What are elevator sliding shoes? What is their function?

1. What is an elevator sliding shoe?
Elevator sliding shoes (also known as guide shoes or guide rail shoes) are key components installed on the car and counterweight device in the elevator system, used to guide the elevator to run smoothly along the guide rail. They are usually made of metal or composite materials and are divided into two types: sliding guide shoes and rolling guide shoes.

2. The function of elevator sliding shoes
(1) Guiding function
Ensure that the elevator car and counterweight device move vertically along the guide rail, prevent lateral swing or deviation, and ensure operational stability.
(2) Reduce friction and vibration
Sliding guide shoes: Reduce guide rail friction and reduce noise through grease or self-lubricating materials (such as polyurethane).
Rolling guide shoes: Use rollers to contact the guide rail, which has less friction and is suitable for high-speed elevators (such as shopping malls and office buildings).
(3) Safety buffer
Some sliding shoes are designed with elastic elements (such as springs or rubber pads) to absorb slight impacts during operation and improve ride comfort.
(4) Adapting to guide rail deviations
Sliding shoes can compensate for minor errors during guide rail installation (such as unevenness or bending), ensuring smooth operation of the elevator.
(5) Extending equipment life
Reducing mechanical wear on the guide rails and car, reducing maintenance costs.

3. Sliding guide shoes vs. rolling guide shoes

4. Common Problems and Maintenance
Wear Issues: Excessive wear of the guide shoes can cause the elevator to shake or make unusual noises, requiring regular inspection and replacement.
Lubrication Requirements: Sliding guide shoes require regular lubrication, and rolling guide shoes require roller inspection for binding.
Foreign Debris: Dust or oil accumulation on the guide rails can accelerate guide shoe wear; therefore, the guide rails must be kept clean.