XINLAN simply analyzes the function and classification of universal joints

If the universal joint has a certain degree of elasticity in the torsion direction, the power is transmitted by elastic parts, and has a buffer and vibration reduction effect, it is an elastic universal joint.
Rigid universal joints are often used in automobiles.
XNUMX. Cross-shaft rigid universal joint
The cross-shaft rigid universal joint is simple in structure, reliable in work, and allows a large angle of intersection between the two connected shafts. It is universally used in automobiles.
1.Construction and lubrication
2.Unequal speed characteristics of cross-shaft rigid universal joint transmission
When a single cross-shaft rigid universal joint has an angle between the input shaft and the output shaft, the angular velocities of the two shafts are not equal. The greater the angle α between the two shafts, the greater the rotation angle difference (Φ1-Φ2). The unequal speed characteristic of the joint is more serious.
XINLANCouplingAnalyzing the unequal speed characteristics of the universal joint drive will cause the driven shaft and the transmission components connected to it to produce torsional vibration, thereby generating additional alternating loads and affecting the life of the transmission components.
3.Constant speed condition of cross shaft universal joint drive
(1) Adopt double universal joint section transmission;
(2) *The angle α1 between the two shafts of the universal joint is equal to the angle α2 between the two shafts of the second universal joint;
(3) *The driven fork of the universal joint and the active fork of the second universal joint are in the same plane.
XNUMX. Quasi-constant velocity universal joint and constant velocity universal joint
1.Quasi Constant Velocity Joint
The universal joint designed according to the principle of double universal joint to realize constant velocity transmission is called quasi-constant velocity universal joint.
(1) Double universal joint
Features: Two cross-shaft universal joints are connected, and the length of the intermediate drive shaft is reduced to the minimum.
Advantages: Allowing a larger angle between the shafts, good bearing sealing, high efficiency, simple manufacturing process, convenient processing, reliable work, etc.Mostly used in off-road vehicles.
(2) Three-pin shaft universal joint
Advantages: Allows a larger angle between two adjacent axles, and is used for steering drive axles of some off-road vehicles.

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