Elevator end buffer

Abstract

This invention discloses an elevator end-of-line buffer device, comprising a support bracket for supporting the elevator car and a guide shoe mounted on the support bracket. A buffer assembly is mounted on the guide shoe, comprising: a guide rod located on the side of the guide shoe, with a slider sleeved on the guide rod; a load-bearing wheel with its axis mounted on the slider; and an elastic buffer element distributed in the same direction as the guide rod, with one end connected to the load-bearing wheel and the other end connected to the support bracket. A guide rail assembly is also provided at the bottom of the elevator shaft where the car travels, with guide rails on the guide rail assembly for guiding the load-bearing wheel to compress the elastic buffer element when the car descends. When the elevator falls, the load-bearing wheel moves down along the guide rails while compressing the elastic buffer element, thereby absorbing the kinetic energy of the falling car. The buffer assembly is integrated into the guide shoe, and the elastic buffer element is arranged in the required direction to fully utilize the space at the bottom of the elevator shaft.

Description

Technical Field

[0001] This invention belongs to the field of elevator technology, and specifically relates to an elevator end buffer device integrated with a guide shoe. Background Technology

[0002] Elevator buffers, as a type of terminal protection device, provide a last line of defense for elevator safety. They are mainly divided into energy storage and energy dissipation types. Buffers are usually installed in the pit of the elevator shaft to reduce the impact when the elevator falls to the bottom of the shaft in the event of a malfunction. Such a setup requires space in the elevator pit, especially the longitudinal space.

[0003] To reduce the depth of elevator pits and improve space utilization, a "height-variable buffer assembly for elevators" disclosed in Chinese patent literature (publication number CN110371820A) includes a movable main buffer and a fixed secondary buffer. The movable main buffer has a guide seat at its bottom, located on a sliding guide rail fixed to the bottom of the elevator pit. One end of the sliding guide rail has a stop block, and the other end has a stop block. A compression spring connects the guide seat and the stop block. A moving steel wire rope is also connected to the side of the guide seat connected to the compression spring. The end of the moving steel wire rope is connected to a drive mechanism, which is electrically connected to a crawling speed monitoring mechanism. By using a movable main buffer that moves with the elevator and a drive mechanism mounted on the elevator shaft wall, the space used in the elevator pit is reduced. However, its disadvantages are that the movable main buffer that moves with the elevator has a complex structure, is difficult to maintain, and sacrifices the side space of the elevator shaft. Summary of the Invention

[0004] To overcome the large space occupation of existing elevator end buffer devices, this invention provides a traveling cable fixing and retraction device that can utilize the lateral space at the bottom of the elevator shaft. It can be adjusted according to different elevator loads and running speeds to achieve the best buffering effect and avoid secondary damage to the car and passengers caused by rebound.

[0005] This invention is achieved through the following technical solution: an elevator end buffer device, comprising a support bracket for supporting the elevator car and a guide shoe disposed on the support bracket, wherein a buffer assembly is disposed on the guide shoe, the buffer assembly comprising: a guide rod located on the side of the guide shoe, a slider sleeved on the guide rod; a load-bearing wheel whose axis is disposed on the slider; an elastic buffer member distributed in the same direction as the guide rod, one end of which is connected to the load-bearing wheel and the other end of which is connected to the support bracket; a guide rail assembly is also disposed at the bottom of the hoistway where the car runs, wherein the guide rail assembly is provided with a guide rail for guiding the load-bearing wheel to compress the elastic buffer member when the car descends.

[0006] When the elevator malfunctions and falls, the load-bearing roller moves down along the guide rail while compressing the elastic buffer, thereby absorbing the kinetic energy of the falling car; the buffer assembly is integrated on the guide shoe, saving space; since the elastic buffer is set between the load-bearing roller and the load-bearing bracket, the arrangement direction of the elastic buffer can be adjusted as needed, such as lateral arrangement, to make full use of the space at the bottom of the elevator shaft.

[0007] Preferably, the guide rail assembly has a groove at the bottom of the guide rail to accommodate the load-bearing wheel. Due to the presence of the slider, the guide rod and the load-bearing wheel are not on the same vertical plane, so that after the load-bearing wheel squeezes the elastic buffer, it can fall into the groove to avoid rebound and secondary damage to the car and passengers.

[0008] Preferably, buffer components are symmetrically arranged on both sides of the guide shoe, and corresponding guide rails are symmetrically arranged on the guide rail assembly. The guide shoe is generally located in the middle of the side of the car, so two sets of symmetrical buffer components can be set to further improve the space utilization and the energy absorption capacity of the buffer components.

[0009] Preferably, one end of the guide rod is connected to the load-bearing wheel, and the other end is connected to the load-bearing bracket. The elastic buffer is sleeved on the outside of the guide rod, and both ends of the guide rod are fixed. The elastic buffer is sleeved on the guide rod and compresses and extends along the guide rod, so that the guide rod can guide both the load-bearing wheel and the elastic buffer at the same time, thereby improving space utilization.

[0010] Preferably, the end of the elastic buffer is provided with a knob for adjusting the spring stiffness, thereby adjusting the energy absorption capacity and speed of the elastic buffer.

[0011] Preferably, the guide shoe is provided with a positioning wheel that can move up and down within a running track on the shaft wall. The positioning wheel can move up and down along the guide rail assembly and is restricted by the track, thereby limiting the horizontal displacement of the car during elevator operation.

[0012] Preferably, at least two positioning wheels are provided, respectively located at the upper and lower ends of the guide shoe, to improve the stability of the positioning wheels.

[0013] Preferably, the guide shoe is provided with a safety pin for connecting the alarm. The safety pin faces the running track and its end can touch the guide rail assembly but there is a gap between the safety pin and the running track. When the running track becomes uneven due to breakage or other reasons, or when the guide shoe slides to the guide rail assembly, the safety pin can be directly broken and an alarm can be triggered. The existence of the gap can prevent the safety pin from being triggered due to the machining precision of the running track or minor vibrations.

[0014] Preferably, the support bracket is provided with several legs below, and the lower part of each leg is provided with a spare buffer as a supplement to the energy-absorbing buffer when the buffer component fails or is ineffective.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] When an elevator malfunctions and falls, the load-bearing rollers move down along the guide rails while compressing the elastic buffer, thereby absorbing the kinetic energy of the falling car. The buffer assembly is integrated into the guide shoes, saving space. Since the elastic buffer is located between the load-bearing rollers and the load-bearing brackets, the arrangement direction of the elastic buffer can be adjusted as needed, such as lateral arrangement, to make full use of the space at the bottom of the elevator shaft. Attached Figure Description

[0017] Figure 1 This is a general three-dimensional schematic diagram of Embodiment 1 of the present invention, including the shaft.

[0018] Figure 2 This is a three-dimensional schematic diagram of Embodiment 1 of the present invention;

[0019] Figure 3 This is a front view of Embodiment 1 of the present invention;

[0020] Figure 4 This is a three-dimensional schematic diagram of a single-sided structure according to Embodiment 1 of the present invention;

[0021] Figure 5 Embodiment 1 of the present invention and Figure 4 3D schematic diagrams of unilateral structures in different directions;

[0022] Figure 6 for Figure 4 An enlarged schematic diagram of point A in the middle;

[0023] Figure 7 for Figure 5 A magnified diagram of point B in the middle.

[0024] In the diagram: 1. Support bracket, 11. Spare buffer, 2. Guide shoe, 21. Positioning wheel, 22. Safety pin, 3. Buffer assembly, 31. Guide rod, 32. Load-bearing wheel, 33. Slider, 34. Spring, 35. Adjustment knob, 4. Well wall, 5. Guide rail assembly, 51. Guide rail, 52. Groove. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this invention easier to understand, the following description, in conjunction with the accompanying drawings and specific embodiments, further explains how this invention is implemented.

[0026] Example 1, as Figure 1-7 As shown,

[0027] An elevator end-of-line buffer device includes a quadrilateral support bracket 1 for supporting the elevator car and guide shoes 2. Two guide shoes 2 are provided and located in the middle of two opposite sides of the support bracket 1. Buffer components 3 are provided on both sides of the guide shoes 2. The buffer components 3 include:

[0028] Guide rod 31, located on the side of guide shoe 2, is generally arranged laterally. Its angle can be adjusted according to the elevator load. One end of guide rod 31 is connected to load-bearing wheel 32, and the other end is connected to the downward-protruding part of load-bearing bracket 1 to maintain a lateral arrangement. A slider 33 is fitted onto guide rod 31. Figure 6 As shown;

[0029] The load-bearing wheel 32 is rotatably connected to the slider 33;

[0030] Spring 34 is sleeved on guide rod 31 and compresses and extends along guide rod 31. One end is connected to the load-bearing wheel 32 and the other end is connected to the downward protruding part of the load-bearing bracket 1. This allows guide rod 31 to guide both the load-bearing wheel 32 and the elastic buffer, improving space utilization. The end of spring 34 is provided with a knob 35 for adjusting the stiffness of spring 34, which is used to adjust the energy absorption capacity and speed of the elastic buffer.

[0031] The number of groups of buffer component 3 can be set as needed. In this embodiment, two groups are set, one upper and one lower.

[0032] Spare buffers 11 are installed at the four corners of the support bracket 1 as a supplement to the energy-absorbing buffer when the buffer component 3 fails or is ineffective.

[0033] A guide rail assembly 5 is also installed at the bottom of the hoistway through which the car travels. On both sides of the guide rail assembly 5 are guide rails 51 used to guide the load-bearing wheels 32 to compress the elastic buffer when the car descends. The guide rails 51 are narrower at the top and wider at the bottom, and the guide rail assembly 5 has a groove 52 at the bottom of the guide rail that perfectly accommodates the load-bearing wheels 32. The specific shape of the guide rails can be adjusted according to the elevator load and operating speed to achieve the best buffering effect.

[0034] The guide shoe is equipped with positioning wheels 21 that can move up and down within a running track on the shaft wall 4. The positioning wheels 21 can move up and down along the guide rail assembly 5, and are constrained by the running track, thus limiting the horizontal displacement of the elevator car during operation. Two positioning wheels 21 are provided, one at the upper end and one at the lower end of the guide shoe 2, to improve the stability of the positioning wheels 21. The guide shoe 2 is equipped with a safety pin 22 for connecting to an alarm, such as... Figure 7 As shown, the safety pin 22 is located between the two positioning wheels 21. The safety pin 22 faces the running track and its end can touch the guide rail assembly 5, but there is a gap between the safety pin 22 and the running track. When the running track becomes uneven due to breakage or other reasons, or when the guide shoe slides to the guide rail assembly 5, the safety pin 22 can be directly broken and an alarm will be triggered. The existence of the gap can prevent the safety pin 22 from being triggered due to the machining accuracy of the running track or minor vibrations.

[0035] When the elevator malfunctions and falls, the load-bearing roller 32 moves down along the guide rail and expands outward, compressing the spring laterally. That is, by changing the outward expansion dimension of the guide rail, the longitudinal overload generated by the elevator falling is converted into a lateral overload, and the spring absorbs the kinetic energy of the car falling. Due to the presence of the slider 33, the guide rod 31 and the load-bearing roller 32 are not on the same vertical plane, so that after the load-bearing roller 32 squeezes the elastic buffer, it can fall into the groove to avoid rebound and secondary damage to the car and passengers.

[0036] In this embodiment, the spring 34 is arranged horizontally, so multiple springs can be installed, making full use of the space at the bottom of the elevator shaft.

Claims

1. An elevator end buffer device comprising a carrier bracket for carrying an elevator car and a guide shoe provided on the carrier bracket, characterized in that, The guide shoe is provided with a cushioning component, which includes: A guide rod is located on the side of the guide shoe, and a slider is fitted on the guide rod. The load-bearing wheel has its axis mounted on the slider. The elastic buffer is distributed in the same direction as the guide rod, with one end connected to the load-bearing wheel and the other end connected to the load-bearing bracket; The bottom of the hoistway where the car travels is also equipped with a guide rail assembly. The guide rail assembly is equipped with a guide rail for guiding the load-bearing wheels to compress the elastic buffer when the car descends. The guide rail is narrow at the top and wide at the bottom. The guide rail assembly is provided with a groove at the bottom of the guide rail to accommodate the load-bearing wheels. Several legs are provided below the support frame, and spare buffers are provided at the lower part of the legs; When the elevator malfunctions and falls, the load-bearing roller moves down along the guide rail and expands outward, laterally compressing the elastic buffer to absorb the kinetic energy of the falling car. The guide rod and the load-bearing roller are not on the same vertical plane. After the load-bearing roller squeezes the elastic buffer, it can fall into the groove to avoid rebound.

2. An elevator end buffer as defined in claim 1, characterized by: The guide rail assembly has a groove at the bottom of the guide rail to accommodate the load-bearing wheel.

3. Elevator end buffer according to claim 1 or 2, characterized in that: The guide shoe is symmetrically provided with buffer components on both sides, and the guide rail is symmetrically provided on the guide rail assembly.

4. Elevator end buffer according to claim 1 or 2, characterized in that: One end of the guide rod is connected to the load-bearing wheel, and the other end is connected to the load-bearing bracket. The elastic buffer is sleeved on the outside of the guide rod.

5. The elevator end-buffer device of claim 4, wherein: The end of the elastic buffer is provided with a knob for adjusting the stiffness of the spring.

6. The elevator end buffer device according to claim 1 or 2, characterized in that: The guide shoe is equipped with a positioning wheel that can move up and down within a running track on the shaft wall. The positioning wheel can move up and down along the guide rail assembly.

7. The elevator end buffer device according to claim 6, characterized in that: At least two positioning wheels are provided, one at the top and one at the bottom of the guide shoe.

8. The elevator end-buffer device of claim 6, wherein: The guide shoe is equipped with a safety pin for connecting the alarm. The safety pin faces the running track and its end can touch the guide rail assembly but there is a gap between the safety pin and the running track.

Images