Rear body structure of the vehicle

Abstract

The present invention provides a rear body structure of a vehicle, comprising: a side member outer panel, a rear side panel inner panel, and a first reinforcing member, wherein the side member outer panel forms a lower portion of a vehicle body side, extends in a front-rear longitudinal direction of the vehicle, and includes a joining surface portion on a rear end portion thereof; the rear side panel inner panel is connected to the side member outer panel and forms a rear side surface of the vehicle body located behind a rear door; the first reinforcing member is joined to the side member outer panel and the rear side panel inner panel and is configured to cover a joining portion between the side member outer panel and the rear side panel inner panel, wherein the joining surface portion protrudes rearward and is joined to a surface of the rear side panel inner panel.

Description

Technical Field

[0001] The present invention relates to a rear body structure of a vehicle. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] Generally, the upper portion of the vehicle body includes a roof forming the top of the vehicle and at least one pillar supporting the roof and arranged along the front-rear longitudinal direction of the vehicle.

[0004] The at least one pillar typically includes: a front pillar (A-pillar) arranged at the front of the vehicle; a rear pillar (C-pillar) arranged at the rear of the vehicle; and a center pillar (B-pillar) arranged between the front pillar and the rear pillar relative to the front-rear longitudinal direction of the vehicle.

[0005] In addition, the vehicle doors are installed on the sides of the vehicle body between the front pillar and the center pillar and between the rear pillar and the center pillar to open and close the opening portion on the side of the vehicle body.

[0006] In a vehicle, the underbody forming the cabin floor may be composed of a front floor, a center floor, and a rear floor to cope with side and rear collisions, and side frame members are arranged along the front-rear longitudinal direction of the vehicle at each of the opposite ends of the front floor and the rear floor in the vehicle width direction.

[0007] In addition, the panel installed in the outer panel of the vehicle body at the rear side of the vehicle body facing the rear of the rear door is generally called the rear quarter panel. The rear quarter panel includes a rear quarter inner panel arranged inside the rear quarter panel and a rear quarter outer panel arranged outside the rear quarter panel.

[0008] In this case, each of the rear floor side members and the wheel house inner panel is joined to the vehicle width direction opposite end portions of the rear floor, and the quarter inner panel is joined to the outer side upper portion of the wheel house inner panel.

[0009] Furthermore, the quarter panel inner panel and the quarter panel outer panel located on the outer side thereof are joined to each other with a space defined therebetween, and constitute the quarter panel.

[0010] At the same time, vehicle manufacturers often conduct crash tests during the vehicle development process. For example, the Insurance Institute for Highway Safety (IIHS) in North America conducts side impact tests on vehicles and can evaluate the vehicle's crash safety by evaluating the test results.

[0011] Furthermore, during vehicle development, vehicle manufacturers are developing and applying a structure that strengthens the vehicle body in order to cope with crash tests and ensure safety during vehicle collisions, and are designing the vehicle body in consideration of the changed conditions even when the evaluation method of the crash test changes.

[0012] The Insurance Institute for Highway Safety (IIHS) plans to change its side impact test methodology to take into account various vehicle crash modes in the field. Compared to the existing IIHS crash test, the revised IIHS crash test incorporates more enhanced side impact conditions, such as increased weight and strength of the moving deformable barrier (MDB), increased vehicle impact speed, and reduced ground clearance.

[0013] Accordingly, in order to cope with evaluation of a side impact test under a side impact condition that is more severe than the existing side impact condition, it is necessary to develop a vehicle body structure having increased strength.

[0014] When the enhanced side impact condition of the Insurance Institute for Highway Safety (IIHS) is applied to the conventional body structure, the conventional body structure experiences excessive deformation in the body structure located at the lower end of the rear door opening portion.

[0015] In more detail, in the existing Insurance Institute for Highway Safety (IIHS) side impact test, compared with the enhanced Insurance Institute for Highway Safety (IIHS) impact test, the side mobile deformable barrier (MDB) has a higher ground clearance and the strength of the barrier is distributed throughout it, so the door part of the vehicle is severely deformed.

[0016] Accordingly, in a conventional vehicle body structure, in order to suppress deformation of the vehicle body portion located behind the rear door opening portion, when the door is closed, the anti-collision beam located on the inner side of the door is located at the portion of the door to which the side collision load is applied, and a structure that increases the amount of overlapping portion between the anti-collision beam and the vehicle body is generally adopted.

[0017] In addition, when the anti-collision beam of the vehicle door moves toward the vehicle inside and deforms during a vehicle collision, in order to further increase the overlap between the anti-collision beam and the vehicle body, the shape of the rear end portion of the side member outer panel is enlarged or a separate reinforcement member is installed inside it.

[0018] However, this structure is a partially reinforced structure that only considers lateral collision loads, so the longitudinal connection between the side member outer panel and the rear quarter panel is insufficient, thereby reducing the effectiveness of the body frame.

[0019] Furthermore, in consideration of the design and structural characteristics of the vehicle, a reinforcement member is installed on the vehicle body panel to suppress deformation of the inner side of the rear side portion of the vehicle body in the event of excessive deformation of the vehicle body. However, the applicant has discovered that in conventional vehicle body structures, the fragile connection structure between the reinforcement member on the inner side of the vehicle body and the vehicle body panel needs to be improved.

[0020] The applicant further discovered that, recently, due to the characteristics of vehicle door design, providing a reinforcement structure for the side sill outer panel is limited, and when the enhanced side collision mode is applied to a conventional vehicle body structure, the deformation amount of each of the rear door lower end and the rear wheel arch portion may increase significantly.

[0021] As described above, the ground clearance of the mobile deformable barrier (MDB) used for the side collision of the advanced Insurance Institute for Highway Safety (IIHS) side collision test is lower, and the strength of the outer side of the main body of the mobile deformable barrier increases the strength of the side collision than the traditional mobile deformable barrier. Therefore, the mobile deformable barrier used in the advanced side collision mode has different targeted aspects from the mobile deformable barrier used in the existing side collision mode. Summary of the Invention

[0022] The present invention provides a vehicle body structure that can reduce vehicle body weight and ensure cost competitiveness only through simple structural improvements, and has increased strength to reduce deformation of the vehicle body during a side collision.

[0023] In particular, the present invention provides a rear-side body structure of a vehicle, which can compensate for the fragility of the connection between the panels of the body structure compared to a conventional body structure, and suppress the deformation of the body in a side collision mode stronger than the existing side collision mode, thereby increasing the rigidity of the body and strengthening the body structure to resist side collisions.

[0024] According to one form of the present invention, a rear body structure of a vehicle is provided, which includes: a side beam outer panel, a rear side panel inner panel and a first reinforcement member, the side beam outer panel forming the lower portion of the body side, extending in the front-rear longitudinal direction of the vehicle, and including a joining surface portion on its rear end portion; the rear side panel inner panel forming the rear side of the body located behind the rear door and connected to the side beam outer panel; the first reinforcement member is joined to the side beam outer panel and the rear side panel inner panel and is configured to cover the joining portion between the side beam outer panel and the rear side panel inner panel, wherein the joining surface portion protrudes rearward and is joined to the surface of the rear side panel inner panel, thereby ensuring the longitudinal connection between the two panels.

[0025] Accordingly, according to the rear vehicle body structure of the vehicle of the present invention, the vehicle body weight can be reduced, cost competitiveness can be ensured only through simple structural improvements, and deformation of the vehicle body during a side collision can be reduced.

[0026] In addition, the rear body structure of the vehicle according to the present invention can compensate for the connection fragility between the panels of the body structure compared to the conventional body structure, and suppress the deformation of the body structure in side collision modes that are stronger than the existing side collision modes, thereby increasing the rigidity of the body and strengthening the body structure to resist side collisions.

[0027] Other areas of applicability will become apparent from the description provided herein.It should be understood that the description and specific examples are intended for illustration purposes only and are not intended to limit the scope of protection of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order that the invention may be better understood, various forms thereof will now be described by way of example only, with reference to the accompanying drawings, in which:

[0029] Figure 1 is a perspective view showing a joint portion between a side member outer panel and a quarter panel inner panel in a rear vehicle body structure of a vehicle according to one form of the present invention;

[0030] Figure 2 is a perspective view showing an installation state of a first reinforcement member in a rear vehicle body structure of a vehicle according to one form of the present invention;

[0031] Figure 3 is a side view showing important structures of a rear body structure of a vehicle according to one form of the present invention;

[0032] Figure 4 is a perspective view showing an installation state of a second reinforcement member in a rear vehicle body structure of a vehicle according to one form of the present invention;

[0033] Figure 5 is a perspective view showing a rear vehicle body structure of a vehicle and an anti-collision beam located inside a vehicle door according to one form of the present invention;

[0034] Figure 6 is a perspective view showing a state of a third reinforcement member mounted on the vehicle body inner side in the rear vehicle body structure of a vehicle according to one form of the present invention; and

[0035] Figure 7 It is along Figure 6 A cross-sectional view taken along line AA in FIG.

[0036] The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. DETAILED DESCRIPTION

[0037] The following description is merely exemplary in nature and is not intended to limit the present invention, its application or uses. It should be understood that throughout the specification and drawings, corresponding reference numerals indicate the same or corresponding parts and features.

[0038] At the same time, it should be understood that although the terms first, second, etc. are used here to describe each element, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the concept of the present invention, the first element discussed below can be referred to as the second element. Similarly, the second element can also be referred to as the first element.

[0039] It should be understood that when an element is referred to as being "coupled" or "connected" to another element, it can be directly coupled or connected to the other element, or intervening elements may be present. Conversely, it should be understood that when an element is referred to as being "directly coupled" or "directly connected" to another element, there are no intervening elements. Other expressions that explain the relationship between elements, such as "between," "directly between," "adjacent," or "directly adjacent," should be interpreted in the same manner.

[0040] In this specification, unless otherwise specified in the phrase, the singular form also includes the plural form. As used herein, "comprise" and / or "comprising" does not exclude the existence or addition of one or more other components, steps, actions and / or elements described.

[0041] Various forms of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] The present invention relates to a rear vehicle body structure of a vehicle. More specifically, the present invention relates to a vehicle body structure that can reduce vehicle weight while ensuring cost competitiveness through simple structural improvements, while also increasing strength to reduce deformation of the vehicle body during a side collision.

[0043] In addition, the present invention provides a rear body structure of a vehicle, which can compensate for the fragility of the connections between the various parts of the body compared to the traditional body structure, and suppress the deformation of the body structure in a side collision mode stronger than the existing side collision mode, thereby increasing the rigidity of the body and strengthening the body structure to resist side collisions.

[0044] To this end, in the rear body structure of the vehicle according to the present invention, multi-directional load paths of side collision loads are provided and the dispersion performance of the vehicle body side collision loads is enhanced, thereby promoting the reinforcement of the vehicle body frame and improving the effectiveness of the reinforcement.

[0045] In particular, in the rear body structure of the vehicle according to the present invention, considering the connection between the body structure and the door anti-collision beam, the multi-directional load path structure of the side collision load is applied to the body structure of the lower part of the rear pillar (C-pillar) which is excessively deformed during the side collision of the vehicle, thereby effectively dispersing the collision load and increasing the collision resistance and rigidity of the body frame.

[0046] A form of the rear body structure of the vehicle of the present invention will be described in detail below with reference to the accompanying drawings. Figure 1 1 is a perspective view showing a rear vehicle body structure 1 of a vehicle according to one form of the present invention. Figure 1 A state is shown in which the rear end portion of the side sill outer panel 11 and the lower end portion of the quarter inner panel 21 are joined to each other.

[0047] In the following description, the L direction refers to the front-rear longitudinal direction of the vehicle; the T direction refers to the left-right width direction of the vehicle; and the H direction refers to the vertical direction of the vehicle.

[0048] Furthermore, the terms "T-surface" and "T-surface contact" refer to contact surfaces on vehicle body components, namely, panels and reinforcement members described later, that are perpendicular or approximately perpendicular to the front-rear longitudinal direction of the vehicle, and the contact therewith. Furthermore, the terms "L-surface" and "L-surface contact" refer to contact surfaces on panels and reinforcement members that are perpendicular or approximately perpendicular to the left-right width direction of the vehicle, and the contact therewith, respectively.

[0049] In addition, H surface and H surface contact refer to the contact surface perpendicular or approximately perpendicular to the vertical direction of the vehicle on the plate and reinforcement member and the contact thereof. Here, the contact surface refers to the surface that contacts and bonds with other plates or other members.

[0050] like Figure 1 As shown, in the rear body structure 1 of a vehicle according to one form of the present invention, the rear end portion of the side member outer panel 11 is joined and bonded to the lower end portion of the rear quarter inner panel 21. In this case, the two panels 11, 21 can be fixed to each other by welding.

[0051] When the side sill outer panel 11 is joined to a side sill inner panel (not shown), the side sill outer panel 11 is a panel that forms the side sill member 10. The side sill member 10 is a vehicle body portion having a closed cross-sectional shape whose outline is determined when the side sill outer panel 11 and the side sill inner panel are joined to each other. The side sill member 10 is a vehicle body portion that forms the side lower portion of the vehicle body and is arranged to extend in the front-rear longitudinal direction of the vehicle.

[0052] In the vehicle body structure, rear floor side members 50 and wheel house inner panels are joined to opposite side ends of the rear floor 2. The rear floor side members 50 are joined to rear end portions of the side sill members 10. Furthermore, the quarter panel 21 is joined to the outer upper portion of the wheel house inner panel.

[0053] Furthermore, a rear quarter panel (not shown) is joined to the outer sides of the side sill outer panel 11 and the rear quarter inner panel 21 of the side sill member 10. An opening for mounting the rear door is formed in the rear quarter panel. The rear door is mounted in the opening to open and close. In this case, the rear quarter panel and the rear door outer panel together form the exterior appearance of the vehicle's rear side.

[0054] As described above, the rear end of the side sill outer panel 11 forming the side sill member 10 is joined to the lower end of the quarter inner panel 21. The quarter inner panel 21 and the quarter outer panel are joined so as to define a space therebetween toward the outside of the quarter inner panel 21.

[0055] Accordingly, the quarter panel 20 includes a quarter inner panel 21 disposed inside thereof and a quarter outer panel disposed outside thereof, and a first reinforcement member 30 described later is installed between the quarter inner panel 21 and the quarter outer panel.

[0056] Accordingly, the quarter panel 20 composed of the quarter inner panel 21 and the quarter outer panel, together with the side sill member 10 composed of the side sill outer panel 11 and the side sill inner panel, the rear pillar, and the rear floor side member 50 form a rear side portion of the vehicle.

[0057] In addition, if Figure 1 As shown, when the rear end portion of the side sill outer panel 11 and the lower end portion of the rear quarter inner panel 21, which are high-strength plate members, are joined to each other, the side sill outer panel 11 has a plurality of protruding joining surface portions 12 a and 12 b, which are formed by extending at portions corresponding to a predetermined width of the end portion of the rear end portion of the side sill outer panel 11 to have a protruding shape in the longitudinal direction of the side sill outer panel 11.

[0058] Accordingly, a plurality of protruding bonding surface portions 12a and 12b formed in a protruding shape on the rear end portion of the side member outer panel 11 include a first bonding surface portion 12a having a T-surface shape in T-surface contact with the upper surface of the lower end portion of the rear side inner panel 21 and a second bonding surface portion 12b having an L-surface shape in L-surface contact with the side surface of the lower end portion of the rear side inner panel 21.

[0059] That is, the T-surface and L-surface of the bonding surface portions 12a and 12b formed on the end portion of the rear end portion of the side sill outer panel 11 have shapes and structures capable of bonding with the surface of the quarter inner panel 21 to form T-surface contact and L-surface contact, respectively, with the surface of the quarter inner panel 21. Accordingly, in the present invention, the longitudinal connection between the side sill outer panel 11 and the quarter inner panel 21 can be ensured, and the longitudinal connection can be improved compared to conventional vehicle body structures.

[0060] Figure 2The figure shows a state where a first reinforcement member 30 is installed on a rear end portion of a side sill outer panel 11 and a lower end portion of a quarter panel inner panel 21 in a rear vehicle body structure 1 of a vehicle according to one embodiment of the present invention.

[0061] As shown in the figure, when the side sill outer panel 11 and the rear quarter inner panel 21 are joined to each other, the first reinforcement member 30 is joined to the surfaces of both panels. In this case, the first reinforcement member 30 is arranged to cover the rear end portion of the side sill outer panel 11 and the lower end portion of the rear quarter inner panel 21 from above, and is fixed to the rear end portion of the side sill outer panel 11 and the lower end portion of the rear quarter inner panel 21 by a joining method such as welding.

[0062] Therefore, the first reinforcing member 30 is installed on the joint portion between the side sill outer panel 11 and the rear side inner panel 21, thereby increasing the longitudinal connection between the side sill outer panel 11 and the rear side inner panel 21 as vehicle body components, and also increasing the transverse connection between vehicle body components including the first reinforcing member 30. Further, the deformation of the lower portion of the rear pillar (C-pillar) and the wheel arch portion can be effectively suppressed.

[0063] Figure 3 FIG. 1 is a side view of a rear vehicle body structure 1 of a vehicle according to one form of the present invention. Figure 3 It is shown that the connection between the side sill outer panel 11 and the quarter inner panel 21 in the longitudinal direction D1 and the transverse direction D2 can be strengthened by installing the first reinforcement member 30 on the side sill outer panel 11 and the quarter inner panel 21 .

[0064] As shown in the figure, the first reinforcement member 30 is joined to the joint portion between the rear end portion of the side sill outer panel 11 and the lower end portion of the rear quarter inner panel 21, thereby improving the connection between these components of the vehicle body in the arrow directions, namely the longitudinal direction D1 and the lateral direction D2.

[0065] at the same time, Figure 4 1 is a perspective view showing the important structure of the rear vehicle body structure 1 of a vehicle according to one form of the present invention, and shows a state where the second reinforcement member 40 is installed between the lower end portion of the rear quarter inner panel 21 and the first reinforcement member 30. Figure 4 In the figure, in order to show the installation state of the second reinforcement member 40 located inside the first reinforcement member, the surface of the first reinforcement member 30 is shown transparent, and only the outer shape of the first reinforcement member 30 is shown with a solid line.

[0066] In one embodiment of the present invention, the first reinforcement member 30 is installed with a predetermined distance from the joint portion between the side sill outer panel 11 and the rear quarter inner panel 21. Therefore, an empty space exists inside the joint portion between the two panels 11, 21 and the first reinforcement member 30. In this structure, the second reinforcement member 40 is installed in the empty interior space between the two panels 11, 21 and the first reinforcement member 30.

[0067] The second reinforcement member 40 may be a plate-shaped member. In this case, a second reinforcement member bonding surface portion 41 bonded to each of the surfaces of the two panels 11 and 21 and the first reinforcement member 30 may be formed along the periphery of the second reinforcement member 40 .

[0068] In this case, the second reinforcement member 40 may be a rectangular plate member as a whole. In the second reinforcement member 40, the second reinforcement member bonding surface portion 41 has a shape bent at its rectangular plate so as to be bonded to the side sill outer panel 11, the rear quarter inner panel 21, and the surface of the first reinforcement member 30 located adjacent to the second reinforcement member bonding surface portion 41.

[0069] In this case, when the second reinforcement member 40 is located in the space defined by the side sill outer panel 11, the rear side inner panel 21 and the first reinforcement member 30, the second reinforcement member bonding surface portion 41 forming the periphery of the second reinforcement member 40 is welded to the surfaces of the two panels 11, 21 and the first reinforcement member 30, so that the second reinforcement member 40 is fixed in the space between the panels 11, 21 and the first reinforcement member 30.

[0070] Figure 5 1 is a perspective view showing a rear vehicle body structure 1 and an anti-collision beam 4 located inside a vehicle door according to one form of the present invention, and shows that when the vehicle door ( Figure 7 The position of the anti-collision beam 4 installed on the inner side of the door when the door is closed. Figure 5 In the figure, the vehicle door is shown as transparent, so that the anti-collision beam 4 and the beam support bracket 5 installed on the inner side of the vehicle door can be seen.

[0071] In a typical vehicle, the door has a structure in which an inner door panel and an outer door panel are joined to each other. In a door having such a structure, an anti-collision beam 4 is installed in the door interior space between the inner door panel and the outer door panel. In this case, the anti-collision beam 4 can be mounted on a component that is subjected to an impact load during a side collision of the vehicle. Each of the opposite ends of the anti-collision beam 4 can be joined and fixed to the inner door panel via a beam support bracket 5.

[0072] In one form of the invention, the second reinforcement member 40 described above and the third reinforcement member 60 described later are located at the same phase position as the beam support bracket 5 located inboard of the beam support bracket 5 supporting the impact beam 4 inside the door.

[0073] That is, during a side collision of the vehicle, when the side collision load is applied to the impact beam 4 located on the inner side of the door through the door outer panel, the load transmitted to the impact beam 4 is applied to the door inner panel through the beam support bracket 5 located on each of the opposite ends of the impact beam 4. In this case, the second reinforcement member 40 is arranged immediately inward of the beam support bracket 5 in the transverse direction of the vehicle (in the vehicle inner direction) and is in the same phase position as the beam support bracket 5.

[0074] For reference, in the following description, another component arranged immediately inside one component in the lateral direction and at the same phase position as the one component may mean that two components located inside and outside the inside of the vehicle body structure, respectively, are arranged to at least partially overlap each other.

[0075] refer to Figure 5 , the beam supporting bracket 5 and the second reinforcement member 40 are arranged to at least partially overlap each other while being located at the outer side and the inner side, respectively.

[0076] As a result, the connection between the second reinforcement member 40 of the vehicle body structure and the door impact beam 4 can be strengthened, and the amount of overlap between the vehicle body structure 1 and the impact beam 4 with respect to the lateral load (side impact load) occurring during a side collision can be increased. The collision load transmitted to the beam support bracket 5 is transmitted to the second reinforcement member 40 and the third reinforcement member 60, which are installed immediately inward of the beam support bracket 5 in the lateral direction and in the same phase position as the beam support bracket 5. In this case, the second reinforcement member 40 and the third reinforcement member 60, which are located immediately inward of the beam support bracket 5 and in the same phase position as the beam support bracket 5, support the collision load transmitted by the beam support bracket 5.

[0077] like Figure 5 As shown by the dotted arrows, the lateral load is transmitted through the second reinforcement member 40, thereby increasing the lateral load dispersion and transmitting it to various paths of multi-directional load paths (see Figure 7 ), and can ensure and increase resistance to lateral collision loads.

[0078] Figure 6 1 is a perspective view showing important parts of a rear vehicle body structure 1 on the inner side of a vehicle body according to one form of the present invention. Figure 6 The third reinforcement member 60 , which is a plate-shaped member on the vehicle body inner side of the vehicle body structure 1 , is shown in an installed state.

[0079] As shown in the figure, the third reinforcement member 60 is installed on the inner side of the vehicle body structure 1. In particular, in one form of the present application, on the inner side of the vehicle body structure 1, the third reinforcement member 60 is arranged together with the second reinforcement member 40 to be located at the same phase position as the beam support bracket 5 immediately inside the beam support bracket 5 (which is located inside the vehicle door).

[0080] In this case, the third reinforcement member 60 is provided with a third reinforcement member bonding surface portion 61 formed on its periphery. The third reinforcement member bonding surface portion 61 as the periphery of the third reinforcement member 60 includes: a third bonding surface portion 61a formed to have an L surface shape and a fourth bonding surface portion 61b formed to have an H surface shape.

[0081] The third bonding surface portion 61a of the third reinforcement member bonding surface portion 61 of the third reinforcement member 60 is bonded and fixed to the inner surface of the quarter inner panel 21 (rigid body) forming the side surface of the vehicle body structure 1. Furthermore, in the third reinforcement member 60, the fourth bonding surface portion 61b of the third reinforcement member bonding surface portion 61 is bonded and fixed to the upper surface of the rear floor side member 50 as the rigid body.

[0082] Therefore, the third reinforcement member 60 is connected to the rear quarter inner panel 21 of the vehicle body structure 1 and the rear floor side member 50 , which is a rigid body, and disperses the lateral load applied to the vehicle body structure 1 during a side collision of the vehicle to various parts of the vehicle body structure 1 .

[0083] Finally, in the vehicle body structure 1 according to one form of the present invention, the second reinforcement member 40 and the third reinforcement member 60 are installed to be connected to multiple predetermined portions of the vehicle body structure, thereby further enhancing the distribution of the lateral load applied to the vehicle body structure during a vehicle side collision.

[0084] Furthermore, for the lateral load occurring during a side collision, the amount of overlap between the vehicle body structure 1 and the anti-collision beam 4 can be increased, and as shown in FIG. Figure 6 The dotted arrows in the middle indicate multi-directional load paths that can increase lateral loads.

[0085] As described above, the first reinforcement member 30 , the second reinforcement member 40 , and the third reinforcement member 60 are located immediately inside the beam support bracket 5 , thereby enhancing the dispersion performance of the lateral load transmitted through the beam support bracket 5 during a side collision.

[0086] Figure 7 It is along Figure 6The cross-section taken along line AA in FIG. 1 illustrates the secure connection between the vehicle body panels and the reinforcement members, as well as the multi-directional load paths for side impact loads. The dashed arrows indicate the transmission paths of the lateral loads applied to the vehicle body structure during a side impact, in a cross-section of a vehicle body structure 1 according to one form of the present invention.

[0087] refer to Figure 7 , the second reinforcement member 40 and the third reinforcement member 60 are arranged to at least partially overlap each other while being located at the outer side and the inner side, respectively.

[0088] Therefore, in a vehicle body structure 1 according to one form of the present invention, as Figure 7 As shown by the dashed arrows, multi-directional load paths are formed in the cross section of the vehicle body structure, that is, multi-directional paths for transmitting side collision loads, so that the distribution of lateral loads can be diversified.

[0089] Furthermore, as described above, in the vehicle body structure according to one form of the present invention, since the connections between vehicle body components are strengthened, the rigidity of the vehicle body frame, particularly the rigidity of the vehicle body frame against torsion and bending, can be improved.

[0090] Although various forms of the present invention have been described for illustrative purposes, the claims of the present invention are not limited to the forms described herein, and those skilled in the art will appreciate that various modifications, additions and deletions are possible without departing from the scope and spirit of the invention.

Claims

1. A rear body structure of a vehicle, comprising: a side member outer panel forming a lower portion of a vehicle body side, extending in the front-rear longitudinal direction of the vehicle, and including a joining surface portion on a rear end portion thereof; a rear quarter panel inner panel connected to the side member outer panel and forming a rear side surface of the vehicle body located rearward of the rear door; a first reinforcement member joined to the side sill outer panel and the quarter panel inner panel and configured to cover a joint portion between the side sill outer panel and the quarter panel inner panel; as well as a second reinforcing member located in a space defined between a rear end portion of the side sill outer panel, a lower end portion of the rear quarter inner panel, and the first reinforcing member; wherein the bonding surface portion protrudes rearward and is bonded to the surface of the rear side inner panel, The second reinforcement member includes a second reinforcement member bonding surface portion formed along a periphery of the second reinforcement member, and the second reinforcement member bonding surface portion is fixedly bonded to a surface of the side sill outer panel, a surface of the quarter inner panel, and a surface of the first reinforcement member.

2. The rear vehicle body structure of a vehicle according to claim 1, wherein: The binding surface portion comprises: a first bonding surface portion that contacts an upper surface of a lower end portion of the rear quarter inner panel; and A second bonding surface portion contacts a side surface of a lower end portion of the quarter inner panel. 3 . The rear body structure of a vehicle according to claim 1 , further comprising a third reinforcement member located inside the rear body structure.

4. The rear vehicle body structure of a vehicle according to claim 3, wherein: the third reinforcement member including a third reinforcement member combining surface portion formed along a periphery of the third reinforcement member, The third reinforcement member bonding surface portion is bonded to a surface of a vehicle body panel located on an inner side of the vehicle body, and includes: a third joining surface portion connected to the inner side of the quarter inner panel; and A fourth joining surface portion is fixedly joined to a rear floor side member mounted on each of opposite side end portions of the rear floor of the vehicle body.

5. The rear vehicle body structure of a vehicle according to claim 3, wherein: The second reinforcement member is located inside a beam support bracket that supports an end portion of an impact beam of the rear door.

6. The rear vehicle body structure of a vehicle according to claim 5, wherein: The second reinforcement member and the beam supporting bracket are arranged to at least partially overlap each other.

7. The rear vehicle body structure of a vehicle according to claim 5, wherein: The third reinforcement member is located inside the second reinforcement member.

8. The rear vehicle body structure of a vehicle according to claim 7, wherein: The second reinforcement member and the third reinforcement member are configured to at least partially overlap each other.

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