WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF ...

1. The structure of the cross axle universal coupling consists of a cross shaft, two universal joint forks, and four needle bearings; the rotation centers (axes) of all the rotating pairs of the universal-joint shaft coupling intersect at a point o, and the angle between the two shafts is α; it is a device (coupling) used to transmit the motion between two intersecting shafts with variable angles.

Check now

2. The working principle of the universal-joint shaft coupling: when shaft I rotates one circle, shaft II will also rotate one circle, that is, the average transmission ratio of the two shafts is 1; but the instantaneous transmission ratio of the two shafts is not always 1, but changes periodically; this characteristic of the universal Cardan shafts is called the unevenness of the instantaneous transmission ratio; for a single universal joint, when there is an angle between the input shaft and the output shaft, the angular velocities of the two shafts are not equal, that is, the cross axle universal coupling has non-uniform speed; the larger the angle α between the two shafts of the universal coupling, the more obvious the speed fluctuation of the driven shaft; therefore, α should be between 350 and 450. In order to prevent the angular velocities of the driving and driven shafts of the universal-joint shaft couplings from being unequal; in order to completely eliminate the disadvantages of the variable speed transmission of the driven shaft in the above-mentioned universal joint, they are often used in pairs.

3. Advantages of universal joint drive shafts: It has a large angular compensation capacity, compact structure, and high transmission efficiency;

4. Disadvantages of cross axle universal couplings: It will generate additional dynamic loads during transmission, and the speed should not be too high;

5. Application occasions of universal Cardan shafts: It is mainly used for transmission of two intersecting shafts, heavy load, medium load, light load and other medium and low speed occasions, such as machine tools and automobiles.

6. Conditions that double universal couplings should meet:

Goto Zhenjing to know more.

In order for the cross axle universal coupling to obtain a constant transmission ratio, the mechanism must meet the following three conditions:

(1) The three axes of the driving shaft, driven shaft, and intermediate shaft of the universal joint drive shaft should be located in the same plane.

(2) The inter-axial angles of the driving shaft, driven shaft and intermediate shaft of the universal coupling should be equal.

The Cardan Shaft Coupling is a high-performance coupling with numerous advantages, making it particularly suitable for mechanical systems that require large-angle compensation, high load capacity, efficient transmission, and smooth operation.

The main features of the Cardan Shaft Coupling include:

• Large-Angle Compensation Capability: The Cardan Shaft Coupling offers significant angular compensation, with a shaft deflection angle of 15-25 degrees. This makes it highly applicable in mechanical transmission systems requiring substantial angle adjustments.
• Compact and Rational Structure: The integrated fork design enhances load reliability while ensuring a compact structure, making it ideal for installations in confined spaces.
• High Load Capacity: Compared to other types of couplings with the same rotation diameter, the SWC universal coupling can transmit greater torque, especially suitable for equipment with restricted rotation diameters.
• High Transmission Efficiency: With a transmission efficiency of 98-99.8%, it is well-suited for high-power transmission scenarios, offering significant energy-saving benefits.
• Smooth Operation: The coupling provides stable load transmission, low noise, and easy assembly and maintenance, which improves the overall quality and longevity of the equipment.

When installing and using the Cardan Shaft Coupling, consider the following points:

• Ensure the consistency of universal shaft performance and avoid changing the universal shaft status arbitrarily.
• Take appropriate protective measures to ensure safety.
• During installation, align the flange fork position carefully, avoiding unintentional movement or replacement of the spline.
• For telescopic universal shafts, securely fix the flange of the connected component to the universal shaft.
• If the Cardan Shaft Coupling has been stored for over six months, re-lubricate it before use.

In summary, due to its exceptional performance and reliability, the Cardan Shaft Coupling plays a crucial role in various industrial applications, especially in situations requiring large-angle compensation, high torque transmission, and high-efficiency power transfer.

SWC-type Cross Shaft Universal Coupling basic parameters and main dimensions

Type Rotation diameter
D
(mm) Nominal torque
Tn
(KN.m) Fatigue torque
Tf
(KN.m) Axis angle
β
（°） Scalable capacity
Ls
（mm） Size （mm） Moment of Inertia
(kg/m²) Weight
（kg） Lmin D1(js11) D2
(H7) D3 Lm n×∅d k t b
（h9） g Lmin Increase
100mm Lmin Increase
100mm SWC100BH 100 2.5 1.25 ≤25 55 405 84 57 60 55 6×∅9 7 2.5 / / 0.004 0. 6.1 0.35 SWC120BH 120 5 2.5 ≤25 80 485 102 75 70 65 8×∅11 8 2.5 / / 0.001 0. 10.8 0.55 SWC150BH 150 10 5 ≤25 80 590 130 90 89 80 8×∅13 10 3 / / 0.042 0. 24.5 0.85 SWC180BH 180 22.4 11.2 ≤15 100 840 155 105 114 110 8×∅17 17 5 24 7 0.175 0.007 70 2.8 SWC200BH 200 36 18 ≤15 110 860 170 120 133 115 8×∅17 17 5 28 8 0.314 0.013 98 3.7 SWC225BH 225 56 28 ≤15 140 920 196 135 152 120 8×∅17 20 5 32 9 0.538 0.023 122 4.9 SWC250BH 250 80 40 ≤15 140 218 150 168 140 8×∅19 25 6 40 12.5 0.966 0.028 172 5.3 SWC280BH 285 120 58 ≤15 140 245 170 194 160 8×∅21 27 7 40 15 2.011 0.051 263 6.3 SWC315BH 315 160 80 ≤15 140 280 185 219 180 10×∅23 32 8 40 15 3.605 0.008 382 8 SWC350BH 350 225 110 ≤15 150 310 210 245 194 10×∅23 35 8 50 16 5.316 0.146 532 11.5 SWC390BH 390 320 160 ≤15 170 345 235 267 215 10×∅25 40 8 70 18 12.16 0.222 738 15 SWC440BH 440 500 250 ≤15 190 390 255 325 260 16×∅28 42 10 80 20 21.42 0.474 21.7 SWC490BH 490 700 350 ≤15 190 435 275 351 270 16×∅31 47 12 90 22.5 34.1 0.69 27.3 SWC550BH 550 500 ≤15 240 492 320 426 305 16×∅31 50 12 100 22.5 68.92 1.357 34

Video