VAN vehicle side impact energy absorption structure and VAN vehicle

Abstract

The invention discloses a VAN vehicle side impact energy absorption structure and a VAN vehicle, and belongs to the technical field of automobile bodies, the VAN vehicle side impact energy absorption structure comprises a box-shaped energy absorption structure composed of a leg twisting supporting plate, a front leg twisting reinforcing plate, a rear leg twisting reinforcing plate and leg twisting sealing plates, the leg twisting supporting plate comprises a leg twisting bottom plate and leg twisting side plates, and the leg twisting sealing plates are welded to the upper side edges of the two leg twisting side plates; a front leg twisting reinforcing plate and a rear leg twisting reinforcing plate are welded between the front and rear sides of the leg twisting bottom plate and the leg twisting side plates, and the front and rear sides of the left and right leg twisting side plates are welded to the side faces of the front longitudinal beam inner plate and the front doorsill inner plate respectively. The box-shaped energy absorption structure has the beneficial effects that the box-shaped energy absorption structure is composed of the leg twisting supporting plate, the front leg twisting reinforcing plate, the rear leg twisting reinforcing plate and the leg twisting sealing plate, the rigidity of the leg twisting supporting plate is improved through the leg twisting reinforcing plate, and a leg twisting supporting box formed by the leg twisting supporting plate and the leg twisting sealing plate is connected between the front doorsill assembly and the front longitudinal beam assembly; the energy can be greatly absorbed; and the side collision invasion amount and the invasion speed are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile bodies, and in particular to a VAN vehicle side impact energy absorption structure and a VAN vehicle. Background Art

[0002] With the rapid development of the times, the market demand for load-bearing light buses - VAN vehicles is growing, and VAN vehicles have become one of the key vehicle types that various automobile manufacturers are competing to develop. In the era of rapid development of new energy vehicles, electrical safety is a topic of common concern to designers and users. As a vehicle that combines passenger and commercial functions, the side impact safety of VAN vehicles is undoubtedly a topic that designers focus on.

[0003] like Figure 1 The figure shows a schematic diagram of a vehicle body side impact energy absorption structure of the prior art, wherein the vehicle body frame includes a front floor 2, a front longitudinal beam inner plate 3, a front longitudinal beam outer plate 4, a front sill inner plate 5 and a front sill outer plate 6, one side of the front floor 2 is welded to the side of the front sill inner plate 5, one side of the front longitudinal beam inner plate 3 and the front longitudinal beam outer plate 4 are stacked up and down to form a "F" shape, and the other side is welded to the surface of the front floor 2, and the front sill outer plate 6 is welded to the side of the front longitudinal beam inner plate 3 away from the front floor 2; Figure 2 As shown, the twist leg support plate 1 includes a twist foot top plate 11, and the left and right sides of the twist foot top plate 11 extend downward to form a twist foot side plate 12, and the front and rear sides of the twist foot top plate 11 are bent in the same direction to form a front folding edge 111 and a rear folding edge 112, and the lower surface of the front folding edge 111 is welded to the front longitudinal beam inner plate 3 and the front longitudinal beam outer plate 4 through three layers of welding points, and the lower surface of the rear folding edge 112 is welded to the upper surface of the front sill inner plate 5; the lower side of the twist foot side plate 12 is bent outward to form a side panel lower folding edge 121, and the side panel lower folding edge 121 is welded to the front floor 2, and the front and rear sides of the twist foot side plate 12 are bent inward to form a side panel folding edge 122, and the side panel folding edges 122 located at the front and rear are respectively welded to the side surfaces of the front longitudinal beam inner plate 3 and the front sill inner plate 5, so that the front sill, the front longitudinal beam, and the front floor can be supported on three sides by the twist leg support plate 1 for structural reinforcement and side collision safety. However, the above-mentioned vehicle body side impact energy absorption structure has the following problems: (1) The torsion leg support plate lacks internal support and has relatively weak rigidity; (2) The bottom surface of the torsion leg support plate is a planar structure and is in an open state, with relatively weak rigidity and energy absorption; (3) The energy absorption surface of the torsion leg support plate only has the edge lines of three surfaces consisting of the front and rear sides and the bottom, and the energy absorption is limited.

[0004] In view of this, the inventor conducted in-depth research on this demand, and thus the present case was produced. Summary of the invention

[0005] In view of the problems in the prior art that the side impact energy absorption structure of the VAN vehicle lacks internal support, has weak rigidity and weak energy absorption, the present invention provides a VAN vehicle side impact energy absorption structure, which adopts a closed box-shaped energy absorption structure to improve its own support rigidity and increase the force bearing area, and can fully absorb the collision energy during the side collision process, thereby ensuring the collision safety of the vehicle. The specific technical solution is as follows:

[0006] A VAN vehicle side impact energy absorption structure, used for welding with a vehicle body frame, wherein the vehicle body frame comprises a front floor, a front longitudinal beam inner plate, a front longitudinal beam outer plate, a front sill inner plate and a front sill outer plate, one side of the front floor is welded to the side of the front sill inner plate, the front longitudinal beam inner plate and one side of the front longitudinal beam outer plate are stacked up and down to form a "J" shape, and the other side is welded to the surface of the front floor, and the front sill outer plate is welded to the side of the front longitudinal beam inner plate away from the front floor;

[0007] The vehicle side impact energy absorption structure comprises a box-shaped energy absorption structure composed of a twist leg support plate, a front twist leg reinforcement plate, a rear twist leg reinforcement plate and a twist leg sealing plate, wherein the twist leg support plate comprises a twist leg bottom plate and twist leg side plates formed by extending upward from the left and right sides of the twist leg bottom plate, a front twist leg reinforcement plate and a rear twist leg reinforcement plate are welded between the front and rear sides of the twist leg bottom plate and the twist leg side plates, and twist leg sealing plates are welded on the upper sides of the two twist leg side plates;

[0008] The front sides of the torsion leg side panels on the left and right sides are welded to the side faces of the inner panels of the front longitudinal beam, and the front sides of the torsion leg sealing plates are welded to the inner panels and outer panels of the front longitudinal beam through three layers of welding points; the rear sides of the torsion leg side panels on the left and right sides are welded to the side faces of the inner panels of the front sills, and the rear sides of the torsion leg sealing plates are welded to the upper surface of the inner panels of the front sills; the torsion leg bottom plate is welded to the front floor.

[0009] The box-shaped energy absorbing structure consists of a torsion leg support plate, a front torsion leg reinforcement plate, a rear torsion leg reinforcement plate and a torsion leg sealing plate, wherein the torsion leg reinforcement plate increases the rigidity of the torsion leg support plate, and the torsion leg support box formed by the torsion leg support plate and the torsion leg sealing plate is connected between the front door sill assembly and the front longitudinal beam assembly, which can greatly absorb energy and reduce the side collision intrusion amount and intrusion speed.

[0010] Preferably, the left and right sides of the torsion leg sealing plate extend upward to form arched reinforcing edges, the front and rear sides of the torsion leg sealing plate are bent in the same direction to form front and rear folded edges, the outer side surfaces of the arched reinforcing edges are welded to the torsion leg side plates, the lower surface of the front folded edge is welded to the front longitudinal beam inner plate and the front longitudinal beam outer plate through three layers of welding points, and the lower surface of the rear folded edge is welded to the upper surface of the front door sill inner plate.

[0011] Preferably, the overall shape of the twist leg side plate is a right-angled trapezoid, and the outer side surface of the arched reinforcement edge is welded to the oblique side surface close to the twist leg side plate, and 6 welding points are welded between the arched reinforcement edge and the twist leg side plate on the left and right sides along the oblique direction of the twist leg side plate;

[0012] The lower surface of the front folded edge is welded to the front longitudinal beam inner plate and the front longitudinal beam outer plate through three three-layer welding points; the lower surface of the rear folded edge is welded to the upper surface of the front door sill inner plate through three welding points distributed in the left and right directions.

[0013] Preferably, the front and rear sides of the twist leg side panel on the left side extend to the left to form a side panel folded edge, the front and rear sides of the twist leg side panel on the right side extend to the right to form a side panel folded edge, the side panel folded edge on the front side is welded to the side surface of the inner panel of the front longitudinal beam, and the side panel folded edge on the rear side is welded to the side surface of the inner panel of the front door sill.

[0014] Preferably, the two side panel folds located at the front side are respectively welded to the side surface of the inner panel of the front longitudinal beam through two welding points arranged upper and lower;

[0015] An avoidance gap is formed on the side panel folded edge located on the rear side, and the side panel folded edge with the avoidance gap is welded to the side surface of the inner panel of the front door sill through four welding points arranged upper and lower; the side panel folded edge without the avoidance gap is welded to the side surface of the inner panel of the front door sill through six welding points arranged upper and lower.

[0016] Preferably, the front torsion leg reinforcement plate comprises a front reinforcement main body plate, front reinforcement folding edges located at both side edges of the front reinforcement main body plate, and a front lower reinforcement folding edge located at the lower side edge of the front reinforcement main body plate, the front reinforcement folding edge is welded to the torsion leg side plate, and the front lower reinforcement folding edge is welded to the torsion leg bottom plate;

[0017] The rear torsion leg reinforcement plate includes a rear reinforcement main body plate, rear reinforcement folded edges located at both side edges of the rear reinforcement main body plate, and a rear lower reinforcement folded edge located at the lower side edge of the rear reinforcement main body plate. The rear reinforcement folded edges are welded to the torsion leg side plates, and the rear lower reinforcement folded edges are welded to the torsion leg bottom plate.

[0018] Preferably, the two front reinforcing folding edges of the front twist leg reinforcing plate are respectively welded to the twist leg side plate through two welding points; the front lower reinforcing folding edge of the front twist leg reinforcing plate is welded to the twist leg bottom plate through two welding points;

[0019] The two rear reinforcing folded edges of the rear twist leg reinforcement plate are respectively welded to the twist leg side plate through three welding points; the rear lower reinforcing folded edge of the rear twist leg reinforcement plate is welded to the twist leg bottom plate through two welding points.

[0020] Preferably, the twist leg base plate is welded to the front floor via 6 welding points.

[0021] Preferably, a refueling pipe through hole is formed on the twist leg bottom plate and the twist leg sealing plate.

[0022] The present invention also provides a VAN vehicle, which adopts the above-mentioned side impact energy absorption structure and can be used at the left and right front doors of the VAN vehicle.

[0023] The beneficial effects produced by the technical solution of the present invention are as follows:

[0024] (1) The twist leg support plate and the twist leg reinforcement plate are welded together to form an open box-shaped basic frame, and the twist leg reinforcement plate increases the rigidity of the twist leg support plate;

[0025] (2) The bottom of the twist leg support plate is welded to the front floor, and the upper part is welded to the twist leg sealing plate, thus forming a complete box-shaped energy absorption structure. In addition, since the twist leg support plate and the twist leg sealing plate are welded on the side surface with a flat surface, the twist leg sealing plate is an arched sealing plate, which can well improve the support stiffness and increase the absorption of collision energy.

[0026] (3) The twist leg support box formed by the twist leg support plate and the twist leg sealing plate is connected between the front door sill assembly and the front longitudinal beam assembly, which can greatly absorb energy and reduce the side collision intrusion amount and intrusion speed. In the side collision simulation analysis, the twist leg support box fully absorbs the collision energy, does not cause collision deformation to the front longitudinal beam assembly, and can protect the battery pack; the intrusion amount of the B-pillar is reduced from the original 109mm to 87mm, and the intrusion speed is reduced from the original 7.3m / s to 5.9m / s, which improves the collision safety; the intrusion amount of the front door is reduced from the original 135mm to 107mm, and the intrusion speed is reduced from the original 7.9m / s to 6.6m / s, protecting the safety of the occupants. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the vehicle body side impact energy absorption structure in the prior art;

[0029] Figure 2 It is a schematic diagram of the three-dimensional structure of a twisted leg support plate in the prior art;

[0030] Figure 3 It is a schematic diagram of the vehicle body side impact energy absorption structure in the present invention;

[0031] Figure 4 It is a schematic diagram of the box-shaped energy absorption structure in the present invention;

[0032] Figure 5 It is a schematic diagram of the three-dimensional structure of the twisted leg support plate in the present invention;

[0033] Figure 6 It is a three-dimensional exploded view of the box-shaped energy absorbing structure of the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but only represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. It should be noted that the description of the position relationship of the energy-absorbing structure by "upper", "lower", "left", "right", "front" and "rear" appearing in this embodiment is limited to its relative position relationship, in order to facilitate the description of its structure, and does not have a limiting effect on its orientation when used. For example, when the "upper surface" is applied to a VAN car, it may be on the lower surface of the corresponding component, and the left or right side may correspond to the front or rear side, which does not constitute a limitation on the scope of protection of the present invention.

[0035] like Figure 3-6 The VAN vehicle side impact energy absorption structure shown is used for welding with the vehicle body frame. The VAN vehicle side impact energy absorption structure can be set on both sides of the vehicle body and is set symmetrically on the left and right sides. Here, the energy absorption structure on one side of the vehicle body is introduced, wherein the vehicle body frame includes a front floor 2, a front longitudinal beam inner plate 3, a front longitudinal beam outer plate 4, a front door sill inner plate 5 and a front door sill outer plate 6. One side of the front floor 2 is welded to the side of the front door sill inner plate 5, one side of the front longitudinal beam inner plate 3 and the front longitudinal beam outer plate 4 are stacked up and down to form a "J" shape, and the other side is welded to the surface of the front floor 2, and the front door sill outer plate 6 is welded to the side of the front longitudinal beam inner plate 5 away from the front floor 2;

[0036] The front door sill inner panel 5 and the front door sill outer panel 6 are connected by a row of welding points to form a front door sill assembly, and then the front door sill inner panel 5 is welded to the front floor 2 through a row of welding points. The two rows of welding points weld the front longitudinal beam inner panel 3, the front longitudinal beam outer panel 4 and the front floor 2 to achieve the connection between the left front longitudinal beam assembly and the front floor 2; it is believed that the spacing between two welding points in each row is about 40 mm, and the arrangement directions of each row of welding points are parallel to each other.

[0037] The VAN vehicle side impact energy absorption structure includes a box-shaped energy absorption structure composed of a twist leg support plate 1, a front twist leg reinforcement plate 7, a rear twist leg reinforcement plate 8 and a twist leg sealing plate 9, wherein the twist leg support plate 1 includes a twist leg bottom plate 13 and a twist leg side plate 12 formed by extending upwards from the left and right sides of the twist leg bottom plate 13, a front twist leg reinforcement plate 7 and a rear twist leg reinforcement plate 8 are welded between the front and rear sides of the twist leg bottom plate 13 and the twist leg side plate 12, and a twist leg sealing plate 9 is welded on the upper sides of the two twist leg side plates 12;

[0038] The front sides of the torsion leg side panels 12 on the left and right sides are welded to the side faces of the front longitudinal beam inner panel 3, and the front sides of the torsion leg sealing panels 9 are welded to the front longitudinal beam inner panel 3 and the front longitudinal beam outer panel 4 through three layers of welding points; the rear sides of the torsion leg side panels 12 on the left and right sides are welded to the side faces of the front sill inner panel 5, and the rear sides of the torsion leg sealing panels 9 are welded to the upper surface of the front sill inner panel 5; the torsion leg bottom panel 13 is welded to the front floor 2, which can greatly improve the supporting stiffness, thus forming a relatively closed torsion leg supporting box structure.

[0039] The left and right sides of the twist leg sealing plate 9 extend upward to form an arched reinforcement edge 91. The twist leg sealing plate with a three-dimensional structure is used here to avoid plane support. Its cavity support can better absorb energy and reduce the side impact intrusion amount and intrusion speed. The front and rear sides of the twist leg sealing plate 9 are bent in the same direction to form a front folding edge 111 and a rear folding edge 112. The outer side of the arched reinforcement edge 91 is welded to the twist leg side plate 12. The lower surface of the front folding edge 111 is welded to the front longitudinal beam inner plate 3 and the front longitudinal beam outer plate 4 through three layers of welding points. The lower surface of the rear folding edge 112 is welded to the upper surface of the front door sill inner plate 5.

[0040] The overall shape of the twist leg side plate 12 is a right-angled trapezoid, and the outer side surface of the arched reinforcement edge 91 is welded to the oblique side surface close to the twist leg side plate 12, and 6 welding points are welded between the arched reinforcement edge 91 and the twist leg side plate 12 on the left and right sides along the oblique direction of the twist leg side plate 12;

[0041] The lower surface of the front folding edge 111 is welded to the front longitudinal beam inner plate 3 and the front longitudinal beam outer plate 4 through three three-layer welding points; the lower surface of the rear folding edge 112 is welded to the upper surface of the front door sill inner plate 5 through three welding points distributed in the left and right directions.

[0042] The front and rear sides of the twist leg side panel 12 on the left side extend to the left to form a side panel folded edge 122, and the front and rear sides of the twist leg side panel 12 on the right side extend to the right to form a side panel folded edge 122. The side panel folded edge 122 on the front side is welded to the side of the front longitudinal beam inner panel 3, and the side panel folded edge 122 on the rear side is welded to the side of the front door sill inner panel 5.

[0043] The two side panel folding edges 122 located at the front side are respectively welded to the side surface of the front longitudinal beam inner panel 3 through two welding points arranged upper and lower;

[0044] An avoidance notch 123 is formed on one of the side panel folded edges 122 located on the rear side; the side panel folded edge 122 with the avoidance notch 123 is welded to the side of the front door sill inner panel 5 through four welding points arranged upper and lower; the side panel folded edge 122 without the avoidance notch 123 is welded to the side of the front door sill inner panel 5 through six welding points arranged upper and lower.

[0045] The front twist leg reinforcement plate 7 includes a front reinforcement main body plate 71, front reinforcement folding edges 72 located at both sides of the front reinforcement main body plate 71, and a front lower reinforcement folding edge 73 located at the lower side of the front reinforcement main body plate 71, the front reinforcement folding edge 72 is welded to the twist leg side plate 12, and the front lower reinforcement folding edge 72 is welded to the twist leg bottom plate 13;

[0046] The rear torsion leg reinforcement plate 8 includes a rear reinforcement main body plate 81, rear reinforcement folding edges 82 located at both sides of the rear reinforcement main body plate 81, and a rear lower reinforcement folding edge 83 located at the lower side of the rear reinforcement main body plate 81. The rear reinforcement folding edge 82 is welded to the torsion leg side plate 12, and the rear lower reinforcement folding edge 83 is welded to the torsion leg bottom plate 13. Figure 4 and 6 As shown, the torsion leg support plate is welded with the front torsion leg reinforcement plate and the rear torsion leg reinforcement plate to form the basic framework of the open box-shaped energy absorption structure. The front torsion leg reinforcement plate 7 and the rear torsion leg reinforcement plate 8 can form a strong support on the front and rear side elevations of the torsion leg support plate 1, thereby improving the rigidity of the torsion leg support plate 1; the collision energy is absorbed by the front and rear side vertical edges of the original torsion leg support plate 1, and now the energy is absorbed by the surface supported by the front torsion leg reinforcement plate 7 and the rear torsion leg reinforcement plate 8 in addition to the vertical surfaces on both sides of the torsion leg support plate 1, which can more fully absorb energy and improve collision safety.

[0047] As a preferred embodiment, the two front reinforcing folding edges 72 of the front twist leg reinforcing plate 7 are respectively welded to the twist leg side plate 12 through two welding points; the front lower reinforcing folding edge 73 of the front twist leg reinforcing plate 7 is welded to the twist leg bottom plate 13 through two welding points;

[0048] The two rear reinforcing folded edges 82 of the rear twist leg reinforcement plate 8 are respectively welded to the twist leg side plate 12 through three welding points; the rear lower reinforcing folded edge 83 of the rear twist leg reinforcement plate 8 is welded to the twist leg bottom plate 13 through two welding points.

[0049] The twist leg bottom plate 13 is welded to the front floor 2 through 6 welding points, so that the open box-shaped energy absorbing structure is connected to the front floor as a whole. The twist leg bottom plate 13 and the twist leg sealing plate 9 are formed with a refueling pipe through hole 10.

[0050] A torsion leg support box is adopted which is composed of a torsion leg support plate 1, a front torsion leg reinforcement plate 7, a rear torsion leg reinforcement plate 8 and a torsion leg sealing plate 9, wherein the torsion leg sealing plate 9 is welded to the left front longitudinal beam inner plate and the left front longitudinal beam outer plate through three three-layer welding points, and the two side panel folding edges 122 located on the front side of the torsion leg support plate are respectively welded to the side surfaces of the front longitudinal beam inner plate 3 through two welding points arranged upper and lower, so that there are 7 welding points between the torsion leg support box and the front longitudinal beam assembly, so that the torsion leg support box and the front longitudinal beam assembly form a solid connection.

[0051] The torsion leg sealing plate 9 is connected to the front sill inner panel 5 through three welding points, and the two side panel folding edges 122 located on the rear side of the torsion leg support plate are welded to the side surfaces of the front longitudinal beam inner panel 3 through four welding points and six welding points arranged upper and lower respectively, so that there are 13 welding points between the torsion leg support box and the front sill inner panel, so that a solid connection is formed between the torsion leg support box and the front sill inner panel.

[0052] The overall energy absorption of the box-shaped structure is relatively dispersed, and the energy can be dispersed to the four sides of the entire box (the energy was originally absorbed on three sides of the torsion leg support plate 1), that is, it is dispersed to the three sides of the torsion leg support plate 1 and the torsion leg sealing plate 9 to absorb energy, a total of four sides to absorb energy, greatly absorb energy and reduce the side collision intrusion amount and intrusion speed, thereby improving vehicle collision safety.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A VAN vehicle side impact energy absorption structure, used for welding with a vehicle body frame, characterized in that: The vehicle body frame includes a front floor, a front longitudinal beam inner panel, a front longitudinal beam outer panel, a front door sill inner panel and a front door sill outer panel, one side of the front floor is welded to the side of the front door sill inner panel, the front longitudinal beam inner panel and one side of the front longitudinal beam outer panel are stacked up and down to form a "J" shape, and the other side is welded to the surface of the front floor, and the front door sill outer panel is welded to the side of the front longitudinal beam inner panel away from the front floor; the energy absorption structure includes a box-shaped energy absorption structure composed of a twist leg support plate, a front twist leg reinforcement plate, a rear twist leg reinforcement plate and a twist leg sealing plate, the twist leg support plate includes a twist leg bottom plate and a twist leg side plate formed by extending upward from the left and right side edges of the twist leg bottom plate, a front twist leg reinforcement plate and a rear twist leg reinforcement plate are welded between the front and rear sides of the twist leg bottom plate and the twist leg side plates, and a twist leg sealing plate is welded on the upper sides of the two twist leg side plates; The front sides of the torsion leg side panels on the left and right sides are welded to the side faces of the inner panels of the front longitudinal beam, and the front sides of the torsion leg sealing plates are welded to the inner panels and outer panels of the front longitudinal beam through three layers of welding points; the rear sides of the torsion leg side panels on the left and right sides are welded to the side faces of the inner panels of the front sills, and the rear sides of the torsion leg sealing plates are welded to the upper surface of the inner panels of the front sills; the torsion leg bottom plate is welded to the front floor.

2. The VAN vehicle side impact energy absorption structure according to claim 1, characterized in that: The left and right sides of the twist leg sealing plate extend upward to form an arched reinforcement edge, and the front and rear sides of the twist leg sealing plate are bent in the same direction to form a front folding edge and a rear folding edge. The outer side surface of the arched reinforcement edge is welded to the twist leg side plate, and the lower surface of the front folding edge is welded to the front longitudinal beam inner plate and the front longitudinal beam outer plate through three layers of welding points, and the lower surface of the rear folding edge is welded to the upper surface of the front door sill inner plate.

3. The VAN vehicle side impact energy absorption structure according to claim 2, characterized in that: The overall shape of the twist leg side plate is a right-angled trapezoid, and the outer side surface of the arched reinforcement edge is welded to the oblique side surface close to the twist leg side plate, and 6 welding points are welded between the arched reinforcement edge and the twist leg side plate on the left and right sides along the oblique direction of the twist leg side plate; The lower surface of the front folded edge is welded to the front longitudinal beam inner plate and the front longitudinal beam outer plate through three three-layer welding points; the lower surface of the rear folded edge is welded to the upper surface of the front door sill inner plate through three welding points distributed in the left and right directions.

4. The VAN vehicle side impact energy absorption structure according to claim 1, characterized in that: The front and rear sides of the twist leg side panel on the left side extend to the left to form a side panel folded edge, and the front and rear sides of the twist leg side panel on the right side extend to the right to form a side panel folded edge. The side panel folded edge on the front side is welded to the side surface of the inner panel of the front longitudinal beam, and the side panel folded edge on the rear side is welded to the side surface of the inner panel of the front door sill.

5. The VAN vehicle side impact energy absorption structure according to claim 4, characterized in that: The two side panel folding edges located at the front side are respectively welded to the side surface of the inner panel of the front longitudinal beam through two welding points arranged upper and lower; An avoidance gap is formed on the side panel folded edge located on the rear side, and the side panel folded edge with the avoidance gap is welded to the side surface of the inner panel of the front door sill through four welding points arranged upper and lower; the side panel folded edge without the avoidance gap is welded to the side surface of the inner panel of the front door sill through six welding points arranged upper and lower.

6. The VAN vehicle side impact energy absorption structure according to claim 1, characterized in that: The front torsion leg reinforcement plate comprises a front reinforcement main body plate, front reinforcement folding edges located at both sides of the front reinforcement main body plate, and a front lower reinforcement folding edge located at the lower side edge of the front reinforcement main body plate, the front reinforcement folding edge is welded to the torsion leg side plate, and the front lower reinforcement folding edge is welded to the torsion leg bottom plate; The rear torsion leg reinforcement plate includes a rear reinforcement main body plate, rear reinforcement folded edges located at both side edges of the rear reinforcement main body plate, and a rear lower reinforcement folded edge located at the lower side edge of the rear reinforcement main body plate. The rear reinforcement folded edges are welded to the torsion leg side plates, and the rear lower reinforcement folded edges are welded to the torsion leg bottom plate.

7. The VAN vehicle side impact energy absorption structure according to claim 6, characterized in that: The two front reinforcing folds of the front twist leg reinforcing plate are respectively welded to the twist leg side plate through two welding points; the front lower reinforcing fold of the front twist leg reinforcing plate is welded to the twist leg bottom plate through two welding points; The two rear reinforcing folded edges of the rear twist leg reinforcement plate are respectively welded to the twist leg side plate through three welding points; the rear lower reinforcing folded edge of the rear twist leg reinforcement plate is welded to the twist leg bottom plate through two welding points.

8. The VAN vehicle side impact energy absorption structure according to claim 1, characterized in that: The twist leg bottom plate is welded to the front floor through 6 welding points.

9. The VAN vehicle side impact energy absorption structure according to claim 1, characterized in that: The twist leg bottom plate and the twist leg sealing plate are formed with a refueling pipe through hole.

10. A VAN vehicle, characterized in that: A side impact energy absorption structure as described in any one of claims 1 to 9 is adopted.

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