Automobile anti-collision beam skeleton assembly

Abstract

The application discloses an automobile anti-collision beam framework assembly, which comprises an outer anti-collision beam and an inner anti-collision beam, and an energy-absorbing mechanism is arranged between the outer anti-collision beam and the inner anti-collision beam; the inner anti-collision beam is symmetrically provided with energy-absorbing boxes on the side opposite to the outer anti-collision beam; the energy-absorbing box comprises a base, a top cover, a thin-wall shell and a filling structure; the filling structure comprises a plurality of energy-absorbing plates arranged in a stack and a helical spring used for connecting the energy-absorbing plates; the energy-absorbing plate comprises a plate body, a circular through hole is arranged at the middle position of the plate body, a reinforcing sleeve with a circular ring structure is fixedly arranged at the position of the circular through hole, a helical groove with a helical structure is arranged on the inner wall of the reinforcing sleeve, an energy-absorbing protrusion with an arch bridge structure formed by stamping the plate body is fixedly arranged on the plate body, and the helical spring passes through the reinforcing sleeves on all the energy-absorbing plates and is embedded into the helical groove on the inner wall of the reinforcing sleeve; and the energy-absorbing performance of the energy-absorbing mechanism is weaker than that of the energy-absorbing box. The application has excellent energy-absorbing performance, simple structure and low manufacturing cost.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts technology, specifically relating to an automotive anti-collision beam frame assembly. Background Technology

[0002] Automobile safety is a crucial issue in automotive development, and crash performance plays a vital role in ensuring vehicle safety. All automobiles are equipped with a crash beam frame assembly, also known as a bumper frame assembly, which includes the crash beam (also called the bumper frame beam), energy-absorbing box, and floor plate.

[0003] An energy-absorbing box is an energy-absorbing device in a bumper. When a collision occurs, it absorbs energy through its own compression and deformation, reducing the peak impact force and thus minimizing injury to passengers. An energy-absorbing box generally consists of an outer shell and an internal filling structure. It absorbs energy through its own compression and deformation, and the energy absorption performance of the energy-absorbing box mainly depends on its filling structure.

[0004] For example, the announcement number CN112428949B, named "An Additive Manufacturing-Based Recoverable Deformable Car Energy Absorbing Box," describes a complex structure made of high-entropy alloy material for the filling structure of the energy absorbing box. As a result, it can only be manufactured by one-piece printing, which is very expensive. Therefore, it is necessary to develop a car anti-collision beam frame assembly with lower manufacturing cost and excellent energy absorption performance. Summary of the Invention

[0005] To address the aforementioned drawbacks, this invention provides an automotive anti-collision beam frame assembly that has excellent energy absorption properties, a simple structure, and low manufacturing costs.

[0006] The objective of this invention is achieved through the following technical solution: an automotive anti-collision beam frame assembly, comprising an outer anti-collision beam and an inner anti-collision beam, with an energy-absorbing mechanism provided between the outer and inner anti-collision beams. Energy-absorbing boxes are symmetrically installed on the side of the inner anti-collision beam opposite to the outer anti-collision beam. Each energy-absorbing box includes a base, a top cover, a thin-walled outer shell fixedly disposed between the base and the top cover, and a filling structure located inside the thin-walled outer shell. The top cover is fixedly connected to the inner anti-collision beam. An annular guide groove is provided on the side wall of the thin-walled outer shell, surrounding its centerline. One end of the filling structure abuts against the base, and the other end abuts against the top cover. The filling structure includes multiple energy-absorbing plates stacked along the centerline of the thin-walled outer shell and a spiral for connecting the energy-absorbing plates. The energy-absorbing plate includes a plate body with a circular through hole in the middle. A reinforcing sleeve with a circular structure is fixed at the circular through hole. The inner wall of the reinforcing sleeve has a spiral groove with a spiral structure, and the number of turns of the spiral groove is between half a turn and one turn. An energy-absorbing protrusion with an arch-shaped structure formed by stamping the plate body is fixed on the plate body. The energy-absorbing protrusions on the plate body are distributed in a circumferential array around the center line of the reinforcing sleeve. The energy-absorbing protrusions on the plate body are located on the same side of the plate body. The energy-absorbing protrusions in adjacent energy-absorbing plates are staggered and connected to the plate body of the adjacent energy-absorbing plate. The spiral spring passes through the reinforcing sleeves on all energy-absorbing plates and is embedded in the spiral groove of the inner wall of the reinforcing sleeve. The energy absorption performance of the energy-absorbing mechanism is weaker than that of the energy-absorbing box.

[0007] Preferably, the energy-absorbing mechanism includes several energy-absorbing units distributed along the length of the outer anti-collision beam. Each energy-absorbing unit includes two fixing blocks that are respectively fixed on the outer anti-collision beam and the inner anti-collision beam. A serpentine spring formed by bending sheet material is fixed between the two fixing blocks. The length directions of the serpentine springs in adjacent energy-absorbing units are parallel to each other, and the planes in which the serpentine springs are located in adjacent energy-absorbing units are perpendicular to each other.

[0008] Preferably, the outer anti-collision beam has grooves for installing fixing blocks on the side facing the inner anti-collision beam and the inner anti-collision beam has grooves for installing fixing blocks on the side facing the outer anti-collision beam.

[0009] Preferably, the fixing block is embedded in the groove, with the front end face of the fixing block connected to the outer anti-collision beam abutting against the inner side surface of the outer anti-collision beam, and the rear end face of the fixing block connected to the inner anti-collision beam abutting against the inner side surface of the inner anti-collision beam, and the fixing block is welded to the side wall of the groove.

[0010] Preferably, both the outer and inner anti-collision beams are formed by bending flat sheet metal, and the flat sheet metal is bent to form the groove and the protruding beam.

[0011] Preferably, the top cover is provided with a connecting groove, and the protruding beam on the inner anti-collision beam is embedded in the connecting groove.

[0012] Preferably, the energy-absorbing protrusions are located on the side of the plate facing the top cover, with the energy-absorbing protrusions in the energy-absorbing plate closest to the top cover abutting against the top cover, and the plate in the energy-absorbing plate closest to the base abutting against the base.

[0013] Preferably, the base has two sides that protrude outward relative to the outer wall of the thin-walled shell, and the protruding parts are provided with mounting holes.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In this invention, an energy-absorbing mechanism is provided between the outer and inner anti-collision beams, and an energy-absorbing box is provided on the inner anti-collision beam, so that this invention has a secondary energy absorption effect and excellent energy absorption performance.

[0016] 2. The energy-absorbing box contains stacked energy-absorbing plates and helical springs for connecting the energy-absorbing plates. The overall structure is simple and can greatly reduce production costs.

[0017] 3. In the energy-absorbing box, the energy-absorbing plates are connected by helical springs, which not only makes the filling structure a whole, but also improves the energy absorption performance of the filling structure. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a 3D view of the energy absorption unit;

[0020] Figure 3 This is a 3D view of the energy-absorbing box;

[0021] Figure 4 To fill in the 3D structure;

[0022] Figure 5 This is a 3D view of the energy-absorbing panel;

[0023] The markings in the diagram are: 1. Outer anti-collision beam, 2. Inner anti-collision beam, 3. Energy-absorbing unit, 4. Fixing block, 5. Serpentine spring, 6. Groove, 7. Protruding beam, 8. Energy-absorbing box, 9. Base, 10. Top cover, 11. Thin-walled outer shell, 12. Connecting groove, 13. Induction groove, 14. Energy-absorbing plate, 15. Helical spring, 16. Plate body, 17. Reinforcing sleeve, 18. Helical groove, 19. Energy-absorbing protrusion, 20. Mounting hole. Detailed Implementation

[0024] The present invention will be further described below with reference to the embodiments illustrated in the accompanying drawings:

[0025] Example 1

[0026] like Figures 1-5As shown, an automotive anti-collision beam frame assembly includes an outer anti-collision beam 1 and an inner anti-collision beam 2. An energy-absorbing mechanism is provided between the outer anti-collision beam 1 and the inner anti-collision beam 2. The energy-absorbing mechanism includes multiple energy-absorbing units 3 distributed along the length direction of the outer anti-collision beam 1. Each energy-absorbing unit 3 includes two fixing blocks 4 respectively fixed to the outer anti-collision beam 1 and the inner anti-collision beam 2. A serpentine spring 5 formed by bending sheet material is fixed between the two fixing blocks 4. The length directions of the serpentine springs 5 ​​in adjacent energy-absorbing units 3 are parallel to each other, and the planes in which the serpentine springs 5 ​​are located in adjacent energy-absorbing units 3 are perpendicular to each other. The serpentine springs 5 ​​in the energy-absorbing mechanism achieve the energy-absorbing effect through their elasticity. At the same time, after being subjected to a slight impact, the serpentine springs 5 ​​can return to their initial state. If all the serpentine springs 5 ​​are set in the same direction, it will cause the outer anti-collision beam 1 to sway along the plane of the serpentine springs 5. However, by using the method of making the planes of adjacent serpentine springs 5 ​​perpendicular to each other in this invention, the degree of swaying of the outer anti-collision beam 1 relative to the inner anti-collision beam 2 in the up-down and left-right directions can be reduced, making the connection between the outer anti-collision beam 1 and the inner anti-collision beam 2 more stable.

[0027] The outer anti-collision beam 1 has a groove 6 on the side facing the inner anti-collision beam 2, and the inner anti-collision beam 2 has a groove 6 on the side facing the outer anti-collision beam 1, for installing the fixing block 4. The fixing block 4 is embedded in the groove 6 and is welded to the side wall of the groove 6. The front end face of the fixing block 4 connected to the outer anti-collision beam 1 abuts against the inner side surface of the outer anti-collision beam 1, and the rear end face of the fixing block 4 connected to the inner anti-collision beam 2 abuts against the inner side surface of the inner anti-collision beam 2. The fixing block 4 is welded to the side wall of the groove 6.

[0028] Both the outer anti-collision beam 1 and the inner anti-collision beam 2 are formed by bending flat plates. The bending of the flat plates forms the groove 6 and the protruding beam 7. The groove 6 is used to install the fixing block 4, so that the connection area between the fixing block 4 and the outer anti-collision beam 1 or the inner anti-collision beam 2 is larger and the installation is more stable. The setting of the protruding beam 7 can enhance the structural strength of the outer anti-collision beam 1 and the inner anti-collision beam 2 and improve their impact resistance.

[0029] The inner anti-collision beam 2 is symmetrically equipped with an energy-absorbing box 8 on one side of the outer anti-collision beam 1. The energy-absorbing box 8 includes a base 9, a top cover 10, a thin-walled outer shell 11 welded and fixed between the base 9 and the top cover 10, and a filling structure located inside the thin-walled outer shell 11. The top cover 10 is fixedly connected to the inner anti-collision beam 2. The top cover 10 is provided with a connecting groove 12. The protruding beam 7 on the inner anti-collision beam 2 is embedded in the connecting groove 12. The bottom of the connecting groove 12 abuts against the protruding beam 7, so that the top cover 10 and the inner anti-collision beam 2 can fit more closely. The thin-walled outer shell 11 has an annular guiding groove 13 on its side wall, arranged around the center line of the thin-walled outer shell 11. One end of the filling structure abuts against the base 9, and the other end abuts against the top cover 10. The filling structure includes multiple energy-absorbing plates 14 stacked along the center line of the thin-walled outer shell 11 and a helical spring 15 for connecting the energy-absorbing plates 14. The energy-absorbing plate 14 includes a plate body 16, with a circular through hole in the middle of the plate body 16. A circular reinforcing sleeve 17 is fixed at the position of the circular through hole, and the inner wall of the reinforcing sleeve 17 is provided with... The plate 16 has a spiral groove 18 with a number of half-turns to one-turns. An energy-absorbing protrusion 19, formed by stamping the plate 16, is fixedly provided on the plate 16. The energy-absorbing protrusions 19 on the plate 16 are arranged in a circular array around the center line of the reinforcing sleeve 17. The energy-absorbing protrusions 19 on the plate 16 are located on the side of the plate 16 facing the top cover 10. The energy-absorbing protrusion 19 in the energy-absorbing plate 14 closest to the top cover 10 abuts against the top cover 10, and the plate body 16 in the energy-absorbing plate 14 closest to the base 9 abuts against the base 9. The energy-absorbing protrusions 19 in adjacent energy-absorbing plates 14 are staggered and connected to the plate body 16 of the adjacent energy-absorbing plate 14. The spiral spring 15 passes through the reinforcing sleeves 17 on all energy-absorbing plates 14 and is embedded in the spiral groove 18 on the inner wall of the reinforcing sleeve 17. In this invention, the internal filling structure of the energy-absorbing box 8 includes an energy-absorbing plate 14 and a helical spring 15. The energy-absorbing plates 14 are stacked and connected by the helical spring 15. When the energy-absorbing box 8 is impacted, the thin-walled outer shell 11 deforms along the position of the induction groove 13, thereby absorbing energy. At the same time, the energy-absorbing protrusions 19 in the energy-absorbing plate 14 can also absorb energy through deformation. The elasticity of the helical spring 15 can also absorb energy. Meanwhile, the helical spring 15 is connected to the reinforcing sleeve 17 by being embedded in the helical groove 18, which can share part of the impact force on the energy-absorbing plate 14, further improving the energy absorption effect of the energy-absorbing box 8. It can be seen that the energy-absorbing box 8 in this invention has excellent energy absorption performance.Meanwhile, in the energy-absorbing plate 14, the energy-absorbing protrusions 19 are formed by stamping the plate body 16. The structure is simple, and the arch-shaped energy-absorbing protrusions 19 have excellent support performance and can play a good role in impact resistance. Furthermore, the energy-absorbing plates 14 are stacked and connected by helical springs 15, making assembly very convenient. Compared with the existing complex energy-absorbing box 8, the energy-absorbing box 8 of the present invention has a very simple structure and is very easy to assemble, which can greatly reduce production costs and has excellent energy absorption effect.

[0030] In this invention, the energy absorption performance of the energy-absorbing mechanism is weaker than that of the energy-absorbing box 8, enabling the invention to achieve a two-stage energy absorption function. When the invention is subjected to an impact, the energy-absorbing mechanism deforms first. If the impact force is small, the energy-absorbing mechanism can return to its initial shape under the elastic action of the serpentine spring 5, allowing for reuse. If the impact force is greater than the force that the energy-absorbing mechanism can withstand, the outer anti-collision beam 1 will impact the inner anti-collision beam 2, at which point the energy-absorbing box 8 can perform its energy absorption function.

[0031] The base 9 protrudes outward from the outer wall of the thin-walled outer shell 11 on both sides, and mounting holes 20 are provided on the protruding parts. The base 9 is mounted on the frame of the car and is fixed by bolts installed at the mounting holes 20.

[0032] It should be understood that in the claims and description of this invention, all instances of "comprising..." should be understood as having an open meaning, that is, their meaning is equivalent to "containing at least...", and should not be understood as having a closed meaning, that is, their meaning should not be understood as "containing only...".

[0033] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A car anti-collision beam frame assembly, comprising an outer anti-collision beam and an inner anti-collision beam, characterized in that, An energy-absorbing mechanism is provided between the outer and inner anti-collision beams. The energy-absorbing mechanism includes several energy-absorbing units distributed along the length of the outer anti-collision beam. Each energy-absorbing unit includes two fixing blocks that are respectively fixed on the outer and inner anti-collision beams. A serpentine spring formed by bending sheet material is fixed between the two fixing blocks. The length directions of the serpentine springs in adjacent energy-absorbing units are parallel to each other, and the planes in which the serpentine springs are located in adjacent energy-absorbing units are perpendicular to each other. The inner anti-collision beam is symmetrically equipped with energy-absorbing boxes on one side of the outer anti-collision beam. Each energy-absorbing box includes a base, a top cover, a thin-walled outer shell fixedly disposed between the base and the top cover, and a filling structure located inside the thin-walled outer shell. The top cover is fixedly connected to the inner anti-collision beam. The side wall of the thin-walled outer shell has an annular guide groove arranged around its centerline. One end of the filling structure abuts against the base, and the other end abuts against the top cover. The filling structure includes multiple energy-absorbing plates stacked along the centerline of the thin-walled outer shell and helical springs for connecting the energy-absorbing plates. Each energy-absorbing plate includes a plate body with a circular through hole in the center. A reinforcing sleeve with a fixed circular structure is provided at a fixed position. The inner wall of the reinforcing sleeve has a spiral groove with a spiral structure, and the number of spiral grooves is between half a turn and one turn. An energy-absorbing protrusion with an arch-shaped structure formed by stamping the plate is fixed on the plate. The energy-absorbing protrusions on the plate are distributed in a circular array around the center line of the reinforcing sleeve. The energy-absorbing protrusions on the plate are located on the same side of the plate. The energy-absorbing protrusions in adjacent energy-absorbing plates are staggered and connected to the plate body of the adjacent energy-absorbing plate. The spiral spring passes through the reinforcing sleeves on all energy-absorbing plates and is embedded in the spiral groove of the inner wall of the reinforcing sleeve. The energy absorption performance of the energy-absorbing mechanism is weaker than that of the energy-absorbing box.

2. The automotive anti-collision beam frame assembly according to claim 1, characterized in that... The outer anti-collision beam has grooves for installing fixing blocks on the side facing the inner anti-collision beam and the inner anti-collision beam has grooves for installing fixing blocks on the side facing the outer anti-collision beam.

3. The automotive anti-collision beam frame assembly according to claim 2, characterized in that... The fixing block is embedded in the groove. The front end face of the fixing block connected to the outer anti-collision beam abuts against the inner side of the outer anti-collision beam, and the rear end face of the fixing block connected to the inner anti-collision beam abuts against the inner side of the inner anti-collision beam. The fixing block is welded to the side wall of the groove.

4. The automotive anti-collision beam frame assembly according to claim 2 or 3, characterized in that... Both the outer and inner anti-collision beams are formed by bending flat plates, and the flat plates are bent to form the grooves and protruding beams.

5. The automotive anti-collision beam frame assembly according to claim 4, characterized in that... The top cover is provided with a connecting groove, and the protruding beam on the inner anti-collision beam is embedded in the connecting groove.

6. The automotive anti-collision beam frame assembly according to claim 1, characterized in that... The energy-absorbing protrusions are located on the side of the plate facing the top cover. The energy-absorbing protrusions in the energy-absorbing plate closest to the top cover abut against the top cover, and the plate in the energy-absorbing plate closest to the base abuts against the base.

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