Wheel Loader Universal Joint Kit Cross Bearing Single

Universal joints, our common universal joints have many types, whether they are Hook, ball cage, bump or three-pin type, they can be simply divided into: constant velocity universal joints and non-constant velocity universal joints. Here, we will directly distinguish the constant velocity and non-constant velocity properties of the universal joint through simple analysis.
Among them, when the input and output of the Hooke universal joint and cross shaft are non-coaxial, the input and output angular velocities will be unequal. As a traditional machine, it may not be very particular, but for the automobile transmission system, the speed impact caused by this non-constant speed will affect the ride comfort. Of course, it will also affect the life of other parts, such as the differential! Therefore, among the steering drive wheels that we can find that use cross-axis universal joints, only the Beijing Jeep (like to call it 212 at that time) has it. Other models basically use the ball cage type. The increased cost will reduce the difference. reduce the design difficulty of the transmission and improve the ride comfort of the entire vehicle.
Of course, many friends and colleagues have read "Universal Joints and Transmission Shafts" by Professor "Wood Jung", in which detailed calculations prove the constant and unequal speed properties of various universal joints. Here we will no longer continue to use calculation methods to prove to everyone, but use another simple judgment method to directly judge whether the universal joint is constant velocity or non-constant velocity.

Telescopic ball cage universal joint VL joint
The biggest feature of the telescopic ball cage universal joint (VL joint) in the picture above is that the plane where the centers of the upper and lower balls are located is the symmetry plane of the universal joint. The input shaft and the output shaft have a relative symmetry plane. The included angles are equal angles, so the radius where the center of the sphere is located is the same radius relative to the input shaft and the output shaft. Therefore, regardless of the input shaft or the output shaft, the linear speed of the center of the sphere is equal, so the input shaft and the output shaft The angular velocities of the shafts are always equal, so the entire joint is a constant velocity joint.

1949 Robert Bauchard fixed (three-pin) universal joint
The characteristic of the three-pin universal joint is that two sets of cross universal joints are used in pairs, so that the input angle and the output angle of the constant velocity universal joint of the two universal joints can be equal to each other. The three-pin universal joint shortens the intermediate shaft to a length of 0. However, the three-pin type is almost never used in cars. After all, the load-bearing capacity is limited and the cost is difficult to reduce. The main reason is that the process is slightly complicated.

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