Anti-impact elevator buffer

Abstract

The utility model discloses an anti-impact elevator buffer relates to elevator buffer technical field, including equipment box, the inner bottom wall of equipment box is fixedly connected with the support platform, the both sides of support platform are provided with first buffer subassembly, the one side of first buffer subassembly facing the support platform is equipped with fixed braking vane, and the first buffer subassembly is equipped with the fixed braking vane. A second buffering assembly is arranged at the top of the equipment box, an external expansion assembly is connected between the second buffering assembly and the supporting platform, and a hollow column casing and a second spring in the second buffering assembly firstly absorb the falling impact force of the elevator car to achieve the preliminary buffering effect; the piston and the first spring in the first buffer assembly further buffer to ensure that the elevator car slowly descends, and a multi-stage buffer mechanism enables the elevator car to gradually decelerate in the falling process instead of instantly stopping, so that the possible injury to passengers due to sudden stop is effectively reduced, and the safety of the passengers is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to elevator buffer technical field especially is involved in an anti -impact elevator buffer. BACKGROUND

[0002] In the process of elevator operation, if failure or emergency occurs, the elevator can quickly descend, at this time, the oil pressure buffer at the bottom of the elevator can effectively absorb and slow down the descending impact force of the elevator, avoid serious accidents caused by violent collision, protect the safety of passengers and equipment;

[0003] Chinese patent publication No. CN212403071U discloses an elevator car buffer, comprising a buffer cylinder, a reinforcing rib, a positioner and a side groove, the positioner is cross-shaped and is fixedly arranged at the bottom of the elevator shaft through a bolt, the bottom of the buffer cylinder is provided with a cross-shaped groove matched with the positioner, the buffer cylinder is matched and arranged on the positioner and is fixed with the bottom of the elevator shaft through a bolt, both ends of the side groove are provided with a pressing groove matched with the positioner, the positioner is used to position and install the buffer cylinder and the side groove during installation, which facilitates the installation and positioning of the reinforcing rib, the side groove is arranged in four directions and is provided with anti-vibration springs to convert kinetic energy, which can effectively reduce the stroke of the axial piston rod, and the buffer cylinder of the structure further adopts an inner and outer cylinder arrangement, in the impact process, hydraulic oil enters the gap cavity from the inner cylinder cavity through the oil hole, and the hydraulic oil is pressurized through the oil hole, which not only has the effect of shock absorption and energy absorption, but also converts kinetic energy into heat energy under the flow of hydraulic oil;

[0004] The above-mentioned technology mainly relies on hydraulic system and spring system for buffering, but the response speed of the hydraulic system is limited by the flow speed of the hydraulic oil and the oil circuit design, when the impact force suddenly increases, the hydraulic system may not be able to provide sufficient buffering effect instantly, the passengers feel obvious vibration, which may even cause injury, therefore, the utility model discloses an anti-impact elevator buffer for solving the above-mentioned problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an anti-impact elevator buffer to solve the technical problem that the response speed of the hydraulic system of the traditional buffer is limited by the flow speed of the hydraulic oil and the oil circuit design, when the impact force suddenly increases, the hydraulic system may not be able to provide sufficient buffering effect instantly, the passengers feel obvious vibration, which may even cause injury.

[0006] To achieve the above-mentioned purpose, the utility model solves the above-mentioned technical problem by the following scheme:

[0007] The utility model provides an anti -impact elevator buffer, including the equipment box, the inner bottom wall of equipment box is fixedly connected with the support platform, both sides of support platform all are provided with first buffer subassembly, the side of first buffer subassembly towards support platform all is installed with fixed brake plate, the top of equipment box is provided with second buffer subassembly, the outside expansion subassembly is connected between second buffer subassembly and support platform, wherein, the outside expansion subassembly installs two variable interval movable brake plate, movable brake plate all with adjacent fixed brake plate contact.

[0008] As a further scheme of the utility model, the first buffer assembly comprises two first buffer cylinders fixed on the upper and lower inner walls of the equipment box, respectively, a piston is slidably arranged in the first buffer cylinder, a first spring is arranged between the piston and the top wall of the first buffer cylinder, a guide rod is fixed to the lower side of the piston, the guide rod penetrates through the first buffer cylinder and is fixedly connected with a first fork, the first fork is hingedly connected with a diagonal rod, the diagonal rod is hingedly connected with the same second fork at the end away from the first fork, the second fork is fixedly connected with a guide rail box, both ends of the guide rail box are slidably connected with slide rails, and the upper and lower inner walls of the equipment box are fixedly connected with the two slide rails, respectively.

[0009] As a further scheme of the utility model, one side of the fixed brake plate is fixedly embedded with two first screws, one end of the first screw is threadedly connected with a first nut penetrating through the guide rail box, and the fixed brake plate is matched with the internal structure of the guide rail box.

[0010] As a further scheme of the utility model, the second buffer assembly comprises a second buffer cylinder fixedly embedded on the top of the equipment box, a vertical rod is slidably embedded in the middle of the bottom wall of the second buffer cylinder, and a hollow cylinder is slidably embedded in the middle of the top wall of the second buffer cylinder, wherein the top wall of the hollow cylinder is fixedly connected with the top end of the vertical rod.

[0011] As a further scheme of the utility model, a second spring is sleeved on the outer side of the vertical rod and between the inner bottom wall of the second buffer cylinder and the hollow cylinder, and the bottom end of the vertical rod penetrates through the second buffer cylinder.

[0012] As a further scheme of the utility model, the outside expansion subassembly comprises an upper supporting plate fixedly connected with the bottom end of the vertical rod and a lower supporting plate fixedly connected with the upper side of the support platform, both ends of the upper supporting plate and the lower supporting plate are fixedly connected with a third fork, the third fork is hingedly connected with an outside expansion rod, adjacent outside expansion rods are hingedly connected with the same fourth fork, and the fourth fork is fixedly connected with an assembly plate.

[0013] As a further scheme of the utility model, one side of the movable brake plate is fixedly embedded with two second screws, one end of the second screw is threadedly connected with a second nut penetrating through the assembly plate.

[0014] Compared with the prior art, the utility model has the advantages of

[0015] 1. The utility model relates to an anti-impact elevator buffer, hollow cylinder and second spring in second buffer assembly first absorb the impact force of elevator car down, play the role of preliminary buffering, subsequently, piston and first spring in first buffer assembly further buffer, ensure elevator car speed slow decline, multistage buffering mechanism makes elevator car gradually slow down in the down process, instead of instantaneous stop, thereby effectively reduce the harm that passenger can receive because of emergency stop, guarantee the safety of passenger,

[0016] 2. The utility model relates to an anti-impact elevator buffer, movable brake plate and fixed brake plate between friction contact, can produce braking force when elevator car down, reduce car speed, and along with movable brake plate's downshift and interval increase, gradually increase friction, and the braking effect is stronger, make elevator car's deceleration process more smooth, avoid the emergency stop phenomenon caused by instantaneous high braking force. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model is further explained in connection with the drawings and examples:

[0018] Figure 1 It is the appearance view of the utility model of an anti-impact elevator buffer,

[0019] Figure 2 It is the sectional view of the utility model of an anti-impact elevator buffer,

[0020] Figure 3 It is the structure enlarged view of A place in the utility model of an anti-impact elevator buffer, Figure 2

[0021] Figure 4 It is the structure enlarged view of B place in the utility model of an anti-impact elevator buffer, Figure 2

[0022] Figure 5 It is the combination view of vertical pole, hollow cylinder in the utility model of an anti-impact elevator buffer,

[0023] Figure 6 It is the structure split diagram of guide rail box, fixed brake plate in the utility model of an anti-impact elevator buffer.

[0024] ​​In the drawings, the components represented by each reference numeral are listed as follows: 1, equipment box; 11, supporting platform; 2, first buffer assembly; 3, fixed brake plate; 4, second buffer assembly; 5, outward expansion assembly; 6, movable brake plate; 21, first buffer cylinder; 22, piston; 23, first spring; 24, first clamping fork; 25, inclined rod; 26, second clamping fork; 27, guide rail box; 28, sliding rail; 29, guide rod; 31, first screw rod; 32, first nut; 41, second buffer cylinder; 42, vertical rod; 43, hollow cylinder; 44, second spring; 51, upper supporting plate; 52, lower supporting plate; 53, third clamping fork; 54, outward expansion rod; 55, fourth clamping fork; 56, assembly plate; 61, second screw rod; 62, second nut. DETAILED DESCRIPTION

[0025] The utility model is further described below in combination with the embodiments.

[0026] Please refer to Figures 1-6 The utility model provides an anti-impact elevator buffer which comprises an equipment box 1, a supporting platform 11 is fixedly connected to the inner bottom wall of the equipment box 1.

[0027] Specifically, a maintenance opening can be arranged at the side of the equipment box 1 to facilitate the maintenance of the inside of the equipment box 1.

[0028] Further, the two sides of the supporting platform 11 are provided with first buffer assemblies 2, the first buffer assembly 2 comprises two first buffer cylinders 21 fixed to the upper and lower inner walls of the equipment box 1 respectively, a piston 22 is slidably arranged in the first buffer cylinder 21, a first spring 23 is arranged between the piston 22 and the top wall of the first buffer cylinder 21, a guide rod 29 is fixed to the lower side of the piston 22, the guide rod 29 penetrates through the first buffer cylinder 21 and is fixedly connected with a first clamping fork 24, the first clamping fork 24 is hingedly connected with an inclined rod 25, the end of the inclined rod 25 away from the first clamping fork 24 is hingedly connected with a same second clamping fork 26, the second clamping fork 26 is fixedly connected with a guide rail box 27, the two ends of the guide rail box 27 are slidably connected with sliding rails 28, and the two sliding rails 28 are fixedly connected with the upper and lower inner walls of the equipment box 1 respectively.

[0029] Specifically, when the elevator car falls, the impact force is first transmitted to the movable brake plate 6 through the expansion assembly 5, and then to the fixed brake plate 3, and the fixed brake plate 3 and the guide rail box 27 transmit the force to the first fork 24 through the movement of the second fork 26 and the inclined rod 25, and the first fork 24 transmits the force to the piston 22 through the guide rod 29, and the piston 22 slides in the first buffer cylinder 21, compresses the first spring 23, absorbs the impact force through the elastic deformation of the first spring 23, and plays a buffering role. It is worth noting that as the piston 22 moves, the deformation amount of the first spring 23 gradually increases, and according to Hooke's Law, the spring force is proportional to the deformation amount, that is, F=kx, where F is the spring force, k is the stiffness coefficient of the spring, and x is the deformation amount. Therefore, the spring force of the first spring 23 increases linearly with the increase of the deformation amount, which helps to gradually increase the friction between the fixed brake plate 3 and the movable brake plate 6.

[0030] Further, the first buffer assembly 2 is mounted with a fixed brake plate 3 on one side of the support platform 11, one side of the fixed brake plate 3 is fixedly embedded with two first screws 31, one end of the first screw 31 is threadedly connected with a first nut 32 penetrating through the guide rail box 27, and the fixed brake plate 3 is matched with the internal structure of the guide rail box 27.

[0031] Specifically, the fixed brake plate 3 is matched with the internal structure of the guide rail box 27 to ensure the accuracy and stability of the installation position, the combination of the first screw 31 and the first nut 32 ensures the stable connection between the fixed brake plate 3 and the guide rail box 27, avoids loosening during elevator operation, facilitates the installation and replacement of the fixed brake plate 3, and avoids excessive wear and failure of the fixed brake plate 3.

[0032] Further, the top of the equipment box 1 is provided with a second buffer assembly 4, the second buffer assembly 4 comprises a second buffer cylinder 41 fixedly embedded on the top of the equipment box 1, a vertical rod 42 slidingly embedded in the middle of the bottom wall of the second buffer cylinder 41, and a hollow cylinder 43 slidingly embedded in the middle of the top wall of the second buffer cylinder 41, the top wall of the hollow cylinder 43 is fixedly connected with the top end of the vertical rod 42.

[0033] Specifically, the second buffer cylinder 41 is fixed with the equipment box 1, the top wall of the hollow cylinder 43 is slidingly connected with the top wall of the second buffer cylinder 41, and the bottom wall of the second buffer cylinder 41 is slidingly connected with the vertical rod 42, thereby providing guiding and restraining effects for the vertical rod 42 and the hollow cylinder 43.

[0034] Further, a second spring 44 is sleeved outside the vertical rod 42 and between the bottom wall of the second buffer cylinder 41 and the hollow cylinder 43, and the bottom end of the vertical rod 42 penetrates out of the second buffer cylinder 41.

[0035] Specifically, when the elevator car falls, the hollow cylinder 43 first contacts the car, moves downward under the impact force, and compresses the second spring 44. The second spring 44 absorbs the impact force through elastic deformation, playing a role in preliminary buffering, and at the same time, the vertical rod 42 further transmits the impact force from the hollow cylinder 43 to the outward expansion assembly 5, triggering the subsequent buffering mechanism.

[0036] Further, the second buffering assembly 4 is connected with the support platform 11 through an outward expansion assembly 5, the outward expansion assembly 5 includes an upper supporting plate 51 fixedly connected to the bottom end of the vertical rod 42, and a lower supporting plate 52 fixedly connected to the upper side of the support platform 11. The two ends of the upper supporting plate 51 and the lower supporting plate 52 are both fixedly connected with a third clamping fork 53. The third clamping fork 53 is hingedly connected with an outward expansion rod 54, and adjacent outward expansion rods 54 are hingedly connected with the same fourth clamping fork 55. The fourth clamping fork 55 is fixedly connected with an assembly plate 56.

[0037] Specifically, the four outward expansion rods 54 together form a "diamond" shape. When the vertical rod 42 moves downward, the upper supporting plate 51 descends, driving the third clamping fork 53 and the outward expansion rod 54 to move. The movement of the outward expansion rod 54 causes the angle between adjacent outward expansion rods 54 to decrease, thereby pushing the assembly plate 56 to expand outward. The expansion of the assembly plate 56 drives the movable brake plate 6 to move outward, causing it to contact the fixed brake plate 3 and generate friction, thereby achieving the effect of buffering and deceleration.

[0038] Further, two movable brake plates 6 with variable spacing are installed on the outward expansion assembly 5. One side of the movable brake plate 6 is fixedly embedded with two second screws 61. One end of the second screw 61 is threadedly connected with a second nut 62.

[0039] Specifically, after passing the second screw 61 through the assembly plate 56, the movable brake plate 6 is fixed by threadedly cooperating the second nut 62 and the second screw 61. This can realize the assembly of the movable brake plate 6 and the assembly plate 56, facilitate the installation and replacement of the movable brake plate 6, and avoid excessive wear and failure of the movable brake plate 6.

[0040] Further, the movable brake plate 6 is in contact with the adjacent fixed brake plate 3.

[0041] Specifically, the movable brake plate 6 gradually contacts the fixed brake plate 3 and generates friction, avoiding sudden stop. It is worth noting that the movable brake plate 6 and the fixed brake plate 3 are made of the same material as the brake pad, such as metal matrix composite material, ceramic matrix composite material, carbon fiber reinforced material, etc., to ensure the friction resistance and high temperature resistance.

[0042] Working principle:

[0043] In use, after the hollow cylinder 43 is in contact with the falling elevator car, the second spring 44 is compressed, the second spring 44 is gradually compressed and deformed, and the impact force of the elevator car can be buffered. At the same time, the hollow cylinder 43 pushes the vertical rod 42 to move downward, the vertical rod 42 pushes the upper supporting plate 51 to move downward, the spacing between the upper supporting plate 51 and the lower supporting plate 52 is reduced, as the spacing between the upper supporting plate 51 and the lower supporting plate 52 is reduced, the included angle between the adjacent outer expansion rods 54 is gradually reduced, the spacing between the two assembly plates 56 is increased, the movable brake plate 6 is in frictional contact with the fixed brake plate 3 in the process of moving downward, and the impact force is released. Moreover, as the spacing between the movable brake plate 6 is increased, the guide rail box 27 can be pushed to slide along the slide rail 28, the movement of the guide rail box 27 changes the inclination angle of the inclined rod 25, the inclined rod 25 can push the guide rod 29 to retract into the first buffer cylinder 21, the piston 22 gradually compresses the first spring 23, as the rigidity of the first spring 23 is gradually increased, the frictional force between the movable brake plate 6 and the fixed brake plate 3 is gradually increased, the speed of the elevator car can be slowly reduced, and the elevator car cannot be suddenly stopped, so that the safety of passengers in the elevator is ensured.

Claims

1. An impact-resistant elevator buffer comprising a device housing (1), characterized in that, The inner bottom wall of the equipment box (1) is fixedly connected with a supporting platform (11), both sides of the supporting platform (11) are provided with first buffer assemblies (2), one side of each of the first buffer assemblies (2) is provided with a fixed brake plate (3), the top of the equipment box (1) is provided with a second buffer assembly (4), and the second buffer assembly (4) is connected with the supporting platform (11) through an outward expansion assembly (5), wherein two movable brake plates (6) with variable spacing are arranged on the outward expansion assembly (5), and each movable brake plate (6) is in contact with an adjacent fixed brake plate (3).

2. An impact-resistant elevator bumper according to claim 1, characterized in that: The first buffer assembly (2) comprises two first buffer cylinders (21) fixed on the upper and lower inner walls of the equipment box (1), respectively, a piston (22) is slidably arranged in the first buffer cylinder (21), a first spring (23) is arranged between the piston (22) and the top wall of the first buffer cylinder (21), a guide rod (29) is fixed to the lower side of the piston (22), the guide rod (29) penetrates through the first buffer cylinder (21) and is fixedly connected with a first fork (24), the first fork (24) is hingedly connected with a diagonal rod (25), one end of the diagonal rod (25) away from the first fork (24) is hingedly connected with a same second fork (26), the second fork (26) is fixedly connected with a guide rail box (27), and both ends of the guide rail box (27) are slidably connected with slide rails (28), and the slide rails (28) are fixedly connected with the upper and lower inner walls of the equipment box (1), respectively.

3. An impact-resistant elevator bumper according to claim 2, characterized in that: One side of the fixed brake plate (3) is fixedly provided with two first screws (31), one end of the first screw (31) is threadedly connected with a first nut (32) penetrating through the guide rail box (27), and the fixed brake plate (3) is matched with the internal structure of the guide rail box (27).

4. An impact-resistant elevator bumper according to claim 1, characterized in that: The second buffer assembly (4) comprises a second buffer cylinder (41) fixedly arranged on the top of the equipment box (1), a vertical rod (42) is slidably arranged in the middle of the bottom wall of the second buffer cylinder (41), and a hollow cylinder (43) is slidably arranged in the middle of the top wall of the second buffer cylinder (41), wherein the top wall of the hollow cylinder (43) is fixedly connected with the top end of the vertical rod (42).

5. An impact-resistant elevator bumper according to claim 4, characterized in that: A second spring (44) is sleeved outside the vertical rod (42) and between the inner bottom wall of the second buffer cylinder (41) and the hollow cylinder (43), and the bottom end of the vertical rod (42) penetrates out of the second buffer cylinder (41).

6. An impact-resistant elevator bumper according to claim 4, characterized in that: The outward expansion assembly (5) comprises an upper supporting plate (51) fixedly connected with the bottom end of the vertical rod (42) and a lower supporting plate (52) fixedly connected with the upper side of the supporting platform (11), both ends of the upper supporting plate (51) and the lower supporting plate (52) are fixedly connected with third forks (53), the third forks (53) are hingedly connected with outward expansion rods (54), adjacent outward expansion rods (54) are hingedly connected with a same fourth fork (55), and the fourth fork (55) is fixedly connected with an assembly plate (56).

7. An impact-resistant elevator bumper according to claim 6, characterized in that: One side of the movable brake plate (6) is fixedly embedded with two second screw rods (61), one end of each of the second screw rods (61) is threadedly connected with a second nut (62) penetrating through the assembling plate (56).

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