| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a play between an extension part and a worm wheel by a fitting member which absorbs the error between hole parts caused by the manufacturing error and the secular expansion in diameter and is individually inserted in the hole parts, and to smoothly insert pipes for electric cables and hoses in a hollow shaft member. SOLUTION: A bucket is provided on the tip of a boom of a high altitude working vehicle through a hinge. A worm wheel 31 and a cylindrical part 31a are housed over the outer circumferential surface of an extension part 13a of a hollow shaft member 13 extended in the perpendicular direction of the hinge, a fitting member 34 is inserted in both hole parts in a condition where a first hole part 32 in the extension part is agreed with a second hole part of the cylindrical part, and the worm wheel is fitted to the extension part. The fitting member 34 is provided with a cylindrical member 41 having a slit expandable in the radial direction of both hole parts, a nut member 51 to be slidably moved on the inner circumferential surface side of the cylindrical member 41, and a bolt member 54 which is screwed in a female screw part 53 of the nut member 51 and drives the nut member 51 between tapered surface 43 to expand the cylindrical member. |
