Pop-up two-stage crash box

Abstract

A pop-up two-stage crash box, comprising: a front baffle (3), a first-stage crash box, limiting and locking mechanisms (11), a second-stage crash box, a device for pushing the first-stage crash box to pop up, and a tail baffle (4).

Description

Pop-up two-stage collapse box Technical Field

[0001] This invention belongs to the field of collision safety, with a focus on automobile collision safety and elevator fall safety. Background Technology

[0002] With the improvement of road conditions and the development of the automobile industry in my country, there are more and more cars on the road, and the driving speed is gradually increasing, resulting in frequent traffic accidents and huge losses.

[0003] The main function of an automotive energy-absorbing box is to absorb impact energy when a car collides, thereby reducing injury to the driver, passengers, and the vehicle itself.

[0004] Currently, commonly used automotive energy-absorbing boxes are mainly single-stage structures. Due to the limitations of car length and space, the crumple zone is not long enough, the collision acceleration is large, the energy absorption is insufficient, and the protection for drivers, passengers, and the vehicle is inadequate.

[0005] Although the patent with authorization announcement number CN115257609B adopts a pop-up structure and increases the crumple length, the structure is complex and occupies a lot of the already limited space. It cannot maximize the crumple length, and its structure cannot be sealed to compress and absorb the high-pressure gas generated by the explosion. Its crumple energy absorption effect has a lot of room for improvement. The structure is not very stable. In the long-term movement and vibration of the car, and in environments with high dust and mud, it is prone to failures such as falling off, rusting, jamming and not being able to pop out, or failing to lock after popping out. It is also difficult to maintain.

[0006] Currently, the last line of defense for elevator safety in case of a fall is to install springs at the four corners of the elevator base or on its sides to cushion the impact. Springs installed at the bottom have a short compression stroke and do not absorb enough energy, while springs installed on the sides take up a lot of space. Technical issues

[0007] This invention features a pop-out two-stage collapse box that almost doubles the collapse stroke without increasing the length of the vehicle. After installation at the bottom of the elevator, only the depth of the elevator shaft needs to be increased slightly to achieve energy absorption through the collapse of the two-stage cylinder walls. At the same time, the high-pressure gas that pushes the first-stage collapse box out is also compressed and absorbs energy together, making the collision smoother and the energy absorption more complete, thus providing better protection for the driver, passengers, and the people inside the vehicle or elevator, as well as the elevator itself. Technical solutions

[0008] Taking automobile collision safety as an example, the technical solution provided by this invention is as follows:

[0009] Pop-up two-stage collapse box, including:

[0010] The first-stage collapse box consists of the first-stage collapse box wall 1 and the front baffle 3; the second-stage collapse box consists of the second-stage collapse box wall 2 and the tail baffle 4; the rear cover 5; the connecting ring 6; the limiting and locking mechanism 11; and the explosive device 10.

[0011] The front baffle 3 also serves as a front mounting plate connecting to the anti-collision beam, and the rear baffle 4 also serves as a rear mounting plate connecting to the vehicle body.

[0012] The rear cover plate 5 is installed at the end of the first-stage collapse box wall 1, preferably by welding, which can enhance the structural strength of the first-stage collapse box and prevent it from cracking due to the strong pressure of high-pressure gas; multiple holes are drilled on the plate, through which high-pressure gas can fill the first and second-stage collapse boxes; each edge of the front side of the plate is chamfered into a bevel so that the pin 13 can pass through smoothly.

[0013] The device providing the ejection power for the first-stage crumple zone is an explosive device 10, installed inside the cavity of the two-stage crumple zone or inside a high-pressure resistant tank. A high-pressure gas pipe connects the high-pressure resistant tank and the cavity at the end of the second-stage crumple zone via a one-way valve. The device is also mounted on the vehicle body near the outside of the two-stage crumple zones. It is connected to the vehicle control system via a detonation signal line or a wireless detonation device, or both detonation methods can be used together to ensure successful detonation. When the vehicle detects an impending collision, the control system detonates the explosive device 10. The high-pressure gas generated by the explosion propels the first-stage crumple zone out and is compressed and absorbs energy along with the collapse of the two-stage crumple zones.

[0014] The high-pressure gas in a high-pressure tank installed on the vehicle body can also provide power for the first-stage crumple zone to pop out. A high-pressure gas pipe connects the inner cavity of the second-stage crumple zone to the high-pressure gas tank through a one-way valve and a gas distribution valve. When a collision is about to occur, the vehicle control system opens the corresponding valve, and the high-pressure gas enters the inner cavity of the two-stage crumple zone, pushing the first-stage crumple zone to pop out. The first-stage crumple zone is compressed and absorbs energy along with the collapse of the two-stage crumple zone.

[0015] The device providing the power to eject the first-stage crumple zone can also consist of a cylinder, a high-pressure gas tank, and a gas distribution valve. The piston rod of the cylinder is connected to the first-stage crumple zone, and the cylinder body is mounted on the vehicle body near the two-stage crumple zones. When a collision is imminent, the vehicle control system opens the valve corresponding to the gas distribution valve, releasing a certain amount of high-pressure gas stored in the high-pressure gas tank on the vehicle into the cylinder, pushing the piston rod forward and causing the first-stage crumple zone to eject.

[0016] The device providing the ejection power for the first-stage crumple zone and the limiting and locking mechanism can also consist of a spring, a solenoid valve, a latch, and a latch seat. One end of the spring is connected to the first-stage crumple zone, and the other end is connected to the second-stage crumple zone or the vehicle body. The latch seat is installed on the vehicle body or the second-stage crumple zone, and the latch is installed on the first-stage crumple zone. The moving iron core of the solenoid valve is connected to the latch. Under normal conditions, the spring is limited within its elastic deformation range by the latch and the latch seat, and the main body of the first-stage crumple zone is confined together within the second-stage crumple zone. When a collision is imminent, the vehicle control system energizes the solenoid valve, and the moving iron core of the solenoid valve pushes the latch and the latch seat apart, causing the spring to eject the first-stage crumple zone.

[0017] The first-stage collapse chamber wall 1 and the second-stage collapse chamber wall 2 have multiple collapse grooves 7. Collapse chambers using this groove design provide excellent sealing, effectively trapping the high-pressure gas propelling the first-stage collapse chamber within the inner cavities of both chambers. This high-pressure gas is then compressed and energy absorbed during collapse. In contrast, collapse chambers using the common orifice design cannot seal high-pressure gas. Upon impact, the collapse of the two-stage collapse chambers begins with the collapse grooves 7, leading to rupture and the release of high-pressure gas. Collapse continues until complete, maintaining high pressure throughout the release process and continuously participating in energy absorption.

[0018] In addition to rupturing the collapse groove, other methods to allow high-pressure gas to escape and thus complete the collapse are blind hole schemes and through hole schemes, with the blind hole scheme being preferred.

[0019] The blind hole scheme is as follows: One or more blind holes 15 that cannot be penetrated are drilled and milled on the front baffle 3 or the tail baffle 4 and the walls of the two-stage collapse box. The blind holes 15 are not limited to circles and can also be other shapes. Preferably, the blind holes are located on the front baffle 3 or the front end of the first-stage collapse box wall 1. Such blind holes are far from the explosive device, that is, far from the explosion center. When the high-pressure gas generated by the explosion reaches the blind hole, the gas pressure has dropped significantly and is insufficient to break through the blind hole. The drilling and milling direction of the blind holes is preferably from the inner cavity of the two-stage collapse box outwards. However, due to the difficulty of machining, it is preferred to machine the blind holes from the outside inwards on the wall of the first-stage collapse box. As shown in Figure 3 of the instruction manual, the blind holes are not visible on the front baffle 3 from this perspective, while the blind holes 15 marked are clearly visible on the tail baffle 4. When the collision occurs and the collapse occurs, the high-pressure gas that pushes the first-stage collapse box outwards is further compressed. When the gas pressure rises to a certain level, the high-pressure gas breaks through the blind hole 5 and escapes. This solution is more stable and reliable than the collapse groove rupture method.

[0020] The through-hole design involves replacing the blind hole 15 with a through hole and then sealing it with a rubber plug. During the collision and collapse process, the high-pressure gas ejected from the first-stage collapse box is further compressed. When the pressure reaches a certain level, the high-pressure gas forces out the rubber plug and leaks out. Compared to the blind hole design, the rubber plug will age and harden over time, leading to instability and requiring regular maintenance and replacement.

[0021] Multiple recessed grooves 8 are made on the outer side of the first-stage collapse box cylinder wall 1 along the ejection direction. The recessed grooves 8 can greatly increase the bending resistance of the first-stage collapse box. The recessed grooves 8 also serve as guide grooves, which can guide the first-stage collapse box to smoothly eject from the second-stage collapse box along the protrusion of the connecting ring 6.

[0022] The inner side of the connecting ring 6 has a protrusion that matches the corresponding recessed groove 8. It is installed at the front end of the second-stage collapse box wall 2, preferably by welding, to guide the ejection of the first-stage collapse box and to block the rear cover plate 5 at the end of the first-stage collapse box to prevent it from escaping from the second-stage collapse box.

[0023] 2. Make a pin hole 9 on each or more sides of the second-stage collapse box wall near the front end.

[0024] The limiting and locking mechanism 11 of the first-stage collapse box includes: a cover 12, a pin 13, and a compression spring 14, wherein the cover 12 is installed on the outside of the second-stage collapse box cylinder wall 2 at the location corresponding to the pin hole 9 by welding or bolting.

[0025] The top of the pin 13 is an arc shape that matches the crumple groove 7. Multiple pins 13 can stably confine the first-stage crumple box within the second-stage crumple box, and when the explosion occurs and the first-stage crumple box is ejected, it can smoothly pass over the sloping rear cover plate 5.

[0026] The pin 13 has protrusions on both sides of its end, which extend beyond the pin hole 9 to ensure that the pin 13 does not pass through the pin hole 9 and fall out of the cover 12 when it pops out.

[0027] The middle part of the end of the pin 13 has multiple holes for inserting compression springs 14.

[0028] Limiting and locking mechanism: Under normal conditions, the pin 13 is inserted into the pin hole 9, pressing against the collapse groove 7 of the first-stage collapse box, thus limiting the first-stage collapse box within the second-stage collapse box. High-pressure gas generated by an explosion or gas in a high-pressure gas tank pushes the first-stage collapse box forward, compressing the compression spring 14. The first-stage collapse box breaks through the limitation of the pin 13 and moves forward. The pin 13 passes over the rear cover plate 5 with its sloping edge, and the first-stage collapse box moves forward until it is blocked by the connecting ring 6. At this point, the pin 13 is ejected by the compression spring 14, locking the first-stage collapse box and preventing it from retreating.

[0029] With the two-stage crumple zone of this invention, the installation, connection method, and strength of the bumper, grille, car lights, etc., driven by the anti-collision beam that pops out with the first-stage crumple zone need to be adjusted accordingly, so that the first-stage crumple zone can drive the anti-collision beam to pop out smoothly.

[0030] The first-stage collapse box wall 1, the front baffle 3, and the rear cover 5 are made of aluminum alloy and are welded together by friction stir welding. Similarly, the second-stage collapse box wall 2, the tail baffle 4, and the connecting ring 6 are also made of aluminum alloy and are all welded by friction stir welding, which can improve the welding strength by 30% to 50%.

[0031] The subject of this invention is: when a vehicle sensing system detects an impending collision, the control system activates the explosive device 10, causing an explosion that generates high-pressure gas. Alternatively, the control system opens a corresponding gas control valve, allowing high-pressure gas from the high-pressure storage tank to enter the two-stage crumple zone, pushing the first-stage crumple zone out. Subsequently, a limiting and locking mechanism locks the first-stage crumple zone. When a collision occurs, the first and second-stage crumple zones simultaneously collapse and absorb energy, with the internal high-pressure gas being compressed and absorbing energy synchronously. As the crumple process progresses, the crumple groove ruptures, and / or the blind hole is ruptured, allowing the high-pressure gas to leak out. The crumple process continues until it is complete.

[0032] This invention relates to a pop-out two-stage collapse box for elevator fall safety. A preferred explosive device 10 provides the power for the first-stage collapse box to pop out, and the explosive device 10 is placed inside the cavity of the two-stage collapse box. The pop-out two-stage collapse boxes can be installed at the four corners or two opposite corners of the elevator bottom, or a single large pop-out two-stage collapse box can be installed at the bottom of the elevator. Distance sensors, speed monitoring devices, the detonation device, and its control system are installed at the bottom of the elevator or other suitable locations, and are powered by the elevator's power supply system.

[0033] To ensure power supply safety, an independent power supply system is installed. Its main component is a rechargeable emergency power supply, which is automatically charged by the elevator power supply system or directly powered by batteries. This independent power supply system, along with the elevator's power supply system, provides power to the distance sensor, speed monitoring device, detonation device, and its control system, ensuring power supply in case of elevator malfunction and power supply system failure. When the elevator falls out of control and, at a preset distance from the bottom of the elevator shaft, the speed exceeds a set danger threshold, the control system triggers the detonation device. The high-pressure gas generated by the explosion ejects the first-stage collapse box. During the collision with the bottom of the elevator shaft, both collapse boxes collapse together to absorb energy, and the high-pressure gas inside both collapse boxes is also compressed and participates in energy absorption.

[0034] Compared to the commonly used spring-loaded shock absorption device at the bottom of elevators, the pop-out two-stage collapse box device of this invention has a larger energy absorption stroke. At the same time, the high-pressure gas is compressed and absorbed, making the collision smoother and providing better protection for the people inside the elevator and the elevator itself.

[0035] This invention addresses elevator fall safety, and the two-stage collapsible box ejection can also utilize a spring and electromagnet scheme. The device providing the ejection power for the first-stage collapsible box, along with the limiting and locking mechanism, can consist of a spring, a solenoid valve, a latch and latch seat, and a control system. One end of the spring is connected to the first-stage collapsible box, and the other end is connected to the elevator body. The latch seat is installed on the elevator body, and the latch is mounted on the first-stage collapsible box. The moving iron core of the solenoid valve is connected to the latch. When a collision is imminent, the control system energizes the solenoid valve, causing the moving iron core to push the latch away from the latch seat. The spring then ejects the first-stage collapsible box. During the collision, both stages of the collapsible box collapse together, absorbing energy. Similarly, the control system and electromagnet are powered by the elevator's power supply system and a separately installed independent internal power supply system. Using this scheme, the elevator has a longer energy-absorbing stroke, significantly reducing the impact energy experienced by occupants. Beneficial effects

[0036] During a collision, the pop-out two-stage crumple zone collapses simultaneously with the first and second stages to absorb energy. The crumple stroke is almost double that of the current single-stage crumple zone, greatly improving the energy absorption capacity. At the same time, the high-pressure gas that pushes the first stage crumple zone out is compressed and absorbs energy, making the collision smoother and greatly reducing the damage to the occupants and the vehicle body of both vehicles involved in the collision.

[0037] This invention achieves a significant increase in crumple zone length without increasing vehicle body length, thus having virtually no impact on the original vehicle's design and manufacturing.

[0038] The overall structure of this invention has good airtightness, and the high-pressure gas generated by the explosion is effectively compressed and absorbed. Dust and sand are also difficult to enter the two-stage collapse box, making it less prone to jamming or failure to eject, and easy to maintain. The invention with authorization announcement number CN115257609B lacks airtightness, cannot compress gas to absorb energy, and is also prone to rusting and jamming due to dust and sand entering.

[0039] This invention features a simple structure, makes full use of limited space, maximizes the collapse length of the two-stage collapse box, exhibits high stability, and is inexpensive, facilitating rapid promotion and benefiting the public. It is also significantly superior to the invention authorized by publication number CN115257609B.

[0040] This invention is installed at both the front and rear of the vehicle body, which can better protect the safety of the driver, passengers and the vehicle, and can also greatly reduce the injury to the other party. If both vehicles involved in a collision use this invention, the safety will be greatly improved again.

[0041] Regarding the safety of elevators falling into shafts due to malfunction, the pop-out two-stage collapse box of this invention has a greater energy absorption stroke than installing springs at the four corners of the elevator bottom; and it occupies less space than installing springs on the sides. As a last line of defense, it can provide better protection for people inside the elevator. Attached Figure Description

[0042] Figure 1 is a schematic diagram of the structure of the first-stage collapse box of the pop-up two-stage collapse box of the present invention before it pops out.

[0043] Figure 2 is a schematic diagram of the structure of the pop-up two-stage collapse box of the present invention after the first stage collapse box pops out.

[0044] Figure 3 is a schematic diagram of the exploded two-stage collapse box structure described in this invention.

[0045] Figure 4 is a schematic diagram of the overall structure (11) and the exploded structure (12, 13, 14) of the limiting and locking mechanism of the pop-up two-stage collapse box of the present invention.

[0046] In the diagram: 1-First-stage collapse box wall, 2-Second-stage collapse box wall, 3-Front baffle, 4-Tail baffle, 5-Rear cover, 6-Connecting ring, 7-Collapse groove, 8-Recessed groove, 9-Pin hole, 10-Explosive device, 11-Limiting and locking mechanism, 12-Cover, 13-Pin, 14-Compression spring, 15-Blind hole. The best embodiment of the present invention

[0047] The pop-out two-stage crumple zone of this invention comprises a first-stage crumple zone consisting of a first-stage crumple zone wall 1 and a front baffle 3, a second-stage crumple zone consisting of a second-stage crumple zone wall 2 and a rear baffle 4, a limiting and locking mechanism, and a device providing the pop-out power for the first-stage crumple zone. The front baffle 3 can also serve as a front mounting plate connecting to the anti-collision beam, and the rear baffle 4 can also serve as a rear mounting plate connecting to the vehicle body. Under normal conditions, the main body of the first-stage crumple zone is confined within the second-stage crumple zone. After the first-stage crumple zone pops out from the second-stage crumple zone, the crumple length is almost doubled, which greatly improves the energy absorption capacity compared to existing energy-absorbing boxes, significantly reduces the damage to occupants and the vehicle body, and does not require increasing the vehicle body length or affecting the original vehicle body design.

[0048] The rear cover plate 5 is installed at the end of the first-stage collapse box wall 1. It is preferably welded to enhance the structural strength of the first-stage collapse box and will not crack due to the strong pressure of the high-pressure gas. Multiple holes are drilled on the plate so that the high-pressure gas can instantly fill the two-stage collapse box through these holes. Each edge of its front side is chamfered to allow the pin 13 to pass smoothly.

[0049] The device that powers the ejection of the first-stage crumple zone in this invention is preferably an explosive device 10. This device is connected to the vehicle control system via a detonation signal line or a wireless detonation device, or a combination of both methods, further ensuring successful detonation. The explosive device 10 is mounted on the front side of the rear cover 5 of the first-stage crumple zone, ensuring a greater length for the first-stage crumple zone's wall. When the vehicle monitoring system detects an impending collision, the control system detonates the explosive device 10. The high-pressure gas generated by the explosion instantly fills the cavities of the first and second-stage crumple zones through holes in the rear cover 5, ejecting the first-stage crumple zone. During the collision, the first and second-stage crumple zones are compressed and absorb energy. Simultaneously, the high-pressure gas within the cavities of both stages is compressed and absorbs energy, increasing the overall energy absorption effect and making the collision smoother. At the explosion center, the gas pressure is very high. The structural strength of the two closest stages of the explosion must withstand the high pressure of the explosion while also meeting the requirements for crumple and energy absorption, thus placing relatively high demands on manufacturing. Embodiments of the present invention

[0050] The explosive device 10 is installed inside a high-pressure resistant container, and then connected to the inner cavity of the second-stage crumple zone via a one-way valve and a high-pressure gas pipe. It is then mounted on a vehicle body near the outside of both crumple zones, ensuring that the first-stage crumple zone wall has its maximum length. Although the high-pressure gas generated by the explosion instantly fills the inner cavity of both crumple zones, its entry through the high-pressure gas pipe and one-way valve is a gradual process. The high-pressure gas ejects the first-stage crumple zone and continues to enter, maintaining a pressure consistently lower than the pressure at the explosion center. This results in a relatively smaller impact on the two-stage crumple zones, a wider controllable range of structural strength, and easier manufacturing.

[0051] The high-pressure gas in a high-pressure tank installed on the vehicle body can also provide power for the first-stage crumple zone to pop out. A high-pressure gas pipe connects the inner cavity of the second-stage crumple zone to the high-pressure gas tank through a one-way valve and a gas distribution valve. When a collision is about to occur, the vehicle control system opens the corresponding valve, and the high-pressure gas enters the inner cavity of the two-stage crumple zone through the one-way valve, pushing the first-stage crumple zone to pop out. The gas is compressed and absorbs energy along with the collapse of the two-stage crumple zone.

[0052] A cylinder can also provide the power for the first-stage crumple zone to eject. The entire system includes a cylinder, a high-pressure gas tank mounted on the vehicle body, and a gas distribution valve. Specifically, the cylinder is mounted next to the two-stage crumple zone, with its piston connected to the first-stage crumple zone. A high-pressure gas pipe connects the cylinder and the high-pressure gas tank on the vehicle body via the gas distribution valve. When a collision is imminent, the vehicle control system opens the corresponding gas distribution valve, releasing a certain amount of high-pressure gas into the cylinder. The piston then ejects, causing the first-stage crumple zone to eject. In this method, the crumple grooves 7 of the two-stage crumple zones can also be commonly used crumple holes. Since the high-pressure gas does not enter the inner cavity of the two-stage crumple zones, there is no compression and energy absorption of the high-pressure gas inside the two-stage crumple zones, resulting in a slight reduction in overall efficiency.

[0053] The mechanism that uses a spring to eject the first-stage crumple zone mainly consists of a spring, a latch and latch seat, and a solenoid valve. One end of the spring is connected to the first-stage crumple zone, and the other end is connected to the vehicle body or the second-stage crumple zone. The spring can be a compression spring or a tension spring. By adding a fixed pulley, a tension spring can function as a compression spring. The latch seat is mounted on the vehicle body, and the latch is mounted at the top front of the first-stage crumple zone. The moving iron core of the solenoid valve is connected to the latch, and the solenoid valve is connected to the vehicle control system. Taking a compression spring as an example, under normal conditions, the latch is engaged with the latch seat, compressing the spring to a certain extent. The main body of the first-stage crumple zone is confined within the second-stage crumple zone. When a collision is imminent, the vehicle control system drives the moving iron core of the solenoid to push the latch, causing it to disengage from the latch seat, and the spring causes the first-stage crumple zone to eject. Using an external mounting method ensures more space for the first-stage crumple zone than having the spring built into both stages, maximizing its length. In this way, the collapse groove 7 of the two-stage collapse box can be the collapse hole used in common collapse boxes. Without the high-pressure gas in the two-stage collapse box being compressed and absorbed, the overall energy absorption effect is reduced to a certain extent.

[0054] The first-stage collapse box wall 1 and the second-stage collapse box wall 2 have multiple collapse grooves 7, perpendicular to the ejection direction of the first-stage collapse box. Collapse boxes using this groove design offer excellent airtightness, sealing the high-pressure gas propelling the first-stage collapse box within the inner cavities of both stages. This high-pressure gas is then compressed and energy absorbed during the collapse process. In contrast, collapse boxes using the common orifice design cannot seal the high-pressure gas. Upon impact, the collapse of the two stages begins with the collapse grooves 7, leading to rupture and the release of high-pressure gas. Collapse continues until complete, with the high-pressure gas maintaining a high pressure state throughout the release process, constantly participating in energy absorption.

[0055] In addition to rupturing the collapse groove, other methods to allow high-pressure gas to escape and thus complete the collapse are blind hole schemes and through hole schemes, with the blind hole scheme being preferred.

[0056] The blind hole scheme is as follows: One or more blind holes 15, which cannot be penetrated, are drilled and milled on the front baffle 3, the tail baffle 4, or the walls of the two-stage collapse box. The blind holes 15 are not limited to circles and can also be other shapes. Preferably, the blind holes 15 are drilled and milled on the front baffle 3 or the front end of the first-stage collapse box wall 1. In this way, the blind holes are far from the explosive device, i.e., the explosion center. When the high-pressure gas generated by the explosion reaches the blind holes, the gas pressure has dropped significantly and is insufficient to break through the blind holes. The drilling and milling direction of the blind holes is preferably from the inner cavity of the two-stage collapse box outwards. However, due to the difficulty of machining, it is preferred to drill and mill the blind holes on the walls of the first-stage collapse box from the outside inwards. As shown in Figure 3 of the instruction manual, the blind holes are not visible on the front baffle 3 from this perspective, but they are visible on the tail baffle 4. When the collision occurs and the collapse occurs, the high-pressure gas that pushes the first-stage collapse box outwards is further compressed. When the gas pressure rises to a certain level, the high-pressure gas breaks through the blind holes 5 and escapes. This solution is more stable and reliable than the collapse groove rupture method, and the collapse groove 7 does not need to be considered for rupture during production. The wall thickness tolerance at this point can be greater, making it easier to produce.

[0057] The through-hole design involves replacing the blind hole 15 with a through hole and then sealing it with a rubber plug. During the collision and collapse process, the high-pressure gas ejected from the first-stage collapse box is further compressed. When the pressure reaches a certain level, the high-pressure gas forces out the rubber plug and leaks out. However, the rubber plug may age and harden over the years, becoming unstable and requiring regular inspection and replacement.

[0058] Multiple recessed grooves 8 are made on the outer side of the first-stage collapse box cylinder wall 1 along the ejection direction, corresponding to the protrusions of the connecting ring 6. These grooves serve as guide grooves when the first-stage collapse box ejects and also greatly increase its bending resistance.

[0059] The second-stage collapse box wall 2 has a pin hole 9 drilled on each side or several sides near the front end. The cross-section of the pop-up two-stage collapse box wall of the present invention is not limited to a quadrilateral, such as a regular hexagon. Preferably, three pin holes are drilled and evenly distributed on the six sides.

[0060] The connecting ring 6 is welded to the front end of the second-stage collapse box wall 2. The inner side of the connecting ring 6 has multiple protrusions that match the recessed groove 8, guiding the first-stage collapse box to pop out smoothly and blocking the rear cover plate 5 at the end of the first-stage collapse box.

[0061] As shown in Figure 4, the limiting and locking mechanism 11 of the first-stage collapse box includes: a cover 12, a pin 13, and a compression spring 14. The top of the pin 13 is an arc shape that matches the collapse groove 7, and its end has multiple holes into which the compression spring 14 is inserted. There are protrusions on both sides of the end, and the protrusions extend beyond the pin hole 9.

[0062] The limiting and locking mechanism 11 of the first-stage collapse box is installed on the outer side of the second-stage collapse box cylinder wall 2 at the position corresponding to the pin hole 9, preferably by welding.

[0063] Under normal conditions, the pin 13 is pressed against the collapse groove 7 of the first-stage collapse box by the compression spring 14 through the pin hole 9, thus confining the main body of the first-stage collapse box within the second-stage collapse box. Taking the detonating explosive device 10 as an example, the high-pressure gas pushes the first-stage collapse box to break through the restraint of the pin 13 and pop out. Because the top of the pin 13 is arc-shaped, it goes over the slope of the rear cover plate 5 of the first-stage collapse box. The rear cover plate 5 on the first-stage collapse box is blocked by the protrusion of the connecting ring 6. At this time, the pin 13 pops out inward under the action of the compression spring 14, locking the first-stage collapse box. The end of the pin 13 is blocked outside the pin hole 9 because the protruding part exceeds the pin hole 9, and will not detach from the cover 12. The limiting and locking mechanism 11 of the first-stage collapse box of the present invention is equipped with multiple mechanisms, so it is stable and reliable. Even when the vehicle is moving at high speed and under violent vibration, it can firmly restrain the first-stage collapse box.

[0064] With the pop-out two-stage crumple zone of this invention, the installation, connection method, and strength of the bumper, grille, car lights, etc., driven by the anti-collision beam that pops out with the first-stage crumple zone need to be adjusted accordingly, so that the first-stage crumple zone can drive the anti-collision beam to pop out smoothly.

[0065] The pop-out two-stage crumple zone of this invention can be used for safety protection at the rear of a vehicle. The front baffle 3 is connected to the rear anti-collision beam, and the rear baffle 4 is connected to the vehicle body. This can greatly reduce the damage caused by a rear-end collision and also greatly reduce the damage to the vehicle behind.

[0066] This invention relates to a pop-out two-stage collapse box for elevator fall safety. A preferred explosive device 10 provides the power for the first-stage collapse box to pop out, and the explosive device 10 is placed inside the cavity of the two-stage collapse box. The pop-out two-stage collapse boxes can be installed at the four corners or two opposite corners of the elevator bottom, or a single large pop-out two-stage collapse box can be installed at the bottom of the elevator. Distance sensors, speed monitoring devices, the detonation device, and its control system are installed at the bottom of the elevator or other suitable locations, and are powered by the elevator's power supply system.

[0067] To ensure power supply safety, an independent power supply system is installed. Its main component is a rechargeable emergency power supply, which is automatically charged by the elevator power supply system or directly powered by batteries. This independent power supply system, along with the elevator's power supply system, provides power to the distance sensor, speed monitoring device, detonation device, and its control system, ensuring power supply in case of elevator malfunction and power supply system failure. When the elevator falls out of control and, at a preset distance from the bottom of the elevator shaft, the speed exceeds a set danger threshold, the control system triggers the detonation device. The high-pressure gas generated by the explosion ejects the first-stage collapse box. During the collision with the bottom of the elevator shaft, both collapse boxes collapse together to absorb energy, and the high-pressure gas inside both collapse boxes is also compressed and participates in energy absorption.

[0068] Compared to the commonly used spring-loaded shock absorption device at the bottom of elevators, the pop-out two-stage collapse box device of this invention has a larger energy absorption stroke. At the same time, the high-pressure gas is compressed and absorbed, making the collision smoother and providing better protection for the people inside the elevator and the elevator itself.

[0069] This invention addresses elevator fall safety. The two-stage collapsible box ejection can also utilize a spring and electromagnet scheme. The device providing the ejection power for the first-stage collapsible box, along with the limiting and locking mechanism, can consist of a spring, a solenoid valve, a latch and latch seat, and a control system. One end of the spring connects to the first-stage collapsible box, and the other end connects to the second-stage collapsible box or the elevator body. The latch seat is mounted on the elevator body or the second-stage collapsible box, and the latch is mounted on the first-stage collapsible box. The moving iron core of the solenoid valve connects to the latch. When a collision is imminent, the control system energizes the solenoid valve, causing the moving iron core to push the latch away from the latch seat. The spring then ejects the first-stage collapsible box. During the collision, both stages of the collapsible box collapse together to absorb energy. The solenoid valve and control system are powered by the elevator power supply system described above and an additional independent power supply system, which are also powered simultaneously. Using this scheme, the elevator has a longer energy absorption stroke, significantly reducing the impact energy experienced by passengers inside.

[0070] The first-stage collapse box wall 1, the front baffle 3, and the rear cover plate 5 are made of aluminum alloy and are welded together using friction stir welding. Similarly, the second-stage collapse box wall 2, the tail baffle 4, and the connecting ring 6 are also made of aluminum alloy and are welded using friction stir welding. Friction stir welding melts and stirs two contact surfaces together through high-temperature friction, increasing the weld strength by 30% to 50% compared to ordinary welding.

Claims

1. A pop-out two-stage collapse box, comprising a first-stage collapse box consisting of a first-stage collapse box wall (1) and a front baffle (3), a second-stage collapse box consisting of a second-stage collapse box wall (2) and a tail baffle (4), a limiting and locking mechanism, and a device for providing pop-out power for the first-stage collapse box, wherein the front baffle (3) and the tail baffle (4) can simultaneously serve as mounting plates, characterized in that: Under normal circumstances, the main body of the first-stage collapse box is located inside the second-stage collapse box. When a collision is about to occur, the first-stage collapse box pops out from the second-stage collapse box. During the collision, both stages of the collapse box collapse and absorb energy.

2. The pop-out two-stage crumple zone according to claim 1, wherein the device providing the pop-out power for the first-stage crumple zone is an explosive device (10), installed in the inner cavity of the two-stage crumple zone; or installed in a high-pressure resistant tank, with a high-pressure gas pipe connecting the high-pressure resistant tank and the inner cavity at the end of the second-stage crumple zone via a one-way valve, and installed on the vehicle body near the outside of the two-stage crumple zone, connected to the vehicle control system by a detonation signal line and / or a wireless detonation device, characterized in that: When the vehicle detects that a collision is about to occur, the control system detonates the explosive device (10). The high-pressure gas generated by the explosion pushes the first-stage crumple box out and is compressed and absorbs energy along with the collapse of the two-stage crumple boxes.

3. The pop-out two-stage collapse box according to claim 1, wherein the device providing the pop-out power for the first-stage collapse box comprises a high-pressure air tank mounted on the vehicle body, a gas distribution valve, a one-way valve, etc., and a high-pressure air pipe connects the inner cavity at the end of the second-stage collapse box and the high-pressure air tank through the gas distribution valve and the one-way valve, characterized in that: When a collision is imminent, the vehicle control system opens the valve corresponding to the gas distribution valve. The high-pressure gas stored in the high-pressure gas tank enters the inner cavity of the two-stage crumple zone through the high-pressure gas pipe and the one-way valve, pushing the first-stage crumple zone out and being compressed and absorbing energy as the two-stage crumple zone collapses.

4. The pop-out two-stage crumple zone according to claim 1, wherein the device for providing the pop-out power of the first-stage crumple zone comprises a cylinder, a high-pressure air tank mounted on the vehicle body, a gas distribution valve, etc., wherein the piston rod of the cylinder is connected to the first-stage crumple zone, and the cylinder body is mounted on the vehicle body near the two-stage crumple zone, characterized in that: When a collision is about to occur, the vehicle control system opens the valve corresponding to the gas distribution valve, releasing a certain amount of high-pressure gas stored in the high-pressure gas tank mounted on the vehicle body into the cylinder, pushing the piston rod of the cylinder forward and causing the first-stage collapsible box to pop out.

5. The pop-out two-stage collapsible box according to claim 1, wherein the limiting and locking mechanism and the device for providing the pop-out power of the first-stage collapsible box are composed of a spring, a solenoid valve, a buckle, and a buckle seat, etc., one end of the spring is connected to the first-stage collapsible box, and the other end is connected to the second-stage collapsible box or the vehicle body, the buckle seat is installed on the vehicle body or the second-stage collapsible box, the buckle is installed on the first-stage collapsible box, and the moving iron core of the solenoid valve is connected to the buckle, characterized in that: Under normal conditions, the spring is restricted within its elastic deformation range by the latch and the latch seat, and the first-stage collapse box body is together restricted within the second-stage collapse box; When a collision is about to occur, the vehicle control system energizes the solenoid valve, the moving iron core of the solenoid valve pushes the latch and the latch seat to separate, and the spring causes the first-stage collapsible box to pop out.

6. The pop-up two-stage collapse box according to claim 1, wherein the first-stage collapse box cylinder wall (1) and the second-stage collapse box cylinder wall (2) are provided with multiple collapse grooves (7), characterized in that: The two-stage collapse box using the collapse groove (7) can form a sealed inner cavity before and after the first stage collapse box is ejected, thus sealing the high-pressure gas inside. When a collision occurs, the collapse of the two-stage collapse box begins with the collapse groove (7), and then a rupture occurs, high-pressure gas is released, and the collapse continues until it is complete.

7. The pop-up two-stage collapse box according to claim 1, wherein the front baffle (3) and / or the tail baffle (4) and the cylindrical wall of the two-stage collapse box are drilled and milled with one or more non-permeable blind holes (15), or the blind holes (15) are directly drilled and milled into permeable holes and sealed with rubber plugs or the like, characterized in that: During the collision and collapse process, the high-pressure gas that pushes the first-stage collapse box out is further compressed. When the gas pressure rises to a certain level, the high-pressure gas bursts through the blind hole (15) or squeezes out the rubber plug that seals the through hole and is released, so that the collapse of the two-stage collapse box can be carried out thoroughly.

8. According to claim 1, the pop-out two-stage collapse box has multiple recessed grooves (8) on the outer side of the first-stage collapse box cylinder wall (1) along the pop-out direction, and a rear cover plate (5) is installed at its rear end. The rear cover plate (5) has many holes, and each edge of the front side is chamfered as a slope surface; the second-stage collapse box cylinder wall (2) has multiple pin holes (9) near the front end, and a connecting ring (6) is installed at the front end. The connecting ring (6) has multiple protrusions that match and correspond to the recessed grooves (8); the limiting and locking mechanism (11) of the two-stage collapse box includes: The casing (12), pin (13), and compression spring (14) are characterized by the following: the top of the pin (13) is an arc shape that matches the collapse groove (7), the ends have protrusions on both sides, and the middle part of the end has multiple holes for inserting the compression spring (14). The pin (13) is characterized by the following: under normal conditions, the pin (13) is inserted into the pin hole (9) and pressed against the collapse groove (7) of the first-stage collapse box, confining the first-stage collapse box within the second-stage collapse box. When a collision is about to occur, the high pressure generated by the explosion... Gas or high-pressure gas from the high-pressure gas storage tank instantly fills the cavity inside the two-stage collapse box through the hole in the rear cover plate (5). The first-stage collapse box pops out along the protrusion of the connecting ring (6) along the recessed groove (8). The pin (13) goes over the slope of the rear cover plate (5). The protrusion of the connecting ring (6) blocks the rear cover plate (5). The pin (13) pops out inward under the action of the compression spring (14) and locks the first-stage collapse box.

9. According to claim 1, the first-stage collapse box cylinder wall (1), the front baffle (3) and the rear cover plate (5) are made of aluminum alloy and are welded together by friction stir welding. Similarly, the second-stage collapse box cylinder wall (2), the tail baffle (4) and the connecting ring (6) are made of aluminum alloy and are all welded by friction stir welding.

Images