What are the safety devices of lifting machinery?

[OEvelyn]

Here are the safety devices of lifting machinery: 1. Hoisting limit switch, weight-type limit, rotary limit, to prevent the hoisting stroke from exceeding the limit. 2. Load limiter or electronic scale, to prevent overloading of the lifted load. 3. Travel limit switch, single limit, double limit, with pre-deceleration limit, to prevent the trolley from running beyond the stroke. 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, to detect the speed of the hoisting motor, which takes effect when the motor stalls. 7. Special hoisting mechanisms have speed feedback, safety brakes, and safety brakes directly lock the drum.