一、滚柱式拆胎头(见图1):在用它拆卸轮胎时,能把轮胎与拆胎头的滑动磨擦变为滚动磨擦(因为滚柱本身可以自由转动),摩擦力小,不会出现撕胎现象。二、压轮式装胎头见图2:它的活动压轮与被装的轮胎之间也为滚动摩擦,摩擦力小, First, the roller removal of fetal head (see Figure 1): In the removal of the tire with it, the tire and the tire can be removed from the sliding friction friction rolling (because the roller itself can rotate freely), the friction is small, not There will be tear-tear phenomenon. Second, the pressure wheel mounted fetal head shown in Figure 2: Its activities between the wheel and the loaded tire is also rolling friction, friction,