Stable elevator speed limiter tensioning device
By using a servo motor-driven threaded rod system and gear meshing technology, the problems of rope slack, offset, and friction in the elevator speed governor tensioning device have been solved. This has enabled precise adjustment of the pulley position and improved stability, reduced maintenance costs, and made it adaptable to different rope diameters and dynamic tensioning requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG HUILIN TECH CO LTD
- Filing Date
- 2025-09-23
- Publication Date
- 2026-08-04
AI Technical Summary
Existing elevator speed governor tensioning devices are prone to insufficient tension control accuracy due to rope slack and deviation, resulting in high frictional resistance, significant vibration and noise, poor adjustment flexibility, and high maintenance costs. They also cannot adapt to different rope diameters and dynamic tensioning requirements.
The system employs a servo motor-driven threaded rod system, which achieves precise adjustment of the pulley position through gear meshing. Combined with deep groove ball bearings and wear-resistant coating, it reduces friction. It is equipped with a detachable structure to adapt to different rope diameters and real-time tension requirements. The servo motor is used to adjust the pulley position to ensure rope stability and limit.
It enables precise adjustment of the pulley position, reduces frictional loss, eliminates the risk of rope slippage, improves the stability and service life of the device, reduces maintenance costs, and meets the high-frequency and high-safety requirements of elevator operation.
Smart Images
Figure CN224590474U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of elevator speed governor technology, and in particular to a stable elevator speed governor tensioning device. Background Technology
[0002] In elevator operating systems, the speed governor is a core safety component, and the stability of its tensioning device directly determines the reliability of the speed limiting function. Existing tensioning devices mostly adopt a single gravity or spring adjustment structure, which is prone to slack and deviation due to long-term operation of the rope, resulting in insufficient tension control accuracy. In addition, the traditional device has high frictional resistance between the pulley and the shaft, which easily generates vibration and noise during operation. At the same time, the rope lacks a precise limiting structure, which poses a risk of slippage. Furthermore, most devices have poor adjustment flexibility and cannot adapt to different rope diameters or dynamic tension requirements. After long-term use, the components wear out quickly, resulting in high maintenance costs. They are difficult to meet the requirements of high-frequency and high-safety operation of elevators, which brings certain adverse effects to people's use. In order to overcome the shortcomings of existing technologies, we propose a stable elevator speed governor tensioning device. Utility Model Content
[0003] The main purpose of this utility model is to provide a stable elevator speed governor tensioning device, which can effectively solve the problems in the background art.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A stable elevator speed governor tensioning device includes two support frames, a base plate fixedly connected to the lower end of the support frames, a tensioning wheel installed between the two support frames, and a speed governor rope. Both ends of the tensioning wheel are fixedly connected to a first rotating shaft. A fixing plate is fixedly connected to the upper end of one of the support frames. A first servo motor is detachably connected to one side of the fixing plate, and the output shaft of the first servo motor is detachably connected to a first threaded rod. A first connecting cylinder is fixedly connected to the end of the first threaded rod away from the first servo motor, and a second threaded rod is fixedly connected to the other end of the first connecting cylinder. A first gear is fixedly connected to the other end of the second threaded rod, and a second gear meshes below the first gear. A third threaded rod is fixedly connected inside the second gear, and the third threaded rod is located away from the second gear. A second connecting cylinder is fixedly connected to one end, and a fourth threaded rod is fixedly connected to the other end of the second connecting cylinder. A rectangular groove is opened on the surface of the support frame. A first moving block is threadedly connected to the outer surface of the first threaded rod, the second threaded rod, the third threaded rod, and the fourth threaded rod. A connecting block is fixedly connected to one end of the first moving block, and an installation block is fixedly connected to the lower end of two of the connecting blocks. A connecting plate is fixedly connected to the upper end of the other two connecting blocks, and a second servo motor is detachably connected to the top of the connecting plate. A fifth threaded rod is detachably connected to the output shaft of the second servo motor. A second moving block is threadedly connected to the outer surface of the fifth threaded rod. A second rotating shaft is fixedly connected to the front end of the two installation blocks and the two second moving blocks, and pulleys are rotatably connected to the outer surface of the multiple second rotating shafts.
[0005] Preferably, the first threaded rod and the second threaded rod have opposite thread directions, the third threaded rod and the fourth threaded rod have opposite thread directions, and the pitch of the first threaded rod, the second threaded rod, the third threaded rod and the fourth threaded rod are all the same.
[0006] Preferably, both ends of the first rotating shaft are rotatably connected to the support frame via bearings. The bearings are deep groove ball bearings, and the inner ring of the bearing is interference-fitted with the first rotating shaft, while the outer ring of the bearing is transition-fitted with the mounting hole provided in the support frame.
[0007] Preferably, a deep groove ball bearing is also provided between the second rotating shaft and the pulley, and an arc-shaped groove adapted to the speed limiter rope is provided on the outer circumferential surface of the pulley, and a wear-resistant coating is provided on the inner wall of the arc-shaped groove.
[0008] Preferably, a buffer pad is fixedly connected to the lower surface of the base plate. The buffer pad is made of nitrile rubber, and multiple waist-shaped mounting holes are opened on the base plate. The waist-shaped mounting holes are evenly distributed along the length direction of the base plate.
[0009] Compared with the prior art, the present invention has the following beneficial effects: This stable elevator speed governor tensioning device uses a first servo motor to drive a first threaded rod to rotate. A first connecting cylinder synchronously drives a second threaded rod with the opposite thread direction. Simultaneously, the meshing of the first and second gears causes the third and fourth threaded rods to rotate synchronously in opposite directions. This allows four sets of first moving blocks to move synchronously in opposite directions along a rectangular groove. The device can precisely adjust the horizontal position of the pulleys to control the tension of the speed governor rope, effectively preventing rope deviation. Both the first shaft and pulleys use deep groove ball bearings, significantly reducing rotational friction. The nitrile rubber buffer pad on the lower surface of the base plate absorbs vibrations during device operation, significantly improving the device's installation stability and operational stability, fully meeting the core requirements of elevator speed governor systems for tension accuracy and operational smoothness.
[0010] This stable elevator speed governor tensioning device uses a second servo motor to drive the fifth threaded rod to rotate, which in turn moves the second moving block to flexibly adjust the vertical position of the upper pulley. This allows it to dynamically adapt to different speed governor rope diameters or real-time tensioning requirements. Combined with the arc-shaped groove on the outer circumference of the pulley, it precisely limits the rope's position, completely eliminating the risk of rope slippage. The wear-resistant coating on the inner wall of the arc-shaped groove significantly reduces frictional loss between the rope and the pulley, significantly extending their service life. Furthermore, both the first and second servo motors use a detachable connection structure, facilitating future maintenance and replacement. The overall structure balances adjustment flexibility with component durability, effectively reducing the operation and maintenance costs of the elevator speed governor system and significantly improving the long-term reliability and economy of the device. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model from another angle; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the pulley position adjustment structure of this utility model.
[0012] In the diagram: 1. Support frame; 2. Base plate; 3. Tensioning wheel; 4. Speed limiter rope; 5. First rotating shaft; 6. Fixing plate; 7. First servo motor; 8. First threaded rod; 9. First connecting cylinder; 10. Second threaded rod; 11. First gear; 12. Second gear; 13. Third threaded rod; 14. Second connecting cylinder; 15. Fourth threaded rod; 16. Rectangular groove; 17. First moving block; 18. Connecting block; 19. Mounting block; 20. Connecting plate; 21. Second servo motor; 22. Fifth threaded rod; 23. Second moving block; 24. Second rotating shaft; 25. Pulley. Detailed Implementation
[0013] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0014] Example 1, as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a stable elevator speed governor tensioning device includes two support frames 1. A base plate 2 is fixedly connected to the lower end of each support frame 1. A nitrile rubber buffer pad is fixedly connected to the lower surface of the base plate 2, and multiple waist-shaped mounting holes are evenly distributed along its length on the base plate 2. A first rotating shaft 5 is fixedly connected to both ends of a tensioning wheel 3. The two ends of the first rotating shaft 5 are rotatably connected to the support frame 1 via deep groove ball bearings. The inner ring of the deep groove ball bearing is interference-fitted with the first rotating shaft 5, and the outer ring is transition-fitted with the mounting holes on the support frame 1. A fixing plate 6 is fixedly connected to the upper end of one of the support frames 1. A first servo motor 7 is detachably connected to one side of the fixed plate 6. A first threaded rod 8 is detachably connected to the output shaft of the first servo motor 7. A first connecting cylinder 9 is fixedly connected to the end of the first threaded rod 8 away from the first servo motor 7. A second threaded rod 10 is fixedly connected to the other end of the first connecting cylinder 9, with the threads of the first threaded rod 8 and the second threaded rod 10 having opposite directions. A first gear 11 is fixedly connected to the other end of the second threaded rod 10. A second gear 12 meshes with the lower part of the first gear 11. A third threaded rod 13 is fixedly connected inside the second gear 12. The third threaded rod 13 is located away from the second gear 12. A second connecting cylinder 14 is fixedly connected to one end of the first threaded rod 8, and a fourth threaded rod 15 is fixedly connected to the other end of the second connecting cylinder 14. The threads of the third threaded rod 13 and the fourth threaded rod 15 have opposite directions. The pitches of the first threaded rod 8, the second threaded rod 10, the third threaded rod 13, and the fourth threaded rod 15 are all the same. A rectangular groove 16 is opened on the surface of the support frame 1. The outer surfaces of the first threaded rod 8, the second threaded rod 10, the third threaded rod 13, and the fourth threaded rod 15 are all threadedly connected to a first moving block 17. A connecting block 18 is fixedly connected to one end of the first moving block 17, and the lower ends of the two connecting blocks 18 are fixedly connected to... Mounting block 19, and the upper ends of the other two connecting blocks 18 are fixedly connected to connecting plates 20. The top of the connecting plates 20 is detachably connected to a second servo motor 21. The output shaft of the second servo motor 21 is detachably connected to a fifth threaded rod 22. The outer surface of the fifth threaded rod 22 is threadedly connected to a second moving block 23. The front ends of the two mounting blocks 19 and the two second moving blocks 23 are fixedly connected to a second rotating shaft 24. The outer surface of the second rotating shaft 24 is rotatably connected to a pulley 25 through a deep groove ball bearing. The outer circumference of the pulley 25 is provided with an arc-shaped groove adapted to the speed limiter rope 4, and the inner wall of the arc-shaped groove is provided with a wear-resistant coating.
[0015] It should be noted that this utility model is a stable elevator speed governor tensioning device. In use, the device is first positioned and installed at a designated location using the waist-shaped mounting holes on the base plate 2. The nitrile rubber buffer pad on the lower surface of the base plate 2 absorbs vibrations generated during operation, ensuring overall stability. When it is necessary to adjust the tension of the speed governor rope 4 or to limit and guide it, the first servo motor 7 is activated. The output shaft of the first servo motor 7 drives the first threaded rod 8 to rotate, which in turn drives the second threaded rod 10 to rotate synchronously through the first connecting cylinder 9. Because the threads of the first threaded rod 8 and the second threaded rod 10 have opposite directions, the first moving blocks 17 on their outer surfaces move towards or in opposite directions along the rectangular groove 16 of the support frame 1. Simultaneously, the second threaded rod 10 drives the first gear 11 to rotate, which in turn meshes with and drives the second gear 12 to rotate. The second gear 12 drives the third threaded rod 13 to rotate, which in turn drives the second connecting cylinder 14 to rotate synchronously. When the fourth threaded rod 15 rotates, the first moving block 17 on the outer surface of the third threaded rod 13 and the fourth threaded rod 15 rotate in opposite directions. The first moving block 17 on the outer surface of the third threaded rod 13 also moves in opposite directions along the rectangular groove 16. This causes the mounting block 19 and the connecting plate 20 to move synchronously through the connecting block 18. This allows for the adjustment of the horizontal position of the pulley 25 on the lower mounting block 19 and the pulley 25 on the upper connecting plate 20. If the vertical position of the upper pulley 25 needs to be adjusted, the second servo motor 21 on the connecting plate 20 is started. The output shaft of the second servo motor 21 drives the fifth threaded rod 22 to rotate, causing the second moving block 23 on the outer surface of the fifth threaded rod 22 to drive the second rotating shaft 24 at the front end and the pulley 25 to move vertically. Finally, the arc-shaped grooves on the outer circumference of each pulley 25 provide stable limiting and guidance for the speed limiter rope 4. The wear-resistant coating on the inner wall of the arc-shaped grooves reduces the wear between the speed limiter rope 4 and the pulley 25, ensuring the long-term stable operation of the device.
[0016] 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 stable elevator speed governor tensioning device, comprising two support frames (1), a base plate (2) fixedly connected to the lower end of the support frames (1), a tensioning wheel (3) installed between the two support frames (1), and a speed governor rope (4), characterized in that: The tensioning wheel (3) is fixedly connected to a first rotating shaft (5) at both ends. A fixed plate (6) is fixedly connected to the upper end of one of the support frames (1). A first servo motor (7) is detachably connected to one side of the fixed plate (6), and the output shaft of the first servo motor (7) is detachably connected to a first threaded rod (8). A first connecting cylinder (9) is fixedly connected to the end of the first threaded rod (8) away from the first servo motor (7), and a second threaded rod (10) is fixedly connected to the other end of the first connecting cylinder (9). A first gear (11) is fixedly connected to the other end of the second threaded rod (10). A second gear (12) meshes with the first gear (11), and a third threaded rod (13) is fixedly connected inside the second gear (12). A second connecting cylinder (14) is fixedly connected to the end of the third threaded rod (13) away from the second gear (12), and a fourth threaded rod (15) is fixedly connected to the other end of the second connecting cylinder (14). The support frame (1) has a rectangular groove (16) on its surface. The outer surfaces of the first threaded rod (8), the second threaded rod (10), the third threaded rod (13) and the fourth threaded rod (15) are all threaded with a first moving block (17). One end of the first moving block (17) is fixedly connected to a connecting block (18), and the lower ends of two of the connecting blocks (18) are fixedly connected to mounting blocks (19). The upper ends of the other two connecting blocks (18) are fixedly connected to connecting plates (20), and the top of the connecting plate (20) is detachably connected to a second servo motor (21). The output shaft of the second servo motor (21) is detachably connected to a fifth threaded rod (22). The outer surface of the fifth threaded rod (22) is threaded with a second moving block (23). The front ends of the two mounting blocks (19) and the two second moving blocks (23) are all fixedly connected to a second rotating shaft (24), and the outer surfaces of the multiple second rotating shafts (24) are rotatably connected to pulleys (25).
2. The stable elevator speed governor tensioning device according to claim 1, characterized in that: The first threaded rod (8) and the second threaded rod (10) have opposite thread directions, and the third threaded rod (13) and the fourth threaded rod (15) have opposite thread directions. The pitch of the first threaded rod (8), the second threaded rod (10), the third threaded rod (13), and the fourth threaded rod (15) are all the same.
3. The stable elevator speed governor tensioning device according to claim 1, characterized in that: Both ends of the first rotating shaft (5) are rotatably connected to the support frame (1) through bearings. The bearings are deep groove ball bearings, and the inner ring of the bearings is interference-fitted with the first rotating shaft (5), while the outer ring of the bearings is transition-fitted with the mounting holes opened in the support frame (1).
4. The stable elevator speed governor tensioning device according to claim 1, characterized in that: The second rotating shaft (24) is also provided with a deep groove ball bearing between it and the pulley (25), and the outer circumferential surface of the pulley (25) is provided with an arc-shaped groove that is compatible with the speed limiter rope (4), and the inner wall of the arc-shaped groove is provided with a wear-resistant coating.
5. The stable elevator speed governor tensioning device according to claim 1, characterized in that: A buffer pad is fixedly connected to the lower surface of the base plate (2). The buffer pad is made of nitrile rubber, and multiple waist-shaped mounting holes are opened on the base plate (2). The waist-shaped mounting holes are evenly distributed along the length direction of the base plate (2).