Five pieces refer to: traction machine, control cabinet, speed limiter, car door operator, safety gear.

1. The elevator traction machine is the power equipment of the elevator, also known as the elevator host. The function is to convey and transmit power to make the elevator run. It consists of electric motor, brake, coupling, reduction box, traction sheave, frame and guide wheel and auxiliary turning handwheel. The guide wheel is generally installed on the frame or the load-bearing beam under the frame.

2. The control cabinet is to assemble switchgear, measuring instruments, protective appliances and auxiliary equipment in a closed or semi-closed metal cabinet or on the screen according to the electrical wiring requirements. Endanger the safety of people and surrounding equipment. During normal operation, the circuit can be switched on or off by means of manual or automatic switches.

3. The elevator speed limiter is one of the safety control components in the elevator safety protection system. When the elevator is running, for whatever reason, the car is overspeeding or even in danger of falling, and all other safety protection devices do not work, the speed limiter and the safety gear will act in linkage to stop the elevator car. live.

4. The elevator door operator is a mechanism responsible for opening and closing the elevator hall car door. When it receives the elevator door opening and closing signal, the elevator door operator controls the door opening motor through its own control system, and converts the torque generated by the motor into a specific The force of the direction, closing or opening the door. When the closing force is greater than 150N, the door operator automatically stops closing the door and opens the door in the opposite direction, which plays a certain degree of door closing protection.

5. Safety gear is the safety protection device of the elevator. The elevator safety gear device is under the control of the speed limiter, when the elevator speed exceeds the limit speed set by the elevator speed limiter, or when the suspension rope breaks and loosens, the car is stopped and clamped on the guide rail in an emergency. a safety device on the .