阅读说明：本技术 一种轨道车辆诱导式压溃吸能装置 (Induced crushing energy-absorbing device of rail vehicle ) 是由 杨冰 刘禹昕 高宁 张相宁 陈书剑 缪得祥 肖守讷 阳光武 朱涛 于 2019-09-18 设计创作，主要内容包括：本发明的目的是提供一种轨道车辆诱导式压溃吸能装置,属于轨道交通车辆被动安全技术领域,防爬器的背面与各吸能管前端分别焊接固定,吸能管尾端与安装座内侧固定,所述吸能管包括等长且前部均设有诱导孔的第一吸能管、第二吸能管、第三吸能管、第四吸能管,它们同轴、等距嵌套设置；所述诱导孔沿吸能管周向设置。所述安装座表面设有四个圆形凹槽,用于吸能管插入固定,同时第一吸能管与安装座焊接固定。所述第一吸能管、第二吸能管、第三吸能管和第四吸能管均设有四段形状为矩形的诱导孔,两两交叉设置。用于车辆被动安全。(The back of an anti-creeper is welded and fixed with the front ends of energy-absorbing pipes respectively, the tail ends of the energy-absorbing pipes are fixed with the inner side of a mounting seat, the energy-absorbing pipes comprise a first energy-absorbing pipe, a second energy-absorbing pipe, a third energy-absorbing pipe and a fourth energy-absorbing pipe which are equal in length and provided with induction holes at the front parts, and the first energy-absorbing pipe, the second energy-absorbing pipe, the third energy-absorbing pipe and the fourth energy-absorbing pipe are coaxially and equidistantly nested; the inducing hole is arranged along the circumferential direction of the energy absorbing pipe. The surface of the mounting seat is provided with four circular grooves for inserting and fixing the energy-absorbing pipes, and meanwhile, the first energy-absorbing pipes are welded and fixed with the mounting seat. The first energy absorption pipe, the second energy absorption pipe, the third energy absorption pipe and the fourth energy absorption pipe are all provided with four sections of rectangular induction holes, and every two induction holes are arranged in a crossed mode. The vehicle passive safety device is used for vehicle passive safety.)

1. The utility model provides an induced conquassation energy-absorbing device of rail vehicle, includes anticreeper (1), mount pad (6) and energy-absorbing pipe, the back and each energy-absorbing pipe front end welded fastening respectively of anticreeper (1), and energy-absorbing pipe tail end is inboard fixed with mount pad (6), its characterized in that: the energy-absorbing pipes comprise a first energy-absorbing pipe (5), a second energy-absorbing pipe (4), a third energy-absorbing pipe (3) and a fourth energy-absorbing pipe (2) which are equal in length and provided with induction holes (7) at the front parts, and the first energy-absorbing pipe, the second energy-absorbing pipe, the third energy-absorbing pipe and the fourth energy-absorbing pipe are coaxially and equidistantly nested; the inducing hole (7) is arranged along the circumferential direction of the energy absorbing pipe.

2. The railway vehicle induced crushing energy absorption device according to claim 1, wherein: the anti-creeping device (1) is of a secondary concave structure.

3. The railway vehicle induced crushing energy absorption device according to claim 1, wherein: the inner side surface of the mounting seat (6) is provided with four concentric circular grooves.

4. The railway vehicle induced crushing energy absorption device according to claim 1, wherein: the first energy absorption pipe (5), the second energy absorption pipe (4), the third energy absorption pipe (3) and the fourth energy absorption pipe (2) are all provided with four sections of induction holes (7) which are rectangular in shape, and every two sections of induction holes are arranged in a crossed mode.

5. The railway vehicle induced crushing energy absorption device according to claim 1, wherein: the distance between the inducing hole (7) in the front parts of the first energy-absorbing pipe (5), the second energy-absorbing pipe (4), the third energy-absorbing pipe (3) and the fourth energy-absorbing pipe (2) and the anti-creeper (1) is respectively 140mm, 200mm, 80mm and 200mm, the angle corresponding to the arc length of each inducing hole is 72 degrees, and the width is 10 mm.

Technical Field

The invention belongs to the technical field of passive safety of rail transit vehicles, and relates to a passive safety technology of a train end.

Background

In recent years, with the rapid development of high-speed railways in China, the requirements for high speed and light weight of trains are higher and higher, the operation safety of the trains is more and more concerned by people in the industry while the speed is increased and the quality is reduced, and particularly the passive safety performance of the trains is concerned. The energy-absorbing anti-climbing device is an important part in the passive safety of the rail train, and mainly has the functions of absorbing the collision energy of a train end through the energy-absorbing anti-climbing device when the locomotive has inevitable collision, reducing the impact of the train, protecting the safety of drivers and passengers and equipment on the train to the maximum extent, and reducing the loss caused by collision accidents as much as possible.

The conventional anti-climbing energy absorption device for the rail vehicle mainly comprises cutting type energy absorption, crushing type energy absorption, rolling type energy absorption and expansion type energy absorption, wherein the cutting type energy absorption mainly depends on cutting materials of a cutter to absorb energy, the absorbed energy is less, and large energy fluctuation generated in the collision process cannot be overcome.

When the metal round pipe is turned and deformed, the load is stable, but the metal round pipe is easy to be unstable in the energy absorption process, and the size requirement of the energy absorption device is strict.

The crushing structure mainly absorbs energy by means of a crushing pipe or a honeycomb structure. The steady state force fluctuation of the crushing structure is large when the crushing structure absorbs energy, the deformation mode is uncertain, and the crushing structure can suddenly reduce and lose the energy absorption capacity when the crushing structure is unstable.

The expansion type energy absorption device mainly comprises expansion and gas expansion of a pipe, the energy absorption range of the expansion type energy absorption device is difficult to effectively control when collision occurs, and the defects of low level of steady-state force and small energy absorption capacity cannot be overcome.

Through the analysis, the existing energy absorption structure has advantages and disadvantages, and the biggest problem is to overcome the defects of overlarge peak force, steady-state force fluctuation and controllability of a deformation mode. The invention provides an induced energy absorption device for a railway vehicle. A stable deformation mode of one-way crushing is formed by adopting a coaxial equal-length nested structure of 4 energy-absorbing crushing pipes. When the locomotive vehicle collides, the guide hole generates a predicted deformation mode, so that the peak force is reduced, the stability of the steady force is improved, and the energy absorption capacity of the energy absorption device is ensured. Greatly reduces the longitudinal impact of drivers and passengers and equipment on the vehicle, has simple structure and easy processing, and is valuable for solving the existing problems.

Disclosure of Invention

The invention aims to provide an induced crushing energy absorption device for a railway vehicle, which can effectively solve the problem of initial peak force generated when the locomotive vehicle collides.

The purpose of the invention is realized by the following technical scheme: an induced crushing energy-absorbing device of a rail vehicle comprises an anti-creeper, a mounting seat and energy-absorbing pipes, wherein the back surface of the anti-creeper is welded and fixed with the front end of each energy-absorbing pipe respectively, the tail end of each energy-absorbing pipe is fixed with the inner side of the mounting seat, each energy-absorbing pipe comprises a first energy-absorbing pipe, a second energy-absorbing pipe, a third energy-absorbing pipe and a fourth energy-absorbing pipe which are equal in length and provided with inducing holes at the front parts, and the first energy-absorbing pipe, the second energy-absorbing pipe, the; the inducing hole is arranged along the circumferential direction of the energy absorbing pipe.

The anti-creeper is of a secondary concave structure.

The inner side surface of the mounting seat is provided with four concentric circular grooves for inserting and fixing the energy-absorbing pipe, and meanwhile, the first energy-absorbing pipe is welded and fixed with the mounting seat.

The first energy absorption pipe, the second energy absorption pipe, the third energy absorption pipe and the fourth energy absorption pipe are all provided with four sections of rectangular induction holes, and every two induction holes are arranged in a crossed mode.

The distances between the induction holes in the front parts of the first energy absorption pipe, the second energy absorption pipe, the third energy absorption pipe and the fourth energy absorption pipe and the anti-creeper are respectively 140mm, 200mm, 80mm and 200mm, the angle corresponding to the arc length of each induction hole is 72 degrees, and the width of each induction hole is 10 mm.

Furthermore, the energy-absorbing structure comprises the following steps of obtaining the lengths, the widths and the distance sizes from the anti-creeper of the inducing holes on the first energy-absorbing pipe, the second energy-absorbing pipe, the third energy-absorbing pipe and the fourth energy-absorbing pipe: according to basic research, the length, width and distance from the anti-creeper of the induction hole can be considered as independent variables. The horizontal range of the opening angle of the induction hole is 18-72 degrees, the horizontal range of the width is 5-20mm, and the horizontal range of the end distance is 80-200mm, so that a six-factor four-level orthogonality test is designed, and 32 test comparison groups are designed. And setting the ratio of the absorbed energy to the peak force as an expected target, and obtaining an optimal scheme through simulation comparison. The stability of a crushing deformation mode is improved, the initial peak force of collision is effectively reduced, a force displacement curve is obtained according to simulation comparison and is shown in figure 3, and the peak force of the energy absorption structure is obviously reduced.

Compared with the prior art, the advantages and effects are as follows: the invention relates to an induced crushing energy absorption device for a railway vehicle, which adopts a nested structure with 4 energy absorption crushing pipes in the same axial length to form a stable deformation mode of one-way crushing. When the locomotive vehicle collides, the guide hole generates a predicted deformation mode, so that the peak force is reduced, the stability of the steady force is improved, and the energy absorption capacity of the energy absorption device is ensured. Greatly reduces the longitudinal impact of drivers and passengers and equipment on the vehicle, has simple structure and easy processing, and is valuable for solving the existing problems.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view of the three-dimensional structure of the present invention;

FIG. 3 is a graph comparing force versus displacement curves for an energy absorber device of the present invention with and without an induction hole.

Detailed Description

As shown in fig. 1, an induced crushing energy-absorbing device for a rail vehicle comprises an anti-creeper 1, a mounting seat 6 and energy-absorbing tubes, wherein the back surface of the anti-creeper 1 and the front ends of the energy-absorbing tubes are respectively welded and fixed, the tail ends of the energy-absorbing tubes are fixed with the inner side of the mounting seat 6, the energy-absorbing tubes comprise a first energy-absorbing tube 5, a second energy-absorbing tube 4, a third energy-absorbing tube 3 and a fourth energy-absorbing tube 2 which are equal in length and provided with induction holes 7 at the front parts, and the first energy-absorbing tube 5, the second energy-absorbing; the induction hole 7 is arranged along the circumferential direction of the energy absorption pipe. The anti-creeper 1 is of a secondary concave structure. The inner side of the surface of the mounting seat 6 is provided with four concentric circular grooves which are respectively used for inserting and fixing corresponding energy-absorbing pipes from inside to outside, and meanwhile, the first energy-absorbing pipe 5 is welded and fixed with the mounting seat 6. The first energy absorption pipe 5, the second energy absorption pipe 4, the third energy absorption pipe 3 and the fourth energy absorption pipe 2 are all provided with four sections of rectangular induction holes 7 which are arranged in a pairwise crossed manner.

Further, the distances, lengths and widths of the first energy absorption pipe 5, the second energy absorption pipe 4, the third energy absorption pipe 3 and the fourth energy absorption pipe 2 from the anti-creeper 1 to the induction holes 7 are respectively 140mm, 200mm, 80mm and 200mm according to orthogonality tests. The arc length of each induction hole corresponds to an angle of 72 degrees and a width of 10 mm.

The stability of the crushing deformation mode is improved, the initial peak force of collision is effectively reduced, and according to simulation comparison, the peak force is reduced.

An induced crushing energy absorption device for a railway vehicle adopts a coaxial equal-length nested structure of 4 energy absorption crushing pipes to form a stable deformation mode of one-way crushing. When the locomotive vehicle collides, the guide hole generates a predicted deformation mode, so that the peak force is reduced, the stability of the steady force is improved, and the energy absorption capacity of the energy absorption device is ensured. Greatly reduces the longitudinal impact of drivers and passengers and equipment on the vehicle, has simple structure and easy processing, and is valuable for solving the existing problems.

When a locomotive collides, the anti-creeper is firstly impacted, and the anti-creeper is of a secondary concave structure, so that the climbing is effectively prevented, and the collision harm is reduced; the anti-creeper generates longitudinal displacement due to longitudinal impact force, and transmits the longitudinal impact force to each energy-absorbing pipe; the rigidity of the anti-creeper relative to each energy-absorbing pipe is relatively large, and the anti-creeper hardly deforms, so that the anti-creeper simultaneously compresses each energy-absorbing crushing pipe; the inducing holes on the energy-absorbing crushing pipes induce the energy-absorbing pipes to generate stable and ordered mixed mode deformation, and the peak force of the energy-absorbing device is obviously reduced as shown in figure 3, so that the aim of stably absorbing energy is fulfilled.

The invention is not to be considered as limited to the specific embodiments thereof, and all changes, equivalents and improvements that can be made by those skilled in the art are intended to be included within the scope of the invention, all within the spirit and principle of the inventive concept.