JPH0123893Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a rear body structure of an automobile, and more particularly to a rear body structure in the vicinity of a cross member joint of a rear side frame.

(Prior art) A rear side frame disposed along a rear wheel house at the rear of an automobile body has a structure in which, as disclosed in Utility Model Publication No. 52-20812, the front end of the rear wheel house is connected to the outside of the rear side frame. The surface of the rear side frame was extremely bent and shaped to match the shape of the rear wheel house, making the shape and processing of the rear side frame complicated and resulting in poor material yield.

In addition, in the area where the cross member to which the suspension is attached is joined to the rear side frame, reinforcements are conventionally provided within the rear side frame to ensure the strength and rigidity of the rear side frame against the input load from the suspension. , various reinforcement methods have been adopted.

(Purpose of the invention) The present invention is a rear side frame that is disposed along the rear wheel house at the rear of the vehicle body and has a curved part, in which the suspension support part and the cross member are arranged at the front end of the rear wheel house and above the rear side frame. This invention has been made to solve the above-mentioned problems in a vehicle rear structure that is attached to a curved portion. The purpose of this is to improve the strength and rigidity of the rear side frame, improve workability, and improve workability by adding a reinforcing member to the area where the cross member of the rear side frame is attached and creating knots in the cross section of the rear side frame. The goal is to improve material yield.

(Structure of the invention) In order to achieve the above object, the present invention has a curved part that continues from the side sill of the vehicle body toward the rear, curves inward in the vehicle width direction and upward in the vehicle vertical direction, and extends rearward along the rear wheel house. In the rear side frame, the suspension support part and the cross member are attached to the curved part, and the rear side frame has a horizontal hat-shaped cross section with an opening facing outward in the width direction of the vehicle body, and the opening is closed by a closing plate. The closing plate extends rearward to the joint between the rear side frame and the cross member, and in the vicinity of the joint there is a reinforcing member in the shape of a horizontal hat cross section with an opening facing outward in the width direction of the vehicle body. It is characterized by being joined to the rear side frame.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 shows the rear part of an automobile body according to an embodiment of the present invention. As shown in enlarged detail in FIG. 2, the floor panel 1 includes a front floor panel (not shown).
and the rear floor panel 2 are integrally combined,
The rear floor panel 2 includes a front horizontal section 3, a rear horizontal section 4 that is one step higher than the front horizontal section 3, and both horizontal sections 3,
4 and a pickup section 5 that connects the two. A rear side frame 6 extending in the longitudinal direction of the vehicle body is joined to both left and right sides of the floor panel 1, and a rear wheel house 7 extends upwardly to the rear side frame 6 as shown by the imaginary line in FIG. The rear side frame 6 extends along the rear wheel house 7 and has a curved portion 20 that curves rearward inward in the vehicle width direction and upward in the vehicle vertical direction.

FIG. 2 is a perspective view showing the rear structure of the vehicle body, with the pickup section 5 and its front part shown in FIG. FIG. 2 is a sectional view taken along arrow A-A of FIG. The rear structure of the vehicle body is symmetrical on the left and right sides of the vehicle body, so only the left side of the vehicle is shown in FIGS. 2 and 3.

A rear side frame 6 connected to both left and right sides of the rear floor panel 2 includes a frame member 8 with a horizontal hat-shaped cross section that opens outward in the vehicle width direction, and an opening partially attached to the frame member 8 that opens outward in the vehicle body width direction. It is comprised of a reinforcing member 9 with a cross-sectional sideways hat-shaped cross section facing outward in the width direction, and two divided closing plates 10a and 10b that close the side openings of the frame member 8 or the reinforcing member 9.

Further, a cross member 11 extending in the width direction of the vehicle body is joined to a portion of the frame member 8 where the reinforcing member 9 is attached, and the cross member 11 has a hat-shaped cross section with an opening facing downward. The rear floor panel 2 constitutes a closed cross section, and flanges 12a, 12b, 12c formed at the ends thereof are joined to the upper surface and side wall surface of the frame member 8 of the rear side frame 6, respectively.

Furthermore, the frame member 8 of the rear side frame 6
The flange 12a of the cross member 11 is mounted on the vertical wall of the
A cylindrical recess 13 is provided between the frame member 8 and the rear floor so as to cover the recess 13 extending over the entire height (vertical) direction. It is joined to panel 2. As shown in FIG. 3, a cylindrical spacer 16 for holding a suspension mounting bolt 15 is attached to the inside of the suspension bracket 14, and the suspension bracket 14 is attached to the frame member 8 of the rear side frame 6 and the rear side. When joined to the floor panel 2, the spacer 16 is adapted to fit into a cylindrical recess 13 of the frame member 8, thereby forming a suspension support portion.

Figure 4 shows the structure of Figure 2 in order to clarify the structure of Figure 2.
FIG. 2 is a perspective view showing a frame member 8, a reinforcing member 9, and closing plates 10a and 10b taken out from the structure shown in the figure. However, the closing plates 10a and 10b are shown in a removed state. The frame member 8 extends linearly from the front of the part where the reinforcing member 9 is attached to the front of the vehicle body along the side sill (not shown), but the reinforcing member 9 at the front end of the rear wheel house 7 is attached. In the vicinity of the curved portion 20, the left and right frame members 8 of the vehicle body are formed in accordance with the shape of the wheel house 7 so that the distance between them becomes narrower toward the rear of the vehicle body. Further, the reinforcing member 9 has flanges 9a, 9b formed at its opening, which extend straight from the front of the vehicle body, and the straight portions of the flanges 8a, 8b of the frame member 8, which has flanges 8a, 8b formed at its opening,
It is shaped to extend toward the rear of the vehicle. and two closing plates 10a,
10b, the closing plate 10a connects the flange 8 of the frame member 8 from the front to the rear of the vehicle body.
a, 8b to cover the side opening of the frame member, and from the part to which the reinforcing member 9 is attached, it is joined to the side opening flanges 9a, 9b of the reinforcing member 9, and the side opening of the flange 9a, 9b is Rear end portion 17a, 1
It ends with a protruding surface 18 protruding from 7b. Further, the closing plate 10b covers the side opening of the frame member 8 from the rear end of the frame member 8 toward the front of the vehicle body, and covers the side opening of the reinforcing member 9 from the part where the reinforcing member 9 is attached. It has been joined to the protruding surface 18 of the closing plate 10a.

That is, in the cross section near the joint where the reinforcing member 9 of the frame member 8 is attached and the frame member 8 and the cross member 11 are joined, as can be seen from FIG. The reinforcing member 9 forms a closed cross section with the closing plate 10a or 10b.
The suspension bracket 14, which is joined to the frame member 8 and the rear floor panel 2, is supported by this closed cross section.

(Effects of the invention) As described above, according to the invention, a reinforcing member is attached in the longitudinal direction of the vehicle body near the joint between the frame member of the rear side frame and the cross member, and the closed cross section of the rear side frame is divided into two. It is divided to form nodes. Therefore, the input load applied to the rear side frame from the cross member supporting the suspension is received by the nodes formed by the frame members and reinforcing members of the rear side frame, increasing the strength and rigidity of the rear side frame against the input load. Therefore, deformation of the rear side frame can be prevented.

In addition, since the joint of the cross member to the frame member of the rear side frame is divided into two parts using a reinforcing member and molded, the frame member is molded into a special shape near the joint to match the shape of the rear wheel house. By devising the shape of the reinforcing member, it is possible to form a rear side frame with a good appearance, and it also has the effect of improving the workability of the frame member and the yield of materials.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a schematic side view of the rear part of the vehicle body, FIG. 2 is an enlarged perspective view of the main part of FIG. 1, and FIG. A sectional view, FIG. 4 is a frame member from the embodiment of FIG. 2,
FIG. 3 is a perspective view showing the structure with the reinforcing member and closing plate taken out. DESCRIPTION OF SYMBOLS 1... Floor panel, 2... Rear floor panel, 6... Rear side frame, 8... Frame member, 9... Reinforcement member, 10a, 10b... Closing plate, 11... Cross member, 15
...Suspension mounting bolt, 20...Curved part.

Claims (1)

[Scope of utility model registration request] It has a curved part that continues from the side sill of the vehicle and curves toward the rear in the vehicle width direction and upward in the vehicle vertical direction, and extends rearward along the rear wheel house, and the suspension support part and the cross member are connected to the curved part. In the rear side frame that is attached to the rear side frame, the rear side frame has a cross section with an opening facing outward in the vehicle width direction, and the opening is closed by a closing plate to form a closed cross section, and the closing plate is connected to the rear side frame and the cross section. A vehicle body rear structure, characterized in that the vehicle body rear structure is joined to the rear side frame through a horizontally oriented hat cross-sectional member that extends rearward to a joint with the member and has an opening facing outward in the vehicle width direction near the joint.