| 摘要 |
PROBLEM TO BE SOLVED: To surely prevent slipping-off of a bearing supporting a rotational shaft for a long period of time. SOLUTION: A male screw part 20F is disposed on an outer peripheral side of a rear end part of a second rotational shaft 20, and a bolt hole 20G is disposed to an end face 20E on a rear end side of the second rotational shaft 20. The retaining member 23 is constituted of: a cover part 23A facing an end face 20E of a second rotational shaft 20 and having a through-hole 23D; and a nut part 23B screwed with the male screw part 20F. The nut part 23B of the retaining member 23 is brought into abutment with an end face 22A1 of an inner ring 22A of a tapered roller bearing 22, by making the nut part 23B of the retaining member 23 be screwed with the male screw part 20F of the second rotational shaft 20, and a rotation prevention bolt 24 inserted into the through-hole 23D disposed to the cover part 23A of the retaining member 23 is screwed into the bolt hole 20G of the second rotational shaft 20. Thereby, the rotation stop bolt 24 prevents the nut part 23B of the retaining member 23 from rotating, and slipping-off of the tapered roller bearing 22 is surely prevented by the retaining member 23. COPYRIGHT: (C)2011,JPO&INPIT |
