Clutch capable of being triggered at high speed in uncontrollable manner and maintaining low speed

Abstract

The invention provides a clutch capable of being triggered at a high speed in an uncontrollable manner and maintaining a low speed. The clutch mainly comprises an input shaft, an output shaft and a centrifugal clamping block. According to the clutch, under the circumstance without supply and control of external energy, the clutch can also work normally. When the input shaft operates at overspeed, the output shaft and the input shaft are connected automatically, transmission is stable, and large torque can be transferred. Particularly after connecting is completed, when the rotating speed of the input shaft is reduced to the low speed from the high speed and even rotating stops, the stable connection maintaining state can still be achieved. The clutch has the beneficial effects of being simple in structure, high in reliability, good in maintainability, low in cost and the like.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a clutch for realizing the transmission of rotational motion of two rotating shafts. Background technique [0002] With the increase in the number of high-rise buildings, the number of traction elevators has increased rapidly, but the problem of evacuation of people in high-rise buildings in emergencies such as fires has become increasingly prominent. The ZL201210346849.5 "an elevator with self-running lifesaving function in case of power failure" has been published, and it is proposed to realize the speed limit operation of the car by connecting the damping device through the clutch, which can also simultaneously solve the problem of accidental stalling and falling of the car s solution. In the above usage scenarios, the functional performance requirements for the clutch are as follows: when the external power supply of the elevator system is interrupted and the elevator transmission sys...

AI Technical Summary

Problems solved by technology

[0003] However, the existing mechanical, pneumatic, hydraulic, electromagnetic, magneto-rheological and other clutches have complex structures and high costs, especially require additional actuators, and after the daily or clutch trigger work, the clutch needs to be powered. supply; this makes this type of clutch consume energy daily and is not economical, or needs energy protection in place for emergency work but is not reliable

For the existing centrifugal clutches that can work without energy supply, they all require the input shaft to work stably at high speeds. However, after the input shaft speed decreases, they will generally be automatically disconnected. This feature will make the damping device The connection with the elevator transmission system is intermittent, which reduces the reliability of the system and makes it difficult to guarantee the safety of the elevator system during emergency operation

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