JP2008162297A - Vehicle body structure for vehicle rear part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body structure for a vehicle rear part capable of making suppression of weight increase of the vehicle body and insurance of rigidity at high-dimension compatible. <P>SOLUTION: A brace body 24 vertically extending and forming a closed cross section shape with a wheel house inner 5 is joined to a wheel house 4, and an upper surface opening of the brace body 24 is joined to a rear shelf 31 arranged so as to be extended in a vehicle width direction. The brace closed cross section part and the rear shelf closed cross section part are connected and an area of a horizontal cross section of the brace body 24 is broadened toward the upper surface opening. A connection area of the rear shelf 31 is ensured by the brace body 24 having the minimum size suppressed with stress distribution to sufficiently enhance the rigidity of the wheel house 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle body structure at the rear of a vehicle provided with a rear wheel house and a rear shelf.

  A rear wheel house is disposed inside a vehicle (for example, a passenger compartment) at the rear of a vehicle, for example, a passenger car, and various structures for preventing deformation and securing strength of the inner panel and the outer panel of the rear wheel house are employed. (For example, refer to Patent Document 1 and Patent Document 2 below).

  In the structure proposed in Patent Document 1, a side stay having a closed cross section extending along the strut house is joined to a side portion of the wheel house to prevent deformation of the inner panel and outer panel of the rear wheel house and to ensure strength. To increase rigidity. In addition, the structure proposed in Patent Document 2 joins the inner panel of the rear wheel house and the inner panel of the rear quarter panel with a corner bracket having a closed cross section, and mainly prevents deformation of the upper part of the rear wheel house. Strength is secured by securing strength.

  On the other hand, a vehicle is known in which a rear shelf extending in the vehicle width direction is disposed at the upper portion of the rear wheel house, and the structural rigidity of the vehicle body is secured by the rear shelf. In a vehicle in which a strut house is provided integrally with a rear wheel house, by joining the top of the strut house to the rear shelf, the input from the strut house is distributed to the rear shelf to ensure the overall rigidity (for example, See Patent Document 3 below).

Japanese Utility Model Publication No. 5-78674 Japanese Utility Model Publication No. 5-78675 Japanese Utility Model Publication No. 63-69679

  In recent years, a vehicle capable of responding to various purposes of use has been demanded in accordance with a change in lifestyle, diversification of values, and the like, and there are various demands for the vehicle. While demands on ride comfort, comfort, and fuel efficiency are emphasized, demands on driving performance are also emphasized, and vehicles that satisfy demands at a high level are also demanded for conflicting demands. With regard to the vehicle body reinforcement structure, it is possible to secure high-dimensional rigidity to stabilize the riding comfort while driving while suppressing the increase in the weight of the vehicle body and the expansion of space due to the reinforcing members in order to improve the riding comfort and comfort. Is a required situation.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle body structure at the rear of the vehicle that can achieve both suppression of weight increase of the vehicle body and securing of high-dimensional rigidity.

  In order to achieve the above object, a vehicle body structure of a vehicle rear portion of the present invention according to claim 1 is provided on the inner side in the vehicle width direction of the rear wheel of the vehicle, and a rear wheel house inner whose upper portion is curved outward in the vehicle width direction, A brace that is joined to an inner side surface in the vehicle width direction of the rear wheel house inner, extends vertically along the inner side surface, and forms a brace closed cross section with a horizontal cross section that is a closed cross section together with the rear wheel house inner; and A vehicle body structure of a rear portion of the vehicle including a rear shelf that extends in the vehicle width direction above the brace, is joined to a lower surface of the rear shelf, extends in the vehicle width direction along the rear shelf, A cross member member that forms a rear shelf closed cross-section with a cross-section perpendicular to the vehicle width direction together with the rear shelf, and an end of the cross member member Wherein by joining an upper end of the brace and, characterized in that it is configured to couple the said brace closed-section portion and the rear shelf closed-section portion.

  In the first aspect of the present invention, the closed section forming member forms a closed section on the rear shelf, and the end of the closed section forming member and the upper end of the brace are coupled to each other so that the rear shelf closed section and the brace are closed. It becomes possible to connect and form the cross-sectional portion, and high-dimensional vehicle body rigidity can be ensured by the connection of the closed cross-sectional shape. This is particularly effective in securing rigidity against torsion of the vehicle body.

  According to a second aspect of the present invention, the rear vehicle body structure of the present invention is the rear vehicle body structure according to the first aspect, wherein the brace closed cross-sectional portion has a horizontal cross-sectional area that increases upward. It is characterized by being.

  In the present invention according to claim 2, it is possible to sufficiently increase the rigidity by securing the connection area with the rear shelf by the brace having the minimum size in which the stress distribution is suppressed. For this reason, it becomes the vehicle body structure of the vehicle rear part which can make the suppression of the weight increase of a vehicle body and the rigidity ensuring in a high dimension compatible.

  According to a third aspect of the present invention, the rear vehicle body structure of the present invention is the rear vehicle body structure according to the first or second aspect, wherein the upper portion of the brace is curved inward in the vehicle width direction. Features.

  In the present invention according to claim 3, since the upper portion of the brace is curved inward in the vehicle width direction, the connecting portion between the upper end portion of the brace and the end portion of the cross member member becomes smooth to ensure the connecting rigidity. And the connection rigidity of the closed cross-sectional shape can be sufficiently increased.

  According to a fourth aspect of the present invention, the rear vehicle body structure of the present invention is the rear vehicle body structure of the third aspect, wherein a bulkhead is joined to the upper end of the brace.

  In the present invention according to claim 4, since the bulkhead is interposed, the brace can be joined to the rear shelf by being connected to the rear shelf closed cross section while ensuring the strength of the brace closed cross section.

  A vehicle body structure of a vehicle rear portion according to the present invention according to claim 5 is the vehicle body structure of the vehicle rear portion according to any one of claims 1 to 4, wherein the lower portion of the rear wheel house inner A suspension support portion that supports an upper portion of a suspension device of a vehicle is disposed, and a lower portion of the brace is joined to the suspension support portion.

  In the present invention according to claim 5, since the lower portion of the brace is joined to the suspension support portion, the input from the suspension device to the vehicle body can be distributed to the rear shelf.

  According to a sixth aspect of the present invention, there is provided a vehicle rear body structure of the present invention according to any one of the first to fifth aspects, wherein the brace is attached to the side member extending in the front-rear direction of the vehicle. The lower end of is joined.

  In the present invention according to claim 6, since the lower end of the brace is joined to the side member, the input from the rear wheel house inner can be distributed to the rear shelf and the side member.

  The vehicle body structure of the vehicle rear portion according to the present invention according to claim 7 is the vehicle body structure of the vehicle rear portion according to any one of claims 1 to 6, wherein the brace includes the upper end of the brace. A reinforcing part is provided in a part having a smaller cross-sectional area than the brace closed cross-sectional part.

  In this invention concerning Claim 7, the reinforcement condition of a brace can be arbitrarily set in a reinforcement part.

  According to an eighth aspect of the present invention, the rear vehicle body structure of the present invention is the rear vehicle body structure of the seventh aspect, wherein the reinforcing portion is a phosphorus hose that covers the outer side of the brace. .

  In this invention which concerns on Claim 8, a reinforcement | strengthening condition can be arbitrarily set easily by putting a phosphorus hose on the outer side of the brace of a desired part.

  Further, the vehicle body structure of the rear part of the vehicle according to claim 9 is the vehicle body structure of the rear part of the vehicle according to claim 7, wherein the reinforcing portion is configured such that the brace division members divided in the vertical direction are connected to each other to form the brace. It is formed by doing.

  In the present invention according to claim 9, by setting the brace divided material of a desired part to a required strength, the reinforcing state can be arbitrarily set arbitrarily.

  The vehicle body structure of the rear part of the vehicle according to the present invention is a vehicle body structure capable of satisfying both suppression of increase in weight of the vehicle body and securing of high-dimensional rigidity.

  A first embodiment will be described.

  1 is a perspective view showing a vehicle body structure at the rear of a vehicle according to the first embodiment of the present invention, FIG. 2 is a situation in the direction of arrow II in FIG. 1, FIG. 3 is an exploded situation in FIG. 2 is a cross-sectional view taken along line IV-IV in FIG. 2, FIG. 5 is a detail of an arrow V portion in FIG. 4, FIG. 6 is a perspective view showing a brace attached state, and FIG. 7 is a direction of arrow VII in FIG. FIG. 8 shows details of the rear shelf portion from the vehicle front side, FIG. 9 shows a cross section taken along line IX-IX in FIG. 8, and FIG. 10 shows a cross section taken along line XX in FIG.

  As shown in FIGS. 1 to 5, the vehicle body structure at the rear of the vehicle is arranged so as to cover a side member lower 2 having a hat-shaped cross section as a side member 1 extending in the front-rear direction and an upper surface opening of the side member lower 2. Further, a wheel house inner 5 constituting a wheel house 4 (rear wheel house) for accommodating a rear wheel and a wheel house inner (rear wheel) are arranged at the left and right ends of the floor panel 3. A quarter inner 6 joined to the outside of the house inner 5 is disposed. As for quarter inner 6, the lower part constitutes the outer side of wheel house 4, and the upper part constitutes the inner side of rear pillar 7. The wheel house inner 5 of the wheel house 4 has a shape that bulges toward the vehicle compartment (cargo compartment) side of the vehicle (that is, the upper portion is curved outward in the vehicle width direction), and the outer side of the vehicle compartment of the wheel house inner 5. A rear wheel (not shown) is accommodated in the housing.

  A concave opening 8 is formed in the lower central part of the wall surface of the wheel house inner 5 of the wheel house 4, and a spring house 9 (suspension support part) is joined below the opening 8. The spring house 9 is configured by joining a spring house panel 10 and a spring house bracket 11. The upper part of the suspension device (shock absorber or spring member) is supported by the spring house bracket 11, and the spring house panel 10 is joined to the wall surface of the wheel house inner 5.

  Further, a recess 12 into which the spring house bracket 11 is fitted is formed on the vehicle outer side of the floor panel 3, and the spring house bracket 11 is joined to the vertical wall of the side member lower 2 at a position corresponding to the recess 12. The spring house 9 is joined to the side member 1 (refer mainly to FIGS. 4 and 5).

  On the other hand, a hat-shaped cross-section phosphorus hose 21 is arranged at the opening 8 portion of the wheel house 4, and the side edge 21 a of the phosphorus hose 21 covers the opening 8 inside the cross-section of the phosphorus hose 21. 5 is joined to the wall surface. Further, the lower edge portion 21b of the phosphorus hose 21 is joined to the vertical wall of the side member lower 2 while being sandwiched between the wall portions of the spring house bracket 11 (see FIG. 5). That is, the lower part of the phosphorus hose 21 is joined to the side member 1 and the spring house 9.

  The lower edge of the brace body 24 having a hat-shaped cross-section that is continuous with the cross-sectional shape of the phosphorus hose 21 is joined to the upper edge of the phosphorus hose 21, and the area of the cross-sectional shape of the brace body 24 (horizontal cross-sectional area) is wide toward the upper opening. It has become. The brace body 24 is composed of a front brace 25 and a rear brace 26 that are divided into two in the longitudinal direction of the vehicle. The surface edge 25a of the front brace 25 and the surface edge 26a of the rear brace 26 are the surfaces that form the bottom surface of the hat-shaped cross section. Are overlapped and joined to each other.

  And the vertical edge of the side part of the front brace 25 and the vertical edge of the side part of the rear brace 26 are formed in the curved shape along the bulging shape of the wheel house 4, and the side edge part which continues to the vertical edge of the front brace 25 25b and the side edge part 26b which continues to the vertical edge of the rear brace 26 are joined to the wall surface of the wheel house inner 5 of the wheel house 4, and the brace body 24 is joined to the wheel house 4.

  In other words, the brace is constituted by the phosphorus hose 21 and the brace body 24, the brace is welded to the inner surface in the vehicle width direction of the wheel house inner 5 and extends vertically, and the brace is closed along with the wheel house inner 5 so that the horizontal section becomes a closed section. A cross section is formed and joined to the wheel house 4. The lower end of the brace (the lower part of the phosphorus hose 21) is joined to the side member 1 and the spring house 9.

  In addition, although the brace was comprised by the phosphorus hose 21 and the brace main body 24, it is also possible to comprise a brace only by the brace main body 24. FIG. In addition, the brace body 24 is composed of a front brace 25 and a rear brace 26 to facilitate the processing of the members. However, if drawing is possible, the shape in which the cross-sectional area widens upward in one hat-shaped cross section. It is also possible to use other braces. Further, by appropriately setting the vertical overlap of the phosphorus hose 21 and the brace body 24 (by covering in an appropriate state), it is possible to arbitrarily set the reinforcement of the part of the wheel house 4.

  As shown in FIGS. 6 and 7, the brace body 24 has a cross-sectional area that increases toward the upper opening, and the above-mentioned brace closed cross-sectional portion has a horizontal cross-sectional area that increases upward. In other words, with respect to the cross-sectional area S (shown by a dotted line in the drawing) corresponding to the wall surface of the wheel house inner 5 of the wheel house 4 of the brace body 24 (indicated by a dotted line in the drawing), The facing area is gradually expanded in the front-rear direction and the left-right direction of the vehicle, and the upper portion of the brace body 24 (brace) is curved inward in the vehicle width direction. The brace body 24 (phosphorus hose 21) has a bag structure surrounded by a hat-shaped cross-sectional shape, a wall surface of the wheel house inner 5, and a spring house bracket 11 (see FIGS. 3 and 4).

  An upper surface edge 26 c is formed at the upper opening of the rear brace 26 of the brace body 24, and the upper edge of the front brace 25 and the upper surface edge 26 c of the rear brace 26 are joined to the rear shelf 31. The front brace 25 and the rear brace 26 ensure the strength of the wheel house 4, and the front brace 25 and the rear brace 26 function as a reinforcing member for a seat back of a rear seat (not shown).

  As shown in FIGS. 1 to 4 and 8 to 10, a rear shelf 31 extending in the vehicle width direction is disposed above the wheel house 4, and both ends of the rear shelf 31 are located above the left and right wheel houses 4. The torsional rigidity of the vehicle body is ensured by being joined to the vehicle body wall surface. The end of the rear shelf 31 is composed of a rear shelf upper brace 32 as a plate member and a bulkhead brace 33 (bulkhead) as a cross member member. As shown in FIG. The front edge 33a of the bulkhead brace 33 is joined to the inner side of the edge 32a that extends in the vehicle width direction on the front side.

  Further, as shown in FIG. 10, the upper edge of the front brace 25 of the brace body 24 is joined to the joint portion between the edge portion 32 a of the rear shelf upper brace 32 and the edge portion 33 a of the bulkhead brace 33. Further, the upper edge 26c of the rear brace 26 of the brace body 24 is joined to the rear edge of the rear shelf upper brace 32 of the vehicle, and the rear edge of the bulkhead brace 33 is joined to the middle part of the rear brace 26. The part 33b is joined.

  That is, the opening of the upper part of the brace body 24 is joined to the bulkhead brace 33, so that the upper part of the brace body 24 is joined to the lower side of the rear shelf 31. Then, the upper edge 26c of the rear brace 26 is joined to the edge of the rear shelf upper brace 32, and the edge 33b of the bulkhead brace 33 is joined to the middle part of the rear brace 26, so that the rear shelf upper brace is joined. 32 parts are closed by the upper part of the rear brace 26 and the bulkhead brace 33. That is, the closed cross-sectional shape of the rear shelf 31 is continued at the joint portion of the upper surface opening of the brace body 24 (brace).

  As shown in FIGS. 3 and 9, the rear shelf 31 positioned between both ends to which the upper part of the brace body 24 is joined is a cross extending in the vehicle width direction below the rear shelf panel 35 extending in the vehicle width direction. The edge of the rear shelf extension 36 as a member member is joined, and the rear shelf panel 35 and the rear shelf closed cross section whose cross section perpendicular to the vehicle width direction is a closed cross section.

  As shown in FIGS. 9 and 10, the shape of the rear shelf panel 35 is continuous with the shape of the rear shelf upper brace 32 in the vehicle width direction, and the shape of the rear shelf extension 36 is the upper portion of the rear brace 26, the bulkhead brace 33, and the like. It is continuous in the shape formed by. Thereby, the closed cross-sectional shape of the rear shelf 31 is continuously formed to both ends, and the upper part of the brace body 24 is joined to the continuous closed cross-sectional shape portion while maintaining the bag structure.

  That is, the end portion of the rear shelf extension 36 and the upper end portion of the brace body 24 (brace) are coupled, and the brace closed section and the rear shelf closed section described above are coupled.

  In the vehicle body structure at the rear portion of the vehicle having the above-described configuration, the brace body 24 and the phosphorus hose 21 that extend vertically and form a closed cross-sectional shape with the wheel house 4 are joined to the wheel house inner 5 of the wheel house 4. The upper opening is joined to a rear shelf 31 extending in the vehicle width direction. For this reason, the wheel house 4 can be reinforced by the brace body 24, the phosphorus hose 21 and the rear shelf 31.

  And since the cross-sectional shape of the brace body 24 is widened toward the upper surface opening, that is, since the upper part of the brace body 24 is curved inward in the vehicle width direction, a large joint area with the rear shelf 31 is secured, The torsional rigidity of the vehicle body can be improved. Further, the area of the lower cross-sectional shape of the lower side of the brace body 24 is minimized, and the connecting portion between the upper end portion of the brace body 24 and the end portion of the rear shelf extension 36 of the rear shelf 31 is smoothly connected. The rigidity can be ensured, and the connection rigidity of the closed cross-sectional shape can be sufficiently increased. For this reason, without sacrificing the volume in the vehicle compartment (loading chamber) at the rear of the vehicle, the rigidity can be ensured by the brace that suppresses the stress distribution by minimizing the increase in weight.

  The rear shelf 31 where the upper surface opening of the brace body 24 is joined is a rear shelf upper brace 32, and the upper surface opening of the brace body 24 is connected to the rear shelf upper via a bulkhead brace 33 continuous to the rear shelf extension 36. Since it is joined to the brace 32, the brace body 24 can be joined with the closed cross-sectional shape of the rear shelf 31 being continuous.

  In other words, the rear shelf extension 36 which is a closed section forming member forms a closed section in the rear shelf 31 and the bulkhead brace 33 and the brace body 24 at the end of the rear shelf extension 36 are coupled to each other, thereby the rear shelf closed section. And the brace closed cross section can be connected to each other. Due to the connection of the closed cross-sectional shape, the vehicle body rigidity can be ensured in a high dimension. In particular, it is effective for securing rigidity against torsion of the vehicle body. Therefore, the bag structure of the brace body 24 can be secured and the closed cross-sectional shape of the rear shelf 31 can be continued without increasing the number of parts, and the rigidity secured by the rear shelf 31 of the peripheral structure can be improved.

  Further, since the bulkhead brace 33 is interposed, the brace body 24 (brace) can be joined to the rear shelf 31 by connecting to the rear shelf closed cross section while ensuring the strength of the brace closed cross section. .

  Further, since the lower portion of the brace body 24 is joined to the wheel house 4 via the phosphorus hose 21, the input from the suspension device can be distributed to the rear shelf 31, and particularly the strength can be ensured without increasing the weight. The necessary reinforcement in the vicinity of the spring house 9 can be carried out. Further, since the lower part of the brace body 24 is joined to the side member 1, the input from the wheel house inner 5 can be distributed to the rear shelf 31 and the side member 1.

  In addition, as a reinforcement part having a cross-sectional area narrower than the upper surface opening of the brace body 24, the phosphorus hose 21 and the brace body 24 can be overlapped in the vertical direction, and the spring house 9 of the wheel house 4 having a high demand for reinforcement. The reinforcing state by the brace body 24 in the vicinity of can be arbitrarily set.

  In addition, by connecting the brace division materials divided in the vertical direction to each other to configure the brace body, the plate thickness of the brace division material can be set to a desired value, and the reinforcement only for the necessary portions is supplemented. The reinforcement situation can be set arbitrarily. Moreover, it is also possible to raise the rigidity of a required site | part by superimposing a brace division material as needed.

  Therefore, the above-described vehicle body structure is a vehicle body structure that can achieve both suppression of weight increase of the vehicle body and securing of high-dimensional rigidity.

  The fitting order in the vehicle body structure described above is not limited by the joining mode (spot welding, continuous welding) or the like. For example, the end portion of the rear shelf 31 and the brace main body 24 are sub members as the upper member. The side member 1, the spring house 9, and the phosphorus hose 21 are assembled as sub members as sub members.

  A second embodiment will be described.

  FIG. 11 is a perspective view showing the vehicle body structure of the rear part of the vehicle according to the second embodiment of the present invention, FIG. 12 is an exploded view of FIG. 1, FIG. 13 is a situation in the direction of arrow XIII in FIG. The XIV-XIV line arrow view in FIG. 13 is shown. Since the second embodiment is an example in which the configuration of the spring house is different, the same members and the same function members as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  A concave opening 51 is formed at the center of the wall surface of the wheel house inner 5 of the wheel house 4, and a spring house 52 (suspension support part) is joined to the opening 51 in a state of protruding toward the vehicle compartment (loading room) side. ing. The spring house 52 includes a spring house cylinder 53 and a spring house bracket 54 joined to the upper opening of the spring house cylinder 53. The upper part of the suspension device (shock absorber or spring member) is supported by the spring house bracket 54, and the spring house cylinder 53 is joined to the wall surface of the wheel house inner 5. A spring house lower 55 is joined to the lower part of the spring house cylinder 53.

  Further, a recess 12 into which the spring house lower 55 is fitted is formed on the vehicle outer side of the floor panel 3, and the spring house lower 55 is joined to the vertical wall of the side member lower 2 at a position corresponding to the recess 12. The spring house 52 is joined to the side member 1 (see FIG. 14).

  On the other hand, a hat-shaped cross-section phosphorus hose 57 is disposed at the opening 51 portion of the wheel house 4, and the side edge 57 a of the phosphorus hose 57 covers the opening 51 inside the cross-section of the phosphorus hose 57. 5 is joined to the wall surface. Further, the lower edge portion 57 b of the phosphorus hose 57 is joined to the peripheral edge of the spring house bracket 54.

  The lower edge of the hat-shaped cross-sectional brace body 58 that is continuous with the cross-sectional shape of the phosphorus hose 57 is joined to the upper edge of the phosphorus hose 57, and the area of the cross-sectional shape of the brace body 58 becomes wider toward the upper opening. The upper part of the brace is curved inward in the vehicle width direction. The brace body 58 is composed of a front brace 59 and a rear brace 60 that are divided into two in the longitudinal direction of the vehicle. The surface edge of the front brace 59 and the surface edge of the rear brace 60 are the surfaces that form the bottom surface of the hat-shaped cross section. Overlaid and joined.

  The vertical edge of the side portion of the front brace 59 and the vertical edge of the side portion of the rear brace 60 are formed in a curved shape along the bulging shape of the wheel house 4, and the side edge portion is continuous with the vertical edge of the front brace 59. And the side edge part which continues to the vertical edge of the rear brace 60 is joined to the wall surface of the wheel house inner 5 of the wheel house 4, and the brace body 58 is joined to the wheel house 4.

  That is, the brace is constituted by the phosphorus hose 57 and the brace body 58, and the brace extends in the vertical direction to form a closed cross-sectional shape with the wheel house 4 and is joined to the wheel house 4. The lower end of the brace (the lower part of the phosphorus hose 21) is joined to the spring house 52. For this reason, the brace is joined to the side member 1 via the spring house 52.

  The brace body 58 has substantially the same configuration as the brace body 24 (see FIGS. 1 and 2) of the first embodiment. In the second embodiment, the spring house 52 bulges from the wheel house 4 and Since the upper portion is arranged together with the phosphorus hose 57, the brace body 58 has a short vertical length.

  The brace body 58 is in a state where the area is gradually widened in the front-rear direction and the left-right direction of the vehicle toward the upper opening. The brace body 58 (phosphorus hose 57) has a hat-shaped cross section, a bag structure surrounded by the wall surface of the wheel house inner 5 and the spring house bracket 54.

  The upper opening of the brace body 58 is joined to the bulkhead brace 33 of the rear shelf 31 and the brace body 24 is joined with the closed cross-sectional shape of the rear shelf 31 being continuous by the same structure as the first embodiment. .

  In the vehicle body structure at the rear part of the vehicle according to the second embodiment, the brace body 58 is used to reinforce the wheel house 4 in the same manner as in the first embodiment, even if the spring house 52 bulges from the wheel house 4. And can be performed by the phosphorus hose 57 and the rear shelf 31. Moreover, rigidity can be ensured by the brace in which an increase in weight is suppressed to a minimum and stress distribution is suppressed.

  Therefore, in the above-described vehicle body structure, even if the spring house bulges from the wheel house, the vehicle body structure can achieve both suppression of weight increase of the vehicle body and securing of high-dimensional rigidity.

  The present invention can be used in the industrial field of a vehicle body structure at the rear of a vehicle provided with a rear wheel house and a rear shelf.

It is a perspective view showing the vehicle body structure of the vehicle rear part according to the first embodiment of the present invention. It is detail drawing of the arrow II direction in FIG. FIG. 2 is an exploded view of FIG. 1. It is the IV-IV sectional view taken on the line in FIG. It is a detailed view of the arrow V part in FIG. It is a perspective view showing the attachment state of a brace. It is the figure seen from the arrow VII direction in FIG. Detailed view from the vehicle front side of the rear shelf part. It is the IX-IX sectional view taken on the line in FIG. It is the XX sectional view taken on the line in FIG. It is a perspective view showing the vehicle body structure of the vehicle rear part concerning the example of a 2nd embodiment of the present invention. FIG. 12 is an exploded view of FIG. 11. It is the figure seen from the arrow XIII direction in FIG. It is a XIV-XIV line arrow directional view in FIG.

Explanation of symbols

1 Side member 2 Side member lower 3 Floor panel 4 Wheel house 5 Wheel house inner 6 Quarter inner (Down: Wheel house outer part)
7 Rear pillar (above Quarter Inner)
8,51 Open 9,52 Spring house (suspension support)
10 Spring house panel 11, 54 Spring house bracket 12 Recess 21, 57 Lynn hose 24, 58 Brace body 25, 59 Front brace 26, 60 Rear brace 31 Rear shelf 32 Rear shelf upper brace 33 Bulkhead brace 35 Rear shelf panel 36 Rear shelf Extension 53 Spring House Tube 55 Spring House Lower

Claims (9)

A rear wheel house inner that is provided on the inner side in the vehicle width direction of the rear wheel of the vehicle, and whose upper part curves outward in the vehicle width direction;
A brace that is joined to an inner side surface in the vehicle width direction of the rear wheel house inner, extends vertically along the inner side surface, and forms a brace closed cross-sectional portion that has a horizontal cross-section with the rear wheel house inner;
A vehicle body structure at the rear of the vehicle, comprising a rear shelf extending in the vehicle width direction above the brace,
A cross member member joined to the lower surface of the rear shelf, extending in the vehicle width direction along the rear shelf, and forming a rear shelf closed cross-section portion with the rear shelf perpendicular to the vehicle width direction being a closed cross section; Further comprising
The vehicle body of the rear portion of the vehicle, wherein the end portion of the cross member member and the upper end portion of the brace are coupled to connect the brace closed cross section and the rear shelf closed cross section. Construction. The vehicle body structure at the rear of the vehicle according to claim 1,
The vehicle body structure of the rear portion of the vehicle, wherein the brace closed section has an area of a horizontal section that increases upward. In the vehicle body structure of the vehicle rear part according to claim 1 or claim 2,
The vehicle body structure at the rear of the vehicle, wherein an upper portion of the brace is curved inward in the vehicle width direction. In the vehicle body structure at the rear of the vehicle according to claim 3,
A vehicle body structure at the rear of the vehicle, wherein a bulkhead is joined to an upper end of the brace. In the vehicle body structure at the rear of the vehicle according to any one of claims 1 to 4,
A vehicle body at the rear of the vehicle, wherein a suspension support portion for supporting an upper portion of the suspension device of the vehicle is disposed at a lower portion of the rear wheel house inner, and a lower portion of the brace is joined to the suspension support portion. Construction. In the vehicle body structure of the vehicle rear part according to any one of claims 1 to 5,
A vehicle body structure for a rear portion of a vehicle, wherein a lower end of the brace is joined to a side member extending in a longitudinal direction of the vehicle. In the vehicle body structure at the rear of the vehicle according to any one of claims 1 to 6,
A vehicle body structure for a rear portion of a vehicle, wherein the brace is provided with a reinforcing portion in a portion having a smaller cross-sectional area than the brace closed cross-sectional portion at the upper end of the brace. The vehicle body structure at the rear of the vehicle according to claim 7,
The vehicle body structure of the rear part of the vehicle, wherein the reinforcing part is a phosphorus hose that covers the outside of the brace. The vehicle body structure at the rear of the vehicle according to claim 7,
The vehicle body structure of the rear part of the vehicle, wherein the reinforcing portion is formed by connecting the brace division members divided in the vertical direction to each other to form the brace.

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