JPH10278846A - Rear body structure of vehicle - Google Patents

Abstract

(57) [Problem] To improve the coupling rigidity between the rear part of a rocker and the front part of a rear floor side member. A load input from a rear suspension and transmitted to a rear floor side member (30) is transmitted to a rocker inner panel (16) from a joint between a front portion (30D) of the rear floor side member (30) and a rocker inner panel (16). Upper wall 30 of rear floor side member 30
E, outer widthwise edge 30F and rocker inner panel 16
The upper wall portion 16B is also transmitted to the vertical wall portion 14C of the outer rocker panel 14 via the rocker reinforcement 34. For this reason,
The load transmitted to the rear floor side member 30 can be efficiently transmitted to the rear portion of the rocker 12.

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 connecting a rear portion of a rocker and a front portion of a rear floor side member.

[0002]

2. Description of the Related Art Conventionally, as an example of a rear body structure of a vehicle connecting a rear portion of a rocker and a front portion of a rear floor side member, a structure disclosed in Japanese Utility Model Laid-Open No. 1-167575 is known.

As shown in FIG. 4, in the rear body structure of the vehicle, a rocker closed cross section 1 extending in the vehicle front-rear direction by a rocker outer panel 100 and a rocker inner panel 102.
The front part 10 of the rear floor side member 108 is provided inside the rear part 106A of the rocker 106 in which the
8A is bound. Rear floor side member 108
The cross-sectional shape of the front portion 108A when viewed from the front side of the vehicle has a U-shape with the opening facing outward in the vehicle width direction, and the vehicle width direction outer edge 108B of the upper wall portion is formed by the rocker inner panel 1.
A lower flange 108C formed on the upper wall portion 102A of the vehicle 02 in the vehicle width direction outer edge of the lower wall portion downward is connected to the lower edge portion 102B of the rocker inner panel 102.

[0004]

However, in the rear body structure of the vehicle, the rear floor side member 108 is not provided.
Is connected to the rocker inner panel 102 but is not connected to the rocker outer panel 100. Therefore, the load from the front portion 108A of the rear floor side member 108 is received only by the rocker inner panel 102, and is received by the rocker outer panel 100 via the rocker inner panel 102.
06A and front 108A of rear floor side member 108
Is not sufficiently rigid. As a result, the load input from the rear suspension and transmitted to the rear floor side member 108 at the time of cornering, lane change, or the like is not efficiently transmitted to the rocker 106, and the operability is reduced.

The present invention has been made in view of the above circumstances, and has as its object to provide a rear body structure of a vehicle capable of improving the coupling rigidity between a rear portion of a rocker and a front portion of a rear floor side member.

[0006]

According to the present invention, there is provided a rocker outer panel constituting an outer portion in a vehicle width direction;
A rocker inner panel forming an inner portion in the vehicle width direction, a rocker having a rocker closed cross section extending in the vehicle front-rear direction formed by the rocker inner panel, and a front portion connected to a vehicle width direction inner rear portion of the rocker inner panel; A rear floor side member that forms a closed cross section of the rear floor side member extending substantially in the vehicle front-rear direction with the panel; and a vehicle width direction inner edge provided in the rocker closed cross section and the rocker inner panel and the rear floor side member. A reinforcing member coupled to the coupling portion and having an outer edge in the vehicle width direction coupled to the rocker outer panel.

Therefore, the load input from the rear suspension and transmitted to the rear floor side member during cornering or lane change of the vehicle is transmitted to the rocker inner panel from the joint between the rear floor side member and the rocker inner panel. At the same time, it is also transmitted to the rocker outer panel via the reinforcing member from the joint between the rear floor side member and the rocker inner panel. As a result, the load input from the rear suspension and transmitted to the rear floor side member during cornering, lane change, etc., is efficiently transmitted to the rocker, and can be efficiently returned to the front of the vehicle body through the rocker closed cross section. . Therefore, the operability is improved, and the responsiveness of the steering operation is improved, so that a light vehicle movement can be obtained.

[0008]

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

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

As shown in FIG. 2, in a vehicle body 10 of the present embodiment, a pair of left and right rockers 12 are disposed along the vehicle front-rear direction at both ends in the vehicle width direction below the vehicle compartment (the left side of the vehicle). Lockers are not shown).

As shown in FIG. 1, the rocker 12 is composed of a rocker outer panel 14 constituting an outer portion of the rocker 12 in the vehicle width direction and a rocker inner panel 16 constituting an inner portion of the rocker 12 in the vehicle width direction. I have. The cross-sectional shape of the rocker outer panel 14 as viewed from the rear of the vehicle has a U-shaped cross section with an opening directed inward in the vehicle width direction, and an upper flange 14A and a lower flange 14B are formed at the opening ends. The cross-sectional shape of the rocker inner panel 16 as viewed from the rear of the vehicle is an inverted L-shape in which the upper end portion of the vertical wall portion 16A is bent outward in the vehicle width direction, and the outer edge of the upper wall portion 16B in the vehicle width direction. An upper flange 16C is formed in the portion.

Upper flange 14 of rocker outer panel 14
A is on the upper flange 16C of the rocker inner panel 16,
The lower flange 14B is connected to the lower edge 16D of the vertical wall portion 16A of the rocker inner panel 16 by spot welding, and the rocker 12 has a rocker closed cross-section 18 extending in the vehicle longitudinal direction.

As shown in FIG. 2, the rear part 1 of the rocker 12 is provided.
On the inner side in the vehicle width direction of the 2A and the wheel house inner panel 28, a rear floor side member 30 is disposed substantially along the vehicle front-rear direction.

As shown in FIG. 3, a contact portion 3 of the rear floor side member 30 with the wheel house inner panel 28 is provided.
At 0A, the cross-sectional shape as viewed from the front of the vehicle has a U-shaped cross-section with an opening facing outward in the vehicle width direction, and an upper flange 30B and a lower flange 30C are formed at the opening ends. These flanges 30B and 30C are connected to the wheel house inner panel 28 by spot welding.

As shown in FIG. 2, a front portion 30D of the rear floor side member 30 is connected to a rear portion of the rocker 12 in the vehicle width direction.

As shown in FIG. 1, at the front portion 30D of the rear floor side member 30, the cross-sectional shape as viewed from the rear of the vehicle has a U-shaped cross-section with the opening directed outward in the vehicle width direction. An outer edge portion 30F of the wall portion 30E in the vehicle width direction is provided on the upper wall portion 16B of the rocker inner panel 16 and the lower wall portion 30B.
A lower flange 30H formed downward on the outer edge in the vehicle width direction of G is connected to the lower edge 16D of the vertical wall 16A of the rocker inner panel 16 by spot welding. Therefore, the front portion 30 </ b> D of the rear floor side member 30 and the rocker inner panel 16 form a rear floor side member closed cross section 32 that extends substantially in the vehicle front-rear direction.

As shown in FIG. 3, the front end of the front portion 30J of the inner side wall portion of the rear floor side member 30 in the vehicle width direction is joined to the vertical wall portion 16A of the rocker inner panel 16 by spot welding.

As shown in FIG. 1, the rocker closed cross section 18
A rocker rear reinforcement 34 as a reinforcing member is disposed in the upper part along the vehicle body longitudinal direction. The cross-sectional shape of the rocker reinforcement 34 as viewed from the rear of the vehicle body is such that an inner flange 34B bent toward the vehicle lower side at both ends in the vehicle width direction of the base 34A disposed substantially horizontally.
And an outer flange 34C are formed in a U-shaped cross section. Base 34 of rocker reinforcement 34
The vehicle width direction inner edge portion 34D of A is connected to a joint portion between the vehicle width direction outer edge portion 30F of the upper wall portion 30E of the rear floor side member 30 and the upper wall portion 16B of the rocker inner panel 16. The outer flange 34C of the reinforcement 34 is connected to the vertical wall portion 14 of the rocker outer panel 14.
C and the lower flange 36 </ b> A of the quarter panel 36. The inner flange 34B of the rocker rear reinforcement 34 is connected to the vertical wall 16A of the rocker inner panel 16.

As shown in FIG. 3, at the rear end of the base 34A of the rocker rear reinforcement 34, a flange 34E is formed to extend downward.
4E is connected to a connecting portion between a vertical wall portion 16E formed at a rear end portion of the rocker inner panel 16 and a flange 28A formed at a front end portion of the wheel house inner panel 28.

As shown in FIG. 1, a work hole 40 for welding is formed in the lower wall portion 14D of the rocker outer panel 14, and one of the spot guns 42 is inserted from the work hole 40 into the rocker closed section 18. And the outer edge 3 of the upper wall portion 30E of the rear floor side member 30 in the vehicle width direction.
The outer flange 3 of the rocker rear reinforcement 34 in which the vehicle width direction inner edge 34D of the base 34A is connected to the connection between the upper wall 16B and the upper wall 16B of the rocker inner panel 16.
4C is spot-welded to the joint between the vertical wall portion 14C of the rocker outer panel 14 and the lower flange 36A of the quarter panel 36. Garnish 44
Is assembled after spot welding.

As shown in FIG. 2, a center floor cross member 48 is provided between the front ends of the left and right rear floor side members 30 (the left rear floor side member is not shown).

As shown in FIG. 3, the center floor cross member 48 is
0 and a center floor cross member lower 52, and form a closed cross section 54 extending in the vehicle width direction.
Reference numeral 56 in FIG. 3 indicates a wheel house outer panel, and reference numeral 58 in FIG. 3 indicates a rear tire.

Next, the operation of the present embodiment will be described. In the present embodiment, the load input from the rear suspension and transmitted to the rear floor side member 30 at the time of cornering of the vehicle, at the time of lane change, etc., is transmitted to the joint between the front portion 30D of the rear floor side member 30 and the rocker inner panel 16, That is, the upper wall portion 30 of the rear floor side member 30
E, outer widthwise edge 30F and rocker inner panel 16
Is transmitted to the rocker inner panel 16 from the joint between the upper wall portion 16B and the lower flange 30H of the rear floor side member 30 and the lower edge 16D of the vertical wall portion 16A of the rocker inner panel 16.

In this embodiment, the load input from the rear suspension and transmitted to the rear floor side member 30 at the time of cornering or lane change of the vehicle is transmitted to the upper wall portion 30E of the rear floor side member 30 in the vehicle width direction. From the joint between the outer edge 30F and the upper wall 16B of the rocker inner panel 16, a vertical wall 14C of the rocker outer panel 14 is provided via a rocker reinforcement 34.
Is also transmitted to

As a result, in this embodiment, the load input from the rear suspension and transmitted to the rear floor side member 30 at the time of cornering, lane change, etc. of the vehicle is efficiently transmitted to the rear portion of the rocker 12, and the rocker is closed. The vehicle can be efficiently returned to the front of the vehicle body via the cross-section portion 18. Therefore, the operability is improved, and the responsiveness of the steering operation is improved, so that a light vehicle movement can be obtained.

In the above, the present invention has been described in detail with respect to a specific embodiment. However, the present invention is not limited to such an embodiment, and various other embodiments are within the scope of the present invention. It is clear to a person skilled in the art that is possible. For example, the cross-sectional shape of the rocker 12, the cross-sectional shape of the rear floor side member 30, and the cross-sectional shape of the rocker rear reinforcement 34 are not limited to the cross-sectional shape of the present embodiment, and may be other cross-sectional shapes.

[0027]

According to the first aspect of the present invention, the rocker outer panel forming the vehicle width direction outer portion and the rocker inner panel forming the vehicle width direction inner portion have a rocker closed cross section extending in the vehicle front-rear direction. A formed rocker, a rear floor side member having a front portion coupled to the vehicle width direction inner rear portion of the rocker inner panel and forming a rear floor side member closed cross section extending substantially in the vehicle front-rear direction with the rocker inner panel; and a rocker closed cross section. And a reinforcing member having a vehicle width direction inner edge coupled to a coupling portion between the rocker inner panel and the rear floor side member, and a vehicle width direction outer edge coupled to the rocker outer panel. This has an excellent effect that the joint rigidity between the rear portion of the rear floor member and the front portion of the rear floor side member can be improved. In addition, there is an excellent effect that the operability is improved, the responsiveness of the steering operation is improved, and a light vehicle movement can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line 1-1 in FIG.

FIG. 2 is a plan view showing a rear body structure of the vehicle according to one embodiment of the present invention.

FIG. 3 is an exploded perspective view showing a rear body structure of the vehicle according to the embodiment of the present invention, as viewed from the obliquely front inner side of the vehicle.

FIG. 4 is a schematic sectional view showing a rear body structure of a vehicle according to a conventional embodiment.

[Explanation of symbols]

 12 Rocker 14 Rocker Outer Panel 16 Rocker Inner Panel 18 Locker Closed Cross Section 30 Rear Floor Side Member 34 Rocker Rear Reinforcement (Reinforcing Member)

Claims (1)

[Claims] A rocker having a rocker closed cross-section extending in the vehicle front-rear direction formed by a rocker outer panel forming an outer portion in a vehicle width direction and a rocker inner panel forming an inner portion in a vehicle width direction; A rear floor side member coupled to the inside of the vehicle width direction rear portion of the rocker inner panel and forming a rear floor side member closed cross-section extending substantially in the vehicle front-rear direction with the rocker inner panel; A vehicle comprising: a reinforcing member having a width direction inner edge coupled to a coupling portion between the rocker inner panel and the rear floor side member, and a vehicle width direction outer edge coupled to the rocker outer panel. Rear body structure.