| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotation preventing structure enabling to avoid adjustment of a rotation quantity of a nut when fixing a lock plate to the nut.SOLUTION: A nut rotation preventing structure includes: a knuckle spindle 14 supporting a wheel hub 10 and having a key groove 14b; a nut 30 screwed to a projection part 14a, which protrudes from the wheel hub 10, of the knuckle spindle 14 and provided with three or more female screw parts bored in the circumferential direction at uneven intervals; an engagement piece 37 wherein a through hole for inserting the projection part 14a is formed to be engaged in the key groove 14b; and a lock plate 35 having through holes which are greater in number than the female screw parts and bored at equal intervals. The knuckle spindle 14 is inserted into the through hole with the engagement piece 37 engaged in the key groove 14b of the knuckle spindle 14, and in accordance with the rotation quantity of the nut 30, a plurality of female screw parts among them are matched with the through holes of the lock plate 35 and screws 29 are screwed in the female screw parts. |
