The difference between rigid cardan shaft and constant velocity cardan shaft

Rigidity universal joints can be divided into unequal velocity universal joints (such as cross shaft universal joints), quasi-constant velocity universal joints (such as double-connected universal joints, three-axis pin universal joints) and constant velocity universal joints. Joints (such as ball and cage universal joints, ball-fork universal joints). Uniform speed and non-uniform speed refer to whether the rotation angular velocity of the driven shaft is the same when the driven shaft rotates along with the driving shaft. Naturally, the average speed ratio of the driving shaft and the driven shaft are the same.

Uniform velocity universal joint: The angular velocity of the main and driven axis is still the same when the angle between the two shafts changes. It is called a constant velocity universal joint or a constant angular velocity universal joint. They are mainly used in the vehicle wheel transmission system that turns into a drive, a break-off drive, etc., and the key is used to transmit the driving force in a car. The variable speed universal joint: the angular velocity of the main and driven shafts is in the middle of the two shafts. Universal joints that are different when the angle of intersection are changed are called variable speed universal joints, also known as cross-shaft universal joints. Cross-shaft stiffness universal joint drive shafts are the most commonly used in vehicle transmission systems. History The time is the longest. When the car is rear-wheel drive, the cross-shaft universal joint drive shaft is often used. For some high-end cars, the uniform speed ball cage is also used; when the car is front-wheel drive, it is often used, etc. Speed ​​universal joint-Constant velocity universal joint is also a kind of drive shaft, just a different name.

The drive shaft usually refers to the universal joint drive shaft with cross-shaft rigidity. The cross-shaft rigidity universal joint is used to transfer the change of perspective. Generally, it is composed of flange fork, cross shaft with needle roller bearing, universal joint fork or rolling fork, intermediate coupling fork or gear shaft fork, and needle bearing. The flange fork is a fork-shaped part with a flange. Generally, forged parts of low-carbon steel or medium-carbon steel are used. There are also sand mold castings and low-carbon steel castings that use ductile castings. Steel or medium-carbon high-quality carbon steel precision castings. The flange fork generally has a flat flange, and also has a trapezoidal tooth flange with an inner hole. The cross shaft with needle roller bearing generally contains four rollers. Needle bearing, a cross shaft, and a grease nipple. Needle roller bearings are generally composed of several needle rollers, a rolling bearing bowl, and a multi-knife rubber oil seal (a part with a frame).