JP2016215666A - Rear vehicle body structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rear vehicle body structure of a vehicle which does not narrow down a cabin, suppresses the deformation of a rear wheel house by a minimum reinforcement which is not connected to a damper support part or the like, and can make compatible both the improvement of rigid feeling and the improvement of door support rigidity at a side collision.SOLUTION: A reinforcing member 60 which connects a wheel arch face 19d of a rear wheel house outer 19 and a flange part 19a of the rear wheel house outer 19 is arranged at an intermediate region of a rear wheel house 17 between a damper support part and a front-side support part 42 of a rear suspension which is arranged at a vehicle body in front of the damper support part in a vehicle fore-and-aft direction, and a rear end part of a door impact bar located in a rear door with respect to the reinforcing member 60 is arranged so as to be overlapped in a vehicle side face view.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rear vehicle body structure in which a rear wheel house is formed by a rear wheel house inner provided with a damper support portion and a rear wheel house outer provided outside the rear wheel house inner in the vehicle width direction. About.

  Generally, the rear wheel house is formed by a rear wheel house inner and a rear wheel house outer provided on the outer side in the vehicle width direction of the rear wheel house inner. The above-described rear wheel house inner has a damper support portion. Is provided.

  By the way, when a load is applied to the damper support portion during running on a rough road or sudden turn of the vehicle, a compressive load or a tensile load is generated in the rear wheel house between the damper support portion and the trailing arm support portion. Bending and stretching deformation occurs in the middle part of the house (specifically, the middle part of the rear wheel house in the vehicle longitudinal direction and the middle part in the vertical direction). The above-described damper support portion and trailing arm support portion are hardly deformed and are characterized in that stress concentrates in the middle portion of the rear wheel house.

In order to prevent such bending and stretching deformation of the middle part of the rear wheel house, it is conceivable to form the rear wheel house, in particular, the rear wheel house inner with a panel member having a large plate thickness. There is a problem that the weight efficiency deteriorates.
In addition, as another means for preventing the bending and stretching deformation described above, a reinforcement may be provided in the rear wheel house so as to connect the damper support portion and the side sill, thereby forming a double closed cross section in the rear wheel house. Although considered, this case is also not preferable from the viewpoint of weight efficiency.

On the other hand, as a structure for reinforcing the middle part of the rear wheel house, there is one disclosed in Patent Document 1.
In this patent document 1, a reinforcing member is connected between a front flange portion of a rear wheel house inner and a diagonal member as a frame structure for supporting a damper support portion.

  In the conventional structure disclosed in Patent Document 1, since the above-described reinforcing member is provided at a height position corresponding to the door latch mechanism, the side impact resistance can be improved. Due to the relationship provided on the rear wheel house inner side, increasing the closed section and increasing the section modulus has the problem of narrowing the passenger compartment. Further, since the mounting position of the above-mentioned reinforcing member is a position corresponding to the door latch mechanism, although it is effective for improving the side collision rigidity, it is not so effective for improving the rigidity feeling. .

  Further, Patent Document 2 discloses a vehicle body structure including a rear side door, a rear wheel house, a side sill, and a side sill rain. Further, a resin-made and honeycomb-like reinforcing member is bonded and bonded.

  The conventional structure disclosed in Patent Document 2 has the advantage that the above-described reinforcing member can suppress the collapse of the cross-section of the closed cross-section of the rear wheel house and suppress the reduction in the rigidity of the vehicle body. Since the reinforcing member is disposed in the cross section, the cost is increased. Further, at the time of a side collision of the vehicle, the above-described reinforcing member pushes the front flange portion of the wheel house inner, so there is room for improving the side collision resistance.

  That is, the conventional structure disclosed in Patent Document 2 has a high cost, and the side impact rigidity is not sufficiently improved, so there is room for improvement.

JP 2014-131889 A JP 2013-248908 A

  Therefore, the present invention provides a minimum reinforcement that does not narrow the passenger compartment and is not connected to the damper support portion, etc., and suppresses deformation of the rear wheel house, improving the rigidity feeling and improving the door support rigidity at the time of a side collision. An object of the present invention is to provide a rear body structure of a vehicle that can be compatible.

  The rear vehicle body structure of the vehicle according to the present invention includes a rear wheel house inner provided with a damper support portion and a rear wheel house outer provided on the outer side in the vehicle width direction of the rear wheel house inner to form a rear wheel house. A rear vehicle body structure of the vehicle, the intermediate portion of the rear wheel house between the damper support portion and the front support portion of the rear suspension provided on the vehicle body forward of the vehicle front-rear direction with respect to the damper support portion. A reinforcing member for connecting the wheel arch surface of the rear wheel house outer and the flange portion of the rear wheel house outer is provided, and a rear end portion of the door impact bar located in the rear door is provided with respect to the reinforcing member. It is provided so as to overlap in a side view of the vehicle.

According to the above configuration, the intermediate part of the rear wheel house between the damper support part and the rear suspension front support part is locally reinforced by the reinforcing member, so that the intermediate part against vibration during traveling is provided. It is possible to efficiently suppress the bending and stretching deformation of the door and increase the sense of rigidity, and the reinforcement member and the rear end of the door impact bar overlap in a side view of the vehicle. The rear end of the bar can be supported to receive the rear door, and the wheel arch surface of the rear wheel house outer and the flange portion are connected on the rear wheel house outer side, so that the most deformable part is deformed. In addition, the rigidity is enhanced without narrowing the passenger compartment, and the reinforcement is minimal, so it is lightweight and requires a long reinforcing member like the conventional structure. No, nor to squeeze the passenger compartment.
In short, the minimum reinforcement that does not narrow the passenger compartment and does not connect to the damper support part, etc., can suppress the deformation of the rear wheel house, improve both rigidity and improve the door support rigidity at the time of side impact. it can.

  In one embodiment of the present invention, the reinforcing member has a plate shape, and a closed cross section extending along the rear wheel house is formed between the reinforcing member and the rear wheel house outer.

  According to the above configuration, since the reinforcing member is plate-shaped, the reinforcing member is moderately stretched against bending and stretching deformation of the rear wheel house due to running vibration, and the reinforcing member has tensile rigidity against side impact load. By exhibiting it, it is possible to achieve both reduction of the burden on the welded portion around the reinforcing member during traveling and securing of the side collision rigidity. Further, it is only necessary to partially attach the reinforcing member only to the rear wheel house outer. In this case, the assembling property can be improved.

  In one embodiment of the present invention, the reinforcing member is plate-like, and a closed cross section extending along the rear wheel house is formed between the reinforcing member and the rear wheel house outer. A leg portion extending toward the outer side is provided.

  According to the above configuration, the leg portion provided on the reinforcing member forms a box shape with the rear wheel house outer, the reinforcing member, and the leg portion, and the rigidity is increased. Since the decrease in bending strength can be prevented, the support rigidity of the door impact bar at the time of a side collision is increased, and the entry of the door can be suppressed.

In one embodiment of the present invention, a load transmission of the moment is applied to a bending or torsional deformation moment between the rear wheel house outer and the reinforcing member at the end of the leg portion on the rear wheel house outer side. The load transmission suppression part which suppresses is provided.
The above-described load transmission suppressing portion may be a fragile portion or a space portion (gap) formed between the leg portion and the rear wheel house outer.

According to the above configuration, the vibration of the rear wheel house in the normal state can be suppressed by the load transmission suppressing portion, and at the time of a side collision, the load transmission suppressing portion is crushed, but the leg portion is stretched, so that Can prevent the collapse of the cross section, support the door impact bar, and suppress the intrusion of the door.
In short, while increasing the stress on the joint between the reinforcing member and the rear wheel house outer when traveling on rough roads, etc., it balances the improvement of rigidity, suppression of door entry, and driving durability at a high level. be able to.

  In one embodiment of the present invention, the reinforcing member includes a mounting portion for a sound insulating member that shields a front closed cross section formed between the rear wheel house outer and the body side outer panel in front of the rear wheel house. It is provided.

  According to the above configuration, since the sound insulation member mounting portion is provided on the reinforcement member, the reinforcement member also serves as a support portion for the sound insulation member, and the reinforcement member does not completely divide the front closed section. Sound insulation can be easily achieved by one sound insulation member.

  According to the present invention, the minimum reinforcement that does not narrow the passenger compartment and is not connected to the damper support portion, etc., suppresses deformation of the rear wheel house, improves the rigidity feeling, and improves the door support rigidity at the time of a side collision. There is an effect that can be compatible.

The side view which shows the rear part vehicle body structure of the vehicle of this invention The perspective view which shows the principal part of FIG. 1 in the state seen from the vehicle front and the vehicle width direction inner side upper direction 1 is a cross-sectional view taken along the line AA in FIG. 3 is a perspective view. 1 is a cross-sectional view of the main part along the line BB in FIG. Front view showing the trailing arm support Side view showing overlap structure of door impact bar and reinforcing member The perspective view shown in the state which attached the sound insulation member to the reinforcement member Arrow view of reinforcing member alone along line CC in FIG. Side view showing another embodiment of overlap structure of door impact bar and reinforcing member 10 is a perspective view of the reinforcing member shown in FIG. (A) is a perspective view showing still another embodiment of the reinforcing member, (b) is a cross-sectional view taken along line DD of FIG. 12 (a), and (c) is a displacement state of the reinforcing member at the time of a side collision. Cross section shown

  With the minimum reinforcement that does not narrow the passenger compartment and is not connected to the damper support part, etc., the purpose of suppressing deformation of the rear wheel house, improving both rigidity and improving door support rigidity during side impacts, In the rear vehicle body structure in which a rear wheel house is formed by a rear wheel house inner provided with a damper support portion and a rear wheel house outer provided on the outer side in the vehicle width direction of the rear wheel house inner. A wheel arch surface of the rear wheel house outer at an intermediate portion of the rear wheel house between a support portion and a front support portion of a rear suspension provided on the vehicle body in the front-rear direction of the vehicle with respect to the damper support portion; A reinforcing member that connects the flange portion of the rear wheel house outer is provided, and is located in the rear door with respect to the reinforcing member. The rear end of the A impact bar is realized in configurations that are provided to overlap when viewed from the side of the vehicle.

An embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view of the rear body structure of the vehicle, FIG. 2 is a perspective view of the main part of FIG. 1 as viewed from the front of the vehicle and from the upper side in the front of the vehicle, and FIG. FIG. 4 is a perspective view showing the configuration of FIG. 3 as seen from the front of the vehicle and from the upper outside in the vehicle width direction. However, in FIG. 1, it has illustrated in the state which removed the body side outer panel of the vehicle rear part. 1 and 2, the sound insulation member is not shown.

  Further, since the rear vehicle body structure of the vehicle of this embodiment is formed symmetrically or substantially symmetrically, the configuration on the right side of the vehicle will be mainly described.

In FIG. 1, a side sill 1 extending in the front-rear direction of the vehicle is provided at a lower portion of the side portion of the vehicle body, and a hinge pillar having a closed cross-sectional structure extending upward from the front end is connected to the front end of the side sill 1.
The upper pillar of the above-mentioned hinge pillar is connected to a front pillar having a closed cross-sectional structure extending obliquely rearward and upward from the upper edge, and the front pillar has a closed cross-sectional structure extending rearward continuously from the front pillar. The roof side rail 2 is provided.

  As shown in FIG. 2, the above-mentioned side sill 1 includes a side sill inner 3, a side sill first reinforcement 4, a side sill second reinforcement 5, and a side sill outer 6 shown in FIG. The vehicle body strength member has a side sill closed section extending in the front-rear direction.

As shown in FIG. 1, the above-described roof side rail 2 includes a plurality of reinforcements 7, 8, and 9, and extends between the roof side rail inner and the roof side rail outer 10 in the front-rear direction of the vehicle. A vehicle body strength member having a roof side closed cross section.
Further, the intermediate portion in the front-rear direction of the side sill 1 and the intermediate portion in the front-rear direction of the roof side rail 2 are connected by a center pillar 11 having a closed cross-sectional structure extending in the vertical direction.

  Then, an opening 12 for getting on and off the front seat occupant that is surrounded by the front part of the side sill 1, the hinge pillar, the front pillar, the front part of the roof side rail 2, and the center pillar 11 and is located on the side part of the vehicle body ( A so-called front door opening) is provided, and the opening 12 is configured to be opened and closed by a front door as a side door.

  As shown in FIG. 1, an intermediate pillar 13 having a closed cross-sectional structure extending downward and rearward from a portion corresponding to the reinforcement 8 of the roof side rail 2 is provided. The intermediate pillar 13 (so-called quarter pillar) is a vehicle body strength member having an intermediate pillar reinforcement 14 and having a closed cross section formed by an intermediate pillar inner and an intermediate pillar outer.

  An opening 15 (so-called rear door) for passengers getting on and off the rear seat, which is surrounded by the rear portion of the side sill 1, the center pillar 11, the rear portion of the roof side rail 2, and the intermediate pillar 13 and located on the side surface portion of the vehicle body. An opening) is provided, and the opening 15 is configured to be opened and closed by a rear door 16 (see FIG. 3) as a side door.

  As shown in FIGS. 1, 2, and 3, a rear wheel house 17 that constitutes a lower portion of the side wall of the vehicle body is provided behind the rear door 16 described above. As shown in FIG. 3, the rear wheel house 17 is formed by a rear wheel house inner 18 and a rear wheel house outer 19 provided outside the rear wheel house inner 18 in the vehicle width direction. A body side outer panel 20 as a vehicle body outer plate is provided at the front portion and the vehicle width direction outer side portion of the house outer 19, and a rear wheel house 17 is provided between the body side outer panel 20 and the rear wheel house outer 19. A front closed section 21 located in front is formed.

  As shown in FIG. 3, the rear wheel house inner 18 includes a front joint flange portion 18a extending in the front-rear direction, a wheel arch portion 18b extending in a vehicle shape inward from the rear end of the front joint flange portion 18a, A vertical wall portion 18c extending rearward from the rear end of the wheel arch portion 18b is provided.

  As shown in FIG. 3, the rear wheel house outer 19 includes a front joint flange portion 19a that extends in the front-rear direction, and an inclined wall portion 19b that extends rearward and inward in the vehicle width direction from the rear end of the front joint flange portion 19a. A vertical wall portion 19c extending rearward from the rear end of the inclined wall portion 19b, a wheel arch portion 19d extending in a curved shape outward from the rear end of the vertical wall portion 19c, and a rear end of the wheel arch 19d And a vertical wall portion 19e extending rearward of the vehicle.

The front-side joining flange portion 18a of the rear wheel house inner 18 is joined and fixed to the vertical wall portion 19c of the rear wheel house outer 19 by means such as spot welding.
Further, the front end portion 20a and the rear end portion 20b of the body side outer panel 20 are bonded and fixed to the front side connecting flange portion 19a and the vertical wall portion 19e of the rear wheel house outer 19 using an adhesive or the like.

  As shown in FIG. 1, a rear pillar 22 having a closed cross-sectional structure extending rearward and downward is provided at the rear part of the roof side rail 2, and a rear end side panel 23 is provided at the lower part of the rear pillar 22. At the same time, the rear portion of the rear wheel house outer 19 and the rear end side panel 23 are connected by a rear side panel 24.

  Further, as shown in FIG. 1, a side panel inner upper 25 and a side panel inner lower 26 constituting the upper part of the side wall of the vehicle body are provided so as to partially overlap with the rear lower side of the intermediate pillar reinforcement 14 described above. A pillar-shaped reinforcing member 27 is attached from the side panel inner upper 25 and the side panel inner lower 26 to the top of the wheel arch portion 19 d of the rear wheel house outer 19.

  Further, the quarter window opening 28 surrounded by the rear portion of the roof side rail 2, the intermediate pillar 13, the side panel inner upper 25, and the rear pillar 22 (specifically, the corner reinforcement above the rear pillar). Is forming.

  FIG. 5 is a cross-sectional view taken along the line B-B in FIG. 1, and FIG. 6 is a front view showing the trailing arm support.

  As shown in FIGS. 2 and 6, a rear floor 30 (a part of the floor panel) comprising a side floor panel 31 and a central floor panel 32 is provided, and on the upper side of the rear floor 30 as shown in FIG. The rear side frame upper 33 is joined and fixed to the lower side of the rear floor 30, and the rear side frame lower 34 is joined and fixed to the rear floor 30 and the rear side frame upper 33, and between the rear floor 30 and the rear side frame lower 34. A closed cross section extending in the front-rear direction of the vehicle is formed between each.

  As shown in FIG. 2, a rear floor pan 35 is integrally or integrally lowered at the rear portion of the rear floor 30 and in the center in the vehicle width direction, while the wheel arch portion of the rear wheel house inner 18 is formed from the side panel inner lower 26. A damper support portion 36 extending in an inverted L shape when viewed from the front of the vehicle is provided over the top portion 18b and the vertical wall portion 18c.

As shown in FIG. 2, at the vehicle front position of the damper support portion 36 that is a vehicle body strength member, the wheel arch portion 18b top portion, the vertical wall portion 18c, and the rear side frame upper 33 of the rear wheel house inner 18 are extended from the side panel inner lower 26. A side brace 37 extending to the upper surface of the front end portion is provided, and as shown in FIG. 3, between the side brace 37 and the opposing member (side panel inner lower 26, wheel arch portion 18b, vertical wall portion 18c, rear side frame upper 33). A closed cross-section 38 that is substantially continuous in the vertical direction is formed.
The above-mentioned side braces 37 are provided on the left and right rear wheel house inners 18 and 18, respectively, and as shown in FIGS. 2 and 4, the rear floor is connected so that the lower portions of the left and right side braces 37 are connected in the vehicle width direction. A rear cross member 39 (so-called No. 4 cross member) having a hat cross-sectional shape is joined and fixed to the upper surface of 30, and a closed cross section extending in the vehicle width direction is provided between the rear cross member 39 and the rear floor 30. Is formed.

  As shown in FIGS. 2 and 4, a gusset 40 is provided to connect the lower portion of the side brace 37 and the end portion in the vehicle width direction of the rear cross member 39.

  As shown in FIGS. 2 and 6, a front support portion 42 of the trailing arm 41 is provided as an example of a front support portion of the rear suspension on the vehicle body in the front-rear direction of the vehicle with respect to the damper support portion 36 described above. Yes.

  As shown in FIG. 6, in the front support portion 42 of the trailing arm 41 described above, a link bracket 43 is stretched between the lower surface of the side floor panel 31 and the inner surface in the vehicle width direction of the rear side frame lower 34. The trailing arm mounting bracket 44 extending in the vehicle width direction is horizontally mounted between the link bracket 43 and the side sill inner 3, and the above-described link bracket 43 is disposed above the trailing arm mounting bracket 44. And a side sill inner 3 are connected in the vehicle width direction with a reinforcement 45 (specifically, a trailing arm attachment portion reinforcement).

  As shown in FIG. 6, the trailing arm 41 is attached to an arm shaft 48 via a tubular member 46 and a bush 47, and both left and right end portions of the arm shaft 48 are attached to the tray using attachment members 49. It is fixedly attached to the ring arm mounting bracket 44.

  FIG. 7 is a side view showing the overlap structure of the door impact bar and the reinforcing member (however, for convenience of illustration, the structure on the left side of the vehicle is shown).

As shown in FIGS. 3 and 7, the rear door 16 is formed by integrating the periphery of the door inner panel 50 and the door outer panel 51 by hemming. As shown in FIG. A portion 50A, an upper side portion 50B, a lower side portion 50C, a rear side lower portion 50D along the arch shape of the rear wheel house 17, and a rear side upper portion 50E extending upward from the rear side lower portion 50D are provided.
Door hinge brackets 52, 52 are attached to the front side 50 </ b> A above and below, and the front side 50 </ b> A is reinforced by a hinge reinforcement 53 extending in the vertical direction.

  In addition, a door impact bar 54 is provided that is connected in the front-rear direction in a substantially horizontal direction between the vertical intermediate portion of the hinge reinforcement 53 and the vertical intermediate portion of the rear lower portion 50D, and the hinge reinforcement is provided. 53 and a corner portion 50F of each of the side portions 50C, 50D are provided with door impact bars 55 that are connected in the slant direction in front and rear, and with the upper and lower door impact bars 54, 55, The side impact strength of the rear door 16 is improved.

  Further, a door latch disposing portion 56 is provided on the rear upper portion 50E, and a striker mounting portion 57 is provided on the body side corresponding to the door latch disposing portion 56, that is, on the rear wheel house outer 19, as shown in FIG. The rear door 16 is appropriately locked by the door latch provided in the door latch arrangement portion 56 and the striker fixed to the striker mounting portion 57.

  Incidentally, when a load is applied to the damper support portion 36 shown in FIG. 2 during traveling on a rough road or sudden turn of the vehicle, the rear wheel between the damper support portion 36 and the front side support portion 42 of the trailing arm 41. A compressive load or a tensile load is generated in the house 17, and bending and stretching deformation may occur in an intermediate portion (an intermediate portion in the vehicle longitudinal direction and an intermediate portion in the vertical direction) of the rear wheel house 17 indicated by a virtual circle α in FIG. It turns out.

  Therefore, in this embodiment, in order to prevent such bending and stretching of the intermediate portion of the rear wheel house 17, as shown in FIGS. 1, 2, 3, and 7, the damper support portion 36 and the damper Between the front support part 42 of the trailing arm 41 provided in the vehicle body in front of the support part 36 in the front-rear direction of the vehicle, more specifically, the part corresponding to the door latch arrangement part 56 and the front support part 42 of the trailing arm 41. In particular, as shown in FIG. 3, an intermediate portion in the vehicle width direction of the wheel arch portion 19 d of the rear wheel house outer 19 and a front joint flange of the rear wheel house outer 19 A reinforcing member 60 for connecting the portion 19a is provided.

  As shown in FIGS. 3 and 4, the reinforcing member 60 is a plate-like member in which joint portions 60b and 60c are integrally bent before and after the reinforcing member main body 60a, and the front joint portion 60b is formed. It connects with the outer surface of the front side joining flange part 19a of the rear wheel house outer 19, and connects the back side joining part 60c with the vehicle width direction intermediate part front surface in the wheel arch part 19d.

  3 and 7, the rear end portion 54a of the upper door impact bar 54 of the upper and lower door impact bars 54, 55 located in the rear door 16 with respect to the reinforcing member 60 described above is provided. It is provided so as to overlap in a side view of the vehicle.

In this manner, the intermediate portion of the rear wheel house 17 between the damper support portion 36 (see FIG. 2) and the front support portion 42 of the trailing arm 41 is locally reinforced by the reinforcing member 60, whereby the vehicle It is configured to efficiently suppress bending and stretching deformation at the intermediate portion with respect to vibration during traveling, thereby enhancing the rigidity.
In other words, an intermediate portion of the rear wheel house 17 between the damper support portion 36 and the front support portion 42 of the trailing arm 41 is determined from both the damper support portion 36 and the front support portion 42 of the trailing arm 41. By reinforcing with the separated reinforcing members 60, it is configured to efficiently enhance the rigidity.

  Further, as shown in FIG. 7, the reinforcing member 60 and the rear end portion 54a of the door impact bar 54 overlap in a side view of the vehicle. The rear door 16 is received while supporting the portion 54a.

  Further, as shown by an arrow a in FIG. 3, the rear portion 50a of the door inner panel 50 of the rear door 16 that intrudes inward in the vehicle width direction at the time of a side collision is formed into a three-sheet overlapping portion of each element 20a, 60b, 19a. It is configured to accept.

  Furthermore, as shown in FIG. 3, by connecting the wheel arch portion 19d of the rear wheel house outer 19 and the front joint flange portion 19a with a reinforcing member 60 on the outside of the rear wheel house outer 19, deformation is most likely. By preventing the deformation of the parts and enhancing the rigidity without narrowing the passenger compartment, the vehicle is light by minimal reinforcement and does not require a long reinforcing member as in the conventional structure disclosed in Patent Document 1. It is constructed so as not to squeeze the chamber.

  In short, with minimal reinforcement that does not narrow the passenger compartment and is not connected to the damper support 36 or the side sill 1, the deformation of the rear wheel house 17 is suppressed, the rigidity is improved, and the door support rigidity at the time of a side collision is improved. It is configured to satisfy both.

Here, as shown in FIG. 3, the joint portion 60 c on the rear side of the reinforcing member 60 is connected to the intermediate portion in the vehicle width direction of the wheel arch portion 19 d that is most easily deformed of the wheel house outer 19. Sometimes, it is possible to prevent the front joint flange portion 19a and the front joint portion 60b from falling inward in the vehicle width direction by pulling the reinforcing member 60 from the connecting portion between the two 60c and 19d. That is, a plate-like member (reinforcing member 60) such as a panel is basically easily bent and deformed in the compression direction, but exerts a strong tension in the tensile direction. In the event of a collision, the front-side joining flange portion 19a and the front-side joining portion 60b can be protected by the tensile force, and weight reduction can be achieved while ensuring side-impact rigidity.
As shown in FIGS. 3 and 4, the reinforcing member 60 described above has a plate shape, and a closed cross-section 61 extending along the rear wheel house 17 is formed between the reinforcing member 60 and the rear wheel house outer 19.
By forming the reinforcing member 60 in the shape of a plate, the toughness of the reinforcing member 60 is increased, so that the reinforcing member 60 is moderately stretched against the bending and stretching deformation of the rear wheel house 17 due to running vibration, and the side impact load. In contrast, the reinforcing member 60 exhibits tensile rigidity, thereby reducing both the burden on the welded portion around the reinforcing member 60 during traveling and ensuring the side collision rigidity, and the reinforcing member 60 By adopting a structure that is partially attached only to the rear wheel house outer 19, it is configured to improve the assemblability.

  8 is a perspective view showing a state in which a sound insulating member is attached to the reinforcing member 60, and FIG. 9 is an arrow view of the reinforcing member 60 alone along the line CC in FIG.

  As shown in FIGS. 5 and 8, the above-described reinforcing member 60 includes a sound insulating member that shields the front closed section 21 formed between the rear wheel house outer 19 and the body side outer panel 20 in front of the rear wheel house 17. Mounting holes 60d and 60d are provided as 62 mounting portions.

  As shown in FIGS. 5 and 8, the above-described sound insulation member 62 includes a sound insulation panel 64 in which a large number of pins 63 are erected around the sound insulation member 64, and a pair of attachments extending upward from the vehicle width direction inner side of the sound insulation panel 64. A foam filling material 67 (provided by positioning on the sound insulation panel 64 by using the arm 65, a fastener 66 (see FIG. 5) integrally formed with the pair of mounting arms 65, and the above-mentioned numerous pins 63). In the drawing, a state before foaming is shown).

  Then, the above-mentioned fastener 66 is engaged and fixed in the mounting hole 60d of the reinforcing member 60 shown in FIG. 9, so that the sound insulating member 62 is attached to the lower portion of the reinforcing member 60 as shown in FIGS. The foam filling material 67 is foamed in a mousse shape by heat at the time of coating and drying, and the front closed section 21 is closed.

  By increasing the positional accuracy of the foam filler 67 by the above-described sound insulating panel 64 and increasing the positional accuracy, the necessary amount of the foam filler 67 can be minimized. Since the reinforcing member 60 is provided only on a part of the rear wheel house outer 19 side, the entire front closed section 21 can be easily shielded after the foam filler 67 is foamed. , It is configured to reliably block noise from passing through.

  Thus, by providing the above-mentioned reinforcing member 60 with the mounting hole 60d as the mounting portion of the sound insulating member 62, the reinforcing member 60 also becomes a support portion of the sound insulating member 62, and the reinforcing member 60 is shown in FIG. Since the front closed section 21 is not completely divided, the single sound insulating member 62 can easily achieve sound insulation.

If the rear wheel house is provided with a reinforcement so as to connect the damper support part and the side sill and the above-mentioned front closed cross section is made into a double closed cross section, a filler is provided for each of the two closed cross sections. Thus, it is necessary to separately close the closed cross-sectional space having the double closed cross-section, but in this embodiment, the single sound-insulating member 62 can prevent vibration propagation and ensure sound insulation.
In the figure, arrow F indicates the front of the vehicle, arrow R indicates the rear of the vehicle, arrow IN indicates the inward in the vehicle width direction, and arrow OUT indicates the outward in the vehicle width direction.

  As described in detail above, the rear vehicle body structure of the vehicle of this embodiment includes the rear wheel house inner 18 provided with the damper support portion 36 and the rear wheel provided outside the rear wheel house inner 18 in the vehicle width direction. A rear vehicle body structure in which the rear wheel house 17 is formed with the house outer 19, the damper support portion 36, and a rear suspension provided on the vehicle body in the front-rear direction of the vehicle with respect to the damper support portion 36. A wheel arch surface of the rear wheel house outer 19 (see the wheel arch portion 19d) and the rear wheel house 17 are disposed at an intermediate portion of the rear wheel house 17 between the front support portion (see the front support portion 42 of the trailing arm 41). A reinforcing member 60 that connects the flange portion 19a of the wheel house outer 19 is provided. To one in which the rear end portion 54a of the door impact bar 54 located rear door 16 is provided so as to overlap when viewed from the side of the vehicle (1, 2, 3, see FIG. 7).

According to this configuration, an intermediate portion of the rear wheel house 17 between the above-described damper support portion 36 and the rear suspension front support portion (see the front support portion 42 of the trailing arm 41) is locally provided by the reinforcing member 60. By reinforcing, it is possible to effectively suppress bending and stretching deformation at the intermediate portion with respect to vibration during traveling, and to enhance the rigidity, and the rear end of the reinforcing member 60 and the door impact bar 54 Since the portion 54a overlaps in a side view of the vehicle, the rear end portion 54a of the door impact bar 54 can be supported by the reinforcing member 60 at the time of a side collision, and the rear door 16 can be received. Since the wheel arch surface (wheel arch portion 19d) of the rear wheel house outer 19 and the flange portion 19a are connected, it is most easily deformed. The deformation of the minute is prevented, the rigidity is enhanced without narrowing the passenger compartment, and since it is the minimum reinforcement, it is lightweight and may require a long reinforcing member like the conventional structure (see Patent Document 1). There is no pressure on the passenger compartment.
In short, with minimal reinforcement that does not narrow the passenger compartment and is not connected to the damper support 36 or the side sill 1, deformation of the rear wheel house 17 is suppressed, and a feeling of rigidity is improved, and a door support rigidity at the time of a side collision is improved. It can be compatible.

  In an embodiment of the present invention, the reinforcing member 60 is plate-shaped, and a closed cross section 61 extending along the rear wheel house 17 is formed between the reinforcing member 60 and the rear wheel house outer 19 (see FIG. 3).

  According to this configuration, since the reinforcing member 60 is plate-shaped, the reinforcing member 60 is moderately stretched against bending and stretching deformation of the rear wheel house 17 due to running vibration, and the reinforcing member 60 is against side impact loads. By exhibiting the tensile rigidity, it is possible to achieve both the reduction of the burden on the welded portion around the reinforcing member 60 during traveling and the securing of the side collision rigidity. Further, since the reinforcing member 60 is partially attached only to the rear wheel house outer 19, the assembling property can be improved.

  Furthermore, in one embodiment of the present invention, the reinforcing member 60 shields the front closed section 21 formed between the rear wheel house outer 19 and the body side outer panel 20 in front of the rear wheel house 17. An attachment portion (see attachment hole 60d) of the sound insulation member 62 is provided (see FIGS. 5, 8, and 9).

  According to this configuration, since the mounting portion (mounting hole 60d) of the sound insulating member 62 is provided in the reinforcing member 60, the reinforcing member 60 also serves as the supporting portion of the sound insulating member 62, and the reinforcing member 60 has a front closed cross section 21. Therefore, the sound insulation can be easily achieved by the single sound insulation member 62.

  FIG. 10 is a side view showing another embodiment of the overlap structure of the door impact bar 54 and the reinforcing member 60, and FIG. 11 is a perspective view of the reinforcing member 60 alone shown in FIG.

  The overlap structure of the door impact bar 54 and the reinforcing member 60 shown in FIG. 7 is a view from the vehicle side view of the reinforcing member 60 and the rear end portion 54a of the door impact bar 54 from the viewpoint of emphasizing rigidity and durability. A structure in which the lower part of the reinforcing member 60 is offset downward with respect to the lower end of the rear end portion 54a of the door impact bar 54 while being overlapped is employed.

  On the other hand, in the second embodiment shown in FIGS. 10 and 11, the reinforcing member 60 and the rear end portion 54a of the door impact bar 54 are overlapped in a side view of the vehicle from the viewpoint of emphasizing the side collision rigidity. A structure in which a part of the upper side of the reinforcing member 60 is offset upward with respect to the upper end of the rear end portion 54a of the door impact bar 54 is employed.

  Moreover, the reinforcing member 60 is plate-like as in the first embodiment, and a closed section 61 (see FIG. 3) extending along the rear wheel house 17 is formed between the reinforcing member 60 and the rear wheel house outer 19. 11, the upper and lower ends of the reinforcing member body 60a of the reinforcing member 60 extend toward the vertical wall portion 19c (see FIG. 3) of the rear wheel house outer 19, and the vertical wall portion 19c L-shaped leg portions 60e and 60f to be joined and fixed are provided.

  Thus, in the second embodiment shown in FIGS. 10 and 11, the reinforcing member 60 is plate-shaped and has a closed cross section 61 (FIG. 3) extending along the rear wheel house 17 between the reinforcing member 60 and the rear wheel house outer 19. 11) and leg portions 60e and 60f extending to the rear wheel house outer 19 side (in this embodiment, in the vehicle width direction) are provided at both upper and lower ends of the reinforcing member 60 (FIG. 11). reference).

  According to this configuration, the leg portions 60e and 60f provided on the reinforcing member 60 form a box shape by the rear wheel house outer 19 and the reinforcing member 60 and the leg portions 60e and 60f, thereby increasing the rigidity. Since the cross section can be prevented from collapsing with respect to the load and the bending strength can be prevented from being lowered, the support rigidity of the door impact bar 54 at the time of a side collision is increased, and the rear door 16 can be prevented from entering.

  Also in the second embodiment shown in FIGS. 10 and 11, the other configurations, operations, and effects are almost the same as those in the first embodiment. Therefore, in FIGS. Are attached with the same reference numerals, and detailed description thereof will be omitted. As shown by phantom lines in FIG. 11, a mounting hole 60d as a mounting portion of the sound insulating member 62 (see FIG. 8) is provided below the reinforcing member 60. , 60d, and the reinforcing member 60 may also serve as a support for the sound insulating member 62 shown in FIG.

  12 (a) is a perspective view showing still another embodiment of the reinforcing member 60, FIG. 12 (b) is a sectional view taken along the line DD of FIG. 12 (a), and FIG. 12 (c). These are sectional drawings which show the displacement state of the reinforcement member 60 at the time of a side collision.

  In the third embodiment shown in FIG. 12, in addition to the structure of the second embodiment shown in FIG. 11, the end portions on the rear wheel house outer 19 side of the upper and lower leg portions 60e, 60f, more specifically, the vertical wall portion 19c (see FIG. 3) at the end on the side, a fragile portion as an example of a load transmission suppressing portion that suppresses the load transmission of the moment against the bending or torsional deformation moment between the rear wheel house outer 19 and the reinforcing member 60 60g and 60g (bending part in this embodiment) are provided.

  As described above, in the third embodiment shown in FIG. 12, bending between the rear wheel house outer 19 and the reinforcing member 60 is performed at the end of the leg portions 60 e and 60 f on the rear wheel house outer 19 side. For the torsional deformation moment, a load transmission suppressing portion (see the fragile portion 60g) that suppresses load transmission of the moment is provided (see FIG. 12).

According to this configuration, the vibration of the rear wheel house 17 at the normal time can be suppressed by the load transmission suppressing portion (fragile portion 60g), and at the time of a side collision, as shown in FIG. Although the load transmission suppressing portion (fragile portion 60g) is crushed, the leg portions 60e and 60f are stretched to prevent further collapse of the cross section, support the door impact bar 54 (see FIG. 10), and prevent the rear door 16 from entering. Can be suppressed.
In short, while suppressing an increase in stress on the joint between the reinforcing member 60 and the rear wheel house outer 19 when traveling on a rough road, etc., it is possible to improve the rigidity, suppress door intrusion, and travel durability at a high level. Can be balanced.

  Also in the third embodiment shown in FIG. 12, the other configurations, operations, and effects are almost the same as those of the first and second embodiments. Therefore, in FIG. Although a detailed description thereof is omitted, as shown by an imaginary line in FIG. 12A, a mounting hole 60d as a mounting portion of the sound insulating member 62 (see FIG. 8) is provided below the reinforcing member 60. , 60d may be formed, and the reinforcing member 60 may also be used to support the sound insulating member 62 shown in FIG.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The flange portion of the rear wheel house outer of the present invention corresponds to the front joint flange portion 19a of the rear wheel house outer 19 of the embodiment,
Similarly,
The wheel arch surface corresponds to the wheel arch portion 19d,
The front support portion of the rear suspension corresponds to the front support portion 42 of the trailing arm 41,
The load transmission suppressing portion of the reinforcing member corresponds to the weakened portion 60g of the reinforcing member 60,
The mounting portion of the sound insulating member corresponds to the mounting hole 60d,
The present invention is not limited to the configuration of the above-described embodiment.
For example, the above-described front support portion of the rear suspension may be a support portion to which a load from the rear suspension is input in front of the vehicle relative to the damper support portion, and instead of the front support portion 42 of the trailing arm 41 of the embodiment. A suspension arm support other than the trailing arm, a torsion beam axle support, or a suspension cross member support that supports the suspension arm or torsion beam axle may be used.
For example, instead of the weak portion 60g of the embodiment, the above-described load transmission suppressing portion is a space portion formed between the leg portions 60e and 60f and the rear wheel house outer 19 (specifically, the vertical wall portion 19c) ( Gap).

  As described above, according to the present invention, a rear wheel house is formed by a rear wheel house inner provided with a damper support portion and a rear wheel house outer provided on the outer side in the vehicle width direction of the rear wheel house inner. This is useful for the rear body structure of the vehicle.

16 ... Rear door 17 ... Rear wheel house 18 ... Rear wheel house inner 19 ... Rear wheel house outer 19a ... Flange portion 19d ... Wheel arch portion (wheel arch surface)
DESCRIPTION OF SYMBOLS 20 ... Body side outer panel 21 ... Front closed cross section 36 ... Damper support part 41 ... Trailing arm 42 ... Front side support part 54 ... Door impact bar 60 ... Reinforcement member 60d ... Installation hole (attachment part of sound insulation member)
60e, 60f ... leg 60g ... weak part (load transmission suppressing part)
61 ... Closed section 62 ... Sound insulation member

Claims (5)

A rear vehicle body structure in which a rear wheel house is formed by a rear wheel house inner provided with a damper support portion and a rear wheel house outer provided on the outer side in the vehicle width direction of the rear wheel house inner,
A wheel arch surface of the rear wheel house outer is provided at an intermediate portion of the rear wheel house between the damper support portion and a front support portion of a rear suspension provided on the vehicle body in front of the damper support portion. And a reinforcing member that connects the flange portion of the rear wheel house outer,
A rear vehicle body structure of a vehicle, wherein a rear end portion of a door impact bar located in a rear door overlaps the reinforcing member in a side view of the vehicle. 2. The vehicle rear body structure according to claim 1, wherein the reinforcing member has a plate shape and a closed cross section extending along the rear wheel house is formed between the reinforcing member and the rear wheel house outer. The reinforcing member is plate-shaped, and a closed cross section extending along the rear wheel house is formed between the rear wheel house outer and the rear wheel house outer.
2. The vehicle rear body structure according to claim 1, wherein leg portions extending toward a rear wheel house outer side are provided at both upper and lower ends of the reinforcing member. A load transmission suppressing portion for suppressing load transmission of the moment with respect to a bending or torsional deformation moment between the rear wheel house outer and the reinforcing member is provided at an end portion of the leg portion on the rear wheel house outer side. The rear body structure of a vehicle according to claim 3. The reinforcing member is provided with a mounting portion for a sound insulation member that shields a front closed section formed between the rear wheel house outer and the body side outer panel in front of the rear wheel house. The rear body structure of the vehicle according to any one of the preceding claims.

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