An aluminum alloy honeycomb material-filled encapsulated anti-climb device

Abstract

This utility model discloses an aluminum alloy honeycomb material-filled, encapsulated anti-climb device, including anti-climb teeth, guide tubes, flange seats, honeycomb energy-absorbing elements, and thin-walled skin. One end of the guide tube is welded to the inner side of the anti-climb teeth, and the other end of the guide tube is inserted into the central hole of the flange seat and welded together. A honeycomb energy-absorbing element is sleeved on the guide tube, and a thin-walled skin is wrapped around the honeycomb energy-absorbing element, which is bent into a wave shape. The thin-walled skin and the aluminum honeycomb energy-absorbing element absorb collision kinetic energy through plastic deformation. When the honeycomb material of this utility model is subjected to axial compression, it will undergo stable, layer-by-layer plastic buckling deformation. This process of converting kinetic energy into deformation energy (thermal energy) is highly efficient, with a specific energy absorption much higher than that of traditional rigid steel structures. It has high energy absorption efficiency and stable impact fluctuations. Moreover, the thin-walled skin, due to its wave shape, can stably absorb a portion of the energy. In addition, this utility model has a compact size and is easy to install.

Description

Technical Field

[0001] This utility model belongs to the field of rail vehicle technology and relates to an anti-climb device, specifically an encapsulated anti-climb device with an aluminum alloy honeycomb material filling structure. Background Technology

[0002] Urban rail transit, with its high speed and large passenger capacity, has become the preferred mode of transportation for the public. While bringing convenience, the safety hazards of rail transit accidents have become an issue that cannot be ignored. While improving the reliability of active vehicle control, passive safety protection is also receiving increasing attention. The energy absorption of the train's front end is crucial for safety protection in the event of an accidental collision.

[0003] Passive safety protection technology refers to converting the impact energy of a vehicle into the plastic deformation energy of passive protective devices, thereby protecting the passenger area of ​​the car body from large deformation or structural damage, minimizing the extent of accident damage, and reducing personal injury. In existing technologies, the energy-absorbing devices used in passive protection technology for urban rail vehicles mainly include couplers, anti-creep devices, and energy-absorbing zones in the car body. In the event of an unavoidable collision, the anti-creep device is the first energy-absorbing device to activate. At the moment of impact, it not only absorbs and dissipates the kinetic energy of the vehicle's front end and mitigates the impact load, but also prevents the train from creeping and overturning through the meshing of anti-creep teeth, maximizing the safety of personnel.

[0004] Most existing honeycomb energy-absorbing anti-climb devices employ either drawer-type collision energy absorption or a multi-stage energy-absorbing element system solution. While drawer-type anti-climb devices can meet the energy absorption stability requirements, their structural design limits their effectiveness. During collision energy absorption, the rear guide profile must completely accommodate the front sliding profile, resulting in a relatively large rear guide profile that occupies a significant amount of space behind the coupler. Furthermore, drawer-type honeycomb anti-climb devices suffer from drawbacks such as a large number of components and cumbersome installation. Similarly, existing multi-stage energy-absorbing element anti-climb devices also suffer from drawbacks such as a large number of components and cumbersome installation.

[0005] Therefore, how to achieve stable energy absorption, simple and efficient installation, and save internal installation space of the coupler have become the urgent problems that need to be solved for the anti-climb device. Summary of the Invention

[0006] In view of the shortcomings and defects of the existing technology, the purpose of this utility model is to provide a covered anti-climb device with an aluminum alloy honeycomb material filling structure. It uses aluminum honeycomb as the energy-absorbing element and is covered with a skin. The structure is simple and novel, the size is small, the installation is convenient, and the working force is stable.

[0007] To achieve the above or other objectives, the technical solution of this utility model is as follows: An aluminum alloy honeycomb material-filled encapsulated anti-climb device includes anti-climb teeth, a guide tube, a flange seat, a honeycomb energy-absorbing element, and a thin-walled skin. One end of the guide tube is welded and fixed to the inner side of the anti-climb teeth, and the other end of the guide tube is inserted into the central hole of the flange seat and can be detachably fixed (and connected by welding). The honeycomb energy-absorbing element is sleeved on the guide tube, and the honeycomb energy-absorbing element is covered with a thin-walled skin, which is bent into a wavy shape. The thin-walled skin and the aluminum honeycomb energy-absorbing element absorb collision kinetic energy through plastic deformation.

[0008] Furthermore, the bending angle of the thin-walled skin is set to 20°~30°; the thin-walled skin is a stainless steel plate with a thickness of no more than 2mm.

[0009] Furthermore, the circumferential gap between the thin-walled skin and the honeycomb energy-absorbing element is not less than 12mm.

[0010] Furthermore, the two ends of the thin-walled skin are welded to the flange seat and the anti-climb teeth, respectively, to isolate the honeycomb energy-absorbing element from the outside air.

[0011] Furthermore, the honeycomb energy-absorbing element is a thin-walled honeycomb columnar structure, with the honeycombs being stacked in a regular and orderly manner.

[0012] Furthermore, the honeycomb energy-absorbing element is an integrated honeycomb core structure, made of stacked aluminum foil with a thickness of no more than 0.2 mm.

[0013] Furthermore, the other end of the guide tube is sealed by welding with a sealing plate.

[0014] Furthermore, the flange seat is provided with threaded holes around its perimeter, and is connected to the vehicle coupler beam by fastening screws.

[0015] Furthermore, a gap of less than or equal to 5 mm is provided between the guide tube and the honeycomb energy-absorbing element on one side.

[0016] Furthermore, the weld penetration depth at the connection between the guide tube and the anti-climbing tooth is not less than 15mm.

[0017] This utility model has the following advantages: Compared with existing anti-climb device manufacturing technology, the biggest feature of this utility model is that: (a) when the aluminum honeycomb material is subjected to axial pressure, it will undergo stable, layer-by-layer plastic buckling deformation. This process of converting kinetic energy into deformation energy (thermal energy) is very efficient. Its specific energy absorption (energy absorbed per unit mass) is much higher than that of traditional rigid steel structures. It has high energy absorption efficiency and stable impact fluctuations; (b) because the thin-walled skin is bent into a wave shape, it can not only stably absorb a part of the energy, but also ensure the overall energy absorption stability.

[0018] This invention also greatly saves installation space at the end of the vehicle body by reducing the structural size of the device (the overall length of the anti-climb device is 485±2mm and the overall width is 200±2mm), simplifies the vehicle body structure design, and makes the installation structure simple, avoiding the complexity of installing multiple independent devices (such as independent anti-climb devices and energy-absorbing tubes).

[0019] In summary, this utility model perfectly integrates the two major functional modules of anti-climbing and energy absorption into a compact device, solving the problem of insufficient energy absorption in traditional anti-climbing devices. At the same time, by utilizing the high energy absorption characteristics of aluminum honeycomb material, it can absorb huge collision energy with a very light weight and a small space, and the energy absorption process is stable and controllable.

[0020] The vast majority of urban rail transit vehicles in China still use outdated anti-creep energy-absorbing devices. This utility model, with its novel design and reliable structure, represents not only an innovation in the product itself but also a significant leap forward in the passive safety design philosophy of rail vehicles. It has become an indispensable core safety component for modern high-standard rail trains. The successful development of this product structure provides a valuable reference for the production of similar models in the future. Attached Figure Description

[0021] Figure 1 This is an exploded structural diagram of the present invention; Figure 2 This is an assembly structure diagram of this utility model; Figure 3 This is an axial sectional view of the present invention; Figure 4 This is a schematic diagram of an aluminum honeycomb energy-absorbing element; Figure 5 for Figure 4 A magnified view of a portion of the image; Among them, 1-flange seat, 2-thin-walled skin, 3-aluminum honeycomb energy-absorbing element, 4-guide tube, 5-anti-climbing tooth, 6-fastening bolt, 7-threaded plate, 8-sealing plate, 9-weld. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0023] Reference Figures 1 to 3 As shown, the aluminum alloy honeycomb material-filled anti-climb device of this embodiment includes a flange seat 1, a guide tube 4, anti-climb teeth 5, a thin-walled skin 2, and an aluminum honeycomb energy-absorbing element 3.

[0024] Among them, the flange seat 1, guide tube 4, and anti-climb teeth 5 are made of Q345 carbon steel.

[0025] The flange seat 1 is used to fix the anti-climb device to the vehicle coupler beam. The flange seat 1 has through holes around its perimeter for installing fastening bolts 6 to connect to the vehicle body (vehicle coupler beam). A center hole is provided in the center of the flange seat 1 for installing the guide tube 4.

[0026] The thin-walled skin 2 is made of four stainless steel bent thin plates welded together. Each bent thin plate is bent from a flat plate into a wave shape. The thin-walled skin 2 is used to cover the aluminum honeycomb energy-absorbing element 3. The two ends of the thin-walled skin 2 are respectively welded to the flange seat 1 and the anti-climbing tooth 5. This can not only ensure the structural strength, but also isolate the aluminum honeycomb energy-absorbing element 3 from the outside air, ensuring that the aluminum honeycomb energy-absorbing element 3 is not affected by the external environment.

[0027] The thin-walled skin 2 is bent into a wavy shape, with the bending angle controlled between 20° and 30°. A bending angle that is too small or too large will increase instability during a collision, preventing the thin-walled skin 2 from deforming under pressure in a regular manner. This results in large fluctuations in the steady-state force value, failing to meet the product's force performance stability requirements. Therefore, the bending angle of the thin-walled skin 2 must be controlled within an effective range according to product requirements.

[0028] When a train collision occurs, the thin-walled skin 2 and the aluminum honeycomb energy-absorbing element 3 will simultaneously crush and absorb energy (both undergo plastic deformation to convert and absorb the collision kinetic energy). In this embodiment, the thin-walled skin 2 will also generate a force value during the collision. Therefore, the steady-state force value of the encased anti-climb device consists of two parts: one is the energy absorbed by the plastic deformation of the aluminum honeycomb energy-absorbing element 3, and the other is the energy absorbed by the energy absorbed by the crushing deformation of the thin-walled skin 2. Preferably, to ensure that the fluctuation of the steady-state force value is no greater than 7.5%, the crushing stability of the thin-walled skin 2 needs to be considered. The thin-walled skin 2 is made of stainless steel plate with a thickness of no more than 2mm, which can reasonably and effectively bear the energy absorption while meeting the requirement that the steady-state force is no greater than 7.5%.

[0029] In this embodiment, the circumferential gap between the thin-walled skin 2 and the aluminum honeycomb energy-absorbing element 3 is not less than 12mm. If the circumferential gap is too small, when the anti-climb device collides, the aluminum honeycomb energy-absorbing element 3 will be crushed and contracted, increasing its cross-section, while the thin-walled skin 2 will be compressed and contracted, decreasing its cross-section. The two will interfere with each other and generate friction, resulting in unstable force value of the anti-climb device.

[0030] Among them, the aluminum honeycomb energy-absorbing element 3 is a thin-walled honeycomb columnar structure, with the honeycombs stacked in a regular and orderly manner (corrugated). When a train collides, it absorbs the kinetic energy generated by the impact of the vehicle through its own plastic deformation.

[0031] The aluminum honeycomb energy-absorbing element 3 is the core of this utility model. The energy absorption effect of this enclosed anti-climb energy-absorbing device largely depends on the structure and strength of the aluminum honeycomb energy-absorbing element 3.

[0032] Unlike other anti-climb energy absorbers, the aluminum honeycomb energy-absorbing element 3 provided by this utility model is an integrated honeycomb core structure, made of aluminum foil with a thickness of no more than 0.2mm stacked together. The basic materials are aluminum foil 3003, 5052, etc. Its energy absorption efficiency can fully meet the energy absorption requirements of the anti-climb energy-absorbing device, and it also has the advantages of good stability and light weight.

[0033] Among them, the guide tube 4 is used to connect the flange seat 1 and the anti-climbing tooth 5, and at the same time ensure the vertical and lateral load capacity of the anti-climbing device. At the moment of the train collision, the connection weld 9 between the guide tube 4 and the flange seat 1 is broken. At the same time as the aluminum honeycomb energy-absorbing element 3 and other components are crushed and deformed, the guide tube 4 passes through the flange seat 1 and is displaced backward.

[0034] One end of the guide tube 4 is welded to the anti-climbing tooth 5. The shaft of the guide tube 4 is provided with an aluminum honeycomb energy-absorbing element 3 and a thin-walled skin 2 from the inside to the outside. The other end of the guide tube 4 is welded to the flange seat 1 (and the end of the other end of the guide tube 4 is provided with a sealing plate 8. After the sealing plate 8 is installed into the inner cavity of the guide tube 4, it is welded and fixed to seal the inner cavity of the guide tube 4 and prevent dust and other foreign objects from entering).

[0035] In this embodiment, the guide tube 4 and the aluminum honeycomb energy-absorbing element 3 must maintain a gap of less than or equal to 5mm on one side (for example, if the outer diameter of the guide tube is 70mm, the mounting hole of the honeycomb energy-absorbing element must be machined to a diameter of 80mm). During the collision deformation process of the anti-climb device, if the assembly gap between the two is too small, it will cause friction between the honeycomb energy-absorbing element 3 and the guide tube 4, affecting the steady-state force value of the anti-climb device.

[0036] Among them, the front end of the anti-climb tooth 5 has a tooth shape, which engages when the train collides to prevent the vehicle from climbing (the front end of the anti-climb tooth 5 is used to engage with another anti-climb tooth when the train collides, and guides the car body to make a horizontal impact through the guide structure of the anti-climb tooth, so as to avoid the train from being subjected to a large load in the vertical direction during the collision, which would cause accidents such as the train climbing, overturning, etc.).

[0037] In this embodiment, the weld penetration depth at the connection between the anti-climbing tooth 5 and the guide tube 4 must be no less than 15mm. When the train collision teeth are subjected to force, the guide tube 4 not only plays a guiding role, but also needs to meet the vertical and lateral load requirements. If the weld penetration depth is insufficient, it will lead to low welding strength between the guide tube 4 and the anti-climbing tooth 5, and the weld may crack or even fall off under eccentric load during the collision.

[0038] The installation process of the aluminum alloy honeycomb material-filled anti-climb device in this embodiment is as follows: First, the anti-climbing tooth 5, flange seat 1 and guide tube 4 are machined respectively; Install one end of the guide tube 4 at the center of the plane of the anti-climb tooth 5 and complete the welding; The thin-walled skin 2 is processed and welded together (the thin-walled skin 2 is made of four stainless steel bent thin plates welded together). The aluminum honeycomb energy-absorbing element 3 and the thin-walled skin 2 are successively put on the guide tube (the aluminum honeycomb energy-absorbing element 3 is inserted from the other end of the guide tube 4, ensuring that the end face of the aluminum honeycomb energy-absorbing element 3 is in contact with the end face of the anti-climb tooth 5; the thin-walled skin 2 is put on the outside of the aluminum honeycomb energy-absorbing element 3, and at the same time, one end of the thin-walled skin 2 is in contact with the end face of the anti-climb tooth 5).

[0039] The guide tube 4 is inserted into the center hole of the flange seat 1 and fixed by welding; then the sealing plate 8 is welded to the round hole at the end of the guide tube 4 to seal it.

[0040] Finally, the aluminum alloy honeycomb material-filled anti-climb device of this embodiment is assembled onto the vehicle using fastening bolts 6 and threaded plates 7.

[0041] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model. Technologies not covered by this utility model can be implemented by existing technologies.

Claims

1. A cladding anti-creep device for an aluminum alloy honeycomb- filled structure, characterized by: The encapsulated anti-climb device includes anti-climb teeth, a guide tube, a flange seat, a honeycomb energy-absorbing element, and a thin-walled skin. One end of the guide tube is welded and fixed to the inner side of the anti-climb teeth, and the other end of the guide tube is inserted into the central hole of the flange seat and can be detachably fixed. A honeycomb energy-absorbing element is sleeved on the guide tube, and a thin-walled skin is wrapped around the honeycomb energy-absorbing element. The thin-walled skin is bent into a wavy shape. The thin-walled skin and the aluminum honeycomb energy-absorbing element absorb collision kinetic energy through plastic deformation.

2. An overwrap anti-creeper for an aluminum alloy honeycomb- filled structure as defined in claim 1, characterized in that: The bending angle of the thin-walled skin is set to 20°~30°; the thin-walled skin is a stainless steel plate with a thickness of no more than 2mm.

3. The aluminum alloy honeycomb material-filled anti-climb device as described in claim 1, characterized in that: The gap between the thin-walled skin and the periphery of the honeycomb energy-absorbing element is not less than 12mm.

4. The aluminum alloy honeycomb material-filled anti-climb device as described in any one of claims 1-3, characterized in that: The two ends of the thin-walled skin are welded to the flange seat and the anti-climb teeth, respectively, to isolate the honeycomb energy-absorbing element from the outside air.

5. The aluminum alloy honeycomb material-filled anti-climb device as described in any one of claims 1-3, characterized in that: The honeycomb energy-absorbing element is a thin-walled honeycomb columnar structure, with the honeycombs being stacked in a regular and orderly manner.

6. The encapsulated anti-climb device with an aluminum alloy honeycomb material filling structure as described in claim 5, characterized in that: The honeycomb energy-absorbing element is an integrated honeycomb core structure, made of stacked aluminum foil with a thickness of no more than 0.2 mm.

7. The aluminum alloy honeycomb material-filled anti-climb device according to any one of claims 1-3, characterized in that: The other end of the guide tube is sealed by welding a sealing plate.

8. The aluminum alloy honeycomb material-filled anti-climb device according to any one of claims 1-3, characterized in that: The flange seat is provided with threaded holes around its perimeter and is connected to the vehicle coupler beam by fastening screws.

9. The aluminum alloy honeycomb material-filled anti-climb device according to any one of claims 1-3, characterized in that: The guide tube and the honeycomb energy-absorbing element are provided with a gap of less than or equal to 5 mm on one side.

10. The aluminum alloy honeycomb material-filled anti-climb device according to any one of claims 1-3, characterized in that: The weld penetration depth at the connection between the guide tube and the anti-climbing tooth is not less than 15mm.

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