JP4682561B2 - Rear body structure of the vehicle - Google Patents

Description

  The present invention relates to a rear vehicle body structure of a vehicle, and more specifically to a rear vehicle body structure in which an opening is provided in a vehicle body rear wall, and belongs to the technical field of the vehicle body structure.

  In general, in a vehicle, a suspension support portion that supports the rear wheel on the vehicle body is provided at the upper portion of the rear wheel house at the rear of the vehicle body, and a vehicle load acts on the support portion. It is important how the load transmitted to the upper part of the house is distributed to each part of the vehicle body.

  For example, in Patent Document 1, as a structure around the rear wheel house, in a sedan type vehicle, between the inner panel and the outer panel constituting the side wall of the rear part of the vehicle body, from the side of the suspension tower at the upper part of the rear wheel house, A rear fender reinforcement that extends and a rear pillar reinforcement that extends obliquely upward in the rear pillar from the side of the suspension tower is provided between the inner panel and the outer panel, and the rear fender reinforcement and the rear pillar reinforcement are provided. A technique for joining a vehicle to a side of a suspension tower is disclosed.

JP-A-5-16837

  By the way, when the technique described in Patent Literature 1 is applied to a vehicle of a type different from the sedan type as described above, there may be cases where the distribution of the load transmitted to the upper portion of the rear wheel house is not sufficient.

  Accordingly, the present invention provides a rear vehicle body structure for a vehicle having an opening in a rear wall of a vehicle body such as a hatchback vehicle, in which a load transmitted to the upper portion of the rear wheel house can be effectively distributed to the rear portion of the vehicle body. Is an issue.

  In order to solve the above-mentioned problems, the present invention is configured as follows.

That is, the present invention has a vehicle body rear wall having an opening, and bulges from the vehicle body side wall inwardly at a position apart a predetermined distance to the front side of the vehicle body from the vehicle body rear wall, the suspension device on top of the bulging portion A rear wheel house provided with a mounting portion , a rear end is joined to the vehicle body rear wall, a side member in the vehicle width direction is joined to the rear wheel house, the vehicle body side wall is provided, A rear vehicle body structure provided with a rear pillar portion extending upward from the vicinity of the rear wheel house and having an upper end joined to a roof rail portion, wherein the vehicle body rear wall includes an inner panel and an outer panel at an end portion along the opening. These panels are joined to each other, and these panels extend upward from the lower part of the rear wall of the vehicle body to the rear end of the roof rail part, and the upper part forms the rearmost pillar part of the vehicle body. Ri, and a load transfer member extending obliquely upwardly in the vehicle width direction outer side toward the rear pillar portion from the mounting portion near the rear wheel house of the upper part of the suspension apparatus, the front is in the vicinity mounting portion of the suspension system It is disposed along the bulging portion of the rear wheel house at a portion spaced from the lower end of a portion extending obliquely upward of the load transmitting member toward the floor member side, and is disposed on the inner panel at the peripheral portion of the opening in the rear wall of the vehicle body. And a connecting member extending rearward .

  Next, the effect of the present invention will be described.

According to the present invention, there is provided a rear wheel house having a vehicle body rear wall having an opening and bulging inward from the vehicle body side wall at a predetermined distance from the vehicle body rear wall to the vehicle body front side. In a vehicle provided with a pillar portion extending upward from the vicinity of the rear wheel house, the vehicle body load transmitted to the rear wheel house via the suspension device extends in the front-rear direction from the upper portion of the rear wheel house. Is transmitted from the upper part of the rear wheel house to the rear pillar portion of the side wall of the vehicle body via the load transmission member. That is, the load can be effectively distributed over a wide range at the rear of the vehicle body.

In that case, the rear pillar portion of the vehicle body side wall and the opening peripheral portion of the vehicle body rear wall are usually formed by joining a plurality of panel members, and are extremely rigid, so that the dispersed load is effectively received. be able to.

  Embodiments of the present invention will be described below.

  1 is an overall perspective view of the rear body of the vehicle according to the present embodiment as seen through obliquely from the front side of the vehicle body, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 4 is a cross-sectional view taken along line B-B, FIG. 4 is a cross-sectional view taken along line C-C in FIG. 1, and FIG. 5 is a cross-sectional view taken along line D-D in FIG. These drawings show a state in which an indoor trim or the like is not attached. Further, in these drawings, only one side wall side is shown, but the other side wall side also has a symmetrical structure, and the description thereof is basically omitted.

  As shown in FIG. 1, the vehicle body rear part of the vehicle 1 according to the present embodiment constitutes, as main components, a floor part 2 that constitutes the bottom surface of the vehicle body, a side wall part 3 that constitutes the side surface of the vehicle body, and a rear surface of the vehicle body. It has a rear wall portion 4 and a roof portion 5 constituting the upper surface of the vehicle body.

  A semicircular rear wheel house portion 6 that bulges inwardly of the vehicle body is provided at the lower portion of the side wall portion 3 among the above portions. An opening 8 corresponding to the back door 7 is provided in the rear wall portion 4.

  A rear pillar portion 9 extending obliquely upward from the vicinity of the rear wheel house portion 6 is provided above the rear wheel house portion 6 in the side wall portion 3, and in front of the rear pillar portion 9 in the side wall portion 3. An opening 10 for passengers is provided, and a side window opening 11 is provided behind the rear pillar 9. A roof rail portion 13 is provided at the upper end of the side wall portion 3 so as to extend from a pillar portion (not shown) positioned most forward of the vehicle body to a pillar portion 12 positioned most rearward of the vehicle body. 13 is connected to the end of the roof portion 5 in the vehicle width direction.

  Next, the structure of the side wall portion 3 and the like will be described in detail. As shown in FIGS. 2 and 3, the side wall portion 3 is configured as a hollow body by an inner panel 21 and an outer panel 22, and the inside Is provided with a rear pillar reinforcement 23 (hereinafter referred to as “rear pillar rain 23”). As shown in FIGS. 2 and 3, the rear pillar rain 23 has a flange 23 a at the lower end joined to a substantially central portion in the vehicle width direction of the bulging portion 21 a that bulges toward the outer panel 22 at the lower portion of the inner panel 21. As shown in FIG. 1, it extends in a substantially vertical direction while being inclined toward the front side of the vehicle body toward the rear pillar portion 9, and the upper end portion is joined to the roof rail portion 13 through the rear pillar portion 9. In addition, joining means the coupling | bonding by welding etc., and is used by the same meaning hereafter.

  Further, as shown in FIG. 1, the rear pillar rain 23 has a cross-sectional hat shape having a bulging portion 23b bulging toward the outer panel 22 and flanges 23c and 23d at the front end portion and the rear end portion. The flanges 23c and 23d are joined to the inner panel 21 to form a closed cross section.

  As shown in FIG. 4, in the rear pillar portion 9, the front end portion and the rear end portion of the inner panel 21, the outer panel 22, and the rear pillar rain 23 are superposed to form a triple structure. A closed cross section is formed. In addition, superposition | polymerization means the coupling | bonding by welding etc. similarly to joining, and is used by the same meaning hereafter.

  Further, as shown in FIG. 1, the rear pillar rain 23 extends along the front edge 11a and the lower edge 11b of the side window opening 11, and the portion along the front edge 11a is shown in FIG. As described above, the inner panel 21, the outer panel 22, and the rear pillar rain 23 are superposed in a triple manner as described above, and the inner panel 21 and the outer panel are also formed in the portion along the lower edge 11b as shown in FIG. 22 and the rear pillar rain 23 are polymerized in triplicate. According to this, the rigidity of the corner portion 3a (see FIG. 1) where the front end edge portion 11a and the lower end edge portion 11b intersect in the side wall portion 3 is improved.

  The rear wheel house part 6 has the rear wheel panel 24 in which the bulging part 24a to the vehicle interior side was formed, as shown in FIGS. A flange 24b is formed around the bulging portion 42a of the rear wheel panel 24, and the flange 24b is joined to the lower portion of the vertical surface portion 21b of the inner panel 21 as shown in FIGS. Yes.

As shown in FIG. 1, the rear wall portion 4 includes an end inner panel 61 and an end outer panel (not shown), and flanges of the panels are joined to each other at the end portion along the opening 8.
As shown in FIGS. 1 and 2, the floor portion 2 includes a flat floor panel 31. A frame member 32 extending in the front-rear direction of the vehicle body is joined below the end of the floor panel 31 on the side wall 3 side. The floor panel 31 has a flange 31a at the end on the side wall 3 side, and the flange 31a is superposed on the side surface of the bulging portion 24a of the rear wheel panel 24 via the vertical surface portion 32a of the frame member.

  As shown in FIG. 1, between the left and right rear wheel house parts 6, it extends in the vehicle width direction along the upper surfaces of both rear wheel house parts 6 and the floor part 2, and both ends thereof are the left and right rear wheel house parts 6. Reinforcing member 40 reaching the upper part is provided. The reinforcing member 40 is U-shaped when viewed from the rear (or front) side of the vehicle body, and includes left and right upper wheel house reinforcements 41 (hereinafter referred to as “upper rain 41”) and a lower wheel house reinforcement. Ment 42 (hereinafter, “lower rain 42”) and upper cross member 43, which will be described below.

  First, as shown in FIGS. 1 to 3, the upper rain 41 is disposed on the upper portion of the rear wheel panel 24, and a bulging portion 41 a that bulges from the upper portion to the lower portion toward the vehicle body inner side. Are provided with flanges 41b, 41c, 41c, 41d, and 41d, and have a cross-sectional hat shape. The flange 41b is joined to the vertical surface portion 21b of the inner panel 21, the flanges 41c and 41c are joined to the upper surface of the bulged portion 24a of the rear wheel panel 24, and the flanges 41d and 41d are bulged portion 24a of the rear wheel panel 24. As shown in FIG. 2, a closed section is formed by the bulging portion 41 a and the bulging portion 24 a of the rear wheel panel 24.

  The lower rain 42 connects the upper rain 41 and the floor panel 31, is disposed below the upper rain 41, and has a bulging portion 42 a that bulges inward in the vehicle body at a substantially central portion in the width direction. It has flanges 42b, 42b provided on both sides in the width direction, and has a cross-sectional hat shape. Then, with the lower part of the bulging part 41 a of the upper rain 41 and the upper part of the bulging part 42 a of the lower rain 42 fitted together, the upper parts of the flanges 42 b and 42 b are placed below the flanges 41 d and 41 d of the upper rain 41. While being joined, the lower portions of the flanges 42 a and 42 a are joined to the upper surface of the floor panel 31.

  The upper cross member 43 connects the left and right lower rains 42, has a bulging portion 43a that extends in the vehicle width direction along the upper surface of the floor panel 31 and bulges upward, and flanges 43b and 43b. The cross section is hat-shaped. The flanges 43b and 43b are joined to the upper surface of the floor panel 31, and the upper cross member 43 and the floor panel 31 form a closed cross section. Further, at both ends in the vehicle width direction of the upper cross member 43, the end portions in the vehicle width direction of the bulging portion 43a of the upper cross member and the lower portion of the bulging portion 42a of the lower rain 42 are joined together. ing.

  As shown in FIG. 5, a floor cross member 44 extending in the vehicle width direction is disposed on the lower surface of the floor panel 31. The floor cross member 44 has a bulging portion 44a that bulges downward, and flanges 44b and 44b, and has a hat shape in cross section. The flanges 44b and 44b are joined to the lower surface of the floor panel 31, and the floor cross member 44 and the floor panel 31 form a closed cross section. The vehicle body front side flange 43 b of the upper cross member 43 and the vehicle body rear side flange 44 b of the floor cross member 44 are superposed via the floor panel 31.

  Returning to FIG. 1, a connecting gusset 51 extending obliquely upward along the side wall portion 3 from the upper portion of the rear wheel house 6 toward the peripheral portion 4 a of the opening 8 in the vehicle body rear wall 4 is provided at the rear of the rear wheel house 6. It is arranged. The connection gusset 51 is a plate member having a substantially rectangular shape in plan view, and includes a flat surface portion 51a and flanges 51b, 51c, 51d, and 51e formed by bending the flat plate portion 51a. Then, the side flange 51b on the side wall 3 side is joined to the inner panel 21 on the side wall 3, the side flange 51c on the rear wall 4 side is joined to the inner panel 61 on the rear wall 4, and the rear wheel. A flange 51d on the side of the house portion 6 is joined to the upper surface of the bulging portion 24a of the rear wheel panel 24. The flange 51e on the side opposite to the side wall 3 is intended to improve the rigidity of the connecting gusset 51, and is bent downward unlike the other flanges 51b, 51c, 51d.

  Further, an extension 51f is provided on the side of the connecting gusset 51 on the rear wheel house 6 side, and the extension 51f is joined to the upper surface of the bulging portion 41a of the upper rain 41 so as to connect the connecting gusset 51 and the upper gusset 51. In 41 is connected. Therefore, in this connection part, the rear wheel panel 24, the upper rain 41, and the connection gusset 51 are superposed in a triple manner. A suspension device for the rear wheel is attached by inserting and fastening a bolt and nut member into a hole H provided in the overlapping portion.

  Next, the effect | action which concerns on this Embodiment is demonstrated.

  First, from the viewpoint of reinforcing the rear part of the vehicle body, since the reinforcing member 40 has a U-shaped structure between the left and right rear wheel house parts 6, the left and right side wall parts 3 are less likely to bend to the side of the vehicle body, and the connecting gusset Since 51 and the reinforcing member 40 are connected at the upper part of the rear wheel house portion 6, the rigidity of the opening peripheral portion 4a in the rear wall portion 4 is improved, and as a result, the torsional rigidity of the entire rear portion of the vehicle body is improved. Further, since the reinforcing member 40 is provided along the upper surfaces of the rear wheel house portion 6 and the floor portion 2, the reinforcing member 40 does not impair the indoor space at the rear of the vehicle body.

  Further, since the connecting gusset 51 extends obliquely upward from the rear wheel house portion 6 toward the opening peripheral portion 4a in the rear wall portion 4, it is possible to widen the range of high rigidity to a higher position in the rear wall portion 4. it can.

  Furthermore, the reinforcing member 40 has a cross-sectional hat shape having a flange, and the flange is joined to the upper surface of the floor portion 2 to form a closed cross section between the reinforcing member 40 and the floor portion 2. The rigidity of the part 2 is improved, and consequently the rigidity of the rear part of the vehicle body is improved.

  And since the reinforcement member 40 and the connection gusset 51 are connected by the attachment part of the suspension apparatus in the upper part of the rear wheel house part 6, in this connection part, the reinforcement member 40, the connection gusset 51, and the wheel house panel 24 are connected. As a result, a triple structure is obtained, the rigidity is improved, and the load of the vehicle body and the like transmitted from the suspension can be reliably supported.

  Next, from the viewpoint of dispersion of the vehicle body load transmitted from the suspension to the rear wheel house part 6, the load is transmitted from the upper part of the rear wheel house part 6 through the connecting gusset 51 to the peripheral part of the opening in the rear wall part 4. 4 a, and also to the side wall portion 3 including the rear pillar portion 9 through the rear pillar rain 23. That is, the load can be effectively distributed over a wide range at the rear of the vehicle body.

  In that case, the opening peripheral part 4a in the rear pillar part 9 and the rear wall part 4 is formed by joining a plurality of panel members, and is very rigid, so that it can effectively receive the dispersed load. Can do.

  Further, the rear pillar rain 23 has a wider area in the side wall portion 3 than the case where the load transmitted to the rear wheel house portion 6 is not inclined because the upper portion is inclined toward the front side of the vehicle body. It is possible to effectively disperse the wheel house portion 6 to the front side of the vehicle body.

  Since the rear pillar rain 23 extends along the front edge 11a and the lower edge 11b of the side window opening 11, the side window opening 11 is most often used when the side window opening 11 is provided. The vicinity of the corner portion 3a where the front end edge portion 11a and the lower end edge portion 11b of the opening 11 cross close to the suspension and stress is likely to concentrate is reinforced, and the rigidity of the side wall portion 3 is improved.

  Furthermore, since the rear pillar rain 24 is connected to the roof rail portion 13, the load transmitted to the rear wheel house portion 6 can be distributed to the roof portion 5 via the roof rail portion 13.

  Moreover, since the connection gusset 51 is joined to the side wall part 3 between the upper part of the rear wheel house part 6 and the opening peripheral part 4a in the rear wall part 4, the load input to the rear wheel house part 6 is It can also be dispersed in the side wall portion 3 behind the rear wheel house portion 6.

  Further, since the connecting gusset 51 extends obliquely upward from the upper part of the rear wheel house part 6 toward the rear wall part 4, the connecting gusset extends substantially horizontally rearward in the load transmitted to the rear wheel house part 6. It is possible to effectively disperse the rear portion of the side wall portion 3 relative to the rear wheel house portion 6 rather than the case where the side wall portion 3 is. That is, in the rear part of the rear wheel house part 6 in the side wall part 3, due to the large area of the rear wheel house part 6 itself, the above load is applied in a range substantially equal to or less than the rear wheel house part 6. Although a sufficient area for dispersion cannot be secured, according to the present embodiment, the connecting gusset 51 extends obliquely upward from the upper portion of the rear wheel house portion 6 toward the rear wall portion 4, and therefore the rear wheel house portion. The load can be transmitted and distributed to a portion having a larger area at the rear of 6.

  Further, since the reinforcing member 40 that connects the upper portion of the rear wheel house portion 6 and the floor portion 2 in the substantially vertical direction of the vehicle is provided, the load transmitted to the rear wheel house portion 6 is transmitted via the reinforcing member 40. It can also be distributed to the floor portion 2. At this time, the connecting gusset 51, the rear pillar rain 23, and the reinforcing member 40 realize a Y-shaped reinforcing structure, so that the load input to the rear wheel house 6 is evenly distributed to each part of the rear vehicle body. be able to.

  Further, since the vehicle body front side flange 43b of the upper cross member 43 of the reinforcing member 40 and the vehicle body rear side flange 44b of the floor cross member 44 are overlapped via the floor panel 31, a load applied to the reinforcing member 40 from the suspension is applied. Compared to the case where the upper cross member 43 and the front and rear flanges 43b, 43b, 44b, 44b can be overlapped and joined to each other, the floor portion 2 can be reinforced. The range can be expanded in the longitudinal direction of the vehicle body, and workability such as welding can be improved by reducing the number of triple-structured portions.

  In the above embodiment, the lower rain 42 of the reinforcing member 40 extends to the lower part of the upper rains 41, 41. However, the lower rain 42 may be as follows. That is, as shown in FIG. 6, the upper end portion of the lower rain 142 having a cross-sectional hat shape having a bulging portion 142 a extending from the upper end portion to the lower end portion and a flange 142 b is used as the bulging portion 141 a of the upper rain 141 of the reinforcing member 140. And an extension 142c extending to the lower portion of the extension 151f of the connecting gusset 151, and as shown in FIG. 7, the extension 151f of the connecting gusset 151, the extension 142c of the lower rain 142, and the upper rain 141d are provided. And the upper part of the bulging part 124a of the rear wheel panel 124 is superposed four times, and the suspension device is fixed by inserting and fastening a bolt and nut member into a hole H 'provided in the superposed part. According to this, the rigidity of the fixing portion of the suspension device is further improved. Further, a continuous closed cross section from the floor portion 102 to the upper portion of the rear wheel house portion 106 is formed by the upper surface portion of the bulging portion 124a of the rear wheel panel 124 and the lower rain 142, and the torsional rigidity of the rear portion of the vehicle body is further improved. It will be.

  In the present embodiment, when the flange 43b of the upper cross member 43 and the flange 44b of the floor cross member 44 are overlapped via the floor member 31, the vehicle body front side flange 43b of the upper cross member 43 and the floor cross Although the vehicle body rear side flange 44b of the member 44 is overlapped, the vehicle body rear side flange 43b of the upper cross member 43 and the vehicle body rear side flange 44b of the floor cross member 44 may be overlapped.

  The present invention can be widely applied to a rear body structure of a vehicle in which an opening is provided in the rear wall of the vehicle body.

1 is an overall perspective view of a rear body of a vehicle according to an embodiment of the present invention seen through obliquely from the front side of the vehicle body. It is AA arrow sectional drawing of FIG. It is a BB arrow directional cross-sectional view of FIG. It is CC sectional view taken on the line of FIG. It is DD sectional view taken on the line in FIG. FIG. 5 is an overall perspective view of a rear body of a vehicle according to another embodiment of the present invention seen through from the obliquely upper front side of the vehicle body. FIG. 7 is a cross-sectional view taken along line EE in FIG. 6.

Explanation of symbols

1 Vehicle 2 Floor 3 Side Wall (Body Side)
4 Rear wall (car body rear wall)
4a Opening peripheral part in the rear wall (opening peripheral part in the vehicle rear wall)
5 Roof (roof)
6 Rear wheel house (Rear wheel house)
7 Back door 8 Opening 9 Rear pillar (pillar)
11 Side window opening (window opening)
11a Front edge 11b Lower edge 13 Roof rail 23 Rear pillar rain (reinforcement member)
40 Reinforcement member (wheel house reinforcement member)
51 Connection gusset (connection member)

Claims (1)

A vehicle body rear wall having an opening and bulging inward from the vehicle body side wall at a predetermined distance from the vehicle body rear wall to the vehicle body front side, and a suspension device mounting portion is provided above the bulge portion. A rear wheel house, a rear member joined to the rear wall of the vehicle body, a side member in the vehicle width direction joined to the rear wheel house, and provided on the side wall of the vehicle body. And a rear pillar body having an upper end joined to the roof rail part, wherein the rear wall of the vehicle body joins the flanges of the inner panel and the outer panel at the end along the opening. These panels extend upward from the lower part of the rear wall of the vehicle body to the rear end of the roof rail part, and the upper part forms the rearmost pillar part of the vehicle body. A load transmission member which extends obliquely upward outward in the vehicle width direction from the vicinity mounting portion of the top of the suspension device of the wheel house toward the rear pillar portion, a front portion of the load transmission member in the vicinity mounting portion of the suspension system It is disposed along the bulging portion of the rear wheel house at a portion spaced from the lower end of the portion extending obliquely upward to the floor member side, and extends rearward toward the inner panel in the peripheral portion of the opening in the rear wall of the vehicle body. rear vehicle body structure of a vehicle, characterized by connecting a member, are provided.

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