1. Due to poor smoothness or smooth system problems, the rolling parts of the components are severely heated and worn or hung on the shaft, causing the parts of the rolling or sliding parts to be destroyed.
2. Due to the frequent use of elevators, some parts are worn and aged, and maintenance is not in place. Failure to replace or correct the worn parts in time, resulting in further expansion of damage, forcing the elevator to stop.
3. In the elevator working process, some fastening screws are loosened or loosened due to vibration, which makes certain parts, especially moving parts, work abnormally and cause elevator damage.
4. Because the elevator balance coefficient is out of adjustment, or severe overload causes large car vibration or poor leveling accuracy, the elevator speed is out of control, or even the top or bottom, causing the speed limiter safety gear to link and the elevator to stop.
