1. The click engages the teeth of the gearwheel.

2. Driving system consists of gearwheel box, universal couplings and arc - gear synchronous belt.

3. The driving consists of synchronous belt, gearwheel device and universal shafts with high driving efficiency and low consumption.

4. Around the world, the blue and gold gearwheel represents community involvement, international goodwill, and service.

5. The antiskid drive mechanism is the gearwheel and gear rack antiskid mechanism, the chain wheel and chain link antiskid mechanism, and the steel cable antiskid mechanism.

6. The motor needs to be move further apart from the gearwheel as a bigger pinion with higher number of teeth has to be used.

7. In order to reduce the probability of failure, the influence of a gearwheel with staggering tooth on the meshing stiffness of gear with double circular arc was investigated.

8. The utility model can drive a wire rope through the combination of a swinging mounting, a stationary wire spool, a gearwheel disk, a fixed tray, a pinion, a motor, etc. to attain automatic elevating.