CN215097438U - Wavy pedestrian protection crossbeam and front bumper crossbeam assembly thereof - Google Patents

Abstract

The utility model discloses a wave-type pedestrian protection beam and a front bumper beam assembly thereof, which comprises a pedestrian protection beam body, wherein wave-shaped buffer components are respectively connected at two ends of the pedestrian protection beam body; the wave-modified damping assembly comprises a first modified surface and a fourth modified surface; the first deformation surface and the fourth deformation surface are respectively connected with the upper part and the lower part of an external connecting bracket; the first variable surface is connected with the upper end part of the pedestrian protection crossbeam body through a second variable surface; the fourth deformation surface is connected with the lower end part of the pedestrian protection cross beam body through the third deformation surface. The utility model discloses a first become the profile and the fourth becomes the profile and is connected with linking bridge for pedestrian's protection crossbeam is fixed with the main beam, becomes profile and third through the second and becomes the inboard deformation of profile towards the automobile body, can reduce the moment of flexure that pedestrian's shank received, compares with traditional rigidity pedestrian protection crossbeam and can increase 50% buffer space at least.

Description

Wavy pedestrian protection crossbeam and front bumper crossbeam assembly thereof

Technical Field

The utility model relates to a car front bumper crossbeam safety coefficient, concretely relates to wavy pedestrian protection crossbeam and front bumper crossbeam assembly thereof.

Background

Automobile technology is gradually improved, and the safety performance requirement is higher and higher. The automobile needs to be provided with a high-strength automobile body structure to ensure the safety of passengers in the automobile, and needs to be provided with an enough energy absorption buffer area to ensure the safety of pedestrians outside the automobile, so that the development of the front end bumper structure of the automobile is a great challenge. In the event of a human-vehicle collision, lower limb injuries are often caused by a vehicle front end bumper structure, so improving the bumper structure becomes an important means of alleviating lower limb injuries.

Pedestrian protection is divided into head protection and leg protection, and leg protection safety requires that the risk of injury to the legs of a pedestrian is reduced as much as possible during a pedestrian-vehicle collision. The height of a high-strength front cross beam in the front bumper structure is equivalent to that of the knees of a pedestrian, and the knees of the pedestrian are bent at an overlarge angle in the impact process, so that the ligaments of the legs of the pedestrian are easily pulled. The pedestrian protection crossbeam in the front bumper structure is arranged highly and is equivalent with pedestrian's shank lower extreme, can bounce pedestrian's shank in the striking process to reduce pedestrian's knee angle of buckling, and then reduce the risk that pedestrian's knee ligament was pulled. However, if the structural strength of the pedestrian protection cross beam is too high, impact can be caused on the lower leg of the pedestrian, and the risk of fracture of the lower leg of the pedestrian is increased.

Referring to fig. 1, a main beam 1, an end plate 2, an energy absorption box 3 and a connecting bracket 4 in a front bumper beam assembly are parts of the front beam assembly, two ends of a pedestrian protection beam 5 are connected with the lower end of the connecting bracket 4 through rivets or inserting pieces, the upper end of the connecting bracket 4 is connected with the main beam 1 through welding, and the end plate 2 is connected with a vehicle body longitudinal beam to complete the fixation of the front beam assembly.

Referring to fig. 1 to 2, when the leg impactor impacts, the front beam is subjected to a large bending moment, the energy-absorbing box 3 and the connecting bracket 4 need to have a sufficiently strong rigidity, the pedestrian protection beam 5 needs to provide sufficient resilience to the leg impactor, so as to reduce the bending degree of the knee of the leg impactor to meet the limit requirement of knee ligament elongation (MCL, PCL/ACL), and the connecting strength between the upper end of the connecting bracket 4 and the main beam 1 is high through a weld joint, which may cause the pedestrian protection beam 5 to lack a buffering performance, cause the shank part of the leg impactor to bear a large bending moment, and hardly meet the limit requirement of the shank bending moment (Tibia).

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model provides a wavy pedestrian protects crossbeam and front bumper crossbeam assembly thereof, this structure can guarantee the rigidity of pedestrian's protection crossbeam, provides sufficient support, can increase buffer space simultaneously again, reduces the moment of flexure that the shank received, satisfies the requirement that pedestrian protected shank hit.

For solving the technical problem the utility model discloses the technical scheme who adopts does:

a wave-type pedestrian protection crossbeam comprises a pedestrian protection crossbeam body, wherein wave-shaped deformation buffer assemblies are respectively connected to two ends of the pedestrian protection crossbeam body; the wave-modified damping assembly comprises a first modified surface and a fourth modified surface; the first deformation surface and the fourth deformation surface are respectively connected with the upper part and the lower part of an external connecting bracket; the first variable surface is connected with the upper end part of the pedestrian protection crossbeam body through a second variable surface; the fourth deformation surface is connected with the lower end part of the pedestrian protection cross beam body through the third deformation surface.

Preferably as this embodiment, pedestrian protection crossbeam body includes backup pad and bottom suspension fagging, go up and be connected through the intermediate junction board between backup pad and the bottom suspension fagging.

Preferably, the longitudinal cross section of the intermediate connecting plate is of an outward convex semi-circular arc structure.

Preferably, the first variable surface and the second variable surface are an integral molding structure, and the fourth variable surface and the third variable surface are an integral molding structure.

Preferably, the first deformation surface, the second deformation surface, the pedestrian protection cross beam body, the third deformation surface and the fourth deformation surface form a wave deformation buffer structure with each other.

Preferably, the end of the first variable surface is fixedly connected with the upper part of the external connecting bracket through a bolt or an insert.

Preferably, the end of the fourth modified surface is connected with the lower part of the external connecting bracket by means of arranging a mounting hole.

An embodiment of the utility model provides a front bumper crossbeam assembly, including linking bridge, including aforementioned wavy pedestrian protection crossbeam, linking bridge and wavy pedestrian protection crossbeam fixed connection, linking bridge's upper end is connected with the main beam through the welding.

Compared with the prior art, the utility model following beneficial effect has:

1. the wave-type pedestrian protection beam and the front bumper beam assembly thereof are connected with the connecting bracket through the first variable surface and the fourth variable surface, so that the pedestrian protection beam is fixed with the main beam, and a stable beam system is formed through the pedestrian protection beam, the connecting bracket and the main beam; through second become profile and third become profile and pedestrian protection crossbeam body and be connected, when the pedestrian receives the impact at the shank, through second become the profile and the deformation of third variant towards the automobile body inboard, can reduce the moment of flexure that the pedestrian shank received, can increase 50% buffering space at least with traditional rigidity pedestrian protection crossbeam.

2. Wave formula pedestrian protection crossbeam, through the intermediate junction board design with pedestrian protection crossbeam body for evagination half-circular arc structure, like this when the pedestrian receives the impact at the shank, because the evagination half-circular arc structure of intermediate junction board, can further play the effect of buffering.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural view of a prior art front bumper beam assembly;

FIG. 2 is a schematic structural view of a prior art front bumper beam assembly;

fig. 3 is a schematic structural view of the wavy pedestrian protection cross beam according to the present invention;

fig. 4 is a schematic structural view of the pedestrian protection cross beam body according to the present invention;

fig. 5 is a schematic structural view of the front bumper beam assembly of the present invention.

Shown in the figure: 1. a main cross beam; 2. an end plate; 3. an energy absorption box; 4. connecting a bracket; 5. a pedestrian protection cross member; 6. a wave-form cushioning assembly; 601. a first variable profile; 602. a second variable profile; 603. a third variable profile; 604. a fourth variable profile; 7. a pedestrian protection cross beam body; 701. an upper support plate; 702. a lower support plate; 703. an intermediate connecting plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 3 to 4, the embodiment of the utility model provides a wavy pedestrian protection crossbeam, specifically include pedestrian protection crossbeam body 7, pedestrian protection crossbeam body 7 is as pedestrian protection crossbeam's major structure, the both ends of walking pedestrian protection crossbeam body 7 are connected with wave variant buffering subassembly 6 respectively, the rigidity that both can guarantee pedestrian protection crossbeam through wave variant buffering subassembly 6 provides sufficient support, when pedestrian's shank receives the collision simultaneously, the deformation through wave variant buffering subassembly 6 can increase the buffering space again, reduce the moment of flexure that the shank received, satisfy the requirement that pedestrian protected the shank strikes.

Referring to fig. 3 to 4, the wave-shaped cushioning assembly 6 will be described in detail, in this embodiment, the wave-shaped cushioning assembly 6 includes a first variable surface 601 and a fourth variable surface 604, wherein the first variable surface 601 and the fourth variable surface 604 are respectively connected with the upper portion and the lower portion of the outer connecting bracket 4, the upper end of the connecting bracket 4 is connected with the main cross beam 1 by welding, and the end plate 2 is connected with the vehicle body longitudinal beam to complete the fixing of the front cross beam assembly. The first variable surface 601 and the fourth variable surface 604 realize the connection between the pedestrian protection cross beam body 7 and the connecting bracket 4, enhance the bending rigidity of the parts, and ensure that the pedestrian protection cross beam body 7 has a buffer space and does not change the support strength of the parts. The pedestrian protection beam body 7 is fixed with the main beam 1 through the connecting support 4, and a stable front bumper beam safety system is formed through the pedestrian protection beam body 7, the connecting support 4 and the main beam 1.

Referring to fig. 3 to 4, in the present embodiment, the first variable profile 601 is connected to the upper end portion of the pedestrian protection crossmember body 7 by the second variable profile 602, and the fourth variable profile 604 is connected to the lower end portion of the pedestrian protection crossmember body 7 by the third variable profile 603. When the leg striker impacts, after the pedestrian protection cross beam body 7 deforms towards the inner side of the vehicle body, the second deformation surface 602 and the third deformation surface 603 deform accordingly, compared with the original single vertical surface design mode (see fig. 2), the buffer space is increased by designing the second deformation surface 602 and the third deformation surface 603, and the problem of insufficient buffer performance is solved. In the present application, the first variable-profile surface 601, the second variable-profile surface 602, the pedestrian protection cross member body 7, the third variable-profile surface 603, and the fourth variable-profile surface 604 constitute a wave deformation buffer structure, which can increase a buffer space by at least 50% compared with a conventional structure.

Referring to fig. 3 to 4, the pedestrian protection cross member body 7 includes an upper support plate 701 and a lower support plate 702, and the upper support plate 701 and the lower support plate 702 are connected by an intermediate connection plate 703. Wherein, the longitudinal cross section of the middle connecting plate 703 is a convex semi-arc structure. The middle connecting plate 703 of the pedestrian protection beam body 7 is designed into a convex semi-circular arc structure, so that when a pedestrian is impacted on a leg, the convex semi-circular arc structure of the middle connecting plate 703 can further play a role in buffering.

In this embodiment, the end of the first variable surface 601 is fixedly connected with the upper part of the external connecting bracket 4 by a bolt or a plug. The end of the fourth variable surface 604 is connected with the lower part of the external connecting bracket 4 by means of the installation hole. Wherein, the stamping angle and the material thickness of the first to fourth variable surfaces (including the first variable surface 601, the second variable surface 602, the third variable surface 603 and the fourth variable surface 604) are adjusted, and the supporting strength and the buffering space are improved by adjusting the stamping angle and the material thickness. The punching press angle of pedestrian protection crossbeam body, thick and the opening size of material, through adjustment punching press angle, support intensity and buffering space are improved to thick and the opening size of material. In a further optimized embodiment, the first variable-profile surface 601 and the second variable-profile surface 602 are of an integral molding structure, and the fourth variable-profile surface 604 and the third variable-profile surface 603 are of an integral molding structure, so that the rigidity of the pedestrian protection cross beam can be ensured.

Referring to fig. 5, an embodiment of the present invention provides a front bumper beam assembly, including linking bridge 4, including aforementioned wavy pedestrian protection crossbeam, linking bridge 4 and wavy pedestrian protection crossbeam fixed connection, linking bridge 4's upper end is connected with main beam 1 through the welding.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides a wavy pedestrian protection crossbeam, includes pedestrian protection crossbeam body (7), its characterized in that: two ends of the pedestrian protection cross beam body (7) are respectively connected with a wave deformation buffer assembly (6); the wave deformation buffer assembly (6) comprises a first variable surface (601) and a fourth variable surface (604); the first variable profile (601) and the fourth variable profile (604) are respectively connected with the upper part and the lower part of the external connecting bracket (4); the first variable profile (601) is connected with the upper end part of the pedestrian protection beam body (7) through a second variable profile (602); the fourth variable profile (604) is connected with the lower end part of the pedestrian protection beam body (7) through the third variable profile (603).

2. The wavy pedestrian protection cross-member of claim 1, wherein: pedestrian protection crossbeam body (7) are including last backup pad (701) and bottom suspension fagging (702), go up and be connected through intermediate junction board (703) between backup pad (701) and bottom suspension fagging (702).

3. The wavy pedestrian protection cross-member of claim 2, wherein: the longitudinal cross section of the middle connecting plate (703) is of an outward convex semi-circular arc structure.

4. The wavy pedestrian protection cross-member of claim 1, wherein: the first variable-profile surface (601) and the second variable-profile surface (602) are of an integral forming structure, and the fourth variable-profile surface (604) and the third variable-profile surface (603) are of an integral forming structure.

5. The wavy pedestrian protection cross-member of claim 1, wherein: the first variable profile (601), the second variable profile (602), the pedestrian protection beam body (7), the third variable profile (603) and the fourth variable profile (604) form a wave deformation buffer structure.

6. The wavy pedestrian protection cross-member of claim 1, wherein: the tail end of the first variable-profile surface (601) is fixedly connected with the upper part of an external connecting support (4) through a bolt or an inserting sheet.

7. The wavy pedestrian protection cross-member of claim 1, wherein: the tail end of the fourth variable-profile surface (604) is connected with the lower part of the external connecting bracket (4) in a mode of arranging a mounting hole.

8. Front bumper beam assembly comprising a connecting bracket (4), characterized in that it comprises an undulating pedestrian protection beam according to any one of claims 1 to 7, said connecting bracket (4) being fixedly connected to the undulating pedestrian protection beam, the upper end of said connecting bracket (4) being connected to the main beam (1) by welding.

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