Double-pairing heavy-duty elevator traction structure

Abstract

The utility model discloses a double pair of heavy elevator traction structure relates to elevator field, including elevator car and elevator shaft, elevator car and elevator shaft are cylindrical structure, the most upper end fixed mounting of elevator shaft has motor mounting bracket The motor mounting bracket is double -deck structure, the even number section side -by -side steel band of around has between elevator car with motor mounting bracket, at the clearance of elevator car and elevator shaft, be equipped with the counterweight that is located the both sides of motor mounting bracket just below and hang on the steel band through the pulley, motor mounting bracket installs the traction motor. Apply to circular shaft, pulley assembly and traction motor are mainly integrated on the motor mounting bracket, reduce the workload of subsequent elevator assembly, and the counterweight of both sides is driven by the traction motor through the steel band, will not cause elevator car to incline because the motion of both sides counterweight is not in step, can make full use of the traction force of motor, can make both sides counterweight keep the same height.

Description

Technical Field

[0001] This utility model relates to the field of elevators, specifically to a double counterweight elevator traction structure. Background Technology

[0002] The counterweight is crucial for the elevator car's movement, but most existing elevators use a single-sided counterweight. This results in a large counterweight block and a greater load on the steel cables or belts, potentially compressing the elevator car, reducing its size, load capacity, and comfort. While double-counterweight elevators exist, current technology only addresses the issue of excessively large counterweight frames. Since the steel belt suspending the counterweight on the other side doesn't pass through the main unit, this inevitably leads to insufficient traction force from the main unit, or unequal heights between the left and right counterweight frames. Furthermore, the counterweight must be installed after the pulley system is installed in the elevator shaft, resulting in a slower installation speed.

[0003] As disclosed in announcement number CN222204457U, "An Additional Counterweight Traction Drive Elevator," although it also adopts a double counterweight structure, the distance between the counterweight on each side and the elevator car is not equal. This results in wasted space in the elevator shaft and affects the usable space inside the car. Moreover, its double counterweight structure only has one side of the counterweight connected to the traction motor drive, which can easily lead to insufficient traction force of the motor. Furthermore, if the counterweight not connected to the traction motor drive experiences increased friction or jamming, it can easily cause the elevator car to tilt, affecting safety. Utility Model Content

[0004] The purpose of this invention is to provide a double counterweight elevator traction structure that ensures equal spacing between the counterweights on both sides of the elevator and the elevator car, thereby improving the space utilization in the elevator shaft and allowing for the use of larger elevator cars, thus increasing elevator comfort and carrying capacity. A further objective of this invention is that each counterweight is driven by a traction motor via a steel belt, avoiding the imbalance that can occur with single-sided drive, which can easily cause the elevator to tilt to one side. Another objective of this invention is that the pulley blocks are fixedly installed on each component, facilitating elevator installation and positioning. Furthermore, the motor mounting bracket, elevator car, and counterweights can be assembled during elevator manufacturing using steel belts, reducing on-site installation workload.

[0005] This utility model achieves the above-mentioned technical objectives through the following technical means:

[0006] A double counterweight elevator traction structure includes an elevator car and an elevator shaft. The elevator car and elevator shaft are cylindrical structures. A motor mounting frame is fixedly installed at the uppermost end of the elevator shaft. The motor mounting frame is a double-layer structure. An even number of parallel steel strips are wound between the elevator car and the motor mounting frame. Counterweights are located directly below the motor mounting frame on both sides and are suspended from the steel strips by pulleys. A traction motor is installed on the motor mounting frame.

[0007] Furthermore, one end of all the steel strips is fixedly installed on one side of the mounting bracket fixing block of the motor mounting bracket by a steel strip fastener. After passing under the pulley assembly symmetrically installed on the elevator car, the steel strip passes over the output shaft of the traction motor from above and then downwards.

[0008] Furthermore, a pulley assembly is installed between the lower and upper mounting portions of the mounting bracket fixing block, on the side near the mounting position of the traction motor, and half of the steel belt that passes around the output shaft of the traction motor passes around the lower part of the pulley assembly.

[0009] Furthermore, pulley assemblies are symmetrically installed on the upper part of the motor mounting bracket. The steel belt passes over the pulley assembly above and then passes downward through the steel belt through hole provided on the mounting bracket fixing block. After being installed with the counterweight, the other end of the steel belt is fixedly connected to the mounting bracket fixing block.

[0010] Furthermore, the steel belt, which passes halfway around the output shaft of the traction motor, passes downward through the mounting bracket fixing block and connects to the counterweight, and the other end is fixedly connected to the mounting bracket fixing block through the steel belt retainer.

[0011] Furthermore, the motor mounting bracket is divided into upper and lower layers. The upper layer of the motor mounting bracket is a pulley mounting block, and the lower layer of the motor mounting bracket is a mounting bracket fixing block. A mounting bracket support column connects the pulley mounting block and the mounting bracket fixing block.

[0012] Furthermore, the motor mounting bracket is provided with two pulley mounting blocks, which are connected by mounting block connecting strips. Between the pulley mounting blocks, on both sides of the pulley mounting blocks, there are pulley assemblies consisting of pulleys with the same number as the steel belt.

[0013] Preferably, the traction motor is located between the pulley mounting block and the mounting bracket fixing block, mounted on the upper surface of the mounting bracket fixing block, and the traction motor is located outside the mounting bracket support column.

[0014] Furthermore, the sum of the masses of the counterweights on both sides is equal to the mass of the elevator car, and the heights of the counterweights on both sides are equal.

[0015] Furthermore, the elevator car is provided with an outward-opening elevator door, and the opening direction of the elevator door is perpendicular to the installation direction of the motor mounting bracket.

[0016] This utility model has the following beneficial effects:

[0017] This utility model is applied in a circular shaft, integrating the main pulley assembly and traction motor on the motor mounting bracket, which reduces the workload of subsequent elevator installation. Furthermore, the counterweights on both sides are driven by the traction motor via steel belts, preventing the elevator car from tilting due to asynchronous movement of the counterweights on both sides. It can also make full use of the traction force of the traction motor, keeping the counterweights on both sides at the same height. Attached Figure Description

[0018] Figure 1 This is a front view of the traction structure of this utility model.

[0019] Figure 2 This is a top view of the elevator structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the elevator according to this utility model.

[0021] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0022] In the diagram, 1-elevator car, 2-counterweight, 3-motor mounting bracket, 31-pulley mounting block, 32-mounting block connecting strip, 33-mounting bracket fixing block, 331-lower mounting part, 332-upper mounting part, 333-steel belt through hole, 34-traction motor, 35-mounting bracket support column, 4-steel belt fixer, 5-elevator shaft, 6-pulley assembly, 61-outer pulley, 62-inner pulley, 7-steel belt. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings. It should be noted that this embodiment is based on the present technical solution and provides detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to this embodiment.

[0024] Example 1:

[0025] like Figures 1 to 4As shown, a double counterweight elevator traction structure includes an elevator car 1 and an elevator shaft 5. The elevator car 1 and the elevator shaft 5 are cylindrical structures. A motor mounting frame 3 is fixedly installed at the uppermost end of the elevator shaft 5. The motor mounting frame 3 is a double-layer structure. An even number of parallel steel belts 7 are wound between the elevator car 1 and the motor mounting frame 3. Counterweight blocks 2 are located directly below the motor mounting frame 3 on both sides and are suspended from the steel belts 7 by pulleys. A traction motor 34 is installed on the motor mounting frame 3.

[0026] The traction structure comprises an elevator car 1, two counterweights 2 symmetrically distributed vertically within the shaft 5 and moving synchronously in the same direction, and a motor mounting bracket 3 for mounting the traction motor 34 and several pulley assemblies 6. The motor mounting bracket 3 serves as the structural framework and drive unit of the entire traction system, and is fixedly installed in the top space of the elevator shaft 5.

[0027] The elevator car 1 may be equipped with an outward-opening elevator door 51, the opening direction of which is perpendicular to the length direction of the I-shaped main beam of the motor mounting bracket 3.

[0028] In this embodiment, the motor mounting frame 3 is a double-layer three-dimensional frame structure, in the shape of an I-beam. The motor mounting frame 3 pre-integrates the important components of the traction system, including the traction motor 34 and all pulley assemblies 6 except those pre-fixed on the elevator car 1 and counterweight 2. This allows the entire traction structure to be assembled and tested in the manufacturing plant without the need for drilling holes in the elevator shaft 5 to install additional pulley assemblies 6 and the traction motor 34. This simplifies the on-site installation process, shortens the construction period, and improves installation reliability.

[0029] The elevator car 1 is suspended below the motor mounting frame 3 by multiple parallel steel belts 7, while the two counterweights 2 are located in the gap space between the elevator car 1 and the shaft 5 wall, symmetrically distributed on both sides of the elevator car 1, and are simultaneously connected to the traction motor 34 through different pulley assemblies 6 and the linkage of the steel belts 7.

[0030] The motor mounting bracket 3 consists of two layers, forming a stable three-dimensional support platform. The upper layer comprises two horizontally parallel pulley mounting blocks 31, which are fixedly connected by mounting block connecting strips 32 to enhance the overall structural strength and stability. The main function of the pulley mounting blocks 31 is to provide a stable mounting base for the pulley assembly. The lower layer of the motor mounting bracket 3 is a mounting bracket fixing block 33, on which a traction motor 34 is mounted. The traction motor 34 is mounted at the upper mounting portion 332 of this mounting bracket fixing block 33.

[0031] The mounting bracket fixing block 33 and the pulley mounting block 31 are fixedly connected by two vertically installed mounting bracket support columns 35 near the outer side, forming a motor mounting bracket 3 for support and fixed installation. The fixed installation of the motor mounting bracket 3 within the elevator shaft 5 achieves the positioning and fixed installation of the traction motor 34 and multiple pulley assemblies 6. The mounting bracket fixing block 33 has three rows of mounting holes at both ends for fixed installation with the steel belt retainer 4. Two rows of closely spaced mounting holes are located on the side away from the traction motor 34, at the upper mounting part 332, while the other row of mounting holes is located below the traction motor, at the lower mounting part 331 of the mounting bracket fixing block 33. The steel belt retainer 4 fixes one end of the steel belt 7. The motor mounting bracket 3 has a hollow structure, facilitating the insertion and exit of the steel belt 7 at its position within the motor mounting bracket 3.

[0032] This invention achieves a steel strip winding method with a traction ratio of 2:1 by using a double counterweight design.

[0033] First, one end of all the steel strips 7 is fixed to the mounting hole on the side of the mounting bracket fixing stop 33 away from the traction motor 34 using the steel strip retainer 4. Starting from this fixed end, all the steel strips 7 extend vertically downwards to the top of the elevator car 1, passing under the pulley assembly 6 on one side of the elevator car 1 to the bottom of the pulley assembly 6 on the other side, and then the steel strips are lifted upwards from the outside of the pulley assembly 6 on the exiting side. This achieves a traction ratio of 2:1, so that the drive load of the traction motor 34 is only half of the load mass, thus enabling it to withstand a larger load.

[0034] The steel belt 7 continues to rise. After passing through the mounting stop 33, the steel belt 7 goes around the drive shaft of the traction motor 34 from one side above the drive shaft of the traction motor 34, and then goes down from the other side of the drive shaft of the traction motor 34.

[0035] After the steel belt 7 exits the drive shaft of the traction motor 34, it continues downward until it reaches the pulley assembly 6 located below the traction motor 34, between the upper mounting portion 332 and the lower mounting portion 331. Here, the steel belt, which originally extended together, is divided into two groups. These two groups of steel belts 7 will respectively connect to and drive the two counterweights 2 located on both sides of the car; we can name them the main engine side counterweight 2 and the non-main engine side counterweight 2, respectively.

[0036] After leaving the drive shaft of the traction motor 34, a set of steel belts 7 of the counterweight 2 on the drive unit side continues vertically downward, passes through the mounting bracket fixing stop 33, and then passes under the inner pulley 62 of the pulley assembly 6 installed at the upper end of the counterweight 2 on the drive unit side. After passing over the pulley assembly 6 installed on the counterweight 2 on the drive unit side, the steel belts 7 continue vertically upward, and their final end is firmly fixed to the mounting bracket fixing stop 33 by the steel belt retainer 4.

[0037] A set of steel belts 7 used to drive the counterweight 2 on the non-host side, after leaving the drive shaft of the traction motor 34, continues downward, passing under the outer pulley 61 of the pulley assembly 6 installed between the upper mounting part 332 and the lower mounting part 331. Continuing upward, it reaches the positions of the pulley assemblies 6 installed at both ends of the pulley mounting block 31. It first passes over the pulley assembly 6 on the pulley mounting block 31 directly above the traction motor 34, then passes downward over the pulley assembly 6 at the other end of the pulley mounting block 31, passes through the steel belt through-hole 333 provided on the mounting bracket fixing block 33, and then passes downward over the pulley assembly 6 fixedly installed on the counterweight 2 on the non-host side. Finally, its end is fixed to the mounting bracket fixing block 33 by a steel belt retainer 4.

[0038] The length of the steel strip connected to the counterweight 2 on the non-host side is greater than the length of the steel strip connected to the counterweight 2 on the host side.

[0039] Example 2:

[0040] The structure of this embodiment is the same as that of Embodiment 1, and the elevator driving process is described.

[0041] like Figures 1 to 4 As shown, a double counterweight elevator traction structure includes an elevator car 1 and an elevator shaft 5. The elevator car 1 and the elevator shaft 5 are cylindrical structures. A motor mounting frame 3 is fixedly installed at the uppermost end of the elevator shaft 5. The motor mounting frame 3 is a double-layer structure. An even number of parallel steel belts 7 are wound between the elevator car 1 and the motor mounting frame 3. Counterweight blocks 2 are located directly below the motor mounting frame 3 on both sides and are suspended from the steel belts 7 by pulleys. A traction motor 34 is installed on the motor mounting frame 3.

[0042] The traction structure comprises an elevator car 1, two counterweights 2 symmetrically distributed vertically within the shaft 5 and moving synchronously in the same direction, and a motor mounting bracket 3 for mounting the traction motor 34 and several pulley assemblies 6. The motor mounting bracket 3 serves as the structural framework and drive unit of the entire traction system, and is fixedly installed in the top space of the elevator shaft 5.

[0043] The elevator car 1 may be equipped with an outward-opening elevator door 51, the opening direction of which is perpendicular to the length direction of the I-shaped main beam of the motor mounting bracket 3.

[0044] In this embodiment, the motor mounting frame 3 is a double-layer three-dimensional frame structure, in the shape of an I-beam. The motor mounting frame 3 pre-integrates the important components of the traction system, including the traction motor 34 and all pulley assemblies 6 except those pre-fixed on the elevator car 1 and counterweight 2. This allows the entire traction structure to be assembled and tested in the manufacturing plant without the need for drilling holes in the elevator shaft 5 to install additional pulley assemblies 6 and the traction motor 34. This simplifies the on-site installation process, shortens the construction period, and improves installation reliability.

[0045] The elevator car 1 is suspended below the motor mounting frame 3 by multiple parallel steel belts 7, while the two counterweights 2 are located in the gap space between the elevator car 1 and the shaft 5 wall, symmetrically distributed on both sides of the elevator car 1, and are simultaneously connected to the traction motor 34 through different pulley assemblies 6 and the linkage of the steel belts 7.

[0046] The motor mounting bracket 3 consists of two layers, forming a stable three-dimensional support platform. The upper layer comprises two horizontally parallel pulley mounting blocks 31, which are fixedly connected by mounting block connecting strips 32 to enhance the overall structural strength and stability. The main function of the pulley mounting blocks 31 is to provide a stable mounting base for the pulley assembly. The lower layer of the motor mounting bracket 3 is a mounting bracket fixing block 33, on which a traction motor 34 is mounted. The traction motor 34 is mounted at the upper mounting portion 332 of this mounting bracket fixing block 33.

[0047] The mounting bracket fixing block 33 and the pulley mounting block 31 are fixedly connected by two vertically installed mounting bracket support columns 35 near the outer side, forming a motor mounting bracket 3 for support and fixed installation. The fixed installation of the motor mounting bracket 3 within the elevator shaft 5 achieves the positioning and fixed installation of the traction motor 34 and multiple pulley assemblies 6. The mounting bracket fixing block 33 has three rows of mounting holes at both ends for fixed installation with the steel belt retainer 4. Two rows of closely spaced mounting holes are located on the side away from the traction motor 34, at the upper mounting part 332, while the other row of mounting holes is located below the traction motor, at the lower mounting part 331 of the mounting bracket fixing block 33. The steel belt retainer 4 fixes one end of the steel belt 7. The motor mounting bracket 3 has a hollow structure, facilitating the insertion and exit of the steel belt 7 at its position within the motor mounting bracket 3.

[0048] This invention achieves a steel strip winding method with a traction ratio of 2:1 by using a double counterweight design.

[0049] First, one end of all the steel strips 7 is fixed to the mounting hole on the side of the mounting bracket fixing stop 33 away from the traction motor 34 using the steel strip retainer 4. Starting from this fixed end, all the steel strips 7 extend vertically downwards to the top of the elevator car 1, passing under the pulley assembly 6 on one side of the elevator car 1 to the bottom of the pulley assembly 6 on the other side, and then the steel strips are lifted upwards from the outside of the pulley assembly 6 on the exiting side. This achieves a traction ratio of 2:1, so that the drive load of the traction motor 34 is only half of the load mass, thus enabling it to withstand a larger load.

[0050] The steel belt 7 continues to rise. After passing through the mounting stop 33, the steel belt 7 goes around the drive shaft of the traction motor 34 from one side above the drive shaft of the traction motor 34, and then goes down from the other side of the drive shaft of the traction motor 34.

[0051] After the steel belt 7 exits the drive shaft of the traction motor 34, it continues downward until it reaches the pulley assembly 6 located below the traction motor 34, between the upper mounting portion 332 and the lower mounting portion 331. Here, the steel belt, which originally extended together, is divided into two groups. These two groups of steel belts 7 will respectively connect to and drive the two counterweights 2 located on both sides of the car; we can name them the main engine side counterweight 2 and the non-main engine side counterweight 2, respectively.

[0052] After leaving the drive shaft of the traction motor 34, a set of steel belts 7 of the counterweight 2 on the drive unit side continues vertically downward, passes through the mounting bracket fixing stop 33, and then passes under the inner pulley 62 of the pulley assembly 6 installed at the upper end of the counterweight 2 on the drive unit side. After passing over the pulley assembly 6 installed on the counterweight 2 on the drive unit side, the steel belts 7 continue vertically upward, and their final end is firmly fixed to the mounting bracket fixing stop 33 by the steel belt retainer 4.

[0053] A set of steel belts 7 used to drive the counterweight 2 on the non-host side, after leaving the drive shaft of the traction motor 34, continues downward, passing under the outer pulley 61 of the pulley assembly 6 installed between the upper mounting part 332 and the lower mounting part 331. Continuing upward, it reaches the positions of the pulley assemblies 6 installed at both ends of the pulley mounting block 31. It first passes over the pulley assembly 6 on the pulley mounting block 31 directly above the traction motor 34, then passes downward over the pulley assembly 6 at the other end of the pulley mounting block 31, passes through the steel belt through-hole 333 provided on the mounting bracket fixing block 33, and then passes downward over the pulley assembly 6 fixedly installed on the counterweight 2 on the non-host side. Finally, its end is fixed to the mounting bracket fixing block 33 by a steel belt retainer 4.

[0054] by Figure 1 Based on the perspective of the traction motor 34, when the drive shaft of the traction motor 34 rotates clockwise, the steel belt 7 rotates clockwise simultaneously. Therefore, the steel belts 7 connected to the counterweight 2 are all extended, while the steel belts 7 connected to the elevator car 1 are all shortened, thereby realizing the descent of the counterweight 2 and the ascent of the elevator car 1.

[0055] When the drive shaft of the traction motor 34 rotates counterclockwise, the steel belt 7 rotates counterclockwise synchronously. As a result, the steel belts 7 connected to the counterweight 2 are shortened, while the steel belts 7 connected to the elevator car 1 are lengthened, thereby realizing the raising of the counterweight 2 and the lowering of the elevator car 1.

[0056] Through the aforementioned layout and the winding method of the steel belt 7 between the elevator car 1, the counterweight 2, and the motor mounting bracket 3, this invention achieves true dual-sided synchronous balanced drive. Unlike conventional double counterweight elevators where only one side of the counterweight is connected to the main unit, in this design, both counterweights 2 are directly connected to the same traction motor 34 via steel belts, forming a closed transmission circuit. This ensures that the power output of the traction motor is evenly distributed to the two counterweight systems, so that the force, speed, and position of the two counterweights 2 remain highly consistent and synchronized during operation. This avoids major safety hazards such as insufficient traction force and energy loss due to single-sided drive, or serious car tilting and shaking caused by uneven friction or single-sided jamming.

[0057] This invention improves installation efficiency and quality through structural design. The traction motor, all pulleys, and fixing devices, among other complex components, are integrated into a single motor mounting frame 3. On-site construction is simplified to hoisting and securing the entire traction assembly to the top of the shaft, followed by connecting and tensioning the steel belt. This simplifies the installation process, significantly reduces on-site work time, minimizes the risks of working at heights, and ensures the high precision and reliability of the entire traction system.

Claims

1. A double counterweight elevator traction structure, comprising an elevator car (1) and an elevator shaft (5), characterized in that, The elevator car (1) and elevator shaft (5) are cylindrical structures. A motor mounting bracket (3) is fixedly installed at the top of the elevator shaft (5). The motor mounting bracket (3) is a double-layer structure. An even number of parallel steel strips (7) are wound between the elevator car (1) and the motor mounting bracket (3). At the gap between the elevator car (1) and the elevator shaft (5), counterweights (2) are provided directly below the two sides of the motor mounting bracket (3) and are hung on the steel strips (7) by pulleys. A traction motor (34) is installed on the motor mounting bracket (3).

2. The double counterweight elevator traction structure according to claim 1, characterized in that, One end of all the steel strips (7) is fixedly installed on one side of the mounting bracket fixing block (33) of the motor mounting bracket (3) by steel strip fastener (4). The steel strips (7) pass under the pulley assembly (6) symmetrically installed on the elevator car (1), pass over the output shaft of the traction motor (34) from above, and then go downward.

3. The double counterweight elevator traction structure according to claim 2, characterized in that, Between the lower mounting part (331) and the upper mounting part (332) of the mounting bracket fixing block (33), a pulley assembly (6) is installed on the side near the mounting position of the traction motor (34), and half of the steel belt (7) that passes around the output shaft of the traction motor (34) passes around the lower part of the pulley assembly (6).

4. The double counterweight elevator traction structure according to claim 3, characterized in that, The upper part of the motor mounting bracket (3) is symmetrically equipped with pulley assembly (6). The steel belt (7) passes over the pulley assembly (6) above and passes downward through the steel belt through hole (333) provided on the mounting bracket fixing block (33). After being installed with the counterweight (2), the other end of the steel belt (7) is fixedly connected to the mounting bracket fixing block (33).

5. A double counterweight elevator traction structure according to claim 2, 3, or 4, characterized in that, The steel belt (7), which passes half of the output shaft of the traction motor (34), passes downward through the mounting bracket fixing block (33) and connects to the counterweight (2). The other end is fixedly connected to the mounting bracket fixing block (33) through the steel belt fixing device (4).

6. A double counterweight elevator traction structure according to claim 1, 2, 3, or 4, characterized in that, The motor mounting bracket (3) is divided into upper and lower layers. The upper layer of the motor mounting bracket (3) is a pulley mounting block (31), and the lower layer of the motor mounting bracket (3) is a mounting bracket fixing block (33). A mounting bracket support column (35) is provided between the pulley mounting block (31) and the mounting bracket fixing block (33).

7. A double counterweight elevator traction structure according to claim 6, characterized in that, The motor mounting bracket (3) is provided with two pulley mounting blocks (31), which are connected by mounting block connecting strips (32). Between the pulley mounting blocks (31), pulley assemblies (6) consisting of pulleys of the same number as the steel belt (7) are installed on both sides of the pulley mounting blocks (31).

8. A double counterweight elevator traction structure according to claim 6, characterized in that, The traction motor (34) is located between the pulley mounting block (31) and the mounting bracket fixing block (33), and is installed on the upper surface of the mounting bracket fixing block (33). The traction motor (34) is located on the outside of the mounting bracket support column (35).

9. A double counterweight elevator traction structure according to claim 1, 2, 3, 4, 7, or 8, characterized in that, The sum of the masses of the counterweights (2) on both sides is equal to the mass of the elevator car (1), and the heights of the counterweights (2) on both sides are equal.

10. A double counterweight elevator traction structure according to claim 1, 2, 3, 4, 7, or 8, characterized in that, The elevator car (1) is provided with an outward-opening elevator door (51), and the opening direction of the elevator door (51) is perpendicular to the installation direction of the motor mounting bracket (3).

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