Spring vibration reduction device for elevator buffer

Abstract

The present invention relates to the technical field of elevator buffers, and specifically to a spring vibration reduction device for an elevator buffer, comprising a vertically arranged damping damper, the top of the damping damper being connected to a movable plate, a main buffer spring being connected between the movable plate and the damping damper, a drive plate being movably connected to the movable plate, the lower part of the drive plate being connected to a movable pin assembly that is squeezed toward one side of the movable plate, the lower surface of the movable pin assembly being connected to an impact transmission assembly, and the lower part of the damping damper being connected to a spare buffer unit; a main buffer spring and a spare buffer unit are provided, and under normal circumstances the main buffer spring absorbs impact energy and slows down the falling speed of the elevator; when the main buffer spring breaks, the movable pin assembly drives the impact transmission assembly to engage with the spare buffer unit, and starts the work of the spare buffer unit, thereby preventing the car or counterweight from directly hitting the bottom of the shaft, and providing double protection for the safety of passengers and equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator buffers, and in particular to a spring vibration damping device for an elevator buffer. Background Art

[0002] In elevator safety systems, buffers are important safety protection devices. They are mainly used to absorb impact energy when the elevator is overspeeding or out of control, preventing the car or counterweight from directly hitting the bottom of the shaft, thereby ensuring the safety of passengers and equipment. Currently, elevator buffers generally use spring vibration reduction devices, which absorb and release energy through the elastic deformation of the spring.

[0003] However, most existing spring buffers adopt a single spring structure, which poses certain safety hazards during actual use. When the elevator encounters emergency braking or overspeeding and falls, the buffer needs to withstand huge impact loads. If the spring breaks due to fatigue, material defects or long-term use, it will cause the buffering function to fail, and then cause serious safety accidents. Therefore, a spring vibration reduction device for an elevator buffer is proposed to improve the safety and reliability of elevator operation and reduce the probability of elevator safety accidents. Summary of the Invention

[0004] In response to the problems in the prior art, the present invention provides a spring vibration reduction device for an elevator buffer, which improves the safety and reliability of elevator operation and reduces the probability of elevator safety accidents.

[0005] The technical solution adopted by the present invention to solve its technical problems is a spring vibration reduction device for an elevator buffer, including a vertically arranged damping vibration absorber, the top of the damping vibration absorber is connected to a movable plate, a main buffer spring is connected between the movable plate and the damping vibration absorber, the movable plate is movably connected to a driving plate, the lower part of the driving plate is connected to a movable pin assembly that is squeezed toward one side of the movable plate, the lower surface of the movable pin assembly is connected to an impact transmission assembly, the lower part of the damping vibration absorber is connected to a spare buffer unit, and after the impact transmission assembly moves toward the movable plate, the impact transmission assembly is engaged with the spare buffer unit.

[0006] Specifically, the movable plate is located in a slot opened on the lower surface of the driving plate, and a slide groove is horizontally arranged and connected to the slot distributed circumferentially in the slot. The movable pin assembly includes a wedge-shaped extrusion block slidably connected to the slide groove with an inclined surface downward, and a return spring is fixedly connected between the end of the extrusion block away from the slot and the inner wall of the slide groove; a movable groove connected to the slide groove is provided on the lower surface of the driving plate, and the impact transmission assembly includes a movable rod connected to the lower surface of the wedge-shaped extrusion block, and the side of the movable rod close to the damping shock absorber is connected to several groups of teeth engaged with the spare buffer unit.

[0007] Specifically, the lower surface of the movable plate is fixedly connected to the limit plate, the lower surface of the driving plate is provided with a guide limit sleeve corresponding to the limit plate, the limit plate and the guide limit sleeve are slidably connected, and the end of the main buffer spring away from the damping shock absorber passes through the guide limit sleeve and is fixedly connected to the lower surface of the limit plate.

[0008] Specifically, the backup buffer unit includes a fixed ring fixedly installed on the outer side of the lower part of the damping shock absorber, and the upper part of the fixed ring is fixedly connected to the backup buffer spring and the sliding ring in sequence.

[0009] Specifically, mounting grooves are distributed circumferentially on the edge of the upper surface of the sliding ring, and ratchets are hinged in the mounting grooves; and a positioning assembly is provided on the outer side of the damping shock absorber.

[0010] Specifically, the positioning assembly includes a positioning ring arranged on the outside of the damping shock absorber, which is fixedly connected to the outside of the damping shock absorber through a connecting piece. The inner side of the positioning ring is provided with several groups of positioning grooves corresponding to the movable rod, and the lower end of the movable rod passes through the positioning groove and is connected to the limit block.

[0011] Specifically, a buffer pad is detachably connected to the upper surface of the driving plate.

[0012] Specifically, the damping shock absorber includes a buffer oil cylinder and a piston plate sealed and slidably connected to the inner wall of the buffer oil cylinder. The upper surface of the piston plate is fixedly connected to a vertically arranged piston rod. The upper end of the piston rod passes through the buffer oil cylinder and is slidably connected to the buffer oil cylinder. A one-way liquid inlet valve and a damping hole are provided on the piston plate. An extrusion spring is fixedly connected between the piston plate and the inner wall of the buffer oil cylinder. The lower part of the buffer oil cylinder is filled with hydraulic oil. The piston rod is located in the middle of the main buffer spring, and the upper end of the piston rod is fixedly connected to the lower surface of the limit plate.

[0013] Specifically, the lower end of the buffer oil cylinder is detachably connected to a base mounting plate, the base mounting plate is provided with bolt assembly holes, and the bolt assembly holes are threadedly connected with assembly bolts.

[0014] Beneficial effects of the present invention:

[0015] (1) The present invention provides a spring damping device for an elevator buffer, which is provided with a main buffer spring and a spare buffer unit. Under normal circumstances, the main buffer spring absorbs impact energy and slows down the falling speed of the elevator. When the main buffer spring breaks, the movable pin assembly drives the impact transmission assembly to engage with the spare buffer unit, and starts the spare buffer unit to work, thereby preventing the car or counterweight from directly hitting the bottom of the shaft, thereby providing double protection for the safety of passengers and equipment.

[0016] (2) The present invention provides a spring vibration reduction device for an elevator buffer. A ratchet is provided on the sliding ring of the spare buffer unit, which cooperates with the latching teeth on the movable rod. After the spare buffer spring works, it is ensured that the spare buffer spring can return to the optimal initial state after each buffering, so as to make thorough preparations for the next impact that the elevator may face. Through such a design, even if the main spring fails, the spare buffer spring can still function efficiently and can quickly return to a state where it can be put into operation again after being reset, which greatly improves the reliability and safety of the elevator buffer system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and examples.

[0018] Figure 1 is an axonometric drawing of the present invention;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the buffer oil cylinder of the present invention;

[0020] Figure 3 Schematic diagram of the cross-sectional structure of the driving plate of the present invention;

[0021] Figure 4 for Figure 2 A magnified view of area A;

[0022] Figure 5 for Figure 3 A magnified view of area B;

[0023] Figure 6 It is another perspective axonometric drawing of the present invention;

[0024] Figure 7 for Figure 6 Magnified view of area C;

[0025] Figure 8 for Figure 6 Magnified view of area D;

[0026] In the figure: 1. Damping shock absorber; 2. Movable plate; 3. Main buffer spring; 4. Driving plate; 5. Slot; 6. Slide; 7. Wedge-shaped extrusion block; 8. Return spring; 9. Moving groove; 10. Movable rod; 11. Gear; 12. Limit plate; 13. Guide limit sleeve; 14. Fixed ring; 15. Spare buffer spring; 16. Sliding ring; 17. Mounting groove; 18. Pawl; 19. Positioning ring; 20. Connecting piece; 21. Positioning groove; 22. Limit block; 23. Buffer pad; 24. Buffer oil cylinder; 25. Piston plate; 26. Piston rod; 27. One-way liquid inlet valve; 28. Damping hole; 29. ​​Extrusion spring; 30. Base mounting plate; 31. Bolt assembly hole; 32. Assembly bolt. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] In order to improve the safety and reliability of elevator operation and reduce the probability of elevator accidents, as an embodiment of the present invention, Figure 1 、 Figure 3 、 Figure 5 As shown, a spring vibration reduction device for an elevator buffer of the present invention includes a vertically arranged damping vibration absorber 1, the top of the damping vibration absorber 1 is connected to a movable plate 2, a main buffer spring 3 is connected between the movable plate 2 and the damping vibration absorber 1, a driving plate 4 is movably connected to the movable plate 2, the lower part of the driving plate 4 is connected to a movable pin assembly that is squeezed toward one side of the movable plate 2, the lower surface of the movable pin assembly is connected to an impact transmission assembly, the lower part of the damping vibration absorber 1 is connected to a spare buffer unit, and after the impact transmission assembly moves toward the movable plate 2, the impact transmission assembly is engaged with the spare buffer unit.

[0029] When in use, the impact force of the car is transmitted to the driving plate 4, causing the driving plate 4 to move downward. When the driving plate 4 moves downward, it will push the connected movable plate 2 to move downward synchronously. During this process, the main buffer spring 3 plays a buffering role by virtue of its own elastic deformation, absorbing the impact energy, thereby effectively slowing down the falling speed of the elevator. At the same time, the damping shock absorber 1 suppresses the vibration and rebound of the entire device, making the buffering process more stable, thereby effectively ensuring that the elevator car or counterweight will not directly hit the bottom of the shaft, greatly reducing the probability of safety accidents.

[0030] When the elevator encounters an accident and causes the main buffer spring 3 to break, the pressure originally borne by the main buffer spring 3 is instantly unbalanced, and the main buffer spring 3 can no longer provide support for the movable plate 2. At this time, the movable plate 2 can move downward, and the movable pin assembly will move toward the side of the movable plate 2 and squeeze the movable plate 2, causing the movable plate 2 to move downward; when the movable pin assembly moves, it will drive the impact transmission assembly to move synchronously, and the impact transmission assembly will be engaged with the spare buffer unit, thereby starting the spare buffer unit to work. The spare buffer unit can absorb the impact energy generated by the elevator falling, further slowing down the descending speed of the car or counterweight, and effectively preventing the car or counterweight from directly hitting the bottom of the shaft, providing a reliable second line of defense for the safety of passengers and equipment, and effectively ensuring the life safety of people in the elevator and the normal operation of the equipment.

[0031] In order to facilitate opening the standby buffer unit, for example, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5As shown, the present invention also includes that the movable plate 2 is located in the slot 5 opened on the lower surface of the driving plate 4, and the slot 5 is circumferentially distributed with a horizontal slide 6 connected to the slot 5, the movable pin assembly includes a wedge-shaped extrusion block 7 slidably connected in the slide 6 with an inclined surface downward, and a return spring 8 is fixedly connected between the end of the extrusion block away from the slot 5 and the inner wall of the slide 6; the lower surface of the driving plate 4 is provided with a movable groove 9 connected to the slide 6, the impact transmission assembly includes a movable rod 10 connected to the lower surface of the wedge-shaped extrusion block 7, and the side of the movable rod 10 close to the damping shock absorber 1 is connected to several groups of latching teeth 11 that are engaged with the spare buffer unit.

[0032] During use, when the main buffer spring 3 breaks due to fatigue wear, material defects or long-term use, the balance of the entire buffer system is broken. Since the main buffer spring 3 can no longer provide upward elastic support for the movable plate 2, the movable plate 2 loses its supporting force. At this time, the return spring 8, which was originally in a compressed state, releases its elastic potential energy, pushing the wedge-shaped extrusion block 7 to slide in the slide groove 6. During the movement of the wedge-shaped extrusion block 7, the wedge-shaped extrusion block 7 generates an extrusion force on the movable plate 2, prompting the movable plate 2 to move downward;

[0033] At the same time, the movement of the wedge-shaped extrusion block 7 drives the movable rod 10 to move synchronously, and the movable rod 10 slides in the movable groove 9 on the lower surface of the driving plate 4. When the movable rod 10 moves to a specific position, the locking teeth 11 set on the movable rod 10 are successfully engaged with the spare buffer unit, and the spare buffer unit immediately takes effect to absorb the impact energy generated by the fall of the elevator, further slow down the descending speed of the car or counterweight, and effectively avoid the car or counterweight from directly hitting the bottom of the shaft; through the above technical solution, even in the extreme case of failure of the main buffer spring 3, the entire device can still maintain basic structural stability and effective force transmission, greatly reducing the probability of safety accidents caused by the failure of the main buffer spring 3, and effectively ensuring the life safety of people in the elevator and the normal operation of the equipment.

[0034] In order to prevent the movable plate 2 from being completely separated from the driving plate 4, for example, Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 As shown, the present invention also includes that the lower surface of the movable plate 2 is fixedly connected to the limit plate 12, the lower surface of the driving plate 4 is provided with a guide limit sleeve 13 corresponding to the limit plate 12, the limit plate 12 is slidingly connected to the guide limit sleeve 13, and the end of the main buffer spring 3 away from the damping shock absorber 1 passes through the guide limit sleeve 13 and is fixedly connected to the lower surface of the limit plate 12.

[0035] When in use, the impact force of the car is transmitted to the driving plate 4, which then moves downward. When the driving plate 4 moves downward, it applies pressure to the movable plate 2, causing the movable plate 2 to move downward synchronously. During the downward movement of the movable plate 2, the main buffer spring 3 is squeezed. The main buffer spring 3 absorbs and dissipates energy through elastic deformation, thereby effectively slowing down the falling speed of the elevator and reducing the risk of the car or counterweight directly hitting the bottom of the shaft.

[0036] When the impact force is transmitted to the driving plate 4 and causes it to move downward, the main buffer spring 3 plays a major role in the buffering process. If the main buffer spring 3 breaks during this process, the pressure balance originally borne by the main buffer spring 3 will be instantly broken. At this time, the main buffer spring 3 can no longer provide upward elastic support for the movable plate 2, and the movable plate 2 loses its supporting force.

[0037] In this case, the return spring 8 releases its elastic potential energy, pushing the wedge-shaped extrusion block 7 to slide in the slide groove 6. The movement of the wedge-shaped extrusion block 7 causes the movable plate 2 to move further downward, relying on the cooperation of the limit plate 12 and the guide limit sleeve 13 to prevent the movable plate 2 from being completely separated from the drive plate 4, and also facilitate the subsequent reset of the damping shock absorber 1 to drive the drive plate 4 to return to its initial height.

[0038] For example, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 As shown, the present invention further includes that the backup buffer unit includes a fixed ring 14 fixedly mounted on the outer side of the lower portion of the damping shock absorber 1 , and the upper portion of the fixed ring 14 is fixedly connected to a backup buffer spring 15 and a sliding ring 16 in sequence.

[0039] During use, when an accident occurs in the elevator, the main buffer spring 3 fails, the movable pin assembly drives the impact transmission assembly to move, and the locking teeth 11 of the impact transmission assembly are engaged with the spare buffer unit. At this time, the spare buffer unit begins to work, and the impact force generated by the falling car or counterweight will be transmitted to the sliding ring 16 through the impact transmission assembly. Under the action of the impact force, the sliding ring 16 will compress the spare buffer spring 15; as the sliding ring 16 moves downward, the spare buffer spring 15 is continuously compressed, absorbing the impact energy of the falling car or counterweight, thereby slowing down the descending speed of the car or counterweight. During the whole process, the fixed ring 14 plays a role of stable support, ensuring that the positions of the spare buffer spring 15 and the sliding ring 16 are relatively stable, so that the spare buffer unit can work normally and avoid it directly hitting the bottom of the shaft, providing additional protection for the safe operation of the elevator and reducing the risk of safety accidents.

[0040] In order to facilitate the driving of the spare buffer spring 15, for example, Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown, the present invention further includes: mounting grooves 17 are distributed circumferentially on the edge of the upper surface of the sliding ring 16 , and a pawl 18 is hinged in the mounting groove 17 ; a positioning assembly is provided on the outer side of the damping shock absorber 1 .

[0041] When in use, during the operation of the elevator, once the main buffer spring 3 loses its normal working ability due to fatigue, material defects, long-term use loss and other factors, at this time, the return spring 8 in the movable pin assembly quickly releases the stored elastic potential energy, driving the wedge-shaped extrusion block 7 with the downward inclined surface to slide quickly in the slide groove 6. The wedge-shaped extrusion block 7 is rigidly connected to the movable rod 10, driving the movable rod 10 to move synchronously. The movable rod 10 slides along the movable groove 9 preset on the lower surface of the driving plate 4, and the locking teeth 11 on the movable rod 10 gradually approach the sliding ring 16 of the spare buffer unit.

[0042] When the movable rod 10 moves to a specific position, the latching teeth 11 on the movable rod 10 engage with the pawls 18 hinged in the circumferentially distributed mounting grooves 17 on the upper edge of the sliding ring 16. The huge impact force generated by the falling car or counterweight is transmitted to the latching teeth 11 through the movable rod 10. The stable engagement between the latching teeth 11 and the pawls 18 drives the sliding ring 16 to move downward. During this process, the fixed ring 14 fixedly installed on the outer side of the lower part of the damping shock absorber 1 ensures that the sliding ring 16 moves downward along a predetermined vertical path, avoiding deviation or shaking, thereby maintaining the stability of the system.

[0043] When the sliding ring 16 moves downward, the backup buffer spring 15 starts to work. As the sliding ring 16 continues to move downward, the backup buffer spring 15 is gradually compressed. In this dynamic process, the backup buffer spring 15, by virtue of its own elastic characteristics, continuously and efficiently absorbs the impact energy generated by the falling car or counterweight, effectively slowing down the descent speed of the car or counterweight, thereby preventing the car or counterweight from directly hitting the bottom of the shaft, and building a solid and reliable guarantee for the safe operation of the elevator. Even in the extreme condition of failure of the main buffer spring 3, it can still ensure that the elevator maintains the necessary safety performance, maximizing the safety of passengers and the integrity of the equipment;

[0044] When the damping shock absorber 1 is reset and drives the movable plate 2 to move upward, the driving plate 4 and the movable rod 10 are driven to move upward, thereby driving the tooth 11 on the movable rod 10 to move upward, and the tooth 11 is pressed and contacted with the lower surface of the pawl 18, and drives the pawl 18 to swing. With the help of the swing of the pawl 18, the tooth 11 smoothly passes over the pawl 18, and the pawl 18 can automatically fall back by gravity, so as to facilitate the subsequent pawl 18 to engage the tooth 11 again.

[0045] In order to avoid the backup buffer unit from being put into use when the main buffer spring 3 is normal, for example, Figure 6 、 Figure 7 、 Figure 8 As shown, the present invention also includes that the positioning assembly includes a positioning ring 19 arranged on the outside of the damping shock absorber 1, the positioning ring 19 is fixedly connected to the outside of the damping shock absorber 1 through a connecting member 20, and the inner side of the positioning ring 19 is provided with a plurality of groups of positioning grooves 21 corresponding to the movable rod 10, and the lower end of the movable rod 10 passes through the positioning groove 21 and is connected to the limit block 22.

[0046] When in use, during the operation of the elevator, the movable plate 2 always maintains stable movement in the vertical direction under the constraint of the positioning groove 21, avoiding deviation, shaking, etc., ensuring the stability of the entire device structure, and making the buffering process more reliable; the movable rod 10 is limited by the limit block 22 to prevent the lower end of the movable rod 10 from being separated from the positioning ring 19 when the damping shock absorber 1 drives the movable plate 2, the driving plate 4 and the movable rod 10 to reset upward, thereby ensuring the stability of the movable plate 2 and the movable rod 10; at the same time, when the main buffer spring 3 is working normally, when the main buffer spring 3 presses the movable plate 2 upward, the limit block 22 is relied on to ensure the stability of the movable rod 10 and the driving plate 4, thereby ensuring that the extrusion force between the movable plate 2 and the driving plate 4 is sufficient to drive the compression of the movable pin assembly, thereby avoiding the standby buffer unit being put into use when the main buffer spring 3 is normal.

[0047] For example, Figure 1 As shown, the present invention further includes that a buffer pad 23 is detachably connected to the upper surface of the driving plate 4 .

[0048] During use, when the elevator falls, the buffer pad 23 can first bear the impact force of the car, absorb part of the energy through its own elastic deformation, effectively reducing the impact force transmitted to the drive plate 4, and thus protecting the drive plate 4 and the entire device from excessive impact damage.

[0049] For example, Figure 1 、 Figure 2 、 Figure 4 As shown, the present invention also includes that the damping shock absorber 1 includes a buffer oil cylinder 24, and a piston plate 25 sealed and slidably connected to the inner wall of the buffer oil cylinder 24, the upper surface of the piston plate 25 is fixedly connected to a vertically arranged piston rod 26, the upper end of the piston rod 26 passes through the buffer oil cylinder 24 and is slidably connected to the buffer oil cylinder 24, a one-way liquid inlet valve 27 and a damping hole 28 are provided on the piston plate 25, an extrusion spring 29 is fixedly connected between the piston plate 25 and the inner wall of the buffer oil cylinder 24, the lower part of the buffer oil cylinder 24 is filled with hydraulic oil, the piston rod 26 is located in the middle of the main buffer spring 3, and the upper end of the piston rod 26 is fixedly connected to the lower surface of the limit plate 12.

[0050] During use, during the operation of the elevator, once the car encounters a fall, the impact force will be quickly transmitted to the movable plate 2 via the driving plate 4, and the movable plate 2 will then drive the piston rod 26 to move downward. The downward movement of the piston rod 26 pushes the piston plate 25 to slide down synchronously in the buffer oil cylinder 24. During this process, the piston plate 25 not only squeezes the return spring 8 to store force, but also the hydraulic oil under the piston plate 25 is squeezed, causing the hydraulic oil to flow upward with the help of the one-way liquid inlet valve 27 and smoothly enter the space above the piston plate 25, so that the car can be quickly buffered and effectively alleviate the impact of the fall;

[0051] When the falling speed of the car gradually slows down, the main buffer spring 3 or the spare buffer spring 15 begins to play a role, driving the driving plate 4 to move upward. When the driving plate 4 moves upward, it drives the movable plate 2 to reset and rise. The movable plate 2 drives the piston rod 26 to move upward, and the piston plate 25 slides up synchronously. At this time, the hydraulic oil above the piston plate 25 cannot flow back to the bottom directly, and can only slowly flow back to the lower part of the cylinder through the damping hole 28. In the process of the hydraulic oil flowing through the damping hole 28, a damping force is generated, which effectively hinders the rapid upward movement of the piston plate 25, making the entire reset process smoother; in addition, the reset spring 8 between the piston plate 25 and the inner wall of the buffer oil cylinder 24 will also provide auxiliary reset elastic force, helping the piston plate 25 to return to its initial position, and making full preparations for the next possible buffering demand;

[0052] In some extreme cases, the main buffer spring 3 may break after moving down a certain distance while being impacted. At this time, the backup mechanism of the device is activated and the backup buffer spring 15 starts working. As the car falls at a gradually decreasing speed, the elevator enters the reset stage. During the reset process, the car relies on the elastic force of the backup buffer spring 15 to drive the drive plate 4 to move up. The movement of the drive plate 4 drives the movable plate 2 and the movable rod 10 to move upward synchronously. In this process, when the tooth 11 on the movable rod 10 moves up, it is squeezed and contacted with the lower surface of the pawl 18, and drives the pawl 18 to swing. With the help of the swing of the pawl 18, the tooth 11 smoothly passes over the pawl 18. During this period, the backup buffer spring 15 drives the car to rise slowly. When the car is separated from the drive plate 4, the damping shock absorber 1 drives the movable plate 2 to reset, thereby driving the drive plate 4 and the movable rod 10 to reset to the initial state.

[0053] For example, Figure 1 、 Figure 6 As shown, the present invention also includes that the lower end of the buffer oil cylinder 24 is detachably connected to a base mounting plate 30 , and the base mounting plate 30 is provided with bolt assembly holes 31 , and the bolt assembly holes 31 are threadedly connected with assembly bolts 32 .

[0054] During use, the installation convenience of the buffer oil cylinder 24 can be improved by relying on the base mounting plate 30, the bolt assembly hole 31 and the assembly bolt 32. During installation, it is only necessary to place the base mounting plate 30 in the predetermined position, align the assembly bolt 32 with the bolt assembly hole 31, and use common tools to easily screw it, and the installation of the buffer oil cylinder 24 can be quickly completed.

[0055] When the present invention is used, the buffer oil cylinder 24 is installed in a predetermined position through the base mounting plate 30, the bolt assembly hole 31 and the assembly bolt 32. The base mounting plate 30 is placed accordingly, and the assembly bolt 32 is aligned with the bolt assembly hole 31. The assembly bolt 32 is tightened with a tool to complete the installation.

[0056] When the elevator car falls during operation, the impact force generated by the car will be quickly transmitted to the drive plate 4. After being affected by the impact force, the drive plate 4 will move downward along the guide direction of the guide limit sleeve 13, and at the same time push the movable plate 2 to move downward synchronously. During the downward movement of the movable plate 2, the main buffer spring 3 will be compressed. With its own elastic deformation characteristics, it absorbs a large amount of impact energy, thereby effectively slowing down the speed of the elevator's fall. At the same time, the damping shock absorber 1 begins to work, and its internal piston plate 25 slides in the buffer oil cylinder 24. The hydraulic oil under the piston plate 25 is squeezed and flows upward through the one-way liquid inlet valve 27 into the space above the piston plate 25, so that the car can be quickly buffered. During the buffering process, the damping shock absorber 1 continuously suppresses the vibration and rebound of the entire device, ensuring a smooth buffering process, effectively preventing the elevator car or counterweight from directly hitting the bottom of the shaft, and ensuring the safety of the elevator operation.

[0057] When the main buffer spring 3 breaks due to fatigue, material defects, long-term use, etc., the upward support force originally provided by the main buffer spring 3 disappears instantly, and the movable plate 2 loses its support. At this time, the return spring 8 releases its elastic potential energy, pushing the wedge-shaped extrusion block 7 to slide in the slide groove 6. During the sliding process, the downward inclined structure of the wedge-shaped extrusion block 7 will generate an extrusion force on the movable plate 2, prompting the movable plate 2 to move further downward. At the same time, the wedge-shaped extrusion block 7 drives the movable rod 10 connected to it to slide synchronously in the movable groove 9 on the lower surface of the drive plate 4;

[0058] As the movable rod 10 moves, when the latch 11 on the movable rod 10 moves to a position corresponding to the pawl 18 on the sliding ring 16 of the backup buffer unit, the latch 11 and the pawl 18 are successfully engaged. The huge impact force generated by the falling car or counterweight is transmitted to the latch 11 through the movable rod 10, thereby driving the sliding ring 16 to move downward. During the downward movement of the sliding ring 16, the backup buffer spring 15 is compressed. During the compression process, the backup buffer spring 15 absorbs the impact energy of the falling car or counterweight, further slowing down the descent speed of the car or counterweight and preventing it from directly hitting the bottom of the shaft, providing a second line of defense for elevator safety.

[0059] When the damping shock absorber 1 is reset and the movable plate 2 moves upward, the movable rod 10 also moves upward. During the upward movement, the latching tooth 11 on the movable rod 10 is pressed into contact with the lower surface of the pawl 18, causing the pawl 18 to swing around the hinge point. When the latching tooth 11 passes over the pawl 18, the pawl 18 automatically falls back to its initial position due to its own gravity, so that it can be engaged with the latching tooth 11 again.

[0060] When the car falls slower, if the main buffer spring 3 has not failed, the main buffer spring 3 will drive the drive plate 4 to move upward by its own elastic restoring force; if the main buffer spring 3 has failed, the spare buffer spring 15 will play a role and drive the drive plate 4 to move upward;

[0061] When the driving plate 4 moves upward, it will drive the movable plate 2 to reset and rise synchronously. The rise of the movable plate 2 will cause the piston rod 26 to move upward, and then drive the piston plate 25 to slide synchronously in the buffer cylinder 24; at this time, the hydraulic oil above the piston plate 25 cannot directly flow back to the bottom due to the unidirectional conduction characteristics of the one-way liquid inlet valve 27, and can only slowly flow back to the lower part of the cylinder through the damping hole 28. In the process of the hydraulic oil flowing through the damping hole 28, a damping force is generated, which effectively hinders the rapid upward movement of the piston plate 25, making the entire reset process smoother; in addition, the extrusion spring 29 between the piston plate 25 and the inner wall of the buffer cylinder 24 will also provide an auxiliary reset elastic force, helping the piston plate 25 to return to its initial position, and be fully prepared for the next possible buffering demand.

[0062] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spring damping device for an elevator buffer, characterized in that: The invention comprises a vertically arranged damping vibration absorber (1), the top of the damping vibration absorber (1) is connected to a movable plate (2), a main buffer spring (3) is connected between the movable plate (2) and the damping vibration absorber (1), the upper movable plate (2) is connected to a driving plate (4), the lower part of the driving plate (4) is connected to a movable pin assembly that is pressed toward one side of the movable plate (2), the lower surface of the movable pin assembly is connected to an impact transmission assembly, the lower part of the damping vibration absorber (1) is connected to a spare buffer unit, and after the impact transmission assembly moves toward the movable plate (2), the impact transmission assembly is engaged with the spare buffer unit; The movable plate (2) is located in a slot (5) provided on the lower surface of the driving plate (4), and a slide groove (6) is horizontally arranged and connected to the slot (5) on the inner circumference of the slot (5). The movable pin assembly includes a wedge-shaped extrusion block (7) slidably connected to the slide groove (6) with an inclined surface facing downward, and a return spring (8) is fixedly connected between the end of the extrusion block away from the slot (5) and the inner wall of the slide groove (6); a moving groove (9) connected to the slide groove (6) is provided on the lower surface of the driving plate (4); the impact transmission assembly includes a movable rod (10) connected to the lower surface of the wedge-shaped extrusion block (7), and a side of the movable rod (10) close to the damping shock absorber (1) is connected to a plurality of groups of latching teeth (11) engaged with the spare buffer unit; the spare buffer unit includes a fixed ring (14) fixedly installed on the outer side of the lower part of the damping shock absorber (1), and the upper part of the fixed ring (14) is fixedly connected to the spare buffer spring (15) and the sliding ring (16) in sequence.

2. The spring damping device for an elevator buffer according to claim 1, characterized in that: The lower surface of the movable plate (2) is fixedly connected to the limit plate (12), the lower surface of the driving plate (4) is provided with a guide limit sleeve (13) corresponding to the limit plate (12), the limit plate (12) and the guide limit sleeve (13) are slidably connected, and one end of the main buffer spring (3) away from the damping shock absorber (1) passes through the guide limit sleeve (13) and is fixedly connected to the lower surface of the limit plate (12).

3. The spring damping device for an elevator buffer according to claim 2, characterized in that: The upper surface edge of the sliding ring (16) is provided with mounting grooves (17) distributed circumferentially, and a ratchet (18) is hinged in the mounting groove (17); and a positioning assembly is provided on the outer side of the damping shock absorber (1).

4. The spring damping device for an elevator buffer according to claim 3, characterized in that: The positioning assembly includes a positioning ring (19) arranged on the outside of the damping vibration absorber (1), the positioning ring (19) is fixedly connected to the outside of the damping vibration absorber (1) through a connecting piece (20), and a plurality of positioning grooves (21) corresponding to the movable rod (10) are provided on the inside of the positioning ring (19), and the lower end of the movable rod (10) passes through the positioning groove (21) and is connected to the limit block (22).

5. The spring damping device for an elevator buffer according to claim 4, characterized in that: A buffer pad (23) is detachably connected to the upper surface of the drive plate (4).

6. The spring vibration reduction device for an elevator buffer according to claim 5, characterized in that: The damping shock absorber (1) comprises a buffer oil cylinder (24) and a piston plate (25) sealingly and slidingly connected to the inner wall of the buffer oil cylinder (24); a vertically arranged piston rod (26) is fixedly connected to the upper surface of the piston plate (25); the upper end of the piston rod (26) passes through the buffer oil cylinder (24) and is slidably connected to the buffer oil cylinder (24); a one-way liquid inlet valve (27) and a damping hole (28) are provided on the piston plate (25); an extrusion spring (29) is fixedly connected between the piston plate (25) and the inner wall of the buffer oil cylinder (24); the lower part of the buffer oil cylinder (24) is filled with hydraulic oil; the piston rod (26) is located in the middle of the main buffer spring (3); and the upper end of the piston rod (26) is fixedly connected to the lower surface of the limit plate (12).

7. The spring damping device for an elevator buffer according to claim 6, characterized in that: The lower end of the buffer oil cylinder (24) is detachably connected to a base mounting plate (30), and the base mounting plate (30) is provided with a bolt assembly hole (31), and the bolt assembly hole (31) is threadedly connected with an assembly bolt (32).

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