Shock absorbing device for an elevator car and method of operation thereof

Abstract

The application discloses an elevator car shockproof buffer device and a working method thereof, wherein the shockproof buffer device comprises steel frames, sliding parts are mounted on both sides of each steel frame, constant force springs are connected between the sliding parts and the inner walls of the steel frames, bottom steel frames are fixedly mounted at the bottoms of the sliding parts, arc-shaped friction plate frames are arranged on one side of the sliding parts, the arc-shaped friction plate frames are connected with the sliding parts through connecting pieces, hydraulic sleeves are mounted in the steel frames, and sealing plate frames are mounted in the hydraulic sleeves. When the piston rod frames contact with the buffers, the buffers, the buffer springs between the piston rod frames and the hydraulic sleeves and the damping movement of the sealing plate frames in the hydraulic sleeves can effectively buffer the overspeed and bottom movement of the car body, and in the energy release process, the cooperation of the supporting shaft bodies and the steel blocks can effectively block the reset upward movement of the car body, so that the probability of secondary collision is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of elevator equipment, in particular to a shockproof buffer device for elevator car. BACKGROUND

[0002] With the acceleration of urbanization process, the number of high-rise buildings is increasing rapidly. As the core equipment of vertical transportation, the operation safety and ride comfort of the elevator become the key indicators. The reliability and safety of the elevator are closely related to the life safety of passengers. Therefore, the elevator needs to install necessary safety detection and safety protection devices, such as elevator buffer. The buffer is the last link of the elevator safety system, which plays a buffering role when the elevator fails or accident squatting at the bottom, thereby relieving the elevator or people in the elevator from direct impact.

[0003] As the last line of defense of the safety system, the core function of the elevator buffer is to reduce the impact force by kinetic energy absorption mechanism when the car occurs squatting at the bottom (out of control falling or overspeed bottoming). The buffer relies on spring or hydraulic oil to release the out-of-control or overspeed bottoming condition of the car. In the application process, if the elevator car appears out-of-control overspeed condition due to other factors, the car bottom will contact the buffer, and under the buffering effect of the buffer, the kinetic energy of the car when bottoming is reduced. If the buffer used is a spring buffer, then in the subsequent energy release process, the car is prone to rebound, increasing the risk of secondary collision. If a hydraulic buffer is used, when the overspeed bottoming condition occurs, since the damping force adjustment of the hydraulic buffer depends on the mechanical orifice, when the speed is fast, the oil discharge is not timely, and the piston is stuck, which will cause the buffer stroke to be insufficient, so that the buffer system is degenerated into a nearly rigid collision, increasing the risk of secondary collision. Therefore, we propose a shockproof buffer device for elevator car. SUMMARY

[0004] The purpose of the present application is to provide a shockproof buffer device for elevator car and its working method to solve the problems raised in the background.

[0005] In order to achieve the above object, the present application provides the following technical scheme: A shock absorbing device for an elevator car, comprising a steel frame fixedly installed on the bottom of the car body and located directly above the buffer in the pit, a sliding part slidably connected to the inner wall of each steel frame, a constant force spring connected between the top of the sliding part and the inner wall of the steel frame, a bottom steel frame fixedly installed on the bottom of the sliding part, an arc-shaped friction plate frame provided on one side of each sliding part, and the arc-shaped friction plate frame being connected to the sliding part through a connecting piece; when the bottom steel frame contacts the ground, the arc-shaped friction plate frame is in close contact with the surface of the buffer under the action of the connecting piece, wherein a hydraulic sleeve filled with hydraulic oil is further fixedly installed inside the steel frame, a sealing plate frame slidably connected to the inner wall of the hydraulic sleeve is installed inside the hydraulic sleeve, a piston rod frame slidably connected to the inner wall of the hydraulic sleeve is installed on the sealing plate frame, and the end of the piston rod frame penetrates through the hydraulic sleeve and extends to the outside, and the buffer is located on the movement track of the piston rod frame.

[0006] Preferably, the connecting piece comprises a steel sleeve fixedly installed inside the sliding part, and a connecting shaft body slidably connected to the inner wall of the steel sleeve, the end of the connecting shaft body is fixedly connected to the arc-shaped friction plate frame, one end of the connecting shaft body located inside the steel sleeve is further fixedly installed with a square magnet block, and a spring part is connected between the square magnet block and the inner wall of the steel sleeve, wherein an extension support is fixedly installed on both sides of the steel frame, and a magnet is installed on the extension support; when the bottom steel frame contacts the ground, the magnet passes through the steel sleeve during the descending process of the extension support, so as to generate a repulsive force on the square magnet block inside the steel sleeve, and push the arc-shaped friction plate frames on both sides to relatively approach each other, so that the arc-shaped friction plate frames on both sides are clamped below the upper circular steel plate of the buffer.

[0007] Preferably, a positioning plate frame is symmetrically installed on one of the arc-shaped friction plate frames, a plurality of telescopic parts are installed on the positioning plate frame, a positioning frame is symmetrically installed on the other arc-shaped friction plate frame, and a clamping hole capable of allowing the telescopic part to be clamped is provided on the positioning frame.

[0008] Preferably, a plurality of damping holes are provided on the sealing plate frame, and an annular sleeve is rotatably connected to the sealing plate frame but cannot be axially moved, a plurality of shielding plate frames corresponding to the damping holes are fixedly installed on the annular sleeve, and the overlapping area of the shielding plate frames and the damping holes changes through the rotation of the annular sleeve.

[0009] Preferably, a stress shaft body is axially slidably connected inside the annular sleeve, a cavity is formed in the piston rod frame, a spring mechanism is installed on the inner wall of the cavity, and one end of the stress shaft body is in contact with the spring mechanism, a rolling ball is movably connected to the inner wall of the stress shaft body, and an arc-shaped groove is further provided on the inner wall of the cavity, and the rolling ball is limitingly slid in the arc-shaped groove.

[0010] Preferably, the force receiving shaft body is fixedly installed with a conical force receiving plate frame at one end outside the annular sleeve, and a buffer spring is connected between the flange at the end of the piston rod frame and the outer wall at the end of the hydraulic sleeve.

[0011] Preferably, support frames are further fixedly installed on both sides of the hydraulic sleeve, and a connecting sleeve is fixedly installed inside the support frames, wherein a support shaft body is installed inside the connecting sleeve in sliding connection with the inner wall of the connecting sleeve, one end of the support shaft body is located outside the connecting sleeve, a spring body is connected between the other end of the support shaft body and the inner wall of the connecting sleeve, and a ball is embedded at one end of the support shaft body outside the connecting sleeve.

[0012] Preferably, a positioning steel plate is fixedly installed on the sliding part, and a plurality of steel blocks are fixedly installed on the positioning steel plate, the steel blocks being located on the movement track of the support shaft body.

[0013] Preferably, the cross section of the steel block is in the shape of a right-angled trapezoid, and the inclined surface of the right-angled trapezoid faces upward.

[0014] Preferably, the opening end of the positioning frame is arranged in an inclined manner.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] When the piston rod frame contacts the bumper, the bumper, the buffer spring between the piston rod frame and the hydraulic sleeve, and the damping movement of the sealing plate frame inside the hydraulic sleeve can effectively buffer the overspeed bottoming movement of the car body, absorb the energy when bottoming, and effectively block the reset upward movement of the car body by cooperation of the support shaft body and the steel block during the energy release process, thereby reducing the probability of secondary collision.

[0017] The present application limits the bottoming steel frame contacting the ground by the arc-shaped friction plate frame, avoids the synchronous movement of the sliding part and the bottoming steel frame thereon during the reset process of the car body, effectively limits the support shaft body corresponding to the car body through the steel block corresponding to the sliding part, thereby effectively blocking the reset upward movement of the car body and reducing the probability of secondary collision; and under the action of the conical force receiving plate frame, the oil permeation area of the damping hole on the sealing plate frame is adapted to the descending speed of the car body, that is, the faster the descending speed of the car body, the larger the oil permeation area of the damping hole, thereby reducing the hydraulic resistance to avoid overloading of the device and improve safety. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The figure is a schematic diagram of the overall structure of the present application;

[0019] Figure 2 The figure is a schematic diagram of the steel frame structure of the present application;

[0020] Figure 3The schematic diagram of the steel frame and the buffer structure of the present application;

[0021] Figure 4 The schematic diagram of the arc-shaped friction plate frame and the buffer in the hoop connection state structure of the present application;

[0022] Figure 5 The schematic diagram of the steel frame and the sliding part structure of the present application;

[0023] Figure 6 The schematic diagram of the connecting piece structure of the present application;

[0024] Figure 7 The schematic diagram of the support shaft body and the steel block structure of the present application;

[0025] Figure 8 The schematic diagram of the positioning steel plate and the steel block structure of the present application;

[0026] Figure 9 The schematic diagram of the arc-shaped friction plate frame and the buffer structure of the present application;

[0027] Figure 10 The schematic diagram of the internal structure of the hydraulic sleeve of the present application;

[0028] Figure 11 The schematic diagram of the sealing plate frame structure of the present application;

[0029] Figure 12 The schematic diagram of the internal structure of the sealing plate frame and the piston rod frame of the present application;

[0030] Figure 13 The schematic diagram of the separation of the force receiving shaft body and the piston rod frame structure of the present application;

[0031] Figure 14 The schematic diagram of the position structure of the shielding plate frame and the damping hole of the present application.

[0032] In the figure: 1, car body; 2, buffer; 21, circular steel plate; 3, steel frame; 31, extension support; 32, magnet; 4, sliding part; 41, constant force spring; 42, bottom steel frame; 43, arc-shaped friction plate frame; 44, positioning plate frame; 45, telescopic part; 46, positioning frame; 47, clamping hole; 48, positioning steel plate; 49, steel block; 5, connecting piece; 51, steel sleeve; 52, connecting shaft body; 53, square magnet block; 54, spring part; 6, hydraulic sleeve; 61, sealing plate frame; 62, piston rod frame; 621, cavity; 622, spring mechanism; 623, arc-shaped groove body; 624, flange; 63, damping hole; 64, annular sleeve; 65, shielding plate frame; 66, force receiving shaft body; 661, rolling ball; 67, conical force receiving plate frame; 68, buffer spring; 7, support frame; 71, connecting sleeve; 72, support shaft body; 73, spring body. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0034] Please refer to Figures 1-14 The present application provides a technical solution: a shock-absorbing device for an elevator car, comprising steel frames 3 fixedly installed at the bottom of the car body 1 and located directly above the buffers 2. The buffers 2 in the present application are components of the prior art, which can be spring buffers or hydraulic buffers. Each steel frame 3 has sliding parts 4 slidingly connected to the inner wall thereof on both sides, and a constant force spring 41 connected between the sliding part 4 and the inner wall of the steel frame 3. The bottom of the sliding part 4 is fixedly installed with a bottom-touching steel frame 42. One side of each sliding part 4 is provided with an arc-shaped friction plate frame 43, which is connected to the sliding part 4 through a connecting piece 5. As shown in the accompanying drawings, Figure 2 -attached Figure 4 As shown in the accompanying drawings, the buffer 2 is generally cylindrical in shape, and a circular steel plate is generally installed on the top. When the bottom-touching steel frame 42 contacts the ground, the arc-shaped friction plate frame 43 is in close contact with the surface of the buffer 2 under the action of the connecting piece 5 and contacts the circular steel plate below (and the two arc-shaped friction plate frames 43 are clamped below the circular steel plate 21). In the specific use process, the length of the bottom-touching steel frame 42 can be designed to make the arc-shaped friction plate frame 43 contact the circular steel plate below the top of the buffer 2. As shown in the accompanying drawings, Figure 9As shown, the positioning plate frame 44 is symmetrically fixed on one of the arc-shaped friction plate frames 43, and a plurality of telescopic parts 45 are installed on the positioning plate frame 44, and the positioning frame 46 is symmetrically installed on the other arc-shaped friction plate frame 43, and the clamping hole 47 is arranged on the positioning frame 46, and the opening end of the positioning frame 46 is arranged in an inclined manner, in the initial state, that is, when the bottom contact steel frame 42 is not in contact with the ground, at this time, the arc-shaped friction plate frame 43 is not in contact with the buffer 2, when the bottom contact steel frame 42 is in contact with the ground, at this time, the arc-shaped friction plate frame 43 is in contact with the buffer 2, and the positioning plate frame 44 on one of the arc-shaped friction plate frames 43 enters the positioning frame 46, in this process, because the opening side wall of the positioning frame 46 is arranged in an inclined manner, when the telescopic part 45 on the positioning plate frame 44 enters the opening end of the positioning frame 46, the opening end of the positioning frame 46 exerts a force on the telescopic part 45, so that the telescopic part 45 is in a contracted state and enters the positioning frame 46, and the telescopic part 45 is reset when it moves to the clamping hole 47, that is, the telescopic part 45 finally enters the clamping hole 47, so that the two arc-shaped friction plate frames 43 are in a clamping state.

[0035] As a further limitation of the application, the connecting piece 5 includes a steel sleeve 51 fixedly installed inside the sliding part 4 (as shown in Figure 3 , 6 ), a connecting shaft body 52 in sliding connection with the inner wall of the steel sleeve 51, the end of the connecting shaft body 52 is fixedly connected with the arc-shaped friction plate frame 43, one end of the connecting shaft body 52 inside the steel sleeve 51 is also fixedly installed with a square magnet block 53, and the spring part 54 is connected between the square magnet block 53 and the inner wall of the steel sleeve 51, and the extension support 31 is fixedly installed on both sides of the steel frame 3, and the magnet 32 is installed on the extension support 31, when the bottom contact steel frame 42 is in contact with the ground, the magnet 32 passes through the steel sleeve 51 during the descending process of the extension support 31, so as to generate a repulsive force on the square magnet block 53 inside the steel sleeve 51.

[0036] In combination with the accompanying drawings Figure 2 , the drawings Figure 3 , the drawings Figure 5 , the drawings Figure 6 and the drawings Figure 9When the car body 1 overspeeds and hits the bottom, the steel frame 3 drives the sliding part 4 and the bottom hitting steel frame 42 to move quickly to the ground, wherein the bottom hitting steel frame 42 first contacts the ground, and the ground supports the bottom hitting steel frame 42 to be in a static state, that is, the sliding part 4 is in a static state. With the descending movement of the car body 1, the inner wall of the steel frame 3 moves towards the ground and extrudes the constant force spring 41. The magnet 32 on the extension support 31 passes through the steel sleeve 51. The magnet 32 generates a repulsive force on the square magnet block 53 inside the steel sleeve 51, so that the square magnet block 53 drives the arc-shaped friction plate frame 43 to move towards the buffer 2 through the connecting shaft body 52. In this process, the spring part 54 is extruded by the square magnet block 53. The arc-shaped friction plate frame 43 moves towards the outer wall of the buffer 2. In this process, the positioning plate frame 44 on the arc-shaped friction plate frame 43 enters the positioning frame 46, and the extension part 45 on the positioning plate frame 44 enters the positioning frame 46 through the inclined opening end of the positioning frame 46, and finally enters the clamping hole 47. At this time, the connection between the two arc-shaped friction plate frames 43 is fixed, and after the bottom hitting steel frame 42 contacts the ground, the two arc-shaped friction plate frames 43 are clamped under the circular steel plate 21 of the buffer 2, thereby slowing down or limiting the upward movement of the sliding part 4, that is, slowing down or limiting the upward movement of the sliding part 4 and the bottom hitting steel frame 42. It should be noted that the above-mentioned and the following load-bearing components in the present application are made of high-strength steel materials, such as the connecting shaft body 52, the arc-shaped friction plate frame 43, the positioning plate frame 44, the positioning frame 46, the extension part 45 and the like. The magnet 32 and the square magnet block 53 have a magnetic repulsion force much greater than the force of the extension part 45 clamped into the clamping hole 47 and the elastic force of the spring part 54.

[0037] In order to absorb the energy when the car body 1 overspeeds and hits the bottom, such as Figure 4 , Figures 10-14As shown, the hydraulic sleeve 6 filled with hydraulic oil is also fixedly installed inside the steel frame 3, and the sealing plate frame 61 (the hydraulic oil is filled in the cavity of the hydraulic sleeve 6 at the upper and lower positions of the sealing plate frame 61) is slidably connected with the inner wall of the hydraulic sleeve 6, the piston rod frame 62 is slidably connected with the inner wall of the hydraulic sleeve 6 and is installed on the sealing plate frame 61, and the end of the piston rod frame 62 penetrates through the hydraulic sleeve 6 and extends to the outside, the bumper 2 is located on the movement track of the piston rod frame 62, a plurality of damping holes 63 are arranged on the sealing plate frame 61, and the annular sleeve 64 (the annular sleeve 64 is limited to move axially relative to the sealing plate frame 61) is rotatably connected with the sealing plate frame 61, wherein a plurality of shielding plate frames 65 corresponding to the damping holes 63 are fixedly installed on the annular sleeve 64, the overlapping area of the shielding plate frame 65 and the damping hole 63 changes through the rotation of the annular sleeve 64, the stress shaft body 66 (the stress shaft body 66 is provided with a convex portion, and the inner circumferential wall of the annular sleeve 64 is provided with an axial groove matched with the convex portion) is axially slidably connected with the inner wall of the annular sleeve 64, the cavity 621 is formed in the piston rod frame 62, the spring mechanism 622 is installed on the inner wall of the cavity 621, and one end of the stress shaft body 66 is in contact with the spring mechanism 622, wherein the rolling ball 661 is movably connected with the inner wall of the stress shaft body 66, and the arc-shaped groove body 623 is further arranged on the inner wall of the cavity 621, the rolling ball 661 is limitedly slid in the arc-shaped groove body 623, and the conical stress plate frame 67 is fixedly installed at one end of the stress shaft body 66 located outside the annular sleeve 64, wherein the buffer spring 68 is connected between the end flange 624 of the piston rod frame 62 and the end outer wall of the hydraulic sleeve 6, the buffer spring 68 is in an elongated state at the beginning, is gradually compressed after the piston rod frame 62 driven by the steel frame 3 descends and contacts the bumper 2, restores the initial length after the piston rod frame 62 driven by the steel frame 3 rises, and makes the position of the sealing plate frame 61 in the hydraulic sleeve 6 descend.

[0038] The accompanying drawings are referred to in connection with the Figure 10 The accompanying drawings are referred to in connection with the Figure 14 As shown, when the bottom contact steel frame 42 moves to the ground, the end of the piston rod frame 62 located outside the hydraulic sleeve 6 will first contact the surface of the bumper 2, and as the car body 1 moves at a high speed and hits the bottom, the piston rod frame 62 will exert a force on the buffer area of the bumper 2, and in this process, the position of the sealing plate frame 61 in the hydraulic sleeve 6 will change, when the end of the piston rod frame 62 is not in contact with the bumper 2, the sealing plate frame 61 will be at the bottom of the hydraulic sleeve 6, and when the end of the piston rod frame 62 is in contact with the bumper 2, the sealing plate frame 61 will be at the position close to the top of the hydraulic sleeve 6, that is, the accompanying drawings are referred to in connection with the Figure 10In the changing process, the hydraulic oil flows through the damping hole 63 (the hydraulic oil flows from the cavity above the piston rod frame 62 in the hydraulic sleeve 6 to the cavity below), the greater the area of the damping hole 63, the smaller the hydraulic oil damping force that the sealing plate frame 61 receives during the position change inside the hydraulic sleeve 6, and the hydraulic sleeve 6 is further provided with a pressure relief valve at the top; in the process of the car body 1 overspeeding and hitting the bottom, the position of the sealing plate frame 61 changes inside the hydraulic sleeve 6, and if the speed is fast, the hydraulic oil will give the conical stress plate frame 67 a greater force (the pressure is greater than the spring force of the spring mechanism 622), so that the conical stress plate frame 67 drives the stress shaft body 66 to move downward relative to the sealing plate frame 61, that is, the stress shaft body 66 positions and slides in the annular sleeve 64, and the rolling ball 661 on the stress shaft body 66 moves along the arc-shaped groove 623, in this process, the stress shaft body 66 is pressed against the spring mechanism 622, and the rolling ball 661 moves along the arc-shaped groove 623, and the stress shaft body 66 rotates, since the stress shaft body 66 is in sliding connection with the annular sleeve 64, and further drives the shielding plate frame 65 to adjust the angle through the annular sleeve 64, that is, the overlapping area of the shielding plate frame 65 and the damping hole 63 changes, in the present application, when the conical stress plate frame 67 moves downward, the area leaked by the damping hole 63 increases, that is, the overlapping area of the shielding plate frame 65 and the damping hole 63 decreases, at this time, the sealing plate frame 61 is more easily moved inside the hydraulic sleeve 6, so as to avoid that the hydraulic sleeve 6 bears too much pressure when the car body 1 overspeeds and hits the bottom; further, in the present application, when the car body 1 descends at a faster speed, the sealing plate frame 61 inside the hydraulic sleeve 6 changes position faster when the piston rod frame 62 contacts the bumper 2, at this time, the hydraulic oil gives the conical stress plate frame 67 a greater force, the hydraulic oil pressure forces the stress shaft body 66, the annular sleeve 64 and the shielding plate frame 65 to rotate, so that the area leaked by the damping hole 63 increases accordingly, on the contrary, when the speed is slower, the area leaked by the damping hole 63 will not increase significantly, further, the area of the damping hole 63 in the present application is related to the descending speed of the car body 1, the faster the descending speed of the car body 1, the greater the oil permeation area of the damping hole 63 in order to reduce the pressure borne by the hydraulic sleeve 6, on the contrary, the damping hole 63 will not change, so that the structure design of the present application can effectively change the damping force that the sealing plate frame 61 receives inside the hydraulic sleeve 6 according to the descending speed of the car body 1; further, in the process of the car body 1 overspeeding and hitting the bottom, the bumper 2 can absorb part of the energy, and the piston rod frame 62 drives the sealing plate frame 61 to move to absorb the remaining energy, so as to absorb the energy of the car body 1 overspeeding and hitting the bottom.

[0039] In order to avoid the secondary collision, the hydraulic sleeve 6 is further provided with a supporting frame 7 on both sides, and the supporting frame 7 is further provided with a connecting sleeve 71, and the connecting sleeve 71 is internally provided with a supporting shaft 72 which is in sliding connection with the inner wall of the connecting sleeve 71, one end of the supporting shaft 72 is located outside the connecting sleeve 71, the other end of the supporting shaft 72 is connected with a spring body 73, and the one end of the supporting shaft 72 located outside the connecting sleeve 71 is embedded with a ball, the positioning steel plate 48 is fixedly installed on the sliding part 4, and a plurality of steel blocks 49 are fixedly installed on the positioning steel plate 48, and the steel blocks 49 are located on the movement track of the supporting shaft 72, and the cross section of the steel blocks 49 is a right trapezoidal shape;

[0040] Combining with the accompanying drawings Figure 7 and the accompanying drawings Figure 8 As shown in the drawings, when the steel frame 3 is driven to descend, if the bottom contact steel frame 42 is in contact with the ground, the supporting shaft 72 in the connecting sleeve 71 will first move along the inclined surface of the steel block 49 when the steel frame 3 is driven to descend by the supporting frame 7; when the buffer 2, the spring mechanism 622 and other elastic components release the absorbed energy to drive the car body 1 to ascend, the supporting shaft 72 will be in contact with the right angle surface of the steel block 49 when the steel frame 3 is driven to ascend by the supporting frame 7, at this time, the right angle surface of the steel block 49 will hinder the ascending movement of the supporting shaft 72, so as to hinder the ascending movement of the steel frame 3, that is, the ascending movement of the car body 1, thereby effectively preventing the secondary collision.

[0041] Specifically, in the process of the car body 1 overspeed bottoming, the steel frame 3 drives the sliding part 4 and the bottoming steel frame 42 and other components to move rapidly to the ground, and in this process, the piston rod frame 62 at the outer end of the hydraulic sleeve 6 is first in contact with the surface of the buffer 2, and under the action of the buffer 2 and the buffer spring 68, it can absorb part of the energy when the car body 1 bottoms out, and the sealing plate frame 61 at the end of the piston rod frame 62 changes its position inside the hydraulic sleeve 6, and in the process of change, the hydraulic oil gives a greater force to the conical stress plate frame 67, so that the conical stress plate frame 67 drives the stress shaft body 66 to move downward, that is, the stress shaft body 66 is positioned and slides in the annular sleeve 64, and the rolling ball 661 on the stress shaft body 66 moves along the arc-shaped groove 623, and in the process of moving along the arc-shaped groove 623, the stress shaft body 66 rotates, and then the stress shaft body 66 drives the shielding plate frame 65 to adjust the angle through the annular sleeve 64, and the area of the damping hole 63 leaking increases, that is, the overlapping area of the shielding plate frame 65 and the damping hole 63 decreases, at this time, the sealing plate frame 61 is more easily moved in the hydraulic sleeve 6, so as to avoid that the hydraulic sleeve 6 bears too much pressure when the car body 1 overspeed bottoms out, and then under the damping action of the hydraulic oil on the sealing plate frame 61, the energy when the car body 1 overspeed bottoms out can be effectively absorbed; after the elastic components such as the buffer 2 and the buffer spring 68 absorb the energy, the car body 1 moves upward through the energy released, and in the process of upward movement of the car body 1, the support shaft body 72 is in contact with the right-angle surface of the steel block 49, at this time, the right-angle surface of the steel block 49 hinders the upward movement of the support shaft body 72, so as to block the temporary upward movement of the steel frame 3, that is, to block the upward bouncing of the car body 1, so as to effectively prevent the occurrence of secondary collision.

[0042] It should be noted that in this document, the terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0043] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A shock-absorbing and buffering device for an elevator car, characterized in that, The system includes a steel frame (3) fixedly installed at the bottom of the car body (1) and directly above the buffer (2) located in the pit. Each steel frame (3) has a sliding part (4) installed on both sides, which is slidably connected to its inner wall. A constant force spring (41) is connected between the top of the sliding part (4) and the inner wall of the steel frame (3). A bottom-contact steel frame (42) is fixedly installed at the bottom of the sliding part (4). An arc-shaped friction plate frame (43) is provided on one side of each sliding part (4), and the arc-shaped friction plate frame (43) is connected to the sliding part (4) by a connector (5). When the bottom steel frame (42) contacts the ground, the arc-shaped friction plate frame (43) is in close contact with the surface of the buffer (2) under the action of the connector (5). The steel frame (3) is also fixedly installed with a hydraulic sleeve (6) containing hydraulic oil. The hydraulic sleeve (6) is installed with a sealing plate frame (61) that is slidably connected to its inner wall. The sealing plate frame (61) is installed with a piston rod frame (62) that is slidably connected to the inner wall of the hydraulic sleeve (6). The end of the piston rod frame (62) penetrates the hydraulic sleeve (6) and extends to the outside. The buffer (2) is located on the movement trajectory of the piston rod holder (62); the connecting part (5) includes a steel sleeve (51) fixedly installed inside the sliding part (4), and a connecting shaft (52) slidably connected to the inner wall of the steel sleeve (51). The end of the connecting shaft (52) is fixedly connected to the arc-shaped friction plate holder (43). A square magnet block (53) is also fixedly installed at one end of the connecting shaft (52) inside the steel sleeve (51), and a spring part (53) is connected between the square magnet block (53) and the inner wall of the steel sleeve (51). 4) Both sides of the steel frame (3) are fixedly installed with extension brackets (31), and magnets (32) are installed on the extension brackets (31). When the bottom steel frame (42) contacts the ground, the magnets (32) pass through the steel sleeve (51) during the descent of the extension brackets (31), and generate a repulsive force on the square magnet block (53) inside the steel sleeve (51), pushing the arc-shaped friction plate frame (43) on both sides closer to each other, so that the arc-shaped friction plate frame (43) on both sides is clamped under the upper circular steel plate of the buffer (2).

2. The shock-absorbing and buffering device for an elevator car according to claim 1, characterized in that: One of the arc-shaped friction plate frames (43) is symmetrically equipped with a positioning plate frame (44), and multiple telescopic parts (45) are installed on the positioning plate frame (44). Another arc-shaped friction plate frame (43) is also symmetrically equipped with a positioning frame (46), and a snap-fit ​​hole (47) is provided on the positioning frame (46) to allow the telescopic parts (45) to be snapped in.

3. The shock-absorbing and buffering device for an elevator car according to claim 2, characterized in that: The sealing plate frame (61) is provided with multiple damping holes (63), and an annular sleeve (64) that is rotatably connected to the sealing plate frame (61) but cannot move axially is installed on the sealing plate frame (61). Multiple shielding plate frames (65) that correspond one-to-one with the damping holes (63) are fixedly installed on the annular sleeve (64). The overlapping area of ​​the shielding plate frame (65) and the damping hole (63) changes due to the rotation of the annular sleeve (64).

4. The shock-absorbing and buffering device for an elevator car according to claim 3, characterized in that: The annular sleeve (64) has a force-bearing shaft (66) that is axially slidably connected to it. The piston rod holder (62) has a cavity (621) inside. A spring mechanism (622) is installed on the inner wall of the cavity (621). One end of the force-bearing shaft (66) is in contact with the spring mechanism (622). A ball (661) is also installed on the force-bearing shaft (66). An arc-shaped groove (623) is also provided on the inner wall of the cavity (621). The ball (661) is located in the arc-shaped groove (623) and is limited to slide.

5. The shock-absorbing and buffering device for an elevator car according to claim 4, characterized in that: A tapered force plate frame (67) is fixedly installed at one end of the force-bearing shaft (66) outside the annular sleeve (64), wherein a buffer spring (68) is connected between the flange (624) at the end of the piston rod frame (62) and the outer wall at the end of the hydraulic sleeve (6).

6. The shock-absorbing and buffering device for an elevator car according to claim 5, characterized in that: The hydraulic sleeve (6) is also fixedly installed with a support frame (7) on both sides, and a connecting sleeve (71) is fixedly installed inside the support frame (7). The connecting sleeve (71) is installed with a support shaft (72) that is slidably connected to its inner wall. One end of the support shaft (72) is located outside the connecting sleeve (71), and the other end of the support shaft (72) is connected to the inner wall of the connecting sleeve (71) with a spring body (73). A ball is embedded in the end of the support shaft (72) located outside the connecting sleeve (71).

7. The shock-absorbing and buffering device for an elevator car according to claim 6, characterized in that: A positioning steel plate (48) is fixedly installed on the sliding part (4), and multiple steel blocks (49) are fixedly installed on the positioning steel plate (48). The steel blocks (49) are located on the movement trajectory of the support shaft (72). The cross-section of the steel block (49) is a right trapezoid, with the inclined surface of the right trapezoid facing upward.

8. A shock-absorbing and buffering device for an elevator car according to claim 2, characterized in that: The opening end of the positioning frame (46) is set at an angle.

9. A method for operating a shock-absorbing and buffering device for an elevator car as described in any one of claims 7-8, characterized in that: During the high-speed bottoming process of the car body (1), the steel frame (3) will drive the sliding part (4) and the bottom-touching steel frame (42) to move rapidly towards the ground. The bottom-touching steel frame (42) will first contact the ground, and the ground will support the bottom-touching steel frame (42) to keep it stationary. As the car body (1) moves downward, the inner wall of the steel frame (3) will move towards the ground and compress the constant force spring (41). The magnet (32) on the extension bracket (31) will pass through the steel sleeve (51). The magnet (32) will generate a repulsive force on the square magnet block (53) inside the steel sleeve (51), so that the square magnet block (53) will drive the arc-shaped friction plate frame (43) towards the buffer (2) through the connecting shaft (52). During the movement, the spring part (54) is squeezed by the square magnet (53). As the arc-shaped friction plate frame (43) moves towards the outer wall of the buffer (2), the positioning plate frame (44) on the arc-shaped friction plate frame (43) will enter the positioning frame (46), and the telescopic part (45) on the positioning plate frame (44) will enter the interior of the positioning frame (46) along the inclined opening end, and finally enter the snap-fit ​​hole (47). At this time, the connection between the arc-shaped friction plate frames (43) on both sides is a fixed connection. After the bottom steel frame (42) contacts the ground, the arc-shaped friction plate frames (43) on both sides are clamped under the circular steel plate of the buffer (2), thereby slowing down the upward movement of the sliding part (4). Meanwhile, one end of the piston rod holder (62) located outside the hydraulic sleeve (6) contacts the surface of the buffer (2). Under the action of the buffer (2) and the buffer spring (68), it can absorb part of the energy when the car body (1) hits the bottom. At the same time, the position of the sealing plate holder (61) at the end of the piston rod holder (62) inside the hydraulic sleeve (6) will change. During the change, the hydraulic oil will give a large force to the conical force plate holder (67), so that the conical force plate holder (67) drives the force shaft (66) to move downward. That is, the force shaft (66) slides in the annular sleeve (64), and the ball (661) on the force shaft (66) will move along the arc groove (623). During the movement of the ball (661) along the arc groove (623), the force shaft (66) will rotate, and then the force shaft (66) passes through the annular sleeve (64). The angle of the shielding plate (65) is adjusted, and the area exposed by the damping hole (63) increases, that is, the overlapping area of ​​the shielding plate (65) and the damping hole (63) is reduced. At this time, the sealing plate (61) is easier to move in the hydraulic sleeve (6) to avoid the hydraulic sleeve (6) bearing too much pressure when the car body (1) overspeeds to the bottom. Then, under the damping effect of the hydraulic oil on the sealing plate (61), the energy of the car body (1) overspeeds to the bottom can be effectively absorbed. After absorbing the energy, the elastic components of the buffer (2) and buffer spring (68) release the energy to make the car body (1) move upward. During the upward movement of the car body (1), the support shaft (72) will contact the right angle surface of the steel block (49). At this time, the right angle surface of the steel block (49) will hinder the upward movement of the support shaft (72), thereby blocking the short-term upward movement of the steel frame (3).

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