JP3653995B2 - Car body rear structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rear body structure of a vehicle, particularly a back door type vehicle such as a van type vehicle.
[0002]
[Prior art]
In a back door type vehicle such as a van type vehicle, the amount of rear overhang from the rear wheel to the rear end of the vehicle body becomes relatively large, and this acts on the rear opening of the vehicle body to which the back door is mounted. The torsional load tends to increase.
[0003]
Accordingly, it is necessary to increase the torsional rigidity of the connecting portion between the rear pillar constituting the side edge of the rear opening of the vehicle body and the rear end panel and rear end cross member constituting the lower edge of the rear opening.
[0004]
For this reason, conventionally, as disclosed in, for example, Japanese Patent Laid-Open No. 7-52825, there is a contrivance to increase the torsional rigidity of the connecting portion by connecting a reinforcement in the plane of the rear pillar inner to form a rear pillar closed section. Has been made.
[0005]
[Problems to be solved by the invention]
However, as described above, even if the rear pillar inner surface is joined to the rear pillar inner surface to form the rear pillar closed cross section, the closed cross sectional area is constrained to be small, and the lower end of the rain force is interrupted. The demand for higher rigidity cannot be met.
[0006]
On the other hand, as disclosed in Japanese Patent Application Laid-Open No. 8-104258, it is also known that the closed cross section of the rear pillar is composed of a rear pillar inner, a reinforcement thereof, and a rear frame connected to the reinforcement. However, in this case as well, since the lower end of the reinforcement is interrupted, the torsional rigidity substantially equal to that of the former structure is obtained.
[0007]
Therefore, the present invention can enlarge the closed cross-sectional area of the rear pillar as much as possible, and the rear pillar component, the rear end panel, and the rear end cross member are completely connected, and the rear pillar closed cross section and the rear end cross closed cross section are continuously connected. The present invention provides a vehicle body rear structure that can be connected and can further enhance the torsional rigidity of the connecting portions of the closed cross-sections.
[0008]
[Means for Solving the Problems]
In the first aspect of the invention, the rear pillar reinforcement is joined across the inner peripheral side flange and the outer peripheral side flange of the rear pillar inner joined to the side portion of the rear end cross member and the floor panel. A side pillar reinforcement having a rear pillar closed section having a dimension in the vehicle width direction and having an extended portion on the vehicle center side along the lower edge of the rear pillar reinforcement is joined and disposed, and the lower edge of the side lower reinforcement is disposed on the floor. A lower end portion of the rear pillar closed section is formed by being joined to a panel, and an extended portion of the side lower reinforcement is joined to a rear end panel and a rear end cross member, and the rear pillar closed section, the rear end panel, and the rear end cross member are joined. rear end while connecting the cross closed cross section by continuous side configured in a A patch plate is joined between the outer peripheral side of the reinforcement and the connection between the side edge of the rear end panel and the rear edge of the rear fender, and the second rear pillar closed cross section between the side lower reinforcement and the rear end panel It is characterized by comprising.
[0010]
In the invention of claim 2 , a panel reinforcing surface bent forward is provided on the side portion of the rear end panel according to claim 1, and the extended portion of the side lower reinforcement is joined to the panel reinforcing surface. It is characterized by that.
[0011]
【The invention's effect】
According to the first aspect of the present invention, the rear pillar reinforcement is joined across the inner peripheral side flange and the outer peripheral side flange of the rear pillar inner, and the rear pillar closed cross section is configured by the vehicle width direction dimension of the rear pillar inner. The closed cross-sectional area is enlarged, and the lower area of the rear pillar closed cross-section, which is the connection part with the rear end cross-closed cross-section, is enlarged by the side lower reinforcement joined along the lower edge of the rear pillar reinforcement. The side pillar reinforcement is joined to the rear end panel and the rear end cross member, and the rear pillar components are completely connected to the rear end panel and the rear end cross member. The rear pillar closed cross section and the rear end cross closed cross section are connected continuously. , It is possible to increase the torsional rigidity of the connecting portion of closed cross each other further.
[0012]
Further, as described above, the side lower reinforcement is provided with an extending portion extending toward the vehicle center side and is joined to the rear end panel in a state where the overlap amount with the rear end panel is increased. And the rear end panel and the rear end cross member have high connection rigidity, and the torsional rigidity can be further increased.
[0013]
In addition, a second rear pillar closed section is formed at the lower end portion of the rear pillar closed section, which is connected to the rear end cross closed section by the patch plate, and the total area of the rear pillar closed section is enlarged. Since the reinforcement exists as a rib wall in the vehicle width direction separating the rear pillar closed section and the second rear pillar closed section, the torsional rigidity can be further increased.
[0014]
According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, the rear end panel has a panel reinforcing surface bent forward at a side portion thereof, and the side reinforcement is provided on the panel reinforcing surface. Therefore, the rigidity of the joint with the side lower reinforcement can be increased, and the torsional rigidity can be increased more effectively without using another reinforcing member.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0016]
1 and 2, 1 is a floor panel composed of a floor center 1A and a floor side 1B, 2 is a rear end panel joined to a rear edge flange 1a of the floor panel 1, and 3 is formed in an inverted L-shaped cross section, with a rear edge. The rear end cross member is shown in which the flange 3a is joined to the upper edge flange 2a of the rear end panel 2 and the lower edge flange 3b is joined to the floor panel 1, and the rear end panel 2, the rear end cross member 3 and the rear end portion of the floor panel 1 are shown. The rear end cross closed section 4 is constituted by (see FIGS. 4 and 5).
[0017]
A panel reinforcing surface 5 is formed in a substantially lower half of the side portion of the rear end panel 2 and is bent in a generally U shape toward the front (see FIGS. 4, 7, and 8).
[0018]
Reference numeral 6 denotes a rear pillar inner having a side wall which is connected to the upper wall of the rear end cross member 3 at the inner peripheral side edge and forms a peripheral wall of the rear opening of the vehicle body, and a lower edge flange 6a is joined to the floor panel 1. The end portion on the inner peripheral side extending to the vehicle center side is externally fitted to the side portion of the rear end cross member 3 and joined.
[0019]
Reference numeral 7 denotes a rear pillar reinforcement disposed outside the rear pillar inner 6, and is joined across an inner peripheral flange 6b provided on the rear edge of the side wall of the rear pillar inner 6 and an outer peripheral flange 6c. A rear pillar closed section 8 having a dimension in the vehicle width direction is formed (see FIG. 6).
[0020]
As shown by the chain line in FIG. 2, the rear pillar reinforcement 7 exists up to a height position near the corner portion where the inner peripheral side wall of the rear pillar inner 6 bends and extends toward the vehicle center side.
[0021]
Reference numeral 9 denotes a side lower reinforcement which is joined along the lower edge of the rear pillar reinforcement 7 at the joint margin 9a of the upper edge and is disposed on the lower extension of the rear pillar reinforcement 7.
[0022]
The side lower reinforcement 9 has an extending portion 10 extending toward the vehicle center on the rear wall, and the front edge of the side wall bent toward the outer peripheral side is joined to the outer peripheral side flange 6 c of the rear pillar inner 6 in the same manner as the rear pillar reinforcement 7. In addition, the joint margin 9b at the lower edge of the side wall is joined to the upper edge of the side portion of the floor side 1B, and the joint margin 9c provided over the formation range of the extending portion 10 at the lower edge of the rear wall is provided on the floor panel. The lower edge portion of the pillar closed section 8 is configured by being sandwiched and joined between the rear edge flange 1a and the rear end panel 2.
[0023]
The end of the extended portion 10 on the vehicle center side is bent in accordance with the bent shape of the panel reinforcing surface 5 of the rear end panel 2, and the upper edge flange 10 a of the extended portion 10 is partially formed on the rear pillar inner 6. The inner edge side flange 6b of the rear end cross member 3 and the upper edge flange 2a of the rear end panel 2 are integrally joined together, and the upper edge flange 10a is joined to the upper wall of the rear end cross member 3. Further, the rear pillar closed cross section 8 and the rear end cross closed cross section 4 are continuously connected by superposing and joining the bent portion of the extending portion 10 to the panel reinforcing surface 5 of the rear end panel 2. (See FIGS. 3, 4, and 7).
[0024]
Reference numeral 11 denotes a patch plate, which joins a joining edge 11a of the front edge to the rear edge portion of the side wall on the outer peripheral side of the side lower reinforcement 9, and a rear edge flange 11b to a side edge flange 2b of the rear end panel 2 and a rear fender. 12 between the side edge reinforcement 9 and the rear end panel 2 to form a second rear pillar closed cross-section 13 (see FIGS. 6 and 7). 8).
[0025]
In FIGS. 1 and 2, reference numeral 14 denotes a rear combination lamp base that constitutes a part of the rear fender 12 and constitutes a mounting portion of a rear combination lamp (not shown). A lower edge joining margin 14 a is connected to the rear fender 12 and the rear end panel 2. In addition, the inner peripheral flange 14b is integrally connected to the inner peripheral flange 6b of the rear pillar inner 6 and the upper edge flange 2a of the rear end panel 2.
[0026]
According to the structure of the above embodiment, the rear pillar reinforcement 7 is joined across the inner peripheral side flange 6b and the outer peripheral side flange 6c of the rear pillar inner 6, and the rear pillar closed section 8 is connected to the rear pillar inner 6 in the vehicle width direction. The rear pillar closed cross-section which is configured with dimensions and has an enlarged pillar closed cross-sectional area and which is connected to the rear end cross closed cross-section 4 by the side lower reinforcement 9 joined along the lower edge of the rear pillar reinforcement 7 The lower end portion of 8 is configured in a state in which an enlarged area is maintained, and the extension portion 10 of the side lower reinforcement 9 is joined to the rear end panel 2 and the rear end cross member 3 to form a rear pillar component member. Are completely connected to the rear end panel 2 and the rear end cross member 3, and the rear pillar closed section 8 and the rear end Since the Dokurosu closed section 4 are connected in series, it is possible to increase the torsional rigidity of the connecting portion of closed cross-section 4,8 further.
[0027]
Further, as described above, the side lower reinforcement 9 includes the extending portion 10 extending toward the vehicle center side, and is joined to the rear end panel 2 in a state where the overlap amount with the rear end panel 2 is increased. The connection rigidity between the side lower reinforcement 9 and the rear end panel 2 and the rear end cross member 3 is high, and the torsional rigidity can be further increased.
[0028]
In particular, in the present embodiment, as described above, the patch plate 11 forms the second rear pillar closed cross section 13 at the lower end portion of the rear pillar closed cross section 8 which is a connection portion with the rear end cross closed cross section 4, and the total rear pillar closed cross section is formed. In combination with the increased area, the side lower reinforcement 9 exists as a rib wall in the vehicle width direction that separates the rear pillar closed section 8 and the second rear pillar closed section 13. Can be further increased.
[0029]
Further, the rear end panel 2 has a panel reinforcing surface 5 bent forward on the side thereof, and the extending portion 10 of the side lower reinforcement 9 is joined to the panel reinforcing surface 5. As a result, the torsional rigidity can be effectively increased without using another reinforcing member.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a main part of an embodiment of the present invention.
FIG. 2 is an exploded perspective view of one embodiment of the present invention.
3 is a cross-sectional view of the assembled state corresponding to the line AA in FIG. 2;
4 is a cross-sectional view taken along line BB in FIG.
FIG. 5 is a cross-sectional view taken along the line CC of FIG.
6 is a cross-sectional view of the assembled state corresponding to the line DD in FIG. 2;
7 is a cross-sectional view of the assembled state corresponding to the EE line of FIG. 2;
8 is a cross-sectional view of the assembled state corresponding to the line FF in FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Floor panel 2 Rear end panel 3 Rear end cross member 4 Rear end cross closed section 5 Panel reinforcement surface 6 Rear pillar inner 6b Inner side flange 6c Outer side flange 7 Rear pillar reinforcement 8 Rear pillar closed section 9 Side lower reinforcement 10 Extension part 11 Patch Plate 12 Rear fender 13 Second rear pillar closed section

Claims (2)

The rear pillar reinforcement is joined across the inner and outer flanges of the rear pillar inner that is joined to the side of the rear end cross member and the floor panel, and the rear pillar inner cross-section of the rear pillar inner is configured. A side lower reinforcement having an extending portion on the vehicle center side is joined and disposed along the lower edge of the rear pillar reinforcement, and the lower edge of the side pillar reinforcement is joined to the floor panel to form the rear pillar closed section. A lower end portion is formed, and an extended portion of the side lower reinforcement is joined to a rear end panel and a rear end cross member, and the rear pillar closed cross section and a rear end cross closed cross section formed by the rear end panel and the rear end cross member are formed. while continuous, and the outer peripheral side surface of the side lower reinforcement, The patch plate was bonded arranged over and between the connection portion of the Ya-end panel side edges and the rear fender rear edge, characterized in that constitutes the second pillar closed cross section between the side lower reinforce the rear end panel Car body rear structure. 2. The rear part of a vehicle body according to claim 1 , wherein a panel reinforcing surface bent forward is provided on a side portion of the rear end panel, and an extended portion of the side lower reinforcement is joined to the panel reinforcing surface. Construction.

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