JP2016175564A - Vehicle rear structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle rear structure that is able to restrict deformation of a rear corner part in a vehicle width direction and/or deformation between the upper and lower parts of a lower back panel by a simpler structure.SOLUTION: In a vehicle rear structure, a lower back panel 25 is joined to the rear end of a side member 21, a wheel house inner 31 is joined to a side of the side member 21, and a side outer 33 is connected to the lower back panel 25 and wheel house inner 31. The vehicle rear structure has a floor side re-in-force 41 having : a fixing part 42 joined to the side member 21; an installation part 43 arranged in a rear corner 35; and a three-dimensional shape part 44 extending upward from the fixing part 42. A first edge part 43a of the installation part 43 is joined to the side outer 33; a second edge part 43b, to the lower back panel 25; and a third edge part 43c, to the wheel house inner 31. The three-dimensional shape part 44 is joined to the lower back re-in-force 26 of the lower back panel 25.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle body rear structure in which a side member, a lower back panel, a wheel house, a side panel and the like are joined to each other.

  There has been proposed a technique for improving running stability by improving rigidity in a vehicle body rear structure in which side members, a lower back panel, a wheel house, a side panel, and the like are joined to each other. For example, in Patent Document 1, a closed cross section is formed by a side drain inner panel having a substantially U-shaped cross section and a rear side inner panel, and both ends in the vehicle width direction of a rear floor panel joined to a rear side frame are joined. In patent document 2, the lower end edge part of a wheel house inner is reinforced by joining a connection plate member to the lower end edge part of a wheel house inner.

  In Patent Document 3, a lower backside reinforcement having a hat-shaped cross section in the vertical direction is joined to a lower back panel and a lower back reinforcement. Although Patent Document 4 is a support structure for a rear bumper, a structure in which a strength reinforcing member is provided at a substantially vertical joint between the rear side member and the rear panel is described.

JP 2006-7801 A JP 2007-168712 A JP 2012-236480 A JP 2009-208610 A

  However, in the conventional vehicle body rear structure, it is not easy to further improve the steering stability by further improving the rigidity of the vehicle body rear portion. For example, in Patent Document 1, the rear floor panel between the side drain force and the rear side frame is easily bent and deformed. In Patent Document 2, since the mounting position is the lower end edge of the wheel house inner, it is not easy to sufficiently suppress the deformation of the rear corner, which is a portion where the side panel and the lower back panel are joined.

  In Patent Document 3, since the vertical cross section is a hat-type lower backside reinforcement, it is not easy to prevent deformation in the vertical direction and the falling direction between the lower back reinforcement portion and the lower portion thereof. In Patent Document 4, although the collapse of the bumper stay can be prevented, it is not easy to prevent the deformation in the vertical direction or the fall direction between the upper part and the lower part of the lower back panel.

  Furthermore, in any rear body structure of any document, both the deformation in the expanding direction at the rear corner of the vehicle body and the deformation in the vertical direction and the falling direction between the upper and lower parts of the lower back panel are simultaneously performed. In addition, the increase in the number of parts and weight could not be prevented and suppressed.

  SUMMARY OF THE INVENTION Accordingly, it is a first object of the present invention to provide a vehicle body rear structure that can suppress deformation of the rear corner in the vehicle width direction with a simple structure, and the deformation between the upper portion and the lower portion of the lower back panel is simplified. A second object of the present invention is to provide a rear structure of a vehicle body that can be suppressed by the structure, and furthermore, a vehicle body that can simultaneously suppress both deformation in the vehicle width direction of the rear corner and deformation between the upper part and the lower part of the lower back panel. A third object is to provide a rear structure.

  In the first vehicle body rear structure that achieves the first object, the lower back panel is joined to the rear end of the side member, and the wheel house is joined to the side of the side member. A vehicle body rear structure in which a side panel is joined and a floor side extension is disposed at a rear corner located between the side member and the side panel sandwiched between the lower back panel and the wheel house. The floor side reinforcement has a shape that is arranged at a position spaced apart from the floor side extension in the vertical direction and that can restrain deformation in the direction in which the side member and the side panel come into contact with each other. Are joined.

The floor side reinforcement should be joined to the lower back panel.
The lower back panel preferably includes a lower back reinforcement extending in the vehicle width direction, and the floor side reinforcement preferably has a three-dimensional shape and is joined to the lower back panel and joined to the lower back reinforcement. Furthermore, the floor side reinforcement is preferably joined to the wheel house.

  The second vehicle body rear structure that achieves the second object is a vehicle body rear structure that includes a lower back panel that is joined to the rear end portion of the side member, and the lower back panel extends in the vehicle width direction. The floor side reinforcement is joined to the upper surface of the side member, and the floor side reinforcement is joined to the lower back reinforcement by the three-dimensional shape part joined to the lower back panel.

  In the third vehicle body rear structure that achieves the third object, the lower back panel is joined to the rear end of the side member, the wheel house is joined to the side of the side member, and the lower back panel and the wheel house are joined. The rear structure of the vehicle body joined to the side panel is a fixed part joined to the upper surface of the side member, and the rear corner located between the side member and the side panel sandwiched between the lower back panel and the wheel house. A floor side reinforcement having a three-dimensionally shaped portion erected from the fixed portion, the first edge of the erection portion is joined to the side panel, and the second edge of the erection portion is lower It is joined to the back panel, the third edge of the installation part is joined to the wheel house, and the three-dimensional shape part is a lower back reinforcement extending in the vehicle width direction of the lower back panel It has been engaged.

  According to the first vehicle body rear structure of the present invention, the side member and the side panel are joined to each other by the floor side reinforcement disposed at a position spaced apart from the floor side extension at the rear corner, Deformation of the rear corner in the vehicle width direction can be suppressed. In addition, the floor side reinforcement has a shape that can suppress deformation in the direction in which the side member and the side panel are separated from each other by an axial force, so even if the floor side reinforcement is formed in a lightweight and simple shape, the deformation is suppressed. A sufficient effect is obtained. Therefore, it is possible to provide a vehicle body rear structure that can suppress deformation of the rear corner in the vehicle width direction with a simple structure.

  According to the second vehicle body rear structure of the present invention, since the floor side reinforcement joined to the upper surface of the side member is joined to the lower back reinforcement, the rigidity of the joined portion between the side member and the lower back panel is increased. A joining portion between the rear end portion of the member and the lower back panel, and a joining portion between the upper surface of the side member and the lower back panel by floor side reinforcement are combined. Furthermore, since the side member and the lower back reinforcement are joined in a three-dimensional shape by the three-dimensional shape part joined to the lower back panel, the rigidity of the joint portion between the side member and the lower back panel can be improved, especially the upper portion of the lower panel. It is possible to prevent deformation in the vertical direction and deformation in the fall direction between the upper part and the lower part. Therefore, it is possible to provide a vehicle body rear structure that can suppress deformation between the upper portion and the lower portion of the lower back panel with a simple structure.

  According to the third vehicle body rear structure of the present invention, the floor side reinforcement has a fixed portion joined to the upper surface of the side member, a construction portion arranged at the rear corner, and a three-dimensional shape erected from the fixed portion. A construction portion is joined to the side panel, the lower back panel, and the wheel house, and the three-dimensional shape portion is joined to the lower back reinforcement. For this reason, the side member and the lower back reinforcement can be joined in a three-dimensional shape by the three-dimensionally shaped portion erected from the fixed portion joined to the upper surface of the side member, and the rigidity of the joint portion between the side member and the lower back panel can be increased. It is possible to improve, and in particular, it is possible to prevent vertical deformation and tilting deformation between the upper and lower portions of the lower panel. Further, since the side panel, the lower back panel, and the wheel house are joined by the erection portion disposed at the rear corner, deformation of the rear corner in the vehicle width direction can be suppressed. Therefore, it is possible to provide a vehicle body rear portion structure that can simultaneously suppress both the deformation in the vehicle width direction of the rear corner and the deformation between the upper portion and the lower portion of the lower back panel.

It is the perspective view which showed the vehicle body rear part structure which concerns on embodiment of this invention, and looked at the lower part of the right direction rear end from the vehicle inner side. It is a disassembled perspective view of the member before joining which constitutes the body rear part structure concerning the embodiment of the present invention. The floor side reinforcement which concerns on embodiment of this invention is shown, (a) is a front side perspective view, (b) is a back side perspective view, (c) is a top view. It is a fragmentary sectional view which shows typically the partial cross section at the time of cut | disconnecting the vehicle body rear part structure which concerns on embodiment of this invention along the AA line of FIG.3 (c). It is a fragmentary sectional view which shows typically the partial cross section at the time of cut | disconnecting the vehicle body rear part structure which concerns on embodiment of this invention along the BB line of FIG.3 (c). It is a fragmentary sectional view which shows typically the partial cross section at the time of cut | disconnecting the vehicle body rear part structure which concerns on embodiment of this invention along CC line of FIG.3 (c).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The vehicle body rear structure of this embodiment is an example of a vehicle body having a large back door opening such as a hatchback vehicle or a wagon vehicle, and is provided on both sides in the vehicle width direction. Here, one of them will be described. As shown in FIGS. 1 and 2, the vehicle body rear portion structure is configured by connecting a vehicle body lower portion 11, a vehicle body rear end portion 13, a wheel house portion 15, and a vehicle body side portion 17 to each other. .

  The vehicle body lower portion 11 is constructed between a side member 21 that is a skeleton member extending in the vehicle body longitudinal direction, a floor side panel 22 that is joined to the upper portion of the side member 21 and extends in the vehicle body longitudinal direction, and the left and right side members 21. And a floor panel 23. The side member 21 has a hat-shaped cross section, and has a pair of flange portions 21a and a deep concave portion 21b. The floor side panel 22 has a pair of flange portions 22a corresponding to the side members 21 and a shallow concave portion 22b. The floor panel 23 is joined to the flange portion 21 a of the side member 21.

  A lower back panel 25 is disposed below the back door opening 24 at the rear end 13 of the vehicle body and joined to the rear end of the side member 21. A lower back patch, a bumper structure, and the like are joined to the outside of the joined portion of the lower back panel 25. A lower back reinforcement 26 extending in the vehicle width direction is joined to the lower back panel 25 along the lower portion of the back door opening 24. A D pillar 27 extending in the vertical direction is disposed on the side of the back door opening 24. The lower back reinforcement 26 has a vertical direction portion 28 extending downward at a position corresponding to the D pillar 27.

  In the wheel house portion 15, a wheel house inner 31 is disposed on the front side separated from the lower back panel 25. The wheel house inner 31 constitutes a wheel house together with a wheel house outer (not shown), and is joined to the side portion of the side member 21 at a portion that bulges inward in the vehicle width direction. A side outer 33 is disposed on the vehicle body side portion 17. The side outer 33 constitutes a side panel together with a side inner (not shown), and is joined to the lower back panel 25 and the wheel house inner 31.

  A rear corner 35 serving as a gap is formed at a position between the side member 21 and the side outer 33 sandwiched between the lower back panel 25 and the wheel house inner 31. In the rear corner portion 35, a floor L-shaped reinforcement 41 as a floor side reinforcement is disposed, and a floor side extension 37 is disposed. As shown in FIGS. 3A to 3C, the floor L-shaped reinforcement 41 includes a fixed portion 42 joined to the upper surface of the side member 21 and a rear corner portion 35 continuously from the vehicle width direction outside of the fixed portion 42. And a three-dimensionally shaped portion 44 that is erected on the rear side of the vehicle continuously from the fixed portion 42.

  As shown in FIGS. 4 and 5, the fixing portion 42 has a shape corresponding to the flange portion 22 a and the concave portion 22 b of the floor side panel 22, is joined to these, and is further joined to the side member via the floor side panel 22. 21 is joined to the upper surface of the flange portion 21a. The erection part 43 is formed in a frame shape so as to surround a through-opening 43 h penetrating vertically in the central part, and is inclined upward with respect to the fixed part 42. The cross section on each edge side of the erection part 43 is formed in a substantially L-shape or a substantially U-shape, and the upper surfaces on all the edge side are continuous in a substantially flat shape.

  As shown in FIG. 4, the first edge 43 a that is the outer side in the vehicle width direction of the erection part 43 is joined to the lower end of the side outer 33 via the lower part of the partition wall 39. As a result, the side member 21 and the side outer 33 are joined by the floor L-shaped reinforcement 41. As shown in FIG. 6, the second edge 43 b on the vehicle rear side of the erection part 43 is joined to the inner side surface of the lower back panel 25 on the outer side in the vehicle width direction from the longitudinal part 28 of the lower back reinforcement 26. Yes. The 3rd edge 43c used as the vehicle front side of the construction part 43 is joined to the wheel house inner 31, as shown in FIG.

  In such a erection part 43, the compressive load and the tensile load in the vehicle width direction applied between the first edge 43a and the fixed part 42 are the shape of the erection part 43 in the vehicle width direction. Due to the shape on the second edge 43b side or the shape in the vehicle width direction on the third edge 43c side between the edge 43a and the fixed part 42, the construction part 43 is loaded as an axial force. Therefore, deformation in the direction in which the side member 21 and the side outer 33 are separated from each other can be suppressed by the axial force. The compressive load or tensile load in the vehicle front-rear direction applied between the second edge portion 43b and the third edge portion 43c is the shape of the erection portion 43 in the vehicle width direction, specifically the second edge portion 43b and the second edge portion 43c. Due to the shape of the first edge 43a side between the three edge portions 43c or the shape of the fixing portion 42 side in the front-rear direction, the construction portion 43 is loaded as an axial force. Therefore, deformation in the direction in which the lower back panel 25 and the wheel house inner 31 are separated from each other can also be suppressed by the axial force.

  The three-dimensionally shaped portion 44 has a three-dimensional shape with a horizontal cross section that is a hat shape and is formed on the vehicle rear side of the fixed portion 42. The inner surface of the recess 44b is formed in a shape and size corresponding to the lower outer surface of the longitudinal portion 28 of the lower back reinforcement 26, and both flange portions 44a are formed in a shape corresponding to the inner surface of the lower back panel 25. Has been. The three-dimensionally shaped portion 44 is disposed at a position corresponding to the D pillar 27, and as shown in FIG. 5, a concave portion 44b is joined to cover the lower side of the longitudinal portion 28 of the lower back reinforcement 26, and both flange portions 44a are joined. Are joined to the lower back panel 25.

  As shown in FIG. 4, the floor side extension 37 has a substantially L-shaped longitudinal section in the vehicle width direction. The inner end of the floor side extension 37 is joined to the side member 21 via the floor side panel 22 and the floor L-shaped reinforcement 41. Further, the outer end portion is joined to the upper portion of the partition wall 39 joined to the lower end of the side outer 33. Further, as shown in FIG. 6, the rear side end portion of the floor side extension 37 is joined to the lower back panel 25, and the front side end portion is joined to the wheel house inner 31. The floor side extension 37 is disposed at least partially with respect to the floor L-shaped reinforcement 41, here, in the rear corner portion 35 so as to be spaced apart vertically.

  According to the vehicle body rear portion structure of the present embodiment described above, the floor L-shaped reinforcement 41 disposed between the side member 21 and the side outer 33 is spaced apart from the floor side extension 37 of the rear corner portion 35 in the vertical direction. Since they are connected, deformation of the rear corner portion 35 in the vehicle width direction can be suppressed. Furthermore, since the floor L-shaped reinforcement 41 has a shape that can suppress deformation in the direction in which the side member 21 and the side outer 33 are separated from each other by an axial force, the floor L-shaped reinforcement 41 is formed in a lightweight and simple shape. However, a sufficient effect of suppressing deformation can be obtained. Therefore, it is possible to realize a vehicle body rear portion structure that can suppress deformation of the rear corner portion 35 in the vehicle width direction with a simple structure.

  Further, according to the vehicle body rear portion structure of the present embodiment, the floor L-reinforce 41 joined to the upper surface of the side member 21 is joined to the lower back reinforcement 26, so that the space between the side member 21 and the lower back panel 25 is reduced. The rigidity of the connecting portion is a combination of the joining of the rear end portion of the side member 21 and the lower back panel 25 and the joining of the upper surface of the side member 21 and the lower back panel 25 by the floor L-shaped reinforcement 41. Furthermore, since the side member 21 and the lower back reinforcement 26 are connected in a three-dimensional shape by the three-dimensional shape portion 44 joined to the lower back panel 25, the rigidity of the connecting portion between the side member 21 and the lower back panel 25. In particular, it is possible to prevent vertical deformation and tilting deformation between the upper and lower portions of the lower panel. Therefore, it is possible to realize a vehicle body rear portion structure that can suppress deformation between the upper portion and the lower portion of the lower back panel 25 with a simple structure.

  Furthermore, according to the vehicle body rear portion structure of the present embodiment, the floor L-shaped reinforcement 41 includes a fixed portion 42 joined to the upper surface of the side member 21, a construction portion 43 disposed in the rear corner portion 35, and the fixed portion 42. A three-dimensionally shaped portion 44 erected, the erected portion 43 is joined to the side outer 33, the lower back panel 25, and the wheel house inner 31, and the three-dimensionally shaped portion 44 is joined to the lower back reinforcement 26. Therefore, the side member 21 and the lower back reinforcement 26 can be connected in a three-dimensional shape as described above by the three-dimensional shape portion 44 erected from the fixing portion 42 joined to the upper surface of the side member 21. Moreover, since the side outer 33, the lower back panel 25, and the wheel house inner 31 can be connected by the installation part 43 arrange | positioned at the rear corner part 35, the deformation | transformation of the vehicle width direction of the rear corner part 35 can be suppressed. Therefore, both the deformation in the vehicle width direction of the rear corner 35 and the deformation between the upper part and the lower part of the lower back panel 25 can be suppressed at the same time.

  Further, in the vehicle body rear structure of the present embodiment, since the erection portion 43 has a through opening 43h penetrating vertically in the rear corner portion 35, the floor L-shaped reinforcement 41 and the floor side extension 37 are arranged vertically. Even if the periphery is surrounded, it is possible to process the interior between the floor L-shaped reinforcement 41 and the floor side extension 37 through the through-opening 43h. For example, a spot welding spot is provided inside to perform the joining operation. It can be carried out.

  Furthermore, in the vehicle body rear structure of the present embodiment, the floor L-shaped reinforcement 41 is attached to the side member 21, the side outer 33, the lower back panel 25, and the wheel house inner 31. Accordingly, the floor L-shaped reinforcement 41 does not have a portion that protrudes toward the passenger compartment between the joint portions, and the space of the passenger compartment or the luggage compartment is not reduced.

  The above-described embodiment can be appropriately changed within the scope of the present invention.

  For example, in the above description, an example in which a floor side extension 37 having an L-shaped cross section is used and the floor L-shaped reinforcement 41 is disposed below the floor-side extension 37 has been described. A floor side extension 37 can also be used. Further, even when the floor side extension 37 is not used, it is possible to apply the vehicle body rear part structure of the present invention.

  In the above description, the vertical portion 28 is provided in the lower back reinforcement 26, but is not particularly limited. For example, the lower back extending in the vehicle width direction is formed by forming the three-dimensional shape portion 44 of the floor L-shaped reinforcement 41 long. It is also possible to join the solid shape portion 44 of the floor L-shaped reinforcement 41 to the reinforcement 26.

11 Car body lower part 13 Car body rear end part 15 Wheel house part 17 Car body side part 21 Side member 21a Flange part 21b Recessed part 22 Floor side panel 22a Flange part 22b Recessed part 23 Floor panel 24 Back door opening 25 Lower back panel 26 Lower back reinforcement 27 D-pillar 28 Longitudinal portion 31 Wheel house inner 33 Side outer 35 Rear corner 37 Floor side extension 39 Partition wall 41 Floor L-shaped reinforcement 42 Fixed portion 43 Construction portion 43a First edge portion 43b Second edge portion 43c Third edge portion 43h Through opening 44 Three-dimensionally shaped portion 44a Flange portion 44b Recessed portion

Claims (6)

A lower back panel is joined to the rear end of the side member and a wheel house is joined to the side of the side member,
Side panels are joined to the lower back panel and the wheel house,
A vehicle body rear structure in which a floor side extension is disposed at a rear corner located between the side member and the side panel sandwiched between the lower back panel and the wheel house,
By floor side reinforcement having a shape that is disposed at a position spaced vertically from the floor side extension at the rear corner, and that can suppress deformation in a direction in which the side member and the side panel are separated from each other by an axial force, A vehicle body rear structure in which the side member and the side panel are joined.   The vehicle body rear part structure according to claim 1, wherein the floor side reinforcement is joined to the lower back panel. The lower back panel includes a lower back reinforcement extending in the vehicle width direction,
The vehicle body rear structure according to claim 2, wherein the floor side reinforcement has a three-dimensional shape and is joined to the lower back panel and joined to the lower back reinforcement.   The vehicle body rear structure according to any one of claims 1 to 3, wherein the floor side reinforcement is joined to the wheel house. A vehicle body rear structure having a lower back reinforcement joined to a rear end portion of a side member, the lower back panel extending in a vehicle width direction,
A vehicle body rear structure in which a floor side reinforcement is joined to the upper surface of the side member, and the floor side reinforcement is joined to the lower back reinforcement by a three-dimensional shape part joined to the lower back panel. A vehicle body rear structure in which a lower back panel is joined to a rear end of a side member, a wheel house is joined to a side of the side member, and a side panel is joined to the lower back panel and the wheel house. ,
A fixing part joined to the upper surface of the side member, and a bridge part disposed between the side member and the side panel sandwiched between the lower back panel and the wheel house, A floor-side reinforcement having a three-dimensional shape portion erected from the fixed portion;
The first edge of the erection part is joined to the side panel, the second edge of the erection part is joined to the lower back panel, the third edge of the erection part is joined to the wheel house, The three-dimensional shape part is a vehicle body rear structure joined to a lower back reinforcement extending in the vehicle width direction of the lower back panel.

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