Universal transmission devices can be divided into two types: closed and open.
1. The closed universal transmission device adopts a single universal joint, the transmission shaft is enclosed in a sleeve, and the sleeve is connected with the frame as a spherical hinge, and is fixedly connected with the drive axle. Its biggest feature is: the transmission shell acts as a thrust The tube transmits the longitudinal force of the automobile, so that the transmission shaft shell plays the role of the longitudinal swing arm in the guiding mechanism of the suspension system, which is very necessary for the subsequent suspension disassembly to use the coil spring as the elastic element.
2. The open type universal transmission device is simple in structure and light in weight. The open type universal transmission device is widely used in modern automobiles.