| 摘要 |
PROBLEM TO BE SOLVED: To provide a turning gear capable of reducing an energy loss caused by slide friction by avoiding a touch between a holder and an inner member.SOLUTION: A turning gear comprises: an outer member 3; an inner member 2 including thrust surfaces 2c and 2e of which the diameters are enlarged outwards in a radial direction while opposing both axial end faces 3b of the outer member 3; a radial roller bearing 10 disposed between an inner circumferential surface 3a of the outer member 3 and an outer circumferential surface 2a of the inner member 2; and a thrust roller bearing 20 disposed between at least one axial side end face 3b of the outer member 3 and the thrust surfaces 2c and 2e of the inner member. The radial roller bearing 10 includes a radial holder 12, the thrust roller bearing 20 includes a thrust holder 22, and lock means 12a and 22a for axially locking the thrust holder 22 are formed in at least one end portion of the radial holder 12. |
