JP2018052181A - Vehicle body rear part structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body rear part structure capable of more efficiently transferring a load applied to a hinge for a tail gate to a rear pillar.SOLUTION: The vehicle body rear part structure includes: a rear roof rail 18 extending in a vehicle width direction to support a rear part of a roof panel; hinges 22 for a tail gate attached to the rear roof rail 18; a hinge mounting part 40 arranged at a connection part of the rear roof rail 18 and a rear pillar 16; and a reinforcement wall 36 located at the front of a vehicle of the hinge mounting part 40. The hinge mounting part 40 and the reinforcement wall 36 are formed by an integral member formed of an extension 38.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vehicle body rear part structure of a vehicle.

  For example, Patent Document 1 discloses that a tailgate hinge is reinforced by providing a bracket formed separately from a rear gate hinge for a vehicle. According to Patent Document 1, it is possible to increase the rigidity of the rear roof rail while suppressing the weight of the vehicle body.

JP 2014-180911 A

  By the way, in the vehicle body rear structure disclosed in Patent Document 1, since the bracket is provided separately from the tailgate hinge, the number of parts increases and the load applied to the tailgate hinge is applied to the rear pillar. It may not be transmitted efficiently.

  In addition, since the retractor of the seat belt mechanism is attached to the rear roof rail, for example, when the seat belt mechanism is operated at the time of pulling out the seat belt or at the time of collision, the load applied from the retractor to the rear fool rail is efficiently transmitted to the rear pillar. It is preferable to transmit to.

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide a vehicle body rear structure capable of more efficiently transmitting a load applied to a tailgate hinge to a rear pillar. .

  In order to achieve the above object, the present invention is a vehicle body rear structure having a rear roof rail that extends in the vehicle width direction and supports a rear portion of a roof panel, and a tailgate hinge attached to the rear roof rail. A hinge mounting portion disposed on one of the rear roof rail and the rear pillar in a contact region between the rear roof rail and the rear pillar, and a reinforcing wall positioned in front of the hinge mounting portion on the vehicle, The hinge mounting portion and the reinforcing wall are an integral member.

  In the present invention, it is possible to obtain a vehicle body rear portion structure that can more efficiently transmit the load applied to the tailgate hinge to the rear pillar.

1 is a partially broken schematic perspective view showing a rear portion of a vehicle to which a vehicle body rear structure according to an embodiment of the present invention is applied. It is a principal part enlarged plan view of the rear roof rail and rear pillar in the state which removed the roof panel. FIG. 3 is an enlarged longitudinal sectional view taken along line III-III in FIG. 2. FIG. 4 is an end view taken along line IV-IV in FIG. 2. It is a principal part expansion perspective view of a rear roof rail and a rear pillar in the state where a roof panel was removed. (A), (b) is each the expansion perspective view which looked at the reinforcement wall shown in FIG. 5 from a different angle.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In the drawing, “front and rear” indicates the vehicle longitudinal direction, “left and right” indicates the vehicle width direction (left and right direction), and “up and down” indicates the vertical vertical direction.

  As shown in FIG. 1, the vehicle 10 includes a tailgate 14 for opening and closing an opening 12 formed at the rear end of the vehicle body. On both sides of the opening 12 along the vehicle width direction, left and right rear pillars 16, 16 stand up against each other.

  A rear roof rail 18 extending in the vehicle width direction and extending between the upper ends of the left and right rear pillars 16 and 16 is provided at the rear end of the vehicle body above the opening 12. The left and right ends of the rear roof rail 18 are joined (contacted) to the upper ends of the left and right rear pillars 16, 16, respectively. In addition, a roof panel 20 that extends along the longitudinal direction of the vehicle body and forms a ceiling surface is provided at the top of the vehicle body. The rear roof rail 18 supports a vehicle rear portion (not shown) of the roof panel 20.

  As shown in FIGS. 1 and 2, left and right tailgate hinges 22, 22 are attached to the rear roof rail 18 so as to support the upper end portion of the tailgate 14 so that it can be opened and closed vertically. Each of the tailgate hinges 22 includes a gate side hinge portion (not shown), a vehicle body side hinge portion 24, and a support pin (not shown) that is a rotation shaft.

  The gate side hinge portion is fastened to the tail gate 14 side via a screw member (not shown), and is provided to be rotatable integrally with the tail gate 14. The vehicle body side hinge portion 24 is fastened and fixed to the rear roof rail 18 side via bolts 25. The support pin pivotally supports the gate side hinge portion with respect to the fixed vehicle body side hinge portion 24 so as to be rotatable.

  The rear roof rail 18 is made of, for example, a press-formed metal member, and has a substantially L-shaped cross section in the axial direction (see FIG. 3). As shown in FIG. 3, the rear roof rail 18 is located in the front of the vehicle and extends in a substantially vertical vertical direction, and is bent toward the rear of the vehicle from the lower end of the front wall 26. And a bottom wall 28. A vehicle front end portion 26 a of the front wall 26 is joined to the roof panel 20. Further, the vehicle rear end portion 28 a of the bottom wall 28 is joined to the roof panel 20.

  The seatbelt mechanism 30 includes a seatbelt (not shown) and a retractor 32 that winds up the upper end of the seatbelt so that it can be pulled out (see FIG. 2). The retractor 32 is housed in a rectangular opening 34 formed in the rear roof rail 18 and is fixed to the rear roof rail 18 via fastening members such as bolts and nuts. The opening 34 to which the retractor 32 is fixed is disposed on the inner side in the vehicle width direction of a reinforcing wall 36 described later.

  Each of the left and right rear pillars 16 has a symmetrical shape, and, as shown in FIG. 4, a rear pillar inner 16a on the passenger compartment side and a rear pillar outer 16b on the outer side of the vehicle are joined to form a closed section 16c. By configuring the closed section 16c, the rigidity and strength of each rear pillar 16 can be improved.

  An extension 38 is provided at the overlapping portion (joining portion) of the right end portion of the rear roof rail 18 and the upper end portion of the right rear pillar 16 (see FIGS. 2 and 5). The extension 38 is made of, for example, a press-molded product that has been press-molded, and has a substantially L shape in plan view (see FIG. 2). The extension 38 extends from the right rear pillar 16 having a closed cross section 16 c and forms a right corner portion of the rear portion of the vehicle body with the rear roof rail 18. In the present embodiment, the extension 38 is arranged only on the right side of the rear part of the vehicle body. However, for example, the extensions 38, 38 may be arranged on both the left and right sides of the rear part of the vehicle body.

  The extension 38 includes a reinforcing wall 36, a hinge mounting portion 40, and a coupling portion 42. The reinforcing wall 36 is positioned in front of the vehicle with respect to the hinge mounting portion 40 and is formed integrally with the hinge mounting portion. In other words, the reinforcing wall 36 is integrally provided at a position in front of the hinge mounting portion 40 in the vehicle longitudinal direction of the extension 38. As shown in FIG. 2, in the extension 38, the reinforcing wall 36 is disposed at a position close to the right rear pillar 16 from the center in the vehicle width direction on the front side of the vehicle in a plan view.

  In the present embodiment, the hinge mounting portion 40 and the reinforcing wall 36 are integrally formed with respect to the extension 38, but the present invention is not limited to this. For example, the hinge mounting portion 40 and the reinforcing wall 36 may be configured integrally with the rear roof rail 18 or may be configured integrally with the rear pillar 16.

  As shown in FIGS. 3, 6 (a), and 6 (b), the reinforcing wall 36 has a substantially triangular shape when viewed from the side in the vehicle width direction. The reinforcing wall 36 falls from the upper portion of the front wall 26 of the rear roof rail 18 to the vertical side 44, the horizontal side 46 on the bottom wall 28 side, and the lower side of the vertical side 44 toward the vehicle rear end of the horizontal side 46. It has a hypotenuse 48, a back side vertical side 50 that is closer to the rear pillar 16 to the right of the vertical side 44, and a slope 52 that connects the back side vertical side 50, the horizontal side 46, and the hypotenuse 48.

  The lateral side 46 is not parallel to the vehicle front-rear direction, but obliquely (inward in the vehicle width direction) so as to gradually approach the right rear pillar 16 from the vehicle front end 46a of the lateral side 46 toward the vehicle rear end 46b. (Direction toward the outside) (see FIG. 2). The hypotenuse 48 has a flange portion 54 extending from the front wall 26 side to the bottom wall 28 side. Furthermore, the inclined surface 52 has a triangular shape when viewed from the outside in the vehicle width direction, and is inclined inward in the vehicle width direction toward the top (see FIG. 2).

  Between the roof panel 20 and the rear roof rail 18, a space 56 (see FIG. 3) surrounded by the reinforcing wall 36 and the front wall 26 and the bottom wall 28 of the rear roof rail 18 is formed. The space 56 is formed so that its volume gradually decreases toward the outside in the vehicle width direction. The narrowest point (part) 58 (same as the intersection 58 described later) of the space 56 is formed so as to be continuous with the ridge line 60 of the right rear pillar 16 (FIG. 6A, FIG. 6). b)).

  The coupling portion 42 is formed by three members, which are an extension 38, a right end portion of the rear roof rail 18, and an upper end portion of the right rear pillar 16, being fastened together via bolts 62a and nuts 62b. One is integrally connected (bolt fastening). The coupling portion 42 is located in the vicinity of an intersection 58 where the reinforcing wall 36 and the ridge line 60 of the right rear pillar 16 intersect (see FIGS. 6A and 6B).

  The coupling portion 42 functions as a coupling portion that couples the rear roof rail 18 and the rear pillar 16. In addition, the vehicle front end portion 38a and the vehicle rear end portion 38b of the extension 38 are joined to the rear roof rail 18 and the right rear pillar 16 by spot welding or the like.

  As shown in FIGS. 2 and 5, the hinge mounting portion 40 has a substantially semi-oval shape in plan view and has a raised portion that protrudes upward. The hinge attachment portion 40 is formed with a mounting hole (not shown) for mounting the vehicle body side hinge portion 24. A bead 66 is provided on the rear roof rail 18 located below the hinge mounting portion 40. The bead 66 extends from the hinge mounting portion 40 toward the opening 34 for mounting the retractor 32, and is formed so as to intersect the vehicle width direction. In addition, another bead 68 extending substantially parallel to the bead 66 is provided on the vehicle front end side of the rear roof rail 18.

  The beads 66 and the other beads 68 are formed as recesses that are recessed from the upper surface side of the rear roof rail 18 toward the lower surface side. On the contrary, from the lower surface side of the rear rule rail 18 to the upper surface side. You may form by the convex part which bulges toward.

  The vehicle 10 to which the vehicle body rear part structure according to the present embodiment is applied is basically configured as described above. Next, the function and effect will be described.

  In the present embodiment, the reinforcement wall 36 is integrally provided at the vehicle front position of the hinge mounting portion 40, whereby the number of parts can be reduced and the weight of the vehicle 10 can be reduced. Further, in the present embodiment, by integrally configuring the hinge mounting portion 40 and the reinforcing wall 36, the load applied from the tailgate 14 to the hinge mounting portion 40 and the load applied to the mounting location of the retractor 32 are as follows. Transmission to the rear pillar 16 can be performed more efficiently via the reinforcing wall 36 having a simple configuration. On the other hand, for example, when the hinge mounting portion 40 and the reinforcing wall 36 are configured separately, a load transmission loss occurs between the hinge mounting portion 40 and the reinforcing wall 36, and the load is efficiently transmitted to the rear pillar 16. Transmission is suppressed.

  Further, in the present embodiment, a space portion 56 surrounded by the reinforcing wall 36 and the front wall 26 and the bottom wall 28 of the rear roof rail 18 is formed. Thus, in the present embodiment, the space 56 extending outward in the vehicle width direction is continued to the ridge line 60 of the rear pillar 16 so that the stress (load) applied from the retractor 32 when the seat belt is pulled out has a high strength rear pillar. It is possible to concentrate on 16 ridge lines 60. As a result, in this embodiment, the stress (load) applied from the retractor 32 can be efficiently transmitted to the rear pillar 16.

  Furthermore, in the present embodiment, there is provided a coupling portion 42 in which three members including an extension 38, a right end portion of the rear roof rail 18, and an upper end portion of the right rear pillar 16 are fastened together. In the present embodiment, the coupling portion 42 is located in the vicinity of the intersection 58 where the reinforcing wall 36 and the ridge line 60 of the right rear pillar 16 intersect, and thus, for example, stress (load) applied from the retractor 32. The load can be distributed to a plurality of other elements around the ridge line 60 of the rear pillar 16 having a high strength. As a result, in this embodiment, the transmission of stress (load) concentrated on the ridge line 60 of the rear pillar 16 to the rear pillar 16 can be efficiently promoted.

  Furthermore, in the present embodiment, the strength of the extension 38 can be improved by configuring the hinge mounting portion 40 with a raised portion that rises upward, for example, as compared with the case of being configured with a flat portion. Further, in the present embodiment, by providing the bead 66 with respect to the rear roof rail 18 positioned below the hinge mounting portion 40, the load applied to the hinge mounting portion 40 and the retractor mounting portion can be easily absorbed by the bead 66. Therefore, it can be transmitted to the rear roof rail 18 as well. The strength and rigidity of the rear roof rail 18 can be improved by providing another bead 68 substantially parallel to the bead 66.

  Furthermore, in the present embodiment, the reinforcing wall 36 is provided on the extension 38 constituting the corner portion, and the space portion 56 is formed by the reinforcing wall 36. Thereby, in this embodiment, the closed cross section 16c like the rear pillar 16 is not comprised, but the intensity | strength and rigidity of the connection part of the rear roof rail 18 and the rear pillar 16 can be improved. Moreover, in this embodiment, the load provided from the hinge attaching part 40 or the retractor 32 can be efficiently transmitted to the high-strength rear pillar 16 having the closed section 16c.

DESCRIPTION OF SYMBOLS 10 Vehicle 14 Tailgate 16 Rear pillar 18 Rear roof rail 20 Roof panel 22 Tailgate hinge 26 Front wall 28 Bottom wall 32 Retractor 36 Reinforcement wall 38 Extension 40 Hinge attachment part 42 Connection part 56 Space part 66 Bead

Claims (5)

A vehicle body rear structure having a rear roof rail extending in the vehicle width direction and supporting a rear portion of the roof panel, and a tailgate hinge attached to the rear roof rail;
A hinge mounting portion disposed on one of the rear roof rail and the rear pillar in a contact area between the rear roof rail and the rear pillar;
A reinforcing wall located in front of the hinge mounting portion of the vehicle;
With
The vehicle body rear structure, wherein the hinge mounting portion and the reinforcing wall are an integral member. The vehicle body rear structure according to claim 1,
A retractor for a seat belt mechanism disposed inside the reinforcing wall in the vehicle width direction;
The rear roof rail has a front wall and a bottom wall,
The reinforcing wall forms a space between the front wall and the bottom wall,
The vehicle body rear structure, wherein the space portion narrows toward the outside in the vehicle width direction, and the narrowest portion of the space portion is continuous with a ridge line of the rear pillar. The vehicle body rear structure according to claim 2,
A connecting portion for connecting the rear roof rail and the rear pillar;
The vehicle body rear structure, wherein the coupling portion is located in the vicinity of an intersection of the reinforcing wall and the ridge line of the rear pillar. The vehicle body rear structure according to any one of claims 1 to 3,
The hinge mounting portion has a raised portion that protrudes upward,
A rear structure of a vehicle body, wherein a bead is provided on the rear roof rail located below the hinge mounting portion. The vehicle body rear part structure according to any one of claims 1 to 4,
An extension extending from the rear pillar having a closed cross section to form a corner portion with the rear roof rail;
The vehicle body rear structure, wherein the reinforcing wall is provided on the extension.

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