The double-helix crank structure comprises a crank and a pair of rocker arms, the tail ends of the two rocker arms are hinged through a root shaft so that the two rocker arms can relatively rotate with the root shaft as the axis, the root shaft is used for being fixedly connected with a bicycle frame of the bicycle, and the head ends of the rocker arms are used for being hinged to pedals through shafts; the middle of the crank is fixedly connected with a main shaft, the main shaft is used for being rotationally connected with a frame of a bicycle and used for being in transmission connection with a driving wheel of the bicycle, the main shaft is parallel to a root shaft, the two ends of the crank are symmetrically and rotationally connected with the two rocker arms in a sliding mode, and the sliding direction is arranged in the length direction of the rocker arms; when the crank is perpendicular to any rocker arm, the included angle between the crank and the other rocker arm is an acute angle. The problem that a dead zone exists in an existing bicycle driving mechanism can be solved.
本发明公开了一种双螺旋曲柄结构及自行车,包括曲柄和一对摇臂,两条摇臂的尾端通过根轴轴铰,以使两条摇臂能够以根轴为轴相对转动,根轴用于与自行车的车架固定连接,摇臂的首端用于轴铰脚蹬;曲柄的中部固定连接有主轴,主轴用于与自行车的车架转动连接,且用于与自行车的主动轮传动连接,主轴与根轴平行设置,曲柄的两端对称与两条摇臂滑动并转动连接,滑动方向沿摇臂的长度方向设置;当曲柄与任意一条摇臂垂直时,曲柄与另一条摇臂的夹角为锐角。其能够解决现有的自行车驱动机构存在死区的问题。
Double-helix crank structure and bicycle
一种双螺旋曲柄结构及自行车
2025-01-03
Patent
Electronic Resource
Chinese