Installation Structure of a Low Pre-tightening Force Anti-climbing Energy Absorbing Device

Abstract

The present invention discloses an installation structure of a low pre-tightening anti-climbing energy absorption device, which includes a vehicle body end structure. On one side of the vehicle body end structure, there is an anti-climbing energy absorption device, and the vehicle body end structure and the anti-climbing energy absorption device are connected by fasteners. In the middle of one side of the vehicle body end structure, there is an anti-slip groove, and the anti-slip groove cooperates with the anti-climbing energy absorption device. The anti-slip groove cooperates with an anti-slip groove block, and both the anti-slip groove and the anti-slip groove block are triangular. Through the cooperation of the anti-slip groove and the anti-slip groove block, the present invention makes the anti-climbing energy absorption device form a biting structure similar to a thread after installation. The biting structure bears the shear force generated by the vertical load on the contact surface during train climbing and overlapping, thereby reducing the demand for the frictional force on the contact surface. Further, the pre-tightening force of the installation can be reduced, and the biting structure can effectively resist the vertical shear force along the contact surface, thereby facilitating the selection of smaller-sized fasteners and reducing the installation difficulty.

Description

Technical Field

[0001] The present invention relates to the technical field of passive safety protection for rail transit vehicles, and more specifically, to an installation structure for a low-preload anti-climbing energy-absorbing device. Background Art

[0002] With the rapid development of China's rail transit industry, higher requirements have been put forward for train passive safety protection technology. To effectively absorb the energy during train collisions, most existing technologies adopt a systematic solution of multi-stage energy absorption, and the anti-climbing energy-absorbing device is an important part of this system solution. In existing technical solutions, efforts are mainly focused on improving the energy absorption capacity and stability of the anti-climbing energy-absorbing device. The installation with the car body structure still uses plane contact. To meet the requirements of the standard for vertical loads, the selected fastener specifications are too large, resulting in difficult installation and easy crushing of car body components. Therefore, there is an urgent need for an installation structure for a low-preload anti-climbing energy-absorbing device.

[0003] For example, Chinese Patent CN103287450A discloses an assembly method for an anti-climbing energy-absorbing device of a subway train, including welding and connecting an energy-absorbing tube and a guide rod between a mounting seat and anti-climbing teeth. There are guide tubes on the mounting seat and the end structure of the car body, which has the characteristics of good directivity and light weight. However, the anti-climbing energy-absorbing device in the above assembly method of the subway train anti-climbing energy-absorbing device uses plane contact with the end structure of the car body, and only resists vertical loads through the friction force between the contact surfaces, resulting in poor vertical load-bearing capacity.

[0004] Another example is that Chinese Patent CN105966416A discloses a train energy-absorbing anti-climbing device, including a steel plate, threaded holes, an anti-climbing device, etc. The installation seat guide holes connected to the car body integrate cutting knives for cutting and crushing tubes through primary crushing energy absorption and secondary cutting energy absorption, improving the energy absorption capacity of the anti-climbing energy-absorbing device. However, the connection with the car body still uses plane contact. If the selected fastener specifications for the installation of the anti-climbing energy-absorbing device are small, the installation preload is small, resulting in a small friction force between the contact surfaces, unable to resist the vertical load caused by train climbing and overlapping, causing the connection structure of the anti-climbing energy-absorbing device to fail and thus losing the passive safety protection function.

[0005] As can be seen from the above patent, although the existing anti-climbing energy-absorbing device has the functions of preventing vehicles from climbing on top of each other and absorbing impact energy, in order to prevent trains from climbing on top of each other during a collision, the structure bears the vertical force on the contact surface between the anti-climbing energy-absorbing device and the end frame structure of the car body caused by the mutual climbing after the train collision, which greatly affects the stability of the anti-climbing energy-absorbing device after installation. The anti-climbing energy-absorbing device and its installation structure require strong vertical load-bearing capacity. At the same time, on the premise that the anti-climbing energy-absorbing device itself has sufficient stiffness, a large frictional force needs to be provided at the installation contact surface between the anti-climbing energy-absorbing device and the car body structure to resist the vertical load generated by the train gravity. To ensure sufficient frictional force, large-sized fasteners need to be selected. However, large-sized fasteners have a large installation torque and a large installation pre-tightening force provided by them. Therefore, the problem that the connected parts are easily crushed is likely to occur. At the same time, the large installation torque makes the installation more difficult. And to ensure that the contact surface between the anti-climbing energy-absorbing device and the end structure of the car body reaches sufficient frictional force, it is necessary to select larger-sized fasteners. Large-sized fasteners have a large pre-tightening force, which also leads to greater difficulty in on-site installation of large-sized fasteners, greatly affecting the installation efficiency.

[0006] In response to the problems in the related art, no effective solution has been proposed yet. Summary of the Invention

[0007] In response to the problems in the related art, the present invention proposes an installation structure for a low-preload anti-climbing energy-absorbing device to overcome the above-mentioned technical problems existing in the existing related art.

[0008] Therefore, the specific technical solution adopted by the present invention is as follows:

[0009] An installation structure for a low-preload anti-climbing energy-absorbing device, including an end structure of a car body. On one side of the end structure of the car body, there is an anti-climbing energy-absorbing device, and the end structure of the car body and the anti-climbing energy-absorbing device are connected by fasteners. The anti-slip groove of the end structure of the car body can be extruded together with the profile, or can be obtained by welding a flat plate with an anti-slip groove.

[0010] Furthermore, in order to facilitate the end structure of the car body to limit and fix the installed anti-climbing energy-absorbing device, an anti-slip groove is provided in the middle of one side of the end structure of the car body, and the anti-slip groove is matched with the anti-climbing energy-absorbing device.

[0011] Furthermore, to facilitate the installation and fixation of the anti-climbing energy-absorbing device and improve the stability after installation, the anti-climbing energy-absorbing device includes a mounting seat provided on one side of the end structure of the vehicle body. A mounting plane is provided on the side of the mounting seat close to the end structure of the vehicle body. A number of anti-slip groove blocks are provided on the mounting plane. A guiding hole is provided in the middle of the mounting seat. An energy-absorbing element is provided in the middle of the guiding hole. A guiding structure is provided at one end of the energy-absorbing element close to the mounting seat. An anti-climbing tooth is provided at the other end of the energy-absorbing element. The energy-absorbing element uses a honeycomb core. The guiding hole provides support and guiding functions for the energy-absorbing element. When the energy-absorbing element uses an expansion tube type, the cross-sectional dimension of the used expansion tube is larger than the dimension of the guiding hole. The expansion tube undergoes plastic deformation when passing through the guiding hole to absorb the impact energy of the train. The guiding hole also provides a guiding function for the energy-absorbing element. When the energy-absorbing element uses a planing type, a cutting tool can be installed in front of the mounting seat to cut the energy-absorbing element. The guiding hole also provides a guiding function for the energy-absorbing element. The mounting plane and the anti-slip groove blocks are obtained by machining. If the mounting seat uses an aluminum alloy profile, the anti-slip groove blocks are extruded together with the profile.

[0012] Furthermore, to facilitate the connection between the anti-slip groove and the anti-slip groove block, the anti-slip groove cooperates with the anti-slip groove block. Both the anti-slip groove and the anti-slip groove block are triangular. The radius of the rounded corner at the top of the protruding anti-slip groove block is larger than the radius of the bottom of the anti-slip groove. The anti-climbing energy-absorbing device is applicable to use honeycomb core, expansion tube type, and planing type energy-absorbing elements. When the anti-climbing energy-absorbing device uses a honeycomb core type energy-absorbing element, the mounting seat uses carbon steel or aluminum alloy, and a hole is provided in the middle to provide support and guiding functions for the energy-absorbing element. When the anti-climbing energy-absorbing device uses an expansion tube type, the mounting seat uses carbon steel, a hole is provided in the middle, and it is used for the plastic deformation of the expansion tube energy-absorbing element and provides a guiding function at the same time. When the anti-climbing energy-absorbing device uses a planing type, a cutting tool is installed in front of the mounting seat to cut the energy-absorbing element. When both the anti-slip groove block and the anti-slip groove are triangular, the radius of the rounded corner at the top of the triangle protrusion is larger than the radius of the bottom of the groove. The anti-slip groove block can be designed on the anti-climbing device mounting surface, and the anti-slip groove can be designed on one side of the vehicle body end structure. The anti-slip groove block and the anti-slip groove are used in cooperation, and the profiles of the anti-slip groove block and the anti-slip groove can be semi-circular, or the anti-slip groove block and the anti-slip groove can be square-shaped.

[0013] Further, to facilitate the connection and fixation of the vehicle body end structure to the anti-climbing energy absorption device using fixing parts during use, holes are provided on the inner side of the vehicle body end structure, connection holes are provided in the middle of the vehicle body end structure, and the connection holes cooperate with the guiding structure. Threaded holes are provided at the four corners of the mounting seat, and mating holes are provided at the four corners of the anti-slip groove, and the mating holes correspond to the threaded holes. The fastener includes a bolt and a nut. The threaded hole and the mating hole are connected by the fastener, and the nut is located inside the hole. Smaller-sized fasteners are selected to reduce the installation difficulty, and the installation structure is applicable to anti-climbing energy absorption devices using honeycomb core, expansion tube type, and planing type energy absorption elements. If the anti-climbing energy absorption device uses a honeycomb core type energy absorption element, the mounting seat can be made of carbon steel or aluminum alloy with holes in the middle to provide support and guidance for the energy absorption element housing; if the anti-climbing energy absorption device uses the expansion tube type, the mounting seat is made of carbon steel with holes in the middle for the plastic deformation of the expansion tube energy absorption element and to provide guidance at the same time. If the anti-climbing energy absorption device uses the planing type, a cutting tool can be installed in front of the mounting seat to cut the energy absorption element.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. Through the cooperation of the anti-slip groove and the anti-slip groove block, the present invention enables the anti-climbing energy absorption device to form a biting structure similar to a thread after installation. The biting structure bears the shear force generated by the vertical load on the contact surface during train climbing and stacking, thereby reducing the requirement for the frictional force on the contact surface. Further, the pre-tightening force of the installation can be reduced, and the biting structure can effectively resist the vertical shear force along the contact surface, thus facilitating the selection of smaller-sized fasteners and reducing the installation difficulty.

[0016] 2. The installation structure provided by the present invention is applicable to anti-climbing energy absorption devices using honeycomb core, expansion tube type, and planing type energy absorption elements. If the anti-climbing energy absorption device uses a honeycomb core type energy absorption element, the mounting seat can be made of carbon steel or aluminum alloy with holes in the middle to provide support and guidance for the energy absorption element housing; if the anti-climbing energy absorption device uses the expansion tube type, the mounting seat is made of carbon steel with holes in the middle for the plastic deformation of the expansion tube energy absorption element and to provide guidance at the same time. If the anti-climbing energy absorption device uses the planing type, a cutting tool can be installed in front of the mounting seat to cut the energy absorption element, thereby greatly improving the applicable range of the present invention. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1Schematic diagram of the installation structure of a low pre-tightening anti-climbing energy-absorbing device according to an embodiment of the present invention;

[0019] Figure 2 Partial structure schematic diagram one of the installation structure of a low pre-tightening anti-climbing energy-absorbing device according to an embodiment of the present invention;

[0020] Figure 3 Partial structure schematic diagram two of the installation structure of a low pre-tightening anti-climbing energy-absorbing device according to an embodiment of the present invention;

[0021] Figure 4 Schematic diagram of the vehicle body end structure of the installation structure of a low pre-tightening anti-climbing energy-absorbing device according to an embodiment of the present invention;

[0022] Figure 5 Cross-sectional view of the installation structure of a low pre-tightening anti-climbing energy-absorbing device according to an embodiment of the present invention.

[0023] In the figure:

[0024] 1. Vehicle body end structure; 11. Anti-slip groove; 2. Anti-climbing energy-absorbing device; 21. Mounting seat; 22. Mounting plane; 23. Anti-slip groove block; 24. Guide hole; 25. Energy-absorbing element; 26. Guide structure; 27. Anti-climbing tooth; 3. Fastener. Detailed implementation manners

[0025] To further illustrate the embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, mainly used to illustrate the embodiments, and can be used to explain the operating principle of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0026] According to an embodiment of the present invention, there is provided an installation structure of a low pre-tightening anti-climbing energy-absorbing device.

[0027] Now, the present invention will be further described in conjunction with the accompanying drawings and specific implementation manners. As Figure 1 shown, the installation structure of the low pre-tightening anti-climbing energy-absorbing device according to an embodiment of the present invention includes a vehicle body end structure 1. An anti-climbing energy-absorbing device 2 is provided on one side of the vehicle body end structure 1, and the vehicle body end structure 1 and the anti-climbing energy-absorbing device 2 are connected by a fastener 3.

[0028] With the above technical solution, the present invention forms a meshing structure similar to a thread through the cooperation of the end structure 1 of the vehicle body and the anti-climbing energy-absorbing device 2. The meshing structure bears the shear force generated on the contact surface by the vertical load during train climbing and stacking, thereby reducing the demand for the frictional force on the contact surface. Further, the pre-tightening force of the installation can be reduced, and the meshing structure can effectively resist the vertical shear force along the contact surface, thereby facilitating the selection of smaller-sized fasteners and reducing the installation difficulty.

[0029] Such as Figures 2 - 5As shown, in one embodiment, for the above-mentioned vehicle body end structure 1, an anti-slip groove 11 is provided in the middle of one side of the vehicle body end structure 1 (the anti-slip groove 11 of the vehicle body end structure 1 can be extruded together with the profile, or obtained by welding a flat plate with an anti-slip groove 11), and the anti-slip groove 11 cooperates with the anti-climbing energy absorption device 2. The anti-climbing energy absorption device 2 includes a mounting seat 21 provided on one side of the vehicle body end structure 1, and a mounting plane 22 is provided on the side of the mounting seat 21 close to the vehicle body end structure 1. A number of anti-slip groove blocks 23 are provided on the mounting plane 22. A guiding hole 24 is provided in the middle of the mounting seat 21, and an energy absorption element 25 is provided in the middle of the guiding hole 24 (the energy absorption element 25 uses a honeycomb core, and the guiding hole 24 provides support and guiding functions for the energy absorption element; if the energy absorption element 25 uses an expansion tube type, the cross-sectional dimension of the used expansion tube is larger than the dimension of the guiding hole 24, and the expansion tube undergoes plastic deformation when passing through the guiding hole 24 to absorb the impact energy of the train; the guiding hole 24 also provides a guiding function for the energy absorption element. If the energy absorption element 25 uses a planing type, a cutting tool can be installed in front of the mounting seat 21 to cut the energy absorption element, and the guiding hole 24 also provides a guiding function for the energy absorption element; the mounting plane 22 and the anti-slip groove blocks 23 are obtained by machining; if the mounting seat 21 uses an aluminum alloy profile, the anti-slip groove blocks are extruded together with the profile), a guiding structure 26 is provided at one end of the energy absorption element 25 close to the mounting seat 21, and an anti-climbing tooth 27 is provided at the other end of the energy absorption element 25. The anti-slip groove 11 cooperates with the anti-slip groove blocks 23, and both the anti-slip groove 11 and the anti-slip groove blocks 23 are triangular, and the radius of the rounded top of the protruding anti-slip groove block 23 is larger than the radius of the bottom of the anti-slip groove 11. A hole is provided inside the vehicle body end structure 1, and a connection hole is provided in the middle of the vehicle body end structure 1, and the connection hole cooperates with the guiding structure 26. Threaded holes are provided at the four corners of the mounting seat 21, and mating holes are provided at the four corners of the anti-slip groove 11, and the mating holes correspond to the threaded holes. The fastener 3 includes a bolt and a nut. The threaded hole and the mating hole are connected by the fastener 3, and the nut is located inside the hole. Through the cooperation of the anti-slip groove 11 and the anti-slip groove blocks 23, a biting structure similar to a thread can be formed, and the biting structure bears the shear force generated by the vertical load on the contact surface during the climbing and overlapping of the train, thereby reducing the requirement for the frictional force on the contact surface, and the pre-tightening force of the installation can be reduced, so that smaller-sized fasteners can be selected, reducing the installation difficulty, and the installation structure is applicable to the anti-climbing energy absorption device using honeycomb core, expansion tube type, and planing type energy absorption elements. If the anti-climbing energy absorption device uses a honeycomb core type energy absorption element, the mounting seat can be made of carbon steel or aluminum alloy, with a hole in the middle to provide support and guiding functions for the energy absorption element housing; if the anti-climbing energy absorption device uses an expansion tube type, the mounting seat is made of carbon steel, with a hole in the middle for the plastic deformation of the expansion tube energy absorption element and providing a guiding function at the same time. If the anti-climbing energy absorption device uses a planing type, a cutting tool can be installed in front of the mounting seat to cut the energy absorption element, thereby greatly improving the application range of the present invention.

[0030] Among them, the anti-climbing energy-absorbing device 2 is applicable to honeycomb core, expansion tube type, and shaving type energy-absorbing elements. When the anti-climbing energy-absorbing device 2 adopts a honeycomb core type energy-absorbing element, the mounting seat 21 is made of carbon steel or aluminum alloy, and is provided with holes in the middle to provide support and guidance for the energy-absorbing element 25;

[0031] When the anti-climbing energy-absorbing device 2 adopts the expansion tube type, the mounting seat is made of carbon steel, provided with holes in the middle, and is used for the plastic deformation of the expansion tube energy-absorbing element, while providing a guiding function;

[0032] When the anti-climbing energy-absorbing device 2 adopts the shaving type, a cutting tool is installed in front of the mounting seat 21 for cutting the energy-absorbing element 25.

[0033] Both the anti-slip groove block 23 and the anti-slip groove 11 are triangular. The top fillet radius of the triangular protrusion is greater than the radius of the bottom of the groove. The anti-slip groove block 23 can be designed on the anti-climbing device mounting surface, and the anti-slip groove 11 can be designed on one side of the vehicle body end structure. Moreover, the anti-slip groove block 23 and the anti-slip groove 11 are used in combination, and the profiles of the anti-slip groove block 23 and the anti-slip groove 11 can be semi-circular, or the anti-slip groove block 23 and the anti-slip groove 11 can be square-shaped, and can be selected according to their own needs.

[0034] To facilitate the understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in the actual process will be described in detail below.

[0035] In actual application, by engaging the anti-slip groove block 23 with the anti-slip groove 11, after the engagement is completed, the threaded hole and the mating hole are connected and fixed by the fastener 3. After the anti-climbing energy-absorbing device 2 is installed on the vehicle body end structure 1 through the fastener 3, the anti-slip groove block 23 and the anti-slip groove 11 provided by the vehicle body end structure 1 can be engaged with each other to form an engagement structure similar to a thread, and the anti-climbing energy-absorbing device 2 can be fixed.

[0036] In addition, the installation structure of the low pre-tightening force anti-climbing energy-absorbing device of the present invention can absorb the energy of the train during the collision of the train track, improve the use effect of the installation structure of the low pre-tightening force anti-climbing energy-absorbing device, and generally, the installation structure of the low pre-tightening force anti-climbing energy-absorbing device is used more for absorbing energy of the train track. The energy-absorbing element can be selected according to the actual needs of the train track to improve the energy absorption efficiency of the installation structure of the low pre-tightening force anti-climbing energy-absorbing device for the train track. At the same time, it is convenient to install and disassemble the train track, which is conducive to improving the energy absorption of the train track after the installation of the installation structure of the low pre-tightening force anti-climbing energy-absorbing device, and greatly improves the use efficiency and installation operation convenience of the installation structure of the low pre-tightening force anti-climbing energy-absorbing device.

[0037] In summary, by means of the above technical solution of the present invention, through the cooperation of the anti-slip groove 11 and the anti-slip groove block 23, an occluding structure similar to a thread is formed after the anti-climbing energy absorption device 2 is installed. The occluding structure bears the shear force generated by the vertical load on the contact surface during train climbing and stacking, thereby reducing the demand for the frictional force on the contact surface. Further, the pre-tightening force during installation can be reduced, and the occluding structure can effectively resist the vertical shear force along the contact surface, thereby facilitating the selection of smaller-sized fasteners and reducing the installation difficulty.

[0038] In addition, the installation structure provided by the present invention is applicable to anti-climbing energy absorption devices using honeycomb core, expansion tube type, and shaving type energy absorption elements. If the anti-climbing energy absorption device uses a honeycomb core type energy absorption element, the mounting seat can be made of carbon steel or aluminum alloy, with holes provided in the middle to provide support and guidance for the energy absorption element housing. If the anti-climbing energy absorption device uses an expansion tube type, the mounting seat is made of carbon steel, with holes provided in the middle for the plastic deformation of the expansion tube energy absorption element and to provide a guiding function at the same time. If the anti-climbing energy absorption device uses a shaving type, a cutting tool can be installed in front of the mounting seat to cut the energy absorption element, thus greatly improving the applicable range of the present invention.

[0039] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An installation structure of a low-preload anti-climbing energy-absorbing device, characterized in that, It includes a car body end structure (1), on one side of the car body end structure (1), an anti-climbing energy-absorbing device (2) is provided, and the car body end structure (1) is connected to the anti-climbing energy-absorbing device (2) by a fastener (3); In the middle of one side of the car body end structure (1), an anti-slip groove (11) is provided, and the anti-slip groove (11) is matched with the anti-climbing energy-absorbing device (2); The anti-climbing energy-absorbing device (2) includes a mounting seat (21) arranged on one side of the car body end structure (1), and on the side of the mounting seat (21) close to the car body end structure (1), a mounting plane (22) is provided, and a number of anti-slip groove blocks (23) are provided on the mounting plane (22); A guiding hole (24) is provided in the middle of the mounting seat (21), an energy-absorbing element (25) is arranged in the middle of the guiding hole (24), a guiding structure (26) is arranged at one end of the energy-absorbing element (25) close to the mounting seat (21), and an anti-climbing tooth (27) is arranged at the other end of the energy-absorbing element (25); The anti-slip groove (11) is matched with the anti-slip groove block (23), and both the anti-slip groove (11) and the anti-slip groove block (23) are triangular, and the radius of the rounded top of the protruding anti-slip groove block (23) is greater than the radius of the bottom of the anti-slip groove (11).

2. The installation structure of a low pre-tightening anti-climbing energy absorption device according to claim 1, characterized in that A hole is provided inside the car body end structure (1).

3. The installation structure of a low pre-tightening anti-climbing energy-absorbing device according to claim 2, characterized in that A connection hole is provided in the middle of the car body end structure (1), and the connection hole is matched with the guiding structure (26).

4. The installation structure of a low pre-tightening anti-climbing energy-absorbing device according to claim 3, characterized in that, Threaded holes are provided at the four corners of the mounting seat (21).

5. The installation structure of a low pre-tightening anti-climbing energy-absorbing device according to claim 4, characterized in that, Cooperating holes are provided at the four corners of the anti-slip groove (11), and the cooperating holes correspond to the threaded holes.

6. The installation structure of a low pre-tightening anti-climbing energy-absorbing device according to claim 5, characterized in that, The fastener (3) includes a bolt and a nut.

7. The installation structure of a low pre-tightening anti-climbing energy-absorbing device according to claim 6, characterized in that, The threaded hole and the cooperating hole are connected by the fastener (3), and the nut is located inside the hole.

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