Brake caliper piston structure

The utility model relates to a brake caliper piston structure which comprises a piston body, one end of the piston body is opened to form a brake pad connecting end, the brake pad connecting end is provided with a plurality of concave surfaces distributed circumferentially at intervals, and the side wall, close to the brake pad connecting end, of the piston body is provided with an air flow channel. The piston body is provided with an air flow channel, the air flow channel is provided with a concave surface, and a circulating flow channel for promoting convection between air in the piston body and air outside the piston body is formed between the air flow channel and the concave surface. Heat in the piston is taken away through natural air, the overall cooling effect on the brake calipers is improved, and it is guaranteed that the braking effect is not affected by temperature rise of the piston. 本实用新型涉及一种制动卡钳活塞结构，包括活塞本体，活塞本体一端开口形成制动片连接端，所述制动片连接端设置多个间隔呈圆周分布的凹面，活塞本体靠近制动片连接端的侧壁设有空气流道，所述空气流道与凹面之间形成促使活塞本体内空气与活塞本体外