What are the safety devices of a crane?

[MilaDella]

Crane safety devices: 1. Lifting limit switch, weight-type limit, rotation limit, to prevent the lifting stroke from exceeding the limit. 2. Load limiter or electronic scale, to prevent overloading of lifted objects. 3. Travel limit switch, single limit, double limit, with pre-deceleration limit, to prevent the trolley from exceeding the travel range. 4. Anti-collision device, laser detection anti-collision, distance detection through laser reflection, buffer, to absorb collision kinetic energy. 5. Electrical interlock switch, door switch, boarding request switch. 6. Overspeed switch, detects the speed of the lifting motor, activates when the motor stalls. 7. Special lifting mechanisms have speed feedback, safety brakes, safety brakes directly lock the drum.