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The main structure of the rail lift

Author: South Canton mechanical time: 2017-10-26 Source: Unknown
Abstract: The main structure and function of the guide rail elevator: The mechanical part of the guide rail elevator mainly includes three parts: the lifting device, the track device and the belt changing device. The lifting device is mainly used to suspend the lifted person, which is the most core part of the entire mechanism. Track device ...

The main structure and function of the guide rail elevator: the mechanical part of the guide rail elevator mainly includes three parts of the lifting device, the track device and the belt changing device, of which the lifting device is mainly used to suspend the lifted person, which is the most core part of the entire mechanism, the track device The function is mainly to provide a moving trajectory to make the operation smoother. The belt changing device is used to switch the track when the elevator is going through the door. The internal structure of the lifting device is mainly composed of a gear mechanism, a bracket, a worm gear, a guide mechanism, a boom, an upper and a lower casing. Gear mechanism The gear mechanism mainly includes large and small gears, a winding wheel, a central shaft, and a safety device composed of a stop buckle and a torsion spring.

Rail lift

Closed gear transmission is used. Both the large and small gears are made of steel. After quenching and tempering, it belongs to soft tooth surface. Since the common failure form of closed soft tooth surface gear transmission is tooth surface pitting, the tooth surface is fatigued during design. For strength calculation, check the tooth root bending fatigue strength. Bracket The bracket is used to fix and support all the mechanical parts and some electrical components inside the lifting casing. It is mainly welded from side plates, connecting pipes and connecting pieces. The materials are selected, and the thickness of the two side plates is also reduced. The weight of the bracket is designed with many craft holes on both sides. Worm worm because the worm gear has the advantages of large transmission ratio, compact structure, small impact load, stable transmission and low noise, and has the characteristics of reverse self-locking. It can ensure that the transmission mechanism can self-lock when the motor is powered off during patient transportation, so a worm gear reducer is selected. The involute worm is made of steel and its spiral surface is quenched to improve transmission efficiency and wear resistance. The material of the worm gear is polyformaldehyde. Plastic worm gear has the advantages of good processing economy, smooth transmission, vibration absorption and noise reduction, light weight, wear resistance and self-lubrication, which makes the design of the lift more humane.

Guide mechanism The guide mechanism is mainly composed of a guide plastic pipe, a guide bracket, a compression spring, a safety plug, a guide housing, and a guide shaft. It is a half-section view of the guide mechanism, and a narrow gap is formed between the two guide plastic pipes. The belt protrudes from the box through this narrow slit to prevent the cloth belt from being scrambled and serves as a guide. The safety plug is supported by a guide bracket and a compression spring. In order to prevent the compression spring from losing its stability after a force is applied, a small guide rod is designed on the safety plug. The clearance between the small guide rod and the spring is designed according to the table. The boom shaft is welded, and a boom hook is installed at each end. The materials are selected and subjected to quenching and tempering. Together with the hook of the lower shell of the box, three suspension points are formed. The soft lifter is used to lift the lifted person. The load-bearing weight of the boom, in order to make the lifted person be comfortable when riding, the reference table of the distance between the two boom hooks lists the relevant data of the horizontal size as a design reference. The balance bar is used to maintain the balance of the lifting device. Materials Designed as a hollow tube, reducing the overall weight of the boom.

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