an end of the ball race when the alteration in length of the telescopic shaft exceeds a predetermined length, and wherein the ball retainer, when it reaches said end of the ball race, is arranged to influence the prestress mechanism so that the ball race slides along the wedge unit whereby the prestress is eliminated.