CN111573483A - Double traction sheave drive freight elevator - Google Patents

Abstract

A double traction sheave-driven freight elevator includes a car device, a counterweight device, and a traction system with a traction machine, wherein the traction machine includes a traction motor, and two synchronously driven and controlled by the traction motor. There are two traction sheaves, the traction system further includes two sets of traction ropes, the upper part of the car device is respectively fixed with two sets of car return sheaves, and the upper part of the counterweight device is provided with two sets of opposite return sheaves , after each group of the traction ropes respectively bypasses the corresponding traction sheave, the two ends thereof respectively bypass the corresponding car return sheave and the corresponding pair of return sheaves and then respectively connect with the hoistway The rope head frame on the top is fixedly connected. The invention provides a double traction sheave driving freight elevator, two traction sheaves, two sets of symmetrical traction systems are realized, the traction force is increased, and it is suitable for large tonnage elevators; it is convenient to realize the up and down of the car device and the counterweight device Corresponding to the center line, the space arrangement is more reasonable.

Description

Double traction sheave drive freight elevator

technical field

The invention relates to a double traction sheave driving freight elevator.

Background technique

In the prior art, almost all freight elevators usually use a traction motor with a single traction sheave, which has a small traction force; secondly, in the elevator spatial layout, the center of the counterweight device is offset from the center of the car device. For the elevator with double doors in the front, there may be a problem of interference between the counterweight device and the door machine that opens the door on one side.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a double traction sheave-driven freight elevator.

In order to solve the above technical problems, the technical solution adopted in the present invention is: a double traction sheave-driven freight elevator, comprising a car device, a counterweight device, and a traction system with a traction machine, and the traction machine includes a traction machine. A traction motor, two traction sheaves driven and controlled by the traction motor synchronously, the traction system further includes two sets of traction ropes, and two sets of car return sheaves are respectively fixed on the upper part of the car device. The upper part of the counterweight device is provided with two sets of counter-returning sheaves. After each group of the hoisting ropes respectively bypasses the corresponding traction sheave, its two ends respectively bypass the corresponding car-returning sheaves. After returning to the sheaves with the corresponding pairs, they are respectively fixedly connected to the rope head frames at the top of the hoistway.

In some embodiments, the two sets of the hoisting ropes are arranged symmetrically and adopt a 2:1 roping method.

In some embodiments, three sets of car frame guide rails formed by two opposite guide rails are evenly arranged in the elevator shaft, and the car device is slidably arranged in the elevator shaft through the three sets of the car frame guide rails .

In some embodiments, a gearbox is provided between the traction motor and the two traction wheels, the gearbox adopts a worm gear and a worm gear speed change, and the gearbox includes a worm wheel, two coaxially fixed on the The gearbox output shafts on both sides of the worm wheel, the two gearbox output shafts and the worm wheel are integrally formed to form a whole, and the two traction wheels are respectively fixed on the corresponding gearbox output shafts, and The two traction wheels are respectively symmetrically arranged on both sides of the axis line of the output shaft of the traction motor.

In some embodiments, the traction motor faces the middle group of the three sets of the guide rails of the car frame, and the axis line of the output shaft of the traction motor is aligned with the middle of the three sets of the guide rails of the car frame The guide rails of the group extend perpendicularly.

In some embodiments, each group of the car return sheaves has two, and the two groups of the car return sheaves are symmetrically arranged on both sides of the middle group of the three groups of the car frame guide rails .

In certain embodiments, the middle group of the three groups of the car frames is directly opposite the upper and lower centerlines of the counterweight, each group of the pair of re-entry sheaves has one, and two of the pair of re-entry The sheaves are symmetrically arranged on the counterweight device.

The scope of the present invention is not limited to the technical solutions formed by a specific combination of the above technical features, but also covers other technical solutions formed by any combination of the above technical features or their equivalents. For example, a technical solution or the like is formed by replacing the above-mentioned features with the technical features disclosed in this application (but not limited to) with similar functions.

Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: the present invention provides a double traction sheave driving freight elevator, two traction sheaves, two sets of symmetrical traction systems are realized, and the traction force increases Large, suitable for large-tonnage elevators; it is convenient to realize that the upper and lower center lines of the car device and the counterweight device correspond, and the space arrangement is more reasonable.

Description of drawings

Accompanying drawing 1 is elevator shaft structure diagram;

Accompanying drawing 2 is the well plan layout drawing;

Accompanying drawing 3 is the schematic diagram of the plane roping on the counterweight side;

Accompanying drawing 4 is the schematic diagram of car side plane roping;

Accompanying drawing 5 is the schematic diagram of three-dimensional roping in space;

6 is a schematic structural diagram of a three-dimensional traction motor;

Among them: 1. Car device; 11. Car returning sheave; 2. Counterweight device; 21. Counter-returning sheave; 3. Traction system; 31. Traction motor; 32. Traction sheave; 33, Traction rope; 4. Car frame guide rail.

Detailed ways

As shown in Figures 1-6, a double traction sheave driven freight elevator includes a car device 1, a counterweight device 2, and a traction system 3 with a traction motor 31. There are also electrical control systems, safety caliper braking systems, etc., which will not be repeated.

The traction system also includes two traction sheaves 32 and two sets of traction ropes 33 that are synchronously driven and controlled by the traction motor 31 . Two sets of paired return sheaves 21 are provided. After each set of traction ropes 33 respectively bypasses the corresponding traction sheave 32, its two ends respectively go down and then bypass the corresponding car return sheave 11 and the corresponding pair of sheaves. After returning to the rope pulley 21, it is then fixedly connected to the rope head frame at the top of the hoistway.

The two sets of hoisting ropes 33 are symmetrically arranged on both sides of the hoisting motor 31 and adopt a 2:1 rope winding method. The two sets of traction ropes 33 work simultaneously to form two sets of synchronous traction drive systems, which increases the traction force, and the 2:1 rope winding method is simple and reduces the volume of the traction system, saving costs and reducing energy consumption.

Three sets of car frame guide rails 4 formed by two opposite guide rails are evenly arranged in the elevator shaft. The three groups of car frame guide rails 4 are easier to install symmetrically with the traction system 3 in this embodiment, and the traction motor 31 faces the middle group of the three groups of car frame guide rails 4, and the axis line of the output shaft of the traction motor 31 The two sets of traction ropes 33 are symmetrically arranged on both sides of the traction motor 31 , perpendicular to the extending direction of the guide rails of the middle set of the three sets of car frame guide rails 4 . At the same time, the up and down movement of the car is more stable and safe.

A gearbox is arranged between the traction motor 31 and the two traction wheels 32. The gearbox adopts a worm gear and a worm gear. The gearbox includes a worm wheel, two gearbox output shafts coaxially fixed on both sides of the worm wheel, and two gearboxes. The output shaft and the worm gear are integrally formed to form a whole, the two traction sheaves 32 are respectively fixed on the corresponding gearbox output shafts, and the two traction sheaves 32 are respectively symmetrically arranged on the two sides of the axis line of the output shaft of the traction motor 31 . side.

In this embodiment, the two traction wheels 32 are controlled by one traction motor 31 , and a gearbox is arranged between the traction motor 31 and the two traction wheels 32 . In this embodiment, the gearbox adopts a worm gear and a worm gear. The gearbox includes a worm wheel and two gearbox output shafts. The two gearbox output shafts are integrally formed on both sides of the worm wheel, and the two traction wheels 32 are fixedly arranged on the gearbox output shaft. At both ends of the formed coaxial, the two traction sheaves 32 are symmetrically arranged on both sides of the axis line of the output shaft of the traction motor 31 respectively. The worm gear speed change makes the two traction sheaves operate synchronously, which reduces the probability of elevator failure caused by the asynchronous traction sheave. At the same time, the worm gear speed change increases the transmission ratio and increases the service life of the transmission.

As shown in FIG. 2 , each group of car return sheaves 11 has two, and the two groups of car return sheaves 11 are symmetrically arranged on both sides of the middle group of the three groups of car frame guide rails 4 . The middle group of the three groups of car frames is facing the upper and lower center lines of the counterweight device 2 , each group has one pair of return sheaves 21 , and two pairs of return sheaves 21 are symmetrically arranged on the counterweight device 2 , The completely symmetrical design can avoid the offset of the center of the counterweight device and the center of the car device, causing the problem of interference between the counterweight device and the door machine, and at the same time increase the safety. The counterweight device 2 includes an upper splint, a lower splint, a column connecting the upper splint and the lower splint, and a counterweight block arranged between the columns. Two counterweight reverse rope pulleys 21 are arranged on one side of the upper splint.

The double traction sheave 32 drive improves the traction force, and the elevator load is larger. The two traction sheaves 32 and the two sets of traction ropes 33 are symmetrically centered, so that the counterweight device is centered relative to the car, thereby effectively solving the problem of freight elevator through doors. The problem of the interference between the door machine and the offset counterweight bracket makes the freight elevator more stable and safe.

The above-mentioned embodiments are only intended to illustrate the technical concept and characteristics of the present invention, and the purpose thereof is to enable those who are familiar with the art to understand the content of the present invention and implement them accordingly, and cannot limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included within the protection scope of the present invention.

Claims (7)

1. The utility model provides a two traction wheel drive cargo elevator, includes car device (1), counterweight (2), traction system (3) that have the hauler, its characterized in that: the hauler includes traction motor (31), receives two traction sheave (32) of traction motor (31) synchronous drive control, traction system (3) still includes two sets of towline (33), car device (1) upper portion is fixed with two sets of cars respectively and returns rope sheave (11), counterweight (2) upper portion is provided with two sets of heavy return rope sheave (21), every group corresponding are walked around respectively in traction rope (33) after traction sheave (32), it is corresponding respectively to walk around at its both ends the car returns rope sheave (11) and corresponding respectively with the fag end frame fixed connection at well top after returning rope sheave (21).

2. The double traction wheel drive cargo elevator according to claim 1, characterized in that: the two sets of hoisting ropes (33) are symmetrically arranged and use a ratio of 2: 1 in a rope-winding manner.

3. The double traction wheel drive cargo elevator according to claim 1, characterized in that: the elevator car device is characterized in that three sets of car frame guide rails (4) which are formed by two opposite guide rails and form a set are uniformly arranged in the elevator shaft, and the car device (1) is arranged in the elevator shaft in a sliding mode through the three sets of car frame guide rails (4).

4. The double traction wheel drive freight elevator according to claim 3, characterized in that: a gearbox is arranged between the traction motor (31) and the two traction wheels (32), the gearbox adopts a worm gear to change speed, the gearbox comprises a worm wheel and two gearbox output shafts which are coaxially fixed on two sides of the worm wheel respectively, the two gearbox output shafts and the worm wheel are integrally formed into a whole, the two traction wheels (32) are respectively fixed on the corresponding gearbox output shafts, and the two traction wheels (32) are respectively symmetrically arranged on two sides of the axial lead of the output shaft of the traction motor (31).

5. The double traction wheel drive cargo elevator according to claim 4, characterized in that: the traction motor (31) faces to the middle group of the three car frame guide rails (4), and the axial lead of the output shaft of the traction motor (31) is perpendicular to the extending direction of the guide rail of the middle group of the three car frame guide rails (4).

6. The double traction wheel drive freight elevator according to claim 5, characterized in that: each group of the car return rope wheels (11) is provided with two groups of the car return rope wheels (11), and the two groups of the car return rope wheels (11) are symmetrically arranged on two sides of the middle group in the three groups of the car frame guide rails (4).

7. The double traction wheel drive freight elevator according to claim 5, characterized in that: the middle group of the three groups of car frame guide rails (4) is opposite to the upper central line and the lower central line of the counterweight device (2), one counterweight return rope wheel (21) is arranged in each group, and the two counterweight return rope wheels (21) are symmetrically arranged on the counterweight device (2).

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