目前,脚闸自行车上广泛应用的是压紧辊式脚闸,这种脚闸采用压紧辊式传动机构,自行车轮的转动是经过几个辊柱的传动来实现的。当小链轮向前蹬即加速时,辊柱在五花头内沿曲面上升,并压向闸皮套的内表面,产生很大的径向压力和磨擦力,使五花头带动闸身、车轮一起向前滚动。当脚蹬停住时,辊柱回到五花头曲面的最低位置,整个闸身的内部构件与闸身脱离,闸身、车轮在轴承 At present, widely used foot brakes are pressure roller foot brakes, which use pressure roller drive mechanism, wheel rotation is achieved through the transmission of several rollers. When the small sprocket is stepped forward to accelerate, the roller rises along the curved surface in the flower head and presses against the inner surface of the brake holster, resulting in a great radial pressure and friction, so that the flower head drives the brake body and the wheel Scroll forward together. When the pedals stopped, the roller back to the lowest position of the five flower head surface, the entire body of the internal body components and the brake from the body, the wheel in the bearing