JP5939078B2 - Vehicle rear structure - Google Patents

Description

  The present invention relates to a vehicle rear structure, and more particularly to a structure around a back door opening of a vehicle.

  Automobiles with four doors (four-wheeled vehicles) are in widespread use. Such automobiles are required to realize a structure around the back door opening that is highly rigid and difficult to displace. This is to suppress the torsional behavior of the vehicle body and improve the ride comfort, and to ensure safety. In order to realize a structure around the back door opening that is highly rigid and difficult to displace, the corner portion of the back door opening is particularly important. This is because strengthening of the corner portion leads to strengthening of the entire area around the back door opening.

  Patent Document 1 discloses a rear quarter panel that expands or narrows in the vehicle width direction (is in an accordion-like state), and has an upper part and a lower part formed in two parts. Have been described. In Patent Document 1, even in such a rear quarter panel, a reduction in rigidity in the vehicle width direction is avoided by forming a space in a portion where the upper portion and the lower portion of the rear quarter panel are overlapped. I can do it.

Japanese Patent No. 4179829

  In order to realize a structure around the back door opening that is highly rigid and difficult to displace, measures have been conventionally taken to join a thick steel plate to a corner or the like or add a brace in the cross section. However, since such measures increase the number of parts, there are disadvantages such as an increase in cost, an increase in assembling labor / part management labor, and an increase in the weight of the vehicle body.

  Moreover, the technique of patent document 1 is only a technique applied when a rear quarter panel that expands or narrows in the vehicle width direction is provided, and is not a general-purpose technique. In addition, in the technique of Patent Document 1, in order to form a space in a portion where the upper portion and the lower portion of the rear quarter panel are overlapped, a shape is formed such that a convex portion is formed in each of the upper portion and the lower portion. Tends to be complicated, and there is a problem in formability.

  In view of the above problems, the present invention does not cause disadvantages such as an increase in cost, an increase in labor, an increase in the weight of a vehicle body, and does not complicate the shape of the component parts. It aims at providing the vehicle rear part structure which can implement | achieve the circumference | surroundings of an opening part.

  In order to solve the above-described problems, a representative configuration of the present invention includes an inner upper panel that extends in the vertical direction at a side edge of a back door opening of a vehicle, and a back door opening that is overlapped and joined to a lower end of the inner upper panel. In a vehicle rear structure including an inner lower panel that forms a corner portion from a side edge to a lower edge of the portion, and an inner upper panel that covers the inner upper panel and the inner lower panel from the outside of the vehicle, and an outer panel that forms a closed cross section with the inner lower panel, One of the inner lower panel or the inner upper panel is provided at the end on the back door opening side and is provided at the opening side flange that is joined to the end on the back door opening side of the outer panel, and at the outer end in the vehicle width direction. A non-opening side flange that is joined to the outer end of the outer panel in the vehicle width direction, and the other side of the outer panel. It is formed in the longitudinal ends of the portion to be bonded Te, and an inner flange connecting the opening side flange and the non-opening side flange, the inner flange, characterized in that spaced apart from the other.

  According to the above configuration, one of the inner lower panel or the inner upper panel includes the inner flange that is spaced apart from the other of the inner lower panel or the inner upper panel and connects the opening side flange and the non-opening side flange. Thereby, while improving the rigidity of itself, the improvement of the rigidity around a back door opening part and prevention of a displacement can be aimed at. Such an inner flange is a part separated from the other at the end of the part where the inner lower panel and the inner upper panel are overlapped and joined, so the shape is not complicated (simple shape) and the formability is improved. There is no problem.

  The cross section of the portion where the inner lower panel and the inner upper panel are overlapped and joined may be substantially “L” shaped. In this way, by forming a closed cross section with a substantially “L” -shaped inner lower panel and an inner upper panel and an outer panel that covers these from the outside of the vehicle, it is more effective. Thus, the rigidity around the back door opening can be improved and the displacement can be prevented.

  In one of the inner lower panel and the inner upper panel, it is preferable that the curvature of the corner portion of the substantially “L” shape gradually decreases as the inner flange panel is closer to the inner flange. Thereby, an inner lower panel or an inner upper panel provided with an inner flange can be produced by foam molding without generating wrinkles.

  The one is an inner lower panel, and the other inner upper panel is preferably provided with a stepped portion spaced from the inner flange at a position facing the inner flange of the inner lower panel. By setting the inner flange on the inner lower panel that forms the corner portion, it is possible to more effectively improve the rigidity around the back door opening and prevent displacement. Further, by setting the stepped portion on the inner upper panel, it is possible to improve its own rigidity and more effectively improve the rigidity around the back door opening and prevent displacement.

  According to the present invention, a high-rigidity and difficult-to-displace back door opening without causing disadvantages such as an increase in cost, an increase in labor, and an increase in the weight of a vehicle body, and without complicating the shape of components. It is possible to provide a vehicle rear structure capable of realizing the surroundings.

It is the perspective view which looked at the automobile which applied the vehicle rear part structure concerning this embodiment from the vehicle rear side. It is the figure which removed the side body outer panel and the combination lamp outer panel from the motor vehicle shown in FIG. FIG. 3 is a cross-sectional view of FIG. 2. FIG. 3 is a perspective view of the inner lower panel shown in FIG. 2. FIG. 3 is a view in which an inner lower panel is overlapped and joined to a lower end of the inner upper panel shown in FIG. 2. It is sectional drawing of FIG. It is a perspective view of the inner lower panel concerning a comparative example. It is a figure which compares the effect of the inner lower panel shown in FIG. 2, and the inner lower panel shown in FIG. It is a figure shown about the curvature of the corner | angular part of the overlapping part which makes the substantially "L" shape shown to Fig.6 (a).

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  In the drawing, “vehicle front side” is represented by arrow Fwd, “vehicle right side” is represented by arrow Rh, and “vehicle upper side” is represented by arrow Up.

  FIG. 1 is a perspective view of an automobile 100 to which the vehicle rear structure according to the present embodiment is applied as viewed from the vehicle rear side. As shown in FIG. 1, the automobile 100 includes a back door opening 102 on the back surface thereof. The back door opening 102 is closed by closing a back door (not shown). The periphery of the back door opening 102 is formed by combining a plurality of components.

  Above the back door opening 102, a roof panel 104, which is an external component forming the upper surface of the vehicle, and a roof back member 106 extending in the vehicle width direction are provided. The roof back member 106 is joined to an end portion of the roof panel 104 on the rear side of the vehicle, and forms a closed cross section with the end portion.

  Below the back door opening 102, there is provided a rear skirt panel 110 that is joined to an end portion of the rear floor panel 108 forming the vehicle floor on the vehicle rear side. The rear skirt panel 110 is a vertical wall-like panel extending in the vehicle width direction. A tail end member 112 extending in the vehicle width direction from the rear side of the vehicle is joined to the upper portion of the rear skirt panel 110. The tail end member 112 forms a closed cross section with the rear skirt panel 110.

  FIG. 2 is a diagram in which the side body outer panel 114 and the combination lamp outer panel 116 are removed from the automobile 100 shown in FIG. In FIG. 2, the roof panel 104 and the roof back member 106 are also omitted. Hereinafter, the right side of the vehicle will be described, but the same description applies to the left side of the vehicle (however, the left side of the vehicle has a symmetrical structure). As shown in FIG. 2, an inner upper panel 118 (combination lamp inner upper panel) extending in the vertical direction is provided on a side edge of the back door opening 102.

  The upper end of the inner lower panel 120 (combined lamp inner lower panel) is overlapped and joined to the lower end of the inner upper panel 118 from the outside of the vehicle. Hereinafter, the overlapping and joining portion of the inner upper panel 118 is referred to as “overlapping portion 118a (see FIG. 5 etc.)”, and the overlapping and joining portion of the inner lower panel 120 is referred to as “overlapping portion 120a (see FIG. 5). Etc.) ”.

  The inner lower panel 120 forms a corner portion from the side edge to the lower edge of the back door opening 102. The lower end of the inner lower panel 120 is connected to the rear skirt panel 110 and the tail end member 112. The inner upper panel 118 and the inner lower panel 120 together with the reinforcement 122 that reinforces them form a combined lamp inner panel 124 that is a comp part.

  As shown in FIG. 1, the combination lamp inner panel 124 is covered with a combination lamp outer panel 116 that forms a closed cross section with the inner panel 124 from the outside of the vehicle. A rear combination lamp (not shown) in which a brake lamp, a blinker lamp, a back lamp, a tail lamp and the like are integrated is attached to the rear side of the combination lamp outer panel 116.

  FIG. 3 is a cross-sectional view of FIG. 3A is a cross-sectional view taken along the line AA in FIG. 2, and FIG. 3B is a cross-sectional view taken along the line BB in FIG. As shown in FIG. 3A, the inner upper panel 118 is abutted with the combination lamp outer panel 116 to form a substantially rectangular closed cross-sectional space 128. As shown in FIG. 3B, the inner lower panel 120 is also abutted with the combination lamp outer panel 116 to form a substantially rectangular closed cross-sectional space 128.

  As shown in FIG. 2, the upper end of the inner upper panel 118 is connected to the roof panel 104 and the roof back member 106 via the quarter panel 126. As shown in FIG. 1, the quarter panel 126 is covered with a side body outer panel 114 that forms the outer surface of the vehicle side portion from the outside of the vehicle. The combination lamp inner panel 124 and the combination lamp outer panel 116 serve to connect the vehicle roof (the roof panel 104 and the roof back member 106) and the rear end lower portion (the rear skirt panel 110 and the tail end member 112) of the vehicle.

  In order to realize the periphery of the back door opening 102 that is highly rigid and difficult to displace, the corners at the four corners are particularly important. If the four corners around the back door opening 102 are strong, the movement around the back door opening 102 can be suppressed (can be prevented from being crushed), and displacement of the back door opening 102 can be prevented and suppressed. Because it can be done. Therefore, in this embodiment, the inner lower panel 120 that forms the corner portion is formed as follows.

  4 is a perspective view of the inner lower panel 120 shown in FIG. As shown in FIG. 4, the inner lower panel 120 includes an opening side flange 120 b provided at an end portion on the back door opening 102 side and a non-opening side flange 120 c provided at an end portion on the outer side in the vehicle width direction. As shown in FIG. 3B, the opening side flange 120b is joined to the end of the combination lamp outer panel 116 on the outer side in the vehicle width direction, that is, the flange 116a. The non-opening side flange 120c is joined to the end of the combination lamp outer panel 116 on the back door opening 102 side, that is, the flange 116b.

  As shown in FIG. 4, the inner lower panel 120 includes an inner flange 138 that is formed at an end portion in the longitudinal direction (vertical direction) of the overlapping portion 120a and connects the opening side flange 120b and the non-opening side flange 120c. The inner flange 138 is formed away from the inner upper panel 118. More specifically, the inner flange 138 is formed by extending the overlapping portion 120a through a stepped portion 140 that separates the inner flange 138 from the inner upper panel 118. The inner flange 138 formed through the step portion 140 can improve the rigidity of the inner lower panel 120.

  FIG. 5 is a view in which the inner lower panel 120 is overlapped and joined to the lower end of the inner upper panel 118 shown in FIG. In FIG. 5, the inner lower panel 120 is illustrated by a virtual line. As shown in FIG. 5, the inner upper panel 118 also includes an opening side flange 118b provided at an end on the back door opening 102 side and a non-opening side flange 118c provided at an end on the outer side in the vehicle width direction. . As shown in FIG. 3A, the opening side flange 118b is joined to the flange 116a of the combination lamp outer panel 116, and the non-opening side flange 118c is joined to the flange 116b of the combination lamp outer panel 116.

  As shown in FIG. 5, when joining the overlapping portion 118a of the inner upper panel 118 and the overlapping portion 120a (see FIG. 4) of the inner lower panel 120, the joint portions 142a, 142b, 142c, and 142d are spot welded. Further, the joint portions 144a and 144b are spot-welded with three pieces including the flange 116b of the combination lamp outer panel 116.

  6 is a cross-sectional view of FIG. 6A is a sectional view taken along the line CC in FIG. 5, FIG. 6B is a sectional view taken along the line DD in FIG. 5, and FIG. 6C is a sectional view taken along the line EE in FIG. . In FIG. 6, the inner lower panel 120 is illustrated by a solid line, and the combination lamp outer panel 116 is illustrated by a virtual line.

  As shown in FIG. 6A, the cross-section of the overlapping portion 120a of the inner lower panel 120 and the cross-section of the overlapping portion 118a of the inner upper panel 118 are substantially “L” -shaped, and abut against the combination lamp outer panel 116. A square-shaped closed section space 128 is formed. Therefore, a strong closed cross section can be realized without waste. As shown in FIG. 6B, the inner flange 138 of the inner lower panel 120 is formed through a stepped portion 140 that separates the inner lower panel 118 from the inner upper panel 118, and thus is separated from the overlapping portion 118a of the inner upper panel 118. It becomes a state.

  As shown in FIG. 6C, the inner upper panel 118 includes a stepped portion 150 that is separated from the inner flange 138 (up in the separating direction) at a position facing the inner flange 138 of the inner lower panel 120. Such a step portion 150 can improve the rigidity of the inner upper panel 118. The overlapping portion 118 a of the inner upper panel 118 is formed below the stepped portion 150.

  FIG. 7 is a perspective view of the inner lower panel 220 according to the comparative example. The inner lower panel 220 shown in FIG. 7 includes an opening side flange 120b and a non-opening side flange 120c, similar to the inner lower panel 120 of the present embodiment, but does not include the inner flange 138. Therefore, in the inner lower panel 220 according to the comparative example, the joint portions 142a, 142b, 142c, 142d are set at the uppermost end (the upper end is full). Hereinafter, the effects of the structure according to the present embodiment will be described in comparison with this comparative example.

  FIG. 8 is a diagram comparing the effects of the inner lower panel 120 shown in FIG. 2 and the inner lower panel 220 shown in FIG. 8A is a cross-sectional view taken along the line DD in FIG. 5 when loads X and Y are applied to the inner lower panel 120, and FIG. 8B is a cross-sectional view of FIG. 8A when the inner lower panel 220 is used. It is a figure corresponding, Comprising: It is sectional drawing when load X and Y are applied.

  As shown in FIG. 8A, in the structure according to this embodiment, the inner flange 138 increases the rigidity of the inner lower panel 120 itself and strengthens the closed section structure. It can be prevented and suppressed. The inner flange 138 is formed so as to extend the overlapping portion 120a via the stepped portion 140 that is separated from the inner upper panel 118, so that the shape is not complicated (simple shape) and the formability is improved. There is no problem. Further, another part is not added, and it is only necessary to slightly extend the overlapping portion 120a through the step portion 140. Therefore, it is possible to realize a highly rigid and difficult to displace back door opening without causing disadvantages such as increased cost, increased labor, and increased body weight, and without complicating the shape of components. be able to.

  In particular, in the present embodiment, since the step portion 140 is formed over a plurality of surfaces (a plurality of curved surfaces) and the inner flange 138 is formed at the tip portion, the effect of improving the rigidity is high. By forming the stepped portion 140 and the inner flange 138 over a plurality of surfaces, the rigidity can be significantly increased as compared with the case where these are provided on a wide plane. Further, since the step portion 150 is formed on a plurality of surfaces (on a plurality of curved surfaces) at a position facing the inner flange 138 of the inner upper panel 118, the inner upper panel 118 can also obtain a high rigidity improvement effect. . Therefore, it is possible to improve the rigidity around the back door opening 102 and prevent displacement more effectively.

  On the other hand, as shown in FIG. 8B, when the inner lower panel 220 that does not include the inner flange 138 is used instead of the inner lower panel 120 according to the present embodiment, the same cross section as that in FIG. The cross section (end face) of the inner lower panel 220 does not appear. Further, the effect of improving the rigidity of the inner flange 138 cannot be obtained. Therefore, compared with the structure according to the present embodiment, the closed cross-sectional structure is weak and may be displaced (the shape 148 after the displacement is illustrated by a broken line). Therefore, in the structure according to the comparative example, the rigidity around the back door opening 102 cannot be ensured as in the present embodiment, and the displacement cannot be prevented.

  FIG. 9 is a diagram showing the curvature of the corner portion 146 of the overlapping portion 120a having a substantially “L” shape shown in FIG. As shown in FIG. 9, the inner lower panel 120 is formed so that the curvature of the corner portion 146 of the overlapping portion 120 a having a substantially “L” shape gradually decreases as the curvature approaches the inner flange 138. That is, the lengths L1 and L2 of the corners 146 are gradually enlarged as they approach the inner flange 138.

  When the inner flange 138 is set on the inner lower panel 120, wrinkles may occur if the inner lower panel 120 is formed by foam molding. However, by increasing the rounded lengths L1 and L2 of the corner portion 146 closer to the inner flange 138 as described above, the inner lower panel 120 can be manufactured by foam molding without generating wrinkles. Therefore, the inner lower panel 120 can be created without employing draw molding with a low yield.

  In the present embodiment, the inner lower panel 120 is formed as a member that is thicker than the inner upper panel 118. This is because the inner lower panel 120 is a member that forms a corner portion of the back door opening portion 102, and this corner portion receives a large moment when the vehicle body is subjected to torsional behavior, so that the required rigidity is high. is there. For example, the inner lower panel 120 can be set to a plate thickness of 1.0 mm, and the inner upper panel 118 can be set to a plate thickness of 0.6 mm.

  On the other hand, in order to support the tension of the seat belt when the anchor of the seat belt is pulled at the time of collision, the inner upper panel 118 is required to have high strength (tensile strength). Therefore, a high-tensile steel plate (high-tensile material) is preferably used for the inner upper panel 118 in order to ensure the seat belt anchor strength performance at the time of collision. Since the required strength of the inner lower panel 120 is lower than that of the inner upper panel 118, the required strength can be satisfied with ordinary materials (general steel). In this way, by properly using the plate thickness and material for the portion corresponding to the required performance, the weight and cost can be prevented from becoming unnecessarily large.

  The reason why the inner lower panel 120 and the inner upper panel 118 are not formed as an integral member is to improve the yield.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this example. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  For example, although the inner flange 138 is set on the inner lower panel 120 in the above, the inner flange 138 may be set on the inner upper panel 118. Although it is more effective to set the inner flange 138 on the inner lower panel 120 that forms the corner portion, in this case as well, the rigidity around the back door opening 102 can be improved and the displacement can be prevented. When the inner flange 138 is set on the inner upper panel 118, the stepped portion 150 that is separated from the inner flange 138 may be set at a position facing the inner flange 138 of the inner lower panel 120.

  Note that the present invention may be applied by setting the inner flange 138 to a part that forms the periphery of the back door opening 102 other than the above or other sheet metal parts.

  The present invention can be used for a vehicle rear structure, more specifically, a structure around a back door opening of a vehicle.

DESCRIPTION OF SYMBOLS 100 ... Automobile, 102 ... Back door opening part, 104 ... Roof panel, 106 ... Roof back member, 108 ... Rear floor panel, 110 ... Rear skirt panel, 112 ... Tail end member, 114 ... Side body outer panel, 116 ... Combination lamp outer panel 116a, 116b ... flange, 118 ... inner upper panel, 118a ... overlapping portion, 118b ... opening side flange, 118c ... non-opening side flange, 120, 220 ... inner lower panel, 120a ... overlapping portion, 120b ... opening side Flange, 120c ... non-opening side flange, 122 ... reinforcement, 124 ... combination lamp inner panel, 126 ... quarter panel, 128 ... closed section space, 138 ... inner flange, 140 ... step, 142a, 142b, 142c, 142d Joints, 144a, 144b ... joint, 146 ... corners, 148 ... shape after displacement, 150 ... stepped portion

Claims (4)

An inner upper panel extending in the vertical direction at the side edge of the back door opening of the vehicle;
An inner lower panel that is overlapped and joined to a lower end of the inner upper panel to form a corner portion from a side edge to a lower edge of the back door opening;
In the vehicle rear structure including an outer panel that covers the inner upper panel and the inner lower panel from the outside of the vehicle and forms the closed section with the inner upper panel and the inner lower panel,
One of the inner lower panel or the inner upper panel is
An opening side flange provided at an end on the back door opening side and joined to an end on the back door opening side of the outer panel;
A non-opening side flange that is provided at an end portion on the outer side in the vehicle width direction and is joined to an end portion on the outer side in the vehicle width direction of the outer panel;
An inner flange that is formed at an end portion in a longitudinal direction of a portion that is overlapped and joined with the other, and that connects the opening side flange and the non-opening side flange;
The vehicle rear portion structure, wherein the inner flange is separated from the other.   2. The vehicle rear structure according to claim 1, wherein a cross-section of a portion where the inner lower panel and the inner upper panel are overlapped and joined is substantially “L” -shaped.   3. The vehicle rear structure according to claim 2, wherein one of the inner lower panel and the inner upper panel has a gradually decreasing curvature of a corner portion of a substantially “L” shape as the inner flange panel is closer to the inner flange. . The one is an inner lower panel,
The vehicle rear portion according to any one of claims 1 to 3, wherein the other inner upper panel includes a step portion that is separated from the inner flange at a position facing the inner flange of the inner lower panel. Construction.

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