| 摘要 |
PURPOSE:To prevent wear of a tire by interrupting an inside tire from contacting with the ground when load to the tire is not large, by designing the diameter of an inside tire to be a little smaller than that of an outside tire, in double wheels for rear wheels of bus or the like. CONSTITUTION:The diameter of an inside tire 1 is designed to be a little smaller than that of an outside tire 2. With such an arrangement, the outside tires 2 only are contacted with the ground, while the inside tires 1 are idled, when load to the tires is not large. On the other hand, when load is increased, the outside tires 2 are collapsed, so that the inside tires 1 are also contacted with the ground, and the load is burdened by both inside and outside tires 1 and 2. Accordingly, wear of tire can be decreased, because the inside tires 1 are contacted with the ground only when they are needed. |
