Patent ID: 7338078
Filing Date: 2008-03-04
Classification: B62D,F16C,F16D

Abstract:
1. A telescopic shaft for vehicle steering which is installed in a steering shaft of a vehicle and in which a male shaft and a female shaft are fitted to each other to be capable of transmitting torque therebetween and moving in an axial direction, characterized in that: at least one first pair of axially extending grooves is formed respectively on an outer peripheral surface of said male shaft and an inner peripheral surface of said female shaft so as to face each other with at least one spherical body, radially biased by a spring, interposed therebetween; and for at least one said first pair of grooves, a corresponding projection is formed on the outer peripheral surface of said male shaft so as to be axially juxtaposed to the corresponding groove formed on the outer peripheral surface of said male shaft and so as to be fitted, through a gap, in the corresponding groove formed on the inner peripheral surface of said female shaft.