JP4867238B2 - Car body rear structure - Google Patents

Description

  The present invention relates to a vehicle body rear structure.

  Conventionally, there has been known a vehicle body rear structure that includes a waist member extending in the vehicle front-rear direction along the side of the vehicle body between the wheel house and the roof side, and connecting the wheel house and the waist member by a reinforcing member extending in the vertical direction. (For example, Patent Document 1).

With this configuration, it is possible to increase the rigidity of the vehicle body against a push-up input from the rear suspension connected to the wheel house, and to suppress the vehicle body from falling to the side (vehicle width direction) to some extent.
Japanese Utility Model Publication No. 4-26305

  However, even the vehicle body rear structure disclosed in Patent Document 1 may not have sufficient rigidity for larger inputs.

  As a countermeasure, if a cross member is provided on the floor, it is possible to suppress the body from falling down. However, the labor and cost of manufacturing increase, and it becomes difficult to flatten the floor. There was a problem that it could not be formed, and this could lead to a decrease in merchantability.

  In view of the above, an object of the present invention is to obtain a vehicle body rear structure that can increase the rigidity more effectively.

In the present invention, the vehicle body rear portion includes a waist member extending in the vehicle front-rear direction along the vehicle body side portion between the wheel house and the roof side, and the wheel house and the waist member are connected by a reinforcing member extending in the vertical direction. In the structure, as the reinforcing member, an inner reinforcement that is disposed on the vehicle interior side of the waist member and curves so that the vehicle interior side becomes concave as it goes downward from above is provided, and an upper end portion of the inner reinforcement is provided. The upper edge of the upper wall formed by bending toward the outer side of the passenger compartment is connected to the outer edge of the outer wall of the upper wall of the waist member, and the lower end of the inner reinforcement The most important feature is that it is joined to the upper wall of the wheelhouse inner .

  According to the present invention, as the reinforcing member, the inner reinforcement that connects the upper part of the wheel house where the connection point with the suspension is set and the waist member is provided on the vehicle interior side is provided. In addition, the vehicle body rigidity can be improved.

  In particular, because the inner reinforcement is connected to the outside of the passenger compartment above the waist member and connected to the outside of the passenger compartment at the top of the waist member, the twist of the waist member and the deformation of the cross section are suppressed, and the rigidity of the vehicle body is further increased. It can be effectively improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a perspective view of the vehicle body rear structure according to the present embodiment as viewed from the vehicle interior side, FIG. 2 is a side view of the vehicle body rear structure as viewed from the vehicle interior side, and FIG. FIG. 4 is a cross-sectional view (B-- in FIG. 1 and FIG. 2) of the portion where the waist member of the rear structure of the vehicle body is installed. B sectional view). In the figure, FR indicates the front in the vehicle front-rear direction, and IN indicates the vehicle interior side in the vehicle width direction.

  In this embodiment, the rear pillar inner panel 1 on the vehicle interior side and the rear pillar outer panel 2 formed in a substantially U-shaped cross section on the vehicle exterior side are joined to each other by spot welding or the like. A pillar (C pillar) 12 extending in the vertical direction is formed. The pillar 12 has a substantially rectangular closed cross section.

  The rear pillar inner panel 1 is provided with a portion extending in a belt shape in a side view from the position substantially in the middle between the wheel houses 4 and 5 and the roof side 9 toward the rear in the vehicle front-rear direction, while facing the outside of the passenger compartment. Then, a waist reinforcement 3 extending in a band shape in a side view is provided, and the rear pillar inner panel 1 and the waist reinforcement 3 are joined to each other by spot welding or the like to form a waist member 11 having a substantially rectangular closed cross section. ing.

  That is, the waist member 11 is located at a height between the pillar (C-pillar) 12 and the pillar (D-pillar) 13 at the rear end of the vehicle, approximately halfway between the wheel houses 4 and 5 and the roof side 9. The vehicle extends in the vehicle front-rear direction (horizontal direction) along the side of the vehicle body.

  In the waist member 11, the rear pillar inner panel 1 has a substantially L-shaped cross section including an upper wall portion 1b and an inner wall portion 1a, while the waist reinforcement 3 has an outer wall portion 3a and a lower wall portion 3b. And has a substantially L-shaped cross section.

  The end portion of the upper wall portion 1b of the rear pillar inner panel 1 is bent upward so as to form a flange portion 1d. The flange portion 1d and the flange portion at the upper end of the outer wall portion 3a of the waist reinforcement 3 are formed. 3d is joined to each other by spot welding or the like.

  On the other hand, the end of the lower wall portion 3b of the waist reinforcement 3 is bent downward to form a flange portion 3c, and the flange portion 3c and the flange portion at the lower end of the inner wall portion 1a of the rear pillar inner panel 1 are formed. 1c is joined to each other by spot welding or the like.

  Thus, the waist member 11 having a substantially rectangular cross section is formed. As shown in FIG. 4, the front end portion of the waist reinforcement 3 is joined to the rear pillar outer panel 2 by spot welding or the like. In FIG. 4, reference numeral 10 denotes an outer panel.

  On the other hand, in the present embodiment, the wheel house inner 5 on the vehicle interior side and the wheel house outer 4 on the vehicle interior side are joined to each other to form the wheel house 4, 5. A reinforcing member extending in the vertical direction is provided between the two. In this embodiment, as the reinforcing member, an inner reinforcement 7 on the vehicle interior side and an outer reinforcement 8 on the vehicle exterior side are provided, and the rigidity of the waist member 11 is improved on both sides in the vehicle width direction.

  The inner reinforcement 7 is erected along a vertical direction with a substantially constant width on a suspension mounting member 6 fixed on the wheel house inner 5 and is basically disposed on the waist member 11. The upper wall portion 7b, the inner wall portion 7a extending in the vertical direction on the vehicle interior side of the waist member 11, and the width direction both end portions of the inner wall portion 7a, that is, both end portions in the vehicle front-rear direction, are directed toward the vehicle interior outside. And side wall portions 7f, 7f that are erected. Among these, the inner wall portion 7a is provided between the inner end portion of the upper wall portion 7b on the upper side of the waist member 11 and on the vehicle interior side, and the end portion on the vehicle interior side of the suspension mounting member 6, from above. As it goes downward, it curves gently toward the passenger compartment.

  The inner reinforcement 7 is provided in such a posture that an open side of a substantially U-shaped cross section composed of an inner wall portion 7a and a pair of side wall portions 7f, 7f is directed to the outside of the passenger compartment, and the inner wall portion 1a of the waist member 11 is provided. In addition, the corner portions formed by intersecting the flange portion 4b of the wheel house outer 4 and the upper wall portion 5a of the wheel house inner 5 at a substantially right angle, the tip portions of the substantially triangular side wall portions 7f and 7f. The shape is adapted.

  Further, the end portion of the inner wall 7b of the upper wall portion 7b of the inner wall 7b is bent upward so as to form a flange portion 7d, and this flange portion 7d is connected to the upper flange portions 1d and 3d of the waist member 11. Joined by spot welding. At this time, it is preferable to join these three flange portions 1d, 3d, and 7d at a time.

  The side wall portion 7f is also provided with flange portions 7c and 7e, which are respectively provided on the upper wall portion 5a of the wheel house inner 5, the inner wall portion 1a of the rear pillar inner panel 1, and the flange portion 4b of the wheel house outer 4. Joined by spot welding or the like.

  On the other hand, the outer reinforcement 8 is configured as a substantially rectangular plate-like member in a side view, and connects the upper wall portion 4 a of the wheel house outer 4 and the lower end portion of the outer wall portion 3 a of the waist member 11. Yes. The flange portion 8a formed at the upper end portion contacts the lower end portion of the outer wall portion 3a from the vehicle compartment side and is joined to the outer wall portion 3a by spot welding or the like, while the flange portion 8b formed at the lower end portion. Is bent toward the outside of the passenger compartment and joined to the upper wall portion 4a of the wheel house outer 4 by spot welding or the like. Further, a flange portion 8c formed at an end portion on the front side in the vehicle front-rear direction is joined to the outer reinforcement 8 and the outer side of the rear pillar outer panel 2 by spot welding or the like.

  The suspension mounting member 6 is configured as a member having a substantially constant width in a side view covering the corner portion from the upper wall portion 5a to the inner wall portion 5b of the wheel house inner 5, and the upper wall portion 6a includes a suspension member. A mounting portion 6b is formed. The suspension mounting member 6 is fixed on the wheel house inner 5 by abutting flange portions 6c, 6d and the like formed on the edge thereof on the wheel house inner 5 and joining them by spot welding or the like.

  Here, in the present embodiment, as shown in FIG. 3, the upper portion of the inner reinforcement 7 is bent toward the outside of the passenger compartment on the upper side of the waist member 11, and The end portion is connected to the upper portion of the waist member 11 and the end portion outside the passenger compartment.

  If the upper end portion of the inner reinforcement is connected to the vehicle interior side of the waist member 11, the waist member 11 is likely to be twisted or deformed by the input from the inner reinforcement. On the other hand, in this embodiment, the inner reinforcement 7 located on the vehicle interior side with respect to the waist member 11 is made to wrap around the waist member 11 to the outside of the vehicle interior, and to the outside of the vehicle interior above the waist member 11. By connecting, the force from the inner reinforcement 7 is input on both sides in the vertical direction and the vehicle width direction across the center of gravity of the waist member 11 (the center of the closed cross section). It is possible to suppress twisting, deformation of the cross section, and eventually the vehicle body from falling sideways (vehicle width direction).

  In addition, since flange portions are formed at the upper end portions of the waist member 11 and the inner reinforcement 7 and on the outer side of the passenger compartment, and the flange portions 1d, 3d, and 7d are joined at a time, the joining operations are performed separately. In comparison, it is possible to reduce the time and effort required for manufacturing, shorten the time required for manufacturing, and reduce the manufacturing cost.

  In addition, in this embodiment, a substantially U-shaped cross section is formed by the upper wall portion 7b and the side wall portions 7f and 7f of the inner reinforcement 7 and the inner wall portion 7a and the side wall portions 7f and 7f, respectively. By joining to 1b, the inner wall part 1a, and the flange part 4b, a rectangular tube-shaped reinforcing member (inner reinforcement 7) having a substantially rectangular closed cross section is formed, and the rigidity of the reinforcing member is increased to fall (bend) In addition, the rigidity of the waist member 11 (especially torsion) can be reduced by bringing the rectangular tubular reinforcing member into contact with the upper surface of the inner reinforcement 7 and turning around the outside of the passenger compartment. Rigidity and bending rigidity) can be reinforced by the inner reinforcement 7. That is, according to the present embodiment, by increasing the rigidity of the inner reinforcement 7 as the reinforcing member, it is possible to increase the rigidity of the waist member 11, thereby suppressing torsion and cross-sectional deformation of the waist member 11, As a result, the vehicle body can be more reliably suppressed from falling to the side (vehicle width direction).

  Further, in the present embodiment, at least one of the flange portion 4b or 5c (in the present embodiment, the flange portion 4b) of the wheel house outer 4 and the wheel house inner 5 that are flange-bonded to each other to form a wheel house on the upper side. , Connected to the waist member 11.

  For this reason, the rigidity can be increased as compared with the case where they are not connected to each other, and the number of parts is reduced and the manufacturing effort is reduced as compared with the case where another member is provided in this portion. There is an advantage that the cost can be reduced.

  Furthermore, in the present embodiment, at least one of the flange portions 4b and 5c of the wheel house 4 and 5 (in this embodiment, the flange portion 4b) is connected to the lower flange portions 1c and 3c of the waist member 11. These three members can be joined together, and compared with the case where it connects with the other site | part of the waist member 11, there exists an advantage that the effort of manufacture reduces and manufacturing cost can be reduced.

  In particular, in that case, at least one of the flange portions 4b and 5c of the wheel house 4 and 5 (in this embodiment, the flange portion 4b) is sandwiched between the lower flange portions 1c and 3c of the waist member 11. It is possible to suppress the force from the flange portion 4b of the wheel house 4 and 5 from acting on the inner side or the outer side in the vehicle width direction against the waist member 11, and to suppress the twist and cross-sectional deformation of the waist member 11. Is preferred.

  Furthermore, in the present embodiment, the outer reinforcement 8 is provided outside the inner reinforcement 7 so that the rigidity of the upper portions of the wheel houses 4 and 5 can be further increased, thereby suppressing deformation of the vehicle body structure. Can do.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made.

  For example, in the said embodiment, although the flange part of the wheel house inner was connected to the waist member, you may replace with this and may connect the flange part of wheel house outer to a waist member.

  Further, the shape and installation position of each member can be changed as appropriate.

The perspective view which looked at the vehicle body rear part structure concerning this embodiment from the vehicle interior side. The side view which looked at the vehicle body rear part structure concerning this embodiment from the vehicle compartment outer side. The longitudinal cross-sectional view of the part in which the reinforcement member of the vehicle body rear part structure concerning this embodiment is installed (AA sectional drawing of FIG. 1 and FIG. 2). The cross-sectional view of the part where the waist member of the vehicle body rear structure according to the present embodiment is installed (the BB cross-sectional view of FIGS. 1 and 2).

Explanation of symbols

1 Rear pillar inner panel 1c Flange (flange) (of rear pillar inner panel 1)
3 Waist Reinforce 3c Flange (Flange) (Waist Reinforce 3)
4 Wheelhouse outer 4b Flange (flanged) of wheelhouse outer 4
5 Wheelhouse Inner 7 Inner Reinforce 8 Outer Reinforce 9 Roof Side 11 Waist Member

Claims (5)

In the vehicle body rear structure comprising a waist member extending in the vehicle front-rear direction along the vehicle body side portion between the wheel house and the roof side, and connecting the wheel house and the waist member by a reinforcing member extending in the vertical direction.
As the reinforcing member, an inner reinforcement that is arranged on the vehicle interior side of the waist member and curves so that the vehicle interior side becomes concave as it goes downward from above is provided.
The upper edge of the inner reinforcement formed by bending the upper end of the inner reinforcement toward the outer side of the passenger compartment is connected to the outer edge of the outer wall of the upper member of the waist member. ,
A rear structure of a vehicle body, wherein a lower end portion of the inner reinforcement is joined to an upper wall portion of a wheel house inner .   The at least one of a flange of a wheel house outer and a flange of a wheel house inner joined to each other to form the wheel house is extended upward and connected to the waist member. Car body rear structure.   Of the flange of the wheel house outer and the flange of the wheel house inner that are joined together to form the wheel house, the flange that extends upward is connected to the lower side of the waist reinforcement that is joined together to form the waist member. The vehicle body rear part structure according to claim 2, wherein the rear body inner structure is connected to at least one of a flange and a lower flange of the rear pillar inner panel.   Of the flange of the wheel house outer and the flange of the wheel house inner that are joined together to form the wheel house, the flange that extends upward is connected to the lower side of the waist reinforcement that is joined together to form the waist member. The vehicle body rear part structure according to claim 3, wherein the rear part of the rear pillar inner panel is sandwiched between the flange and the rear pillar inner panel. The vehicle body rear part structure according to any one of claims 1 to 4, wherein an outer reinforcement that extends in a vertical direction is provided on the outer side of the passenger compartment of the waist member as the reinforcing member.

Images