Rear structure of the vehicle body

Abstract

This invention utilizes a simple structure to effectively improve the tolerance of the rear side frame to load input caused by a vehicle collision. A rear structure of a vehicle body includes: a rear side frame extending outward in the vehicle width direction from the bottom plate portion at the rear of the vehicle body in the longitudinal direction; and a wheel arch disposed on the outer side of the rear side frame in the vehicle width direction, at least a portion of the outer wall portion of the rear side frame in the vehicle width direction being formed by the wheel arch. The rear structure of the vehicle body includes a partition member disposed within the cross-section of the rear side frame, one end of the partition member in the vehicle width direction engaging with the outer wall portion formed by the wheel arch and extending from the outer wall portion toward the front side of the vehicle body and in the vehicle width direction, and the other end in the vehicle width direction engaging with the inner wall portion of the rear side frame.

Description

Technical Field

[0001] This invention relates to a rear structure of a vehicle body. Background Technology

[0002] As a rear structure of the vehicle body, for example, Patent Document 1 discloses a configuration in which a load transfer member is included at a position behind the rear door opening and in front of the wheelhouse, thereby transferring the load caused by the impact of a vehicle collision entering the rear door to the side of the vehicle body using the load transfer member, thereby suppressing intrusion caused by the displacement of the rear door toward the inside of the passenger compartment.

[0003] [Existing technical documents]

[0004] [Patent Literature]

[0005] Patent Document 1: Japanese Patent Application Publication No. 2014-51115 Summary of the Invention

[0006] [The problem the invention aims to solve]

[0007] However, in recent years, the number of vehicles with large batteries has increased, leading to an increase in vehicle weight. Consequently, the load input to the vehicle body from side impacts (so-called side collisions) has also increased. If the load input to the vehicle body during a side collision is too large, in the conventional structure described in Patent Document 1, the load input to the rear frame increases, which may cause deformation of the rear frame and potentially fail to adequately suppress intrusion into the passenger compartment.

[0008] The present invention was made in view of the aforementioned problems and aims to provide a rear structure of a vehicle body that effectively improves the tolerance of the rear frame to load input caused by vehicle collisions by utilizing a simple structure, thereby effectively suppressing deformation of the rear of the vehicle body during side collisions. Thus, it improves traffic safety by means of the vehicle and suppresses the decline in traffic flow.

[0009] [Technical means to solve the problem]

[0010] To solve the aforementioned problem, the rear structure of the vehicle body of the present invention includes: a rear side frame 10 extending along the longitudinal direction of the vehicle body 1 on the outer side of the floor portion 2 at the rear of the vehicle body 1 in the vehicle width direction; and a wheel arch 50 disposed on the outer side of the rear side frame 10 in the vehicle width direction, at least a portion of the outer wall portion 12 of the rear side frame 10 in the vehicle width direction being formed by the wheel arch 50, the rear structure of the vehicle body including a partition member 80 disposed in the cross section of the rear side frame 10, one end of the partition member 80 in the vehicle width direction engaging with the outer wall portion 12 formed by the wheel arch 50, and extending from the outer wall portion 12 toward the front side of the vehicle body 1 and in the vehicle width direction, the other end in the vehicle width direction engaging with the inner wall portion 13 of the rear side frame 10.

[0011] According to the rear structure of the vehicle body of the present invention, the partition member extends from the outer wall of the rear frame forming part of the wheel arch toward the front side of the vehicle body and in the vehicle width direction. Therefore, in the event that a load is applied to the tire or the like in a side-impact collision, and the tire contacts the wheel arch, the load input to the wheel arch can be efficiently transferred to the inner wall of the rear frame. Consequently, the rigidity of the rear of the vehicle body is improved, and deformation of the rear (floor) of the vehicle body (deformation toward the inner side in the vehicle width direction, i.e., the interior side of the passenger compartment) during a side-impact collision can be more effectively suppressed.

[0012] Furthermore, the present invention may also include: crossbeams 30 and 40, which are connected to the rear frame 10 and extend inward in the vehicle width direction; and wheel arch support plate 90, which connects the connecting portion 91 provided on the upper surface 15 of the rear frame 10 to the wheel arch 50, and the partition member 80 is provided in a position parallel to the connecting portion 91 in the vertical direction.

[0013] According to the structure, the partition member is positioned parallel to the connection point of the wheel arch brace in the rear frame in the vertical direction. Thus, the load from a side impact input to the wheel arch is transferred to the crossbeam via the partition member. Therefore, the rigidity of the rear of the vehicle body is further improved, and deformation of the rear (floor) of the vehicle body (deformation towards the inside (cabin interior) in the vehicle width direction) during a side impact can be more effectively suppressed.

[0014] Furthermore, the present invention may also include: an intermediate member 95, which is joined to the upper side of the partition member 80 in the cross section of the rear frame 10, and the intermediate member 95 and the wheel arch support plate 90 are arranged in a vertically aligned position.

[0015] According to the structure, including an intermediate member engaged with the upper side of the partition member, the load caused by a side impact input to the wheel arch can be more efficiently transferred / distributed to the partition member. Therefore, the rigidity of the rear frame can be further improved, thus more effectively suppressing deformation of the rear frame.

[0016] Furthermore, in the present invention, the wheel cover 50 may be formed by a flange portion 52 forming the rear door opening portion 53 of the vehicle body 1 and a bulge portion 51 bulging outward from the flange portion 52 in the vehicle width direction, and the wheel cover corner support plate 90 is joined to the flange portion 52 and the bulge portion 51.

[0017] According to the structure described, the wheel arch gusset plate is joined to the flange portion and the bulge portion, thereby allowing either a load input from the side of the vehicle body to the wheel arch or a load input from the tire to the wheel arch to be transferred to the partition member via the wheel arch gusset plate. Therefore, deformation of the wheel arch and the rear frame toward the inward side (inside the passenger compartment) in the vehicle width direction can be more effectively suppressed.

[0018] Furthermore, in the present invention, the wheel arch support plate 90 and the intermediate member 95 may be joined by welding via the upper member 15 constituting the upper side wall of the rear frame 10, and the separator member 80 may be joined to the intermediate member 95 by means of adhesive.

[0019] According to the structure, the wheel arch gusset plate and the intermediate member are joined by welding via the upper member, and the partition member is joined to the intermediate member by means of adhesive. Thus, the load applied to the wheel arch during a collision from the rear of the vehicle body (rear collision) or a side collision can be efficiently transferred to the rear frame via the intermediate member.

[0020] Furthermore, in the present invention, the cross-sectional shape of the intermediate member 95 may be formed as a concave shape with an upward opening, and the separating member 80 may be joined to the lower surface of the intermediate member 95.

[0021] According to the structure, the cross-sectional shape of the intermediate member is a concave shape with an upward opening (a so-called cap-shaped cross-section), and a partition member is joined to its lower surface. Therefore, even if the partition member is angled, it can still be joined to the intermediate member. Thus, the arrangement angles of the partition member and the intermediate member can be set to match the load transfer path, thereby enabling more reliable load transfer using these partition members and the intermediate member.

[0022] Furthermore, in the present invention, the crossbeam 30 may be connected to a position in the rear frame 10 that is further forward than the partition member 80, and the end of the crossbeam 30 on the rear frame 10 side extends toward the partition member 80.

[0023] According to the structure, the rear frame side end of the crossbeam extends toward the partition member, thereby enabling the load input to the partition member to be smoothly transferred to the crossbeam, thus improving the rigidity of the rear frame.

[0024] Furthermore, the present invention may also include: a reinforcing member 60 disposed in the cross section of the rear frame 10 at a position further forward than the partition member 80, the inner end of the reinforcing member 60 in the vehicle width direction being joined to the partition member 80, and the upper end being joined to the wheel arch support plate 90 via the upper member 15 constituting the upper wall portion of the rear frame 10.

[0025] According to the structure, a reinforcing member is provided at a position further forward than the partition member. The reinforcing member is joined to the wheel arch gusset plate and the partition member. Thus, the load input from the wheel arch can be transmitted via the reinforcing member, thereby dispersing the input load. Therefore, the rigidity of the rear frame can be improved, thereby suppressing deformation of the rear frame.

[0026] Additionally, the symbols within the parentheses are reference numerals indicating the corresponding components in the embodiments described later, for reference only.

[0027] [The effects of the invention]

[0028] According to the rear structure of the vehicle body of the present invention, a rear structure of the vehicle body is provided that effectively improves the tolerance of the rear side frame to the load input caused by a collision with the vehicle by utilizing a simple structure, thereby effectively suppressing the deformation of the rear part of the vehicle body during a side collision, thereby improving the safety of traffic by means of the vehicle and suppressing the decline in traffic flow. Attached Figure Description

[0029] Figure 1 This is a schematic perspective view of the rear structure of a vehicle body to which an embodiment of the present invention is applied, specifically the floor portion of the rear of the vehicle body, viewed from above.

[0030] Figure 2 It is a rough plan view showing the floor section at the rear of the vehicle.

[0031] Figure 3 It is a three-dimensional view showing the rear wheel arch and the rear side frame.

[0032] Figure 4 It is a plan view showing the rear frame and a portion of its surroundings, and is Figure 2 A magnified view of part A.

[0033] Figure 5 It is a cross-sectional view of the rear frame, and it shows... Figure 4 A cross-sectional view of the BB direction.

[0034] Figure 6 It is a three-dimensional view showing the interior of the rear frame and the front end of the rear wheel arch.

[0035] [Explanation of Symbols]

[0036] 1: Body

[0037] 2: Base plate

[0038] 3: Rear bottom panel

[0039] 4: Side beam

[0040] 4b: Rear end

[0041] 10: Rear side frame

[0042] 12: Lateral wall

[0043] 13: Inner wall

[0044] 14: Bottom wall

[0045] 15: Up the wall

[0046] 17: Arm Mounting Section

[0047] 17a: convex part

[0048] 30: Front crossbeam (crossbeam)

[0049] 31: Front connecting part

[0050] 40: Rear crossbeam (crossbeam)

[0051] 41: Rear connecting part

[0052] 50: Rear wheel cover (wheel cover)

[0053] 50a: Front end

[0054] 50b: Inner surface

[0055] 50c: Upper end

[0056] 51: Drum section

[0057] 52: Flange portion

[0058] 52a: Top edge

[0059] 53: Rear door opening

[0060] 60: Reinforcing components

[0061] 61: Ontology Department

[0062] 62: Joining plate

[0063] 63: Joining plate

[0064] 64: Joining plate

[0065] 65: Joining plate

[0066] 66: Collar component

[0067] 70: Front partition component

[0068] 71: Ontology Department

[0069] 72: Joining plate

[0070] 73: Joining plate

[0071] 74: Joining plate

[0072] 75: Joining plate

[0073] 80: Rear partition member (partition member of the present invention)

[0074] 81: Ontology Department

[0075] 82: Joining plate

[0076] 83: Joining plate

[0077] 84: Joining plate

[0078] 85: Joining plate

[0079] 90: Wheel arch gusset plate

[0080] 90a: Upper end

[0081] 90b: Lower end

[0082] 91: Upper connecting part (the connecting part of the present invention)

[0083] 95: Intermediate components Detailed Implementation

[0084] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Furthermore, in the following description, "front" or "rear" refers to the forward direction (front side) or the reverse direction (rear side) of the vehicle body (vehicle). Moreover, "left" and "right" refer to the left and right of the vehicle width direction in the forward direction (front side) of the vehicle body (vehicle), respectively. Furthermore, "up" and "down" refer to the vertical direction (vertical direction) of the vehicle body (vehicle).

[0085] Figure 1 as well as Figure 2 This is a diagram showing the rear floor portion of a vehicle body according to an embodiment of the present invention. Figure 1 This is a rough three-dimensional view of the base plate from above. Figure 2These are schematic plan views of the floor section. As shown in these figures, the vehicle body 1 of this embodiment includes: a floor section 2, provided at the rear of the vehicle body 1; a pair of rear side frames 10, 10, extending along the longitudinal direction of the vehicle body 1 on the outer side of the floor section 2 in the vehicle width direction; a front crossbeam 30, connecting between the pair of rear side frames 10, 10 and extending inward in the vehicle width direction; a rear crossbeam 40, connecting between the pair of rear side frames 10, 10 at a position further rearward than the front crossbeam 30 and extending inward in the vehicle width direction; and a rear floor panel 3, forming the bottom surface of the floor section 2 between the pair of rear side frames 10, 10.

[0086] On the outer side of each of the two rear side frames 10, 10 in the vehicle width direction, there is a rear wheel cover 50 for accommodating the rear wheel (rear tire) (not shown). Figure 3 This is a perspective view (viewed from the front and inside in the vehicle width direction) showing the rear wheel arch and rear side frame. The rear wheel arch 50 includes: a bulge 51, which has a curved surface shape that covers the rear tire and bulges inward in the vehicle width direction; and a plate-shaped flange 52, which extends vertically outward from the outer side of the bulge 51. The upper edge 52a of the flange 52 forms the lower edge of the rear door opening 53 provided on the side of the vehicle body 1, and is inclined in a manner that gradually decreases from the rear to the front along the front portion of the bulge 51.

[0087] The front crossbeam 30 is connected to the side surface (inner surface) of the inner wall 13 of the rear side frame 10 via a front connecting portion (first connecting portion) 31 located further forward than the front end 50a of the rear wheel arch 50, thus connecting the left and right rear side frames 10 to each other in the vehicle width direction. Furthermore, the rear crossbeam 40 is connected to the side surface (inner surface) of the inner wall 13 of the rear side frame 10 via a rear connecting portion (second connecting portion) 41 located inside the rear wheel arch 50, and extends upward from the rear connecting portion 41 along the inner surface 50b (inner wall of the bulge 51) of the rear wheel arch 50, with both ends reaching the rear wheel arch 50, the upper end 50c of the rear wheel arch 50, and the upper end 50c of the rear wheel arch 50, respectively. Therefore, the rear crossbeam 40 connects the left and right rear side frames 10, 10 to each other, and the left and right rear wheel arches 50, 50 are also connected to each other. Moreover, the adjacent rear side frames 10 and rear wheel arches 50 in the vehicle width direction are also connected by the rear crossbeam 40. In addition, in the longitudinal direction of the vehicle body 1, the front connecting part 31 is located further forward than the rear connecting part 41.

[0088] Figure 4 It is a plan view showing the rear frame and a portion of its surroundings, and is Figure 2 A magnified view of part A. Figure 5 It is a cross-sectional view of the rear frame, and it shows... Figure 4A cross-sectional view of the BB direction. Furthermore, Figure 6 It is a three-dimensional view showing the interior of the rear frame and the front end of the rear wheel arch.

[0089] Furthermore, the left and right rear side frames 10, 10 and the rear wheel arches 50, 50 are symmetrical in shape and structure; therefore, in the following description, only one of the rear side frames 10 and the rear wheel arches 50 will be described. Also, for ease of explanation, some components may be omitted from the figures. In particular, Figure 4 In the middle section, the upper wall (upper component) 15 of the rear floor panel 3 or the rear side frame 10 described later, as well as the wheel arch brace 90, are omitted from the illustration. Figure 6 The rear bottom panel 3 and the upper wall 15 are omitted from the illustration.

[0090] like Figures 3 to 5 As shown, the rear frame 10 includes: an outer wall 12, forming an outer wall portion in the vehicle width direction; an inner wall 13, forming an inner wall portion in the vehicle width direction; a bottom wall 14, forming a bottom (bottom surface); and an upper wall (upper member) 15, forming an upper part (upper surface). The cross-section along the long side, viewed from the front-rear direction, is a closed cross-section with a generally rectangular shape (approximately U-shaped). Furthermore, the outer wall 12 of the rear frame 10, located further rearward than the front end 50a of the rear wheel arch 50, includes the inner surface 50b of the rear wheel arch 50 (the inner wall of the bulge 51), i.e., a curved portion. The outer wall 12 of the rear frame 10, located further forward than the front end 50a of the rear wheel arch 50, includes a side beam 4. The side beam 4 is a long strip-shaped member extending in the front of the rear wheel arch 50, causing both sides of the vehicle body 1 to extend in the front-rear direction. Its rear end 4b is positioned opposite the front end 50a of the rear wheel arch 50. Therefore, the rear end 4b of the side beam 4 and its vicinity extend in the front-rear direction on the outer side of the rear frame 10.

[0091] Moreover, such as Figure 4 As shown, the outer sidewall 12 of the rear frame 10 extends in a generally straight line along the longitudinal direction as part of the side beam 4, further forward than the front end 50a (rear end 4b of the side beam 4) of the rear wheel arch 50. On the other hand, further rearward than the front end 50a of the rear wheel arch 50, it gradually slopes towards the rearward side along the inner surface 50b of the rear wheel arch 50, becoming inward in the vehicle width direction. On the other hand, the inner sidewall 13 of the rear frame 10 slopes from a position further forward than the front connecting portion 31 connected to the front crossbeam 30 to the rear connecting portion 41 connected to the rear crossbeam 40, gradually becoming inward in the vehicle width direction from the front to the rear. Thus, the rear crossbeam 40 is formed from the front connecting portion 31 to the rear connecting portion 41 in a way that gradually widens in the vehicle width direction (width dimension of the cross section) from the front to the rear connecting portion 41.

[0092] Moreover, such as Figure 4 as well as Figure 5 As shown, an arm mounting portion 17 is provided on the rear frame 10 for mounting a trailing arm (not shown), which is a component of the rear suspension. The arm mounting portion 17 has a protrusion 17a that is provided on the bottom wall (bottom surface) 14 of the rear frame 10 and bulges upward, and a recess 17b that is recessed upward on its lower surface side (lower surface of the rear frame 10). The components of the trailing arm are connected to the recess 17b. Therefore, the arm mounting portion 17 is formed as a protruding protrusion in the cross-section of the rear frame 10. The arm mounting portion 17 is positioned in the rear frame 10 in the vehicle width direction alongside the front end 50a of the rear wheel arch 50 and the rear end 4b of the side beam 4, and is positioned alongside the front connecting portion 31 that connects to the front crossbeam 30.

[0093] Furthermore, a reinforcing member 60 is provided in the cross-section of the rear frame 10 to reinforce the arm mounting portion 17. The reinforcing member 60 is a metal plate-shaped member extending in the vehicle width direction within the cross-section of the rear frame 10, and includes: a generally flat body portion 61 extending in the vehicle width direction from the outer side wall 12 to the inner side wall 13 of the rear frame 10; and tongue-shaped connecting pieces 62 to 65, respectively connected to the left and right end edges and the lower and upper end edges of the body portion 61. Figure 5 As shown, the reinforcing member 60 is positioned directly above the arm mounting portion 17 in the cross-section of the rear frame 10, extending across the arm mounting portion 17 in the vehicle width direction (left-right direction). The lower end edge of the body portion 61 of the reinforcing member 60 abuts against the upper surface of the arm mounting portion 17 (protrusion 17a).

[0094] Furthermore, the inner connecting piece 63 of the reinforcing member 60 is welded to the inner wall 13 of the rear frame 10 and the inner connecting piece 83 of the rear partition member 80 (described later), while the outer connecting piece 62 is welded to the inner surface of the outer wall 12 of the rear frame 10, i.e., the side beam 4. Moreover, the upper connecting piece 65 of the reinforcing member 60 is bonded to the intermediate member 95 (described later) and the upper wall (upper member) 15 of the rear frame 10 by means of adhesive. On the other hand, the lower connecting piece 64 of the reinforcing member 60 is connected to the bottom wall 14 of the rear frame 10 via collar members 66 on both sides (left and right sides) of the arm mounting portion 17 in the vehicle width direction. The collar member 66 is a long, cylindrical member extending vertically along its long side; its upper end is welded to the lower connecting piece 64 of the reinforcing member 60, and its lower end is welded to the bottom wall 14 of the rear frame 10. Furthermore, ideally, the upper end of the collar member 66 is welded to the mating piece 64 of the reinforcing member 60 by projection welding.

[0095] Thus, the outer end of the reinforcing member 60 located in the cross section of the rear frame 10 in the vehicle width direction is joined (welded) to the side beam 4, and the upper end is joined (bonded) to the upper wall (upper member) 15 of the rear frame 10.

[0096] Furthermore, the reinforcing member 60 is positioned in the longitudinal direction of the rear frame 10 between the front connecting part 31 that connects to the front crossbeam 30 and the rear connecting part 41 that connects to the rear crossbeam 40.

[0097] A front partition member (first partition member) 70 is provided in the cross-section of the rear frame 10, positioned forward of the reinforcing member 60 and the arm mounting portion 17. The front partition member 70 is a metal plate-shaped member extending in the vehicle width direction within the cross-section of the rear frame 10, and includes: a generally flat body portion 71 extending from the outer side wall 12 to the inner side wall 13 of the rear frame 10 in the vehicle width direction; and tongue-shaped connecting pieces 72 to 75, respectively connected to the left and right end edges and the upper and lower end edges of the body portion 71. The front partition member 70 is positioned in the cross-section of the rear frame 10, parallel to the front connecting portion 31 in the vehicle width direction.

[0098] Furthermore, the inner connecting piece 73 of the front partition member 70 is welded to the inner wall 13 of the rear frame 10 and the end of the front crossbeam 30 in the front connecting portion 31. That is, the front partition member 70 is joined to the front crossbeam 30 via the inner wall 13 of the rear frame 10. Moreover, the outer connecting piece 72 of the front partition member 70 is welded to the inner surface of the outer wall 12 of the rear frame 10, i.e., the side beam 4. Furthermore, the upper connecting piece 75 of the front partition member 70 is welded to the upper wall (upper member) 15 of the rear frame 10, and the lower connecting piece 74 is welded to the bottom wall 14.

[0099] Furthermore, a rearward partition member (second partition member) 80 is provided in the cross-section of the rear frame 10, further rearward than the reinforcing member 60 and the arm mounting portion 17. The rearward partition member 80 is a metal plate-shaped member extending in the vehicle width direction within the cross-section of the rear frame 10, extending obliquely towards the front of the vehicle body and inward in the vehicle width direction. The rearward partition member 80 includes: a generally flat body portion 81 extending obliquely in the vehicle width direction from the outer side wall 12 of the rear frame 10, i.e., the inner surface 50b of the rear wheel arch 50, to the inner side wall 13; and tongue-shaped connecting pieces 82 to 85, respectively connected to the left and right end edges and the upper and lower end edges of the body portion 81.

[0100] Furthermore, the inner connecting piece 83 of the rear partition member 80 is welded to the inner wall 13 of the rear frame 10 and the inner connecting piece 63 of the reinforcing member 60. That is, the inner end of the rear partition member 80 in the vehicle width direction is joined to the reinforcing member 60. Moreover, the outer connecting piece 82 of the rear partition member 80 is welded to the inner surface 50b of the outer wall 12 of the rear frame 10, i.e., the rear wheel arch 50. Furthermore, the upper connecting piece 85 of the rear partition member 80 is joined to the intermediate member 95 (described later) by adhesive bonding, and the lower connecting piece 84 is welded to the bottom wall 14.

[0101] Moreover, such as Figure 2 as well as Figure 6 As shown, a wheel arch gusset plate 90 is provided, extending from the front end portion 50a of the rear wheel arch 50 toward the upper wall 15 (upper surface) of the rear frame 10 and connecting them. The wheel arch gusset plate 90 is a metal component provided such that it extends from the front end portion 50a of the rear wheel arch 50 toward the inward and downward side in the vehicle width direction and covers the upper wall 15 of the rear frame 10. The upper end portion 90a of the wheel arch gusset plate 90 is welded to the vicinity of the front end portion 50a of the rear wheel arch 50 (bulge 51) and the upper edge 52a of the flange portion 52. Furthermore, Figure 2 The diagram only shows one of the left and right wheel arch support plates 90 and 90.

[0102] Furthermore, an intermediate member 95 is provided, which is joined (bonded) to the upper side of the reinforcing member 60 and the rear partition member 80 within the cross-section of the rear frame 10. The lower end 90b of the wheel arch gusset plate 90 is joined to the intermediate member 95 via the upper wall (upper member) 15 of the rear frame 10. Therefore, the wheel arch gusset plate 90 is joined to the rear partition member 80 and the reinforcing member 60 within the cross-section of the rear frame 10 via the intermediate member 95. Thus, the wheel arch gusset plate 90 and the intermediate member 95 are joined by welding via the cover portion, i.e., the upper wall (upper member) 15 of the rear frame 10.

[0103] The intermediate member 95 is a metal plate-shaped member, and its cross-sectional shape, viewed from the vehicle width direction, is a concave shape opening upwards, that is, a roughly U-shaped cross-section convex downwards. Furthermore, a connecting piece 85 on the upper side of the rear partition member 80 is joined to the lower surface of the cross-sectional portion of the intermediate member 95. The joining portion of the lower surface of the intermediate member 95 and the connecting piece of the rear partition member 80 is joined by means of an adhesive.

[0104] The rear partition member 80, the intermediate member 95, and the reinforcing member 60 are positioned directly below the upper connecting part (third connecting part) 91 of the wheel arch gusset plate 90, which is connected to the rear frame 10. These rear partition members 80, the intermediate member 95, and the reinforcing member 60 are positioned in the vertical direction alongside the lower end 90b of the wheel arch gusset plate 90 and the upper connecting part 91.

[0105] Moreover, such as Figure 4 As shown, the front connecting portion 31 of the rear frame 10, which connects to the front crossbeam 30, is positioned further forward than the rear partition member 80 within the rear frame 10. Furthermore, the end of the front crossbeam 30 connected to the front connecting portion 31 on the rear frame 10 side extends towards the rear of the vehicle body 1 (towards the rear partition member 80) (see reference). Figure 4 (Part C). In other words, the end of the front crossbeam 30 is inclined towards the outside in the vehicle width direction and gradually becomes the rear side, and this part is inclinedly connected to the inner wall 13 of the rear frame 10. Thus, the end of the front crossbeam 30 on the rear frame 10 side extends towards the rear side of the vehicle body 1, that is, towards the rear partition member 80.

[0106] As described above, the rear structure of the vehicle body in this embodiment includes: a rear side frame 10 extending along the longitudinal direction of the vehicle body 1 on the outer side of the floor portion 2 at the rear of the vehicle body 1 in the vehicle width direction; and a rear wheel arch 50 disposed on the outer side of the rear side frame 10 in the vehicle width direction, a portion of the outer side wall 12 of the rear side frame 10 being formed by the rear wheel arch 50. Furthermore, the rear structure of the vehicle body includes a rear side partition member (partition member of the present invention) 80 disposed within the cross-section of the rear side frame 10, the outer end of the rear side partition member 80 in the vehicle width direction engaging with the inner surface 50b of the rear wheel arch 50, and extending from the inner surface 50b of the rear wheel arch 50 toward the front side of the vehicle body 1 and in the vehicle width direction, the inner end in the vehicle width direction engaging with the inner side wall 13 of the rear side frame 10.

[0107] According to the rear structure of the vehicle body in this embodiment, the rear partition member 80 extends from the inner surface 50b of the rear wheel arch 50 toward the front side of the vehicle body 1 and in the vehicle width direction. Therefore, when a load of a side impact (side collision) is applied to the tires, etc., if the tires come into contact with the rear wheel arch 50, the load input to the rear wheel arch 50 can be effectively transferred to the inner wall 13 of the rear frame 10. As a result, the rigidity of the rear of the vehicle body 1 is improved, and the deformation of the rear of the vehicle body 1 (floor plate 2) during a side impact (deformation toward the inner side (inner side of the passenger compartment) in the vehicle width direction) can be suppressed more effectively.

[0108] Furthermore, this embodiment includes: a front crossbeam 30 and a rear crossbeam 40, which are connected to the rear frame 10 and extend inward in the vehicle width direction; and a wheel arch support plate 90, which connects the upper connecting portion (third connecting portion: the connecting portion of the present invention) 91 provided on the upper wall (upper surface) 15 of the rear frame 10 to the rear wheel arch 50. Additionally, the rear partition member 80 is positioned parallel to the upper connecting portion 91 in the vertical direction.

[0109] According to the structure, the rear partition member 80 is positioned parallel to the upper connecting portion 91 of the connecting wheel arch gusset plate 90 in the rear frame 10 in the vertical direction. Thus, the load from a side impact input to the rear wheel arch 50 is transmitted to the front crossbeam 30 and the rear crossbeam 40 via the rear partition member 80. Therefore, the rigidity of the rear of the vehicle body 1 is further improved, and deformation of the rear (floor portion 2) of the vehicle body 1 during a side impact (deformation towards the inner side (inner side of the passenger compartment) in the vehicle width direction) can be suppressed more effectively.

[0110] Furthermore, this embodiment includes: an intermediate member 95, which is joined to the upper side of the rear partition member 80 in the cross section of the rear frame 10, and the intermediate member 95 and the wheel arch support plate 90 are arranged in a vertically aligned position.

[0111] According to the structure, including the intermediate member 95 engaged with the upper side of the rear partition member 80, the load caused by a side impact input to the rear wheel arch 50 can be more efficiently transferred / distributed to the rear partition member 80. Therefore, the rigidity of the rear frame 10 can be further improved, thus more effectively suppressing the deformation of the rear frame 10.

[0112] Furthermore, in this embodiment, the rear wheel arch 50 is formed by a flange portion 52 forming the rear door opening portion 53 of the vehicle body 1 and a bulge portion 51 bulging inward from the flange portion 52 in the vehicle width direction, and the wheel arch support plate 90 is joined to the flange portion 52 and the bulge portion 51.

[0113] According to the structure, the wheel arch gusset plate 90 is engaged with the flange portion 52 and the bulge portion 51, thereby allowing either the load input from the side of the vehicle body 1 to the rear wheel arch 50 or the load input from the tire to the rear wheel arch 50 to be transmitted to the rear partition member 80 via the wheel arch gusset plate 90. Therefore, deformation of the rear wheel arch 50 and the rear frame 10 toward the inward side (inside the passenger compartment) in the vehicle width direction can be more effectively suppressed.

[0114] Furthermore, in this embodiment, the wheel arch support plate 90 and the intermediate member 95 are joined by welding via the upper wall (upper member) 15 of the rear frame 10, and the rear partition member 80 is joined to the intermediate member 95 by means of adhesive.

[0115] According to the structure, the wheel arch gusset plate 90 and the intermediate member 95 are joined by welding via the upper wall (upper member) 15, and the rear partition member 80 is joined to the intermediate member 95 by means of adhesive. Thus, the load applied to the rear wheel arch 50 in the event of a rear-end collision (rear-end collision) or a side collision from the vehicle body 1 can be efficiently transferred to the rear frame 10 via the intermediate member 95.

[0116] Furthermore, in this embodiment, the cross-sectional shape of the intermediate member 95 is formed as a concave shape with an upward opening, and the rear partition member 80 is joined to the lower surface of the intermediate member 95.

[0117] According to the structure, the cross-sectional shape of the intermediate member 95 is a concave shape with an upward opening (a so-called cap-shaped cross-section), and the rear partition member 80 is joined to its lower surface. Therefore, even if the rear partition member 80 is angled, it can still engage with the intermediate member 95. Thus, the arrangement angle of the rear partition member 80 and the intermediate member 95 can be set to match the load transfer path, thereby enabling more reliable load transfer via these rear partition members 80 and the intermediate member 95.

[0118] Furthermore, in this embodiment, the front crossbeam 30 is connected to a position in the rear frame 10 that is further forward than the rear partition member 80, and the end of the front crossbeam 30 on the rear frame 10 side extends toward the rear partition member 80.

[0119] According to the structure, the end of the front crossbeam 30 on the rear frame 10 side extends toward the rear partition member 80, thereby enabling the load input to the rear partition member 80 to be smoothly transferred to the front crossbeam 30, thereby improving the rigidity of the rear frame 10.

[0120] Furthermore, this embodiment includes a reinforcing member 60, which is located in the cross-section of the rear frame 10 at a position further forward than the rear partition member 80. The inner end of the reinforcing member 60 in the vehicle width direction is joined to the rear partition member 80, and the upper end is joined to the wheel arch support plate 90 via the upper wall (upper member) 15 of the rear frame 10.

[0121] According to the structure, a reinforcing member 60 is provided at a position further forward than the rear partition member 80. The reinforcing member 60 is joined to the wheel arch gusset plate 90 and the rear partition member 80. Thus, the load input from the rear wheel arch 50 can be transmitted via the reinforcing member 60, thereby dispersing the input load. Therefore, the rigidity of the rear frame 10 can be improved, thereby suppressing deformation of the rear frame 10.

[0122] The embodiments of the present invention have been described above, but the present invention is not limited to the described embodiments, and various modifications can be made within the scope of the technical concept described in the claims, specification and drawings.

Claims

1. A rear structure of a vehicle body, characterized in that, include: The rear frame extends along the front-rear direction of the vehicle body on the outer side of the floor at the rear of the vehicle body in the width direction. as well as Wheel covers, configured on the outer side of the rear frame in the vehicle width direction. At least a portion of the outer wall of the rear frame in the vehicle width direction is formed by the wheel arch. The rear structure of the vehicle body includes a partition member disposed within the cross-section of the rear side frame. One end of the partition member in the vehicle width direction is directly engaged with the outer wall portion formed by the wheel arch, and extends from the outer wall portion toward the front side of the vehicle body and the inner side in the vehicle width direction. The other end in the vehicle width direction is engaged with the inner wall portion of the rear frame, and the other end of the partition member is closer to the front side of the vehicle body than the first end.

2. The rear structure of the vehicle body according to claim 1, characterized in that, include: A crossbeam, connected to the rear frame, extends inward in the vehicle width direction; as well as Wheel arch gussets connect the connecting portion located on the upper surface of the rear frame to the wheel arch. The separating member is positioned parallel to the connecting portion in the vertical direction.

3. The rear structure of the vehicle body according to claim 2, characterized in that, include: The intermediate member is joined to the upper side of the partition member within the cross-section of the rear frame. The intermediate component and the wheel arch gusset plate are arranged in a vertically aligned manner.

4. The rear structure of the vehicle body according to claim 3, characterized in that, The wheel arch is formed by a flange portion that forms the rear door opening of the vehicle body and a bulge portion that bulges inward from the flange portion in the vehicle width direction. The wheel arch support plate is engaged with the flange portion and the bulge portion.

5. The rear structure of the vehicle body according to claim 4, characterized in that, The wheel arch gusset plate and the intermediate member are joined by welding via an upper member that forms the upper wall portion of the rear frame. The separating member is bonded to the intermediate member by means of an adhesive.

6. The rear structure of the vehicle body according to claim 5, characterized in that, The cross-sectional shape of the intermediate component is formed as a concave shape with an upward opening. The separating member is engaged with the lower surface of the intermediate member.

7. The rear structure of the vehicle body according to claim 2, characterized in that, The crossbeam is connected to the rear frame at a position further forward than the partition member. The rear frame side end of the crossbeam extends toward the partition member.

8. The rear structure of the vehicle body according to claim 6, characterized in that, include: The reinforcing member is located in the cross-section of the rear frame at a position further forward than the partition member. The inner end of the reinforcing member in the vehicle width direction is engaged with the partition member, and the upper end is engaged with the wheel arch brace via an upper member that forms the upper wall portion of the rear frame.

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