Chain wheel driven elevator

Abstract

The chain wheel driven elevator comprises a lift car, driving rails are arranged on the two sides of the lift car, and the driving rails are fixed to the two sides of an elevator shaft through rail fixing frames. The counterweight rail is fixed on one side of the elevator shaft, and the counterweight rail plays a role in guiding the counterweight device to move up and down; the driving device is arranged at the top of the lift car, and the driving device drives the lift car to move up and down in the lift shaft; wherein the upper end of the driving device is connected with a mooring rope from the counterweight device. Compared with the prior art, the elevator machine room is simple in structure, the lift car can run without traction force of a cable, the lift car can be braked only through braking of the driving device, complex elevator safety components are omitted, the lift car can still stop on the track through counter-acting force of the track when an elevator encounters an emergency or under the condition that the cable is broken, and the safety of the elevator is improved. The situation that the cable breaks and loses traction force, and consequently the lift car overspeeds and falls is avoided, and the elevator or people taking the elevator are safer.

Description

technical field [0001] The invention belongs to the field of elevators, and in particular relates to a sprocket-driven lift elevator. Background technique [0002] For the vertical elevator used in multi-storey buildings, the most widely used is the traction elevator. Its working principle is that the friction force between the traction machine wheel and the cable acts on the cable, and the cable pulls the car to move up and down the elevator shaft. . This elevator has three principle defects; [0003] First, the friction problem: [0004] 1. Limited by the friction between the traction machine wheel and the cable, the load of the elevator is affected; [0005] 2. In order to maintain the friction between the wheel and the cable, keep the surface of the cable dry and cause the cable to wear and break; [0006] 3. The change of the friction force during the elevator operation makes the counterweight and the car lose balance, causing the car or the counterweight to overspe...

AI Technical Summary

Problems solved by technology

[0006] 3. The friction force changes during the operation of the elevator, causing the counterweight and the car to lose balance, causing the car or the counterweight to overspeed, rushing to the top and squatting at the bottom

[0008] 1. The breakage of the cable leads to the sudden loss of the traction force of the car, causing the car to overspeed and fall

[0009] 2. In order to increase the traction force, it is necessary to increase the cable tension, which will inevitably increase the weight of the counterweight and the car itself

[0010] 3. The size and material of the car and counterweight increase

Lead to increased costs and take up valuable space in the shaft, increasing the risk of the entire system

[0011] Third, passive operation, passive safety issues:

[0015] 4. The traction braking force is faulty, and the speed limiter does not work if it does not reach the overspeed condition. It is also necessary to install a rope clamp to prevent the car from moving accidentally

There are many safety components in the whole system, which can easily lead to more accidents

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