Efficient traction structure of double-counterweight elevator

Abstract

The utility model relates to the technical field of elevators, in particular to an efficient traction structure of a double-counterweight elevator, which comprises a traction machine and a lift car, the traction machine is mounted on a maintenance platform, the maintenance platform is positioned at the top end of an elevator shaft, a traction wheel is fixed on the traction machine, a traction steel belt is wound on the traction wheel, and the lift car is fixed on the traction machine. A suspension guide wheel is further fixed to the maintenance platform, a suspension steel belt is wound on the suspension guide wheel, the lift car is located in the lift shaft, two car top wheels are arranged on the lift car and correspondingly connected with the suspension steel belt and the traction steel belt respectively, and the problems that in the prior art, a double-counterweight lift is poor in bearing capacity, the burden of high loads on the guide wheel is large, and the lift car is inconvenient to lift are solved. And local excessive wear is further generated, so that the maintenance interval is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to a high-efficiency traction structure of a double-counterweight elevator. Background Art

[0002] Double counterweight elevator is a special type of elevator design, which is characterized by the use of two sets of counterweight devices. In conventional elevator design, the counterweight device is an important component of the elevator system. Its main function is to balance the weight of the elevator car and help the elevator run more smoothly and efficiently.

[0003] Double counterweight elevators can further optimize the performance of elevators by adding a counterweight device. This design may help reduce energy consumption during elevator operation, increase the elevator's carrying capacity, or in some cases, improve the elevator's riding comfort.

[0004] However, the design and manufacture of double counterweight elevators are usually more complicated than conventional elevators, requiring more space and more precise adjustments. Therefore, this type of elevator is usually only used in specific high-performance requirements or special application scenarios.

[0005] Compared with traditional single-counterweight elevators, the double-counterweight design of double-counterweight elevators can better balance the weight of the elevator car and the load, making the elevator run more smoothly and reducing vibration and noise. Since the double counterweight design can better balance the weight of the elevator, the power required for the elevator motor will also be reduced accordingly, which helps to save energy and reduce operating costs. Secondly, double-counterweight elevators can carry heavier loads than single-counterweight elevators and are suitable for places where heavy objects or large numbers of people need to be carried. Double-counterweight elevators require counterweight systems to be installed on both sides of the elevator. Therefore, in the reserved elevator shaft, due to the design and structural complexity of the double counterweight system, more space is required for the operation of the double counterweight system and for easy maintenance, which will further compress the car space and have a greater impact on the car capacity, or design a counterweight system with limited size while keeping the car size unchanged.

[0006] The double counterweight elevator with announcement number CN115744555A comprises a traction machine, a car, a first guide wheel group, a second guide wheel group, a first steel wire rope, a second steel wire rope, a first counterweight and a second counterweight; one end of the first steel wire rope is connected to the car, and the other end is connected to the first counterweight through the traction machine and the first guide wheel group; one end of the second steel wire rope is connected to the car, and the other end is connected to the second counterweight through the traction machine and the second guide wheel group; the first counterweight and the second counterweight are arranged on both sides of the car and in the opposite direction of movement of the car, and when the car intersects with the two counterweights, the local space between the car and the first counterweight The pressure increase value is equal to the local pressure increase value in the space between the car and the second counterweight. Although this technical structure solves the shaking problem caused by the intersection of the elevator car and the counterweight by the equal and opposite impact forces generated by the increase in air pressure between the counterweights on both sides, the technical device adopts the design of rear-mounted double counterweights, which occupies too much shaft space, resulting in a reduction in the usable area of ​​the car depth, and the central traction machine is directly connected to the guide wheel and the counterweight device. Although it can make the double counterweight load more uniform, excessive load will be directly applied to the guide wheel, making it extremely burdened, and then causing the problem of local excessive wear. Utility Model Content

[0007] The utility model provides an efficient traction structure for a double-counterweight elevator, which solves the problem that the double-counterweight elevator in the prior art has poor bearing capacity, high loads impose a great burden on the guide wheels, and then local excessive wear occurs, resulting in shortened maintenance intervals.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A high-efficiency traction structure of a double-counterweight elevator comprises a traction machine and a car. The traction machine is installed on a maintenance platform, and the maintenance platform is located at the top of the elevator shaft. The traction machine is fixed with a traction wheel, and a traction steel belt is wound around the traction wheel. The maintenance platform is also fixed with a suspension guide wheel, and a suspension steel belt is wound around the suspension guide wheel. The car is located in the elevator shaft, and two car top wheels are provided on the car, which are respectively connected to the suspension steel belt and the traction steel belt.

[0010] Preferably, the traction machine and the suspension guide wheel are respectively located at two ends of the maintenance platform, the traction wheel is coaxially fixed with the output shaft of the traction machine, the traction wheel and the suspension guide wheel are symmetrically arranged on the surface of the maintenance platform with the car as the center, and the traction wheel and the suspension guide wheel are located in the same plane.

[0011] Preferably, the car top wheels are located on both sides of the car top, counterweight devices are provided on both sides of the car outside, the counterweight device is a rectangular sheet structure, a counterweight wheel is provided on the top of the counterweight device, and the counterweight wheel is fixed on the counterweight device.

[0012] Preferably, one end of the traction steel belt passes downward from the traction wheel through the maintenance platform and is first connected to the bottom of the car top wheel on the same side, and then connected to the bottom of the other car top wheel. Then, the traction steel belt passes upward through the maintenance platform and the end is connected to the second fixed end of the traction steel belt close to the suspension guide wheel.

[0013] Preferably, after the other end of the traction steel belt passes downward from the traction wheel through the maintenance platform and is wrapped around the bottom of the counterweight wheel on the same side, the traction steel belt passes upward through the maintenance platform and is connected to a fixed end of the traction steel belt close to the traction machine.

[0014] Preferably, one end of the suspension steel belt passes downward from the suspension guide wheel through the maintenance platform and is first connected with the bottom of the car top wheel on the same side, and then connected with the bottom of the other car top wheel. Then, the suspension steel belt passes upward through the maintenance platform, and the end is fixed to the second end of the suspension steel belt close to the traction machine.

[0015] Preferably, after the other end of the suspension steel belt passes downward through the maintenance platform from the suspension guide wheel and is wrapped around the bottom of the counterweight wheel on the same side, the suspension steel belt passes upward through the maintenance platform and is connected to a fixed end of the suspension steel belt close to the suspension guide wheel.

[0016] Preferably, the elevator shaft walls on both sides of the car are respectively provided with guide rail frames, counterweight guide rails are provided in the guide rail frames, the counterweight guide rails and the counterweight device are matched in pairs, the counterweight device is installed in the guide rail frames and is slidably connected to the counterweight guide rails, and the counterweight device can slide up and down along the counterweight guide rails.

[0017] Preferably, a car guide rail is provided between the car and the guide rail frame, the car guide rail is matched and connected with the car, and the car can move up and down along the car guide rail.

[0018] Preferably, the car guide rails and the counterweight guide rails are parallel to each other and perpendicular to the ground.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The utility model provides a high-efficiency traction structure of a double-counterweight elevator, which is directly connected to two car top wheels at the same time through a single-sided traction steel belt or a suspension steel belt, thereby alleviating the problem of excessive wear caused by a single-layer steel belt corresponding to one car top wheel, and the heavy load-bearing burden of a single car top wheel. The two car top wheels simultaneously bear the traction steel belt and the suspension steel belt, so that the load-bearing balance of the traction steel belt and the suspension steel belt is better, thereby making the car stability better and reducing the longitudinal shaking of the car. When the utility model is working, there are four traction steel belts between the traction machine and the car and four suspension steel belts between the suspension guide wheel and the car. When lifting and lowering the car, the simultaneous action of multiple suspension steel belts or traction steel belts can greatly improve the load-bearing capacity of the car. Secondly, the traction ratio of the device of the utility model is 2:1. Compared with the existing device, the load-bearing capacity of the device of the utility model is better with the same traction machine power. Therefore, the device of the utility model has excellent load-bearing capacity and good longitudinal stability, and is suitable for use as a freight elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a schematic diagram of an elevator traction structure according to an embodiment of the present invention.

[0022] Figure 2 The figure is a schematic top view of the overall structure of an embodiment of the utility model.

[0023] In the figure: traction machine 1, traction wheel 2, traction steel belt fixed end 1 3, traction steel belt 4, counterweight wheel 5, counterweight device 6, car top wheel 7, suspension guide wheel 8, suspension steel belt fixed end 1 9, suspension steel belt 10, traction steel belt fixed end 2 11, suspension steel belt fixed end 2 12, car 13, elevator shaft 14, car door 15, counterweight guide rail 16, car guide rail 17, guide rail frame 18, maintenance platform 19. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Compared with traditional single counterweight elevators, the double counterweight design of double counterweight elevators can better balance the weight of the elevator car and the load, making the elevator run more smoothly and reducing vibration and noise. Since the double counterweight design can better balance the weight of the elevator, the power required by the elevator motor will be reduced accordingly, which helps to save energy and reduce operating costs. Secondly, double counterweight elevators can carry heavier loads than single counterweight elevators and are suitable for places where heavy objects or large numbers of people need to be carried. Double counterweight elevators require counterweight systems to be installed on both sides of the elevator. Therefore, in the reserved elevator shaft, due to the design and structural complexity of the double counterweight system, more space is required for the operation of the double counterweight system and for easy maintenance, which will further compress the car space and have a greater impact on the car capacity. Secondly, double counterweight elevators are not suitable for buildings with limited space.

[0026] The double-counterweight elevator of the prior art comprises a traction machine, a car, a first guide wheel group, a second guide wheel group, a first steel wire rope, a second steel wire rope, a first counterweight, and a second counterweight; one end of the first steel wire rope is connected to the car, and the other end is connected to the first counterweight through the traction machine and the first guide wheel group; one end of the second steel wire rope is connected to the car, and the other end is connected to the second counterweight through the traction machine and the second guide wheel group; the first counterweight and the second counterweight are arranged on both sides of the car and in the opposite direction of movement of the car, and when the car intersects with the two counterweights, the local pressure increase value in the space between the car and the first counterweight is equal to the pressure increase value between the car and the second counterweight The local pressure increase value in the space is the same. Although this technical structure solves the shaking problem caused by the intersection of the elevator car and the counterweight by the impact force of equal size and opposite direction generated by the increase of air pressure between the counterweights on both sides, the technical device adopts the design of rear-mounted double counterweights, which occupies too much shaft space, resulting in a reduction in the usable area of ​​the car depth, and the central traction machine is directly connected to the guide wheel and the counterweight device. Although it can make the double counterweight load more uniform, the excessive load will be directly applied to the guide wheel, making it extremely burdened, and then causing the problem of local excessive wear. In order to solve the above problems, the present embodiment is provided.

[0027] Reference Figure 1 and Figure 2 For this embodiment, Figure 1 Schematic diagram of the elevator traction structure of this embodiment. Figure 2 This is a schematic top view of the overall structure of this embodiment. This embodiment is a high-efficiency traction structure of a double-counterweight elevator, including a traction machine and a car. The traction machine is installed on a maintenance platform, and the maintenance platform is located at the top of the elevator shaft. The traction machine is fixed with a traction wheel, and a traction steel belt is wound around the traction wheel. The maintenance platform is also fixed with a suspension guide wheel, and a suspension steel belt is wound around the suspension guide wheel. The car is located in the elevator shaft, and two car top wheels are provided on the car, which are respectively connected to the suspension steel belt and the traction steel belt.

[0028] The design of the high-efficiency traction structure of this double-counterweight elevator ensures the stability and efficiency of the elevator during operation. The traction machine provides a strong upward and downward force for the car through the cooperation of the traction wheel and the traction steel belt. At the same time, the setting of the suspension guide wheel and the suspension steel belt provides a stable suspension support for the car, further enhancing the safety of the elevator.

[0029] The traction machine is designed with advanced variable frequency speed regulation technology, which enables the elevator to remain stable during start-up, operation and stop, greatly reducing passengers' discomfort.

[0030] In addition, the interior of the elevator car uses sound insulation materials and shock-absorbing devices to effectively reduce the noise and vibration during the operation of the elevator, providing passengers with a more comfortable riding environment. At the same time, the door locks and safety devices of the elevator car have also been strictly tested and optimized to ensure the safety of passengers during the operation of the elevator.

[0031] We have also carefully considered the design of the elevator shaft. A maintenance platform is set up on the top of the elevator shaft to facilitate the maintenance and inspection of the traction machine and suspension guide wheel. At the same time, protective nets and lighting equipment are set up around the elevator shaft to ensure the safety of the staff during the maintenance process.

[0032] The present embodiment provides a high-efficiency traction structure of a double-counterweight elevator, which is directly connected to two car top wheels by a single-sided traction steel belt or a suspension steel belt, thereby alleviating the problem of excessive wear caused by a single-layer steel belt corresponding to one car top wheel. The two car top wheels simultaneously bear the traction steel belt and the suspension steel belt, so that the load-bearing balance of the traction steel belt and the suspension steel belt is better, thereby making the car more stable and reducing the longitudinal shaking of the car. When the present embodiment is working, there are four traction steel belts between the traction machine and the car and four suspension steel belts between the suspension guide wheel and the car. When lifting and lowering the car, the simultaneous action of multiple suspension steel belts or traction steel belts can greatly improve the load-bearing capacity of the car. Secondly, the traction ratio of the device of the present embodiment is 2:1. Compared with the existing device, the device of the present embodiment has a better load-bearing capacity with the same traction machine power. Therefore, the device of the present embodiment has excellent load-bearing capacity and better longitudinal stability, and is suitable for use as a freight elevator.

[0033] The traction machine and the suspension guide wheel are respectively located at the two ends of the maintenance platform, the traction wheel is coaxially fixed with the output shaft of the traction machine, the traction wheel and the suspension guide wheel are at the same distance from the surface of the maintenance platform, and the traction wheel and the suspension guide wheel are located in the same plane. In this embodiment, since the suspension guide wheel and the traction wheel need to bear a large gravity from the car, the suspension guide wheel and the traction wheel are both raised and fixed above the maintenance platform to increase the force bearing area and avoid damage to the maintenance platform. In addition, the suspension guide wheel and the traction wheel must be located at the same height, and the suspension guide wheel and the traction wheel are located at both ends of the maintenance platform, and the car is located in the elevator shaft between the suspension guide wheel and the traction wheel. Secondly, in order to ensure that the load error of the suspension steel belt and the traction steel belt is within a certain range and avoid the problem of unstable elevator operation caused by excessive wear of the suspension steel belt or the traction steel belt due to the load error, the suspension guide wheel and the traction wheel must be located at the same height and must be located in the same vertical plane, which is perpendicular to the maintenance platform.

[0034] The car top wheels are located on the top of the car and are arranged side by side at intervals. Counterweight devices are provided on both sides of the outside of the car. The counterweight device is a rectangular sheet structure. A counterweight wheel is provided on the top of the counterweight device. The counterweight wheel is fixed integrally with the counterweight device.

[0035] One end of the traction steel belt passes downward from the traction wheel through the maintenance platform and is first connected to the bottom of the car top wheel on the same side, and then to the bottom of the other car top wheel. The traction steel belt passes upward through the maintenance platform, and the end is connected to the traction steel belt fixed end 2 near the suspension guide wheel. The other end of the traction steel belt passes downward from the traction wheel through the maintenance platform and is connected to the bottom of the counterweight wheel on the same side. The traction steel belt passes upward through the maintenance platform and is connected to the traction steel belt fixed end 1 near the traction machine.

[0036] With the precise arrangement of the traction steel belt, the operating efficiency and safety of the elevator have been significantly improved. The selection of the traction steel belt has been strictly controlled in terms of material and process, ensuring its excellent wear resistance, tensile strength and stability. This not only ensures the smooth operation of the elevator during long-term use, but also reduces maintenance costs.

[0037] The design of the traction wheel adopts advanced power transmission technology to ensure that the traction steel belt is evenly stressed during the driving process, reducing the vibration and noise caused by uneven stress. At the same time, the layout of the car top wheel and the counterweight wheel has been repeatedly tested and verified to achieve the best traction effect. The fixed end 1 and the fixed end 2 of the traction steel belt are both equipped with high-strength connectors, and are connected by precise welding or bolts to ensure the stable connection between the traction steel belt and the elevator system. In addition, in order to cope with possible emergencies, the design also takes into account the emergency brake device to ensure that the elevator can stop quickly in the event of an accident to ensure the safety of passengers.

[0038] One end of the suspension steel belt passes downward from the suspension guide wheel through the maintenance platform and is first connected to the bottom of the car top wheel on the same side, and then connected to the bottom of the other car top wheel. The suspension steel belt passes upward through the maintenance platform, and the end is connected to the second suspension steel belt fixed end near the traction machine. The other end of the suspension steel belt passes downward from the suspension guide wheel through the maintenance platform and is connected to the bottom of the counterweight wheel on the same side. The suspension steel belt passes upward through the maintenance platform and is connected to the first suspension steel belt fixed end near the suspension guide wheel.

[0039] One end of the suspension steel belt is guided by the suspension guide wheel, passes through the maintenance platform, and is connected to the bottom of the car top wheel. This step ensures the stability and safety of the elevator car during the lifting process.

[0040] The other end of the suspension steel belt is connected in another way. It extends downward from the suspension guide wheel, passes through the maintenance platform again, and wraps around the bottom of the counterweight wheel. This layout not only enhances the balance of the elevator system, but also optimizes the power transmission efficiency of the elevator during operation.

[0041] After completing these delicate connections, the end of the suspension steel belt is connected to the second fixed end of the suspension steel belt close to the traction machine to form a stable support structure. This design ensures that when the elevator is running at high speed or carrying heavy objects, the suspension steel belt can withstand sufficient tension to ensure the safe operation of the elevator.

[0042] Similarly, the other end of the suspension steel belt passes through the maintenance platform and is connected to the bottom of the counterweight wheel, then passes upward through the maintenance platform and is connected to the fixed end of the suspension steel belt near the suspension guide wheel. This symmetrical layout and connection method not only enhances the stability of the elevator system, but also increases its service life.

[0043] The maintenance platform also plays a key role in the daily maintenance and inspection of elevators. It provides a convenient inspection channel, allowing staff to easily inspect and repair key components such as suspension steel belts, car top wheels, counterweight wheels, etc., to ensure the normal operation of the elevator system.

[0044] The elevator shaft walls on both sides of the car are respectively provided with guide rail frames, and counterweight guide rails are provided in the guide rail frames. The counterweight guide rails match the counterweight device. The counterweight device is installed in the guide rail frames and is slidably connected with the counterweight guide rails. The counterweight device can slide up and down along the counterweight guide rails. A car guide rail is also provided between the car and the guide rail frame. The car guide rails match and connect with the car, and the car can move up and down along the car guide rails. The car guide rails and counterweight guide rails are parallel to each other and are perpendicular to the ground. The guide rail frame includes counterweight guide rails and car guide rails. In order to avoid impact on the counterweight device when the elevator starts and stops, thereby causing the car to shake, a counterweight guide rail is designed. The counterweight guide rails are fixed on both sides of the elevator shaft, and the counterweight device is slidably fixed in the counterweight guide rails. There are two counterweight guide rails on the same side. The counterweight device is embedded between the two counterweight guide rails and can slide freely. The matching design of the counterweight device and the counterweight guide rails causes the counterweight device to produce impact and shake when the car starts and stops at high speed, while the counterweight guide rails limit the lateral and longitudinal shaking of the counterweight device, thereby improving the operating stability of the car. The car guide rails are also located on both sides of the elevator shaft. The purpose is to further limit the longitudinal movement of the car and improve the operating stability of the car.

[0045] In order to ensure the smooth and safe operation of the elevator, a precise balance adjustment system is used between the car and the counterweight device. This system monitors the weight distribution of the car and the counterweight device in real time through precise sensors, and automatically adjusts the position of the counterweight device to ensure the dynamic balance of the elevator during the lifting process.

[0046] At the bottom of the car, a set of shock-absorbing devices are installed, which can effectively absorb the impact force generated when the elevator starts, stops or encounters emergency braking, thereby reducing the vibration and impact on the elevator structure and passengers. At the same time, the design of the shock-absorbing device also takes into account the convenience of elevator maintenance, making it convenient for maintenance personnel to inspect and replace it when necessary.

[0047] The beneficial effects of this embodiment are:

[0048] The present embodiment provides a high-efficiency traction structure of a double-counterweight elevator, which is directly connected to two car top wheels by a single-sided traction steel belt or a suspension steel belt, thereby alleviating the problem of excessive wear caused by a single-layer steel belt corresponding to one car top wheel. The two car top wheels simultaneously bear the traction steel belt and the suspension steel belt, so that the load-bearing balance of the traction steel belt and the suspension steel belt is better, thereby making the car more stable and reducing the longitudinal shaking of the car. When the present embodiment is working, there are four traction steel belts between the traction machine and the car and four suspension steel belts between the suspension guide wheel and the car. When lifting and lowering the car, the simultaneous action of multiple suspension steel belts or traction steel belts can greatly improve the load-bearing capacity of the car. Secondly, the traction ratio of the device of the present embodiment is 2:1. Compared with the existing device, the device of the present embodiment has a better load-bearing capacity with the same traction machine power. Therefore, the device of the present embodiment has excellent load-bearing capacity and better longitudinal stability, and is suitable for use as a freight elevator.

[0049] In addition to the above-mentioned embodiments, within the scope disclosed in the claims and the specification of the utility model, the technical features or technical data of the utility model can be reselected and combined to form new embodiments, which should also be regarded as specific embodiments of the utility model and within the protection scope of the utility model.

Claims

1. A high-efficiency traction structure for a double-counterweight elevator, characterized in that: It includes a traction machine and a car. The traction machine is installed on a maintenance platform. The maintenance platform is located at the top of the elevator shaft. The traction machine is fixed with a traction wheel. The traction wheel is wound with a traction steel belt. The maintenance platform is also fixed with a suspension guide wheel. The suspension guide wheel is wound with a suspension steel belt. The car is located in the elevator shaft. Two car top wheels are provided on the car, which are respectively connected with the suspension steel belt and the traction steel belt.

2. The high-efficiency traction structure of a double-counterweight elevator according to claim 1, characterized in that: The traction machine and the suspension guide wheel are respectively located at two ends of the maintenance platform. The traction wheel is coaxially fixed with the output shaft of the traction machine. The traction wheel and the suspension guide wheel are symmetrically arranged on the surface of the maintenance platform with the car as the center, and the traction wheel and the suspension guide wheel are located in the same plane.

3. The high-efficiency traction structure of a double-counterweight elevator according to claim 1, characterized in that: The car top wheels are located on both sides of the car top, and counterweight devices are arranged on both sides of the car exterior. The counterweight device is a rectangular sheet structure, and a counterweight wheel is arranged on the top of the counterweight device, and the counterweight wheel is fixed on the counterweight device.

4. The high-efficiency traction structure of a double-counterweight elevator according to claim 1, characterized in that: One end of the traction steel belt passes downward from the traction wheel through the maintenance platform and is first connected to the bottom of the car top wheel on the same side, and then connected to the bottom of the other car top wheel. The traction steel belt then passes upward through the maintenance platform and the end is connected to the second fixed end of the traction steel belt close to the suspension guide wheel.

5. The high-efficiency traction structure of a double-counterweight elevator according to claim 1 or 4, characterized in that: After the other end of the traction steel belt passes downward through the maintenance platform from the traction wheel and is connected to the traction wheel at the bottom of the counterweight wheel on the same side, the traction steel belt passes upward through the maintenance platform and is connected to a fixed end of the traction steel belt close to the traction machine.

6. The high-efficiency traction structure of a double-counterweight elevator according to claim 1, characterized in that: One end of the suspension steel belt passes downward from the suspension guide wheel through the maintenance platform and is first connected with the bottom of the car top wheel on the same side, and then connected with the bottom of the other car top wheel. The suspension steel belt then passes upward through the maintenance platform, and the end is fixed to the second end of the suspension steel belt close to the traction machine.

7. The high-efficiency traction structure of a double-counterweight elevator according to claim 1 or 6, characterized in that: After the other end of the suspension steel belt passes downward through the maintenance platform from the suspension guide wheel and is connected to the traction wheel at the bottom of the counterweight wheel on the same side, the suspension steel belt passes upward through the maintenance platform and is connected to a fixed end of the suspension steel belt close to the suspension guide wheel.

8. The high-efficiency traction structure of a double-counterweight elevator according to claim 3, characterized in that: The elevator shaft walls on both sides of the car are respectively provided with guide rail frames, and counterweight guide rails are arranged in the guide rail frames. The counterweight guide rails and the counterweight device are matched in pairs. The counterweight device is installed in the guide rail frames and is slidably connected with the counterweight guide rails. The counterweight device can slide up and down along the counterweight guide rails.

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