JP7165628B2 - rear body structure - Google Patents

Description

The present invention relates to a vehicle body rear structure.

As a vehicle rear structure, rear side frames extending substantially along the longitudinal direction of the vehicle body are arranged on both left and right sides of the vehicle, and rear wheel houses are arranged on the outside of each rear side frame in the vehicle width direction to cover the outside of the rear wheels. (See Patent Document 1, for example).

In the vehicle body rear structure described in Patent Document 1, a damper housing is integrally provided at substantially the center in the front-rear direction of the rear wheel house to cover the inner side and the upper side in the vehicle width direction of a rear damper for suspending the rear wheels. A damper base that supports the upper portion of the rear damper is integrally attached to the upper wall of the damper housing. The left and right rear side frames are connected to each other by a rear cross member at a position on the vehicle rear side of the damper housing. Connecting members are attached to both end portions of the rear cross member so as to form closed cross-sectional portions connecting the rear cross member and the left and right rear quarter pillars. A connecting member that connects the damper base to the connecting member that forms the closed cross section is connected to the rear portion of each damper base. Therefore, the vertical load input from the rear damper to the damper base is supported by the rear side frame and the rear quarter pillar via the connecting member.

JP 2017-124687 A

In the vehicle body rear structure described in Patent Document 1, the rear portion of the damper base and the connection member are connected by a connection member that extends obliquely downward from the rear portion of the damper base. Therefore, when a vertical load is input from the rear damper to the damper base, a bending component force acts on the connecting member, making it difficult to efficiently transmit the input load to a highly rigid portion such as the rear side frame. Therefore, when adopting the vehicle body rear structure described in Patent Document 1, it was necessary to add a reinforcing member.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a vehicle body rear portion structure in which a vertical load input from a rear damper to a damper base can be supported by a rear side frame with high rigidity.

In order to solve the above problems, the vehicle body rear portion structure according to the present invention employs the following configuration.
That is, the vehicle body rear structure according to one invention of the present application includes rear side frames (for example, the rear side frames 17 of the embodiment) extending substantially along the vehicle front-rear direction on both left and right sides of the vehicle, and vehicle width direction outer sides of the rear side frames. a damper housing (for example, the damper housing 19 of the embodiment) that rises upward from the edge of the rear wheel suspension and covers the vehicle width direction inner side and upper side of the rear damper for suspension of the rear wheel; A damper base (for example, the damper base 20 of the embodiment) that supports the upper part, a floor panel (for example, the rear floor panel 9 of the embodiment) whose edge on the outside in the vehicle width direction is coupled to the rear side frame, and the damper base a housing reinforcing member (e.g., the housing reinforcing member 21 of the embodiment) that is connected to the inner side of the damper housing in the vehicle width direction so as to reinforce the damper housing so as to connect to the inner edge portion in the vehicle width direction of the housing reinforcing member; and a gusset (for example, the gusset 22 of the embodiment) connecting the lower edge of the housing to the rear side frame. The gusset extends substantially along the vertical direction, and the gusset is an upper fastening portion (for example, The upper fastening portion 22a of the embodiment) and the lower fastening portion (for example, the lower fastening portion of the embodiment) that is bolted to the overlapping portion (for example, the overlapping portion 31 of the embodiment) of the floor panel and the rear side frame. A side wall of the damper housing (e.g., side wall 19s in the embodiment), which has a portion 22b) and is adjacent to the inner end of the damper base in the vehicle width direction, extends inward in the vehicle width direction from below toward the upper end. and the gusset stands substantially vertically upward from the overlapped portion of the floor panel and the rear side frame toward the upper end of the side wall .

With the above configuration, the gusset rigidly connects the lower edge of the housing reinforcing member and the rear side frame. A vertical load input from the rear damper to the damper base is supported by the rear side frame via the housing reinforcing member and the gusset.
In addition, since the gusset is bolted to the front and rear surfaces in addition to the side surface of the housing reinforcing member at the upper fastening portion, the vertical load input from the rear damper to the damper base is supported by the rear side frame with high rigidity. be able to. In addition, since the lower fastening part of the gusset is bolted to the overlapped part of the floor panel and rear side frame, which has a thick total thickness, the load input from the rear damper to the damper base is transferred to the highly rigid part of the rear side frame. It can be stably accepted.
In addition, a sealer (filler) is usually applied to the boundary of the overlapped portion of the floor panel and the rear side frame to prevent water from entering, but the lower edge of the gusset is bolted at the lower fastening portion. Since it is fastened and fixed to the overlapped portion, the attachment of the gusset does not impair the waterproofness of the sealer.
Further, in this case, since the side wall of the damper housing extends from the lower side toward the upper end while being inclined inward in the vehicle width direction, it is possible to secure a wide upper space in the damper housing. Therefore, the degree of freedom in layout of the suspension components in the damper housing is increased. Further, since the gusset stands vertically upward from the overlapped portion of the floor panel and the rear side frame, the damper base and the rear side frame can be connected in the shortest distance. Therefore, the vertical load input from the rear damper to the damper base can be more rigidly supported by the rear side frames.

The gusset may have a reinforcing bead (for example, the reinforcing bead 33 of the embodiment) extending substantially along the vertical direction.

In this case, the cross-sectional rigidity of the gusset increases in the vertical direction, making it possible to more rigidly transmit the load from the housing reinforcing member to the rear side frame.

The rear side frame has joint flanges (for example, joint flanges 17Au and 17Al in the embodiment) at both ends of a substantially U-shaped cross section (for example, a substantially U-shaped cross section 17Aa in the embodiment) that opens in one side in the vehicle width direction. A frame body (for example, the frame body 17A of the embodiment) extending therefrom, and a closing plate (for example, the an outer plate 17B of the embodiment), and a partition wall member (for example, the partition members 43A and 43B of the embodiment) that reinforces the closed cross section surrounded by the frame body and the closing plate, and the partition member A partition wall main body portion (for example, the partition wall main body portion 45a of the embodiment) extending in the cross section so as to traverse the closed cross section; A first plug-in flange (for example, the first plug-in flange 45c of the embodiment) inserted between the closing plates and connected to the partition main body to connect the other joining flange of the frame main body and the closing plate. A second insertion flange inserted between the plates (for example, the second insertion flange 45d of the embodiment) is connected to the partition main body and joined to the upper wall of the substantially U-shaped cross section. A first folded flange (for example, the first folded flange 45e in the embodiment) and a second folded flange (for example, the and a third folded flange (for example, the third folded flange 45g of the embodiment) connected to the bulkhead main body and joined to the lower wall of the substantially U-shaped cross section. and a bolt for fastening the lower fastening portion of the gusset to the rear side frame (for example, the bolt 32 of the embodiment), or a weld nut to which the bolt is fastened. (For example, the weld nut 46 of the embodiment) may be fixed.

In this case, the partition member reinforces the closed cross section within the closed cross section of the rear side frame, and fastens and supports the lower fastening portion of the gusset at the first folded flange joined to the upper wall of the frame body. can be done. Therefore, when this configuration is adopted, the rigidity of the closed cross section of the rear side frame can be increased, and the rigidity of the connecting portion of the lower fastening portion of the gusset can be increased.

A welding groove (for example, the welding groove 38 of the embodiment) for fixing the seat anchor (for example, the seat anchor 40 of the embodiment) by welding may be provided on the upper surface of the damper base.

In this case, the seat anchor can be welded and fixed to the weld groove, and the weld groove can increase the rigidity of the damper base.

The welding grooves are provided in pairs on the vehicle front side and the vehicle rear side on the upper surface of the damper base, and the damper base, including the welding grooves, is formed in a symmetrical shape in the vehicle front-rear direction. can be

In this case, it becomes possible to share one specification of the damper base between the left side and the right side of the vehicle. Therefore, when this configuration is employed, there is no need to separately manufacture damper bases for the left side and the right side of the vehicle, making it possible to reduce the product cost.

The vehicle body rear structure further includes an upper reinforcing member (e.g., the upper reinforcing member 25 of the embodiment) extending upward along the vehicle body side from a position connected to the outer edge of the damper base in the vehicle width direction. The member and the housing reinforcing member may be joined to the damper housing in the vicinity of the damper base.

In this case, the vertical load applied from the rear damper to the damper base can be efficiently transmitted to the upper and lower reinforcing members of the damper base and the housing reinforcing member. Therefore, when this configuration is adopted, the support rigidity of the damper base can be further increased.

The vehicle body rear structure extends obliquely toward the front of the vehicle body from below toward the upper end on the rear side of the vehicle body, and the upper end is connected to the roof cross member (for example, the roof cross member 12 of the embodiment) at the rear end of the roof. An inclined rear pillar (for example, the rear pillar 27 of the embodiment) may be further provided, and the upper reinforcing member may be coupled to the inclined rear pillar.

In this case, since the upper reinforcing member is connected to the inclined rear pillar, a large connecting area between the upper reinforcing member and the rear pillar can be secured. Therefore, the load transmitted from the rear damper to the upper reinforcing member via the damper base can be efficiently transmitted to the roof cross member at the rear end of the roof via the rear pillar.

A partition member (for example, the partition members 43A and 43B of the embodiment) that reinforces the cross section of the rear side frame is built in a portion of the rear side frame to which the lower fastening portion of the gusset is connected. A sub-frame (for example, the sub-frame 47 of the embodiment) that is laid over the left and right rear side frames may be coupled to the vicinity of the lower portion of the frame where the partition is built.

In this case, the subframe and roof cross member together with left and right rear side frames, gussets, housing reinforcing members, damper bases, upper reinforcing members, rear pillars, etc., constitute the first annular frame at the rear of the vehicle body. Therefore, when this configuration is adopted, the rigidity of the entire rear portion of the vehicle body is increased.

The rear pillars on the right and left sides of the vehicle body have their lower ends extending to positions rearward of the floor panel, and are connected to each other by lower cross members (for example, the rear panel cross member 13 and the rear panel 14 of the embodiment). can be

In this case, the lower cross member, together with the left and right rear pillars and the roof cross member, constitutes the second annular frame of the rear portion of the vehicle body. The roof cross member is shared by the first annular frame and the second annular frame as a common lateral member on the upper side. When this configuration is adopted, the rigidity of the entire rear portion of the vehicle body is increased.

The rear side frame has joint flanges (for example, joint flanges 17Au and 17Al in the embodiment) at both ends of a substantially U-shaped cross section (for example, a substantially U-shaped cross section 17Aa in the embodiment) that opens in one side in the vehicle width direction. A frame body (for example, the frame body 17A of the embodiment) extending therefrom, and a closing plate (for example, the The damper housing includes a side wall (for example, a side wall 19s in the embodiment) that covers the inner side of the rear damper in the vehicle width direction, and a side wall extending outward from the front end of the side wall in the vehicle width direction. and a rear wall (for example, the rear wall 19r of the embodiment) extending outward in the vehicle width direction from the rear end of the side wall. A lower edge portion of the side wall of the damper housing is sandwiched between a joint portion between the joint flange on the upper side of the frame main body and the closing plate, and the lower end of the front wall of the damper housing or the rear wall of the damper housing. A support bracket (for example, the support bracket 50 of the embodiment) may be connected between the lower end and the outer surface of the closure plate.

In this case, the lower edge of the side wall of the damper housing is held between the frame main body of the rear side frame and the closing plate, so that it is stably supported by the rear side frame. In addition, since the lower end of the front wall extending outward in the vehicle width direction of the damper housing or the lower end of the rear wall is connected to the outer surface of the closing plate by the support bracket, the rigidity of the damper housing is efficiently increased by the support bracket. can be enhanced.

A vehicle body rear structure according to another invention of the present application includes rear side frames (for example, the rear side frames 17 of the embodiment) that extend substantially along the vehicle front-rear direction on both left and right sides of a vehicle, and edges of the rear side frames on the vehicle width direction outer side. a damper housing (e.g., damper housing 19 of the embodiment) that rises upward from the portion and covers the vehicle width direction inner side and upper side of the rear damper for suspension of the rear wheel; A damper base (for example, the damper base 20 of the embodiment) that supports the vehicle, a floor panel (for example, the rear floor panel 9 of the embodiment) whose outer edge in the vehicle width direction is coupled to the rear side frame, and the damper base of the vehicle. a housing reinforcing member (e.g., housing reinforcing member 21 of the embodiment) that is coupled to the vehicle width direction inner side of the damper housing to reinforce the damper housing so as to continue to the width direction inner edge portion; A gusset (for example, the gusset 22 of the embodiment) connecting the edge and the rear side frame is provided, and the housing reinforcing member has a substantially U-shaped cross section whose center in the front-rear direction projects inward in the vehicle width direction. and the gusset is an upper fastener bolted to the lower side surface of the housing stiffening member and/or the lower front and rear surfaces of the housing stiffening member (e.g., the gusset of the embodiment). upper fastening portion 22a) and a lower fastening portion (for example, the lower fastening portion 22b in the embodiment) bolted to the overlapping portion (for example, the overlapping portion 31 in the embodiment) of the floor panel and the rear side frame ), and further comprising a rear inside panel (for example, the rear inside panel 24 of the embodiment) extending so as to cover a vehicle body side portion at a vehicle width direction outer position of the damper base, the vehicle of the damper base The widthwise outer edge is characterized by being welded to the horizontal surface of the rear inside panel (for example, the horizontal surface 24c in the embodiment).

In this case, the load acting on the damper base from the rear damper in a substantially horizontal direction can be received as a shear load at the welded portion between the damper base and the rear inside panel. Therefore, when this configuration is adopted, it is possible to increase the support rigidity of the damper base in the substantially horizontal direction.

In the present invention, the upper fastening portion of the gusset is bolted on two or three surfaces to the lower edge of the housing reinforcing member having a substantially U-shaped cross section connected to the damper base, and the lower fastening portion of the gusset is combined. It is bolted to the overlapping part of the thick floor panel and rear side frame. Therefore, when the present invention is employed, the vertical load input from the rear damper to the damper base can be supported by the rear side frames with high rigidity.

FIG. 2 is a rear view of the vehicle of the embodiment with some parts removed; FIG. 2 is a bottom view of the rear portion of the vehicle of the embodiment; Sectional drawing which follows the III-III line of FIG. The IV arrow view of FIG. 2 which removed some components. FIG. 4 is a perspective view of the V section of FIG. 3; FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 5; FIG. 5 is a perspective view of the VII section of FIG. 4; FIG. 5 is a perspective view of section VII of FIG. 4 with some parts added; FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 8; The perspective view of the X section of FIG. FIG. 2 is a schematic perspective view of the frame portion of the rear portion of the vehicle body of the embodiment;

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. In the following description, front and rear, up and down, and left and right refer to front and back, up and down, and left and right of the vehicle unless otherwise specified. In addition, an arrow UP pointing upward of the vehicle, an arrow FR pointing forward of the vehicle, and an arrow LH pointing leftward of the vehicle are shown at appropriate locations in the drawing.

FIG. 1 is a rear view of a vehicle 1 of this embodiment with some members removed.
The vehicle 1 of this embodiment is a hatchback type vehicle in which a tailgate (not shown) is attached to the rear surface of the vehicle body so as to be able to flip up and rotate. Reference numeral 10 in the drawing denotes a tailgate opening at the rear of the vehicle body that is opened and closed by the tailgate. Pillar garters 11 having gutter grooves facing the rear of the vehicle body are arranged on the left and right side edges of the tailgate opening 10 . The gutter grooves of the left and right pillar garters 11 are covered by the tailgate when the tailgate is closed.

The upper end portions of the left and right pillar garters 11 are connected to each other by a roof cross member 12 (roof arch) at the rear end of the roof of the vehicle 1 at the upper end position of the tailgate opening 10 . Lower ends of the left and right pillar garters 11 are connected to each other at lower ends of the tailgate opening 10 by a rear panel cross member 13 extending substantially along the vehicle width direction. The rear panel cross member 13 is joined to a rear panel 14 fixed to the rear end portion of the rear floor panel 9 (see FIGS. 2 and 3) of the vehicle compartment, and forms a closed cross section extending substantially along the vehicle width direction together with the rear panel 14. forming.

The left and right pillar garters 11 gently incline outward in the vehicle width direction downward from the upper end of the tailgate opening 10, and then downward inward in the vehicle width direction from a substantially vertical center position of the tailgate opening 10. It is curved and slanted. A lamp housing plate 15 that opens toward the rear side of the vehicle body is arranged at a vehicle width direction outside position of a region of the pillar gutter 11 that is curved and inclined toward the vehicle width direction inside. A rear combination lamp (not shown) is accommodated inside the lamp housing plate 15 . Outer panels 16 on the sides of the vehicle body are arranged outside the left and right pillar garters 11 in the vehicle width direction.

2 is a bottom view of the rear portion of the vehicle 1, and FIG. 3 is a cross-sectional view taken along line III-III of FIG. 4 is a view taken along line IV in FIG. 2 with some parts removed, and FIG. 5 is a perspective view of a portion V in FIG.
As shown in FIGS. 2 to 4, rear side frames 17 are arranged on the left and right sides of the vehicle 1 so as to extend substantially in the longitudinal direction of the vehicle. A rear floor panel 9 is laid over the left and right rear side frames 17 . Rear wheel house inners 18 are disposed outside the left and right rear side frames 17 in the vehicle width direction so as to rise upward from the rear side frames 17 and cover the inner and upper sides of the rear wheels in the vehicle width direction. The rear wheel house inner 18 is formed by joining three panels in the longitudinal direction of the vehicle body.

The damper housing 19 bulges inward in the vehicle width direction above the rear side frame 17 . A thick damper base 20 that supports the upper portion of the rear damper is fixed to the upper wall 19a of the damper housing 19 by welding, bolting, or the like. A housing reinforcing member 21 is coupled to a portion of the damper housing 19 that bulges inward in the vehicle width direction so as to be continuous with an edge portion of the damper base 20 in the vehicle width direction. The housing reinforcing member 21 has a substantially U-shaped cross-section that protrudes inward in the vehicle width direction at a central portion in the front-rear direction and extends substantially along the vertical direction. The housing reinforcing member 21 is coupled to the damper housing 19 to reinforce the bulging portion of the damper housing 19 . A gusset 22 connects the lower edge of the housing reinforcing member 21 and the upper wall of the rear side frame 17 .

As shown in FIGS. 3 and 5, the gusset 22 includes an upper fastening portion 22a fastened and fixed by bolts 30 to the lower side surface (the surface facing inward in the vehicle width direction) and the front surface of the housing reinforcing member 21, and the rear floor panel. 9 and a lower fastening portion 22b that is fastened and fixed to an overlapping portion 31 between the upper surface of the rear side frame 17 and the upper surface of the rear side frame 17 with a bolt 32. In this embodiment, the upper fastening portion 22a is bolted to the side surface and front surface of the housing reinforcing member 21, but the upper fastening portion 22a may be bolted to the rear surface of the housing reinforcing member 21 as well. Also, the upper fastening portion 22 a may be fastened to the side surface and the rear surface of the housing reinforcing member 21 . A reinforcing bead 33 extending substantially in the vertical direction is formed at substantially the center position of the gusset 22 in the longitudinal direction of the vehicle body.

FIG. 6 is a cross-sectional view taken along line VI-VI of FIG.
As shown in FIG. 6, a side wall 19s of the damper housing 19 adjacent to the inner end of the damper base 20 in the vehicle width direction extends from below toward the upper end while being inclined inward in the vehicle width direction. On the other hand, the gusset 22 rises substantially vertically upward from the overlapping portion 31 of the rear floor panel 9 and the rear side frame 17 toward the upper end portion of the side wall 19 s of the damper housing 19 . Further, the side wall of the housing reinforcing member 21 also stands substantially vertically upward so as to be continuous with the gusset 22 .

In addition, a rear inside panel 24 is coupled to the outside position of the damper base 20 in the vehicle width direction so as to cover the side portion of the vehicle body inside the outer panel 16 . An upper reinforcing member 25 extending upward along the side of the vehicle body is arranged at a position connected to the outer edge of the damper base 20 in the vehicle width direction. The upper reinforcing member 25 is joined to the inner side surface of the rear inside panel 24 .

As shown in FIG. 6, the rear inside panel 24 includes a vertical wall 24a arranged on the outer side of the upper reinforcing member 25 in the vehicle width direction, and a curved wall 24a extending downward in the vehicle width direction from the lower end of the vertical wall 24a. and a curved wall 24b. The lower surface of the connection portion of the curved wall 24b with the vertical wall 24a is a substantially horizontal horizontal surface 24c. The outer edge in the vehicle width direction of the damper base 20 overlaps the horizontal surface 24c of the rear inside panel 24 and is welded and fixed to the horizontal surface 24c in this state.

Both ends of the lower end of the upper reinforcing member 25 in the longitudinal direction of the vehicle body are bent toward the upper wall 19 a of the damper housing 19 and welded to the upper wall 19 a of the damper housing 19 near the damper base 20 . Both ends of the upper end of the housing reinforcing member 21 in the longitudinal direction of the vehicle body are welded and fixed to the damper housing 19 in the vicinity of the damper base 20 . Therefore, the damper base 20 is coupled to the upper reinforcing member 25 and the housing reinforcing member 21 via the damper housing 19 .

5 and 6, the damper base 20 includes a substantially annular damper support portion 20a to which the upper portion of the rear damper is directly bolted, and an outer extension portion extending outward in the vehicle width direction from the damper support portion 20a. 20b and . The outer extending portion 20 b includes a top wall portion 35 extending along the vehicle width direction at the center in the front-rear direction, a front inclined portion 36 extending downward from the top wall portion 35 toward the front of the vehicle, and and a rearward inclined portion 37 that extends obliquely downward toward the rear side of the vehicle. A pair of welding grooves 38 extending in the longitudinal direction of the vehicle body are formed in the front inclined portion 36 and the rear inclined portion 37 so as to be recessed downward. A seat anchor 40 is welded to the welding groove 38 of the front inclined portion 36 for fixing the rear seat in the vehicle compartment.

The damper base 20 is formed symmetrically in the longitudinal direction of the vehicle, including the welding grooves 38 . Specifically, as shown in FIG. 5, the entire damper base 20 is formed symmetrically with respect to a straight line L passing through the center o of the damper support portion 20a and extending in the vehicle width direction. Therefore, the damper base 20 having the same specifications can be used in common for the left side and the right side of the vehicle body. However, when the damper base 20 is used on the right side of the vehicle body, the seat anchor 40 is welded and fixed to the welding groove 38 on the side opposite to that on the left side.

The side edges (pillar gutter 11, etc.) of the tailgate opening 10 at the rear of the vehicle body are inclined at a steep angle toward the front of the vehicle in areas above the height positions at which the left and right lamp housing plates 15 are arranged. (See Figure 3). As shown in FIG. 3 , the upper ends of the left and right pillar garters 11 are positioned almost directly above the left and right upper reinforcing members 25 .

Further, on the front side of the vehicle body of each of the left and right pillar garters 11, a garter inner 26 that is joined to the pillar garter 11 and forms a closed cross section with the pillar garter 11 is arranged. The pillar garter 11 and the gartain inner 26 extend to the rear surface of the outer panel 16 on the side of the vehicle body above the lamp housing plate 15 and are joined to the outer panel 16 . The pillar garter 11 and the gartain inner 26 together with the outer panel 16 form a substantially vertically extending closed cross-section, which constitutes a rear pillar 27 of the vehicle.

The ends of the rear panel cross member 13 and the rear panel 14 on both sides in the vehicle width direction extend across the lower regions of the peripheral walls of the left and right lamp housing plates 15 to abut the outer panel 16 on the side of the vehicle body. The pillar gutter 11 and the gartain inner 26 are curved inward in the vehicle width direction along the peripheral wall of the lamp housing plate 15 (avoiding the peripheral wall) at the position where the lamp housing plate 15 is arranged. In this region, the pillar garter 11 and the gartain inner 26 form a closed cross-section with the peripheral wall of the lamp housing plate 15 . This closed cross-section is continuous with the closed cross-section on the upper side formed by the pillar garter 11, the gartain inner 26 and the outer panel 16. As shown in FIG. The lower closed section formed by the pillar garter 11, the gartain inner 26 and the lamp housing plate 15 has a smaller cross-sectional area than the upper closed section formed by the pillar garter 11, the gartain inner 26 and the outer panel 16. there is The outer edge in the vehicle width direction of the rear panel 14 is joined to the lower end of the gartain inner 26 and the bottom wall of the lamp housing plate 15 .

The upper edge portion of the upper reinforcing member 25 extending upward from the vehicle width direction outside position of the damper base 20 overlaps the upper region of the gartain inner 26 constituting the rear pillar 27 from the vehicle width direction inside and is joined to the gartain inner 26 by welding or the like. It is The roof cross member 12 above the tailgate opening 10 is joined to the pillar garter 11 and the garte inner 26 at a position above the connecting portion 28 of the upper reinforcing member 25 and the garte inner 26 . The upper end of the gartain inner 26 extends further upward than the joint with the roof cross member 12 and is bent toward the front side of the vehicle body. The upper end portion of the gartain inner 26 is connected to the rear portion of a roof side rail 29 arranged laterally of the roof portion of the vehicle 1 .

7 is a perspective view of the VII section in FIG. 4 with the outer plate 17B of the rear side frame 17 removed, and FIG. 8 is a perspective view of the VII section in FIG. 4 with the outer plate 17B added. 9 is a cross-sectional view taken along line IX-IX in FIG. 8, and FIG. 10 is a perspective view of section X in FIG.
As shown in these figures, the rear side frame 17 includes a frame body 17A that opens outward in the vehicle width direction in a substantially U shape, and an outer plate 17B (closed plate) that is joined to the frame body 17A and opens and closes the opening of the frame body 17A. plate) and

As shown in FIG. 9, the frame main body 17A has joint flanges 17Au and 17Al extending from both end portions of a substantially U-shaped cross-sectional portion 17Aa that opens outward in the vehicle width direction. One joint flange 17Au is bent upward and extends from the end of the upper wall of the substantially U-shaped cross section 17Aa, and the other joint flange 17Al is the end of the lower wall of the substantially U-shaped cross section 17Aa. It extends straight toward the outside in the vehicle width direction.

The outer plate 17B has joint flanges 17Bu and 17Bl extending from a plate body portion 17Ba that closes the opening of the frame body 17A. One joint flange 17Bu extends straight upward from the upper end of the plate main body 17Ba, and the other joint flange 17Bl extends to the lower end of the plate main body 17Ba while bending outward in the vehicle width direction. there is The frame main body 17A and the outer plate 17B are joined together at the joint flanges 17Au and 17Bu on the upper side and joint flanges 17Al and 17Al on the lower side.
In addition, the lower edge of the side wall of the rear wheel house inner 18 (including the side wall 19s of the damper housing 19) is inserted between the joint flanges 17Au and 17Bu on the upper side of the frame body 17A and the outer plate 17B. The lower edge is sandwiched between the joints of joint flanges 17Au and 17Bu.

A plurality of partition members 42, 43A, 43B, and 44 (see FIG. 4) are arranged inside the closed cross section surrounded by the frame main body 17A and the outer plate 17B to reinforce the closed cross section. The partition member 42 is arranged near the front end of the rear side frame 17 , and the partition member 44 is arranged near the rear end of the rear side frame 17 . Moreover, the partition members 43A and 43B are arranged in the vicinity of the position directly below the installation of the damper housing 19 in the approximate center of the rear side frame 17 in the front-rear direction.

As shown in FIGS. 7 and 8, the partition members 43A and 43B arranged substantially in the center in the front-rear direction include a partition main body 45a, a bent piece 45b, a first insertion flange 45c, a second insertion flange 45d, It has a first folded flange 45e, a second folded flange 45f, and a third folded flange 45g. The partition main body portion 45a is formed in a substantially rectangular shape and extends within the closed cross section of the rear side frame 17 so as to traverse the closed cross section. The bent piece 45b is formed by bending an outer end portion of the partition wall main body portion 45a in the vehicle width direction at a substantially right angle in the front-rear direction.

The first insertion flange 45c is formed to extend upward from the upper portion of the bent piece 45b above the upper end portion of the partition main body portion 45a. The first insertion flange 45c is inserted between the joint flanges 17Au and 17Bu on the upper side of the frame body 17A and the outer plate 17B.

The second insertion flange 45d is formed by bending the lower end of the bent piece 45b outward in the vehicle width direction. The second insertion flange 45d is inserted between the joint flanges 17Al and 17Bl on the lower side of the frame body 17A and the outer plate 17B.

The first folded flange 45e is formed by bending the upper end portion of the partition main body portion 45a at a substantially right angle in the front-rear direction. The first folded flange 45e is joined to the lower surface of the upper wall of the substantially U-shaped cross section 17Aa. A weld nut 46 to which a shaft portion of a bolt 32 for fastening the lower fastening portion 22b of the gusset 22 to the rear side frame 17 is fastened is fixed to the first folded flange 45e. The shaft portion of the bolt 32 penetrates the upper wall of the substantially U-shaped cross-sectional portion 17Aa and is screwed into the weld nut 46 .

The second folded flange 45f is formed by bending the inner end portion of the partition main body portion 45a in the vehicle width direction at a substantially right angle in the front-rear direction. The second folded flange 45f is joined to the inner surface of the side wall of the substantially U-shaped cross section 17Aa.

The third folded flange 45g is formed by bending the lower end portion of the partition main body portion 45a at a substantially right angle in the front-rear direction. The third turn-back flange 45g is joined to the upper surface of the lower wall of the substantially U-shaped cross section 17Aa.
In the partition members 43A and 43B, the bending direction of the bending piece 45b and the first to third folding flanges 45e, 45f and 45g are opposite to each other, but both have the same function.

Further, as shown in FIG. 2, substantially H-shaped sub-frames 47 capable of mounting heavy objects such as a battery are installed on the lower surfaces of the left and right rear side frames 17 . The left and right ends of the sub-frame 47 are bolted to the vicinity of the partition members 42, 43A, 43B and 44 of the left and right rear side frames 17, respectively. Reference numeral 48 in FIG. 2 denotes bolts for fastening the sub-frame 47 to the rear side frame 17 .

10 is a perspective view of the X section of FIG. 4. FIG.
Collars 49 (collars having screw grooves) for fastening and fixing the rear portions of the subframes 47 with bolts 48 are integrally attached to the partition member 44 built in the rear end portion of the rear side frame 17 . The partition member 44 is fixed to the sub-frame 47 in the same manner as the central partition members 43A and 43B.

5 and 8, the outer surface of the outer plate 17B of the rear side frame 17 in the vehicle width direction is located at a position close to the lower end of the rear wall 19r of the damper housing 19. A support bracket 50 that connects the lower end of the rear wall 19r of the damper housing 19 is attached. The support bracket 50 includes a substantially triangular support wall 50a extending in a direction substantially orthogonal to the longitudinal direction of the vehicle body, a first flange 50b joined to the outer surface of the outer plate 17B in the vehicle width direction, and a second flange 50c joined to the lower end of the rear wall 19r of the damper housing 19 that bulges outward. The support bracket 50 increases the support rigidity of the damper housing 19 by joining the second flange 50 c to the rear wall 19 r of the damper housing 19 .
In the present embodiment, the support bracket 50 connects the outer surface of the outer plate 17B in the vehicle width direction and the lower end of the rear wall 19r of the damper housing 19, but the support bracket 50 does not connect the outer plate 17B in the vehicle width direction. The outer surface and the lower end of the front wall 19f of the damper housing 19 may be connected.

FIG. 11 is a diagram schematically showing the frame portion of the rear portion of the vehicle body of the vehicle 1 of this embodiment.
As shown in FIGS. 1 and 11, in the present embodiment, rear side frames 17, gussets 22, housing reinforcing members 21, damper bases 20, upper reinforcing members 25, rear pillars 27, etc., which are arranged on the left and right of the rear portion of the vehicle body, are arranged vertically. The roof cross member 12 and the subframe 47 are coupled to form a first annular frame 55A. Around the tailgate opening 10 at the rear of the vehicle body, the left and right rear pillars 27 are vertically coupled to the roof cross member 12 and the lower cross member (rear panel cross member 13 and rear panel 14) to form a second annular frame. 55B.

As described above, in the vehicle rear portion structure of the present embodiment, the upper fastening portion 22a of the gusset 22 is located on two or three sides with respect to the lower edge of the housing reinforcing member 21 having a substantially U-shaped cross section that continues to the damper base 20. The lower fastening portion 22b of the gusset 22 is bolted to the overlapped portion 31 of the rear floor panel 9 and the rear side frame 17 having a large total thickness. Therefore, the vertical load input from the rear dampers to the damper base 20 can be supported by the rear side frames 17 with high rigidity.

In addition, in the vehicle body rear structure of the present embodiment, the lower fastening portion 22b of the gusset 22 is fastened and fixed to the overlapping portion 31 of the rear floor panel 9 and the rear side frame 17 by the bolt 32, so that the rear floor panel 9 and the rear side frame 17 are fixed. There is no loss of waterproofness due to the sealer (filler) between the In this type of vehicle body rear structure, a sealer (filler) for preventing water intrusion is usually applied to the boundary portion of the overlapped portion of the rear floor panel 9 and the rear side frame 17 . In this embodiment, since the gusset 22 is fastened and fixed to the overlapping portion 31 by the bolt 32, the mounting of the gusset 22 does not adversely affect the sealer application portion.

Further, in the vehicle body rear portion structure of the present embodiment, the gusset 22 connecting the housing reinforcing member 21 and the rear floor panel 9 is formed with a reinforcing bead 33 extending substantially along the vertical direction. Therefore, the reinforcing bead 33 increases the cross-sectional rigidity of the gusset 22 in the vertical direction, making it possible to more rigidly transmit the load from the housing reinforcing member 21 to the rear side frame 17 .

Furthermore, in the vehicle body rear structure of the present embodiment, the side walls 19s of the damper housing 19 are inclined inward in the vehicle width direction from the bottom toward the upper end, so that a wide upper space in the damper housing 19 is ensured. be able to. Therefore, when this configuration is adopted, the degree of freedom in layout of the suspension components in the damper housing 19 can be increased.
Further, in this embodiment, since the gusset 22 stands substantially vertically upward from the overlapped portion 31 of the rear floor panel 9 and the rear side frame 17 toward the upper end portion of the side wall 19s, the damper base 20 and the rear side frame 17 do not move. can be connected by the shortest distance. Therefore, when this configuration is adopted, the vertical load input from the rear damper to the damper base 20 can be more rigidly supported by the rear side frames 17 .

Further, in the vehicle body rear structure of this embodiment, the partition members 43A and 43B are built in the closed cross section of the rear side frame 17, and the first insertion flange 45c and the second insertion flange 45d of the partition members 43A and 43B are connected to the frame main body. 17A and the outer plate 17B, and the first, second and third folding flanges 45e, 45f and 45g of the partition members 43A and 43B are respectively joined to the three wall surfaces of the frame body 17A. . A weld nut 46 that is fastened with a bolt 32 for fastening the lower fastening portion 22b of the gusset 22 to the rear side frame 17 is fixed to the first folded flange 45e that is joined to the upper wall of the frame body 17A. there is Therefore, when this configuration is adopted, the rigidity of the closed cross section of the rear side frame 17 can be efficiently increased by the partition members 43A and 43B, and the joint rigidity of the lower fastening portion 22b of the gusset 22 can be increased by the same partition member. 43A, 43B can be increased.

Furthermore, in the vehicle body rear portion structure of the present embodiment, a welding groove 38 for fixing the seat anchor 40 by welding is formed in the upper surface of the damper base 20 . Therefore, the seat anchor 40 can be stably welded and fixed to the upper surface of the damper base 20 having high rigidity, and the rigidity of the damper base 20 can be efficiently increased by the welding grooves 38 .

In particular, in the case of this embodiment, the welding grooves 38 are provided in pairs on the vehicle front side and the vehicle rear side on the upper surface of the damper base 20, and the entire damper base 20 is symmetrical in the vehicle front-rear direction. formed. Therefore, one specification of the damper base 20 can be shared between the left and right sides of the vehicle. Therefore, when this configuration is adopted, there is no need to separately manufacture the damper base 20 for the left side and the right side of the vehicle, so the productivity of parts can be improved.

Further, in the vehicle body rear portion structure of the present embodiment, the upper reinforcing member 25 extending upward from the vehicle width direction outside position of the damper base 20 and the housing reinforcement member 21 extending downward from the vehicle width direction inside position of the damper base 20 are It is joined to the damper housing 19 in the vicinity of the damper base 20 . Therefore, the vertical load applied to the damper base 20 from the rear damper can be efficiently transmitted to the upper and lower upper reinforcing members 25 of the damper base 20 and the housing reinforcing member 21 . Therefore, when this configuration is adopted, the support rigidity of the damper base 20 can be further increased.

Further, in the vehicle body rear portion structure of the present embodiment, the outer edge in the vehicle width direction of the damper base 20 is welded and fixed to the horizontal surface 24c of the rear inside panel 24 on the vehicle body side portion. Therefore, the load applied from the rear damper to the damper base 20 in a substantially horizontal direction can be received as a uniform load at the welded portion between the damper base 20 and the rear inside panel 24 . Therefore, when this configuration is adopted, the support rigidity of the damper base 20 in the substantially horizontal direction can be increased.

In addition, in the vehicle body rear structure of the present embodiment, the lower edge of the side wall 19s of the damper housing 19 is sandwiched between the joint flanges 17Au and 17Bu on the upper side of the rear side frame 17, and the front wall 19f of the damper housing 19 is held. A support bracket 50 connects between the lower end and the outer surface of the rear side frame 17 in the vehicle width direction (the outer surface of the outer plate 17B). Therefore, when this configuration is adopted, the rigidity of the damper housing 19 can be efficiently increased.

Further, in the vehicle body rear portion structure of the present embodiment, the upper region of the upper reinforcing member 25 extending upward from a position connected to the outer edge portion of the damper base 20 in the vehicle width direction is positioned with respect to the rear pillar 27 at the rear portion of the vehicle body that is inclined forward. They are joined at a slanted connection 28 . Therefore, a large joint area between the upper reinforcing member 25 and the rear pillar 27 can be secured. Therefore, when this configuration is adopted, the load transmitted from the rear damper to the upper reinforcing member 25 via the damper base 20 can be efficiently transmitted to the roof cross member 12 via the rear pillar 27 .

In addition, in the rear vehicle body structure of the present embodiment, partition wall members 43A and 43B are built in the portions of the rear side frames 17 to which the lower fastening portions 22b of the gussets 22 are connected. A sub-frame 47 connects the vicinity of the lower portions of the built-in portions of 43A and 43B. Therefore, in this structure, the sub-frame 47 at the lower part of the vehicle body and the roof cross member 12 at the upper part of the vehicle body are combined with the left and right rear side frames 17, the gusset 22, the housing reinforcement member 21, the damper base 20, the upper reinforcement member 25, the rear pillar 27, and the like. It constitutes the first annular skeleton 55A at the rear part of the vehicle body. Therefore, when this configuration is employed, the rigidity of the entire rear portion of the vehicle body can be increased by the first annular frame 55A.

In addition, in the present embodiment, the lower ends of the rear pillars 27 on the left and right sides of the vehicle body extend to positions rearward of the rear floor panel 9, and the lower ends are connected to each other by lower cross members (rear panel cross member 13 and rear panel 14). there is Therefore, in this structure, the lower cross member (rear panel cross member 13 and rear panel 14) constitutes the second annular frame 55B at the rear of the vehicle body together with the left and right rear pillars 27 and the roof cross member 12. As shown in FIG. The roof cross member 12 on the upper part of the vehicle body is shared by the first annular frame 55A and the second annular frame 55B as a common lateral member. Therefore, when this configuration is adopted, the rigidity of the entire rear portion of the vehicle body can be further increased by the first annular skeleton 55A and the second annular skeleton 55B that are coupled to each other.

The present invention is not limited to the above-described embodiments, and various design changes are possible without departing from the gist of the present invention.

9 … Rear floor panel (floor panel)
12 ... Roof cross member 13 ... Rear panel cross member (lower side cross member)
14 ... rear panel (lower side cross member)
17... Rear side frame 17A... Frame main body 17B... Outer plate (closure plate)
17Aa Approximately U-shaped cross section 17Au, 17Al Joint flange 19 Damper housing 19s Side wall 19f Front wall 19r Rear wall 20 Damper base 21 Housing reinforcing member 22 Gusset 22a Upper fastening portion 22b Lower side Fastening portion 24 Rear inside panel 24c Horizontal surface 25 Upper reinforcing member 27 Rear pillar 31 Overlapping portion 32 Bolt 33 Reinforcing bead 38 Welding groove 40 Seat anchor 43A, 43B Partition member 45a Partition main body 45c 1st insertion flange 45d 2nd insertion flange 45e 1st folded flange 45f 2nd folded flange 45g 3rd folded flange 46 weld nut 47 subframe 50 support bracket

Claims (11)

a rear side frame extending substantially along the longitudinal direction of the vehicle on both left and right sides of the vehicle;
a damper housing that rises upward from the outer edge in the vehicle width direction of the rear side frame and covers the inner side and the upper side in the vehicle width direction of the rear damper for suspension of the rear wheels;
a damper base that is fixed to the upper wall of the damper housing and supports an upper portion of the rear damper;
a floor panel whose outer edge in the vehicle width direction is coupled to the rear side frame;
a housing reinforcing member coupled to the inner side of the damper housing in the vehicle width direction so as to connect to the inner edge of the damper base in the vehicle width direction to reinforce the damper housing;
a gusset connecting the lower edge of the housing reinforcing member and the rear side frame;
The housing reinforcing member has a substantially U-shaped cross-section whose center in the front-rear direction projects inward in the vehicle width direction and extends substantially along the vertical direction,
The gusset is
an upper fastening portion bolted to at least one of a lower side surface of the housing reinforcing member and a lower front surface and a rear surface of the housing reinforcing member;
a lower fastening portion bolted to the overlapped portion of the floor panel and the rear side frame;
a side wall of the damper housing adjacent to the inner end in the vehicle width direction of the damper base extends obliquely inward in the vehicle width direction from below toward the upper end;
The rear portion structure of the vehicle body, wherein the gusset stands substantially vertically upward from the overlapped portion of the floor panel and the rear side frame toward the upper end portion of the side wall. 2. The vehicle body rear portion structure according to claim 1, wherein said gusset has a reinforcing bead extending substantially along the vertical direction. The rear side frame is
a frame body having joint flanges extending from both ends of a substantially U-shaped cross-sectional portion that opens in one direction in the vehicle width direction;
a closing plate that is joined to the joint flanges at both ends of the frame body and that closes the opening of the substantially U-shaped cross-sectional portion;
a partition member that reinforces a closed cross section surrounded by the frame main body and the closing plate;
The partition member is
a bulkhead main body extending within the closed cross section so as to traverse the closed cross section;
a first insertion flange connected to the partition main body and inserted between the joint flange on one side of the frame main body and the closing plate;
a second insertion flange connected to the partition main body and inserted between the other joining flange of the frame main body and the closing plate;
a first turn-back flange connected to the bulkhead main body and joined to the upper wall of the substantially U-shaped cross section;
a second turn-back flange connected to the bulkhead main body and joined to a side wall of the substantially U-shaped cross section;
a third turn-back flange connected to the bulkhead main body and joined to the lower wall of the substantially U-shaped cross section;
3. A bolt for fastening the lower fastening portion of the gusset to the rear side frame, or a weld nut to which the bolt is fastened is fixed to the first folded flange. The rear body structure described in . The vehicle body rear structure according to any one of claims 1 to 3, wherein a welding groove for welding and fixing a seat anchor is provided on the upper surface of the damper base. The welding grooves are provided in pairs on the vehicle front side and the vehicle rear side of the upper surface of the damper base,
5. The rear vehicle body structure according to claim 4, wherein the damper base including the welding groove is formed in a symmetrical shape in the longitudinal direction of the vehicle. further comprising an upper reinforcing member extending upward along the vehicle body side portion from a position contiguous with the outer edge portion of the damper base in the vehicle width direction;
The vehicle body rear structure according to any one of claims 1 to 5, wherein the upper reinforcing member and the housing reinforcing member are joined to the damper housing in the vicinity of the damper base. further comprising a rear pillar on the rear side of the vehicle body that extends obliquely forward from below toward the upper end of the vehicle body, the upper end being connected to a roof cross member at the rear end of the roof;
7. The vehicle body rear structure according to claim 6, wherein the upper reinforcing member is coupled to the inclined rear pillar. A bulkhead member for reinforcing a cross section of the rear side frame is built in a portion of the rear side frame to which the lower fastening portion of the gusset is connected,
8. The rear part of the vehicle body according to claim 7, wherein sub-frames that are laid over the left and right rear side frames are connected to a portion of the rear side frame that is near the lower portion of the portion in which the partition member is built. structure. 9. The vehicle body rear structure according to claim 8, wherein the rear pillars on the right and left sides of the vehicle body have lower ends extending to positions rearward of the floor panel, and the lower ends are connected to each other by a lower cross member. The rear side frame is
a frame body having joint flanges extending from both ends of a substantially U-shaped cross-sectional portion that opens in one direction in the vehicle width direction;
a closing plate that is joined to the joint flanges at both ends of the frame body and that closes the opening of the substantially U-shaped cross-sectional portion;
The damper housing is
a side wall covering the inner side of the rear damper in the vehicle width direction;
a front wall extending outward in the vehicle width direction from a front end portion of the side wall;
a rear wall extending outward in the vehicle width direction from the rear end of the side wall;
a lower edge of the side wall of the damper housing is sandwiched between a joint between the joint flange on the upper side of the frame body and the closing plate;
10. The lower end of the front wall of the damper housing or the lower end of the rear wall of the damper housing and the outer surface of the closing plate are connected by a support bracket. The rear body structure described in . a rear side frame extending substantially along the longitudinal direction of the vehicle on both left and right sides of the vehicle;
a damper housing that rises upward from the outer edge in the vehicle width direction of the rear side frame and covers the inner side and the upper side in the vehicle width direction of the rear damper for suspension of the rear wheels;
a damper base that is fixed to the upper wall of the damper housing and supports an upper portion of the rear damper;
a floor panel whose outer edge in the vehicle width direction is coupled to the rear side frame;
a housing reinforcing member coupled to the inner side of the damper housing in the vehicle width direction so as to connect to the inner edge of the damper base in the vehicle width direction to reinforce the damper housing;
a gusset connecting the lower edge of the housing reinforcing member and the rear side frame;
The housing reinforcing member has a substantially U-shaped cross-section whose center in the front-rear direction projects inward in the vehicle width direction and extends substantially along the vertical direction,
The gusset is
an upper fastening portion bolted to at least one of a lower side surface of the housing reinforcing member and a lower front surface and a rear surface of the housing reinforcing member;
a lower fastening portion bolted to the overlapped portion of the floor panel and the rear side frame;
further comprising a rear inside panel extending so as to cover a vehicle body side portion at a position outside the damper base in the vehicle width direction;
The vehicle rear portion structure, wherein a vehicle width direction outer edge of the damper base is welded to a horizontal surface of the rear inside panel.

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