本设计通过偏心轮机构实现自行车车座的上下往复运动,使此类自行车同时具有代步和健身两大功能,结构简单,加工方便,成本低.%This design is through eccentric gear to realize the up and down reciprocating motion of a bike seat which makes this kind of bike have the two features of traveling and fitness and with the advantages of simple structure, easy to processing and low cost.
展开▼
