采用踏杆式驱动机构的人力车

Man-powered vehicle with foot-arm driving mechanism

踏杆式人力车驱动机构用踏杆代替了传统人力车的曲柄,乘骑者踏动脚蹬时,踏杆绕中轴上下摆动,摆动角小于120°,不存在驱动力臂为零的死点,而且可根据车辆载荷人工调整踏杆长度,从而改变驱动力矩的大小和车辆的行走速度,能充分发挥人力的作用效率.

Foot-arm driving vehicles use foot-arms as their driving mechanism,instead of the traditional cranks.When a rider pushes treadles,the foot-arms swing around a shaft up and down,with a swing angle less than 120 degree.The dead point where the driving arms of force is zero is not present.The length of the driving arms can be adjusted,according to the loading,to change the driving moment of force and the speed of the vehicle.As a result,the man power can be utilised efficiently.