A feeding device for tobacco leaf elevator
By designing a feeding device for a tobacco leaf elevator, and utilizing a wire rope and pulley system as well as an electric push rod locking mechanism, the problems of tobacco leaf damage and safety risks during the tobacco leaf lifting process were solved, achieving stable and efficient tobacco leaf lifting and ensuring safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUNNAN CHINAS MASCH MFG CO LTD
- Filing Date
- 2025-08-27
- Publication Date
- 2026-07-24
Smart Images

Figure CN224539465U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flue-cured tobacco technology, specifically a feeding device for a tobacco leaf elevator. Background Technology
[0002] Currently, the main methods of loading tobacco in various flue-cured tobacco areas in my country are traditional tobacco sticks, new-style tobacco clips, loose leaf stacking, and box-type stacking. The popularization and promotion of new-style tobacco clips and loose leaf stacking have led to an increasing usage rate year by year.
[0003] The new tobacco clamp loading process mainly involves: tobacco picking, tobacco weaving, stacking, tobacco loading and transfer, and tobacco loading. This process requires high physical fitness from workers, and accidents such as falls and fractures frequently occur when loading the top layer of tobacco, seriously affecting the personal safety of tobacco farmers. Furthermore, manual handling can easily lead to friction and compression of tobacco leaves, especially when multiple layers of tobacco leaves are stacked on the drying racks, where the lower layers are easily damaged. The simple lifting device lacks a safety locking mechanism, and the platform can easily fall if the wire rope breaks or the transmission fails. The risk of the device being fully loaded is extremely high. Therefore, this application proposes a feeding device for a tobacco leaf elevator. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a feeding device for a tobacco leaf elevator, which solves the problems of manual handling leading to friction and compression of tobacco leaves, especially when multiple layers of roasting racks are stacked, where the lower layer of tobacco leaves is easily damaged by pressure, the lack of a safety locking mechanism in simple lifting devices, and the risk of platform fall due to broken wire ropes or transmission failure, resulting in extremely high risks when fully loaded.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a feeding device for a tobacco leaf elevator, comprising a frame body, a transmission mechanism and an upper wheel seat installed above the frame body, and a transmission shaft being driven to the output end of the transmission mechanism;
[0006] A lifting platform is provided below the upper wheel seat, and multiple lower wheel seats are installed on the lifting platform. Fixed pulleys are installed in the upper wheel seats, and movable pulleys are installed in the lower wheel seats.
[0007] A wire rope is connected to the wire rope drum of the drive shaft. The wire rope passes in sequence around the fixed pulley of the upper wheel seat and the movable pulley of the lower wheel seat, and is connected to the lifting platform.
[0008] The lifting platform includes a central smoke-bearing beam assembly and two sets of side smoke-bearing beam assemblies. The central smoke-bearing beam assembly includes multiple intermediate smoke-bearing beams, and adjacent intermediate smoke-bearing beams are connected by connecting chains. The side lifting assembly includes multiple side smoke-bearing beams, and adjacent side smoke-bearing beams are connected by connecting chains.
[0009] Preferably, the outer peripheral wall of the drive shaft is provided with three sets of wire rope pressure plates, through which the wire rope passes for guiding the wire rope and stabilizing the transmission.
[0010] Preferably, a plurality of the lower wheel seats are installed on the topmost intermediate smoke-carrying beam and the topmost side smoke-carrying beam, and the lower wheel seats are distributed on both sides and in the middle of the intermediate smoke-carrying beam and the side smoke-carrying beam.
[0011] Preferably, an electric push rod is provided in the lower wheel seat located on the intermediate smoke-carrying beam, and the electric push rod is used to lock the movable pulley on the lower wheel seat.
[0012] Preferably, the lower end of the frame body is provided with multiple columns, and a stop ring is installed on the column. The stop ring is located at the bottom side smoke beam and the middle smoke beam, and is used for emergency stop when the lifting platform exceeds its travel range.
[0013] Preferably, an emergency stop switch is provided on the column, and the emergency stop switch is connected to the control system of the transmission mechanism to automatically shut down the transmission mechanism when the smoke-carrying beam reaches the set position.
[0014] Preferably, a wire rope lock is installed below the upper wheel seat, and the wire rope passes through the wire rope lock and is connected to the movable pulley of the lower wheel seat to fix the wire rope.
[0015] Its beneficial effects are as follows:
[0016] 1. The feeding device of this tobacco leaf elevator uses a steel wire rope to sequentially pass around the fixed pulley of the upper wheel seat and the movable pulley of the lower wheel seat, so that the steel wire rope is connected to the middle and side tobacco beams at the top and both sides of the center position. This ensures the stable lifting of the middle and side tobacco beams, and lifts the tobacco leaves quickly and smoothly, which greatly improves the lifting efficiency, meets the needs of large-scale tobacco curing, and ensures the smooth operation of the lifting mechanism. It also effectively reduces damage to the tobacco leaves and guarantees the quality of the tobacco leaves.
[0017] 2. This tobacco leaf elevator uses a feeding device. Starting the motor body drives the drive shaft to rotate, causing the three wire rope drums on the drive shaft to rotate. The wire rope drums wind up the wire ropes, pulling the first layer of the side and middle tobacco beams upwards to the desired height. Smoke is then discharged onto the tobacco beams via tobacco clips or tobacco rods. Once the first layer is full, the transmission mechanism is activated, continuing to pull the first layer of the side and middle tobacco beams upwards. At this time, the side and middle tobacco beams are connected by a chain below, pulling... The second layer of the side and middle tobacco beams moves upward and stops at the desired height. This process is repeated until all layers are filled. Then, the side and middle tobacco beams are raised to the specified height and stopped. The machine is locked by an electric push rod to ensure stability during processing. This reduces the labor intensity of tobacco farmers, lowers the breakage rate of tobacco leaves, and improves the grade of tobacco leaves. It also facilitates the discharge of tobacco to the multi-layer tobacco beams via tobacco clips or tobacco carrying rods, greatly improving lifting efficiency, meeting the needs of large-scale tobacco curing, and effectively preventing the lower layers of tobacco leaves from being crushed. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a front view of the overall structure of this utility model;
[0020] Figure 2 This is a top view of the overall structure of this utility model;
[0021] Figure 3 This is a left view of the overall structure of this utility model;
[0022] Figure 4 This utility model Figure 1 Enlarged view of the electric linear actuator;
[0023] Figure 5 This is a schematic diagram of the transmission mechanism structure of this utility model;
[0024] Figure 6 This is a cross-sectional view of the transmission structure of this utility model;
[0025] Figure 7 This is a schematic diagram showing the connection between the motor and the reducer of this utility model.
[0026] In the diagram: 1. Main frame; 2. Transmission mechanism; 21. Main motor; 22. Reducer; 23. Mounting bracket; 24. Bearing seat; 25. Drive shaft; 26. Wire rope pressure plate; 3. Upper wheel seat; 4. Lower wheel seat; 5. Electric push rod; 6. Side smoke-carrying beam; 7. Middle smoke-carrying beam; 8. Wire rope lock; 9. Stop ring. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0028] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0029] This utility model discloses a feeding device for a tobacco leaf elevator, according to the attached... Figures 1 to 4 As shown, it includes a frame body 1, a transmission mechanism 2 and an upper wheel seat 3 are mounted on the top of the frame body 1, and the output end of the transmission mechanism 2 is connected to a transmission shaft 25, which is connected to the frame body 1.
[0030] A lifting platform is provided below the upper wheel seat 3. Lower wheel seats 4 are installed at the center and on both sides of the lifting platform. Fixed pulleys are installed in the upper wheel seat 3, and movable pulleys are installed in the lower wheel seat 4.
[0031] A wire rope is connected to the wire rope drum of the drive shaft 25. The wire rope passes in sequence around the fixed pulley of the upper wheel seat 3 and the movable pulley of the lower wheel seat 4, and is connected to the lifting platform.
[0032] Three wire rope drums are installed on the drive shaft 25. One end of the wire rope is fixedly connected to the drum, and the other end passes through the fixed pulley on the upper wheel seat 3. After the wire rope is turned, it is connected to the movable pulley on the lower wheel seat 4, which is distributed on the lifting platform.
[0033] The lifting platform consists of a central smoke-carrying beam assembly and two sets of side smoke-carrying beam assemblies. The central smoke-carrying beam assembly and the two sets of side smoke-carrying beam assemblies work together to place smoke clips or smoke-carrying rods, and exhaust smoke onto the smoke-carrying beams through the smoke clips or smoke-carrying rods.
[0034] The central smoke-bearing beam assembly includes multiple intermediate smoke-bearing beams 7, and adjacent intermediate smoke-bearing beams 7 are connected by connecting chains. The side lifting assembly includes multiple side smoke-bearing beams 6, and adjacent side smoke-bearing beams 6 are connected by connecting chains.
[0035] Multiple lower wheel seats 4 are installed on the top middle smoke-carrying beam 7 and the top side smoke-carrying beam 6. The lower wheel seats 4 are distributed on both sides and in the middle of the middle smoke-carrying beam 7 and the side smoke-carrying beam 6.
[0036] By passing the fixed pulley of the upper wheel seat 3 and the movable pulley of the lower wheel seat 4 in sequence, the steel wire rope is connected to the center position on both sides of the top middle tobacco-carrying beam 7 and the side tobacco-carrying beam 6, ensuring the stable lifting of the middle tobacco-carrying beam 7 and the side tobacco-carrying beam 6, effectively reducing damage to the tobacco leaves and ensuring the quality of the tobacco leaves.
[0037] Start the motor body 21, which drives the transmission shaft 25 to rotate, causing the three wire rope drums on the transmission shaft 25 to rotate;
[0038] The wire rope is wound up by the wire rope drum. At this time, the wire rope is pulled by the fixed pulley and the movable pulley on the upper wheel seat 3 and the lower wheel seat 4 to pull the first layer of the side smoke beam 6 and the middle smoke beam 7 upward and stop at the ideal height. The smoke is discharged to the smoke beam through the smoke clip or the smoke rod.
[0039] After the first layer is filled, the transmission mechanism 2 is activated to continue pulling the first layer of the side tobacco beams 6 and the middle tobacco beams 7 upward. At this time, the second layer of the side tobacco beams 6 and the middle tobacco beams 7 is pulled upward through the connecting chain below, stopping at the ideal height. The above work is repeated until each layer is filled. Then, the side tobacco beams 6 and the middle tobacco beams 7 are raised to the specified height and the machine is stopped. The electric push rod 5 is used to lock the machine, ensuring stability during processing. This reduces the labor intensity of tobacco farmers, reduces the damage rate of tobacco leaves, and improves the grade of tobacco leaves. It also facilitates the discharge of tobacco to the multi-layer tobacco beams through tobacco clips or tobacco carrying rods, greatly improving the lifting efficiency, meeting the needs of large-scale tobacco curing, and effectively avoiding the problem of the lower layer of tobacco leaves being crushed.
[0040] A wire rope lock 8 is installed below the upper wheel seat 3. The wire rope passes through the wire rope lock 8 and is connected to the movable pulley on the lower wheel seat 4. The wire rope lock 8 is used to fix the wire rope.
[0041] Furthermore, an electric push rod 5 is installed in the lower wheel seat 4 located on the middle smoke-bearing beam 7. The electric push rod 5 is used to lock the movable pulley on the lower wheel seat 4.
[0042] After the tobacco is loaded with fresh tobacco but before it is cured, an electric push rod is installed on the lower wheel seat 4 to prevent the transmission chain from breaking and to ensure safety during the tobacco curing process.
[0043] The lower end of the frame body 1 is provided with multiple columns, which are used to support the feeding device of the tobacco leaf elevator. Several stop rings 9 are installed on the columns, and the stop rings 9 are located at the bottom side tobacco beam 6 and the middle tobacco beam 7.
[0044] The stop ring 9 effectively supports the bottom intermediate smoke-bearing beam 7 and the side smoke-bearing beam 6, and effectively prevents emergency stopping when the lifting platform overtravels.
[0045] The main frame 1 has multiple columns to support the lifting platform for the tobacco leaves.
[0046] An emergency stop switch is installed on the column. The emergency stop switch is connected to the control system of the transmission mechanism 2 and is used to automatically shut off the transmission mechanism 2 when the smoke-carrying beam reaches the set position, so as to ensure that the smoke-carrying beam reaches the set position.
[0047] According to the appendix Figures 5 to 7 As shown, the transmission mechanism 2 includes a motor body 21, a reducer 22 and a mounting bracket 23. The output end of the motor body 21 is connected to the reducer 22. The motor body 21 and the reducer 22 are mounted on the mounting bracket 23. The mounting bracket 23 is mounted on the upper part of the frame body 1. The output end of the reducer 22 is connected to the transmission shaft 25.
[0048] Start the motor body 21, which works with the reducer 22 to transmit power. Under the action of the transmission mechanism 2, the transmission shaft 25 is driven to rotate through the transmission chain or reduction gear mechanism, so that the three wire rope drums set on the transmission shaft 25 rotate.
[0049] The wire rope is connected to the lifting platform by passing it over the fixed pulley on the upper wheel seat 3 and the movable pulley on the lower wheel seat 4 in sequence.
[0050] The wire rope is wound up by the wire rope drum. At this time, the wire rope is pulled by the fixed pulley and the movable pulley, which pulls the lifting platform upward and stops it at the ideal height. The user can then use the tobacco clip or tobacco carrying rod to discharge the tobacco onto the tobacco carrying beam, thus achieving the functions of easy loading, unloading and easy tobacco curing.
[0051] Nine steel wire ropes are distributed on both sides and the center of the lifting platform via upper wheel seat 3 and multiple lower wheel seats 4. Under the action of the steel wire ropes, the lifting platform can be raised and lowered smoothly in the frame body 1, which facilitates the loading and unloading of tobacco. At the same time, it enables the movement of tobacco leaves for curing, reduces labor intensity, improves the efficiency of tobacco loading, and makes it easy for tobacco farmers to load and unload tobacco.
[0052] These nine steel wire ropes are divided into three groups of three according to the pressure plate groups they are connected to.
[0053] Three fixed pulleys are installed in the upper wheel seat 3, and the three fixed pulleys are distributed on both sides and the center of the lifting platform;
[0054] The lower wheel seat 4 is equipped with three sets of movable pulleys. The three sets of movable pulleys are distributed on both sides and the center of the lifting platform. Each set of movable pulleys includes three movable pulleys, which are distributed at the front end, middle end and rear end of the smoke-carrying beam.
[0055] The three steel wire ropes in each group first pass together around the corresponding fixed pulley on the upper wheel seat 3.
[0056] Subsequently, the three steel wire ropes that extend from each set of fixed pulleys are then routed downwards to the three movable pulleys installed on the lower wheel seat 4. Finally, all nine steel wire ropes are connected to the lifting platform.
[0057] The function of the wire rope pressure plate 26 is to fix the end of the wire rope and provide a guiding starting point. The fixed pulley of the upper wheel seat and the movable pulley of the lower wheel seat together form a pulley block system, which is used to change the force transmission direction of the wire rope, share the load, and ensure that the wire rope runs smoothly and has uniform tension during transmission.
[0058] Bearing seats 24 are provided on both sides of the drive shaft 25, and the bearing seats 24 are installed on the upper part of the frame body 1.
[0059] The bearing housing 24 is used to ensure the stability of the drive shaft 25 during rotation.
[0060] The outer peripheral wall of the drive shaft 25 is provided with three sets of wire rope pressure plates 26. The three sets of wire rope pressure plates 26 correspond to the three sets of fixed pulleys on the upper wheel seat 3. Each set of wire rope pressure plates 26 includes three wire rope pressure plates 26, and a wire rope passes through each wire rope pressure plate 26. The nine wire ropes are distributed in groups of three, and the three wire ropes pass around the corresponding fixed pulleys on the upper wheel seat 3.
[0061] The three steel wires on each set of fixed pulleys then pass over the corresponding three lower pulley seats 4 to the movable pulleys, so that the nine steel wire ropes are connected to the lifting platform. The steel wire rope pressure plate 26, fixed pulleys and movable pulleys work together to guide the steel wire ropes and stabilize the transmission.
[0062] Three sets of wire rope pressure plates 26 are evenly installed on the outer circumference of the drive shaft 25, and their positions correspond one-to-one with the three sets of fixed pulleys on the upper wheel seat 3. Each set of wire rope pressure plates contains three independent pressure plate units. A total of nine wire ropes are involved, and each wire rope passes through one pressure plate unit and is fixed thereon.
[0063] The wire rope passes through the corresponding wire rope pressure plate 26, which is used for wire rope guidance and transmission stability.
[0064] The wire rope pressure plate 26 guides the wire rope to ensure its stability during transmission.
[0065] To ensure that the steel wire ropes supporting the tobacco-carrying beam do not break after it is filled with fresh tobacco, a safety system Sn>5 is designed. Even if the steel wire rope breaks, the tobacco-carrying beam is supported by two sliding stop rings 9 on a single column.
[0066] The column is equipped with a limit switch assembly, which includes an upper limit switch and a lower limit switch.
[0067] The upper limit switch is installed at the highest point of the smoke-carrying beam's upward stroke. When the smoke-carrying beam rises and triggers the switch, the upper limit switch sends a signal to stop the lifting action and prevent the smoke-carrying beam from continuing to move upward.
[0068] The lower limit switch is set at the lowest point of the tobacco-carrying beam's descent stroke. When the tobacco-carrying beam descends and triggers the switch, the lower limit switch sends a signal to stop the descent, preventing the tobacco-carrying beam from continuing to move downwards.
[0069] The coordinated action of the upper and lower limit switches effectively limits the travel range of the smoke-carrying beam, ensuring the safe operation of the equipment.
[0070] According to the requirements of flue-cured tobacco processing, the equipment can operate stably for a long time under the following conditions: ambient temperature of 0℃~45℃, internal component temperature of 0℃~90℃, and relative humidity of 45%~95%.
[0071] The motor body 21 and reducer 22 of the transmission mechanism 2 are selected to be suitable for storage temperatures above 100℃, relative humidity of 45% to 95%, and protection level of IP54 or above.
[0072] The limit switch controlling the upward movement of the motor is an imported product that can operate normally under conditions of above 85℃ and 95% relative humidity.
[0073] For the case where chain drive is used between reducer 22 and drive shaft 25, a safety locking mechanism is designed. Electric push rod 5 can work normally under conditions of above 85℃ and relative humidity of 95%.
[0074] All structural components are coated with heat- and humidity-resistant primers and finishes;
[0075] Chemical plating is used for moving machined parts.
[0076] The performance parameters of the tobacco leaf elevator include: a total lifting height of 3600mm, a lifting height of 800-900mm per layer, a rated lifting load of 6000kg, a maximum lifting load of 9000kg, and an input power of 3kW and a voltage of 380V for the motor body 21.
[0077] Working principle: Start the motor body 21, which works with the reducer 22 for transmission. Under the action of the transmission mechanism 2, the transmission shaft 25 is driven to rotate through the transmission chain or reduction gear mechanism, so that the three wire rope drums set on the transmission shaft 25 rotate.
[0078] By passing the wire rope over the fixed pulley on the upper wheel seat 3 and the movable pulley on the lower wheel seat 4 in sequence, the wire rope is connected to the two side smoke beams 6 and the middle smoke beam 7.
[0079] The wire rope is wound up by the wire rope drum. At this time, the wire rope is pulled by the fixed pulley and the movable pulley, which pulls the first layer of the side smoke-carrying beam 6 and the middle smoke-carrying beam 7 upward and stops at the ideal height. The user can then use the smoke clip or the smoke-carrying rod to vent smoke onto the smoke-carrying beam.
[0080] After the first layer is filled, start the transmission mechanism 2 to continue pulling the first layer of the side smoke beam 6 and the middle smoke beam 7 upward. At this time, the second layer of the side smoke beam 6 and the middle smoke beam 7 is pulled upward through the connecting chain below, and stopped at the ideal height. Repeat the above work until each layer is filled. Then raise the side smoke beam 6 and the middle smoke beam 7 to the specified height and stop the machine, and lock it by the electric push rod 5.
[0081] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0082] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A feeding device for a tobacco leaf elevator, characterized in that, Includes a frame body (1), a transmission mechanism (2) and an upper wheel seat (3) are installed on the top of the frame body (1), and the output end of the transmission mechanism (2) is connected to a transmission shaft (25). A lifting platform is provided below the upper wheel seat (3), and multiple lower wheel seats (4) are installed on the lifting platform. A fixed pulley is installed in the upper wheel seat (3), and a movable pulley is installed in the lower wheel seat (4). A wire rope is connected to the wire rope drum of the drive shaft (25). The wire rope passes in sequence around the fixed pulley of the upper wheel seat (3) and the movable pulley of the lower wheel seat (4) and is connected to the lifting platform. The lifting platform includes a central smoke-bearing beam assembly and two sets of side smoke-bearing beam assemblies. The central smoke-bearing beam assembly includes multiple intermediate smoke-bearing beams (7), and adjacent intermediate smoke-bearing beams (7) are connected by connecting chains. The side lifting assembly includes multiple side smoke-bearing beams (6), and adjacent side smoke-bearing beams (6) are connected by connecting chains.
2. The feeding device for a tobacco leaf elevator according to claim 1, characterized in that, The outer peripheral wall of the drive shaft (25) is provided with three sets of wire rope pressure plates (26), through which the wire rope passes for guiding the wire rope and stabilizing the transmission.
3. The feeding device for a tobacco leaf elevator according to claim 1, characterized in that, Multiple lower wheel seats (4) are installed on the top middle smoke-carrying beam (7) and the top side smoke-carrying beam (6), with the lower wheel seats (4) distributed on both sides and in the middle of the middle smoke-carrying beam (7) and the side smoke-carrying beam (6).
4. The feeding device for a tobacco leaf elevator according to claim 1, characterized in that, An electric push rod (5) is provided in the lower wheel seat (4) located on the intermediate smoke-carrying beam (7). The electric push rod (5) is used to lock the movable pulley on the lower wheel seat (4).
5. The feeding device for a tobacco leaf elevator according to claim 1, characterized in that, The lower end of the frame body (1) is provided with multiple columns, and a stop ring (9) is installed on the column. The stop ring (9) is located at the bottom side smoke beam (6) and the middle smoke beam (7) and is used for emergency stop when the lifting platform exceeds its travel range.
6. The feeding device for a tobacco leaf elevator according to claim 5, characterized in that, An emergency stop switch is provided on the column. The emergency stop switch is connected to the control system of the transmission mechanism (2) and is used to automatically shut down the transmission mechanism (2) when the smoke-carrying beam reaches the set position.
7. The feeding device for a tobacco leaf elevator according to claim 1, characterized in that, A wire rope lock (8) is installed below the upper wheel seat (3). The wire rope passes through the wire rope lock (8) and is connected to the movable pulley of the lower wheel seat (4) to fix the wire rope.