CN100390007C - The rear body structure of the vehicle - Google Patents

Abstract

A corner part above a tail gate opening includes a roof panel which forms a roof of a vehicle, a rear roof rail outer arranged in the rear of the roof panel inside a vehicle room and extending in a lateral direction of the vehicle, a rear roof rail inner connected to the rear roof rail outer so as to form a closed sectional shape, a gate pillar reinforce integrally provided with a tail gate hinge reinforce member which is projected outward, and a quarter inner extension connected to the gate pillar reinforce so as to form a closed sectional shape.

Description

The rear body structure of the vehicle

technical field

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

Background technique

As shown in FIG. 5 , the corner portion 50 located above the tailgate of the vehicle (hereinafter referred to as the corner portion 50 ) is as shown in FIG. 2 in the prior art. In FIG. 2 , the upper end of the tailgate pillar reinforcement 20 along the vehicle width inner side is welded to the rear roof outer member 21 . Moreover, in the corner portion 50, in addition to the connection between the tailgate pillar reinforcement 20 and the rear roof outer beam 21 by welding, the upper end portion of the outer side panel 41 (see FIG. 4) is also connected by welding. Fig. 4 shows a cross-sectional view along line B-B in Fig. 2 .

As shown in FIG. 4 , a tailgate hinge 44 on which a tailgate 51 is mounted is mounted on the rear roof outer cross member 21 . However, it is dangerous to directly install the tailgate hinge 44 on the rear roof outer cross member 21 due to rigidity, so after the rear roof outer member 21 is reinforced by the reinforcement member 22 of the tailgate hinge, the tailgate hinge 44 Installed on top of the tailgate hinge reinforcement member 22 .

In order to increase the rigidity of the tailgate hinge 44 on which the tailgate 51 is mounted, it is advantageous to directly attach the tailgate hinge reinforcing member 22 for reinforcing the tailgate hinge to the door pillar reinforcement 20 . However, since the rear roof outer cross member 21 is disposed between the tailgate hinge reinforcement member 22 and the door pillar reinforcement 20, in this structure, directly connecting the tailgate hinge reinforcement member 22 and the door pillar reinforcement 20 together is impossible.

Therefore, it is considered to increase the connection rigidity by further connecting the tailgate hinge reinforcement member 22 to an area where the door pillar reinforcement 20 , the rear roof outer member 21 and the outer side panel 41 have been welded. However, as shown in Figure 4, these three components have been connected together by welding in this area. If another component is welded here, considering the performance of the welded connection, it may not be possible to obtain sufficient connection stiffness. . An example of this type of vehicle rear body structure is disclosed in JP-A-11-321706.

Contents of the invention

In the vehicle rear body structure disclosed in JP-A-11-321706, as shown in FIG. 4, a door pillar reinforcement 20 and a tailgate hinge reinforcement member 22 are formed as separate members. The tailgate hinge reinforcement member 22 must be joined to the rear roof outer cross member 21 by welding. However, due to the welded connection, the connection area between the tailgate hinge reinforcement 22 and the rear roof outer cross member 21 can only be stiffened to a limited extent.

Also, the load from the tailgate 51 that has been installed on the tailgate hinge 44, and the load from the seat belt (not shown in the figure) installed on the seat belt anchor 23, will act on the door post. Reinforcement 20 on. Therefore, loads from the tailgate 51 and the seat belt are concentrated on the corner portion 50 . However, it may be difficult to obtain sufficient connection rigidity in the structure in which the door pillar reinforcement 20 is connected to the rear roof outer member 21 by welding in the connection region 24 .

The object of the present invention is to provide a rear body structure in which the rigidity of the corner portion can be enhanced more than the rear body structure mentioned in the background art without increasing the number of parts and cost.

According to one aspect of the present invention, a rear body structure of a vehicle is proposed, including: a roof panel constituting a roof; a rear roof outer cross member disposed at the rear of the roof panel in the compartment and extending along the width of the vehicle. direction; the rear roof inner beam is connected with the rear roof outer beam to form a closed cross-sectional shape; the door pillar reinforcement, the upper part of which is integrally formed with a tailgate hinge reinforcement member, is located along the vehicle width direction The side end portion of the inner side of the tailgate hinge reinforcement member is connected together with the side end portion of the rear roof outer cross member; and the corner inner extension portion is connected together with the door pillar reinforcement to form a closed cross-sectional shape.

According to another aspect of the present invention, in the vehicle rear body structure mentioned in the preceding aspect, the door pillar reinforcement is formed in a substantially Y shape.

According to a third aspect of the present invention, in the vehicle rear body structure mentioned in the preceding aspect, the position where the corner inner extension and the rear roof inner cross member are connected together is provided at a distance from the door pillar reinforcement and the rear roof. The inner side in the vehicle width direction of the position where the outer cross members are connected together, so as to realize the connection between the tailgate hinge reinforcement member and the tailgate hinge, the connection between the door pillar reinforcement and the rear roof outer cross member, and the connection between the door pillar reinforcement and the rear roof outer cross member. Connection between outer panels.

According to the above aspect, the load from the tailgate borne by the tailgate hinge reinforcement member welded to the rear roof outer cross member in the background art can be made possible by making the door pillar reinforcement and the tailgate hinge reinforcement member an integral structure. Directly borne by the tailgate reinforcement. This load will be borne by the door pillar reinforcement extending in the vertical direction (vehicle height direction), rather than by the rear roof outer beam extending in the transverse direction (vehicle width direction), thus, a higher rigidity.

Also, by making the door pillar reinforcement and the tailgate hinge reinforcement member an integral structure, the number of parts can be reduced and the wall thickness can be reduced, so that the weight and cost of the vehicle body can also be reduced compared with the conventional vehicle rear body structure. reduce.

According to the above aspect, after the door pillar reinforcement is made into a Y shape, the load from the tailgate installed on the door hinge, and the load of the seat belt installed on the door pillar reinforcement can be effectively distributed to different parts. parts.

According to the above aspect, after the door pillar reinforcement and the rear roof outer member are connected together, the corner inner extension and the rear roof inner member do not interfere with the connection. Therefore, the connection work between the tailgate hinge reinforcement member and the tailgate hinge, the connection work between the door pillar reinforcement and the rear roof outer cross member, and the connection work between the door pillar reinforcement and the outer panel can be easily performed .

Description of drawings

FIG. 1 is a perspective view of a vehicle rear body structure according to an embodiment of the present invention.

FIG. 2 is a perspective view of a vehicle rear body structure related to the background art.

Fig. 3 is a cross-sectional view along line A-A of the vehicle rear body structure of the embodiment of the present invention in Fig. 1 .

FIG. 4 is a cross-sectional view of the conventional vehicle rear body structure in FIG. 2 along line B-B.

Fig. 5 is a perspective view of the rear body structure of the vehicle.

Detailed ways

Next, the vehicle rear body structure will be described with reference to FIGS. 1 to 5 . FIG. 1 is a perspective view of a vehicle rear body structure according to an embodiment of the present invention. FIG. 2 is a perspective view of a conventional vehicle rear body structure. Fig. 3 is a sectional view along the line A-A of the vehicle rear body structure according to the embodiment of the present invention shown in Fig. 1 . FIG. 4 is a cross-sectional view of the conventional vehicle rear body structure in FIG. 2 along line B-B. Fig. 5 is a perspective view of the rear body structure of the vehicle. Front (Fr), inner (In) and upper (Up) arrows in the figure indicate the front of the vehicle, the inner side in the vehicle width direction, and the upper side of the vehicle, respectively.

As shown in FIG. 1, the door pillar reinforcement 10 is formed into a substantially Y shape so that it can be connected to the rear roof outer beam 11 in the vehicle width direction, connected to the side roof beams in the vehicle longitudinal direction, and connected to the side roof beams in the vehicle vertical direction. The upper and lower body frame members are connected. The door pillar reinforcement 10 is welded to the rear roof outer cross member in such a way that the upper side end region 13 of the door pillar reinforcement 10 is arranged below the rear roof outer cross member 11 on the inner side in the vehicle width direction.

In the vehicle longitudinal (front-rear) direction, at the upper side end regions 14 of the door-pillar reinforcement 10, the door-pillar reinforcement 10 is welded to a side roof cross member (not shown) in the following manner: The door-pillar reinforcement The member 10 is arranged under the side roof cross member. The lower end 15 of the door pillar reinforcement 10 is connected to the lower vehicle body frame member (not shown in the figure) by welding. Fig. 3 is a sectional view taken along line A-A of Fig. 1 .

As shown in FIG. 3 , a tailgate hinge reinforcement member 12 is provided at an upper end portion of the door pillar reinforcement 10 . The door pillar reinforcement 10 and the rear roof outer member 11 are also connected together by welding at a connection region 13 located inside in the vehicle width direction where the above-mentioned tailgate hinge reinforcement member 12 is provided.

Also, in the connection region 36 located outside in the vehicle width direction from the position where the above-mentioned tailgate hinge reinforcement member 12 is provided, the door pillar reinforcement 10 is connected to the outer panel 31 by welding there.

In this way, the connection region 13 where the door pillar reinforcement 10 and the rear roof outer cross member 11 are connected together by welding and the connection region 36 where the door pillar reinforcement 10 and the outer side panel 31 are connected together by welding are provided in different positions. Location. As a result, compared with the conventional structure in which the door pillar reinforcement 20, the rear roof outer cross member 21 and the outer side panel 41 are welded together at the same position in the connection area 24 as shown in FIG. Good connection stiffness.

In addition, compared with the conventional structure in which the door pillar reinforcement 20 and the rear roof outer cross member 1 are connected together by welding at the corner portion 50 as shown in FIG. Composition, this structure can obtain better reinforcement stiffness.

A tailgate hinge 34 is mounted on the upper portion of the tailgate hinge reinforcement member 12 , and the tailgate hinge 34 is fixed to the upper portion of the tailgate hinge reinforcement member 12 by bolts 37 . In this case, the roof panel 30 is arranged between the tailgate hinge reinforcement member 12 and the tailgate hinge 34 and fixed with the bolt 37, so that the roof panel 30 can also be connected to the tailgate hinge reinforcement member 12 at the same time. .

Then, a tailgate 51 (shown in FIG. 5 ) is mounted on the tailgate hinge 34 that has been mounted on the upper portion of the tailgate hinge reinforcement member 12 . The load acting on the tailgate hinge reinforcement member 12 from the tailgate 51 can be effectively distributed to the Y-shaped portion 17 of the door pillar reinforcement 10 . In this way, the component of the load along the Z-axis direction will be borne by the door pillar reinforcement 10 extending in the vertical direction of the vehicle (the Z-axis direction, that is, the upper and lower directions), while the component of the load along the X-axis direction The component will be borne by roof side members (not shown) extending in the longitudinal direction of the vehicle (the X-axis direction, ie, the front-to-rear direction).

In this way, the load component along the Z-axis direction from the tailgate 51 that can generate a large force can no longer be borne by the rear roof outer beam 11 extending along the vehicle width direction as in the conventional structure, but It is borne by the door pillar reinforcement 10 extending in the vertical direction of the vehicle body. As a result of this, increased stiffness can be obtained compared to conventional structures.

At a position on the door pillar reinforcement 10 opposite to the interior of the vehicle compartment, a seat belt anchor 16 for fixing a seat belt is installed. The load of the seat belt (not shown) on the seat belt anchor 16 will be effectively distributed to the Y-shaped configuration of the door post reinforcement. The component of the load along the X axis will be borne by the roof side beams (not shown) extending along the longitudinal direction of the vehicle (the X axis direction, that is, the front and rear direction of the vehicle body), and the component of the load along the Y axis will be borne by The rear roof outer beam 11 extending laterally (the Y-axis direction, that is, the vehicle width direction) bears the responsibility.

On the side opposite to the compartment interior, the corner inner extension upper part 33 is welded together with the door pillar reinforcement 10 to form a closed cross-sectional shape, and on the side opposite to the compartment interior, the rear roof inner cross member 32 is connected together with the rear roof outer beam 11 by welding to form a closed cross-sectional shape. One end of the upper portion 33 of the corner inner extension is connected to one end of the rear inner roof cross member 32 by welding in the following manner: said end of the rear roof inner cross member 32 is arranged on the corner inner extension above the end of the upper part 33 .

The position where the end portion of the corner inner extension upper portion 33 and the end portion of the rear roof inner member 32 are welded together is located opposite to the position where the door pillar reinforcement 10 and the rear roof outer member 11 are welded together in the vehicle width direction. inside. In this way, the position where the end of the upper portion 33 of the corner inner extension and the end of the rear inner roof cross member 32 are connected together by welding, and the door pillar reinforcement 10 and the rear roof outer member 11 are connected by welding The positions together are arranged in different positions along the width direction of the vehicle.

After the door pillar reinforcement 10 and the rear roof outer cross member 11 have been connected together by welding, by welding the ends of the corner inner extension upper part 33 and the end of the rear roof inner cross member 32 together by welding, for An open space of the upper part 33 of the inner extension of the corner is formed.

Using this open space, it is possible to complete the welding work connecting the door pillar reinforcement 10 and the rear roof outer beam 11, the welding work between the door pillar reinforcement 10 and the outer panel 31, and the door pillar reinforcement 10, the vehicle The work of connecting with bolts between the top plate 30 and the tailgate hinge 34 is carried out.

In this way, the work of connecting the door pillar reinforcement 10 and the rear roof outer cross member 11 by welding, the work of welding the door pillar reinforcement 10 to the outer side panel 31, and the work of bolting the door pillar reinforcement 10 and the tailgate hinge 34 work fixed together can be easily achieved.

Claims (3)

1. A rear body structure surrounding a tailgate in the rear of a vehicle, characterized in that it comprises: the roof panel forming the roof of the vehicle; the rear roof outer beam is arranged at the rear of the roof panel in the compartment, and the rear roof outer beam extends along the vehicle width direction; an inner beam of the rear roof connected to the outer beam of the rear roof to form a closed cross-sectional shape; A door pillar reinforcement, the upper part of which is integrally formed with a tailgate hinge reinforcement member, and the side end portion of the door pillar reinforcement located inside the tailgate hinge reinforcement member in the vehicle width direction is connected to the side end portion of the rear roof outer cross member ;as well as The inner extension of the corner is connected to the door post reinforcement so as to form a closed cross-sectional shape. 2. The rear body structure of a vehicle according to claim 1, wherein the door pillar reinforcement forms a substantially Y shape. 3. The rear body structure of a vehicle according to claim 1 or 2, wherein the position where the corner inner extension and the rear roof inner rail are connected together is located between the door pillar reinforcement and the rear The inner side along the vehicle width direction of the position where the roof outer beams are connected together, wherein the tailgate hinge reinforcement member is connected to the tailgate hinge, and Wherein the door post reinforcement is connected to the outer panel.

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