Energy absorption box for pedestrian protection beam

Abstract

The utility model relates to the technical field of automobile accessories. An energy absorption box for a pedestrian protection beam comprises an energy absorption box body which is of a Z-shaped structure. The energy absorption box body comprises an auxiliary frame connecting part, a middle connecting part and a pedestrian protection beam connecting part which are sequentially connected from back to front in the axial direction, the middle connecting part is of a structure shaped like a Chinese character'ri ', and the upper end of the structure shaped like the Chinese character'ri' extends backwards to form a first square frame structure. The pedestrian protection beam connecting part is a second square frame structure formed by forwards extending the lower end part of the B-shaped structure; the left-right length of the first square frame structure is equal to that of the second square frame structure, and the longitudinal length of the first square frame structure is larger than that of the second square frame structure. The structure of the energy absorption box is optimized to be of a Z-shaped structure, bending energy absorption can be conveniently achieved after axial stress is conducted, and then the energy absorption effect of pedestrian anti-collision protection is achieved.

Description

Technical Field

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[0001] The utility model relates to the technical field of automotive parts, specifically an energy-absorbing box. Background Art

[0002] The number of automobiles in use is increasing. Due to its high specific strength, aluminum alloy is widely used in various structural components of automobiles. Especially in the field of pedestrian protection beams, the application of aluminum alloy is increasing. In addition, the requirements for automotive safety levels are also getting higher and higher. It is necessary to not only protect the vehicle occupants but also protect pedestrians and reduce the harm to pedestrians caused by traffic accidents. Therefore, it is required that the pedestrian protection beam plays an energy-absorbing role during a collision, so it is required that the protection beam can be bent to absorb energy during a collision.

[0003] The energy-absorbing box usually adopts a hollow columnar structure (such as a square or circular cross-section), and the surface is designed with predetermined folds or grooves. These structures will gradually collapse along a preset path when subjected to impact, avoiding sudden fracture. For example, the energy-absorbing box structure disclosed in the automotive pedestrian protection structure with the publication number CN206954173U.

[0004] Currently, there is a lack of an energy-absorbing box structure that can achieve bending energy absorption. Summary of the Utility Model

[0005] Aiming at the problems existing in the prior art, the utility model provides an energy-absorbing box for a pedestrian protection beam to solve at least one of the above technical problems.

[0006] To achieve the above object, the utility model provides an energy-absorbing box for a pedestrian protection beam, including an energy-absorbing box body, characterized in that the energy-absorbing box body is in a Z-shaped structure;

[0007] The energy-absorbing box body includes a subframe connection part, an intermediate connection part, and a pedestrian protection beam connection part that are sequentially connected from back to front along the axial direction. The intermediate connection part is a structure in the shape of a Chinese character 'Ri' with a cross-section in the shape of a rectangle. The subframe connection part is a first square structure that extends backward from the upper end of the structure in the shape of a Chinese character 'Ri'. The pedestrian protection beam connection part is a second square structure that extends forward from the lower end of the structure in the shape of a Chinese character 'Ri';

[0008] The left and right lengths of the first square structure are equal to the left and right lengths of the second square structure, and the longitudinal length of the first square structure is greater than the longitudinal length of the second square structure.

[0009] By optimizing the structure of the energy-absorbing box to be in a Z-shaped structure, the utility model facilitates bending energy absorption after axial force application, thereby achieving the energy-absorbing effect of pedestrian anti-collision protection.

[0010] Further preferably, the longitudinal length of the first square structure is 1 / 2 of the transverse length of the first square structure.

[0011] More preferably, the longitudinal length of the second frame structure is less than 1 / 2 of the longitudinal length of the first frame structure, and greater than 2 / 5 of the longitudinal length of the first frame structure.

[0012] More preferably, the length of the energy-absorbing box body in the left-right direction is 85mm-90mm;

[0013] The longitudinal length of the energy-absorbing box body is 75mm-70mm.

[0014] More preferably, the wall thickness of the energy-absorbing box body is 1.8mm-2.2mm.

[0015] More preferably, the main body of the energy-absorbing box is made of 6082 aluminum-magnesium alloy.

[0016] More preferably, crushing holes are provided at the left and right corners of the lower end of the first square structure.

[0017] More preferably, the first square frame structure has mounting holes arranged side by side on both the upper and lower sides, and the mounting holes are located behind the crushing holes.

[0018] More preferably, the first square frame structure is used to insert a subframe, and the end of the subframe inserted into the first square frame structure is connected to the first square frame structure by bolts.

[0019] More preferably, the end of the second frame structure furthest from the first frame structure is welded and fixedly connected to the pedestrian protection beam.

[0020] More preferably, the lower rear end of the intermediate connecting portion is provided with a lower oblique cut surface;

[0021] The upper front end of the intermediate connecting part is provided with an upper oblique cut surface;

[0022] Both the upper and lower oblique cut surfaces slope forward from top to bottom.

[0023] More preferably, the angle between the lower oblique cut surface and the vertical plane is greater than the angle between the upper oblique cut surface and the vertical plane.

[0024] Beneficial effects:

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] This invention achieves lightweight design while featuring a simple structure, uniform wall thickness distribution, high stability, easy manufacturing process, and satisfactory stiffness and modal properties, along with excellent energy absorption. Attached Figure Description

[0027] Figure 1 A structural schematic diagram of the first specific embodiment of the present utility model in the use state;

[0028] Figure 2 A structural schematic diagram of the first specific embodiment of the present utility model;

[0029] Figure 3 An axial end face schematic diagram of the energy-absorbing box of the first specific embodiment of the present utility model;

[0030] Figure 4 A structural schematic diagram of the first specific embodiment of the present utility model from another perspective;

[0031] Figure 5 A structural schematic diagram of the first specific embodiment of the present utility model from another perspective.

[0032] Where: 1 is the first square structure, 2 is the second square structure, 3 is the intermediate connecting part, 4 is the subframe, 5 is the pedestrian protection beam, 11 is the crushing hole, 12 is the mounting hole, 31 is the upper inclined section, 32 is the upper inclined section. Specific embodiments

[0033] The following further describes the present utility model with reference to the accompanying drawings.

[0034] See Figures 1 to 5 , specific embodiment 1: An energy-absorbing box for a pedestrian protection beam, comprising an energy-absorbing box body, and the energy-absorbing box body has a Z-shaped structure; the energy-absorbing box body includes a subframe connecting part, an intermediate connecting part 3, and a pedestrian protection beam connecting part that are sequentially connected from back to front along the axis. The intermediate connecting part 3 has a structure of a Chinese character "ri" with a cross-section in the shape of a rectangle. The subframe connecting part is a first square structure 1 extending backward from the upper end of the structure of the Chinese character "ri", and the pedestrian protection beam connecting part is a second square structure 2 extending forward from the lower end of the structure of the Chinese character "ri"; the left and right lengths of the first square structure 1 are equal to the left and right lengths of the second square structure 2, and the longitudinal length of the first square structure ̄1 is greater than the longitudinal length of the second square structure 2. The present utility model optimizes the structure of the energy-absorbing box to be a Z-shaped structure, which is convenient for realizing bending energy absorption after axial force application, and further realizing the energy-absorbing effect of pedestrian anti-collision protection. The axis direction of the present utility model refers to the length direction parallel to the opening of the energy-absorbing box body.

[0035] After the structure of the energy-absorbing box body is an extruded rectangular profile, by cutting the opposite corners, a first square structure with only the upper square frame and a second square structure with only the lower square frame are formed.

[0036] The longitudinal length of the first square structure 1 is 1 / 2 of the transverse length of the first square structure 1. The longitudinal length of the second square structure 2 is less than 1 / 2 of the longitudinal length of the first square structure 1 and greater than 2 / 5 of the longitudinal length of the first square structure 1.

[0037] The length of the main body of the energy-absorbing box in the left-right direction is 85mm-90mm; the length of the main body of the energy-absorbing box in the longitudinal direction is 75mm-70mm.

[0038] The wall thickness of the main body of the energy-absorbing box is 1.8mm-2.2mm.

[0039] The main body of the energy-absorbing box is made of 6082 aluminum-magnesium alloy.

[0040] Crushing holes 11 are provided at the left and right corners of the lower end of the first square structure 1.

[0041] The first frame structure 1 has mounting holes 12 arranged side by side on both the top and bottom sides, and the mounting holes 12 are located behind the crushing holes 11.

[0042] The first frame structure 1 is used to insert the subframe 4, and the end of the subframe 4 inserted into the first frame structure 1 is connected to the first frame structure 1 by bolts. The end of the second frame structure 2 away from the first frame structure 1 is welded and fixedly connected to the pedestrian protection beam 5.

[0043] The lower rear end of the intermediate connecting part is provided with a lower oblique cut surface 32; the upper front end of the intermediate connecting part is provided with an upper oblique cut surface 31; both the upper oblique cut surface 31 and the lower oblique cut surface 32 are inclined forward from top to bottom. The angle between the lower oblique cut surface 32 and the vertical plane is greater than the angle between the upper oblique cut surface 31 and the vertical plane.

[0044] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. An energy absorption box for pedestrian protection beams comprising an energy absorption box body, characterized in that, The energy absorption box body is in a Z-shaped structure; The energy absorption box body comprises a sub-frame connecting portion, an intermediate connecting portion and a pedestrian protection beam connecting portion connected in sequence from back to front along the axial direction, the intermediate connecting portion is a sun-shaped structure with a sun-shaped cross section, the sub-frame connecting portion is a first square frame structure with the upper end of the sun-shaped structure extending backward, and the pedestrian protection beam connecting portion is a second square frame structure with the lower end of the sun-shaped structure extending forward; The left and right lengths of the first square frame structure are equal to the left and right lengths of the second square frame structure, and the longitudinal length of the first square frame structure is greater than the longitudinal length of the second square frame structure.

2. The energy absorption box for pedestrian protection beam according to claim 1, characterized in that: The longitudinal length of the first square frame structure is 1 / 2 of the transverse length of the first square frame structure.

3. The energy absorption box for pedestrian protection beam according to claim 1, characterized in that: The longitudinal length of the second square frame structure is less than 1 / 2 of the longitudinal length of the first square frame structure and greater than 2 / 5 of the longitudinal length of the first square frame structure.

4. The energy absorption box for pedestrian protection beam according to claim 1, characterized in that: The length of the energy absorption box body in the left-right direction is 85-90 mm. The longitudinal length of the energy absorption box body is 75-70 mm.

5. The energy absorption box for pedestrian protection beam according to claim 1, characterized in that: The wall thickness of the energy absorption box body is 1.8-2.2 mm.

6. The energy absorbing box for pedestrian protection beam according to claim 1, characterized in that: The material of the energy absorption box body is 6082 aluminum-magnesium alloy.

7. The energy absorption box for pedestrian protection beam according to claim 1, characterized in that: Crushing holes are arranged at the left and right corners of the lower end of the first square frame structure.

8. The energy absorption box for pedestrian protection beam according to claim 7, characterized in that: Mounting holes are arranged on the upper and lower sides of the first square frame structure in parallel, and the mounting holes are located behind the crushing holes.

9. The energy absorbing box for pedestrian protection beam according to claim 1, characterized in that: The end of the sub-frame inserted into the first square frame structure is connected to the first square frame structure by bolts.

10. The energy absorbing box for pedestrian protection beam according to claim 1, characterized in that: A lower bevel is arranged at the rear lower end of the intermediate connecting portion. An upper bevel is arranged at the front upper end of the intermediate connecting portion. The upper bevel and the lower bevel are both inclined forward from top to bottom. The included angle between the lower bevel and the vertical plane is greater than the included angle between the upper bevel and the vertical plane.

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