Vehicle body coupling structure and vehicle body

Abstract

A vehicle body coupling structure and a vehicle body are provided, in which the vehicle includes a lower body and an upper body coupled to the lower body, the vehicle body coupling structure includes a front dash beam assembly provided on a front side of the lower body, a first mounting portion provided on a front side member of the upper body and coupled to the front dash beam assembly, and a first body coupling portion provided on the front dash beam assembly and engaged with the first mounting portion.

Description

[0001] Cross-citation of related applications

[0002] This application claims the benefit of Korean Patent Application No. 10-2020-0177101, filed on December 17, 2020, which is incorporated herein by reference. Technical Field

[0003] The embodiments of the present invention relate to a vehicle body connection structure. Background Technology

[0004] Recently, the automotive industry has introduced new concepts and visions for the future of mobility, aiming to realize dynamic, human-centric future cities. One of these future mobility solutions is the purpose-built vehicle (PBV) as a unit of transportation based on purpose.

[0005] PBV is an environmentally friendly mobility solution that provides passengers with the necessary customized services on the ground during their journey to their destination, and can also use electric vehicles and artificial intelligence to set optimal routes and swarm driving for each situation.

[0006] For example, PBVs can set optimal routes and group driving for each situation, and can also be box-type vehicles with large interior space.

[0007] The body of this PBV consists of a lower body (also known in the industry as a rolling chassis or skateboard chassis) and an upper body mounted on the lower body. The battery module is mounted on the lower body. The upper body can be a space frame formed by welding steel plates or tubing.

[0008] However, this type of PBV has the problem that, due to the box-shaped design of the front body, the front frame has low strength and poor impact absorption performance in the event of a frontal collision.

[0009] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this invention, and therefore may contain information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0010] Embodiments of the present invention relate to a vehicle body connection structure. More specifically, embodiments of the present invention relate to a vehicle body connection structure for a private vehicle (PBV).

[0011] An embodiment of the present invention provides a vehicle body connection structure that improves the connection strength between the lower body and the upper body and ensures the frontal collision stability of the vehicle body.

[0012] According to an embodiment of the present invention, a vehicle body connection structure comprising a lower body and an upper body connected to the lower body includes: a front liner assembly disposed on the front side of the lower body; a first mounting portion disposed on the front side member of the upper body and connected to the front liner assembly; and a first body connection portion disposed on the front liner assembly and engaged with the first mounting portion.

[0013] In the vehicle body connection structure according to an embodiment of the present invention, the front liner assembly may include a front liner and a front impact box, the front impact box having a first main body connection portion and being connected to the front liner.

[0014] In the vehicle body connection structure according to an embodiment of the present invention, the front liner and the front impact box may be made of aluminum.

[0015] In the vehicle body connection structure according to an embodiment of the present invention, the first mounting portion may include: a first mounting bracket connected to the front portion of the front side member; a first bolt guide connected to the first mounting bracket; and a first mounting bolt connected to the first bolt guide.

[0016] In a vehicle body connection structure according to an embodiment of the present invention, the first main body connection portion may include a mounting nut that engages with a first mounting bolt that passes through the upper surface and is inserted into the interior of the front impact box.

[0017] In the vehicle body connection structure according to an embodiment of the present invention, the mounting nut can be engaged with the first mounting bolt through a mounting hole provided on the lower surface of the front impact box.

[0018] Furthermore, the vehicle body connection structure according to an embodiment of the present invention may further include: a front chassis frame connected to the rear side of the front liner assembly; a second mounting portion disposed on the center portion of the front side member and connected to the front portion of the front chassis frame; and a second main body connection portion disposed on the front portion of the front chassis frame and engaged with the second mounting portion.

[0019] In the vehicle body connection structure according to an embodiment of the present invention, the second main body connection portion can form a connection strength greater than that of the first main body connection portion.

[0020] In the vehicle body connection structure according to an embodiment of the present invention, the second mounting portion may include: a second mounting bracket connected to the center portion of the front component; a second bolt guide connected to the second mounting bracket; and a second mounting bolt connected to the second bolt guide.

[0021] In the vehicle body connection structure according to an embodiment of the present invention, the second main body connection portion may include: a tubular third bolt guide fixed within the closed section of the front chassis frame and supporting a second mounting bolt inserted through the upper surface into the interior of the front chassis frame; and a welding nut fixed to the lower surface of the front chassis frame and engaging with the second mounting bolt that penetrates the third bolt guide and the lower surface of the front chassis frame.

[0022] Furthermore, the vehicle body connection structure according to an embodiment of the present invention may further include: a third mounting portion disposed on the rear portion of the front side member and connected to the center portion of the front chassis frame; and a third main body connection portion disposed on the center portion of the front chassis frame and engaged with the third mounting portion.

[0023] In the vehicle body connection structure according to an embodiment of the present invention, the third mounting part may include: a third mounting bracket connected to the rear part of the front side member; a fourth bolt guide connected to the third mounting bracket; and a third mounting bolt connected to the fourth bolt guide.

[0024] In the vehicle body connection structure according to an embodiment of the present invention, the third main body connection part may include: a fixed bracket connected to the outer surface of the front chassis frame; and a mounting bushing fixed to the fixed bracket and engaged with a third mounting bolt.

[0025] In the vehicle body connection structure according to an embodiment of the present invention, the lower transverse member connected along the vehicle width direction may be disposed on the center of the front chassis frame.

[0026] In the vehicle body connection structure according to an embodiment of the present invention, the lower transverse member may include: a lower part, which is connected to the center part of the front chassis frame along the vehicle width direction; and an upper part, which is connected to the upper surface of the front chassis frame and connected to the lower part.

[0027] Furthermore, the vehicle body connection structure according to an embodiment of the present invention may further include: a central chassis frame connected to the rear side of the front chassis frame; a rear chassis frame connected to the rear side of the central chassis frame; a fourth mounting portion disposed on the rear side member of the upper body and connected to the rear chassis frame; and a fourth body connection portion disposed on the rear chassis frame and engaged with the fourth mounting portion.

[0028] In the vehicle body connection structure according to an embodiment of the present invention, the front side member can be connected in the vehicle width direction by an upper transverse member, and the upper transverse member can be connected to two side beams of the upper body.

[0029] Embodiments of the present invention can improve the structural strength of the lower and upper bodies and improve the frontal collision performance of vehicles.

[0030] Furthermore, the effects that can be obtained or are expected from the embodiments of the present invention are described directly or implicitly in the following detailed description. That is, various effects expected through the embodiments of the present invention will be described in the following detailed description. Attached Figure Description

[0031] The accompanying drawings are provided to describe embodiments of the invention, but the spirit of the invention should not be interpreted solely by the drawings.

[0032] Figure 1 This is a view showing an example of a vehicle to which a body connection structure according to an embodiment of the present invention can be applied.

[0033] Figure 2 This is an exploded perspective view showing the lower and upper main bodies of the vehicle body connection structure according to an embodiment of the present invention.

[0034] Figure 3 This is an exploded perspective view showing the first mounting portion and the first main body connecting portion of the vehicle body connecting structure applied according to an embodiment of the present invention.

[0035] Figure 4 This is a schematic cross-sectional view showing the joint between the first mounting portion and the first main body connecting portion of the vehicle body connecting structure applied according to an embodiment of the present invention.

[0036] Figure 5 This is an exploded perspective view showing the second mounting portion and the second main body connecting portion applied to the vehicle body connecting structure according to an embodiment of the present invention.

[0037] Figure 6 This is a schematic cross-sectional view showing the joint between the second mounting portion and the second main body connecting portion applied to the vehicle body connecting structure according to an embodiment of the present invention.

[0038] Figure 7 This is an exploded perspective view showing the third mounting portion and the third main body connecting portion applied to the vehicle body connecting structure according to an embodiment of the present invention.

[0039] Figure 8 This is a schematic cross-sectional view showing the joint between the third mounting portion and the third main body connecting portion applied to the vehicle body connecting structure according to an embodiment of the present invention.

[0040] Figure 9 This is a schematic cross-sectional view showing the lower transverse member of the lower body of the vehicle body connection structure applied according to an embodiment of the present invention.

[0041] The embodiments of the present invention can be described using the following elements in conjunction with the accompanying drawings.

[0042] 1: PBV

[0043] 10: Lower Main Body

[0044] 11: Front Liner Assembly

[0045] 12: Front Liner Beam

[0046] 13: Front chassis frame

[0047] 14: Front impact box

[0048] 15: Central chassis frame

[0049] 16a, 22: Front part

[0050] 16b, 24: Central part

[0051] 16c, 26: Rear

[0052] 16d: Closed section

[0053] 16e: Outer surface

[0054] 17: Rear chassis frame

[0055] 18: Lower transverse member

[0056] 19: Rear Liner Beam Assembly

[0057] 19a: Lower part

[0058] 19b: upper part

[0059] 20: Upper Main Body

[0060] 21: Front component

[0061] 23: Side component

[0062] 25: Side beam

[0063] 28: Upper transverse member

[0064] 29: Rear side component

[0065] 30: First Installation Department

[0066] 31: First mounting bracket

[0067] 35: First bolt guide

[0068] 37: First mounting bolt

[0069] 40: First main body connection part

[0070] 41: Install the nut

[0071] 43: First bolt connection hole

[0072] 45: Mounting hole

[0073] 50: Second Installation Section

[0074] 51: Second mounting bracket

[0075] 55: Second bolt guide

[0076] 57: Second mounting bolt

[0077] 60: Second main body connection part

[0078] 61: Third bolt guide

[0079] 63, 88: Welded nuts

[0080] 65: Second bolt connection hole

[0081] 70: Third Installation Department

[0082] 71: Third mounting bracket

[0083] 75: Fourth bolt guide

[0084] 77: Third mounting bolt

[0085] 80: Third main body connection part

[0086] 81: Fixed bracket

[0087] 83: Install bushings

[0088] 85: Outer shell

[0089] 87: Inner tube

[0090] 89: Rubber bushing

[0091] 90: Fourth Installation Department

[0092] 95: Fourth main body connection part

[0093] 100: Body connection structure Detailed Implementation

[0094] The invention will now be described more fully with reference to the accompanying drawings, in which embodiments of the invention are illustrated. As will be appreciated by those skilled in the art, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention.

[0095] To clearly describe the embodiments of the invention, components irrelevant to the description will be omitted, and the same reference numerals will be used throughout this specification to describe the same components.

[0096] For better understanding and ease of description, the dimensions and thicknesses of each configuration shown in the accompanying drawings are arbitrarily illustrated, and the invention is not limited thereto. Furthermore, for clarity, the thicknesses of layers, films, panels, regions, etc., have been enlarged.

[0097] In the following detailed description, the names of constituent elements with the same relationship are divided into "first", "second", etc., but the present invention is not limited to the order in the following description.

[0098] In addition, unless explicitly stated otherwise, the words “including” and variations such as “contains” or “covers” will be understood to imply the inclusion of the stated elements, but not the exclusion of any other elements.

[0099] In addition, the terms “…unit”, “…device”, “…section” and “…component” described in the specification refer to units in a general configuration that perform at least one function or operation.

[0100] Figure 1 This is a view showing an example of a vehicle to which a body connection structure according to an embodiment of the present invention can be applied.

[0101] See Figure 1 According to an embodiment of the present invention, the vehicle body connection structure 100 is applied to a special-purpose vehicle (PBV) 1.

[0102] The PBV 1 is an environmentally friendly mobility solution that provides passengers with essential customized services on the ground during their journey to their destination. Furthermore, the PBV 1 can be a box-type vehicle with a large interior space. The aforementioned box-type PBV 1 features a windshield (not shown in the figures) at the very front of the vehicle.

[0103] The PBV 1 includes a skateboard-type lower body 10 (also known in the industry as a rolling chassis) and an upper body 20 mounted on the lower body 10. Here, the battery assembly 3 is mounted on the lower body 10.

[0104] In the industry, the vehicle width direction is referred to as the L direction, the vehicle length direction (the front-to-back direction of the vehicle body) as the T direction, and the vehicle height direction as the H direction. However, in the embodiments of the present invention, the above-mentioned L, T, and H directions are not set as reference directions. Instead, the following constituent elements are described by setting the vehicle width direction, vehicle length direction, and height direction.

[0105] Additionally, the following end (one side end or the other side end) can be defined as the end on either side and a portion including that end (one side end or the other side end).

[0106] Figure 2This is an exploded perspective view showing the lower and upper main bodies of the vehicle body connection structure according to an embodiment of the present invention.

[0107] See Figure 1 and Figure 2 According to an embodiment of the present invention, the lower body 10 includes a front liner assembly 11, a front chassis frame 13, a central chassis frame 15, a rear chassis frame 17, and a rear liner assembly 19 that are connected to each other in the longitudinal direction of the vehicle body.

[0108] The front liner assembly 11 is disposed on the front side of the lower body 10, and the front chassis frame 13 is connected to the rear side of the front liner assembly 11. The center chassis frame 15 is connected to the rear side of the front chassis frame 13, the rear chassis frame 17 is connected to the rear side of the center chassis frame 15, and the rear liner assembly 19 is connected to the rear side of the rear chassis frame 17.

[0109] In the preceding text, the front liner assembly 11 includes a front liner 12 and a front impact box 14, which is connected to the rear side of the front liner 12 and has a closed cross-section with a rectangular cross-section. Here, the front impact box 14 of the front liner assembly 11 connects the front liner 12 and the front chassis frame 13.

[0110] Furthermore, the front chassis frame 13, the center chassis frame 15, and the rear chassis frame 17 are, for example, made of steel and formed with a closed cross-section in a rectangular shape. As described above, the front chassis frame 13 includes a front portion 16a, a center portion 16b, and a rear portion 16c integrally connected to each other in the longitudinal direction of the vehicle body. The front portion 16a is connected to the front impact box 14, and the rear portion 16c is connected to the center chassis frame 15.

[0111] In addition, the front chassis frame 13, the center chassis frame 15 and the rear chassis frame 17 include a lower transverse member 18 connected along the vehicle width direction.

[0112] Meanwhile, the upper body 20 is the main body connected to the lower body 10, and the upper body forms a carriage in the central part between the front and the rear. For example, the upper body 20 can be a spatial frame formed by a structure connected by steel plates or pipes.

[0113] The upper body 20 includes a front side member 21 and a side assembly 23, wherein the front side member is disposed on both sides of the front portion, and the side assembly is connected to the front side member 21 along the longitudinal direction of the vehicle body. As described above, the front side member 21 and the side assembly 23 are connected to the lower body 10.

[0114] As described above, the front member 21 includes a front portion 22, a central portion 24, and a rear portion 26 that are integrally connected to each other in the longitudinal direction of the vehicle body. Furthermore, the rear portion 26 of the front member 21 is connected in the vehicle width direction by an upper transverse member 28.

[0115] Additionally, as described above, the side assembly 23 has a side beam 25 formed at its lower end. The side beam 25 is connected to the upper transverse member 28 mentioned above.

[0116] Furthermore, the upper body 20 as described above includes a rear side member 29, which is disposed on both sides of the rear portion.

[0117] The vehicle body connection structure 100 according to an embodiment of the present invention, applied to the PBV 1 as described above, is formed by a structure that can improve the connection strength between the lower body 10 and the upper body 20 and improve the absorption performance of the collision load generated by the front collision of the vehicle body.

[0118] Therefore, the vehicle body connection structure 100 according to an embodiment of the present invention mainly includes a first mounting part 30 and a first main body connection part 40.

[0119] In an embodiment of the present invention, the first mounting part 30 is connected to the front liner beam assembly 11 of the lower body 10 and is disposed on the front part 22 of the front side member 21 in the upper body 20.

[0120] Furthermore, in an embodiment of the present invention, the first main body connecting part 40 engages with the first mounting part 30 and is disposed in the front impact box 14 of the front liner assembly 11.

[0121] The specific configuration of the first mounting part 30 and the first main body connecting part 40 will be described in detail below.

[0122] Figure 3 This is an exploded perspective view showing the first mounting portion and the first main body connecting portion of the vehicle body connecting structure applied according to an embodiment of the present invention, and Figure 4 This is a schematic cross-sectional view showing the joint between the first mounting portion and the first main body connecting portion of the vehicle body connecting structure applied according to an embodiment of the present invention.

[0123] See Figure 3 and Figure 4 According to an embodiment of the present invention, the first mounting part 30 includes a first mounting bracket 31, a first bolt guide 35 and a first mounting bolt 37.

[0124] The first mounting bracket 31 is connected to the front portion 22 of the front member 21. The first bolt guide 35 has a tubular shape with a circular cross-section and is connected to the first mounting bracket 31. Furthermore, the first mounting bolt 37 is connected to the first bolt guide 35.

[0125] According to an embodiment of the present invention, the first main body connection portion 40 includes a mounting nut 41 disposed at the front impact box 14 of the front liner assembly 11. The mounting nut 41 engages with a first mounting bolt 37 that passes through the upper surface and inserts into the interior of the front impact box 14.

[0126] Here, a first bolt connection hole 43 is formed on the upper surface of the front impact box 14, and a first mounting bolt 37 is fitted into the first bolt connection hole. In addition, a mounting nut 41 engages with the first mounting bolt 37 through a mounting hole 45 provided in the lower surface of the front impact box 14.

[0127] On the other hand, see Figure 1 and Figure 2 According to an embodiment of the present invention, the vehicle body connection structure 100 further includes a second mounting portion 50 and a second main body connection portion 60.

[0128] In an embodiment of the present invention, the second mounting part 50 is connected to the front part 16a of the front chassis frame 13 and is disposed on the center part 24 of the front side member 21.

[0129] Furthermore, in an embodiment of the present invention, the second main body connecting part 60 engages with the second mounting part 50 and is disposed on the front part 16a of the front chassis frame 13.

[0130] The specific configuration of the second mounting section 50 and the second main body connecting section 60 will be described in detail below.

[0131] Figure 5 This is an exploded perspective view showing the second mounting portion and the second main body connecting portion applied to the vehicle body connecting structure according to an embodiment of the present invention, and Figure 6 This is a schematic cross-sectional view showing the joint between the second mounting portion and the second main body connecting portion applied to the vehicle body connecting structure according to an embodiment of the present invention.

[0132] See Figure 5 and Figure 6 According to an embodiment of the present invention, the second mounting part 50 includes a second mounting bracket 51, a second bolt guide 55, and a second mounting bolt 57.

[0133] The second mounting bracket 51 is connected to the center portion 24 of the front member 21. The second bolt guide 55 has a tubular shape with a circular cross-section and is connected to the second mounting bracket 51. In addition, the second mounting bolt 57 is connected to the second bolt guide 55.

[0134] According to an embodiment of the present invention, the second main body connection portion 60 includes a third bolt guide 61 and a welding nut 63 disposed on the front portion 16a of the front chassis frame 13.

[0135] The third bolt guide 61 is a tubular tube with a circular cross-section and is fixed inside the front portion 16a of the front chassis frame 13, which has a square closed cross-section 16d. The third bolt guide 61 is the insertion position of the second mounting bolt 57 and supports the second mounting bolt 57, which passes through the upper surface and is inserted into the front portion 16a of the front chassis frame 13.

[0136] Here, a second bolt connection hole 65 is formed on the upper surface of the front portion 16a of the front chassis frame 13 to allow the second mounting bolt 57 to be assembled into the third bolt guide 61.

[0137] The welding nut 63 is secured to the underside of the front portion 16a of the front chassis frame 13. The welding nut 63 engages with the second mounting bolt 57, which passes through the third bolt guide 61 and through the lower surface of the front portion 16a of the front chassis frame 13.

[0138] As described above, the connection strength formed by the engagement of the second main body connecting portion 60 and the second mounting portion 50 is greater than the connection strength formed by the engagement of the first main body connecting portion 40 and the first mounting portion 30.

[0139] This is because the first mounting part 30 engages with the front liner assembly 11 made of aluminum, while the second mounting part 50 engages with the front chassis frame 13 made of steel. Additionally, the second mounting bolt 57 penetrates the lower surface of the third bolt guide 61 and the front chassis frame 13 for engagement.

[0140] On the other hand, see Figure 1 and Figure 2 According to an embodiment of the present invention, the vehicle body connection structure 100 further includes a third mounting portion 70 and a third main body connection portion 80.

[0141] In an embodiment of the present invention, the third mounting part 70 is connected to the center part 16b of the front chassis frame 13 and is disposed on the rear part 26 of the front side member 21.

[0142] Furthermore, in an embodiment of the present invention, the third main body connecting part 80 engages with the third mounting part 70 and is disposed on the center part 16b of the front chassis frame 13.

[0143] The specific configuration of the third mounting section 70 and the third main body connecting section 80 will be described in detail below.

[0144] Figure 7 This is an exploded perspective view showing the third mounting portion and the third main body connecting portion applied to the vehicle body connecting structure according to an embodiment of the present invention, and Figure 8 This is a schematic cross-sectional view showing the joint between the third mounting portion and the third main body connecting portion applied to the vehicle body connecting structure according to an embodiment of the present invention.

[0145] See Figure 7 and Figure 8 According to an embodiment of the present invention, the third mounting part 70 includes a third mounting bracket 71, a fourth bolt guide 75, and a third mounting bolt 77.

[0146] The third mounting bracket 71 is connected to the rear 26 of the front member 21. The fourth bolt guide 75 has a tubular shape with a circular cross-section and is connected to the third mounting bracket 71. In addition, the third mounting bolt 77 is connected to the fourth bolt guide 75.

[0147] According to an embodiment of the present invention, the third main body connection portion 80 includes a fixing bracket 81 and a mounting bushing 83 disposed on the center portion 16b of the front chassis frame 13.

[0148] The mounting bracket 81 is connected to the outer surface 16e of the center portion 16b of the front chassis frame 13. The mounting bushing 83 is fixed to the mounting bracket 81 and engaged with the third mounting bolt 77.

[0149] Here, the mounting bushing 83 includes a housing 85, an inner tube 87 disposed inside the housing 85, and a rubber bushing 89 coupled between the housing 85 and the inner tube 87.

[0150] In the above description, the inner tube 87 is the part for mounting the third mounting bolt 77, and the weld nut 88 is connected at the bottom. Therefore, the third mounting bolt 77 can be mounted into the inner tube 87 and can engage with the weld nut 88.

[0151] Thus, in the lower main body 10 connected to the third mounting part 70 via the third main body connecting part 80, the lower transverse member 18, as described above, is connected to the center part 16b of the front chassis frame 13 along the vehicle width direction.

[0152] like Figure 9 As shown, the lower transverse member 18 includes: a lower portion 19a, which is connected to the center portion 16b of the front chassis frame 13 along the vehicle width direction; and an upper portion 19b, which is connected to the upper surface of the center portion 16b and connected to the lower portion 19a.

[0153] The lower part 19a and above have an opening at the end. Form configuration. The upper part 19b is connected to the upper end of the lower part 19a, and is connected to the upper surface of the central part 16b through both ends.

[0154] On the other hand, see Figure 1 and Figure 2 According to an embodiment of the present invention, the vehicle body connection structure 100 further includes a fourth mounting portion 90 and a fourth main body connection portion 95.

[0155] In an embodiment of the present invention, the fourth mounting part 90 is connected to the rear chassis frame 17 of the lower body 10 and is disposed on the rear side member 29 of the upper body 20.

[0156] Furthermore, in an embodiment of the present invention, the fourth main body connecting part 95 engages with the fourth mounting part 90 and is disposed on the outer surface of the rear chassis frame 17.

[0157] The configuration of the fourth mounting portion 90 and the fourth main body connecting portion 95 as described above is the same as the configuration of the third mounting portion 70 and the third main body connecting portion 80 as described above. Therefore, a more detailed description of the fourth mounting portion 90 and the fourth main body connecting portion 95 is omitted in this specification.

[0158] In the following, the effects of the vehicle body connection structure 100 configured as described above according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings disclosed above.

[0159] First, in an embodiment of the present invention, the front part 22 of the front side member 21 of the upper body 20 is joined to the front liner assembly 11 of the lower body 10 via the first mounting part 30.

[0160] Here, the first mounting portion 30 engages with the first main body connecting portion 40 provided in the front impact box 14 of the front liner assembly 11. In this case, since the front liner 12 and the front impact box 14 of the front liner assembly 11 are made of aluminum, the first connecting section of the first main body connecting portion 40 and the first mounting portion 30 is formed as a weak main body section.

[0161] Furthermore, in an embodiment of the present invention, the central portion 24 of the front member 21 is engaged with the front portion 16a of the front chassis frame 13 located on the rear side of the front liner assembly 11 via the second mounting portion 50.

[0162] In the above description, the second mounting portion 50 engages with the second main body connecting portion 60 provided in the front portion 16a of the front chassis frame 13. In this case, the second connecting section of the second main body connecting portion 60 and the second mounting portion 50 is formed as a rigid main body section with a greater connecting strength than the first connecting section.

[0163] In addition, in an embodiment of the present invention, the rear portion 26 of the front member 21 is engaged with the center portion 16b of the front chassis frame 13 via the third mounting portion 70.

[0164] Here, the third mounting portion 70 engages with the third main body connection portion 80 located in the center portion 16b of the front chassis frame 13. In this case, the third connection section of the third main body connection portion 80 and the third mounting portion 70 is formed by a rigid main body section connected to the second connection section.

[0165] Furthermore, in one embodiment of the present invention, the rear component 29 of the upper body 20 is engaged with the rear chassis frame 17 of the lower body 10 via the fourth mounting portion 90.

[0166] The fourth mounting portion 90 engages with the fourth main body connection portion 95 provided on the outer surface of the rear chassis frame 17. In this case, the fourth connection section of the fourth main body connection portion 95 and the fourth mounting portion 90 is formed by a rigid main body section connected to the third connection section.

[0167] Therefore, in embodiments of the present invention, when a vehicle is involved in a frontal collision (e.g., a frontal side collision and a small frontal overlap collision), the vehicle body deformation first occurs in the first connecting section, which is a weak section, and the vehicle body deformation is minimized in the second, third, and fourth connecting sections, which are rigid sections.

[0168] Therefore, in embodiments of the present invention, the collision load generated by a frontal collision of the vehicle is absorbed in the first connecting section, and the collision load is transferred and distributed to the second, third and fourth connecting sections, thereby improving the frontal collision performance of the vehicle.

[0169] In addition, in embodiments of the present invention, the overall connection strength and structural strength of the lower body 10 and the upper body 20 can be improved by using the first connecting section, the second connecting section, the third connecting section and the fourth connecting section.

[0170] Furthermore, in embodiments of the present invention, since the lower transverse member 18 in the third connecting section is composed of a lower part 19a and an upper part 19b, the battery assembly can be prevented from being damaged by the impact of the drive motor due to the deformation of the vehicle body when the vehicle collides in front.

[0171] Although the invention has been described in conjunction with embodiments now considered practical, it should be understood that the invention is not limited to the disclosed embodiments. Rather, the invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A vehicle body connection structure, the vehicle comprising a lower body and an upper body connected to the lower body, the vehicle body connection structure comprising: The front liner assembly is disposed on the front side of the lower body; The first mounting part is disposed on the front side member of the upper body and connected to the front liner beam assembly; as well as The first main body connecting part is disposed on the front liner assembly and engages with the first mounting part; The front liner assembly includes: Front liner beam; and A front impact box having the first main body connecting portion, the front impact box being connected to the front liner beam; The first mounting part includes: The first mounting bracket is connected to the front part of the front component; A first bolt guide is connected to the first mounting bracket; and The first mounting bolt is connected to the first bolt guide; The first main body connecting portion includes a mounting nut, which engages with a first mounting bolt that passes through the upper surface and inserts into the interior of the front impact box; and The mounting nut engages with the first mounting bolt through a mounting hole provided on the lower surface of the front impact box.

2. The vehicle body connection structure according to claim 1, wherein the front liner and the front impact box comprise aluminum.

3. The vehicle body connection structure according to claim 1, wherein: The upper body includes two side beams located on opposite sides of the vehicle; The front component is connected in the vehicle width direction by an upper transverse component; and The upper transverse member is connected to the two side beams of the upper body.

4. A vehicle body connection structure, the vehicle comprising a lower body and an upper body connected to the lower body, the vehicle body connection structure comprising: The front liner assembly is disposed on the front side of the lower body; The first mounting part is disposed on the front side member of the upper body and connected to the front liner beam assembly; as well as The first main body connecting part is disposed on the front liner assembly and engages with the first mounting part; The front chassis frame is connected to the rear side of the front liner assembly; The second mounting part is disposed on the center part of the front component and connected to the front part of the front chassis frame; as well as The second main body connecting part is disposed on the front part of the front chassis frame and engages with the second mounting part. Wherein, the connection strength of the second main body connecting part is greater than the connection strength of the first main body connecting part; The second mounting part includes: The second mounting bracket is connected to the center portion of the front component; The second bolt guide is connected to the second mounting bracket; and The second mounting bolt is connected to the second bolt guide. The second main body connecting part includes: A tubular third bolt guide, fixed within a closed section of the front chassis frame and configured to support a second mounting bolt inserted through its upper surface into the interior of the front chassis frame; and Weld nuts are used to secure the front chassis frame to the lower surface and engage with the second mounting bolt that penetrates the third bolt guide and the lower surface of the front chassis frame.

5. The vehicle body connection structure according to claim 4, wherein, The first mounting part includes: The first mounting bracket is connected to the front part of the front component; A first bolt guide is connected to the first mounting bracket; and The first mounting bolt is connected to the first bolt guide.

6. The vehicle body connection structure according to claim 4 further includes: The third mounting part is disposed on the rear part of the front component and connected to the center part of the front chassis frame; as well as The third main body connection part is disposed on the center part of the front chassis frame and engages with the third mounting part.

7. The vehicle body connection structure according to claim 6, wherein, The third mounting part includes: The third mounting bracket is connected to the rear of the front component; The fourth bolt guide is connected to the third mounting bracket; and The third mounting bolt is connected to the fourth bolt guide.

8. The vehicle body connection structure according to claim 7, wherein the third main body connection portion comprises: A fixed bracket is attached to the outer surface of the front chassis frame; as well as Install the bushing, secure it to the mounting bracket, and engage it with the third mounting bolt.

9. The vehicle body connection structure according to claim 6 further includes a lower transverse member, the lower transverse member being disposed on the center portion of the front chassis frame and connected along the vehicle width direction.

10. The vehicle body connection structure according to claim 9, wherein the lower transverse member comprises: The lower part is connected to the center portion of the front chassis frame along the width direction of the vehicle; as well as The upper part is connected to the upper surface of the front chassis frame and to the lower part.

11. The vehicle body connection structure according to claim 6, further comprising: A central chassis frame is connected to the rear side of the front chassis frame; The rear chassis frame is connected to the rear side of the central chassis frame; The fourth mounting part is disposed on the rear side component of the upper body and connected to the rear chassis frame; as well as The fourth main body connection part is disposed on the rear chassis frame and engages with the fourth mounting part.

12. The vehicle body connection structure according to claim 4, wherein the vehicle further comprises: Two side beams located on opposite sides of the vehicle body; as well as An upper transverse member is connected to the two side beams, wherein the front side member is connected via the upper transverse member in the vehicle width direction.

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