Elevator driving system

Abstract

An elevator driving system comprises a lift car, a traction main machine and a transmission mechanism, the traction main machine drives the lift car through the transmission mechanism, the transmission mechanism comprises a traction wheel, a pulley and a steel wire rope, the pulley and the steel wire rope are arranged below the traction wheel, a spiral groove is formed in the surface of the traction wheel, and the traction main machine drives the traction wheel through a chain. One end of the steel wire rope is connected with the top of the lift car, and the other end of the steel wire rope sequentially penetrates through the spiral groove and the pulley and then is connected with the bottom of the lift car. According to the principle, the elevator car does not need counterweight, the spiral groove is formed in the traction wheel for multiple winding of the steel wire rope, and therefore the friction force between the steel wire rope and the traction wheel is increased, and the steel wire rope can pull the elevator car without slipping after the traction wheel is driven; the traction wheel, the lift car and the pulley are basically located on the same straight line, and the occupied space is small.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, and in particular to an elevator drive system. Background Technology

[0002] like Figure 1 As shown, the existing elevator drive system includes a car 1, a first pulley 2, a traction sheave 3, a guide sheave 5, a second pulley 6, a wire rope 4, and a counterweight 7 mounted on the second pulley 6. One end of the wire rope 4 is anchored, and the other end of the wire rope 4 passes sequentially around the first pulley 2, the traction sheave 3, the guide sheave 5, and the second pulley 6 before being anchored. This transmission scheme requires the counterweight to be balanced with the car, and the overall structure occupies a large space. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an elevator drive system that does not require a counterweight, has a simple structure, and occupies little space.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: an elevator drive system, including a car, a traction machine, and a transmission mechanism. The traction machine drives the car through the transmission mechanism. The transmission mechanism includes a traction sheave, a pulley located below the traction sheave, and a steel wire rope. The surface of the traction sheave is provided with a spiral groove. The traction machine drives the traction sheave through a chain. One end of the steel wire rope is connected to the top of the car, and the other end of the steel wire rope passes through the spiral groove and the pulley in sequence before being connected to the bottom of the car. The principle of this utility model is as follows: the car does not require a counterweight. The spiral groove on the traction sheave allows for multiple windings of the steel wire rope, thereby increasing the friction between the steel wire rope and the traction sheave, so that the steel wire rope can pull the car without slipping after driving the traction sheave. The traction sheave, car, and pulley are basically in a straight line, occupying little space.

[0005] As an improvement, the pulley is equipped with a counterweight.

[0006] As an improvement, the traction machine is equipped with a drive sprocket, the traction wheel is equipped with a driven sprocket, and the chain is located between the drive sprocket and the driven sprocket.

[0007] The beneficial effects of this utility model compared with the prior art are:

[0008] The car does not require a counterweight. A spiral groove is set on the traction sheave for multiple windings of the wire rope, thereby increasing the friction between the wire rope and the traction sheave. This ensures that the wire rope can pull the car without slipping after the traction sheave is driven. The traction sheave, car, and pulley are basically in a straight line, occupying little space. Attached Figure Description

[0009] Figure 1 This is an existing elevator drive system.

[0010] Figure 2 This utility model relates to an elevator drive system. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings.

[0012] like Figure 2 As shown, an elevator drive system includes a car 1, a traction main unit 11, and a transmission mechanism. The traction main unit 11 drives the car 1 to move up and down through the transmission mechanism. The transmission mechanism includes a traction sheave 10, a pulley 8 located below the traction sheave 10, and a wire rope 4. The traction sheave 10 is roller-shaped, with a spiral groove on its surface. Both ends of the traction sheave 10 are mounted via bearing seats, and one end of the traction sheave 10 is equipped with a driven sprocket. The traction main unit 11 is fixed and is equipped with a driving sprocket. A chain 12 is provided between the driving sprocket and the driven sprocket, and the traction main unit 11 drives the traction sheave 10 to rotate in both directions via the chain 12. One end of the wire rope 4 is connected to the middle of the top of the car 1, and the other end of the wire rope 4 passes through the spiral groove and the pulley 8 in sequence and is connected to the middle of the bottom of the car 1. A counterweight 9 is provided on the pulley 8, and a gravity-based tensioning device is used to tighten the wire rope 4. The principle of this utility model is as follows: the car 1 does not require a counterweight. A spiral groove is set on the traction sheave 10 for multiple winding of the steel wire rope 4, thereby increasing the friction between the steel wire rope 4 and the traction sheave 10, so that the steel wire rope 4 can pull the car 1 without slipping after driving the traction sheave 10; the traction sheave 10, the car 1 and the pulley 8 are basically in a straight line, occupying little space.

Claims

1. An elevator drive system, comprising a car, a traction main unit, and a transmission mechanism, wherein the traction main unit drives the car through the transmission mechanism, characterized in that: The transmission mechanism includes a traction sheave, a pulley located below the traction sheave, and a wire rope. The surface of the traction sheave is provided with a spiral groove. The traction main unit drives the traction sheave through a chain. One end of the wire rope is connected to the top of the car, and the other end of the wire rope passes through the spiral groove and the pulley in sequence before being connected to the bottom of the car.

2. The elevator drive system according to claim 1, characterized in that: The pulley is equipped with a counterweight.

3. The elevator drive system according to claim 1, characterized in that: The traction machine is equipped with a drive sprocket, the traction wheel is equipped with a driven sprocket, and the chain is located between the drive sprocket and the driven sprocket.

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