author: Potensi-Ella
The elevator itself is a complete transportation equipment. It adopts a variety of safety measures to eliminate potential safety hazards such as falling and topping. As long as the elevator is used correctly and regularly maintained and inspected, there will be no safety accidents. The main safety protection devices include speed limiter, safety gear, and buffer.

The speed limiter is an overspeed detection device, which is generally installed on the top of the elevator machine room or elevator shaft, and it may also be installed in the pit. When the elevator exceeds the speed and reaches the set electrical action speed, it will cut off the safety circuit of the elevator through the electrical switch, and then cut off the power supply of the system. If the elevator continues to overspeed due to gravity or inertia, the mechanical action device of the speed limiter will be triggered to stop the speed-limiting wire rope, thereby lifting the safety gear.

The safety gear is a braking device installed at the bottom of the elevator car or elevator counterweight. It includes two parts, the lifting mechanism and the braking mechanism. The function of the lifting mechanism is to transfer the mechanical action of the overspeed governor to the braking mechanism and make the braking mechanism act. After the actuation of the braking mechanism, the internal wedge block will jam the elevator on the guide rail to prevent the elevator from falling further.

The buffer is installed in the pit of the elevator shaft. Its function is to prevent the bottom of the elevator pier. At the bottom of the elevator pier, it can reduce the impact, so as to reduce the damage to the elevator itself and the passengers in the elevator.