Spring damping device for elevator buffer

Abstract

The invention relates to the technical field of elevator buffers, in particular to a spring damping device for an elevator buffer, which comprises a vertically arranged damping shock absorber, the top of the damping shock absorber is connected with a movable plate, a main buffer spring is connected between the movable plate and the damping shock absorber, and the movable plate is movably connected with a driving plate. The lower portion of the driving plate is connected with a movable pin assembly extruding towards one side of the movable plate, the lower surface of the movable pin assembly is connected with an impact transmission assembly, and the lower portion of the damping shock absorber is connected with a standby buffering unit. A main buffer spring and a standby buffer unit are arranged, under the normal condition, the main buffer spring absorbs impact energy, and the elevator falling speed is reduced; when the main buffer spring is broken, the movable pin assembly drives the impact transmission assembly to be connected with the standby buffer unit in a clamped mode, the standby buffer unit is started to work, a lift car or a counterweight is prevented from directly impacting the bottom of a hoistway, and double guarantees are provided for safety of passengers and equipment.

Description

Technical Field

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

[0002] In an elevator safety system, as an important safety protection device, a buffer is mainly used to absorb impact energy when the elevator is overspeed or out of control, preventing the car or counterweight from directly hitting the bottom of the hoistway, thereby ensuring the safety of passengers and equipment. Currently, elevator buffers generally adopt spring damping devices, which achieve the absorption and release of energy through the elastic deformation of springs; However, most of the existing spring buffers adopt a single spring structure, and there are certain safety hazards in actual use. When the elevator makes an emergency brake or falls rapidly at an overspeed, the buffer needs to bear a huge impact load. If the spring breaks due to fatigue, material defects or long-term use, the buffer function will fail, which may further lead to serious safety accidents. Therefore, a spring damping device for an elevator buffer is proposed to improve the safety and reliability of elevator operation and reduce the occurrence probability of elevator safety accidents. Summary of the Invention

[0003] Aiming at the problems in the prior art, the present invention provides a spring damping device for an elevator buffer, which improves the safety and reliability of elevator operation and reduces the occurrence probability of elevator safety accidents.

[0004] The technical solution adopted by the present invention to solve its technical problems is a spring damping device for an elevator buffer, including a vertically arranged damping shock absorber. The top of the damping shock absorber is connected to a movable plate, and a main buffer spring is connected between the movable plate and the damping shock absorber. A driving plate is movably connected to the movable plate. The lower part of the driving plate is connected to a movable pin assembly that squeezes towards the movable plate side. The lower surface of the movable pin assembly is connected to an impact transmission assembly. The lower part of the damping shock absorber is connected to a standby buffer unit. After the impact transmission assembly moves towards the movable plate, the impact transmission assembly is engaged with the standby buffer unit.

[0005] Specifically, the movable plate is located in a slot opened on the lower surface of the driving plate. Horizontally arranged chutes that are circumferentially distributed in the slot and communicate with the slot. The movable pin assembly includes a wedge-shaped extrusion block with a downward slope that is slidably connected in the chute. A return spring is fixedly connected between the end of the extrusion block far away from the slot and the inner wall of the chute. A moving slot communicating with the chute is provided on the lower surface of the driving plate. The impact transmission assembly includes a movable rod connected to the lower surface of the wedge-shaped extrusion block. Several groups of teeth engaged with the standby buffer unit are connected to the side of the movable rod close to the damping shock absorber.

[0006] Specifically, a limiting plate is fixedly connected to the lower surface of the movable plate, a guiding and limiting sleeve corresponding to the limiting plate is arranged on the lower surface of the driving plate, the limiting plate is slidably connected with the guiding and limiting sleeve, and one end of the main buffer spring far away from the damping shock absorber passes through the guiding and limiting sleeve and is fixedly connected to the lower surface of the limiting plate.

[0007] Specifically, the spare buffer unit includes a fixed ring fixedly installed on the outer side of the lower part of the damping shock absorber, and a spare buffer spring and a sliding ring are fixedly connected in sequence on the upper part of the fixed ring.

[0008] Specifically, mounting grooves are circumferentially distributed on the edge of the upper surface of the sliding ring, and pawls are hinged in the mounting grooves; a positioning component is arranged on the outer side of the damping shock absorber.

[0009] Specifically, the positioning component includes a positioning ring arranged on the outer side of the damping shock absorber, the positioning ring is fixedly connected to the outer side of the damping shock absorber through a connecting piece, a plurality of groups of positioning grooves corresponding to the movable rod are arranged on the inner side of the positioning ring, and the lower end of the movable rod passes through the positioning groove and is connected with a limiting block.

[0010] Specifically, a buffer pad is detachably connected to the upper surface of the driving plate.

[0011] Specifically, the damping shock absorber includes a buffer oil cylinder barrel, and a piston plate that is hermetically and slidably connected to the inner wall of the buffer oil cylinder barrel. A vertically arranged piston rod is fixedly connected to the upper surface of the piston plate. The upper end of the piston rod passes through the buffer oil cylinder barrel and is slidably connected to the buffer oil cylinder barrel. A one-way liquid inlet valve and a damping hole are arranged on the piston plate. An extrusion spring is fixedly connected between the piston plate and the inner wall of the buffer oil cylinder barrel. The lower part of the buffer oil cylinder barrel 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 limiting plate.

[0012] Specifically, the lower end of the buffer oil cylinder barrel is detachably connected with a base mounting plate, and bolt assembly holes are arranged on the base mounting plate, and assembly bolts are threadedly connected in the bolt assembly holes.

[0013] Advantages of the present invention: (1) For the spring damping device for an elevator buffer of the present invention, a main buffer spring and a spare buffer unit are provided. 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 be clamped with the spare buffer unit, starting the spare buffer unit to work, avoiding the car or the counterweight directly hitting the bottom of the hoistway, and providing double protection for the safety of passengers and equipment.

[0014] (2)A spring damping device for an elevator buffer according to the present invention is provided with a ratchet on the sliding ring of the standby buffer unit, which cooperates with the teeth on the movable rod. After the standby buffer spring works, it ensures that the standby buffer spring can return to the best initial state every time it buffers, making thorough preparations for the next possible impact on the elevator. Through such a design, even if the main spring fails, the standby buffer spring can still function efficiently and can quickly return to a state where it can work again after reset, greatly improving the reliability and safety of the elevator buffer system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the drawings and embodiments.

[0016] Figure 1 Is an axonometric view of the present invention; Figure 2 Is a schematic cross-sectional view of the buffer oil cylinder of the present invention; Figure 3 Is a schematic partial cross-sectional view of the drive plate of the present invention; Figure 4 Is Figure 2 An enlarged view of area A of ; Figure 5 Is Figure 3 An enlarged view of area B of ; Figure 6 Is another axonometric view of the present invention; Figure 7 Is Figure 6 An enlarged view of area C of ; Figure 8 Is Figure 6 An enlarged view of area D of ; In the figure: 1. Damping shock absorber; 2. Movable plate; 3. Main buffer spring; 4. Drive plate; 5. Groove; 6. Slide groove; 7. Wedge-shaped extrusion block; 8. Return spring; 9. Moving groove; 10. Movable rod; 11. Teeth; 12. Limiting plate; 13. Guide and limit sleeve; 14. Fixed ring; 15. Spare buffer spring; 16. Sliding ring; 17. Installation groove; 18. Ratchet; 19. Positioning ring; 20. Connecting piece; 21. Positioning groove; 22. Limiting 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 OF THE EMBODIMENTS

[0017] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0018] In order to improve the safety and reliability of elevator operation and reduce the probability of elevator safety 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 comprises a vertically arranged damping damper 1, the top of the damping damper 1 is connected to a movable plate 2, a main buffer spring 3 is connected between the movable plate 2 and the damping damper 1, the movable plate 2 is movably connected to a driving plate 4, the lower part of the driving plate 4 is connected to a movable pin assembly 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 damper 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 clamped with the spare buffer unit.

[0019] 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. In this process, the main buffer spring 3 plays a buffering role by virtue of its own elastic deformation, absorbs the impact energy, and thus effectively slows 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. When the elevator encounters an accident that 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 to one 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 connected with the spare buffer unit, thereby starting the spare buffer unit. The spare buffer unit can absorb the impact energy generated by the elevator falling, further slow down the descending speed of the car or counterweight, and effectively prevent 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.

[0020] In order to facilitate the opening of 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 inner circumference of the slot 5 is distributed with a slide groove 6 horizontally arranged and connected to the slot 5, the movable pin assembly includes a wedge-shaped extrusion block 7 slidably connected in the slide groove 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 groove 6; the lower surface of the driving plate 4 is provided with a movable groove 9 connected to the slide groove 6, and 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 a plurality of groups of latching teeth 11 that are engaged with the spare buffer unit.

[0021] When the main buffer spring 3 is broken due to fatigue loss, 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. 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 latching teeth 11 arranged 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 direct impact of the car or counterweight on the bottom of the shaft; through the above technical scheme, 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, which greatly reduces the probability of safety accidents caused by the failure of the main buffer spring 3, and effectively guarantees the life safety of people in the elevator and the normal operation of the equipment.

[0022] 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 slidably 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.

[0023] During use, the impact force of the car is transmitted to the driving plate 4, and the driving plate 4 moves downward accordingly. When the driving plate 4 moves downward, it will exert pressure on 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 compressed. 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 hoistway. 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 buffering role during 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 support force. In this case, the return spring 8 releases elastic potential energy, pushing the wedge-shaped extrusion block 7 to slide in the chute 6. The movement of the wedge-shaped extrusion block 7 causes the movable plate 2 to move further downward. The cooperation of the limit plate 12 and the guide limit sleeve 13 is relied on to prevent the movable plate 2 from completely separating from the driving plate 4, and it also facilitates the driving plate 4 to be reset to the initial height when the subsequent damping shock absorber 1 is reset.

[0024] Exemplarily, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 shown, the present invention further includes that 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. The upper part of the fixed ring 14 is fixedly connected with a spare buffer spring 15 and a sliding ring 16 in sequence.

[0025] During use, when an accident occurs to the elevator and the main buffer spring 3 fails, the movable pin assembly drives the impact transmission assembly to act. The engaging teeth 11 of the impact transmission assembly are engaged with the spare buffer unit. At this time, the spare buffer unit starts to play a role. Due to the impact force generated by the falling of the car or counterweight, it 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 of the car or counterweight, and then slowing down the falling speed of the car or counterweight. During the whole process, the fixed ring 14 plays a role of stable support, ensuring the relative stability of the positions of the spare buffer spring 15 and the sliding ring 16, enabling the spare buffer unit to work normally, preventing it from directly hitting the bottom of the hoistway, providing an additional guarantee for the safe operation of the elevator, and reducing the risk of safety accidents.

[0026] To facilitate the operation of the spare buffer spring 15, exemplarily, such as Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6, Figure 7 As shown, the present invention further includes that the upper surface edge of the sliding ring 16 is provided with mounting grooves 17 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.

[0027] 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 reset spring 8 in the movable pin assembly quickly releases the stored elastic potential energy, driving the wedge-shaped extrusion block 7 with the inclined surface downward 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 preset moving groove 9 on the lower surface of the driving plate 4, and the latching teeth 11 on the movable rod 10 gradually approach the sliding ring 16 of the spare buffer unit, When the movable rod 10 moves to a specific position, the latching teeth 11 on the movable rod 10 and the pawls 18 hinged in the circumferentially distributed mounting grooves 17 on the upper surface edge of the sliding ring 16 are engaged. The huge impact force generated by the falling of the car or the counterweight is transmitted to the latching teeth 11 through the movable rod 10, and the latching teeth 11 and the pawls 18 are firmly engaged, thereby driving the sliding ring 16 to move downward. In 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 to avoid deviation or shaking, thereby maintaining the stability of the system. When the sliding ring 16 moves downward, the spare buffer spring 15 starts to work. As the sliding ring 16 continues to move downward, the spare buffer spring 15 is gradually compressed. In this dynamic process, the spare buffer spring 15, by virtue of its own elastic characteristics, continuously and efficiently absorbs the impact energy generated by the falling of the car or the counterweight, effectively slowing down the descending speed of the car or the counterweight, thereby preventing the car or the counterweight from directly hitting the bottom of the shaft, and building a solid and reliable guarantee for the safe operation of the elevator. Even under extreme conditions where the main buffer spring 3 fails, it can still ensure that the elevator maintains the necessary safety performance, and maximizes the protection of passenger life safety and equipment integrity; 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 latching tooth 11 on the movable rod 10 to move upward, and the latching 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 latching 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 latching tooth 11 again.

[0028] In order to prevent the backup buffer unit from being put into use when the main buffer spring 3 is normal, for example, Figure 6 , Figure 7 , Figure 8As 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 piece 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.

[0029] 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, avoiding the standby buffer unit from being put into use when the main buffer spring 3 is normal.

[0030] For example, Figure 1 As shown, the present invention also includes that a buffer pad 23 is detachably connected to the upper surface of the driving plate 4 .

[0031] 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 reduce the impact force transmitted to the drive plate 4, and then protect the drive plate 4 and the entire device from excessive impact damage.

[0032] 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 sealingly and slidably connected to the inner wall of the buffer oil cylinder 24, the upper surface of the piston plate 25 is fixedly connected with 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.

[0033] During use, when the elevator is in operation, once the car encounters a free fall, the impact force will quickly be transmitted through the drive plate 4 to the movable plate 2. 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 synchronously within the buffer cylinder 24. During this process, the piston plate 25 not only compresses the return spring 8 to store energy, but also the hydraulic oil below the piston plate 25 is squeezed, prompting the hydraulic oil to flow upward through the one-way inlet valve 27 and smoothly enter the space above the piston plate 25, enabling the car to quickly obtain buffering and effectively alleviating the impact force of the free fall; When the falling speed of the car gradually slows down, the main buffer spring 3 or the backup buffer spring 15 begins to take effect, driving the drive plate 4 to move upward. When the drive 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 upward synchronously. At this time, the hydraulic oil above the piston plate 25 cannot directly flow back to the lower part, but can only slowly flow back to the lower part of the oil cylinder through the damping hole 28. During the process of the hydraulic oil flowing through the damping hole 28, a damping force will be generated, effectively hindering the rapid upward movement of the piston plate 25 and making the entire reset process smoother; In addition, the return spring 8 between the piston plate 25 and the inner wall of the buffer cylinder 24 will also provide an elastic force for auxiliary reset, helping the piston plate 25 return to its initial position and making full preparations for the possible buffering requirements next time; In some extreme cases, during the process of the main buffer spring 3 moving downward under the impact, it may break after moving downward a certain distance. At this time, the backup mechanism of the device is activated, and the backup buffer spring 15 starts to work. As the falling speed of the car gradually decreases, the elevator enters the reset stage. During the reset process, the car drives the drive plate 4 to move upward relying on the elastic force of the backup buffer spring 15. The movement of the drive plate 4 drives the movable plate 2 and the movable rod 10 to move upward synchronously. During this process, when the teeth 11 on the movable rod 10 move upward, they squeeze and contact the lower surface of the pawl 18 and drive the pawl 18 to swing. With the swing of the pawl 18, the teeth 11 smoothly cross 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.

[0034] Exemplarily, as Figure 1 、 Figure 6 shown, the present invention further includes that the lower end of the buffer cylinder 24 is detachably connected with a base mounting plate 30. The base mounting plate 30 is provided with bolt assembly holes 31, and assembly bolts 32 are threadedly connected in the bolt assembly holes 31.

[0035] During use, the installation convenience of the buffer cylinder barrel 24 can be improved by relying on the base mounting plate 30, the bolt assembly holes 31 and the assembly bolts 32. During installation, it is only necessary to place the base mounting plate 30 at the corresponding predetermined position, align the assembly bolts 32 with the bolt assembly holes 31, and easily screw them with common tools to quickly complete the installation of the buffer cylinder barrel 24.

[0036] During use of the present invention, the buffer cylinder barrel 24 is installed at a predetermined position through the base mounting plate 30, the bolt assembly holes 31 and the assembly bolts 32. Place the base mounting plate 30 correspondingly, align the assembly bolts 32 with the bolt assembly holes 31, and screw the assembly bolts 32 with tools to complete the installation; When the car drops during the operation of the elevator, the impact force generated by the car will be quickly transmitted to the driving plate 4. After being affected by the impact force, the driving plate 4 will move downward along the guiding direction of the guiding and limiting 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. Relying on its own elastic deformation characteristics, it absorbs a large amount of impact energy, thereby effectively slowing down the falling speed of the elevator. At the same time, the damping shock absorber 1 starts to work. The piston plate 25 inside it slides in the buffer cylinder barrel 24, and the hydraulic oil below 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, enabling the car to quickly obtain buffering. During the buffering process, the damping shock absorber 1 continuously suppresses the vibration and rebound of the entire device to ensure the smooth progress of the buffering process, effectively avoiding the direct impact of the elevator car or counterweight on the bottom of the hoistway and ensuring the safety of the elevator operation; When the main buffer spring 3 breaks due to factors such as fatigue, material defects, and long-term use, the upward supporting force originally provided by the main buffer spring 3 disappears instantly, and the movable plate 2 loses support. At this time, the return spring 8 releases its elastic potential energy, pushing the wedge-shaped extrusion block 7 to slide in the chute 6. During the sliding process of the wedge-shaped extrusion block 7, the structure with its inclined surface downward 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 associated movable rod 10 to slide synchronously in the moving groove 9 on the lower surface of the driving plate 4; 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 standby buffer unit, the latch 11 and the pawl 18 are successfully engaged, and the huge impact force generated by the falling of the car or the 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 standby buffer spring 15 is compressed, and the standby buffer spring 15 absorbs the impact energy of the falling car or the counterweight during the compression process, further slowing down the descending speed of the car or the counterweight, and preventing it from directly hitting the bottom of the shaft, providing a second line of defense for elevator safety; When the damping shock absorber 1 is reset and drives the movable plate 2 to move upward, the movable rod 10 will also move upward. During the upward movement, the latching tooth 11 on the movable rod 10 will be pressed and contacted with the lower surface of the pawl 18, so that the pawl 18 swings around the hinge point. When the latching tooth 11 passes over the pawl 18, the pawl 18 automatically falls back to the initial position by its own gravity, so as to be engaged with the latching tooth 11 again later. When the falling speed of the car slows down, if the main buffer spring 3 has not failed, the main buffer spring 3 will drive the driving 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 driving plate 4 to move upward; 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, thereby driving 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 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 will be generated, which effectively hinders the rapid upward movement of the piston plate 25 and makes 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 to help the piston plate 25 return to the initial position, so as to be fully prepared for the next possible buffering demand.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A spring shock absorber device for an elevator buffer, characterized in that, It includes a vertically arranged damping shock absorber (1). The top of the damping shock absorber (1) is connected to a movable plate (2). A main buffer spring (3) is connected between the movable plate (2) and the damping shock absorber (1). A drive plate (4) is movably connected to the movable plate (2). The lower part of the drive plate (4) is connected to a movable pin assembly that squeezes towards 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 shock absorber (1) is connected to a standby buffer unit. After the impact transmission assembly moves towards the movable plate (2), the impact transmission assembly is clamped with the standby buffer unit.

2. The spring shock absorber device for an elevator buffer according to claim 1, characterized in that, The movable plate (2) is located in a slot (5) formed on the lower surface of the drive plate (4). Inside the slot (5), there are horizontally arranged and slot (5)-communicating chutes (6) distributed circumferentially. The movable pin assembly includes a wedge-shaped extrusion block (7) with a downward slope that is slidably connected in the chute (6). A return spring (8) is fixedly connected between the end of the extrusion block far away from the slot (5) and the inner wall of the chute (6). A moving slot (9) communicating with the chute (6) is provided on the lower surface of the drive plate (4). The impact transmission assembly includes a movable rod (10) connected to the lower surface of the wedge-shaped extrusion block (7). On the side of the movable rod (10) close to the damping shock absorber (1), several groups of teeth (11) that are clamped with the standby buffer unit are connected.

3. The spring shock absorber device for an elevator buffer according to claim 2, characterized in that, A limiting plate (12) is fixedly connected to the lower surface of the movable plate (2). A guiding and limiting sleeve (13) corresponding to the limiting plate (12) is provided on the lower surface of the drive plate (4). The limiting plate (12) is slidably connected to the guiding and limiting sleeve (13). The end of the main buffer spring (3) far away from the damping shock absorber (1) passes through the guiding and limiting sleeve (13) and is fixedly connected to the lower surface of the limiting plate (12).

4. The spring shock absorber device for an elevator buffer according to claim 3, characterized in that, The standby buffer unit includes a fixed ring (14) fixedly installed on the outer side of the lower part of the damping shock absorber (1). A standby buffer spring (15) and a sliding ring (16) are fixedly connected in sequence on the upper part of the fixed ring (14).

5. The spring shock absorber device for an elevator buffer according to claim 4, characterized in that, Installation grooves (17) are distributed circumferentially on the edge of the upper surface of the sliding ring (16). Pawls (18) are hinged in the installation grooves (17). A positioning assembly is provided on the outer side of the damping shock absorber (1).

6. The spring shock absorber device for an elevator buffer according to claim 5, characterized in that, The positioning assembly includes a positioning ring (19) arranged on the outer side of the damping shock absorber (1). The positioning ring (19) is fixedly connected to the outer side of the damping shock absorber (1) through a connecting piece (20). Several groups of positioning grooves (21) corresponding to the movable rod (10) are provided on the inner side of the positioning ring (19). The lower end of the movable rod (10) passes through the positioning groove (21) and is connected to a limiting block (22).

7. The spring shock absorber device for an elevator buffer according to claim 6, characterized in that, A buffer pad (23) is detachably connected to the upper surface of the drive plate (4).

8. The spring shock absorber device for an elevator buffer according to claim 7, characterized in that, The damping shock absorber (1) includes a buffer oil cylinder barrel (24), and a piston plate (25) that is hermetically and slidably connected to the inner wall of the buffer oil cylinder barrel (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 barrel (24) and is slidably connected to the buffer oil cylinder barrel (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 barrel (24). The lower part of the buffer oil cylinder barrel (24) is filled with hydraulic oil. The piston rod (26) is located in the middle of the main buffer spring (3). The upper end of the piston rod (26) is fixedly connected to the lower surface of the limit plate (12).

9. The spring shock absorber device for an elevator buffer according to claim 8, characterized in that, The lower end of the buffer oil cylinder barrel (24) is detachably connected with a base mounting plate (30). Bolt assembly holes (31) are provided on the base mounting plate (30), and assembly bolts (32) are threadedly connected in the bolt assembly holes (31).

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