JP2998371B2 - Rear body structure of vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear body structure of a vehicle, and more particularly, to a rear body structure of a vehicle relating to a joint between a rocker and a rear floor side member.

[0002]

2. Description of the Related Art Conventionally, in a rear body structure of a vehicle disclosed in Japanese Utility Model Laid-Open Publication No. 2-96283, generally, a connecting portion between a rocker and a rear floor side member is shown in FIG.
And as shown in FIG.

That is, as shown in FIG. 5, the cross-sectional shape of the front portion 70A of the rear floor side member 70 extending in the vehicle body front-rear direction when viewed from the vehicle front-rear direction has a U-shape in which the opening is directed upward in the vehicle body up-down direction. The outer wall 7 in the vehicle width direction
0B and the upper end of the vehicle width direction inner side wall 70C,
A flange 70D and a flange 70E are provided. Further, a vehicle width direction outer wall portion 70B of a front portion 70A of the rear floor side member 70 is provided with a rocker 71 extending in the vehicle longitudinal direction.
Is fixed from the vehicle width direction inner side to the vehicle width direction inner side wall portion 72A of the rocker inner panel 72 constituting the vehicle width direction inner portion, and the flange 70D of the rear floor side member 70 is attached to the upper surface portion 72B of the rocker inner panel 72 by the vehicle body. It is welded from above and below.

[0004]

However, in the rear body structure of the vehicle, as shown in FIG. 6, the front end 70F of the rear floor side member 70 is open, and the front end of the lower surface of the rear floor side member 70 is opened. Part 7
0G is welded to the lower surface portion 74A of the rear floor cross member 74 from below in the vehicle body vertical direction. The front end of the inner wall portion 70C in the vehicle width direction of the rear floor cross member 74 is bent inward in the vehicle width direction to form a flange 70H.
Is welded to the rear wall portion 74B from the rear side in the vehicle longitudinal direction.

Accordingly, in the rear body structure of the vehicle, as shown in FIG.
And the rocker 71 are not smoothly connected in the vehicle front-rear direction, and part of the load from the rear floor cross member 74 is
1 is transmitted. For this reason, the rear floor side member 7
The connection rigidity between the locker 71 and the rocker 71 tends to be low, and the plate thickness of the rear floor side member 70 and the plate thickness of the rocker inner panel 72 need to be increased in order to improve the connection rigidity.

As a structure for improving this, as shown in FIG. 7, the front portion of the inner side wall portion 80A in the vehicle width direction of the rear floor side member 80 is bent outward in the vehicle width direction, and the front end portion 80B of the rear floor side member 80 is bent. By closing, the rear floor side member 80 and the rocker 82 may be gently connected. However, in this case, the spot welding surface between the vehicle width direction inner wall portion 82A of the rocker 82 and the vehicle width direction outer wall portion 80C of the rear floor side member 80 is oriented in the direction of the axis P1 at the front of the rear floor side member 80. At an acute angle to it. Therefore, the opening width W of the rear floor side member 80 becomes narrower in the spot welding direction (the directions of arrows S1 and S2 in FIG. 7). For this reason, the welding gun for spot welding cannot be inserted into this part, and the pitch of spot welding is widened, and there is a problem that sufficient joining rigidity cannot be obtained.

In view of the above, it is an object of the present invention to provide a rear body structure of a vehicle capable of improving the rigidity of connection between a rear floor side member and a rocker without increasing weight.

[0008]

According to a first aspect of the present invention, there is provided a rear body structure of a vehicle, which extends in the front-rear direction of the vehicle and gradually moves inward in the vehicle width direction near the rear end from the vehicle front-rear direction. A rocker provided with a protruding protrusion, and a cross-sectional shape extending in the vehicle front-rear direction and having a cross-sectional shape viewed from the vehicle front-rear direction and having an upper open U-shape having a vehicle width direction outer wall portion and a vehicle width direction inner wall portion. vehicle width direction outer side wall while being connected to the to it name on the side wall portion of the top front of the front is gently curved outward in the vehicle width direction <br/> the rocker of the projecting portion of the vehicle transverse direction inner side wall portion Laka And a rear floor side member coupled to a side wall at the top rear of the rocker protrusion.

[0009]

According to the present invention having the above-described structure, at the joint between the vicinity of the rear end of the rocker extending in the vehicle longitudinal direction and the rear floor side member, the rocker is gently directed inward in the vehicle width direction from the vehicle longitudinal direction. protrudes portions are bulging formed, it in the vehicle width direction inner side wall portion of the top front of the projecting portion of the rocker in the vehicle width direction inner side wall portion a front portion of gently curved outward in the vehicle width direction of the rear floor side member it is connected to the Laka. Also,
A vehicle width direction outer wall portion of the rear floor side member is connected to a vehicle width direction inner wall portion behind the top of the protrusion of the rocker.

Therefore, the welding surface of the outer wall portion in the vehicle width direction of the rear floor side member and the inner wall portion in the vehicle width direction behind the top of the projecting portion of the rocker is perpendicular to the axial direction of the front portion of the rear floor side member. To incline. For this reason, the opening width of the front end portion of the rear floor side member becomes substantially wider in the spot welding direction. For this reason, the opening width of the front end of the rear floor side member is substantially increased. Therefore,
The joining operation can be easily performed, and the joining pitch is not widened, so that the joining rigidity between the rear floor side member and the rocker can be improved. Further, since it is not necessary to increase the thickness of the rear floor side member and the thickness of the rocker, there is no increase in weight.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the rear body structure of a vehicle according to the present invention will be described with reference to FIGS.

In the drawings, an arrow FR indicates a forward direction of the vehicle body, an arrow IN indicates an inward direction of the vehicle body, and an arrow UP indicates an upward direction of the vehicle body.

As shown in FIG. 1, a rocker 12 is disposed along the front and rear direction of the vehicle body 10 at both lower ends in the vehicle width direction of the vehicle body 10, and is disposed behind the rocker 12 along the vehicle front and rear direction. The front portion of the rear floor side member 14 is welded by spot welding. In addition, both ends in the vehicle width direction of the rear floor cross member 13 arranged along the vehicle width direction are welded to the front side of the welded portion by spot welding.

As shown in FIG. 3, the rocker 12 includes a rocker outer panel 18 forming an outer portion of the rocker 12 in the vehicle width direction, and a rocker inner panel 20 forming an inner portion of the rocker 12 in the vehicle width direction. And has a closed cross-sectional structure extending in the front-rear direction of the vehicle body. The rocker outer panel 18 has a U-shaped cross section when viewed from the vehicle front-rear direction, with an opening directed inward in the vehicle width direction, and a vertical upper flange portion 18A and a vertical lower flange portion 18 at the opening edges.
B is formed.

As shown in FIG. 4, a rear wheel house outer 24 constituting a part of the rear wheel house 15 is disposed behind the rocker outer panel 18 in the vehicle longitudinal direction. A flange 24A is provided toward the front of the vehicle body. Also,
A quarter panel 26 is disposed outside the rear wheel house outer 24 in the vehicle width direction.

As shown in FIG. 2, the quarter panel 26
Has a substantially L-shaped cross section when viewed from the front of the vehicle body. As shown in FIG. 3, the quarter panel 2
The horizontal portion 26B of the front portion 26A is welded to the horizontal surface 19A of the protrusion 19 formed on the upper surface of the rocker outer panel 18 along the rocker outer panel 18 by spot welding from above in the vehicle body vertical direction. The outer end of the horizontal portion 26B of the quarter panel 26 is bent downward in the vehicle vertical direction to form a flange 26C. The flange 26C is attached to the vertical piece 19B of the protruding portion 19 of the rocker outer panel 18 in the vehicle width direction. Are welded by spot welding.

The vertical wall 26D of the quarter panel 26
Are welded to the upper vertical flange 18A of the rocker outer panel 18 by spot welding from the outside in the vehicle width direction.

The rocker inner panel 20 has a cross section viewed from the front of the vehicle body, a cross section viewed from the front and rear direction of the vehicle having a U-shape with the opening directed outward in the vehicle width direction, and has a Has a vertical upper flange portion 20B and a vertical lower flange portion 20C.

As shown in FIG. 1, at a front portion 20A of the rocker inner panel 20, a vertical upper flange 20B and a vertical lower flange 20C are respectively connected to the rocker outer panel 18.
Are welded to the vertical upper flange 18A and the vertical lower flange 18B by spot welding.

As shown in FIG. 4, the rear portion of the rocker inner panel 20 is formed as a protruding portion 21 bulging inward in the vehicle width direction at a predetermined inclination angle, and the inner wall portion 21A of the protruding portion 21 in the vehicle width direction. The rear end is a flange 21C having an extended portion formed above the vehicle body. The upper surface 21B of the projecting portion 21 is continuous with the upper surface 20F of the front portion 20A of the rocker inner panel 20, the rear end of the upper surface 21B is bent upward, and the inner end of the vehicle body is partially connected to the flange 21C. It is a continuous flange 21D.

As shown in FIG. 2, the rear end of the vertical upper flange 20B of the rocker inner panel 20 extends upward and rearward in the vehicle longitudinal direction and is connected to the flange 21D.

As shown in FIG. 4, the connecting portion of the rocker inner panel 20 with the rear floor side member 14 is formed as a protruding portion 23 which gently bulges from the vehicle front-rear direction to the vehicle width direction inner side.

On the rear side of the rocker inner panel 20 in the front-rear direction of the vehicle body, a rear wheel house inner 32 constituting another part of the rear wheel house 15 is arranged. At the front end of the rear wheel house inner 32, a flange 32A is provided toward the front of the vehicle body, and the flange 32A is connected to the flange 2 of the rear wheel house outer 24.
4A is welded from the inside in the vehicle width direction by spot welding. The rear end of the vertical upper flange 20B of the rocker inner panel 20 and the rear end of the vertical lower flange 20C (see FIG. 2) are welded to the flange 32A from the inside in the vehicle width direction by spot welding.

The inner side wall portion 32B of the rear wheel house inner 32 in the vehicle width direction bulges inward in the vehicle width direction from the flange 32A through the curved portion 32C, and the curved portion 32C is a flange 21D of the projecting portion 21 of the rocker inner panel 20. Are welded by spot welding. The vehicle width direction inner wall portion 32B is welded to the flange 21C by spot welding. The rear floor side member 14 is located behind the rocker inner panel 20 and inside the rear wheel house inner 32 in the vehicle width direction.

As shown in FIG. 1, the rear floor side member 14 has an upwardly open U-shape having a vehicle width direction inner wall portion 14A and a vehicle width direction outer wall portion 14B when viewed from the vehicle front-rear direction. Have been. In the front portion 36 of the rear floor side member 14, the vehicle width direction inner wall portion 36A is smoothly curved outward in the vehicle width direction, and the front end portion 36B of the vehicle width direction inner wall portion 36A is protruded from the rocker inner panel 20. coupled to name but Laka the front side wall portion 23B of the top portion 23A of the part 23 are welded by spot welding. The outer wall portion 36C of the front portion 36 of the rear floor side member 14 in the vehicle width direction is formed with the protruding portion 2 of the rocker inner panel 20.
3 is welded to the lower part of the rear side wall part 23C of the top part 23A by spot welding from the inside in the vehicle width direction.

In a portion of the rear floor side member 14 which abuts on the rear portion of the protrusion 21 of the rocker inner panel 20, a vehicle width direction outer wall portion 36C extends upward to form a vehicle width direction outer wall portion 36E. . The upper end of the vehicle width direction outer wall portion 36E is bent outward in the vehicle width direction and the upper surface portion 36E is bent.
F. The rear end of the upper surface portion 36F is bent upward in the vehicle body vertical direction to form a flange 36G. The flange 36G is a flange 2 of the rocker inner panel 20.
1D is welded from the front side in the vehicle longitudinal direction. The outer end of the upper surface 36F in the vehicle width direction is bent upward to form a flange 36H. The flange 36H is welded to the rear of the flange 20B of the rocker inner panel 20 from the inside in the vehicle width direction.

The rear portion of the vehicle width direction outer wall portion 36B of the vehicle width direction outer wall portion 14B is welded to the vehicle width direction inner wall portion 32B of the rear wheel house inner 32 from the vehicle width direction inner side by spot welding. Also, the vehicle width direction outer wall portion 36A of the front portion 36 of the rear floor side member 14 and the vehicle width direction outer wall portion 1 of the rear floor side member 14 including the same.
4A is bent inward in the vehicle width direction and the flange 14
C, and the flange 14C is welded to the rear aperture 44 (see FIG. 3) by spot welding from below the vehicle body in the vertical direction.

Next, the operation of this embodiment will be described. In the rear body structure of the vehicle of the present embodiment having the above-described configuration, the rocker inner panel 20 is gently bulged inward in the vehicle width direction from the vehicle front-rear direction at the joint portion between the rocker 12 and the rear floor side member 14 so as to protrude. 23 are formed.
The vehicle width direction inner side wall portion 36A of the front portion 36 of the rear floor side member 14 is gently curved outward in the vehicle width direction, and forms a front side wall portion 23B of the top portion 23A of the protruding portion 23 of the rocker inner panel 20. it is connected to the Laka. Further, an outer side wall portion 36C of the front portion 36 of the rear floor side member 14 is welded to a lower portion of the rear side wall portion 23C of the top portion 23A of the protruding portion 23 of the rocker inner panel 20 by spot welding.

Therefore, as shown in FIG. 4, an outer side wall portion 36C of the front portion 36 of the rear floor side member 14 in the vehicle width direction.
And the welding surface with the rear side wall portion 23C of the rocker inner panel 20 is inclined in a direction orthogonal to the direction of the axis P2 of the front portion 36 of the rear floor side member 14. For this reason, the opening width W of the front end of the rear floor side member 14 becomes substantially wider with respect to the spot welding directions S1 and S2. Therefore, the welding gun can be easily inserted into this portion,
Unlike the conventional structure, the pitch of the spot welding at this portion is not widened. In this embodiment, the load from the rear floor side member 14 is
The vehicle width direction inner side wall portion 36A and the vehicle width direction outer side wall portion 36C that are smoothly connected to each other efficiently transmit the rocker 12 to the rocker 12, so that the thickness of the rear floor side member 14 and the thickness of the rocker inner panel 20 are reduced. The rear floor side member 1 is not thickened, that is, without increasing the weight.
4 and the rocker 12 can be improved in connection rigidity.

[0030]

According to the present invention, at the joint between the rocker and the rear floor side member, a projecting portion is formed by gently swelling the rocker inward in the vehicle width direction from the longitudinal direction of the vehicle body.
The front portion of the vehicle width direction inner side wall portion of the rear floor side member is gently curved outward in the vehicle width direction, causes linked to name but Laka in the vehicle width direction inner side wall portion of the top front of the rocker of the protrusion, the rear floor side Since the outer wall portion in the vehicle width direction of the member is connected to the inner wall portion in the vehicle width direction behind the top of the protrusion of the rocker, the rocker can be smoothly connected to the rear floor side member and the opening at the front end of the rear floor side member. The width is substantially wider. Therefore, the joining operation can be easily performed, and the joining pitch does not increase. For this reason,
There is an excellent effect that the coupling rigidity between the rear floor side member and the rocker can be improved without increasing the weight.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a rear body structure of a vehicle according to an embodiment of the present invention, as viewed from an obliquely front inner side of the vehicle body.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 1;

FIG. 4 is a sectional view taken along line 4-4 of FIG. 3;

FIG. 5 is a perspective view showing a rear body structure of a vehicle in a conventional example, viewed from diagonally forward inside the vehicle body.

FIG. 6 is a sectional view taken along line 6-6 in FIG. 5;

FIG. 7 is a cross-sectional view corresponding to FIG. 6, showing a rear body structure of a vehicle of another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Body 12 Rocker 14 Rear floor side member 14A Vehicle width direction inner side wall 14B Vehicle width direction outer side wall 20 Rocker inner panel 23 Projection 23A Top 23B Front side wall 23C Rear side wall 36 Front 36A Vehicle width side inner wall 36B Front end 36C Outside wall in vehicle width direction

Claims (1)

(57) [Claims] 1. A rocker provided with a protrusion extending in the vehicle longitudinal direction and gently bulging inward in the vehicle width direction near the rear end toward the inside in the vehicle width direction, and extending to the vehicle longitudinal direction and viewed from the vehicle longitudinal direction. cross-sectional shape is the front portion of the U-shaped and is vehicle width direction inner side wall portion of the upper opening and a vehicle width direction outer side wall and the vehicle width direction inner side wall portion is gently curved in the rocker in the vehicle width direction outer side by comprising a rear floor side member in the vehicle width direction outer side wall portion is coupled to the side wall of the top rear of the projecting portion of the rocker while being connected to it name on the side wall portion of the top front of the projecting portion Laka Features the rear body structure of the vehicle.