Buffer device for elevator car to avoid overshooting

Abstract

This utility model provides a buffer device for elevator car overshooting, relating to the field of elevator safety technology. The buffer device includes a base plate, an energy-absorbing plate, a safety airbag, and a hydraulic buffer. The base plate is fixed to the top of the shaft. The hydraulic buffer is fixedly connected to the bottom surface of the base plate. The energy-absorbing plate is positioned below the hydraulic buffer and is slidably connected to the base plate, allowing it to rise and fall relative to the base plate. The safety airbag is fixedly connected to the bottom surface of the energy-absorbing plate. When an elevator car overshoots, the car first collides with the safety airbag. If the impact force exceeds a preset threshold, the airbag inflates within a short time to absorb the collision energy. The energy-absorbing plate continues to absorb the remaining energy, and the hydraulic buffer further reduces the collision energy. This buffer device significantly reduces the collision energy during an elevator car overshoot, minimizing harm to passengers and cargo inside the elevator car and improving elevator safety.

Description

Technical Field

[0001] This utility model relates to the field of elevator safety technology, and in particular to a buffer and blocking device for when an elevator car overshoots the top. Background Technology

[0002] An elevator is a fixed lifting device that serves designated floors. The car is part of the elevator and is used to transport passengers and goods.

[0003] When the elevator car travels within the shaft, it will directly collide with the top of the shaft if an overshoot occurs. The enormous impact force can cause damage to passengers and cargo, compromising the elevator's safety. Utility Model Content

[0004] The purpose of this utility model is to provide a buffer and blocking device when the elevator car overshoots the top, so as to solve the technical problem that the elevator overshooting failure will cause damage to passengers and goods.

[0005] The elevator car overshoot buffer device provided by this utility model includes a base plate, an energy-absorbing plate, a safety airbag, and a hydraulic buffer.

[0006] The base plate is used to fix it to the top of the shaft;

[0007] The hydraulic buffer is fixedly connected to the bottom surface of the base plate;

[0008] The energy-absorbing plate is disposed below the hydraulic buffer, and the energy-absorbing plate is slidably connected to the base plate. The energy-absorbing plate can be raised and lowered relative to the base plate.

[0009] The airbag is fixedly connected to the bottom surface of the energy-absorbing plate.

[0010] Furthermore, the buffer device for preventing the elevator car from overshooting the top also includes an airbag controller;

[0011] The airbag controller is fixedly connected to the top surface of the energy-absorbing plate;

[0012] When the impact force on the airbag exceeds a preset threshold, the airbag controller can control the gas generator to inflate the airbag.

[0013] Furthermore, a guide rod is provided on the bottom surface of the base plate, and a stop is provided at the bottom end of the guide rod;

[0014] The energy-absorbing plate is sleeved on the guide rod, and the energy-absorbing plate can move up and down along the axial direction of the guide rod. The energy-absorbing plate is positioned above the stop, and the stop can abut against the energy-absorbing plate.

[0015] Furthermore, along the first direction, two guide rods are spaced apart on the bottom surface of the base plate.

[0016] Furthermore, the energy-absorbing plate is made of aluminum.

[0017] Furthermore, the base plate is fixed to the top of the wellbore using expansion bolts.

[0018] Furthermore, the base plate has fixing holes at its four corners, through which the expansion screws pass to fix the base plate to the top of the well.

[0019] Furthermore, the base plate is provided with through holes for passing through steel wire ropes.

[0020] Furthermore, there are four airbags, and the four edge regions of the energy-absorbing plate are respectively provided with the airbags.

[0021] Furthermore, there are four hydraulic buffers, and each of the four edge areas of the base plate is provided with a hydraulic buffer.

[0022] This utility model provides an elevator car overshoot buffer device, comprising a base plate, an energy-absorbing plate, a safety airbag, and a hydraulic buffer. The base plate is fixed to the top of the shaft. The hydraulic buffer is fixedly connected to the bottom surface of the base plate. The energy-absorbing plate is disposed below the hydraulic buffer and is slidably connected to the base plate, allowing it to rise and fall relative to the base plate. The safety airbag is fixedly connected to the bottom surface of the energy-absorbing plate. When an elevator car overshoots the top, the car first impacts the safety airbag. If the impact force exceeds a preset threshold, the airbag inflates within a short time (usually tens of milliseconds) to absorb the collision energy. The energy-absorbing plate continues to absorb the remaining energy, and as the car impacts the airbag, the energy-absorbing plate moves upward until it contacts the hydraulic buffer, which further reduces the collision energy. Thus, the elevator car overshoot buffer device significantly reduces the collision energy during an overshoot, minimizing injury to passengers and cargo inside the elevator car and improving elevator safety. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1This is a diagram showing the usage status of the buffer blocking device for elevator cars when they hit the top, as provided in this embodiment of the utility model.

[0025] Figure 2 This is a schematic diagram of the energy-absorbing plate of the buffer blocking device for elevator cars when they hit the top, provided in this embodiment of the utility model.

[0026] Figure 3 This is a front view of the buffer blocking device for elevator cars when they hit the top, provided in this embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the base plate of the buffer blocking device for elevator cars when they hit the top, provided in this embodiment of the utility model.

[0028] Icons: 1 - Base plate; 11 - Fixing hole; 12 - Through hole; 2 - Energy absorption plate; 3 - Safety airbag; 4 - Hydraulic buffer; 5 - Safety airbag controller; 6 - Guide rod; 7 - Stop; 8 - Top of shaft; 9 - Car; 10 - Expansion bolt. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] This utility model provides a buffer and blocking device for when an elevator car overshoots the top. Several embodiments are given below to describe the buffer and blocking device for when an elevator car overshoots the top in detail.

[0031] The elevator car overshoot buffer device provided in this embodiment, such as... Figures 1 to 4 As shown, it includes a base plate 1, an energy-absorbing plate 2, a safety airbag 3, and a hydraulic buffer 4; the base plate 1 is used to fix to the top of the shaft 8; the hydraulic buffer 4 is fixedly connected to the bottom surface of the base plate 1; the energy-absorbing plate 2 is located below the hydraulic buffer 4, and the energy-absorbing plate 2 is slidably connected to the base plate 1, and the energy-absorbing plate 2 can be raised and lowered relative to the base plate 1; the safety airbag 3 is fixedly connected to the bottom surface of the energy-absorbing plate 2.

[0032] The base plate 1 is fixedly connected to the top of the shaft 8, so that the base plate 1 is fixed to the top of the shaft 8. The hydraulic buffer 4 is fixed on the bottom surface of the base plate 1, so that the hydraulic buffer 4 is fixed on the base plate 1. The energy-absorbing plate 2 is set below the hydraulic buffer 4. When the energy-absorbing plate 2 is in the initial position, the hydraulic buffer 4 and the energy-absorbing plate 2 are spaced apart. After the car 9 collides with the airbag 3, the energy-absorbing plate 2 rises to the preset position and can contact the hydraulic buffer 4. The airbag 3 is fixed on the bottom surface of the energy-absorbing plate 2.

[0033] When elevator car 9 experiences an overshoot, it first impacts airbag 3. If the impact force exceeds a preset threshold, airbag 3 inflates within a short time (usually tens of milliseconds) to absorb the collision energy. Energy-absorbing plate 2 continues to absorb the remaining energy, and with each impact, it moves upwards until it contacts hydraulic buffer 4. Hydraulic buffer 4 further reduces the impact energy. Thus, the buffer device significantly reduces the impact energy during an overshoot, minimizing injury to passengers and cargo inside elevator car 9 and improving elevator safety.

[0034] Furthermore, the buffer device for the elevator car to overshoot the top also includes an airbag controller 5; the airbag controller 5 is fixedly connected to the top surface of the energy-absorbing plate 2; when the impact force on the airbag 3 exceeds a preset threshold, the airbag controller 5 can control the gas generator to inflate the airbag 3.

[0035] When the airbag 3 is impacted, if the impact force on the airbag 3 exceeds a preset threshold, the airbag controller 5 immediately sends a trigger command to the gas generator. The gas generator is connected to the airbag 3. After receiving the trigger command, the gas generator produces a large amount of nitrogen gas, which causes the airbag 3 to inflate and expand in a short time (usually tens of milliseconds) to absorb the collision energy.

[0036] When the internal pressure of the airbag 3 is too high, the airbag 3 can automatically release some gas.

[0037] In one alternative embodiment, a guide rod 6 is provided on the bottom surface of the base plate 1, and a stop 7 is provided at the bottom end of the guide rod 6; the energy-absorbing plate 2 is sleeved on the guide rod 6, and the energy-absorbing plate 2 can be raised and lowered along the axial direction of the guide rod 6; the energy-absorbing plate 2 is positioned above the stop 7, and the stop 7 can abut against the energy-absorbing plate 2.

[0038] The guide rod 6 is fixed on the bottom surface of the base plate 1. The axial direction of the guide rod 6 is set in the vertical direction. The bottom end of the guide rod 6 is fixed with a stop 7. The stop 7 can be a sheet or a block or any other suitable structure.

[0039] The energy-absorbing plate 2 is sleeved on the guide rod 6 so that the energy-absorbing plate 2 can rise and fall relative to the base plate 1 along the axial direction of the guide rod 6. The energy-absorbing plate 2 is located above the stop 7. When the energy-absorbing plate 2 contacts the stop 7, the stop 7 blocks the energy-absorbing plate 2, so that the energy-absorbing plate 2 no longer continues to descend. At this time, the energy-absorbing plate 2 is in the initial position and is suspended on the guide rod 6.

[0040] Furthermore, the guide rod 6 can guide the lifting and lowering of the energy-absorbing plate 2.

[0041] The number of guide rods 6 can be one or more.

[0042] For example, along the first direction, two guide rods 6 are spaced apart on the bottom surface of the base plate 1. One end of the energy-absorbing plate 2 is fitted onto one guide rod 6, and the other end of the energy-absorbing plate 2 is fitted onto another guide rod 6, which enables the energy-absorbing plate 2 to rise and fall more smoothly and the guiding path to be more precise.

[0043] In addition, there can be four guide rods 6, which are arranged at intervals along the circumference of the energy-absorbing plate 2, and are connected one-to-one with the four corner areas of the energy-absorbing plate 2.

[0044] First direction such as Figure 1 The direction indicated by the middle arrow ab.

[0045] The stop 7 can be inverted triangular, rectangular, or any other suitable form.

[0046] When the energy-absorbing plate 2 is in its initial position, the airbag 3 is positioned lower than the stop 7 in the vertical direction. That is, the airbag 3 is located below the stop 7. When the elevator car 9 experiences a top-over-top failure, the car 9 will first collide with the airbag 3 to prevent the stop 7 from interfering with the collision between the elevator car 9 and the airbag 3.

[0047] In other alternative embodiments, a slide rail can be provided on the bottom surface of the base plate 1, with a stop 7 at the bottom end of the slide rail. The energy-absorbing plate 2 is slidably connected to the slide rail, which extends vertically, allowing the energy-absorbing plate 2 to rise and fall along the extension direction of the slide rail. The energy-absorbing plate 2 is positioned above the stop 7, and the stop 7 can abut against the energy-absorbing plate 2. The stop 7 can be inverted triangular, rectangular, or any other suitable form. When the energy-absorbing plate 2 is in its initial position, the airbag 3 is positioned lower than the stop 7 in the vertical direction, i.e., the airbag 3 is located below the stop 7. In the event of an overshoot fault in the elevator car 9, the car 9 will first collide with the airbag 3, preventing the stop 7 from interfering with the collision between the elevator car 9 and the airbag 3.

[0048] Furthermore, the energy-absorbing panel 2 is made of aluminum.

[0049] The aluminum energy-absorbing plate 2 also has the characteristics of low density, light weight, high strength (approaching or exceeding that of high-quality steel), and good plasticity of aluminum alloy.

[0050] The energy-absorbing panel 2 has a honeycomb structure inside. The energy-absorbing panel 2 mainly absorbs energy through collapse and deformation, similar to the structure of a crash beam, which reduces the accumulation of energy and reduces the impact between the top of the car 9 and the top of the hoistway 8.

[0051] Furthermore, the base plate 1 is fixed to the top of the shaft 8 by expansion bolts 10.

[0052] The base plate 1 is fixed to the top of the shaft 8 by expansion bolts 10, which can firmly fix the base plate 1 to the top of the shaft 8 to prevent the base plate 1 from falling and improve the reliability of the buffer blocking device when the elevator car 9 hits the top.

[0053] The base plate 1 can be fixed to the top of the wellbore 8 by multiple expansion bolts 10, and the multiple expansion bolts 10 can be spaced apart along the circumference of the base plate 1.

[0054] Furthermore, the four corner areas of the base plate 1 are respectively provided with fixing holes 11, and the expansion screws 10 pass through the fixing holes 11 to fix the base plate 1 to the top of the well 8.

[0055] The base plate 1 is a rectangular base plate 1 with four corner areas. Each corner area is provided with a fixing hole 11, and each fixing hole 11 is provided with an expansion screw 10. The expansion screw 10 passes through the fixing hole 11 to fix the base plate 1 to the top of the well 8.

[0056] By fixing the base plate 1 to the top of the shaft 8 through the four corner areas, the base plate 1 and the top of the shaft 8 can be stably connected.

[0057] In the case of a small area of ​​the base plate 1 or an elevator without a machine room, the base plate 1 only covers the central area of ​​the top 8 of the shaft. The base plate 1 does not interfere with the operation of the wire rope, and there is no need to reserve through holes 12 on the base plate 1.

[0058] In cases where the base plate 1 has a large area or is a machine room elevator, and the base plate 1 covers the entire top of the shaft 8, a through hole 12 needs to be provided on the base plate 1. The through hole 12 is used for the wire rope to pass through, so as to reserve space for the wire rope to run and allow the elevator to work normally. The position of the through hole 12 is set according to the position of the wire rope.

[0059] The number of airbags 3 can be one or more. When there are multiple airbags 3, the multiple airbags 3 can be arranged at intervals along the circumference of the energy-absorbing plate 2.

[0060] In this embodiment, there are four airbags 3, and airbags 3 are respectively provided in the four edge areas of the energy-absorbing plate 2.

[0061] Specifically, the airbag 3 is positioned at the midpoint of the four edge regions of the energy-absorbing plate 2.

[0062] The edge region of the energy-absorbing plate 2 is the area extending a certain distance from the edge of the energy-absorbing plate 2 towards the center of the energy-absorbing plate 2, such as 10cm, 20cm or 30cm or any other suitable distance.

[0063] The energy-absorbing plate 2 is rectangular, and safety airbags 3 are installed in the four edge areas of the energy-absorbing plate 2, which can effectively reduce the impact of the collision.

[0064] The number of hydraulic buffers 4 can be one or more. When there are multiple hydraulic buffers 4, they can be spaced apart circumferentially along the base plate 1.

[0065] In this embodiment, there are four hydraulic buffers 4, and the four edge areas of the base plate 1 are respectively provided with hydraulic buffers 4.

[0066] Specifically, the hydraulic buffer 4 is positioned at the midpoint of the four edge regions of the base plate 1.

[0067] The edge region of the base plate 1 is the area extending a certain distance from the edge of the base plate 1 to the center of the base plate 1, such as 10cm, 20cm or 30cm, or any suitable distance.

[0068] The base plate 1 is rectangular, and hydraulic buffers 4 are installed at the four edges of the base plate 1 to effectively reduce impact.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An elevator car top-impact cushioning and blocking device, characterized in that, Includes base plate, energy-absorbing plate, airbag and hydraulic buffer; The base plate is used to fix it to the top of the shaft; The hydraulic buffer is fixedly connected to the bottom surface of the base plate; The energy-absorbing plate is disposed below the hydraulic buffer, and the energy-absorbing plate is slidably connected to the base plate. The energy-absorbing plate can be raised and lowered relative to the base plate. The airbag is fixedly connected to the bottom surface of the energy-absorbing plate.

2. The elevator car overrun bumper and barrier arrangement of claim 1, wherein, The elevator car overshoot buffer device also includes an airbag controller. The airbag controller is fixedly connected to the top surface of the energy-absorbing plate; When the impact force on the airbag exceeds a preset threshold, the airbag controller can control the gas generator to inflate the airbag.

3. The elevator car overrun bumper and blocker device of claim 1, wherein, A guide rod is provided on the bottom surface of the base plate, and a stop is provided at the bottom end of the guide rod; The energy-absorbing plate is sleeved on the guide rod, and the energy-absorbing plate can move up and down along the axial direction of the guide rod. The energy-absorbing plate is positioned above the stop, and the stop can abut against the energy-absorbing plate.

4. The buffer and blocking device for elevator car overshooting the top as described in claim 3, characterized in that, Along the first direction, two guide rods are spaced apart on the bottom surface of the base plate.

5. The buffer and blocking device for elevator car overshooting the top as described in claim 1, characterized in that, The energy-absorbing panel is made of aluminum.

6. The buffer and blocking device for elevator car overshooting the top as described in claim 1, characterized in that, The base plate is fixed to the top of the shaft with expansion bolts.

7. The buffer and blocking device for elevator car overshooting the top as described in claim 6, characterized in that, The base plate has fixing holes at its four corners, and the expansion screws pass through the fixing holes to fix the base plate to the top of the well.

8. The buffer and blocking device for elevator car overshooting the top as described in claim 1, characterized in that, The base plate has through holes for passing through steel wire ropes.

9. The buffer and blocking device for elevator car overshooting the top as described in claim 1, characterized in that, The safety airbags are four in number, and the four edge regions of the energy-absorbing plate are respectively provided with the safety airbags.

10. The buffer and blocking device for elevator car overshooting the top as described in claim 1, characterized in that, There are four hydraulic buffers, and each of the four edge areas of the base plate is provided with a hydraulic buffer.

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