Types of (ball) towing couplings
| No. | Classification criterion | Type |
|---|---|---|
| 1 | Trailer type | Without braking system |
| With braking system | ||
| 2 | Shape of the drawbar body | Square (50, 60, 70 mm) |
| Cylindrical (45, 50, 60 mm) | ||
| V-shaped | ||
| 3 | Coupling/wear indicator | Without wear indicator |
| With wear indicator | ||
| 4 | Preloading of the spherical pair (ball joint) | Without preload |
| With preload |
Constructive structures
Variant I
Key: 1 – towing ball hook; 2 – towing coupling body; 3 – coupling handle; 4 – locking latch; 5 – cylindrical helical spring; 6 – pin; 7 – self-locking nut; 8 – clamp.
Variant II
Key: 1 – coupling/uncoupling handle; 2 – towing ball hook; 3 – towing coupling body; 4 – nut; 5 – cylindrical helical preload spring; 6 – clamp; 7 – pin; 8 – cylindrical helical spring returning the clamp to the uncoupled position; 9 – eye bolt; 10 – self-locking latch.