Elevator safety protection buffer

Abstract

The invention discloses an elevator safety protection buffer which comprises a fixing base, a spring hydraulic shock absorber is arranged in the center of the fixing base, spring lifting shock absorbers are arranged on the periphery of the fixing base, a transverse buffer is further arranged between the spring hydraulic shock absorber and the spring lifting shock absorbers, and each spring lifting shock absorber comprises a fixing cylinder, a lifting cylinder, a first spring and an ejector rod. The ejector rod is arranged in the lifting cylinder and extends out, a first spring is arranged between the ejector rod and the lifting cylinder, the lifting cylinder can ascend and descend along with the action of the transverse buffer, and the transverse buffer comprises a connecting rod, a sliding plate, a transverse rack and a second spring. The second spring is arranged between the sliding plate and the fixing cylinder. Multi-stage buffering is formed through the springs and hydraulic pressure, and the buffering effect is improved.

Description

Technical Field

[0001] The invention relates to an elevator safety protection buffer and belongs to the technical field of elevator safety. Background Art

[0002] The buffer is an elevator safety device that provides the last kind of safety protection. It is installed in the elevator shaft pit, directly below the car and counterweight. When the elevator moves upward or downward, due to wire rope breakage, traction friction, insufficient brake force or control system failure, the buffer will act as a buffer to prevent the elevator car or counterweight from directly hitting the bottom or top, protecting the safety of passengers and equipment.

[0003] At present, there are two main types of buffers for elevators: energy storage type and energy consumption type. The buffer materials used in the two are different. The energy storage type buffer mainly uses springs and polyurethane materials as buffer elements, while the energy consumption type buffer is mainly an oil pressure buffer. The buffering force of the spring buffer changes linearly. When the car or counterweight hits the buffer, the buffering force is small at the beginning. As the spring is compressed, the buffering force gradually increases, which will cause the car or counterweight to decelerate unsteadily. The deceleration is too slow at the beginning of the impact, and the buffering force may be too large in the later stage, causing a large impact. The response speed of the oil pressure buffer is relatively slow. Summary of the invention

[0004] In view of the above-mentioned defects in the prior art, the task of the present invention is to provide an elevator safety protection buffer to solve the problems of insufficient buffering stability and slow response speed.

[0005] The technical solution of the present invention is as follows: an elevator safety protection buffer, comprising a fixed seat, a spring hydraulic shock absorber is arranged in the center of the fixed seat, a spring lifting shock absorber is arranged on the fixed seat around the spring hydraulic shock absorber, a transverse buffer is arranged between the spring lifting shock absorber and the spring hydraulic shock absorber, and the top height of the spring hydraulic shock absorber is higher than the top height of the spring lifting shock absorber;

[0006] The spring lift shock absorber comprises

[0007] The lateral buffer includes a connecting rod, a slide plate and a second spring. The connecting rod is connected between the slide plate and the top telescopic end of the spring hydraulic shock absorber. When the top telescopic end of the spring hydraulic shock absorber is raised or lowered, the slide plate is driven to move laterally on the fixed seat. The second spring is laterally arranged between the slide plate and the fixed cylinder.

[0008] Furthermore, the lateral buffer includes a lateral rack connected to the slide plate, the spring lifting shock absorber includes a threaded drive, the threaded drive cylinder is rotatably arranged in the fixed cylinder, the threaded drive cylinder and the lifting cylinder thread cooperate to form a screw nut movement mechanism, and the threaded drive cylinder is provided with a gear meshing with the lateral rack.

[0009] Furthermore, a torsion spring is provided between the fixing cylinder and the threaded driving cylinder.

[0010] Furthermore, a limiting plate is provided on one side of the lifting cylinder, a guide groove is provided on the side wall of the fixing cylinder, and the limiting plate is arranged in the guide groove.

[0011] Furthermore, the transverse buffer includes a guide rod connected to the slide plate, one end of the guide rod crosses the fixed tube, and the second spring is sleeved on the guide rod.

[0012] Furthermore, a slide rail is provided on the base between the spring hydraulic shock absorber and the fixed cylinder, and the slide plate is slidably arranged on the slide rail.

[0013] Furthermore, the spring lifting shock absorbers are equally distributed along the circumference around the spring hydraulic shock absorber.

[0014] Furthermore, the number of the spring lift shock absorbers is no less than three.

[0015] Furthermore, the spring hydraulic shock absorber includes a hydraulic cylinder, a piston, a piston rod and a third spring. The piston is arranged in the hydraulic cylinder, the piston rod is fixedly connected to the piston, the top of the piston rod is the top telescopic end of the spring hydraulic shock absorber, and the third spring is arranged between the top of the piston rod and the hydraulic cylinder.

[0016] Furthermore, an anti-collision rubber block is provided on the top of the piston rod.

[0017] The advantages of the present invention compared with the prior art are:

[0018] When the elevator car hits the bottom, the spring hydraulic shock absorber and the transverse buffer first perform buffering, and after the top end of the spring hydraulic shock absorber drops to a certain height, the top end of the spring lifting shock absorber rises and contacts the bottom of the car, and then the spring hydraulic shock absorber, the transverse buffer and the spring lifting shock absorber jointly perform buffering, which constitutes a multi-stage buffer structure that acts in sequence as a whole, and can effectively reduce the impact force of the elevator car hitting the bottom.

[0019] The buffer of the present invention utilizes the impact force of the car to perform multi-stage buffering. The spring hydraulic shock absorber, the lateral buffer, and the spring lifting shock absorber combine the two buffering forms of hydraulic energy-consuming buffering and spring elastic buffering, and have sequential actions, which effectively change the linear problem of spring buffering and can achieve the purpose of rapid response, effectively improving the buffering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the elevator safety protection buffer according to the embodiment.

[0021] Figure 2 It is a cross-sectional schematic diagram of an elevator safety protection buffer according to an embodiment.

[0022] Figure 3 An exploded view of an elevator safety protection buffer according to an embodiment.

[0023] Figure 4 It is a schematic diagram of the structure of the spring hydraulic shock absorber.

[0024] Figure 5 This is an exploded view of the spring hydraulic shock absorber.

[0025] Figure 6 It is a schematic diagram of the coordination structure of the lateral buffer and the spring lifting shock absorber.

[0026] Figure 7 An exploded view of the lateral buffer and spring lift shock absorber.

[0027] Figure 8 An internal diagram of the lateral buffer and spring lift shock absorber.

[0028] Fig. 9 This is a structural diagram of the lifting cylinder and top rod of the spring lifting shock absorber. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the embodiments, but are not intended to limit the present invention.

[0030] Please combine Figure 1As shown, the elevator safety protection buffer involved in this embodiment includes a fixed seat 1, a spring hydraulic shock absorber 2 is arranged in the center of the top surface of the fixed seat 1, three spring lifting shock absorbers 3 are equally distributed around the spring hydraulic shock absorber 2 along the circumferential direction, and a transverse buffer 4 is connected between the spring hydraulic shock absorber 2 and each spring lifting shock absorber 3. By installing the fixed seat 1 in the bottom pit of the hoistway, the spring hydraulic shock absorber 2 and the multiple spring lifting shock absorbers 3 correspond to the elevator car. When the car hits the bottom, the bottom of the car first contacts the spring hydraulic shock absorber 2, and the spring hydraulic shock absorber 2 performs a primary buffering on the car. During the primary buffering process, the spring hydraulic shock absorber 2 performs a secondary buffering through the action of the transverse buffer 4, and at the same time, the transverse buffer 4 drives the top of the spring lifting shock absorber 3 to rise, and then contacts the bottom of the elevator car to produce a third-level buffering effect on the car. It should be pointed out that the number of spring lifting shock absorbers 3 is not limited to 3, and generally 3-5 can be selected.

[0031] Please refer to the specific structure Figures 2 to 5 As shown, the spring hydraulic shock absorber 2 includes a hydraulic cylinder 201, a piston 202, a piston rod 203 and a third spring 204. The hydraulic cylinder 201 is fixedly connected to the top of the fixing seat 1, and the piston rod 203 is fixedly connected to the top of the piston 202. The piston 202 is placed in the hydraulic cylinder 201. The piston rod 203 can move up and down in the hydraulic cylinder 201 driven by the piston 202, and the top of the piston rod 203 extends from the upper part of the hydraulic cylinder 201. The top of the piston rod 203 constitutes the top telescopic end of the spring hydraulic shock absorber 2. The third spring 204 is sleeved on the piston rod 203 and is located outside the hydraulic cylinder 201, that is, the bottom of the third spring 204 is arranged on the top surface of the hydraulic cylinder 201, and the top of the third spring 204 is located below the top of the piston rod 203. The top of the piston rod 203 is provided with a connecting piece 205 for connecting with the transverse buffer 4. The top of the piston rod 203 is provided with an anti-collision rubber block 206.

[0032] Hydraulic oil is injected into the hydraulic cylinder 201. When the car hits the bottom, it contacts the anti-collision rubber block 206. The anti-collision rubber block 206 prevents the car from hitting the bottom and causing damage to the spring hydraulic shock absorber 2. At the same time, the anti-collision rubber block 206 has a certain elasticity and can also play a buffering effect on the car hitting the bottom. The impact of the car causes the piston 202 to move downward in the hydraulic cylinder 201, and the oil pressure under the piston is used for buffering. At the same time, as the piston rod 203 moves downward, the third spring 204 is squeezed and provides buffering elastic force. When the car is reset, the third spring 204 resets the spring hydraulic shock absorber 2 as a whole through its own elastic force.

[0033] Please further combine Figure 2 , Figure 3 as well as Figures 6 to 9As shown, the transverse buffer 4 includes a connecting rod 401, a slide plate 402, a second spring 403, a guide rod 404 and a transverse rack 405. A plurality of slide rails 101 are arranged on the top surface of the fixed seat 1 between the spring hydraulic shock absorber 2 and the spring lifting shock absorber 3, and the slide plate 402 cooperates with the slide rails 101 to move on the fixed seat 1 to maintain good stability.

[0034] One end of the connecting rod 401 is hinged to the connecting piece 205 at the top of the piston rod 203 of the spring hydraulic shock absorber 2, and the other end of the connecting rod 401 is hinged to the slide plate 402. When the piston rod 203 moves up and down, the slide plate 402 will be driven to slide horizontally on the slide rail 101 through the connecting rod 401. The slide plate 402 is respectively fixedly mounted with a guide rod 404 and a transverse rack 405. The guide rod 404 and the transverse rack 405 are both arranged horizontally, wherein one end of the guide rod 404 is fixedly connected to the slide plate 402, and the other end of the guide rod 404 crosses the spring lifting shock absorber 3. When the transverse buffer 4 moves horizontally, it is guided by the guide rod. At the same time, the second spring 403 is sleeved on the guide rod 404 and is located between the slide plate 402 and the spring lifting shock absorber 3. When the slide plate 402 approaches the spring lifting shock absorber 3, the second spring 403 will be compressed. One end of the transverse rack 405 is fixedly connected to the slide plate 402, and the other end of the transverse rack 405 is arranged on the spring lifting shock absorber 3 to drive the spring lifting shock absorber 3 to lift. For details, see the detailed description of the structure of the spring lifting shock absorber 3.

[0035] When the elevator car impacts the spring hydraulic shock absorber 2, the top of the piston rod 203 moves downward to push the slide plate 402 to slide through the connecting rod 401. The slide plate 402 moves along the slide rail 101 under the guidance of the guide rod 404, and the slide plate 402 squeezes the second spring 403, thereby performing secondary buffering to reduce the impact force of the elevator car.

[0036] The spring lifting shock absorber 3 includes a fixed cylinder 301, a threaded driving cylinder 302, a lifting cylinder 303, a first spring 304 and a push rod 305. The fixed cylinder 301 is fixedly arranged on the fixed seat 1. One end of the second spring 403 in the transverse buffer 4 abuts against the outer wall of the fixed cylinder 301. Two openings are arranged on the fixed cylinder 301, one of which is used to pass the guide rod 404, and the other is used to pass the transverse rack 405.

[0037] The threaded drive cylinder 302 is rotatably arranged in the fixed cylinder 301, and the threaded drive cylinder 302 is driven to rotate by the transverse rack 405. Specifically, a driving gear 306 is fixedly installed at the bottom of the threaded drive cylinder 302, and the driving gear 306 is meshed with the transverse rack 405. When the transverse rack 405 moves laterally, the driving gear 306 drives the threaded drive cylinder 302 to rotate in the fixed cylinder 301. The threaded drive cylinder 302 is provided with an internal thread, and the lifting cylinder 303 is arranged in the threaded drive cylinder 302 and is provided with an external thread, so that the lifting cylinder 303 and the threaded drive cylinder 302 are threadedly matched to form a screw nut movement mechanism. A guide groove is provided on the side wall of the fixed cylinder 301, and a limit plate 307 is installed on one side of the lifting cylinder 303. The limit plate 307 is arranged in the guide groove to prevent the lifting cylinder 303 from rotating. In order to enhance the buffering effect when the threaded drive cylinder 302 rotates, a torsion spring 308 is provided between the fixed cylinder 301 and the threaded drive cylinder 302, and the two ends of the torsion spring 308 are respectively connected to the inner wall of the fixed cylinder 301 and the outer wall of the threaded drive cylinder 302. When the threaded drive cylinder 302 rotates, the elastic force generated by the torsion spring 308 further reduces the impact force on the elevator car. The top rod 305 is slidably inserted into the lifting cylinder 303, and the top head 309 of the top rod 305 extends from the top of the lifting cylinder 303 to contact the car. The first spring 304 is arranged between the lifting cylinder 303 and the top rod 305, and is located at the bottom of the top rod 305.

[0038] When the threaded driving cylinder 302 rotates to reduce the impact force of the elevator car, the lifting cylinder 303 is driven to move upward, and the lifting cylinder 303 drives the top rod 305 to move upward, so that the top head 309 of the top rod 305 contacts the bottom of the car. The descent of the car will further move the lifting cylinder 303 upward through the aforementioned buffer mechanisms, and then quickly compress the first spring 304 to further buffer the elevator car.

[0039] The overall working process of the elevator safety protection buffer is as follows: when the car hits the bottom, the bottom of the car first contacts the anti-collision rubber block 206, the piston rod 203 moves downward to drive the piston 202 to slide in the hydraulic cylinder 201, and the hydraulic oil in the hydraulic cylinder 201 is used for oil pressure buffering to achieve the first-level buffering of the car. During the first-level buffering process, the piston rod 203 moves downward to make the connecting rods 401 of the multiple transverse buffers 4 extend outward, pushing the slide plate 402 to slide, and the movement of the slide plate 402 compresses the second spring 403 to reduce the impact force of the elevator car, thereby achieving the second-level buffering. At the same time, the slide plate 402 drives the transverse rack 405 to move while moving, driving the threaded drive cylinder 302 to rotate and causing the torsion spring 308 to rotate to generate elastic force, further reducing the impact force on the elevator car. At the same time, the threaded drive cylinder 302 drives the lifting cylinder 303 to move upward, so that the top 309 of the top rod 305 contacts the bottom of the car, and the elevator car is buffered at the third level. Therefore, the combined effect of multiple different springs and hydraulic oil is utilized to realize a sequential buffering effect, which can respond quickly while avoiding linear buffering problems and improving the buffering effect.

Claims

1. An elevator safety protection buffer, comprising a fixed seat, wherein a spring hydraulic shock absorber is provided in the center of the fixed seat, characterized in that: A spring lifting shock absorber is arranged on the fixing seat around the spring hydraulic shock absorber, a transverse buffer is arranged between the spring lifting shock absorber and the spring hydraulic shock absorber, and the top height of the spring hydraulic shock absorber is higher than the top height of the spring lifting shock absorber; The spring lifting shock absorber comprises a fixed cylinder, a lifting cylinder, a first spring and a push rod, wherein the push rod is arranged in the lifting cylinder and extends from the top of the lifting cylinder, the first spring is arranged between the push rod and the lifting cylinder, and the lifting cylinder is arranged in the fixed cylinder and rises and falls when the lateral buffer is actuated; The lateral buffer includes a connecting rod, a slide plate and a second spring. The connecting rod is connected between the slide plate and the top telescopic end of the spring hydraulic shock absorber. When the top telescopic end of the spring hydraulic shock absorber is raised or lowered, the slide plate is driven to move laterally on the fixed seat. The second spring is laterally arranged between the slide plate and the fixed cylinder.

2. The elevator safety protection buffer according to claim 1, characterized in that: The transverse buffer includes a transverse rack connected to the slide plate, and the spring lifting shock absorber includes a threaded drive. The threaded drive cylinder is rotatably arranged in the fixed cylinder. The threaded drive cylinder and the lifting cylinder thread cooperate to form a screw nut movement mechanism. The threaded drive cylinder is provided with a gear meshing with the transverse rack.

3. The elevator safety protection buffer according to claim 2, characterized in that: A torsion spring is provided between the fixing cylinder and the threaded driving cylinder.

4. The elevator safety protection buffer according to claim 2, characterized in that: A limiting plate is provided on one side of the lifting cylinder, a guide groove is provided on the side wall of the fixing cylinder, and the limiting plate is arranged in the guide groove.

5. The elevator safety protection buffer according to claim 1, characterized in that: The transverse buffer comprises a guide rod connected to the slide plate, one end of the guide rod crosses the fixing tube, and the second spring is sleeved on the guide rod.

6. The elevator safety protection buffer according to claim 1, characterized in that: A slide rail is provided on the base between the spring hydraulic shock absorber and the fixing cylinder, and the slide plate is slidably arranged on the slide rail.

7. The elevator safety protection buffer according to claim 1, characterized in that: The spring lifting shock absorbers are equally distributed along the circumference around the spring hydraulic shock absorber.

8. The elevator safety protection buffer according to claim 7, characterized in that: The spring lifting shock absorbers are provided with no less than three.

9. The elevator safety protection buffer according to claim 1, characterized in that: The spring hydraulic shock absorber includes a hydraulic cylinder, a piston, a piston rod and a third spring. The piston is arranged in the hydraulic cylinder. The piston rod is fixedly connected to the piston. The top of the piston rod is the top telescopic end of the spring hydraulic shock absorber. The third spring is arranged between the top of the piston rod and the hydraulic cylinder.

10. The elevator safety protection buffer according to claim 9, characterized in that: An anti-collision rubber block is arranged on the top of the piston rod.

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