Elastic part having sealing function

The invention discloses an elastic part having a sealing function, belongs to the technical field of hydraulic transmission and aims to provide an elastic part convenient to manufacture, simple in structure and capable of achieving the sealing function and pressure transfer. For solving the technical problem, according to the technical scheme, an elastic part body of the elastic part having the sealing function is rotary body and is a concentric circle type wavy structure in the radius direction, a columnar protrusion is arranged at the center of the elastic part body, and a seal ring is arranged on the edge of the elastic part body. The elastic part can be used on the occasion needing bicycle braking and other occasions needing small pressure transfer displacement. 本发明公开了具有密封功能的弹性件，属于液压传动技术领域；所要解决的技术问题是提供了种制造方便、结构简单、可以实现密封功能和压力传递的弹性件；解决该技术问题采用的技术方案为：具有密封功能的弹性件，弹性件本体为回转体，弹性件本体沿着半径方向为同心圆式波浪形结构，弹性件本体中心设置有柱状凸起，弹性件本体边缘设置有密封环；本发明可以用在自行车制动等压力传递位移量小的场合。