JPH0722372Y2 - Rear body structure of automobile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a rear body structure of an automobile.

[Conventional technology]

In the rear body structure of an automobile, at the joint between the lower end of the rear pillar, the rear end of the side sill, and the tire house, the rear pillar outer and the side sill outer are usually integrally formed, and the tire house outer is integrally formed on the rear pillar inner. The outer edge of the tire house outer is joined to the rear pillar outer, the tire house inner is joined to the rear pillar inner, and the rear pillar inner and the lower front end of the tire house inner are after the side sill inner. It was joined to the upper edge. further,
At the rear end of the side sill inner, the closed cross section of the side sill opens, so close it with another closing member, or
Alternatively, the tire house inner was extended downward and joined to the side sill outer.

On the other hand, in Japanese Laid-Open Patent Publication No. 54-146321, the lower end of the rear pillar inner is extended downward and joined to a reinforcement interposed between the side sill outer and the side sill inner, and the side sill inner and the reinforcement. There is disclosed a structure in which the rear end opening of the space between the tire and the tire is closed at the lower end of the tire house inner.

[Problems to be solved by the device]

However, as described above, in the structure in which the tire house inner is extended downward to close the rear end opening of the closed cross section of the side sill, the yield of the material forming the tire house inner is deteriorated due to this extension. There was a problem. Also, in the case of a structure closed with another closing member,
There has been a problem that the number of parts is increased, a lot of labor is required for the joining work, and the cost is increased.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, a rear body structure of an automobile according to the present invention includes a rear pillar inner formed integrally with a tire house outer and a lower end of a rear pillar having a closed cross section formed by the rear pillar outer and a side sill outer. At the joint with the rear end of the side sill that forms a closed cross section with the side sill inner, the rear end of the side sill inner has a shape that changes from the bulging shape inward in the vehicle width direction to the flat shape. The outer end in the vehicle width direction is joined to the joining edge formed at the rear end of the side sill outer so as to close the rear end opening that is formed and is surrounded by the side sill inner and the side sill outer. An inward end of the rear sill inner is joined to a flat plate-like portion of the side sill inner, and a downward extension is provided on the lower end side of the rear pillar inner. It is characterized by a door.

[Action]

According to the above configuration, since the rear end of the side sill inner is formed in a shape that changes from the bulging shape inward in the vehicle width direction in the front thereof to the flat shape, the rear end opening of the side sill is It is formed by the outer and the flat part of the side sill inner. On the other hand, the extension provided at the lower end of the rear pillar inner has the outer end in the vehicle width direction joined to the joining edge formed at the rear end of the side sill outer, and the inner end in the vehicle width direction at the side sill inner. Since it is joined to the flat plate-shaped portion in, the rear end opening can be closed. As a result, it is possible to improve the yield of the forming material because it is not necessary to partially extend the tire house inner downward, or it is possible to reduce the number of parts by eliminating the need for a closing member, improving productivity and reducing costs. Can be achieved.

In addition, since the rear end of the side sill inner is formed in a shape that changes from a bulge inward in the vehicle width direction in front of the side sill inner to a flat plate shape, the extension of the rear pillar inner closes the cross section of the side sill outer. Therefore, the length of the extension portion in the vehicle body width direction can be shortened by the bulging shape. Therefore, when the tire house outer and the rear pillar inner are integrally formed by, for example, draw forming, the depth of the draw forming can be reduced. As a result, it is possible to prevent the occurrence of product defects due to an increase in the drawing depth.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 5 shows a rear vehicle body structure of a four-door vehicle. An opening 2 for a rear side door is formed in a rear portion of a side surface of a vehicle body 1, and a rear end of the opening 2 is constituted by a rear pillar 3. . The front edge of the opening 2 is a center pillar 4, the upper edge is a roof side rail 5, and the lower edge is a side sill 6. The lower end of the rear pillar 3 and the rear end of the side sill 6 are respectively formed. They are connected to each other and to the rear fender portion 7, respectively.

1 to 4, the rear pillar 3 is formed in a closed cross section by a rear pillar outer 8 and a rear pillar inner 9. The lower portion of the rear pillar outer 8 is integrally joined or integrally formed with a rear fender panel (not shown) forming the outer surface of the rear fender portion 7. The lower end of the rear pillar inner 9 is integrally molded with the tire house outer (not shown),
The lower end of the rear fender panel and the outer end of the outer tire house are joined together.

A tire house inner 10 having a suspension tower portion that supports an upper portion of a strut of a rear suspension member is joined to an inner side surface of a lower portion of the rear pillar inner 9 in the vehicle width direction so as to face the inner side of the tire house outer. A joint edge 10a protruding to the outer periphery is formed on the outer peripheral edge of the tire house inner 10, and is joined to the lower end portion of the rear pillar inner 9. Further, at the front end portion of the tire house inner 10, the joint edge 10a is formed wide toward the front, and at the front end edge thereof, the joint formed on the front edge portions of the rear pillar inner 9 and the rear pillar outer 8 is joined. The edges 9a and 8a are joined. Further, the joint edges 8b, 9b formed by bending the rear pillar outer 8 and the rear pillar inner 9 from the rear edge projecting outward in the vehicle width direction to the inside are joined to each other.

The side sill 6 is formed into a closed cross section by the side sill outer 11 and the side sill inner 12. The side sill outer 11 is integrally joined to or integrally molded with the rear pillar outer 8. Side sill inner 12
The rear end portion has a joining plate portion 13 formed of a flat vertical wall without bulging inward in the vehicle width direction, and the upper edge 13a of the rear portion is the lower end of the joining edge 10a of the tire house inner 10. The rear end edge 13b and the rear lower edge 13c are joint edges with the rear side frame 14. In addition, the joining edges 11a and 1a formed on the upper edge and the lower edge of the side sill outer 11
1b is joined to the joining edges 12a and 12b formed on the upper edge and the lower edge of the side sill inner 12, respectively.

The lower end of the rear pillar inner 9 extends below the lower end of the tire house inner 10 and closes the rear end opening surrounded by the joint plate 13 and the side sill outer 11, as shown in FIG. The extension portion 15 is formed as described above, and the joining edge 15 that is continuous with the joining edge 9a is formed at the inner edge in the vehicle width direction.
a is formed and is joined to the joining plate portion 13 of the vertical wall formed at the rear end of the side sill inner 12. A joint edge 15b continuous with the joint edge 9b is formed at an outer edge of the extension portion 15 in the vehicle width direction, and a joint edge of the rear pillar outer 8 is joined to a rear edge of the side sill outer 11. It is joined to the joining edge 11c formed continuously with 8b.

Joining edge 14a formed on the front edge of the rear side frame 14
Is joined to the vertical wall surface of the side sill inner 12, and the joining edge 14b formed at the lower edge of the front end portion is joined to the lower ends of the side sill inner 12 and the joining plate portion 13 at the rear end portion.

Further, the rear side frame 14 has a hat-shaped cross section from the front end portion, which is a joint portion with the side sill 6, to the rear side. The joining edge 14c formed at the front end of the vertical wall surface of the hat-shaped cross section on the outer side in the vehicle width direction is joined to the rear end of the joining plate portion 13. Further, the joining edge 14d formed by rising from the outer flange of the front end portion of the hat-shaped cross section is joined to the lower end edge of the tire house inner 10.

As described above, the lower end portion of the rear pillar inner 9 is extended below the lower end portion of the tire house inner 10 to extend the joining plate portion.
An extension portion 15 is formed so as to close a rear end opening surrounded by 13 and the side sill outer 11, and a joint edge 15a formed on an inner end edge of the extension portion 15 is formed in a flat plate shape at a rear end portion of the side sill inner 12. By joining to a certain joining plate portion 13, by joining the joining edge 15b formed on the outer edge of the extension portion 15 to the joining edge 11c formed on the rear edge of the side sill outer 11,
The opening formed at the rear end of the closed cross section of the side sill 6 can be closed by this extension 15.

Therefore, it is not necessary to extend a part of the tire house inner 10 downward or to separately provide a closing member in order to close the opening at the rear end of the side sill 6. As a result, the yield of the members forming the tire house inner 10 can be improved, or the number of parts can be reduced, the productivity can be improved, and the cost can be reduced.

In addition, it is easy to form the extension portion 15 below the rear pillar inner 9, and it can be implemented at low cost.

Further, since the rear end portion of the side sill inner 12 is formed in a shape that changes from a bulging shape inward in the vehicle width direction in front of the side sill inner 12 to a flat shape, the extension portion 15 of the rear pillar inner 9 is formed.
Since it is only necessary to close the cross section of the side sill outer 11, the length of the extension 15 in the vehicle body width direction can be shortened by the bulging shape. Therefore, when the tire house outer and the rear pillar inner 9 are integrally formed by, for example, drawing, the depth of drawing can be reduced. As a result, it is possible to prevent the occurrence of product defects due to an increase in the drawing depth.

[Effect of device]

The rear body structure of the vehicle according to the present invention is as described above.
The rear end of the side sill inner is formed in a shape that changes from a bulge inward in the width direction of the vehicle body in front of the side sill inner to a flat plate shape, and closes the rear end opening surrounded by the side sill inner and the side sill outer. The outer end in the vehicle width direction is joined to the joining edge formed at the rear end of the side sill outer, and the inner end in the vehicle width direction is joined to the flat portion of the side sill inner. Part
It is a structure provided on the lower end side of the rear pillar inner.

Therefore, the rear end opening of the side sill formed by the flat plate-shaped portion of the side sill inner and the side sill outer can be closed by the extension of the rear pillar inner. As a result, it is possible to improve the yield of the forming material because it is not necessary to partially extend the tire house inner downward, or it is possible to reduce the number of parts by eliminating the need for a closing member, improving productivity and reducing costs. Can be achieved.

Further, since the rear end portion of the side sill inner is formed in a flat plate shape, when the tire house outer and the rear pillar inner are integrally formed by, for example, draw forming, the depth dimension of the draw forming can be reduced. As a result, it is possible to prevent the occurrence of product defects due to an increase in the drawing depth.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a perspective view of a joining state of a lower end portion of a rear pillar, a rear end portion of a side sill, and a front end portion of a tire house inner as viewed from a vehicle interior side. FIG. 2 is an exploded perspective view of the same. FIG. 3 is a sectional view taken along the line III-III in FIG. FIG. 4 is a sectional view taken along the line IV-IV in FIG. FIG. 5 is a perspective view showing the overall structure of the rear vehicle body. 3 is a rear pillar, 6 is a side sill, 8 is a rear pillar outer, 9 is a rear pillar inner, 11 is a side sill outer, 12
Is a side sill inner, 13 is a joining plate portion, and 15 is an extension portion.

Claims (1)

[Scope of utility model registration request] 1. A rear pillar inner formed integrally with a tire house outer and a lower end of a rear pillar having a closed cross section formed by the rear pillar outer, and a rear end of a side sill having a closed cross section formed by a side sill outer and a side sill inner. The rear end of the side sill inner is formed in a shape that changes from a bulge inward in the vehicle width direction to a flat plate shape in front of the side sill inner, and is surrounded by the side sill inner and the side sill outer. The outer end in the vehicle width direction is joined to the joining edge formed on the rear end of the side sill outer so as to close the rear end opening, and the inner end in the vehicle width direction is joined to the flat portion of the side sill inner. The downward extension is
A rear body structure of an automobile, which is provided on a lower end side of a rear pillar inner.