Elevator car floor cushioning structure and method

Abstract

The application discloses an elevator car bottom buffering structure and a buffering method, which respectively comprise a frame and a buffering platform, the top surface of the buffering platform is respectively provided with a group of regularly distributed buffering column capsules and pressure pad capsules, the bottom of the pressure pad capsules is fixedly connected with a gas delivery hose, the inner part of the gas delivery hose is respectively fixedly provided with a one-way air outlet valve and a pressure relief valve, a group of elastic drum pressure components which are regularly distributed and communicated with the gas delivery hose are arranged between the relative surfaces of the buffering platform and the frame, a group of guide rods are fixedly arranged between the inner surfaces of the frame, and the two side surfaces of the frame are respectively fixedly provided with a counterweight blocking mechanism and an elastic blocking mechanism connected with the guide rods and the buffering platform. Through the arrangement of the counterweight blocking mechanism and the elastic blocking mechanism, on one hand, the buffering device can achieve the counterweight blocking buffering effect during buffering, and on the other hand, the buffering device can achieve the multi-effect buffering and the active pressure charging type delay buffering effect during buffering.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and more specifically, to an elevator car bottom buffer structure and buffering method. Background Technology

[0002] Elevators are commonly used transportation equipment used to move people or goods to higher or lower floors. They are indispensable in high-rise buildings, scenic spots, and other similar locations. An elevator consists of an elevator shaft, a car, and a traction system, which pulls the car up and down within the elevator shaft.

[0003] Elevator shafts are often equipped with buffers, which are the final link in the elevator safety system. These buffers act as a buffer when the elevator malfunctions or crashes to the bottom, thus mitigating the impact on the elevator and its occupants. In the prior art, patent document CN216426415U discloses an elevator buffer device. In this device, when the elevator car falls, the car presses down on a stop block, which in turn moves a first buffer rod downwards. At this time, a first compression spring is compressed and absorbs energy and dampens shock. Simultaneously, as the first buffer rod descends, hydraulic oil is squeezed and flows into a branch circuit, pushing the piston away from the hydraulic chamber and compressing the elastic element, thus achieving energy absorption, buffering, and shock reduction. However, existing elevator car bottom buffer structures cannot achieve the counterweight delay effect during buffering, nor can they achieve multi-effect and active pressurized delay buffering. Therefore, this invention provides an elevator car bottom buffer structure and buffering method to solve the technical problems mentioned in the background art. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, the present invention aims to provide an elevator car bottom buffer structure and buffering method. By setting up a counterweight blocking mechanism and an elastic restraining mechanism, the present invention enables the buffer device to achieve a counterweight blocking buffering effect during buffering, and also enables the buffer device to achieve multi-effect buffering and active pressurized delay buffering effects during buffering.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: an elevator car bottom buffer structure, comprising a frame and a buffer platform. A set of regularly distributed buffer cylinders and pressurized pads are installed on the top surface of the buffer platform. An air supply hose is fixedly connected to the bottom of each pressurized pad. A one-way air outlet valve and a pressure relief valve are fixedly installed inside the air supply hose. A set of regularly distributed elastic drums connected to the air supply hose are installed between the opposing surfaces of the buffer platform and the frame. A set of guide rods is fixedly installed between the inner surfaces of the frame. A counterweight blocking mechanism and an elastic blocking mechanism connected to the guide rods and the buffer platform are fixedly installed on both sides of the frame.

[0008] As a preferred embodiment, the elastic drum includes a pneumatic tube fixedly connected to the frame and vertically arranged. A pneumatic piston is slidably connected to the inner wall of the pneumatic tube. A pneumatic rod is fixedly installed at the top of the pneumatic piston. The top of the pneumatic rod is fixedly connected to a buffer platform. A buffer spring is sleeved on the circumferential side of the pneumatic rod at the position between the pneumatic tube and the buffer platform. An air supply chamber communicating with an air supply hose is fixedly opened inside the pneumatic tube at the position between the pneumatic piston seat and the pneumatic tube.

[0009] As a preferred embodiment, the counterweight blocking mechanism includes a counterweight frame, a linkage shaft rotatably connected between the inner surfaces of the frame, and a set of regularly distributed guide gears fixed to the side of the buffer platform. The surface of the counterweight frame is fixedly equipped with guide posts that are slidably connected to the frame. A driven gear is fixedly installed on the surface of the counterweight frame corresponding to the position of each guide gear. A linkage gear is fixedly installed on the circumferential side of the linkage shaft corresponding to the position of each guide gear. The circumferential side of each guide gear is connected to the driven gear at the corresponding position through the linkage gear. A set of positioning screws is fixedly installed on the top surface of the counterweight frame, and a set of counterweight plates is installed on the top surface of the counterweight frame through the positioning screws.

[0010] As a preferred embodiment, the axes of the driven gear plate, the guide gear plate, and the guide post are all perpendicular to the horizontal plane, the axis of the linkage shaft is parallel to the horizontal plane, the cross-section of the guide post is "T" shaped, and the linkage gear is disposed between the driven gear plate and the guide gear plate.

[0011] As a preferred embodiment, the elastic blocking mechanism includes a guide roller and a winding roller rotatably connected between the inner surfaces of the frame. A set of regularly distributed winding wheels are fixedly installed on the circumferential side of the winding roller. A suspension cable is wound around the circumferential side of each winding wheel. The circumferential side of the suspension cable is in contact with the guide roller. The movable end of the suspension cable is fixedly connected to a buffer platform. A blocking gear is fixedly installed on the circumferential side of the winding roller at the position corresponding to each guide rod. A delay tooth plate is slidably connected to the circumferential side of each guide rod. The circumferential side of each delay tooth plate is slidably connected to the blocking gear at the corresponding position. A delay spring is sleeved on the circumferential side of each guide rod at the position between the frame and the delay tooth plate. Reciprocating air blowers driven by the winding roller are fixedly installed on both sides of the frame.

[0012] As a preferred embodiment, the axes of the guide roller and the winding roller are both parallel to the horizontal plane. The peripheral side of the guide roller and the position corresponding to each suspension cable are fixedly installed with a limiting guide wheel that fits against the suspension cable. The limiting guide wheel is an I-shaped wheel, and the suspension cable is made of elastic rubber.

[0013] As a preferred embodiment, the reciprocating air blower includes a transmission gear fixed to the end of the roller, a gear shaft rotatably connected to the surface of the frame, and an air blower pipe fixed to the surface of the frame. A differential gear and a half-gear are fixedly installed on the circumferential side of the gear shaft. The circumferential side of the differential gear is driven by the transmission gear. An air blower piston is slidably connected to the inner wall of the air blower pipe. A driven gear plate is fixedly installed on the end face of the air blower piston. The circumferential side of the driven gear plate is driven by the half-gear. An air blower chamber communicating with an air delivery hose is fixedly provided between the opposing surfaces of the air blower piston and the air blower pipe. A return spring is installed inside the air blower chamber. A one-way air inlet valve communicating with the air blower chamber is fixedly installed at the tail end of the air blower pipe.

[0014] As a preferred embodiment, the radius of the transmission gear is 8 to 15 times the radius of the differential gear, and the movable direction of the passive toothed plate is perpendicular to the axis of the roller.

[0015] As a preferred embodiment, both the buffer column and the pressure pad are made of silicone. The buffer column has a fixed air-filled cavity inside, which is filled with gas at a volume of half that of the air-filled cavity. The buffer column is lined with a plastic spring.

[0016] As a preferred embodiment, a buffering method for an elevator car bottom buffer structure includes the following steps:

[0017] SS001, Installation: Before the elevator car bottom buffer structure is put into operation, the frame is fixed to the bottom of the elevator shaft through the positioning connector. In the initial mode, the air-filled cavity inside the buffer column is pre-filled with half a amount of gas.

[0018] SS002, Buffer Operation: When the elevator car moves towards the buffer platform, it first contacts the buffer cylinder. After the buffer cylinder is compressed, the gas and plastic spring inside the buffer cylinder provide initial buffering for the elevator car. After the buffer platform is compressed and moves downward, the guide tooth plate moves downward with the buffer platform. The counterweight plate provides counterweight delay for the movement trend of the buffer platform. At the same time, after the buffer platform moves downward, the roller rotates driven, and the delay spring provides secondary delay for the downward movement trend of the buffer platform. When the roller rotates, the reciprocating air blower blows air unidirectionally into the pressure pad, thereby actively pressurizing and delaying the downward movement trend of the buffer platform.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, the present invention provides a buffer structure and buffering method for the bottom of an elevator car, which has the following beneficial effects.

[0021] 1. By setting up a counterweight blocking mechanism and an elastic blocking mechanism, this invention enables the buffer device to achieve a counterweight blocking buffering effect during buffering, and also enables the buffer device to achieve multi-effect buffering and active pressure-type delay buffering effects during buffering.

[0022] 2. In this invention, when the elevator car moves toward the buffer platform, the elevator car first contacts the buffer column. After the buffer column is compressed, the gas inside the buffer column and the shaping spring provide initial buffering for the elevator car. After the buffer platform is compressed and moves downward, the guide tooth plate moves downward with the buffer platform. The counterweight plate provides counterweight to delay the movement trend of the buffer platform. At the same time, after the buffer platform moves downward, the roller rotates driven, and the delay spring provides secondary delay for the downward movement trend of the buffer platform. When the roller rotates, the reciprocating air blower blows air unidirectionally into the pressure pad, thereby actively pressurizing and delaying the downward movement trend of the buffer platform. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a buffer structure at the bottom of an elevator car according to the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the pressurized pad and guide roller of the present invention;

[0025] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0026] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the local structure at point B;

[0027] Figure 5 This is a schematic diagram of the counterweight plate and driven toothed plate of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the buffer platform and the guide tooth plate of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the hoisting cable and transmission gear of the present invention;

[0030] Figure 8 For the present invention Figure 7 A magnified schematic diagram of the local structure at point C;

[0031] Figure 9 This is a schematic diagram of the transmission gear and differential gear of the present invention;

[0032] Figure 10 This is a cross-sectional schematic diagram of the reset spring and air tube of the present invention.

[0033] In the diagram: 1. Frame; 2. Buffer platform; 3. Buffer cylinder; 4. Pressurized pad; 5. Air supply hose; 6. Guide rod; 7. Pneumatic pipe; 8. Pneumatic rod; 9. Buffer spring; 10. Counterweight frame; 11. Linkage shaft; 12. Guide gear plate; 13. Guide column; 14. Driven gear plate; 15. Linkage gear; 16. Counterweight plate; 17. Guide roller; 18. Winding roller; 19. Suspension cable; 20. Blocking gear; 21. Delay gear plate; 22. Delay spring; 23. Transmission gear; 24. Blower pipe; 25. Differential gear; 26. Half-loose gear; 27. Driven gear plate; 28. Return spring; 29. ​​Blower chamber; 30. One-way air inlet valve. Detailed Implementation

[0034] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0035] Please see Figure 1-10 The present invention is a buffer structure for the bottom of an elevator car. The technical solution adopted is as follows: it includes a frame 1 and a buffer platform 2. A set of regularly distributed buffer columns 3 and pressurized pads 4 are installed on the top surface of the buffer platform 2.

[0036] Both the buffer bladder 3 and the pressure pad bladder 4 are made of silicone.

[0037] The buffer bladder 3 has a fixed air-filled cavity inside, which is filled with gas. The gas filling amount is half the volume of the air-filled cavity. The buffer bladder 3 is lined with a plastic spring.

[0038] By setting the shaping spring, the buffer cylinder 3 can be effectively shaped;

[0039] The bottom of the pressurized bladder 4 is fixedly connected to an air supply hose 5. A one-way air outlet valve and a pressure relief valve are fixedly installed inside the air supply hose 5. By setting the one-way air outlet valve, the gas inside the air supply hose 5 can only be sent into the pressurized bladder 4 in one direction.

[0040] By using the inflatable structure of the pressurized bladder 4, the movement trend of the car is actively delayed.

[0041] A set of regularly distributed elastic drum-shaped components connected to the air supply hose 5 are installed between the opposing surfaces of the buffer platform 2 and the frame 1.

[0042] The elastic drum includes a pneumatic tube 7 that is fixedly connected to the frame 1 and is vertically arranged. A pneumatic piston is slidably connected to the inner wall of the pneumatic tube 7. A pneumatic rod 8 is fixedly installed on the top of the pneumatic piston. The top of the pneumatic rod 8 is fixedly connected to the buffer platform 2. A buffer spring 9 is sleeved on the circumferential side of the pneumatic rod 8 at the position between the pneumatic tube 7 and the buffer platform 2. An air supply chamber communicating with the air supply hose 5 is fixedly opened inside the pneumatic tube 7 at the position between the pneumatic piston seat and the pneumatic tube 7.

[0043] When the buffer platform 2 moves downward, the downward movement of the buffer platform 2 acts on the pneumatic rod 8 and the pneumatic piston. After the pneumatic piston moves downward, the gas inside the air chamber is sent unidirectionally into the pressure bladder 4, and then the pressure bladder 4 is inflated and pressurized.

[0044] A set of guide rods 6 are fixedly installed between the inner surfaces of the frame 1. A counterweight blocking mechanism and an elastic blocking mechanism connected to the guide rods 6 and the buffer platform 2 are fixedly installed on both sides of the frame 1.

[0045] The counterweight blocking mechanism includes a counterweight frame 10, a linkage shaft 11 rotatably connected between the inner surfaces of the frame 1, and a set of regularly distributed guide tooth plates 12 fixed to the side of the buffer platform 2. The surface of the counterweight frame 10 is fixedly equipped with a guide post 13 that is slidably connected to the frame 1. The cross-section of the guide post 13 is "T".

[0046] A driven toothed plate 14 is fixedly installed on the surface of the counterweight frame 10 and at the position corresponding to each guide toothed plate 12. A linkage gear 15 is fixedly installed on the circumferential side of the linkage shaft 11 and at the position corresponding to each guide toothed plate 12. The circumferential side of each guide toothed plate 12 is connected to the driven toothed plate 14 at the corresponding position through the linkage gear 15. The axes of the driven toothed plate 14, the guide toothed plate 12 and the guide column 13 are all perpendicular to the horizontal plane. The axis of the linkage shaft 11 is parallel to the horizontal plane. The linkage gear 15 is disposed between the driven toothed plate 14 and the guide toothed plate 12.

[0047] A set of positioning screws is fixedly installed on the top surface of the counterweight frame 10, and a set of counterweight plates 16 are installed on the top surface of the counterweight frame 10 through the positioning screws.

[0048] When the buffer platform 2 is acted upon by the car and moves downward, the displacement of the buffer platform 2 is transmitted to the counterweight frame 10 and the driven gear 14 through the guide tooth plate 12 and the linkage gear 15. Due to the arrangement of the counterweight plate 16 on the counterweight frame 10, the elevator car is then subjected to counterweight-type delay.

[0049] The number of counterweight plates 16 installed can be customized according to actual needs. The buffering strength of the elevator car bottom buffer structure can be adjusted by adjusting the number of counterweight plates 16 installed.

[0050] The elastic blocking mechanism includes a guide roller 17 and a winding roller 18 rotatably connected between the inner surfaces of the frame 1. The axes of the guide roller 17 and the winding roller 18 are parallel to the horizontal plane. A set of regularly distributed winding wheels are fixedly installed on the circumferential side of the winding roller 18. A suspension cable 19 is wound on the circumferential side of each winding wheel. The circumferential side of the suspension cable 19 is in contact with the guide roller 17. A limiting guide wheel that is in contact with the suspension cable 19 is fixedly installed on the circumferential side of the guide roller 17 and at the position corresponding to each suspension cable 19. The limiting guide wheel is an I-shaped wheel.

[0051] The movable end of the suspension cable 19 is fixedly connected to the buffer platform 2. The suspension cable 19 is made of elastic rubber. By using the elastic rubber material of the suspension cable 19, the buffering effect of the car bottom buffer structure is improved.

[0052] A blocking gear 20 is fixedly installed on the circumferential side of the roller 18 and at the position corresponding to each guide rod 6. A delay tooth plate 21 is slidably connected to the circumferential side of each guide rod 6. The circumferential side of each delay tooth plate 21 is slidably connected to the blocking gear 20 at the corresponding position. A delay spring 22 is sleeved on the circumferential side of each guide rod 6 at the position corresponding to the position between the frame 1 and the delay tooth plate 21. Reciprocating air blowers driven by the roller 18 are fixedly installed on both sides of the frame 1.

[0053] The reciprocating air blower includes a transmission gear 23 fixed to the end of the roller 18, a gear shaft rotatably connected to the surface of the frame 1, and an air blower pipe 24 fixed to the surface of the frame 1. A differential gear 25 and a half-loose gear 26 are fixedly installed on the circumferential side of the gear shaft, and the circumferential side of the differential gear 25 is connected to the transmission gear 23 in a transmission connection.

[0054] The radius of the transmission gear 23 is 15 times the radius of the differential gear 25;

[0055] By setting the radius difference between the transmission gear plate and the differential gear 25, the transmission ratio of the transmission gear 23 to the differential gear 25 is effectively improved.

[0056] An air-blowing piston is slidably connected to the inner wall of the air-blowing pipe 24. A passive toothed plate 27 is fixedly installed on the end face of the air-blowing piston. The movable direction of the passive toothed plate 27 is perpendicular to the axis of the roller 18.

[0057] The peripheral side of the passive gear plate 27 is connected to the half-gear 26 for transmission. An air chamber 29 connected to the air supply hose 5 is fixedly provided between the relative surfaces of the air blower piston and the air blower pipe 24. A return spring 28 is installed inside the air chamber 29. A one-way air inlet valve 30 connected to the air chamber 29 is fixedly installed at the tail end of the air blower pipe 24.

[0058] By setting the one-way air intake valve 30, external gas can only be sent into the air chamber 29 in one direction.

[0059] By setting up the return spring 28, the half-gear 26 and the passive gear plate 27, the air pipe 24 can send external gas into the pressurized bladder 4 in a reciprocating unidirectional manner when the transmission gear 23 rotates.

[0060] A buffering method for an elevator car bottom buffer structure includes the following steps:

[0061] SS001, Installation: Before the elevator car bottom buffer structure is put into operation, the frame 1 is fixed to the bottom of the elevator shaft through the positioning connector. In the initial mode, the air-filled cavity inside the buffer column 3 is pre-filled with half a amount of gas.

[0062] SS002, Buffer Operation: When the elevator car moves towards the buffer platform 2, the elevator car first contacts the buffer cylinder 3. After the buffer cylinder 3 is compressed, the gas and plastic spring inside the buffer cylinder 3 provide initial buffering for the elevator car. After the buffer platform 2 is compressed and moves downward, the guide tooth plate 12 moves downward with the buffer platform 2. The counterweight plate 16 provides counterweight to delay the movement trend of the buffer platform 2. At the same time, after the buffer platform 2 moves downward, the roller 18 rotates driven. The delay spring 22 provides secondary delay for the downward movement trend of the buffer platform 2. When the roller 18 rotates, the reciprocating air blower blows air unidirectionally into the pressure pad 4, thereby actively pressurizing and delaying the downward movement trend of the buffer platform 2.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A buffer structure for the bottom of an elevator car, comprising a frame (1) and a buffer platform (2), characterized in that: The top surface of the buffer platform (2) is equipped with a set of regularly distributed buffer cylinders (3) and pressurized pads (4). The bottom of the pressurized pads (4) is fixedly connected to an air supply hose (5). The air supply hose (5) is fixedly installed with a one-way air outlet valve and a pressure relief valve. A set of regularly distributed elastic drums connected to the air supply hose (5) are installed between the relative surfaces of the buffer platform (2) and the frame (1). A set of guide rods (6) are fixedly installed between the inner surfaces of the frame (1). The two sides of the frame (1) are fixedly equipped with a counterweight blocking mechanism and an elastic blocking mechanism connected to the guide rods (6) and the buffer platform (2). The elastic drum includes a pneumatic tube (7) fixedly connected to the frame (1) and vertically arranged. A pneumatic piston is slidably connected to the inner wall of the pneumatic tube (7). A pneumatic rod (8) is fixedly installed at the top of the pneumatic piston. The top of the pneumatic rod (8) is fixedly connected to the buffer platform (2). A buffer spring (9) is sleeved on the circumferential side of the pneumatic rod (8) at the position between the pneumatic tube (7) and the buffer platform (2). An air supply chamber communicating with the air supply hose (5) is fixedly opened inside the pneumatic tube (7) at the position between the pneumatic piston seat and the pneumatic tube (7). The counterweight blocking mechanism includes a counterweight frame (10), a linkage shaft (11) rotatably connected between the inner surfaces of the frame (1) and a set of regularly distributed guide tooth plates (12) fixed to the side of the buffer platform (2). The surface of the counterweight frame (10) is fixedly equipped with guide posts (13) that are slidably connected to the frame (1). The surface of the counterweight frame (10) and the position corresponding to each guide tooth plate (12) are fixedly equipped with driven tooth plates (14). The peripheral side of the linkage shaft (11) and the position corresponding to each guide tooth plate (12) are fixedly equipped with linkage gears (15). The peripheral side of each guide tooth plate (12) is connected to the driven tooth plate (14) at the corresponding position through the linkage gears (15). The top surface of the counterweight frame (10) is fixedly equipped with a set of positioning screws. The top surface of the counterweight frame (10) is equipped with a set of counterweight plates (16) through the positioning screws. The elastic blocking mechanism includes a guide roller (17) and a winding roller (18) rotatably connected between the inner surfaces of the frame (1). A set of regularly distributed winding wheels are fixedly installed on the circumferential side of the winding roller (18). A suspension cable (19) is wound around the circumferential side of each winding wheel. The circumferential side of the suspension cable (19) is in contact with the guide roller (17). The movable end of the suspension cable (19) is fixedly connected to the buffer platform (2). The circumferential side of the winding roller (18) corresponds to the position of each guide rod (6). Each guide rod (6) is fixedly installed with a blocking gear (20), and each guide rod (6) is slidably connected with a delay tooth plate (21). The circumferential side of each delay tooth plate (21) is slidably connected with the blocking gear (20) at the corresponding position. Each guide rod (6) is fitted with a delay spring (22) at the position between the frame (1) and the delay tooth plate (21). Both sides of the frame (1) are fixedly installed with reciprocating air blowers driven by rollers (18).

2. The elevator car bottom buffer structure according to claim 1, characterized in that: The axes of the driven toothed plate (14), the guide toothed plate (12) and the guide post (13) are all perpendicular to the horizontal plane, the axis of the linkage shaft (11) is parallel to the horizontal plane, the cross-section of the guide post (13) is "T" shaped, and the linkage gear (15) is disposed between the driven toothed plate (14) and the guide toothed plate (12).

3. The elevator car bottom buffer structure according to claim 1, characterized in that: The axes of the guide roller (17) and the winding roller (18) are parallel to the horizontal plane. The peripheral side of the guide roller (17) and the position corresponding to each suspension cable (19) are fixedly installed with a limiting guide wheel that fits against the suspension cable (19). The limiting guide wheel is an I-shaped wheel, and the suspension cable (19) is made of elastic rubber.

4. The elevator car bottom buffer structure according to claim 3, characterized in that: The reciprocating air blower includes a transmission gear (23) fixed to the end of the roller (18), a gear shaft rotatably connected to the surface of the frame (1), and an air blower pipe (24) fixed to the surface of the frame (1). A differential gear (25) and a half-gear (26) are fixedly installed on the circumferential side of the gear shaft. The circumferential side of the differential gear (25) is connected to the transmission gear (23). An air blower piston is slidably connected to the inner wall of the air blower pipe (24). A passive toothed plate (27) is fixedly installed on the end face of the air blower. The circumferential side of the passive toothed plate (27) is connected to the half-gear (26). An air blower chamber (29) communicating with the air delivery hose (5) is fixedly provided between the air blower piston and the relative surface of the air blower pipe (24). A return spring (28) is installed inside the air blower chamber (29). A one-way air inlet valve (30) communicating with the air blower chamber (29) is fixedly installed at the tail end of the air blower pipe (24).

5. The elevator car bottom buffer structure according to claim 4, characterized in that: The radius of the transmission gear (23) is 8 to 15 times the radius of the differential gear (25), and the movable direction of the passive toothed plate (27) is perpendicular to the axis of the roller (18).

6. The elevator car bottom buffer structure according to claim 5, characterized in that: Both the buffer bladder (3) and the pressure pad bladder (4) are made of silicone. The buffer bladder (3) has a fixed air-filled cavity inside, and the air-filled cavity is fixedly filled with gas. The amount of gas filling is half the volume of the air-filled cavity. The buffer bladder (3) is lined with a plastic spring.

7. A buffering method for an elevator car bottom buffer structure according to any one of claims 1-6, characterized in that, Includes the following steps: SS001, Installation: Before the elevator car bottom buffer structure is put into operation, the frame (1) is fixed to the bottom of the elevator shaft through the positioning connector. In the initial mode, the air-filled cavity inside the buffer column (3) is pre-filled with half a amount of gas. SS002, Buffer Operation: When the elevator car moves toward the buffer platform (2), the elevator car first contacts the buffer column (3). After the buffer column (3) is compressed, the gas inside the buffer column (3) and the plastic spring buffer the elevator car once. After the buffer platform (2) is compressed and moves downward, the guide tooth plate (12) moves downward with the buffer platform (2). The counterweight plate (16) provides counterweight to delay the movement trend of the buffer platform (2). At the same time, after the buffer platform (2) moves downward, the roller (18) rotates driven. The delay spring (22) delays the downward movement trend of the buffer platform (2) a second time. When the roller (18) rotates, the reciprocating air blower blows air into the pressure pad (4) in one direction, thereby actively pressurizing and delaying the downward movement trend of the buffer platform (2).

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