JPS6296177A - Rear car body structure - Google Patents

Abstract

PURPOSE:To improve the rigidity of the rear corner section of a car body and the bumper fitting section by forming an angular wall on a trunk side panel. CONSTITUTION:A trunk side panel 16 is constituted of a nearly horizontal lower-step section A formed lower by one step than the upper face of a rear floor panel 14 at the front side of a car body and a slant section B with a rising gradient integrally formed from the rear end of the lower-step section A to the rear side. A jack is fitted to the lower-step section A via a jack bracket 28.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rear body structure of an automobile, and more particularly to a body structure reinforced with rigidity to resist external forces applied from the rear.

(Prior Art) As is well known, some automobiles are provided with a trunk room in the rear of the automobile for storing spare tires, repair tools, and even luggage.

In a typical vehicle body structure, the trunk space is formed by a rear fender, a rear floor panel, and a trunk side panel that connects these laterally.

An example thereof is disclosed in, for example, Japanese Utility Model Application Publication No. 57-63787. In the structure shown in this publication, a recess is provided in the trunk side panel to accommodate the spare tie A7, but repair tools such as jacks are accommodated in this area, and the spare tire is accommodated in the center of the rear floor panel. There are also products that have a recessed part for this purpose.

By the way, in this type of rear body structure, as partially shown in the above publication, a pair of rear frames with a concave or hat-shaped cross section are fixed to both sides of the lower surface of the rear floor panel and extend to the rear end of the vehicle body. It forms a closed section with the lower surface of the rear floor panel, reinforcing the rear floor panel.

A rear bumper is fixed to this rear frame via a bracket so as to sandwich an end panel fixed to a rear fender.

(Problems to be Solved by the Invention) However, the conventional rear vehicle body structure as described above has the following problems.

In other words, in the conventional structure, the rear bumper is supported by a pair of rear frames, and the end panel is not strong enough in the event of a minor collision from behind. The lower skirt and rear frame were sometimes deformed.

This kind of problem can be solved by adding a new member to reinforce the attachment part, but such a measure is not preferable because it increases the weight of the vehicle body and increases the number of assembly steps.

The present invention has been made in view of these problems, and its purpose is to provide a structure that can increase the rigidity of the rear vehicle body structure without adding any new members.

(Means for Solving the Problems) In order to achieve the above object, the present invention devises the shape of the rear body structure, especially the trunk side panel, and changes the overall shape to the front side of the body. It is lower than the rear floor panel and slopes upward toward the rear.

In addition, one side and rear end of the trunk side panel are connected to the rear fender and the end panel fixed to the rear fender through flanges, respectively, and the other side is formed into an upright shape. Through the vertical wall,
It is joined to the rear frame which is fixed to the underside of the rear floor panel.

Furthermore, a diagonal wall extending from the vertical wall toward the rear end of the one side is provided.

(Function) In the vehicle body structure configured as described above, a vertical wall formed upright, a diagonal wall extending from this toward the rear end of one side, and an end panel are arranged in a triangular shape on the side of the rear frame. Because it is shaped like this, it has great rigidity against external forces applied from behind.

Further, since the trunk side panel only needs to form a diagonal wall, there is no need to add any new members, which is advantageous in terms of cost.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be explained in detail with reference to the accompanying drawings.

1 to 4 show an embodiment of the rear body structure of an automobile according to the present invention.

FIG. 1 is a drawing of one side of the rear end of the vehicle body structure viewed from the front direction. At the rear of the vehicle body, a pair of rear fenders 10 that form the side walls of the trunk room are extended on both sides, and between the rear fenders 10. An end panel 12 having a skirt portion 12a at its lower portion is fixed to form the rear wall of the trunk room.

Inside the trunk, one end is attached to the above end panel 1.
A rear floor panel 14 is fixedly attached to the rear floor panel 2 and has a recess 14a in the center of the groove for storing a spare tire (S, T>).

Between the rear fender 10 and the rear floor panel 14,
Trunk side panels 16 connecting these are provided on both sides.

A rear frame 18 having a hat-shaped cross section that extends to the end panel 12 is fixed to the lower surface of the side edge of the rear floor panel 14 along the rear fender 10.
This and the lower surface of 4 form a closed cross section, reinforcing the rear floor panel 14 from below, and bumper mounting flanges 18a, 18a are formed on both sides at the rear end.

Further, a cross member 20 having a concave cross section is fixed to the lower surface of the rear floor panel 14 so as to be substantially orthogonal to the rear frame 18, and this also reinforces the rear floor panel 14 from below.

Roughly speaking, below the rear floor panel 14, there is the recess 1.
The silencer 22 is arranged so as to avoid the cross member 4a, and is suspended from the cross member 20 by a hanging fitting 26 with a cushioning material 24 interposed therebetween.

On the other hand, as shown in detail in FIG. 4, the trunk side panel 16 has a substantially horizontal lower section A that is lower than the upper surface of the rear floor panel 14 on the front side of the vehicle body, and a lower section A that is lower than the upper surface of the rear floor panel 14 on the front side of the vehicle body. It generally consists of a sloped part B with an upward slope integrally formed from the rear end of part A toward the rear side, and a jack 30 is attached to the lower part A via a jack bracket 28. ing.

One side of the trunk side panel 16 has a vertical 7 flange 16a hanging down from the side edge of the lower section A, and an inclined section B.
An arcuate flange 16b is provided on the side edge of the rear fender 10 and is curved along the inclination thereof, and is joined to a flange provided at the lower end of the rear fender 10 in correspondence with the flange 16b by spot welding or the like.

An upright flange 16C is provided at the rear end of the inclined portion B, and the upright flange 16C is connected to the end panel 1.
It is joined to the inner surface of 2 by spot welding or the like.

Further, on the other side of the trunk side panel 16, a vertical wall 16 (l) whose upper end is horizontal is provided, and a vertical wall 16d
The upper edge of the rear frame 18 is joined to one side of the rear frame 18.

Approximately two-thirds of the rear side of the vertical wall 16d is cut out into a rectangular shape, and from the short side 16e of this cutout portion toward the rear end of the side where the arcuate flange 16b of the trunk side panel 16 is formed. , a diagonal wall 16 [curved in an arc shape] is formed.

The diagonal wall 16" is inclined toward the rear side and has a shape that widens from the vertical wall 16d toward the arcuate flange 16b, and has a substantially horizontal, substantially triangular flat surface 16g on its upper edge.
are connected.

As shown in FIG. 2, at the rear end of the vehicle body, bolts and nuts 36 are installed so that the end panel 12 is sandwiched between the bumper mounting flange 18a of the rear frame 18 and the bumper bracket 34 fixed to the bumper 32. The bumper 32 is fixed by screwing on the bumper 32.

Note that the members indicated by the reference numeral 38 in FIGS. 1 and 3 are as follows:
This is a tie-down hook installed between the rear frame 18 and the lower surface of the trunk side panel 16. Further, the X-marked portions shown in FIGS. 2 and 3 indicate the joining positions when welding and joining the flange portions and the like.

In the vehicle body structure configured as described above, when an external force is applied to the bumper 32 at the rear of the vehicle body, the vertical walls 16 of the trunk side panel 16 are
d, the diagonal wall 16f, and the end panel 12 form a triangular shape at the rear corner of the vehicle body to resist external forces.
The rigidity of the vehicle body corner and the bumper 32 mounting portion is significantly improved.

Therefore, unlike the conventional vehicle body structure, the skirt portion 12a and the rear frame 18 are extremely difficult to deform due to a light impact from behind.

Further, the trunk side panel 16 whose rigidity can be increased in this manner is advantageous in terms of cost because it is only necessary to form the shape as described above.

In the above embodiment, the diagonal wall 16f of the trunk side panel 16 is inclined toward the rear side, but the present invention is not limited thereto, and may be in an upright state, for example.

Further, in the above embodiment, since the silencer 22 is supported and fixed to the highly rigid cross member 20 by the hanging fitting 26, the level of imaging such as muffled sounds is reduced.

Furthermore, since the jack bracket 28 provided on the trunk side panel 16 is integrally joined to the tie-down hook 38, the mounting strength of the bracket 28 is also increased.

(Effects of the Invention) As described above in detail in the embodiments, according to the rear body structure of an automobile according to the present invention, by forming a diagonal wall on the trunk side panel, the rear corner of the vehicle body and the bumper Significantly increases the rigidity of the mounting part and provides effective reinforcement.

In addition, reinforcement is achieved by simply changing the shape of the J-rank side panel without adding any new reinforcing material, and there is almost no increase in weight.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the rear vehicle body structure according to the present invention as seen from the front side, FIG. 2 is a sectional view taken along line 8 in FIG. 1, and FIG. 8 is a sectional view, and FIG. 4 is a perspective view of the trunk side panel. 10... Rear fender 12... End panel 14... Rear floor panel 16... Trunk side panel 18...
・Rear frame 20...Cross member 22
... Silencer 24 ... Cushioning material 2
6... Hanging bracket 28... Jacket bracket 30... Jacket 32... Bumper 34... Bumper bracket 36...・Boltnut Figure 2, 2

Claims (1)

[Claims] In a vehicle body structure that is located at the rear of an automobile and includes a rear fender, a rear floor panel, and a trunk side panel that connects these, the trunk side panel is formed so that the front side of the vehicle body is lower than the rear floor panel, One side and rear edge of the trunk side panel are respectively joined to the rear fender and an end panel fixed thereto to form a rear wall of the trunk room, and the other side is formed to stand up. An oblique line that is connected to the rear frame fixed to the lower surface of the rear floor panel through a vertical wall, extends from the rear of the vertical wall of the trunk side panel toward the rear end of one side, and rises upward. A rear body structure of an automobile characterized by forming a wall.