Energy-absorbing structure of vehicle side pillars and automobile

Abstract

This invention discloses a vehicle side pillar energy-absorbing structure and a vehicle. The vehicle side pillar energy-absorbing structure includes a sill assembly and an energy-absorbing box. The sill assembly extends along the longitudinal direction, forming a first space inside. The energy-absorbing box is fixedly connected to the sill assembly and disposed within the first space. The energy-absorbing box is a hollow box-shaped structure, and there is at least one energy-absorbing box. The dimensions of the at least one energy-absorbing box gradually decrease from the outside to the inside in the longitudinal direction. By setting the above-mentioned energy-absorbing box, when the energy-absorbing box is subjected to an impact force from the outside to the inside, the energy-absorbing box is more likely to collapse from the outside to the inside, thereby achieving collapse energy absorption. Compared with the case where a reinforcing plate extending along the longitudinal direction breaks upon impact, the energy-absorbing box has a better energy absorption effect, can slow down the intrusion speed, and can improve the ability of the vehicle side pillar energy-absorbing structure to resist side collisions.

Description

Technical Field

[0001] This invention relates to the field of automotive structures, and in particular to an energy-absorbing structure for a vehicle body side pillar and an automobile. Background Technology

[0002] Side impact testing is crucial for the safety of passenger vehicles. For electric vehicles, the need to protect the battery pack under the floor is even more urgent, thus requiring higher standards of protection against side impacts.

[0003] In related technologies, the method of setting a reinforcing plate inside the threshold along the threshold direction to improve structural strength has poor energy absorption effect and there is room for improvement. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a vehicle side pillar energy-absorbing structure, wherein the vehicle side pillar energy-absorbing structure has an energy-absorbing box that can collapse and absorb energy in the left-right direction, resulting in better energy absorption and improving the vehicle side pillar energy-absorbing structure's ability to resist side collisions.

[0005] The present invention also proposes a car having the above-mentioned energy-absorbing structure for the side pillars of the vehicle body.

[0006] According to a first aspect of the present invention, a vehicle side pillar energy-absorbing structure includes: a door sill assembly, the length of which extends in a front-rear direction, and a first space is formed inside the door sill assembly; an energy-absorbing box, which is fixedly connected to the door sill assembly and disposed in the first space, the energy-absorbing box being a hollow box-shaped structure, and at least one energy-absorbing box, wherein the size of the at least one energy-absorbing box gradually decreases from the outside to the inside in the front-rear direction.

[0007] According to the energy-absorbing structure of the vehicle side pillar of the present invention, by setting the above-mentioned energy-absorbing box, when the energy-absorbing box is subjected to an impact force from the outside to the inside, the energy-absorbing box is more likely to collapse from the outside to the inside, thereby realizing energy absorption through collapse. Compared with the case where the reinforcing plate extending in the front and rear direction breaks due to impact, the energy-absorbing box has a better energy absorption effect, can slow down the intrusion speed, and can improve the ability of the vehicle side pillar energy-absorbing structure to resist side collisions.

[0008] In some embodiments, the energy-absorbing box includes a first energy-absorbing box, the first energy-absorbing box including a first sidewall and a second sidewall spaced apart in a front-rear direction, the first sidewall and the second sidewall extending gradually from the outside to the inside toward each other.

[0009] In some embodiments, the first energy-absorbing box includes a third sidewall and a fourth sidewall spaced apart in the vertical direction. The third sidewall is connected to the upper ends of the first sidewall and the second sidewall, respectively, and the fourth sidewall is connected to the lower ends of the first sidewall and the second sidewall, respectively. The third sidewall and the fourth sidewall are arranged in parallel. The first sidewall and the second sidewall are symmetrically arranged along the vertical center plane of the first energy-absorbing box.

[0010] In some embodiments, the energy-absorbing box further includes a second energy-absorbing box, which is disposed close to the inside of the first energy-absorbing box. The second energy-absorbing box has an opening that opens toward the first energy-absorbing box. At least a portion of the first energy-absorbing box extends into the second energy-absorbing box through the opening, and one end of the first energy-absorbing box facing the second energy-absorbing box is spaced apart from the second energy-absorbing box.

[0011] In some embodiments, the second energy-absorbing box includes a fifth sidewall and a sixth sidewall spaced apart in the vertical direction, the fifth sidewall and the sixth sidewall being arranged in parallel; the second energy-absorbing box also includes a seventh sidewall and an eighth sidewall spaced apart in the front-back direction, the upper and lower ends of the seventh sidewall being connected to the fifth sidewall and the sixth sidewall respectively, the upper and lower ends of the eighth sidewall being connected to the fifth sidewall and the sixth sidewall respectively, the seventh sidewall including a plurality of sequentially connected and intersecting first sub-walls, the eighth sidewall including a plurality of sequentially connected and intersecting second sub-walls; the size of the second energy-absorbing box in the front-back direction gradually decreases from the outside to the inside, or the size of the second energy-absorbing box in the front-back direction is the same.

[0012] In some embodiments, the seventh sidewall includes three first sub-walls, and the eighth sidewall includes three second sub-walls; wherein the included angle between two adjacent first sub-walls is the same, and the included angle between two adjacent second sub-walls is the same; and / or, the fifth sidewall and the sixth sidewall extend horizontally, the first sub-wall located in the middle extends vertically, and the second sub-wall located in the middle extends vertically.

[0013] In some embodiments, the seventh sidewall and the eighth sidewall are symmetrically arranged along the vertical center plane of the second energy-absorbing box; and / or, the second energy-absorbing box has a dimension L1 in the front-to-back direction and a dimension L2 in the vertical direction, wherein L1 and L2 satisfy: 0.9≤L2 / L1≤1.3.

[0014] In some embodiments, the center surfaces of the first energy-absorbing box and the second energy-absorbing box are located on the same plane.

[0015] In some embodiments, the sill assembly includes: an outer sill plate and an inner sill plate, the outer sill plate and the inner sill plate together defining the first space; the first energy-absorbing box is fixedly connected to the outer sill plate, and the second energy-absorbing box is fixedly connected to the inner sill plate.

[0016] In some embodiments, the height centerline of the first energy-absorbing box coincides with the height centerline of the outer sill plate, and the height centerline of the second energy-absorbing box coincides with the height centerline of the inner sill plate.

[0017] In some embodiments, the structural strength of the second energy-absorbing box is greater than that of the first energy-absorbing box.

[0018] According to a second aspect of the present invention, an automobile includes a side pillar energy-absorbing structure, which is a side pillar energy-absorbing structure according to a first aspect of the present invention; a crossbeam extending in a left-right direction and fixedly connected to the door sill assembly; and an energy-absorbing box and the crossbeam being disposed opposite each other in the left-right direction.

[0019] According to the present invention, by providing the energy-absorbing structure of the vehicle body side pillars described in the first aspect, the vehicle's ability to resist side collisions can be improved.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a vehicle body side pillar energy absorption structure according to an embodiment of the present invention; Figure 2 This is an exploded view of a vehicle body side pillar energy-absorbing structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a first energy-absorbing box according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of a vehicle body side pillar energy-absorbing structure according to an embodiment of the present invention; Figure 5 This is another cross-sectional view of a vehicle body side pillar energy-absorbing structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a second energy-absorbing box according to an embodiment of the present invention; Figure 7 This is a cross-sectional view of the second energy-absorbing box according to an embodiment of the present invention.

[0022] Figure label: 100; Door sill assembly 1; Door sill outer panel 11; Door sill inner panel 12; Energy absorption box 2; First energy-absorbing box 21; first side wall 211; second side wall 212; third side wall 213; fourth side wall 214; vertical center surface 21a of the first energy-absorbing box; welding edge 215 of the first energy-absorbing box; Second energy-absorbing box 22; fifth side wall 221; sixth side wall 222; seventh side wall 223; first sub-wall 2231; eighth side wall 224; second sub-wall 2241; vertical center surface 22a of the second energy-absorbing box; opening 22b; welding edge 225 of the second energy-absorbing box; Crossbeam 200; Collision column 300. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0025] The energy-absorbing structure 100 for the vehicle side pillars of the present invention, according to a first aspect embodiment, is described below with reference to the accompanying drawings.

[0026] According to an embodiment of the present invention, the vehicle body side pillar energy absorption structure 100, such as Figure 1 and Figure 2 As shown, the vehicle side pillar energy absorption structure 100 includes: a door sill assembly 1 and an energy absorption box 2. The length of the door sill assembly 1 extends in the front-rear direction, and a first space is formed inside the door sill assembly 1. The energy absorption box 2 is fixedly connected to the door sill assembly 1 and is disposed in the first space. The energy absorption box 2 is a hollow box structure. There is at least one energy absorption box 2. The size of at least one energy absorption box 2 in the front-rear direction gradually decreases from the outside to the inside.

[0027] It is understood that the energy-absorbing structure 100 of the vehicle body side pillar is used on the vehicle body, therefore the front-rear direction, left-right direction, etc. of this invention are all established with the vehicle as the reference. The door sill assembly 1 extends in the front-rear direction, that is, the door sill assembly 1 extends in the front-rear direction of the vehicle.

[0028] Side impact testing is crucial for passenger vehicle safety. For models aiming for a five-star rating in China's C-NCAP (China New Car Assessment Program) and those exported to international markets, side pole impact testing must meet the requirements of Regulation R135, "Uniform Provisions on Occupant Protection in Side Pole Impacts," issued by the United Nations Economic Commission for Europe. Furthermore, for electric vehicles, the need for protection of the battery pack under the floor is even more urgent, thus requiring even higher standards for side impact protection.

[0029] Side pole impact test refers to a test that simulates a vehicle skidding out of control and crashing its side directly into a rigid columnar object such as a utility pole, tree, or lamppost on the roadside.

[0030] In related technologies, the method of setting a reinforcing plate inside the threshold along the threshold direction to improve structural strength has poor energy absorption effect and there is room for improvement.

[0031] Therefore, this embodiment of the invention proposes a vehicle body side pillar energy-absorbing structure 100, in which an energy-absorbing box 2 is provided in the first space inside the sill assembly 1. The energy-absorbing box 2 is fixedly connected to the sill assembly 1, which can improve the installation stability of the energy-absorbing box 2. One energy-absorbing box 2 can be provided inside the sill assembly 1, or multiple energy-absorbing boxes 2 can be provided.

[0032] The energy-absorbing box 2 is a hollow box-shaped structure, and at least one energy-absorbing box 2 has a dimension that gradually decreases from the outside to the inside in the front-rear direction. The direction from the outside to the inside refers to the direction from the outside of the vehicle to the inside in the left-right direction. It should be noted that the vehicle has side pillar energy-absorbing structures 100 on both the left and right sides. The side pillar energy-absorbing structures 100 on both sides have the same structure and are symmetrically arranged in the left-right direction. Therefore, this invention uses the inside-outside direction for description, rather than the left-right direction.

[0033] In side pole impact tests, the side of the vehicle body is directly subjected to impact forces directed towards the interior of the car in the left-right direction. Therefore, this invention designs the energy-absorbing box 2 with its dimensions gradually decreasing from the outside to the inside in the front-rear direction. This makes it easier for the energy-absorbing box 2 to collapse inwards when subjected to an impact force from the outside, thus achieving energy absorption through collapse. Compared to a reinforcing plate extending in the front-rear direction breaking upon impact, the energy-absorbing box 2 in this embodiment of the invention has a better energy absorption effect, improving the ability of the vehicle body side pole energy-absorbing structure 100 to resist side impacts.

[0034] According to the embodiment of the present invention, the energy-absorbing structure 100 of the vehicle side pillar is provided with the above-mentioned energy-absorbing box 2. When the energy-absorbing box 2 is subjected to an impact force from the outside to the inside, the energy-absorbing box 2 is more likely to collapse from the outside to the inside, thereby realizing energy absorption through collapse. Compared with the case where the reinforcing plate extending in the front-rear direction breaks due to impact, the energy-absorbing box 2 has a better energy absorption effect, can slow down the intrusion speed, and can improve the ability of the vehicle side pillar energy-absorbing structure 100 to resist side collisions.

[0035] In some embodiments of the present invention, such as Figure 2 and Figure 3 As shown, the energy-absorbing box 2 includes a first energy-absorbing box 21. The first energy-absorbing box 21 includes a first sidewall 211 and a second sidewall 212 that are spaced apart in the front-back direction. The first sidewall 211 and the second sidewall 212 gradually extend from the outside to the inside toward each other.

[0036] The first energy-absorbing box 21 is a hollow box structure. The first energy-absorbing box 21 includes a first sidewall 211 and a second sidewall 212 spaced apart in the front-back direction. The first sidewall 211 and the second sidewall 212 gradually extend from the outside to the inside toward each other, so that the size of the first energy-absorbing box 21 in the front-back direction gradually decreases from the outside to the inside.

[0037] In this way, when the first energy-absorbing box 21 is subjected to an impact force from the outside in, the energy-absorbing box 21 is more likely to collapse from the outside in; and the two side walls along the front and rear directions, namely the first side wall 211 and the second side wall 212, gradually extend towards each other, which can make the collapse of the two side structures of the first energy-absorbing box 21 more balanced, improve the situation of the first energy-absorbing box 21 bending or deflecting, and make the energy absorption effect of the first energy-absorbing box 21 better, which can slow down the intrusion speed and improve the ability of the vehicle side pillar energy-absorbing structure 100 to resist side collisions.

[0038] In some embodiments of the present invention, such as Figure 3 and Figure 4 As shown, the first energy-absorbing box 21 includes a third sidewall 213 and a fourth sidewall 214 spaced apart in the vertical direction. The third sidewall 213 is connected to the upper ends of the first sidewall 211 and the second sidewall 212 respectively, and the fourth sidewall 214 is connected to the lower ends of the first sidewall 211 and the second sidewall 212 respectively. The third sidewall 213 and the fourth sidewall 214 are arranged in parallel.

[0039] The first energy-absorbing box 21 also includes a third sidewall 213 and a fourth sidewall 214 spaced apart along the vertical direction. The third sidewall 213 is connected to the upper ends of the first sidewall 211 and the second sidewall 212 respectively, and the fourth sidewall 214 is connected to the lower ends of the first sidewall 211 and the second sidewall 212 respectively. This can improve the structural strength of the first energy-absorbing box 21, thereby improving the energy absorption effect of the first energy-absorbing box 21.

[0040] The third sidewall 213 and the fourth sidewall 214 are arranged in parallel. In this way, the dimensions of the first energy-absorbing box 21 are consistent in the vertical direction, which makes the collapse of the two sides of the first energy-absorbing box 21 more balanced. This reduces the possibility of the first energy-absorbing box 21 bending or deflecting towards the first sidewall 211 or towards the second sidewall 212, resulting in a better energy absorption effect of the first energy-absorbing box 21.

[0041] In some embodiments of the present invention, such as Figure 5 As shown, the first sidewall 211 and the second sidewall 212 are symmetrically arranged along the vertical center plane 21a of the first energy-absorbing box.

[0042] The vertical center surface 21a of the first energy-absorbing box refers to the surface that extends along both the vertical and left-right directions and passes through the structural center of the first energy-absorbing box 21. The first sidewall 211 and the second sidewall 212 are symmetrically arranged along the vertical center surface 21a of the first energy-absorbing box. The length and inclination angle of the first sidewall 211 and the second sidewall 212 are the same, and the first energy-absorbing box 21 is constructed as an axisymmetric structure along the front-back direction. In this way, the structural collapse on both sides of the first energy-absorbing box 21 is more balanced, and the bending or deflection of the first energy-absorbing box 21 towards the first sidewall 211 or towards the second sidewall 212 is reduced, resulting in a better energy absorption effect of the first energy-absorbing box 21.

[0043] In some specific embodiments of the present invention, the outer end of the first energy-absorbing box 21 has a front-to-back dimension of 140 mm, the inner end of the first energy-absorbing box 21 has a front-to-back dimension of 50 mm, the first energy-absorbing box 21 has a left-to-right dimension of 130 mm, and the box body thickness of the first energy-absorbing box 21 is 1.5 mm.

[0044] In some specific embodiments of the present invention, the first energy-absorbing box 21 is a steel component, and the first energy-absorbing box 21 is made of HC340LA grade material.

[0045] In some embodiments of the present invention, such as Figure 2 and Figure 5 As shown, the energy-absorbing box 2 also includes a second energy-absorbing box 22. The second energy-absorbing box 22 is disposed close to the inside of the first energy-absorbing box 21. The second energy-absorbing box 22 has an opening 22b that opens toward the first energy-absorbing box 21. At least a portion of the first energy-absorbing box 21 extends into the second energy-absorbing box 22 through the opening 22b, and the end of the first energy-absorbing box 21 facing the second energy-absorbing box 22 is spaced apart from the second energy-absorbing box 22.

[0046] The energy-absorbing box 2 also includes a second energy-absorbing box 22, which is located closer to the inside of the first energy-absorbing box 21. When the vehicle side pillar energy-absorbing structure 100 is impacted, the first energy-absorbing box 21 on the outside is impacted first, followed by the second energy-absorbing box 22 on the inside.

[0047] The second energy-absorbing box 22 has an opening 22b that opens toward the first energy-absorbing box 21. At least a portion of the first energy-absorbing box 21 extends into the second energy-absorbing box 22 through the opening 22b. This reduces the size of the first energy-absorbing box 21 and the second energy-absorbing box 22 in the left-right direction, effectively utilizes the internal space of the sill assembly 1, and reduces the space occupied by the vehicle side pillar energy-absorbing structure 100 in the left-right direction, which is beneficial to the miniaturization of the vehicle side pillar energy-absorbing structure 100.

[0048] Furthermore, the portion of the first energy-absorbing box 21 extending into the second energy-absorbing box 22 is spaced apart from the second energy-absorbing box 22. In this way, the impact force will not be directly transmitted from the first energy-absorbing box 21 to the second energy-absorbing box 22. This allows the first energy-absorbing box 21 and the second energy-absorbing box 22 to collapse and absorb energy sequentially. The energy-absorbing box 2 has a better energy absorption effect, which can slow down the intrusion speed and improve the ability of the vehicle side pillar energy-absorbing structure 100 to resist side collisions.

[0049] In some embodiments of the present invention, such as Figure 4 and Figure 6 As shown, the second energy-absorbing box 22 includes a fifth sidewall 221 and a sixth sidewall 222 spaced apart along the vertical direction, and the fifth sidewall 221 and the sixth sidewall 222 are arranged in parallel. Figure 6 and Figure 7 As shown, the second energy-absorbing box 22 also includes a seventh sidewall 223 and an eighth sidewall 224 spaced apart along the front-back direction. The upper and lower ends of the seventh sidewall 223 are respectively connected to the fifth sidewall 221 and the sixth sidewall 222. The upper and lower ends of the seventh sidewall 223 are respectively connected to the fifth sidewall 221 and the sixth sidewall 222. The upper and lower ends of the eighth sidewall 224 are respectively connected to the fifth sidewall 221 and the sixth sidewall 222. The seventh sidewall 223 includes a plurality of first sub-walls 2231 that are connected in sequence and intersect. The eighth sidewall 224 includes a plurality of second sub-walls 2241 that are connected in sequence and intersect.

[0050] The fifth sidewall 221 and the sixth sidewall 222 are arranged in parallel. In this way, the dimensions of the second energy-absorbing box 22 are consistent in the vertical direction, which makes the collapse of the two sides of the second energy-absorbing box 22 more balanced. This reduces the possibility of the second energy-absorbing box 22 bending or deflecting towards the seventh sidewall 223 or the eighth sidewall 224, resulting in a better energy absorption effect of the second energy-absorbing box 22.

[0051] The seventh sidewall 223 includes a plurality of sequentially connected and intersecting first subwalls 2231, and the eighth sidewall 224 includes a plurality of sequentially connected and intersecting second subwalls 2241. The second energy-absorbing box 22 includes at least six sidewalls, which can increase the structural complexity of the second energy-absorbing box 22, which is beneficial to improving the structural stability of the second energy-absorbing box 22 and can improve the energy absorption capacity of the second energy-absorbing box 22.

[0052] Optionally, the dimensions of the second energy-absorbing box 22 gradually decrease from the outside to the inside in the front-back direction. In this way, when the second energy-absorbing box 22 is subjected to an impact force from the outside to the inside, the second energy-absorbing box 22 is more likely to collapse from the outside to the inside, thereby achieving collapse energy absorption.

[0053] Alternatively, the second energy-absorbing box 22 may have the same dimensions in the front-to-back direction, resulting in a simple structure. This structural reliability enhances the energy absorption capacity of the second energy-absorbing box 22.

[0054] In some embodiments of the present invention, such as Figure 6 and Figure 7 As shown, the seventh sidewall 223 includes three first sub-walls 2231, and the eighth sidewall 224 includes three second sub-walls 2241. Thus, the cross-sectional shape of the second energy-absorbing box 22 in the front-back direction is octagonal.

[0055] It is worth noting that when the number of the first sub-wall 2231 and the second sub-wall 2241 is too small, the structural strength of the second energy-absorbing box 22 is low, which is not conducive to the energy absorption and protection of the second energy-absorbing box 22; while when the number of the first sub-wall 2231 and the second sub-wall 2241 is too large, it will increase the manufacturing difficulty of the second energy-absorbing box 22.

[0056] Therefore, in the second energy-absorbing box 22 of the present invention, the seventh sidewall 223 includes three first sub-walls 2231, and the eighth sidewall 224 includes three second sub-walls 2241. In this way, the cross-sectional shape of the second energy-absorbing box 22 in the front-back direction is octagonal, which not only helps to improve the structural stability of the second energy-absorbing box 22 and improve the energy absorption capacity of the second energy-absorbing box 22, but also reduces the manufacturing difficulty of the second energy-absorbing box 22.

[0057] In some embodiments of the present invention, such as Figure 6 and Figure 7 As shown, the included angle between two adjacent first sub-walls 2231 is the same, and the included angle between two adjacent second sub-walls 2241 is the same.

[0058] In this way, the seventh sidewall 223 and the eighth sidewall 224 are symmetrical structures, which makes the collapse of the second energy-absorbing box 22 more balanced, improves the situation of the second energy-absorbing box 22 bending or deflecting, and makes the energy absorption effect of the second energy-absorbing box 22 better, which can improve the ability of the vehicle side pillar energy-absorbing structure 100 to resist side collisions.

[0059] In some embodiments of the present invention, such as Figure 6 and Figure 7As shown, the fifth sidewall 221 and the sixth sidewall 222 extend in the horizontal direction, the seventh sidewall 223 includes three first sub-walls 2231, the first sub-wall 2231 located in the middle position of the three first sub-walls 2231 extends in the vertical direction; the eighth sidewall 224 includes three second sub-walls 2241, the second sub-wall 2241 located in the middle position of the three second sub-walls 2241 extends in the vertical direction.

[0060] In this way, the second energy-absorbing box 22 has stronger structural stability, which can improve the ability of the vehicle side pillar energy-absorbing structure 100 to resist side collisions.

[0061] In some embodiments of the present invention, such as Figure 6 and Figure 7 As shown, the fifth sidewall 221 and the sixth sidewall 222 extend horizontally, the seventh sidewall 223 includes three first sub-walls 2231, the first sub-wall 2231 located in the middle position of the three first sub-walls 2231 extends vertically, and the included angle between two adjacent first sub-walls 2231 is the same; the eighth sidewall 224 includes three second sub-walls 2241, the second sub-wall 2241 located in the middle position of the three second sub-walls 2241 extends vertically, and the included angle between two adjacent second sub-walls 2241 is the same.

[0062] The seventh sidewall 223 has a symmetrical structure, the eighth sidewall 224 has a symmetrical structure, and the second energy-absorbing box 22 has strong structural stability, which makes the collapse of the second energy-absorbing box 22 more balanced, improves the situation of the second energy-absorbing box 22 bending or deflecting, and the energy absorption effect of the second energy-absorbing box 22 is better, which can improve the ability of the vehicle side pillar energy-absorbing structure 100 to resist side collisions.

[0063] In some embodiments of the present invention, such as Figure 7 As shown, the seventh sidewall 223 and the eighth sidewall 224 are symmetrically arranged along the vertical center plane 22a of the second energy-absorbing box.

[0064] The vertical center surface 22a of the second energy-absorbing box refers to the surface that extends vertically and horizontally and passes through the structural center of the second energy-absorbing box 22. The seventh sidewall 223 and the eighth sidewall 224 are symmetrically arranged along the vertical center surface 22a of the second energy-absorbing box. The number and inclination angle of the first sub-wall 2231 are the same as those of the second sub-wall 2241. The second energy-absorbing box 22 is constructed as an axisymmetric structure along the front-to-back direction. This allows for more balanced structural collapse on both sides of the second energy-absorbing box 22, reducing the likelihood of bending or deflection of the second energy-absorbing box 22 towards the seventh sidewall 223 or the eighth sidewall 224, resulting in better energy absorption.

[0065] In some embodiments of the present invention, such as Figure 7As shown, the second energy-absorbing box 22 has a front-to-back dimension of L1 and a vertical dimension of L2. L1 and L2 satisfy: 0.9≤L2 / L1≤1.3.

[0066] The second energy-absorbing box 22 has a smaller size in the front-to-back direction, thus occupying less space inside the sill assembly 1. Furthermore, the size of the second energy-absorbing box 22 in the front-to-back direction is similar to that in the vertical direction. The second energy-absorbing box 22 has a regular polygonal cross-section, which tends to produce symmetrical and orderly collapse when subjected to axial compression by impact, resulting in better energy absorption efficiency and improved energy absorption effect.

[0067] Optionally, the ratio of the dimension L1 of the second energy-absorbing box 22 in the front-to-back direction to the dimension L2 of the second energy-absorbing box 22 in the vertical direction can be 1.0, 1.05, 1.1, 1.15, 1.2, etc.

[0068] In some specific embodiments of the present invention, such as Figure 7 As shown, the fifth sidewall 221 and the sixth sidewall 222 extend horizontally. The seventh sidewall 223 includes three first sub-walls 2231, with the middle sub-wall 2231 extending vertically and the angle between adjacent first sub-walls 2231 being the same. The eighth sidewall 224 includes three second sub-walls 2241, with the middle sub-wall 2241 extending vertically and the angle between adjacent second sub-walls 2241 being the same. The second energy-absorbing box 22 has a front-to-back dimension L1 equal to its vertical dimension L2, and its cross-sectional shape in the front-to-back direction is a regular octagon.

[0069] The second energy-absorbing box 22 has a regular octagonal cross-sectional shape in the front-to-back direction. When it is subjected to impact and axial compression, it tends to produce symmetrical and orderly collapse, resulting in better energy absorption efficiency and improving the energy absorption effect of the second energy-absorbing box 22.

[0070] In some specific embodiments of the present invention, the second energy-absorbing box 22 has a front-to-back dimension of 150 mm, a vertical dimension of 100 mm, a horizontal dimension of 80 mm, and a box body thickness of 2 mm.

[0071] In some specific embodiments of the present invention, the second energy-absorbing box 22 is a steel component, and the second energy-absorbing box 22 is made of HC42 / 780DP grade material.

[0072] In some embodiments of the present invention, the vertical center surface 21a of the first energy-absorbing box and the vertical center surface 22a of the second energy-absorbing box are located on the same plane.

[0073] This reduces the dimensions of the first energy-absorbing box 21 and the second energy-absorbing box 22 in the front-to-back direction, effectively utilizing the internal space of the sill assembly 1.

[0074] In some embodiments of the present invention, such as Figure 2 As shown, the sill assembly 1 includes: an outer sill plate 11 and an inner sill plate 12, which together define a first space; a first energy-absorbing box 21 is fixedly connected to the outer sill plate 11, and a second energy-absorbing box 22 is fixedly connected to the inner sill plate 12.

[0075] By using the outer sill plate 11 and the inner sill plate 12 to define the first space, the manufacturing difficulty can be reduced and the manufacturing efficiency of the sill assembly 1 can be improved.

[0076] In some embodiments of the present invention, the upper edge of the outer sill plate 11 is welded to the upper edge of the inner sill plate 12, and the lower edge of the outer sill plate 11 is welded to the lower edge of the inner sill plate 12.

[0077] The first energy-absorbing box 21 is fixedly connected to the outer sill plate 11, and the second energy-absorbing box 22 is fixedly connected to the inner sill plate 12. In this way, the first energy-absorbing box 21 and the outer sill plate 11 can be fixedly connected as one unit, and the second energy-absorbing box 22 and the inner sill plate 12 can be fixedly connected as one unit. Then, the first energy-absorbing box 21 and the second energy-absorbing box 22 can be nested together, thereby reducing manufacturing difficulty and improving assembly efficiency.

[0078] In some embodiments of the present invention, such as Figure 3 As shown, the first energy-absorbing box 21 is welded and fixed to the outer sill plate 11 via the welding edge 215 of the first energy-absorbing box. Figure 6 As shown, the second energy-absorbing box 22 is welded and fixed to the inner sill plate 12 via the second energy-absorbing box welding edge 225. The second energy-absorbing box welding edge 22 is connected to the inner ends of the fifth side wall 221, the sixth side wall 222, the seventh side wall 223 and the eighth side wall 224.

[0079] In some embodiments of the present invention, the height center line of the first energy-absorbing box 21 coincides with the height center line of the outer sill plate 11, and the height center line of the second energy-absorbing box 22 coincides with the height center line of the inner sill plate 12.

[0080] The first energy-absorbing box 21 is fixedly connected to the outer sill plate 11, and the second energy-absorbing box 22 is fixedly connected to the inner sill plate 12. The fixed connection of the outer sill plate 11 and the inner sill plate 12 naturally completes the cooperation between the first energy-absorbing box 21 and the second energy-absorbing box 22. Therefore, by designing the height centerline of the first energy-absorbing box 21 to coincide with the height centerline of the outer sill plate 11, and designing the height centerline of the second energy-absorbing box 22 to coincide with the height centerline of the inner sill plate 12, interference caused by assembly errors between the first energy-absorbing box 21 and the second energy-absorbing box 22 can be reduced, thereby improving the operational reliability of the energy-absorbing box 2.

[0081] In some embodiments of the present invention, the structural strength of the second energy-absorbing box 22 is greater than that of the first energy-absorbing box 21.

[0082] In this way, the structural strength of the second energy-absorbing box 22 and the first energy-absorbing box 21 is gradually increased from the outside to the inside, so as to achieve the effect of energy gradient absorption.

[0083] When a vehicle experiences a side pole impact, the first point of contact is the outer door sill plate 11, which pushes the outer door sill plate 11 and the first energy-absorbing box 21 into axial compression. Throughout the entire transmission path, the first energy-absorbing box 21 has the smallest cavity, the thinnest material, and the lowest material grade. The first energy-absorbing box 21 is the first to undergo axial crushing and gradually advances inward. As the test rigid column continues to move inward, the second point of contact becomes the second energy-absorbing box 22. The material thickness of the second energy-absorbing box 22 is greater than that of the first energy-absorbing box 21, enabling it to undergo axial crushing and absorb energy. The first energy-absorbing box 21 and the second energy-absorbing box 22 gradually crush from the outside in, achieving an energy gradient absorption effect while controlling the intrusion speed.

[0084] In some embodiments of the present invention, the first energy-absorbing box 21 is made of HC340LA grade material, and the second energy-absorbing box 22 is made of HC42 / 780DP grade material.

[0085] Of course, this is not the only option. Depending on the weight of the vehicle, the materials and thicknesses of the parts involved can be adjusted while maintaining the gradual reinforcement from the outside to the inside. The function of this structure can still be achieved by simultaneously increasing or decreasing the material thickness of the first energy-absorbing box 21 and the second energy-absorbing box 22. For example, the first energy-absorbing box 21 uses HC340LA-1.2mm material, while the second energy-absorbing box 22 uses HC420LA-1.5mm material.

[0086] According to a second aspect of the present invention, an automobile includes: a side pillar energy-absorbing structure 100 and a crossbeam 200, wherein the side pillar energy-absorbing structure 100 is the same as the side pillar energy-absorbing structure 100 of the first aspect of the present invention; the crossbeam 200 extends in the left-right direction and is fixedly connected to the door sill assembly 1, and the energy-absorbing box 2 and the crossbeam 200 are arranged facing each other in the left-right direction.

[0087] A force transmission relationship exists between the vehicle body side pillar energy-absorbing structure 100 and the crossbeam 200. When a side pillar impact occurs, the impact force is transmitted from the vehicle body side pillar energy-absorbing structure 100 to the crossbeam 200. The crossbeam 200 has high structural strength and basically does not deform, maintaining the stability of the passenger compartment. The crossbeam 200 and the vehicle body side pillar energy-absorbing structure 100 work together to resist side impacts.

[0088] According to an embodiment of the present invention, by providing the above-mentioned side pillar energy-absorbing structure 100, the vehicle's ability to resist side collisions can be improved.

[0089] In some specific embodiments of the present invention, the crossbeam 200 is a steel component, and the crossbeam 200 is made of 2Gpa steel, which has high hardness.

[0090] In this way, the structural strength of the second energy-absorbing box 22, the first energy-absorbing box 21, and the crossbeam 200 is gradually increased from the outside to the inside, so as to achieve the effect of energy gradient absorption.

[0091] In some embodiments of the present invention, the vehicle includes a front seat crossbeam 200, which is configured as described above and is positioned directly opposite the energy-absorbing box 2 in the left-right direction. In this way, by providing the aforementioned vehicle side pillar energy-absorbing structure 100, the protection effect for the front-seat occupants can be improved.

[0092] In other embodiments of the present invention, the automobile includes a front seat crossbeam 200 and a rear seat crossbeam 200, with the crossbeam 200 located between the front seat crossbeam 200 and the rear seat crossbeam 200. By providing the above-mentioned vehicle side pillar energy-absorbing structure 100, the protection of the electric vehicle battery can be improved.

[0093] In some specific embodiments of the present invention, the vehicle side pillar energy-absorbing structure 100 includes a first energy-absorbing box 21 and a second energy-absorbing box 22. The crossbeam 200 extends in the left-right direction and is fixedly connected to the door sill assembly 1. The energy-absorbing box 2 and the crossbeam 200 are arranged opposite each other in the left-right direction. The crossbeam 200 is made of 2Gpa steel.

[0094] The outer end of the first energy-absorbing box 21 has a front-to-back dimension of 140mm, the inner end of the first energy-absorbing box 21 has a front-to-back dimension of 50mm, the first energy-absorbing box 21 has a left-to-right dimension of 130mm, the box body thickness of the first energy-absorbing box 21 is 1.5mm, and the first energy-absorbing box 21 is made of HC340LA grade material.

[0095] The second energy-absorbing box 22 has a regular octagonal cross-sectional shape in the front-to-back direction, a front-to-back dimension of 150mm, a vertical dimension of 100mm, a horizontal dimension of 80mm, a box thickness of 2mm, and is made of HC42 / 780DP grade material.

[0096] When the vehicle undergoes a side pole impact test, the impact pole 300 applies a force to the outer door sill plate 11, causing the first energy-absorbing box 21 to first undergo crushing deformation. After the impact pole 300 moves 60mm, it enters the range of the second energy-absorbing box 22, and the second energy-absorbing box 22 begins to undergo axial crushing deformation. When the impact pole 300 continues to move inward to 140mm, the first energy-absorbing box 21 and the second energy-absorbing box 22 are completely crushed and deformed. The energy brought by the impact pole 300 is transferred to the crossbeam 200. With the support of the crossbeam 200, the car consumes all the energy of the side pole impact.

[0097] Other components of the vehicle side pillar energy-absorbing structure 100 according to embodiments of the present invention, such as the sill assembly 1, and its operation are known to those skilled in the art and will not be described in detail here.

[0098] In the description of this invention, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and "axial" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0099] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0100] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0101] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0102] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0103] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vehicle body side pillar energy-absorbing structure, characterized in that, include: A door sill assembly, the length of which extends in the front-rear direction, and a first space is formed inside the door sill assembly; An energy-absorbing box is fixedly connected to the sill assembly and disposed within the first space. The energy-absorbing box is a hollow box-shaped structure. There is at least one energy-absorbing box, and the dimensions of the at least one energy-absorbing box gradually decrease from the outside to the inside in the front-back direction.

2. The vehicle body side pillar energy-absorbing structure according to claim 1, characterized in that, The energy-absorbing box includes a first energy-absorbing box, which includes a first sidewall and a second sidewall spaced apart in the front-back direction, and the first sidewall and the second sidewall gradually extend from the outside to the inside toward each other.

3. The vehicle body side pillar energy-absorbing structure according to claim 2, characterized in that, The first energy-absorbing box includes a third sidewall and a fourth sidewall spaced apart in the vertical direction. The third sidewall is connected to the upper ends of the first sidewall and the second sidewall, respectively, and the fourth sidewall is connected to the lower ends of the first sidewall and the second sidewall, respectively. The third sidewall and the fourth sidewall are arranged in parallel. The first sidewall and the second sidewall are symmetrically arranged along the vertical center plane of the first energy-absorbing box.

4. The vehicle body side pillar energy-absorbing structure according to any one of claims 2-3, characterized in that, The energy-absorbing box further includes a second energy-absorbing box, which is disposed close to the inside of the first energy-absorbing box. The second energy-absorbing box has an opening that opens toward the first energy-absorbing box. At least a portion of the first energy-absorbing box extends into the second energy-absorbing box through the opening, and the end of the first energy-absorbing box facing the second energy-absorbing box is spaced apart from the second energy-absorbing box.

5. The vehicle body side pillar energy-absorbing structure according to claim 4, characterized in that, The second energy-absorbing box includes a fifth sidewall and a sixth sidewall spaced apart in the vertical direction, and the fifth sidewall and the sixth sidewall are arranged in parallel. The second energy-absorbing box also includes a seventh sidewall and an eighth sidewall spaced apart along the front-back direction. The upper and lower ends of the seventh sidewall are respectively connected to the fifth sidewall and the sixth sidewall. The upper and lower ends of the eighth sidewall are respectively connected to the fifth sidewall and the sixth sidewall. The seventh sidewall includes a plurality of sequentially connected and intersecting first sub-walls. The eighth sidewall includes a plurality of sequentially connected and intersecting second sub-walls. The dimensions of the second energy-absorbing box gradually decrease from the outside to the inside in the front-to-back direction, or the dimensions of the second energy-absorbing box are the same in the front-to-back direction.

6. The vehicle body side pillar energy-absorbing structure according to claim 5, characterized in that, The seventh sidewall includes three first subwalls, and the eighth sidewall includes three second subwalls; The included angle between two adjacent first sub-walls is the same, and the included angle between two adjacent second sub-walls is the same. And / or, the fifth sidewall and the sixth sidewall extend horizontally, the first sub-wall located in the middle extends vertically, and the second sub-wall located in the middle extends vertically.

7. The vehicle body side pillar energy-absorbing structure according to claim 6, characterized in that, The seventh sidewall and the eighth sidewall are symmetrically arranged along the vertical center plane of the second energy-absorbing box; And / or, the second energy-absorbing box has a front-to-back dimension of L1 and a vertical dimension of L2, where L1 and L2 satisfy: 0.9 ≤ L2 / L1 ≤ 1.

3.

8. The vehicle body side pillar energy-absorbing structure according to claim 7, characterized in that, The vertical center plane of the first energy-absorbing box and the vertical center plane of the second energy-absorbing box are located on the same plane.

9. The vehicle body side pillar energy-absorbing structure according to claim 5, characterized in that, The sill assembly includes an outer sill plate and an inner sill plate, the outer sill plate and the inner sill plate together defining the first space; The first energy-absorbing box is fixedly connected to the outer sill plate, and the second energy-absorbing box is fixedly connected to the inner sill plate.

10. The vehicle body side pillar energy-absorbing structure according to claim 9, characterized in that, The height centerline of the first energy-absorbing box coincides with the height centerline of the outer sill plate, and the height centerline of the second energy-absorbing box coincides with the height centerline of the inner sill plate.

11. The vehicle body side pillar energy-absorbing structure according to claim 5, characterized in that, The structural strength of the second energy-absorbing box is greater than that of the first energy-absorbing box.

12. A car, characterized in that, include: A vehicle side pillar energy-absorbing structure, wherein the vehicle side pillar energy-absorbing structure is the vehicle side pillar energy-absorbing structure according to any one of claims 1-11; A crossbeam extends in the left-right direction and is fixedly connected to the sill assembly. The energy-absorbing box is positioned opposite the crossbeam in the left-right direction.

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