| 摘要 |
PURPOSE:To firmly install a tyre onto a rim in order to prevent a slip between the tyre and the rim by forming a projection with a sharp point through machining work on the inner surface of a light alloy rim on which the tyre is attached so that the inner surface becomes a grater-like surface. CONSTITUTION:The inner surface 12 of the ear part 11 of a light alloy rim is provided with projections 13 as an antiskid means 1. Every projection 13 is tilted by the predetermined angle while a groove 14 is formed between the projection 13 and the ear part 11. Though the projection 13 and groove 14 are installed on the entire periphery of the rim, their arrangement and positions are not specified but they are placed, for example, in such a manner that the directions of tilt of adjacent projections 13 are equal and reverse to each other. By forming the inner surface 12 of the rim into a grater-like surface, a tyre installed on this inner surface 12 can be fitted tightly. Accordingly, even with large impulsive torque during the period of acceleration/deceleration, no slip will occur between the rim and the tyre. |
