Elevator car damping and buffering device

Abstract

The invention provides an elevator car damping and buffering device which comprises a buffering and damping assembly, and the buffering and damping assembly comprises a buffering plate, a sliding seat, eight pushing rods, a supporting seat, a second damper and a second supporting spring. And the four first dampers and the four first supporting springs are symmetrically mounted on the upper surface of the buffer plate. Through cooperation of a first supporting spring and a first damper, first-time buffering and damping of the elevator car can be achieved, meanwhile, a buffering plate moves downwards under the gravity effect of the elevator car, the buffering plate pushes two second limiting plates located on the two sides to be away from each other under the combined effect of a pushing rod and a supporting plate, and therefore the elevator car can be buffered and damped; the second limiting plate can make contact with the elevator shaft, so that speed reduction and pause of the elevator car are achieved, direct falling of the elevator car is avoided, the elevator car can be directly braked through the damping and buffering device, potential energy release of the elevator car is avoided, and the stability of the elevator car during braking is enhanced.

Description

Technical Field

[0001] The invention relates to a buffer device, in particular to a shock absorbing buffer device for an elevator car, and belongs to the technical field of elevators. Background Art

[0002] Modern elevators usually use wire rope friction transmission. The wire rope is wrapped around the traction sheave, and the two ends are respectively connected to the car and the counterweight. The electric motor drives the traction sheave to make the car rise and fall. Elevators are required to be safe and reliable, have high transportation efficiency, accurate leveling and comfortable riding. With the development of real estate, elevators have exploded in growth, and with it comes the high rate of elevator accidents. Elevator safety has become a new hidden danger to urban public safety.

[0003] As the elevator ages, its parts will gradually age and wear out. If maintenance fails to replace these severely worn parts in time, or if the renovation work is not in place, it may cause accidents such as elevator falls during operation.

[0004] The known Chinese public authorized invention (publication number: CN110654955B) discloses an elevator car shock absorbing buffer device, which is provided with a shock absorbing mechanism at the bottom of the car. When the elevator is subjected to a large impact force, the air spring column cooperates with the buffer device of the bottom pit to reduce part of the pressure; the No. 2 telescopic rod cooperates with the No. 2 pressure spring to improve the buffering effect; the No. 1 buffer plate slides on the No. 1 slide groove, and the air spring and the buffer are extended and retracted to further reduce the pressure; the buffering effect is further improved by elastically extending and retracting the connecting spring, the No. 1 pressure spring and the No. 1 telescopic rod; The buffer mechanism configured at the bottom of the car can indeed provide a certain degree of buffering effect. However, the elevator itself is heavy, and especially when falling rapidly from a higher floor, it will accumulate and release huge potential energy. In this case, the traditional shock-absorbing and buffering mechanism is often difficult to fully cope with, and its buffering effect is relatively limited, and it is difficult to resist the impact potential energy of the elevator under extreme conditions. For this reason, a shock-absorbing and buffering device for an elevator car is proposed. Summary of the invention

[0005] In view of this, the present invention provides an elevator car shock absorbing and buffering device to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0006] The technical solution of the embodiment of the present invention is implemented as follows: an elevator car shock absorbing and buffering device includes a buffer shock absorbing assembly, wherein the buffer shock absorbing assembly includes a buffer plate, four first dampers, four first support springs, four guide rods, a support plate, two second limit plates, a sliding seat, eight push rods, a support seat, a second damper and a second support spring; The four first dampers and the four first support springs are symmetrically installed on the upper surface of the buffer plate, the buffer plate is slidably connected to the outer side walls of the four guide rods, the support plate is located below the buffer plate, the top ends of the four push rods located above are symmetrically rotationally connected to the lower surface of the buffer plate, the bottom ends of the other four push rods are symmetrically rotationally connected to the upper surface of the support plate, the adjacent ends of the two corresponding push rods above and below are symmetrically rotationally connected to the outer side walls of the two second limiting plates, the sliding seat is fixedly connected to the lower surface of the buffer plate, the support seat is fixedly connected to the upper surface of the support plate, and the second damper and the second support spring are both located inside the support seat.

[0007] Further preferably, the outer side wall of the sliding seat is slidably connected to the inner side wall of the supporting seat, the top end of the second damper is mounted on the lower surface of the sliding seat, and the bottom end of the second damper is mounted on the inner bottom wall of the supporting seat.

[0008] Further preferably, the second support spring is sleeved on the outside of the second damper, the top end of the second support spring is fixedly connected to the sliding seat, and the bottom end of the second support spring is fixedly connected to the support seat.

[0009] Further preferably, the buffer shock absorbing assembly further includes two limit seats, a fixing seat and a limit rod; The two limiting seats are fixedly connected to the two sides of the fixing seat through the limiting rods.

[0010] Further preferably, the fixing seat is fixedly connected to the outer side wall of the supporting seat, and the second limiting plate is slidably connected to the inside of the limiting seat.

[0011] Further preferably, the elevator car is arranged on the top of the buffer plate, and the top end of the first damper is installed on the lower surface of the elevator car.

[0012] Further preferably, the first support spring is sleeved on the outer side wall of the guide rod, the top end of the guide rod is fixedly connected to the lower surface of the elevator car, the top end of the first support spring supports the elevator car, and the bottom end of the first support spring supports the buffer plate.

[0013] Further preferably, the buffer shock absorbing assembly further includes a first limit plate, two mounting seats, two push rods, two push plates, a double-headed screw and a drive motor; The two mounting seats are symmetrically fixedly connected to the lower surface of the support plate, the first limit plate is fixedly connected to the push plate through the two push rods, the two push plates are symmetrically threadedly connected to the outer side walls of the double-headed screw, and the drive motor is installed on the lower surface of the support plate.

[0014] Further preferably, one end of the double-headed screw is rotatably connected to one of the mounting seats, the other end of the double-headed screw is fixedly connected to the motor shaft of the drive motor, and the push rod is slidably connected to the inside of the mounting seat.

[0015] Further preferably, an acceleration sensor and a controller are installed on the lower surface of the support plate, and a signal end of the controller is connected to a signal end of the acceleration sensor and a signal end of the drive motor respectively.

[0016] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution: The present invention can limit the position of the support plate under the cooperation of structures such as the first limit plate, the mounting seat, the push rod, the two push plates, the double-headed screw and the driving motor. The support plate is used as a base plate for support, and the elevator car pushes the guide rod to move downward. Through the cooperation of the first support spring and the first damper, the first buffering and shock absorption of the elevator car can be achieved. At the same time, the buffer plate moves downward under the gravity of the elevator car. Under the joint action of the push rod and the support plate, the buffer plate pushes the two second limit plates on both sides away from each other, so that the second limit plates can be brought into contact with the elevator shaft, thereby achieving deceleration and suspension of the elevator car to prevent the elevator car from falling directly. Moreover, through the cooperation of the second damper and the second support spring, when the elevator car is decelerated, it can play a role of second buffering and shock absorption. Compared with the prior art, the shock absorbing and buffering device of the present invention can directly brake the elevator car to prevent the elevator car from releasing potential energy. Moreover, by setting a double shock absorbing structure, the stability of the elevator car during braking is enhanced.

[0017] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a structural diagram of a shock absorbing and buffering device for an elevator car according to the present invention; Figure 2 It is a schematic diagram of the connection between the buffer shock absorbing assembly of the present invention and the elevator car; Figure 3It is a structural diagram of the buffer shock absorbing assembly of the present invention; Figure 4 This is a schematic diagram of disassembling the buffer and shock absorbing assembly of the present invention; Figure 5 It is a schematic diagram of the connection between the second limiting plate and the limiting seat of the present invention; Figure 6 It is a structural diagram of the support base of the present invention; Figure 7 This is a schematic diagram of the installation position of the acceleration sensor of the present invention; Figure 8 This is a structural diagram of the first limiting plate of the present invention.

[0020] 1. Buffer and shock absorbing assembly; 11. Buffer plate; 12. First damper; 13. First support spring; 14. Guide rod; 15. Support plate; 16. Second limit plate; 17. Limit seat; 18. Fixed seat; 19. Limit rod; 20. Sliding seat; 21. Push rod; 22. Support seat; 23. Second damper; 24. Second support spring; 31. Acceleration sensor; 32. Controller; 33. First limit plate; 34. Mounting seat; 35. Push rod; 36. Push plate; 37. Double-headed screw; 38. Drive motor; 40. Elevator car. DETAILED DESCRIPTION

[0021] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0022] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In the prior art, the buffer mechanism configured at the bottom of the car can indeed provide a certain degree of buffering effect. However, the elevator itself is heavy, especially when it falls rapidly from a higher floor, it will accumulate and release huge potential energy. In this case, the traditional shock-absorbing buffer mechanism is often difficult to fully cope with, and its buffering effect is relatively limited, and it is difficult to resist the impact potential energy of the elevator in extreme situations. To do this, see Figure 1-Figure 8 The embodiment of the present invention provides an elevator car shock absorbing and buffering device, including a buffer shock absorbing assembly 101, the buffer shock absorbing assembly 101 includes a buffer plate 11, four first dampers 12, four first support springs 13, four guide rods 14, a support plate 15, two second limit plates 16, a sliding seat 20, eight push rods 21, a support seat 22, a second damper 23 and a second support spring 24; The four first dampers 12 and the four first support springs 13 are symmetrically mounted on the upper surface of the buffer plate 11, the buffer plate 11 is slidably connected to the outer side walls of the four guide rods 14, the support plate 15 is located below the buffer plate 11, the top ends of the four push rods 21 located above are symmetrically rotatably connected to the lower surface of the buffer plate 11, the bottom ends of the other four push rods 21 are symmetrically rotatably connected to the upper surface of the support plate 15, the adjacent ends of the two corresponding push rods 21 above and below are symmetrically rotatably connected to the outer side walls of the two second limit plates 16, the sliding seat 20 is fixedly connected to the lower surface of the buffer plate 11, the support seat 22 is fixedly connected to the upper surface of the support plate 15, and the second damper 23 and the second support spring 24 are both located inside the support seat 22; When the elevator car 40 suddenly falls, the support plate 15 can play a supporting role, and then the elevator car 40 pushes the guide rod 14 to move downward, and the first support spring 13 and the first damper 12 are compressed. Through the cooperation of the first support spring 13 and the first damper 12, the first buffering and shock absorption of the elevator car 40 can be achieved; The elevator car 40 pushes the buffer plate 11 downward through the first support spring 13 and the first damper 12. Under the joint action of the push rod 21 and the support plate 15, the buffer plate 11 pushes the two second limit plates 16 on both sides. The two second limit plates 16 move away from each other, so that the second limit plates 16 can be brought into contact with the elevator shaft, thereby decelerating and pausing the elevator car 40 to prevent the elevator car 40 from falling directly. Moreover, through the cooperation of the second damper 23 and the second support spring 24, a second buffering and shock absorption effect can be achieved when decelerating the elevator car 40.

[0024] In one embodiment, the outer wall of the sliding seat 20 is slidably connected to the inner wall of the support seat 22, the top end of the second damper 23 is installed on the lower surface of the sliding seat 20, and the bottom end of the second damper 23 is installed on the inner bottom wall of the support seat 22. The second support spring 24 is sleeved on the outside of the second damper 23, the top end of the second support spring 24 is fixedly connected to the sliding seat 20, and the bottom end of the second support spring 24 is fixedly connected to the support seat 22. During the falling process of the elevator car 40, the cooperation of the second damper 23 and the second support spring 24 can play a role in buffering and shock absorption, thereby enhancing the stability of the elevator car 40.

[0025] In one embodiment, the buffer shock absorbing assembly 101 further includes two limiting seats 17, a fixing seat 18 and a limiting rod 19; The two limit seats 17 are fixedly connected to the two sides of the fixed seat 18 through the limit rod 19, the fixed seat 18 is fixedly connected to the outer wall of the support seat 22, and the second limit plate 16 is slidably connected to the inside of the limit seat 17. The position of the limit seat 17 can be limited by the limit rod 19. When the second limit plate 16 is pushed, the second limit plate 16 can be limited to enhance the stability of the structure.

[0026] In one embodiment, an elevator car 40 is disposed on the top of the buffer plate 11, a top end of the first damper 12 is mounted on the lower surface of the elevator car 40, a first support spring 13 is sleeved on the outer side wall of the guide rod 14, a top end of the guide rod 14 is fixedly connected to the lower surface of the elevator car 40, a top end of the first support spring 13 supports the elevator car 40, and a bottom end of the first support spring 13 supports the buffer plate 11; In order to solve the problems existing in the prior art, an embodiment of the present invention provides an elevator car shock absorbing and buffering device and solves the problems through the above technical solutions: The present invention provides a buffering and shock absorbing assembly 101. When the elevator car 40 suddenly falls, the support plate 15 is used as a base plate for support. At this time, the elevator car 40 pushes the guide rod 14 to move downward. Through the cooperation of the first support spring 13 and the first damper 12, the first buffering and shock absorbing of the elevator car 40 can be achieved. At the same time, the buffer plate 11 moves downward under the gravity of the elevator car 40. Under the joint action of the push rod 21 and the support plate 15, the buffer plate 11 pushes the two second limit plates 16 on both sides away from each other, so that the second limit plates 16 can contact with the elevator shaft, thereby achieving deceleration and suspension of the elevator car 40, avoiding the elevator car 40 from falling directly, and through the cooperation of the second damper 23 and the second support spring 24, when the elevator car 40 is decelerated, it can play a second buffering and shock absorbing role.

[0027] In one embodiment, the buffer and shock absorbing assembly 101 further includes a first limit plate 33, two mounting seats 34, two push rods 35, two push plates 36, a double-headed screw 37 and a driving motor 38; The two mounting seats 34 are symmetrically fixedly connected to the lower surface of the support plate 15, the first limit plate 33 is fixedly connected to the push plate 36 through two push rods 35, the two push plates 36 are symmetrically threadedly connected to the outer side walls of the double-headed screw 37, the driving motor 38 is installed on the lower surface of the support plate 15, one end of the double-headed screw 37 is rotatably connected to a mounting seat 34, the other end of the double-headed screw 37 is fixedly connected to the motor shaft of the driving motor 38, and the push rod 35 is slidably connected to the inside of the mounting seat 34; The double-headed screw 37 is driven to rotate by the driving motor 38, and the double-headed screw 37 drives two push plates 36 through the thread, and the push plate 36 drives the first limit plate 33 through the push rod 35, so that the two first limit plates 33 can be moved away from each other. The two first limit plates 33 respectively support the inner wall of the elevator shaft to limit the position of the support plate 15. The support plate 15 can be used to limit the position of the elevator car 40 to prevent the elevator car 40 from continuing to fall downward.

[0028] In one embodiment, an acceleration sensor 31 and a controller 32 are installed on the lower surface of the support plate 15. The signal end of the controller 32 is connected to the signal end of the acceleration sensor 31 and the signal end of the drive motor 38 respectively. The acceleration sensor 31 can monitor the working state of the elevator car 40. When the elevator car 40 falls, the acceleration sensor 31 sends a signal to the controller 32, and the controller 32 controls the drive motor 38 to work. Under the action of the drive motor 38, the position of the support plate 15 is limited, so that the buffer shock absorbing assembly 101 can work. The model of the controller 32 is: OHR-PR10, and the model of the acceleration sensor 31 is: GV50S.

[0029] When the present invention is working: the working state of the elevator car 40 is monitored by the acceleration sensor 31. When the elevator car 40 falls, the acceleration sensor 31 sends a signal to the controller 32. The controller 32 controls the driving motor 38 to work, and the double-headed screw 37 is driven to rotate by the driving motor 38. The double-headed screw 37 drives the two push plates 36 through the thread. The push plates 36 drive the first limit plates 33 through the push rods 35, so that the two first limit plates 33 can be moved away from each other. The two first limit plates 33 respectively support the inner wall of the elevator shaft to limit the position of the support plate 15. The elevator car 40 can be supported by the support plate 15. The elevator car 40 continues to move downward under the action of gravity. At this time, the first support spring 13 and the first damper 12 are compressed by the force. The cooperation between the support spring 13 and the first damper 12 can realize the first buffering and shock absorption of the elevator car 40. At the same time, the elevator car 40 pushes the buffer plate 11 to move downward through the first support spring 13 and the first damper 12. Under the joint action of the push rod 21 and the support plate 15, the buffer plate 11 pushes the two second limit plates 16 located on both sides. The two second limit plates 16 slide in the limit seats 17 and move away from each other, so that the second limit plates 16 can contact with the elevator shaft, thereby realizing the deceleration and suspension of the elevator car 40, avoiding the elevator car 40 from falling directly, and through the cooperation of the second damper 23 and the second support spring 24, when the elevator car 40 is decelerated, it can play a role of second buffering and shock absorption, thereby enhancing the stability of the elevator car 40.

[0030] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An elevator car shock absorbing and buffering device, comprising a buffer shock absorbing assembly (101), characterized in that: The buffer and shock absorbing assembly (101) comprises a buffer plate (11), four first dampers (12), four first support springs (13), four guide rods (14), a support plate (15), two second limit plates (16), a sliding seat (20), eight push rods (21), a support seat (22), a second damper (23) and a second support spring (24); The four first dampers (12) and the four first support springs (13) are symmetrically mounted on the upper surface of the buffer plate (11); the buffer plate (11) is slidably connected to the outer side walls of the four guide rods (14); the support plate (15) is located below the buffer plate (11); the top ends of the four push rods (21) located above are symmetrically rotationally connected to the lower surface of the buffer plate (11); the bottom ends of the other four push rods (21) are symmetrically rotationally connected to the upper surface of the support plate (15); the adjacent ends of the two corresponding push rods (21) above and below are symmetrically rotationally connected to the outer side walls of the two second limit plates (16); the sliding seat (20) is fixedly connected to the lower surface of the buffer plate (11); the support seat (22) is fixedly connected to the upper surface of the support plate (15); the second damper (23) and the second support spring (24) are both located inside the support seat (22).

2. The elevator car shock absorbing and buffering device according to claim 1, characterized in that: The outer wall of the sliding seat (20) is slidably connected to the inner wall of the supporting seat (22), the top end of the second damper (23) is mounted on the lower surface of the sliding seat (20), and the bottom end of the second damper (23) is mounted on the inner bottom wall of the supporting seat (22).

3. The elevator car shock absorbing and buffering device according to claim 2, characterized in that: The second support spring (24) is sleeved on the outside of the second damper (23), the top end of the second support spring (24) is fixedly connected to the sliding seat (20), and the bottom end of the second support spring (24) is fixedly connected to the support seat (22).

4. The elevator car shock absorbing and buffering device according to claim 3, characterized in that: The buffer and shock absorbing assembly (101) further comprises two limit seats (17), a fixing seat (18) and a limit rod (19); The two limiting seats (17) are fixedly connected to two sides of the fixing seat (18) via the limiting rods (19).

5. The elevator car shock absorbing and buffering device according to claim 4, characterized in that: The fixing seat (18) is fixedly connected to the outer side wall of the supporting seat (22), and the second limiting plate (16) is slidably connected to the inside of the limiting seat (17).

6. The elevator car shock absorbing and buffering device according to claim 1, characterized in that: An elevator car (40) is arranged on the top of the buffer plate (11), and a top end of the first damper (12) is mounted on the lower surface of the elevator car (40).

7. The elevator car shock absorbing and buffering device according to claim 6, characterized in that: The first support spring (13) is sleeved on the outer wall of the guide rod (14), the top end of the guide rod (14) is fixedly connected to the lower surface of the elevator car (40), the top end of the first support spring (13) supports the elevator car (40), and the bottom end of the first support spring (13) supports the buffer plate (11).

8. The elevator car shock absorbing and buffering device according to claim 7, characterized in that: The buffer and shock absorbing assembly (101) further comprises a first limit plate (33), two mounting seats (34), two push rods (35), two push plates (36), a double-headed screw (37) and a drive motor (38); The two mounting seats (34) are symmetrically fixedly connected to the lower surface of the support plate (15); the first limit plate (33) is fixedly connected to the push plate (36) via the two push rods (35); the two push plates (36) are symmetrically threadedly connected to the outer side walls of the double-headed screw (37); and the drive motor (38) is mounted on the lower surface of the support plate (15).

9. The elevator car shock absorbing and buffering device according to claim 8, characterized in that: One end of the double-headed screw (37) is rotatably connected to one of the mounting seats (34), the other end of the double-headed screw (37) is fixedly connected to the motor shaft of the drive motor (38), and the push rod (35) is slidably connected to the inside of the mounting seat (34).

10. The elevator car shock absorbing and buffering device according to claim 9, characterized in that: An acceleration sensor (31) and a controller (32) are mounted on the lower surface of the support plate (15), and a signal end of the controller (32) is respectively connected to a signal end of the acceleration sensor (31) and a signal end of the drive motor (38).

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