JPH0621827Y2 - Rear structure of the car body - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a rear structure of a vehicle body, and more particularly, to a structure configured to increase the rigidity of the vehicle body.

[Prior art]

In a so-called 3-box type automobile, a package tray used as a shelf portion or a speaker mounting portion of an audio device is provided behind the rear seat.
Conventionally, various vehicle body structures have been proposed in which the vehicle body rigidity can be enhanced by effectively utilizing the upper back panel that constitutes the package tray. As a general thing, a lower rear reinforcement panel is joined to the lower surface of the front end of the upper back panel, and the left and right suspension supports for accommodating and supporting the shock absorber by the front end of the upper back panel and the lower rear reinforcement. There is one in which a reinforcing box frame part having a box cross section that crosses between the towers in the vehicle width direction is formed, and both ends of this reinforcing box frame part are respectively connected to the suspension support towers. Kaisho 61-117066
It is also shown in the official gazette. By thus connecting the left and right suspension support towers with the reinforcing box frame, the torsional rigidity of the vehicle body can be improved.

[Problems to be solved by the device]

By the way, the shock absorber is supported by the suspension support tower by fixing the upper end portion to the lower surface of the top wall of the suspension support tower by bolts, etc. The top wall mainly receives the thrust force. However, in the case of the vehicle body structure disclosed in the above publication, as shown in FIG. 5, the end portion of the panel forming the upper surface of the reinforcing box frame portion a has an inner side in the vehicle width direction on the top wall b. The end portions, that is, the portions on the inner side in the vehicle width direction with respect to the axial center position of the shock absorber are joined, and the box cross section of the reinforcing box frame portion is interrupted before the suspension support tower c. Therefore, the push-up force exerted on the top wall b cannot be sufficiently received by the reinforcing box frame portion a, and this is almost received only by the top wall b. Therefore, in the vehicle body structure as disclosed in the above publication, when the thrust force acts on one of the suspension support towers, the tendency of the vehicle body to twist due to the thrust force cannot be sufficiently suppressed, and the reinforcement is reinforced. Even by providing the box frame portion, the rigidity of the vehicle body cannot be sufficiently increased. The present invention was devised under the circumstances described above, and in the rear structure of the vehicle body, which effectively improves the rigidity of the vehicle body by effectively utilizing the upper back panel forming the package tray. , Solving the above conventional problems,
Its purpose is to be able to improve the rigidity further and effectively.

[Means for solving problems]

In order to solve the above problems, the present invention takes the following technical means. That is, the lower rear reinforcement panel is coupled to the lower surface of the front end portion of the upper back panel which is arranged and fixed so as to bridge between the left and right rear pillars above the left and right suspension support towers that house and support the shock absorbers. In the rear structure of the vehicle body, wherein the front end of the back panel and the lower reinforcement panel form a box-shaped reinforcing box frame section that crosses between the left and right suspension support towers in the vehicle width direction. The panels forming the upper surfaces of both end portions of the frame portion are provided with extension portions that extend over the top wall of the suspension support tower above the shock absorber attachment portion and overhang further outward in the vehicle width direction. When the end edge of the extension part is joined to the part of the top wall on the outer side in the vehicle width direction, In both cases, the edges of the panels constituting the parts other than the upper surface at both ends of the reinforcing box frame part are connected to the front and rear side surfaces of each of the suspension support towers or the inner surface in the vehicle width direction so as to be continuous with the joining of the extending parts. They are joined together.

[Action and effect]

The extension part provided at the upper end of the reinforcement box frame part overhangs on the top wall of the suspension support tower so as to extend further outward in the vehicle width direction beyond the shock absorber attachment part, and its edge. Is joined to a portion of the top wall that is outward in the vehicle width direction. Then, the suspension support is configured so that the panels constituting the parts other than the upper surface at both ends of the reinforcing box frame part are continuous with the joining of the extending parts, that is, form the box-shaped cross-section part together with the extending parts. It is joined to the front and rear side surfaces of the tower or the inner side surface in the vehicle width direction. That is, most of the top wall of the suspension support tower is covered by the extension of the reinforcing box frame part and is located in the box cross-section space of the reinforcing box frame part. The thrust force from the shock absorber acting on the wall can be received by the extension portion or the reinforcing box frame portion. In addition, both ends of the reinforcing box frame portion that receives the thrust force are coupled to the left and right suspension support towers, respectively. Therefore, the tendency of the vehicle body to twist when a thrust force acts on one suspension support tower can be sufficiently suppressed by the reinforcing box frame portion, so that the rigidity of the vehicle body can be significantly improved. Further, in the present invention, as described above, the extension portion that covers and is joined to the top wall of the suspension support tower is superposed on the top wall of the suspension support tower, and thus the thrust force from the shock absorber is received. Since the surface rigidity of the top wall itself can be increased, the rigidity of the vehicle body can also be increased by this.

[Explanation of Examples]

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. As shown in FIG. 3, the upper back panel 1 which constitutes a package tray provided at the rear of the rear seat is provided between the left and right rear pillars 6 and 6 above the left and right suspension support towers 2 and 2 which accommodate and support the shock absorber S. It is arranged so that it can be passed over. Then, the side edge portion is attached to the vehicle body by being joined to the inner side surface of the rear pillar 6 via the bracket panel 7. As shown in FIGS. 2 and 3, the lower back surface of the upper back panel 1 at the front end is connected to a substantially angled lower reinforcement panel 3, and the upper back panel 1 is bent in a substantially angled shape. By the front end portion and the lower reinforcement panel 3, a reinforcing box frame portion 4 having a box cross section that crosses between the left and right suspension support towers 2 and 2 in the vehicle width direction is formed. In the case of this example, the lower reinforcement panel 3 is formed by joining three panels, and the intermediate member panel 3a is formed.
And side member panels 3b, 3 joined to both ends thereof
b. An extension tension panel 1a is joined to the front end of the upper back panel 1 at a position corresponding to the side member panel 3b. The extension tension panel 1a is attached to the side member panel 3b as shown in FIG. As shown, they are joined together to form a box cross section. Then, both ends of the reinforcing box frame portion 4 configured as described above, that is, the end portions of each of the above-mentioned extension tension panels 1a, 1a or each side member panel 3b, 3b are respectively attached to the left and right suspension support towers 2, 2. By being combined,
The rigidity of the vehicle body can be improved. Although only one end side of the upper back panel 1 and the reinforcing box frame portion 4 is shown in the drawing, the other end side is also configured as described above. In the present invention, the panels constituting the upper surfaces of both end portions of the reinforcing box frame 4 are overhanged on the top wall 2a of the suspension support tower 2 beyond the shock absorber mounting portion and further outward in the vehicle width direction. Each of the extending portions 5 is provided. In the case of this example, this is formed at the outer end of the above-mentioned tension panel 1a, and as shown in FIG. 1 to FIG. It is continuously joined to a portion on the outer side in the width direction and a portion on the front side in the front-rear direction. Further, in this example, as well shown in FIGS. 2 to 4, the front end edge of the extending portion 5 is wrapped around the front side surface of the suspension support tower 2 to provide a suspension support tower. The top wall 2a and the front side wall 2b are joined to each other and the side surfaces of the front side wall 2b are superposed by welding. Then, as shown in FIGS. 1, 2, and 4,
Panels constituting parts other than the upper surface at both ends of the reinforcing box frame portion 4, that is, in the present example, the end edges of the side member panels 3b, 3b are inner side surfaces of the suspension support towers 2, 2 in the vehicle width direction. Joined to the side surface on the rear side so as to be continuous with the joining of the extending portion 5, in other words, the joining portion for the suspension support towers 2 and 2 should cooperate with the joining portion by the extending portion to be closed annularly. Has been done. In the vehicle body structure of this example configured as described above, most of the top wall 2a of the suspension support tower 2 is
Since it is covered with the extending portion 5 and is located in the box cross-sectional space of the reinforcing box frame portion 4, the thrust force acting on the top wall 2a from the shock absorber S is applied to the extending portion 5 or the reinforcing box frame portion. 4 and the rigidity of the connection of the reinforcing box frame portion 4 to the suspension support towers 2 and 2 especially against bending is dramatically increased. The rigidity of the rear part of the vehicle body, especially the rigidity against torsion, is provided by the gate structure composed of the left and right suspension support towers 2 and 2 and the reinforcing box frame 4 installed while dramatically improving bending rigidity. Therefore, the tendency of the vehicle body to twist when a thrust force is applied to one suspension support tower 2 is sufficiently and effectively suppressed. Also, the top wall 2a of the suspension support tower 2 is
The surface rigidity of itself is increased by the extending portion 5 which is overlapped with and joined to this, which also contributes to increasing the rigidity of the vehicle body. Further, in the case of this example, as described above, since the front end edge of the extending portion 5 is jointed together with the joint portion or the like between the top wall 2a and the side wall 2b of the suspension support tower 2, the suspension support is formed. Tower 2
It is also possible to increase the rigidity against the force in the horizontal direction and the assembling strength. Although not shown, a working hole is provided in an appropriate portion of the extension portion 5, and a bolting work between the top wall 2a of the suspension support tower 2 and the upper end portion of the shock absorber S can be performed through this working hole. Done. Further, this working hole is not provided, and the extending portion 5 is provided with a rib that is brought into contact with the upper surface of the top wall at a position corresponding to the bolt fastening portion.
It may be tightened together with a and the upper end of the shock absorber. In this case, the mounting strength of the shock absorber can be increased and the surface rigidity of the top wall 2a can be further increased. Further, since it is not necessary to adopt a work form in which a tool is inserted from the work hole into the box cross-section space to perform bolting work, the workability of attaching the shock absorber is improved. By the way, the scope of the present invention is not limited to the above-described embodiments. For example, in the above-mentioned embodiment, the lower reinforcement panel is composed of a plurality of panels, but it may be composed of only one panel, and the extending portion may be formed on the upper back panel itself. It doesn't matter. Further, it goes without saying that the shape of the extending portion and the like are not limited to those shown in the above embodiment.

[Brief description of drawings]

1 is a sectional view taken along the line I-I of FIG. 2, FIG. 2 is a perspective view showing a main part of a vehicle body structure according to an embodiment of the present invention, and FIG. FIG. 4 is a perspective view seen from the front, FIG. 4 is a sectional view taken along line IV-IV of FIG. 2, and FIG. 5 is a sectional view showing a conventional vehicle body structure. 1 ... Upper back panel, 2 ... Suspension support tower, 2a ... Top wall, 3 ... Lower reinforcement panel, 4 ... Reinforcing box frame part, 5 ... Extension part, 6 ...
Rear pillar, S ... Shock absorber.

Claims (1)

[Scope of utility model registration request] 1. A lower rear reinforcement panel is connected to a lower surface of a front end portion of an upper back panel which is arranged and fixed so as to bridge between left and right rear pillars above the left and right suspension support towers for accommodating and supporting a shock absorber. In the rear structure of the vehicle body, a reinforcing box frame portion having a box cross section that crosses the left and right suspension support towers in the vehicle width direction is formed by the front end portion of the upper back panel and the lower reinforcement panel. Panels that constitute the upper surfaces of both ends of the reinforcing box frame are provided with extension portions that extend over the top wall of the suspension support tower and extend outward beyond the shock absorber attachment portion toward the vehicle width direction outward. Provided, and the end edges of these extending portions are joined to the portion of the top wall on the outer side in the vehicle width direction. Along with the joining of the extending portion to the front and rear side surfaces of each of the suspension support towers or the vehicle width direction inner side surface, the end edges of the panels constituting the portions other than the upper surface at both ends of the reinforcing box frame portion are connected. The rear structure of the vehicle body, which is characterized by being joined together.