By flexibility
Drive shafts can be classified into different categories according to their important components-universal joints. According to whether the universal joint has obvious elasticity in the torsion direction, it can be divided into rigid universal joint drive shaft and flexible universal joint drive shaft.
1. Rigid universal joint: the power is transmitted by the hinged connection of the parts.
2. Torsion universal joint: Relying on elastic parts to transmit power, and has the function of buffering and damping.
According to angular rate
Rigid universal joints can be divided into unequal velocity universal joints (such as cross-shaft universal joints), quasi-constant velocity universal joints (such as duplex universal joints, three-pin shaft universal joints) and constant velocity universal joints. Universal joints (such as ball cage universal joints, ball fork universal joints). Constant speed and unequal speed refer to whether the rotational angular velocity of the driven shaft is equal when the driven shaft rotates with the driving shaft. Of course, the average speed of the driving shaft and the driven shaft are equal.
