Abstract: A telescopic shaft (5) has an inner shaft (12) and a tubular outer shaft (13) that are fitted to each other so as to be relatively movable in an axial direction (X1) and to be able to transmit torque between each other. A row of a plurality of rolling bodies (14) is interposed between corresponding axial grooves (15, 16) of the inner shaft (12) and the outer shaft (13). A retaining member (17) moving together with the rolling bodies (14) while retaining the rolling bodies (14) has a facing portion (33) facing an end surface (121) of the inner shaft (12). As the telescopic shaft (5) telescopes in and out, the facing portion (33) comes into contact with the end surface (121) of the inner shaft (12), and this limits the movement of the rolling bodies (14) in the axial direction (X1).

Abstract: A telescopic shaft (5) has an inner shaft (12) and a tubular outer shaft (13) that are fitted to each other so as to be relatively movable in an axial direction (X1) and to be able to transmit torque between each other. A row of a plurality of rolling bodies (14) is interposed between corresponding axial grooves (15, 16) of the inner shaft (12) and the outer shaft (13). A retaining member (17) moving together with the rolling bodies (14) while retaining the rolling bodies (14) has a facing portion (33) facing an end surface (121) of the inner shaft (12). As the telescopic shaft (5) telescopes in and out, the facing portion (33) comes into contact with the end surface (121) of the inner shaft (12), and this limits the movement of the rolling bodies (14) in the axial direction (X1).

Abstract: An elastic shaft joint includes: a tube shaft; a shaft coaxially inserted in the tube shaft so that a predetermined axial region of the shaft overlaps with a predetermined axial region of the tube shaft; and a damper inserted between the predetermined axial region of the shaft and the predetermined axial region of the tube shaft for damping vibration and providing an elastic play in a rotation direction.