Elevator compensation rope tensioning device
By maintaining the tension of the compensating rope through the tensioner frame and the weight of the tensioner itself, combined with the design of the buffer component and the arc-shaped buffer surface, the problem of elevator compensating rope swaying and tangling is solved, thus achieving smooth elevator operation and equipment protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2026-04-07
AI Technical Summary
Existing elevator compensating rope tensioning devices are prone to problems such as shaking and tangling due to inconsistent tension and building vibration during use, which affect the elevator's operational stability and noise. Furthermore, untimely adjustment of the counterweight may lead to unstable car operation.
The tensioning rope is kept taut by the tensioning wheel frame and the tensioning wheel itself. Combined with the design of the buffer component and the arc-shaped buffer surface, the movement range of the tensioning wheel is limited by the guide frame and longitudinal guide rail, and the impact energy is absorbed by the compression spring, thus avoiding the use of counterweights.
It effectively reduces vibration and swaying during high-speed elevator operation, enhances the stability of the compensating rope, ensures smooth elevator operation, reduces wear and noise of the device, and improves overall reliability and durability.
Smart Images
Figure CN224091421U_ABST
Abstract
Description
Technical Field
[0001] This application relates to an elevator compensating rope tensioning device, belonging to the field of elevator technology. Background Technology
[0002] Elevator compensating rope tensioning devices are primarily used to ensure that the compensating rope maintains constant tension during elevator operation. This balances the weight difference between the car and the counterweight and reduces vibration and entanglement issues during high-speed operation. In actual elevator use, factors such as inconsistent tension and building self-vibration often cause the compensating rope to sway and entangle, ultimately leading to elevator vibration and noise problems. Existing elevator compensating rope tensioning devices mainly use counterweights to achieve rope tension. However, this can negatively impact elevator performance. For example, if changes in counterweight weight are not adjusted promptly, it can cause unstable car operation, resulting in shaking or abnormal noises, making it difficult to meet the demands of modern elevators for high-speed operation, heavy loads, and maintenance. Utility Model Content
[0003] According to one aspect of this application, an elevator compensating rope tensioning device is provided, which does not require the addition of counterweights and uses the weight of the tensioning wheel frame and the tensioning wheel itself as the tensioning force to maintain the tension of the compensating rope.
[0004] An elevator compensating rope tensioning device, characterized in that it comprises:
[0005] The tensioning device is connected to the end of the compensating rope facing the bottom of the elevator car;
[0006] The tensioning device includes a guide frame and a tensioning wheel. Longitudinal guide rails are provided on both sides of the guide frame. The tensioning wheel is mounted on the longitudinal guide rails via a tensioning wheel bracket to allow the tensioning wheel to move on the longitudinal guide rails and to limit the range of motion of the tensioning wheel. The compensating rope is suspended on the tensioning wheel.
[0007] A buffer assembly is provided at the top of the guide frame. The buffer assembly includes a buffer rod and a compression spring. The buffer rod passes through the guide frame, and the compression spring is sleeved on the buffer rod and located below the top of the guide frame. The buffer rod and the top of the tension wheel frame are provided with a buffer stroke. The buffer surface of the buffer rod near the tension wheel frame is an arc-shaped buffer surface.
[0008] Furthermore, a base assembly is provided at the bottom of the guide frame, and the base assembly is installed at the bottom of the elevator shaft.
[0009] Furthermore, a pair of limit switch brackets are provided on the longitudinal guide rail, and corresponding travel switches are provided on the limit switch brackets. The travel switches are used to limit the range of movement of the tensioning wheel on the longitudinal guide rail.
[0010] Furthermore, the bottom of the buffer rod is provided with an abutment plate, one end of the compression spring is connected to the abutment plate, and the other end of the compression spring is connected to the bottom of the guide frame;
[0011] The abutment plate is an arc-shaped abutment plate, which is used to convert the lateral force into an axial force when the buffer assembly collides with the tensioning wheel frame.
[0012] Furthermore, the arc-shaped abutment plate has an arc-shaped buffer surface on the side near the tensioning wheel frame.
[0013] The beneficial effects that this application can produce include:
[0014] This application provides an elevator compensating rope tensioning device that uses the weight of the tensioning wheel frame and the tensioning wheel itself as the tensioning force to maintain the tension of the compensating rope, eliminating the need for additional counterweights. This effectively addresses issues such as vibration, swaying, and entanglement that occur during high-speed elevator operation, while simultaneously limiting the range of motion of the tensioning wheel to ensure effective tension. Furthermore, a buffer component is incorporated, and the buffer surface is designed in an arc shape, increasing the contact area between the buffer surface and the tensioning wheel frame, making the buffering process smoother and reducing damage to the tensioning wheel frame and guide frame from impact forces. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of an elevator compensating rope tensioning device according to one embodiment of this application;
[0016] List of components and reference numerals: 1-Guide frame; 2-Tensioner wheel; 3-Longitudinal guide rail; 4-Tensioner wheel bracket; 5-Buffer rod; 6-Compression spring; 7-Base assembly; 8-Limit switch bracket; 9-Limit switch; 10-Abutment plate. Detailed Implementation
[0017] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.
[0018] See Figure 1 An elevator compensating rope tensioning device, characterized in that it comprises:
[0019] The tensioning device is connected to the end of the compensating rope facing the bottom of the elevator car;
[0020] One end of the compensating rope is connected to the counterweight side, and the other end of the compensating rope is connected to the bottom of the elevator car via a tensioning device.
[0021] The tensioning device includes a guide frame 1 and a tensioning wheel 2. Both sides of the guide frame 1 are provided with longitudinal guide rails 3. The tensioning wheel 2 is mounted on the longitudinal guide rails 3 through a tensioning wheel frame 4, which is used to make the tensioning wheel 2 move on the longitudinal guide rails 3 and limit the range of movement of the tensioning wheel 2. The compensating rope is suspended on the tensioning wheel 2.
[0022] A buffer assembly is provided at the top of the guide frame 1. The buffer assembly includes a buffer rod 5 and a compression spring 6. The buffer rod 5 passes through the guide frame 1, and the compression spring 6 is sleeved on the buffer rod 5 and located below the top of the guide frame 1. The buffer rod 5 and the top of the tension wheel frame 4 are provided with a buffer stroke. The buffer surface of the buffer rod 5 near the tension wheel frame 4 is an arc-shaped buffer surface.
[0023] Specifically, the compensating rope connects the counterweight side and the bottom of the elevator car, while the tensioning device maintains the tension of the compensating rope, ensuring the smoothness and safety of elevator operation. One end of the compensating rope is connected to the counterweight side, and the other end, after passing through the tensioning device, is connected to the bottom of the elevator car. This allows the compensating rope to automatically adjust its length according to changes in the relative positions of the car and counterweight during elevator operation, compensating for length differences caused by factors such as wire rope elongation, thus ensuring the balance of elevator operation. Longitudinal guide rails are installed on both sides of the guide frame, and the tensioning wheel is mounted on these longitudinal guide rails via a tensioning wheel bracket. The longitudinal guide rails provide a track for the tensioning wheel, allowing it to move longitudinally while limiting its range of motion to prevent excessive movement that could affect the normal operation of the elevator. The compensating rope is suspended from the tensioning wheel, and the movement of the tensioning wheel on the longitudinal guide rails adjusts the tension of the compensating rope. When the compensating rope becomes slack, the tensioning wheel moves downward to tighten the rope; when the compensating rope is subjected to excessive tension, the tensioning wheel moves upward to provide a buffering effect and prevent damage to the rope due to overstretching. Therefore, this application uses the weight of the tensioning wheel frame and the tensioning wheel itself as the tensioning force to maintain the tension of the compensating rope, eliminating the need for additional counterweights and effectively addressing issues such as vibration, swaying, and entanglement that occur during high-speed elevator operation.
[0024] Furthermore, a buffer assembly, including a buffer rod and a compression spring, is installed at the top of the guide frame. The buffer rod passes through the guide frame, and the compression spring is sleeved on the buffer rod and located below the top of the guide frame. During elevator operation, emergency situations may occur, such as emergency braking, which will generate a large impact force. Under the action of the impact force, the tensioner frame will move upward and compress the buffer rod. The compression spring on the buffer rod, under compression, absorbs the impact energy through elastic deformation, playing a buffering role and reducing the impact force on the tensioning device and the entire elevator system, thus protecting the safety of the elevator equipment. At the same time, the buffer surface of the buffer rod near the tensioner frame is designed as an arc, increasing the contact area with the tensioner frame, making the buffering process smoother and further improving the buffering effect. The buffer rod and the top of the tensioner frame have a buffer stroke, providing a certain space for the movement of the buffer rod. The arc-shaped buffer surface of the buffer rod near the tensioner frame increases the contact area between the buffer surface and the tensioner frame, making the buffering process smoother and reducing the damage of the impact force to the tensioner frame and the guide frame.
[0025] The bottom of the guide frame 1 is provided with a base assembly 7, which is installed at the bottom of the elevator shaft.
[0026] A pair of limit switch brackets 8 are provided on the longitudinal guide rail 3, and a limit switch 9 is correspondingly provided on the limit switch bracket 8. The limit switch 9 is used to limit the range of motion of the tensioning wheel 2 on the longitudinal guide rail 3.
[0027] Specifically, the guide frame 1 is the basic support structure of the entire tensioner device, providing a guiding channel for the movement of the tensioner 2. The base assembly 7 is installed at the bottom of the elevator shaft, providing stable support for the guide frame 1 and bearing the weight of the entire tensioner device as well as various forces generated during operation. The longitudinal guide rail 3 is fixed to the guide frame 1, allowing the tensioner 2 to move up and down on the longitudinal guide rail 3, adjusting its position to adapt to changes in the tension of the compensating rope under different working conditions. A pair of limit switch brackets 8 are installed on the longitudinal guide rail 3, and their positions can be adjusted according to actual needs. Limit switches 9 are correspondingly installed on the limit switch brackets 8, used to detect the movement position of the tensioner 2 and limit its range of movement on the longitudinal guide rail 3.
[0028] It is worth noting that when the elevator is running, the tension of the compensating rope changes. The tensioner 2 moves up and down on the longitudinal guide rail 3 to adjust the tension of the compensating rope. When the tensioner 2 moves to the set upper or lower limit position, it will touch the corresponding limit switch 9. After the limit switch 9 is triggered, it sends a signal to the elevator control system. Upon receiving the signal, the control system will take corresponding measures, such as stopping the movement of the tensioner 2 or adjusting the elevator's operating parameters, thereby preventing the tensioner 2 from exceeding the allowable range of movement and ensuring the safe operation of the elevator.
[0029] The bottom of the buffer rod 5 is provided with an abutment plate 10, one end of the compression spring 6 is connected to the abutment plate 10, and the other end of the compression spring is connected to the bottom of the guide frame;
[0030] The abutment plate 10 is an arc-shaped abutment plate, which is used to convert the lateral force into an axial force when the buffer assembly collides with the tensioning wheel frame 4.
[0031] Specifically, an abutment plate is installed at the bottom of the buffer top rod, with one end of the compression spring connected to the abutment plate and the other end connected to the bottom of the guide frame. This allows the force of the compression spring to be transmitted more directly and evenly to the buffer top rod, enhancing the overall structural stability of the buffer assembly. Simultaneously, the abutment plate is designed as an arc-shaped abutment plate. When the buffer assembly collides with the tensioning wheel frame, the special shape of the arc-shaped abutment plate plays a crucial role. During the collision between the tensioning wheel frame and the buffer assembly, the direction of the force is often not solely axial, but includes a certain lateral component. The arc-shaped abutment plate can utilize its curved surface structure to gradually convert the lateral force into an axial force. Specifically, when the lateral force acts on the arc-shaped abutment plate, the curved surface generates a reaction force, which has a certain axial component, thus guiding the main force transmission direction towards the axial direction and reducing the adverse effects of the lateral force on the device structure.
[0032] It is worth noting that by setting the abutment plate and optimizing its shape to be arc-shaped, the impact of lateral forces on the tensioning wheel frame and buffer assembly during collisions can be effectively reduced, decreasing the sway of the tensioning wheel frame and improving the stability of the entire tensioning device. A stable device structure helps ensure that the compensating rope is always at a reasonable tension, ensuring the smooth operation of the elevator. At the same time, a stable structure also reduces fatigue damage caused by vibration and impact, further improving the reliability and durability of the device. The arc-shaped abutment plate design makes force transmission more rational, transforming the originally complex lateral forces into axial forces, allowing the compression spring to more effectively perform its buffering function and improving the performance of the buffer assembly.
[0033] The arc-shaped abutment plate has an arc-shaped buffer surface on the side near the tensioning wheel frame 4.
[0034] Furthermore, the curved buffer surface decomposes the lateral impact force into axial compressive force through surface deformation, and the contact point gradually transitions from line contact to surface contact, reducing the pressure per unit area and avoiding local stress concentration. When the buffer assembly comes into contact with the tensioning wheel frame due to mechanical vibration or accidental collision, the curved buffer surface converts the lateral force into the axial compressive force of the spring through curved surface sliding, preventing the tensioning wheel frame from shifting laterally.
[0035] The above description is merely a few embodiments of this application and is not intended to limit this application in any way. Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of this application using the disclosed technical content are equivalent to equivalent implementation cases and fall within the scope of the technical solution.
Claims
1. An elevator compensating rope tensioning device, characterized in that, include: The tensioning device is connected to the end of the compensating rope facing the bottom of the elevator car; The tensioning device includes a guide frame (1) and a tensioning wheel (2). The guide frame (1) is provided with longitudinal guide rails (3) on both sides. The tensioning wheel (2) is mounted on the longitudinal guide rails (3) through a tensioning wheel frame (4) to allow the tensioning wheel (2) to move on the longitudinal guide rails (3) and to limit the range of motion of the tensioning wheel (2). The compensating rope is suspended on the tensioning wheel (2). The guide frame (1) is provided with a buffer assembly at the top. The buffer assembly includes a buffer top rod (5) and a compression spring (6). The buffer top rod (5) passes through the guide frame (1). The compression spring (6) is sleeved on the buffer top rod (5) and located below the top of the guide frame (1). The buffer top rod (5) and the top of the tension wheel frame (4) are provided with a buffer stroke. The buffer surface of the buffer top rod (5) near the tension wheel frame (4) is an arc-shaped buffer surface.
2. The elevator compensating rope tensioning device according to claim 1, characterized in that, The guide frame (1) is provided with a base assembly (7) at its bottom, and the base assembly (7) is installed at the bottom of the elevator shaft.
3. The elevator compensating rope tensioning device according to claim 1, characterized in that, A pair of limit switch brackets (8) are provided on the longitudinal guide rail (3), and a limit switch (9) is provided on the limit switch bracket (8) respectively. The limit switch (9) is used to limit the range of movement of the tensioning wheel (2) on the longitudinal guide rail (3).
4. The elevator compensating rope tensioning device according to claim 1, characterized in that, The bottom of the buffer top rod (5) is provided with an abutment plate (10), one end of the compression spring (6) is connected to the abutment plate (10), and the other end of the compression spring is connected to the bottom of the guide frame; The abutment plate (10) is an arc-shaped abutment plate, which is used to convert the lateral force into an axial force when the buffer assembly collides with the tension wheel frame (4).
5. The elevator compensating rope tensioning device according to claim 4, characterized in that, The arc-shaped abutment plate has an arc-shaped buffer surface on the side near the tensioning wheel frame (4).