JP4405328B2 - Rear body structure - Google Patents

Description

  The present invention relates to a rear vehicle body structure that can increase the strength and rigidity of the periphery of a mounting opening of a tailgate that is a back door of a van type vehicle, for example.

Conventionally, in a van type vehicle, a relatively large opening, which is disadvantageous in terms of strength and rigidity, is formed in the tailgate mounting portion at the rear of the vehicle body, and a structure in which the periphery of the tailgate mounting opening is difficult to deform is known. Yes.
For example, a tailgate mounting opening is formed while increasing the rigidity of the connecting portion by forming a closed cross-section structure portion from the upper side to the side of the peripheral edge of the tailgate mounting opening and from the side to the lower side. The rigidity of the peripheral edge of the part is enhanced as a whole.
JP 2003-104239 A

  In recent years, in order to enhance the comfort in the passenger compartment, further improvements in vehicle body rigidity have been required in order to more reliably prevent vehicle body vibration and booming noise. In particular, a structure in which the tailgate is electrically opened and closed has been proposed at the periphery of the tailgate mounting opening, and further improvement in strength and rigidity is required. However, measures such as simply increasing the plate thickness have a problem in that the weight around the tailgate increases, resulting in a reversal in fuel efficiency.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rear vehicle body structure capable of minimizing an increase in vehicle body weight and effectively increasing the strength and rigidity of the periphery of the tailgate mounting opening.

In order to achieve the above object, according to the first aspect of the present invention, the periphery of the tailgate mounting opening (for example, the tailgate mounting opening 1 in the embodiment) is formed in a closed cross-sectional structure over the entire circumference. A closed cross-section structure portion (for example, the embodiment) in which a closed cross section (for example, the closed cross-section structure Y in the embodiment) of the roof side (for example, the roof side inner 40 in the embodiment) is formed at the periphery of the tailgate mounting opening. In the upper closed cross-section structure portion H, the left and right closed cross-section structure portions L and R, and the lower closed cross-section structure portion U) to the side of the side portion (for example, the left and right closed cross-section structure portions L and R in the embodiment) A double closed section (for example, the left and right closed section structures L and R and the closed section structure section Y in the embodiment) is formed by adjoining the side section of the closed section structure and the closed section of the roof side. , The closed cross-section structure portion (for example, the embodiment) is joined to the roof side inner portion (for example, the roof side inner 40 in the embodiment) at the rear of the roof (for example, the roof 35 in the embodiment). The closed cross-section structure portion X) is formed, and the closed cross-section structure portion and the roof side are connected to the roof side along the side portion of the closed cross-section structure portion. A connecting member (for example, the connecting member 41 in the embodiment) is provided, and the closed closed cross-section structure portion and the closed cross-section of the roof side are adjacent to each other to form a double closed cross-section (for example, the connected closed cross-section in the embodiment). A structure portion X and a closed cross-section structure portion Y), and an attachment portion (example) of a tailgate hinge (for example, the tailgate hinge 4 in the embodiment) to the connecting member If, characterized in that setting the mounting holes 3, 3) in the embodiment.
With this configuration, it is possible to share the load from the tailgate acting on the tailgate mounting opening to the roof side, which is the skeleton portion of the vehicle body side, via the connecting member.
In addition, a connecting member that shares the load acting on the tailgate hinge to the roof side can be effectively used as a tailgate hinge mounting member.
Further, since the connecting member is superposed on the closed cross-section structure portion, the load from the tailgate supported by the tailgate hinge can be applied to the connected closed cross-section structure portion and the closed cross-section structure portion without any deviation.
Further, it is possible to distribute and transmit the load input from the side portion of the closed cross-section structure portion to the upper side portion of the closed cross-section structure portion and the connected closed cross-section structure portion.

The invention described in claim 2 is characterized in that the attachment portion of the tailgate hinge is provided in the closed section structure portion and the overlapping portion of the connecting member (for example, the overlapping portion RA in the embodiment).
By comprising in this way, the load from the tailgate supported by the said tailgate hinge can be made to act on a connection member and a closed cross-section structure part evenly.

According to a third aspect of the present invention, the connecting member is formed in a U-shaped cross-sectional shape in which a vertical wall joined to the roof side inner is connected to both ends of the upper wall, and the vertical wall of the connecting member is closed. It connects to the said roof side so that the side part of a cross-section structure part may be followed.

According to the first and third aspects of the invention, it is possible to share the load from the tailgate acting on the peripheral edge of the tailgate mounting opening to the roof side which is the skeleton part of the vehicle body via the connecting member. Therefore, the vehicle body rigidity around the tailgate can be improved.
Further, since the connecting member for sharing the load acting on the tail gate hinge on the roof side can be effectively used as a mounting member for the tail gate hinge, it is not necessary to provide a separate hinge bracket, thereby suppressing the increase in the weight of the vehicle body and improving the fuel efficiency. There is an effect that can.
Further, since the connecting member is superposed on the closed cross-section structure portion, the load from the tailgate supported by the tailgate hinge can be applied to the connected closed cross-section structure portion and the closed cross-section structure portion without any bias. The load can be evenly transmitted to the roof side and the periphery of the tailgate mounting opening, which is advantageous in terms of strength and rigidity of the vehicle body.
In addition, since it is possible to distribute and transmit the load input from the side portion of the closed cross-section structure portion to the upper side portion of the closed cross-section structure portion and the connected closed cross-section structure portion, there is a burden on each portion. As a result, the vehicle body rigidity around the tailgate can be improved.

According to the invention described in claim 2, since that can be made to act evenly the load from the tailgate to be supported on the tailgate hinge and connecting member and the closed cross section portion, and the roof side of the load Transmission to the periphery of the tailgate mounting opening can be even.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a rear body structure of a van type vehicle according to an embodiment of the present invention.
In the figure, a tailgate mounting opening 1 is formed in the rear part of the vehicle body, and a tailgate 2 as a back door is vertically moved around a tailgate hinge 4 mounted in a mounting hole 3 of a connecting member 41 described later. It is attached so that it can be opened and closed in the direction.

The peripheral edge of the tailgate mounting opening 1 is formed in a closed cross-sectional structure over the entire circumference, thereby enhancing the strength rigidity of the rear part of the vehicle body and ensuring the support rigidity of the tailgate 2.
Specifically, as shown in FIG. 2, a lower closed cross-section structure portion U is formed by a rear stiffener 5 and a rear panel 6 formed in an L-shaped cross section at the lower side of the tailgate mounting opening 1. Yes. A rear closed flange structure portion U is formed by joining the rear edge flange portion 9 and the lower wall portion 10 of the rear panel 6 to the rear edge flange portion 7 and the lower edge flange portion 8 of the rear stiffener 5. A rear edge flange portion 13 of the floor panel 12 is joined to the lower edge 11 of the lower wall portion 10 of the rear panel 6.

  Then, the lower side of the tailgate mounting opening 1 rises upward at the left and right ends. For example, as shown in FIG. 3, the left closed cross-section structure portion L on the left side of the tailgate mounting opening 1 is shown. Is formed continuously.

  That is, in the connecting portion 15 between the lower closed cross-section structure portion U and the left closed cross-section structure portion L shown in FIG. 3, the lower edge of the rear inner 16 constituting the left closed cross-section structure portion L and the lower closed cross-section structure portion U are formed. The side edge of the rear stiffener 5 to be joined and the lower edge of the rear pillar stiffener 17 constituting the left closed cross-section structure portion L and the side edge of the rear panel 6 constituting the lower closed cross-section structure portion U are joined to The cross-sectional structure portion L and the lower closed cross-section structure portion U are continuously joined. Here, the outer wall of the left closed cross-section structure portion L is formed by an outer panel 18 that constitutes the rear side wall of the vehicle body. A right closed cross-section structure portion R having the same configuration as the left closed cross-section structure portion L is also formed on the right side portion of the tailgate mounting opening 1, and the lower closed cross-section structure portion R is similarly closed at the bottom. The right side portion of the cross-sectional structure portion U is joined, but the structure is the same except that the left and right sides are reversed.

  As shown in FIG. 4, on the left side portion of the tailgate mounting opening 1, both side edge flange portions 19 and 20 of the rear pillar stiffener 17 are connected to the rear inner 16 from the upper side and the inner edge of the rear inner 16 in the vehicle width direction. 21 and the rear inner stiffener 17 and the rear pillar stiffener 17 form a left closed cross-section structure portion L. This left closed cross-section structure portion L is continuous with the lower closed cross-section structure portion U. Further, the inner edge flange portion 20 of the rear garter 22 is joined to the inner edge flange portion 20 of the rear pillar stiffener 17, and the outer edge portion 24 of the rear garter 22 is raised and formed therein, and here the inner edge flange portion 25 of the outer panel 18. Are joined. An outer edge flange portion 27 of the rear inner 16 is joined to the outer edge flange portion 26 of the outer panel 18.

  And the left closed cross-section structure part L comprised in this way curves inward in the upper part, and as shown in FIG. 5, it continues to the upper closed cross-section structure part H formed of the rear rail lower 30 and the rear rail upper 31 Is formed. Specifically, the rear edge flange portion 33 of the rear rail upper 31 having a hat-shaped cross-section is joined to the rear edge portion 32 of the rear rail lower 30, and the front edge flange portion 34 of the rear rail upper 31 is substantially centered in the front-rear direction of the rear rail lower 30. Are joined together to form an upper closed cross-section structure portion H.

  Here, as shown in FIG. 6, the rear pillar stiffener 17 is formed in an inwardly curved shape at the corner portion from the left closed cross-section structure portion L to the upper closed cross-section structure portion H, and smoothly the left closed cross-section structure. It is possible to shift from the portion L to the upper closed cross-section structure portion H. The rear pillar stiffener 17 is divided at the corner portion and connected to the upper closed cross-section structure H. In FIG. 5, the rear edge flange portion 36 of the roof 35 is joined to the rear edge portion 32 of the rear rail lower 30 and the rear edge flange portion 33 of the rear rail upper 31 constituting the rear portion of the roof 35.

  As shown in FIG. 6, a connecting member 41 that connects a portion reaching the roof side inner 40 is provided at a corner portion of the left closed cross-section structure portion L. The roof side inner 40 is a member that is formed to wrap around the rear portion of the roof 35 and is connected to the rear rail lower 30 at a boundary portion shown in FIG. Specifically, the connecting member 41 is a hat-shaped member (the cross-sectional shape is indicated by a chain line), the outer flange portion 42 is welded to the roof side inner 40, and the vertical wall 43 outside the vehicle compartment is It is formed along the vertical wall 44 of the roof side inner 40 and the vertical wall 45 of the rear pillar stiffener 17, and the front edge 47 of the upper wall 46 is joined to the front edge flange portion 48 of the roof side inner 40. Further, the vertical wall 49 on the vehicle interior side is provided with a flange portion 52 that is joined to the vertical wall 50 and the bottom wall 51 of the roof side inner 40. Therefore, the connected closed cross-section structure portion X connected to the left closed cross-section structure portion L so as to branch from the corner portion of the left closed cross-section structure portion L between the connecting member 41 and the bottom wall 51 of the roof side inner 40. Will be formed.

  Further, mounting holes 3 and 3 for the tailgate hinge 4 are formed in the upper wall 46 of the connecting member 41. Here, the lower mounting hole 3 out of the mounting holes 3 and 3 is formed in the overlapping portion RA (shown by hatching) with the upper wall 53 of the rear pillar stiffener 17. In addition, a mounting seat 54 is formed on the upper wall 46 of the connecting member 41 so that the periphery of the mounting holes 3 and 3 is slightly higher.

  Therefore, as shown in FIG. 6 (indicated by a chain line) and FIGS. 7 to 10, when the outer panel 18 is joined to a portion extending from the roof side inner 40 to the rear pillar stiffener 17, the roof side inner as shown in FIG. 7. 8 and a portion formed by the outer panel 18 as shown in FIG. 8, a portion formed by the rear inner 16 and the vertical wall 43 of the connecting member 41 and the outer panel 18 as shown in FIG. 8, and a rear inner 16 as shown in FIG. A closed section structure portion Y is formed across the vertical wall 45 of the rear pillar stiffener 17, the portion formed by the rear garter 22 and the outer panel 18. As a result, the left closed cross-section structure portion L and the connected closed cross-section structure portion X connected to the left closed cross-section structure portion L are arranged adjacent to each other along the closed cross-section structure portion Y.

  According to the above embodiment, the peripheral edge of the tailgate mounting opening 1 is continuously extended over the entire circumference by the upper closed cross-section structure H, the left and right closed cross-section structures L and R on both sides, and the lower closed cross-section structure U. A connecting member 41 that can be formed into a closed cross-section structure to increase the strength and rigidity of the periphery of the tailgate mounting opening 1 and that connects the upper corner portions of the left and right closed cross-section structures L and R to the roof side inner 40. By providing the load, the load from the tailgate 2 acting on the tailgate mounting opening 1 can be shared through the connecting member 41 to the closed cross-section structure portion Y on the roof side that is the skeleton portion of the vehicle body side portion. . As a result, the rigidity of the vehicle body around the tailgate 2 can be improved.

  Further, since the attachment holes 3 and 3 of the tailgate hinge 4 are set in the connecting member 41, the connecting member 41 for sharing the load acting on the tailgate hinge 4 on the roof side is attached to the tailgate hinge 4. Therefore, it is not necessary to provide a separate hinge bracket, and the weight of the vehicle body can be reduced accordingly.

  The lower mounting hole 3 of the mounting holes 3 of the tailgate hinge 4 is provided in the left and right closed cross-section structures L and R and the overlapping portion RA of the connecting member 41, thereby being supported by the tailgate hinge 4. The load from the tailgate 2 can be applied to the connected closed cross-section structure portion X and the left and right closed cross-section structure portions L and R without any bias. Accordingly, the load can be evenly transmitted to the closed cross-section structure portion Y on the roof side and the closed cross-section structure portion on the periphery of the tailgate attachment opening 1, which is advantageous in terms of strength and rigidity of the vehicle body.

  Further, the connecting member 41 forms a connected closed cross-section structure portion X between the rear portion of the roof 35 and the roof side inner 40 provided in the vehicle width direction, and the connected closed cross-section structure portion X is connected to the left and right closed cross-section structure portions. By connecting to the roof side inner 40 along L and R, the load input from the left and right closed cross-section structure portions L and R is applied to the upper closed cross-section structure portion H and the connected closed cross-section structure portion X. It is possible to distribute and transmit. Therefore, the burden on each part is reduced, and the rigidity of the vehicle body around the tailgate 2 can be improved. In particular, the connection closed cross-section structure portion X is polymerized adjacent to the left and right closed cross-section structure portions L and R adjacent to the closed cross-section structure portion Y directed rearward from the roof side portion. In addition, the load is surely shared, so that the rigidity of the vehicle body around the tailgate 2 can be improved.

  Since the tailgate hinge 4 is attached to the connecting member 41 that serves as a reference for attaching the outer panel 18, for example, the rear rail lower 30, the rear rail upper 31, and the like are attached later and the roof 35 is likely to contain accumulated errors. Compared with the case where the tailgate hinge 4 is attached to the outer panel 18, there is almost no error with the outer panel 18, so that the installation accuracy can be improved and the ease of assembly can be improved.

It is a perspective view of the vehicle rear part of an embodiment of this invention. It is sectional drawing which follows the 2-2 line of FIG. It is the figure which looked at the connection part of the lower left from the vehicle interior side. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is sectional drawing which follows the 5-5 line of FIG. It is a perspective view at the upper left of the tailgate mounting opening. It is sectional drawing which follows the 7-7 line | wire of FIG. It is sectional drawing which follows the 8-8 line of FIG. It is sectional drawing which follows the 9-9 line | wire of FIG. It is sectional drawing which follows the 10-10 line of FIG.

Explanation of symbols

1 Tailgate mounting opening 3 Mounting hole (mounting part)
4 Tailgate hinge 35 Roof 40 Roof side inner (roof side)
41 connecting member RA overlapping portion H upper closed cross-section structure portion L, R left and right closed cross-section structure portion U lower closed cross-section structure portion X connection closed cross-section structure portion

Claims (3)

The peripheral edge of the tailgate mounting opening is formed in a closed cross-sectional structure over the entire circumference, and the closed cross-section (Y) of the roof side is formed on the peripheral edge of the tailgate mounting opening. (L) is continued to the side, the side portion (L) of the closed cross-section structure portion and the closed cross-section (Y) of the roof side are adjacent to form a double closed cross-section (LY),
The closed cross-section structure portion is superposed and joined to the roof side inner part of the rear portion of the roof to form a connected closed cross-section structure portion (X), and the connected closed cross-section structure portion (X) is connected to the side of the closed cross-section structure portion. A connecting member that connects the closed cross-section structure portion and the roof side by connecting to the roof side along the portion (L) is provided, and the closed cross-section structure of the connection closed cross-section structure portion (X) and the roof side is provided. (Y) is adjacent to form a double closed section (XY),
A rear vehicle body structure characterized in that an attachment portion of a tailgate hinge is set in the connecting member . Rear vehicle body structure according to claim 1, characterized in that a mounting portion of the tailgate hinge overlapping portion of the connecting member and the closed cross section portion. The connecting member is formed in a U-shaped cross-sectional shape in which a vertical wall joined to the roof side inner is connected to both ends of an upper wall, and the vertical wall of the connecting member is connected to a side portion (L 3. The rear vehicle body structure according to claim 1, wherein the rear vehicle body structure is connected to the roof side so as to extend along the vertical axis.

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