A circumrotating cutting anti-climbing energy-absorbing device

Abstract

A kind of anti-crawling energy-absorbing device of circumrotating cutting, comprising anti-crawling tooth beam, anti-crawling tooth is installed on its outer side, front bearing is installed in the central position of its inner side to support the rotation of screw rod;Mounting plate, the central hole position of its inner side is installed with screw sleeve, screw sleeve is equipped with screw tooth matched with the external thread of screw rod;Screw cutting tool for cutting the external thread of screw rod and screw axial cutting tool for cutting the axial direction of screw rod are arranged on the outer side of mounting plate;Thin-walled tube, its both ends are fixedly connected on anti-crawling tooth beam and mounting plate;Cutting base body, it is arranged in thin-walled tube, one end of cutting base body is fixed on mounting plate, the other end is open, screw rod and screw sleeve are both located in cutting base body;Rotating disc, it is fixedly connected on screw rod near one end of anti-crawling tooth beam, axial cutting tool for cutting the end face of open end of cutting base body and circumferential cutting tool for cutting the side wall of cutting base body are arranged on rotating disc.The present application can greatly improve the energy-absorbing efficiency and play the role of anti-crawling.

Description

Technical Field

[0001] This invention belongs to the field of rail transit safety protection, specifically relating to a rotary cutting anti-climbing energy absorption device. Background Technology

[0002] Currently, energy-absorbing anti-creep devices are widely used in the rail transit field to prevent trains from climbing onto other trains and to buffer and absorb energy. In the event of a rail vehicle collision, the energy-absorbing anti-creep device provides a greater survival space for the driver and passengers and significantly reduces the damage caused by the collision. Existing energy-absorbing anti-creep devices are mainly classified into three types according to their mechanism of action: cutting type, crushing type, and expansion type. Among them, cutting-type energy-absorbing anti-creep devices absorb energy through the combined effects of friction, fracture, and plastic deformation of the metal material, resulting in a better energy absorption effect than energy absorption methods that only involve plastic deformation of the metal material. Therefore, cutting-type energy-absorbing anti-creep devices are currently one of the key research areas.

[0003] In cutting-type energy-absorbing anti-climb devices, impact force is used to cause a cutting tool to cut the energy-absorbing tube or cutting substrate from a certain direction, such as axial or circumferential, thereby converting the collision energy into the cutting energy of the metal material, realizing the absorption and dissipation of the collision energy.

[0004] Whether it is axial cutting or circumferential cutting, a large portion of the cutting substrate will not be utilized. Therefore, on the one hand, it causes waste of substrate, and on the other hand, the energy conversion efficiency of unidirectional cutting is low. Summary of the Invention

[0005] The purpose of this invention is to provide a rotary cutting anti-climb energy absorption device, which can convert collision kinetic energy into cutting energy in the circumferential, radial and axial directions, thereby achieving high-efficiency conversion of collision energy into cutting energy of metal materials, realizing energy absorption multiplication and high energy dissipation efficiency, avoiding the problem of low efficiency in converting collision energy into cutting energy under axial cutting action of substrate materials, and achieving the effect of dissipating a large collision kinetic energy with less substrate material.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a rotary cutting anti-climb energy absorption device, including an anti-climb tooth crossbeam, with anti-climb teeth installed on its outer side and a front bearing installed at the center of its inner side to support the rotation of the screw.

[0007] The mounting plate has a spiral sleeve installed in the center hole on its inner side. The spiral sleeve has spiral teeth that mate with the external thread on the screw. The outer side of the mounting plate has a spiral cutting tool for cutting off the external thread of the screw and a screw axial cutting tool for axial cutting of the screw.

[0008] Thin-walled tube, with both ends fixed to the anti-climbing tooth crossbeam and the mounting plate;

[0009] The cutting base is cylindrical and is set inside a thin-walled tube. One end of the cutting base is fixed to the mounting plate, and the other end is open. The screw and the spiral sleeve are both located inside the cutting base.

[0010] A turntable is fixedly connected to one end of the screw near the anti-climbing tooth crossbeam. The turntable is equipped with an axial cutting tool for cutting the open end face of the cutting substrate and a circumferential cutting tool for cutting the side wall of the cutting substrate.

[0011] The circumferential cutting tool includes an inner cutting tool and an outer cutting tool. The inner cutting tool extends into the cutting substrate and is used to cut the inner wall of the cutting substrate, while the outer cutting tool is used to cut the outer wall of the cutting substrate.

[0012] The cutting positions of the internal and external cutting tools are staggered in the axial direction.

[0013] A rear bearing base is provided on the outer side of the mounting plate. A through hole communicating with the center hole of the mounting plate is provided on the rear bearing base. The diameter of the front section of the through hole is equivalent to the diameter of the screw body after the threads are removed. The spiral cutting tool is provided in the front section of the through hole. A rear bearing is installed in the rear section of the through hole. The axial cutting tool of the screw is connected to the inner ring of the rear bearing.

[0014] The rear bearing is a thrust roller bearing.

[0015] The inner ring of the thrust roller bearing is fixedly connected to the screw cutting tool base. Multiple screw axial cutting tools are provided and are evenly spaced on the screw cutting tool base in the circumferential direction. The inner diameter of the ring formed by the multiple screw axial cutting tools is smaller than the diameter of the screw body after the threads are removed.

[0016] The screw cutting tool base is provided with a base fixing sleeve that can interfere with the inner ring of the thrust roller bearing.

[0017] The front bearing is mounted on the anti-climbing tooth crossbeam via a front bearing rubber gasket, and the spiral sleeve is mounted on the mounting plate via a spiral sleeve rubber gasket.

[0018] The screw is also equipped with a limiting sleeve. After a collision, the limiting sleeve will first contact the spiral sleeve as the screw moves to prevent the cutting tool on the turntable from hitting the mounting plate.

[0019] The spiral sleeve is equipped with a buffer rubber pad to reduce the impact of the limiting sleeve on the spiral sleeve.

[0020] The beneficial effects of this invention are: this invention uses a circumferential cutting method to progressively crush and cut to absorb energy, while also preventing climbing. This invention will greatly improve energy absorption efficiency and reduce the initial peak value during the collision process.

[0021] This invention can convert collision kinetic energy into cutting energy in the circumferential, radial, and axial directions, thereby achieving high-efficiency conversion of collision energy into cutting energy of metallic materials. It achieves energy absorption multiplication and high energy dissipation efficiency, avoiding the problem of low efficiency in converting collision energy into cutting energy under axial cutting action of the substrate material. It can achieve the effect of dissipating a large amount of collision kinetic energy with less substrate material. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 for Figure 1 Enlarged view of section A in the image;

[0024] Figure 3 for Figure 2 Enlarged view of section B in the image;

[0025] The markings in the diagram are: 1. Thin-walled tube, 2. Anti-climbing tooth beam, 3. Anti-climbing tooth, 4. Front bearing, 5. Flat key, 6. Turntable, 7. External cutting tool, 8. Internal cutting tool, 9. Limiting sleeve, 10. Screw, 11. Cutting base, 12. Mounting hole, 13. Mounting plate, 14. Helical sleeve, 15. Axial cutting tool, 16. Helical sleeve rubber gasket, 17. Front bearing rubber gasket, 18. Buffer rubber gasket, 19. Rear bearing base, 20. Rear bearing end cover, 21. Helical cutting tool, 22. Thrust roller bearing, 23. Screw axial cutting tool, 24. Screw cutting tool base, 25. External thread, 26. Thrust roller bearing inner ring, 27. Base fixing sleeve. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the invention in any way.

[0027] like Figure 1 As shown, a rotary cutting anti-climb energy absorption device is provided. One end of the device is equipped with a mounting plate 13 for bolting to the crossbeam of the locomotive chassis. The other end has anti-climb teeth 3 fixed to an anti-climb tooth crossbeam 2. The anti-climb tooth crossbeam 2 and the mounting plate 13 are respectively fixed to both ends of a thin-walled tube 1. The thin-walled tube 1 can be configured with different interface shapes, such as circular or square, as needed. A cutting base 11 concentric with the thin-walled tube 1 is provided inside the thin-walled tube 1. The cutting base 11 has a cylindrical structure, with one end fixed to the inner side of the mounting plate 13 and the other end open. The outer diameter of the cutting base 11 is smaller than the inner diameter of the thin-walled tube 1, and the axial length of the cutting base 11 is smaller than the length of the thin-walled tube 1.

[0028] A spiral sleeve 14 is provided inside the cutting base 11. The spiral sleeve 14 is fixed to the center of the mounting plate 13, and the center hole of the spiral sleeve 14 is connected to the through hole provided on the mounting plate 13. The center hole of the spiral sleeve 14 is provided with spiral teeth for threaded engagement with the screw 10. One end of the screw 10 is connected to the front bearing 4 provided on the anti-climbing tooth crossbeam 2, and the other end passes through the mounting plate 13 and is connected to the thrust roller bearing 22 on the outside of the mounting plate 13. A turntable 6, which moves with the screw 10, is also mounted on the screw 10. The turntable 6 and the screw 10 are fastened together by a flat key 5. An axial cutting tool 15 and a circumferential cutting tool are provided on the side of the turntable 6 facing the cutting substrate 11. The axial cutting tool 15 contacts the end face of the cutting substrate 11, so that the turntable 6 can perform axial and circumferential composite cutting on the end face of the cutting substrate 11 during rotation with the screw 10. The circumferential cutting tool includes an inner cutting tool 8 and an outer cutting tool 7. The inner cutting tool 8 extends into the cutting substrate 11 and performs radial cutting to a certain depth on its inner wall during circumferential rotation. The outer cutting tool 7 contacts the outer wall of the cutting substrate 11 and performs radial cutting to a certain depth on its outer wall during circumferential rotation. The cutting positions of the inner cutting tool 8 and the outer cutting tool 7 are axially misaligned to ensure that the axial cutting tool 15 can cut the substrate located between the inner cutting tool 8 and the outer cutting tool 7, and to ensure that the inner cutting tool 8 and the outer cutting tool 7 can remove more substrate, increasing energy absorption. Figure 1 As shown, the cutting position of the inner cutting tool 8 is closer to the end face of the cutting base 11 than that of the outer cutting tool 7. During the rotation of the turntable 6 with the screw 10, the axial cutting tool 15, the inner cutting tool 8, and the outer cutting tool 7 perform multi-directional cutting on the cutting base 11.

[0029] Combined Figure 1-3 As shown, a rear bearing base 19 for mounting the thrust roller bearing 22 is provided on the outer side of the mounting plate 13. A through hole is provided in the center of the rear bearing base 19, and a helical cutting tool 21 for cutting the external thread of the screw 10 is provided on the wall of the through hole. The thrust roller bearing 22 is axially positioned on the rear bearing base 19 by the rear bearing end cover 20. The thrust roller bearing 22, the through hole, and the screw 10 are concentrically arranged. A screw axial cutting tool 23 is mounted on the inner ring 26 of the thrust roller bearing. The screw axial cutting tool 23 is fixed on the screw cutting tool base 24 and multiple tools are arranged at intervals along the circumference. The inner diameter of the screw axial cutting tool 23 is smaller than the diameter of the screw 10 that cuts the external thread, and it is used for axial cutting of the screw 10. One end of the screw cutting tool base 24 is interference-fitted to the inner ring 26 of the thrust roller bearing through the base fixing sleeve 27 to ensure a stable fit between the inner ring 26 of the thrust roller bearing and the screw axial cutting tool 23 and to prevent slippage. The thrust roller bearing 22 can bear large axial and radial forces.

[0030] During installation, the device is installed on both sides of the front and rear ends of the locomotive. In the event of a head-on or rear-end collision between two vehicles, the anti-climb teeth 3 of the anti-climb device mesh with each other. Under the impact force, the anti-climb tooth crossbeam 2 is compressed, pushing the screw 10 forward. The helical teeth between the screw 10 and the helical sleeve 14 mesh with each other, causing the screw 10 to rotate and move forward. At this time, the thin-walled tube 1 first undergoes crushing deformation, generating a small peak load. The rotation of the screw drives the turntable 6 to rotate. The axial cutting tool 15, inner cutting tool 8, and outer cutting tool 7 on the turntable 6 rotate and move accordingly. The axial cutting tool 15 begins to cut the material of the end face of the substrate 11 along the circumference, while the inner cutting tool 8 and outer cutting tool 7 cut the inner and outer sides of the substrate 11 along the circumference. The material is selected to remove the base material in different directions. During the collision, the screw 10 moves spirally towards the mounting plate 13 through the spiral sleeve 14. After passing through the mounting plate 13, the thread 25 on the screw 10 is cut and absorbed by the spiral cutting blade 21 mounted on the rear bearing base. The screw 10 continues to move forward spirally. When it reaches the position of the screw axial cutting blade 23, it is cut and absorbed by the screw axial cutting blade 23 along the axial direction. At this time, the screw cutting blade base 24 is fixed on the inner ring 26 of the thrust roller bearing. The screw drives the screw axial cutting blade 23 and the screw cutting blade base 24 to rotate spirally, and simultaneously performs axial cutting. Finally, the cut screw 10 comes out from the middle circular hole of the rear bearing end cover 20.

[0031] Furthermore, in order to provide cushioning for the impact force, a front bearing rubber gasket 17 is provided between the front bearing 4 and the anti-climbing tooth crossbeam 2, and a spiral sleeve rubber gasket 16 is provided between the spiral sleeve 14 and the mounting plate 13.

[0032] Furthermore, a limiting sleeve 9 is provided on one end of the screw 10 near the front bearing 4. The limiting sleeve 9 is located on the screw 10 inside the cutting base 11. By adjusting the installation position of the limiting sleeve 9, when the collision occurs, the limiting sleeve 9 moves with the screw 10 to contact the spiral sleeve 14, ensuring that the cutting tool on the turntable 6 will not touch the mounting plate 13, thereby preventing the tool from being damaged.

[0033] Furthermore, a buffer rubber pad 18 is installed on the spiral sleeve 14 to reduce the impact of the limiting sleeve 9 on the spiral sleeve 14.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of the present invention with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are within the protection scope of the pending claims.

Claims

1. A circumrotos cutting anti-creeper energy absorbing device, characterized in that: The anti-climb beam is provided with anti-climb teeth on the outer side and a front bearing is arranged at the center of the inner side to support the rotation of the screw rod. A mounting plate is provided with a screw sleeve at the center of the inner side, and the screw sleeve is provided with screw teeth matched with the external screw thread of the screw rod. The outer side of the mounting plate is provided with a screw cutting tool for cutting the external screw thread of the screw rod and a screw axial cutting tool for cutting the screw rod in the axial direction. A thin-walled tube is fixed to the anti-climb beam and the mounting plate at both ends. A cutting base is arranged in the thin-walled tube in a cylindrical shape, and one end of the cutting base is fixed to the mounting plate and the other end is open.

2. The anti-creeper energy absorbing device of claim 1, wherein: A rotating disc is fixed to the screw rod near the anti-climb beam, and the rotating disc is provided with an axial cutting tool for cutting the end face of the open end of the cutting base and a circumferential cutting tool for cutting the side wall of the cutting base.

3. The anti-creeper energy absorbing device of claim 1, wherein: The cutting positions of the inner cutting tool and the outer cutting tool are staggered in the axial direction.

4. The anti-creeper energy absorbing device of claim 3, wherein: The rear bearing is a thrust roller bearing.

5. The anti-creeper energy absorbing device of claim 4, wherein: The inner ring of the thrust roller bearing and the screw cutting tool base are fixedly connected, and the screw axial cutting tools are arranged on the screw cutting tool base in a uniform and spaced manner in the circumferential direction.

6. The anti-creeper energy absorbing device of claim 1, wherein: The screw cutting tool base is provided with a base fixing sleeve capable of interference fitting with the inner ring of the thrust roller bearing.

7. The anti-creeper energy absorbing device of claim 1, wherein: The front bearing is mounted on the anti-climb beam through a front bearing rubber gasket, and the screw sleeve is mounted on the mounting plate through a screw sleeve rubber gasket.

8. The anti-creeper energy absorbing device of claim 7, wherein: The screw rod is further provided with a limiting sleeve, which first contacts the screw sleeve during the movement of the screw rod after the collision occurs to avoid the cutting tools on the rotating disc from colliding with the mounting plate. A buffer rubber gasket is mounted on the screw sleeve to reduce the impact of the limiting sleeve on the screw sleeve.

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