JPH0444466Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to the front structure of an automobile body.

(Prior art) At the front of an automobile body, the lower part of the darts lower panel that partitions the cabin and engine room is extended to the rear of the vehicle body, and its rear end is connected to the front end of the floor panel, and Generally, a structure is adopted in which a tire house is provided following the front end of a side sill extending in the front-rear direction, and in front of the side sill, the rear portion thereof bulges into the cabin.

In this case, the area from the side sill to the tire house corresponds to the corner of the front of the vehicle body, and loads from the front, rear, left, and right sides of the vehicle tend to concentrate.
As described in Japanese Patent No. 29480, a reinforcing member is separately provided in this portion to improve the rigidity and strength. Then, the rear end of the darts lower panel is extended toward the cabin side so as to sufficiently overlap with the side sill and connected to the floor panel, and the connection between the darts lower panel and the floor panel is where the load is concentrated. It is designed so that it does not intersect with the side sill in the vicinity of easy corners.

Furthermore, in Japanese Patent Application Laid-Open No. 58-67569, a frame member is provided that extends in the longitudinal direction of the vehicle body along the inside of the side sill under the floor panel, and this frame member connects the front frame in the engine room and the rear frame in the rear of the vehicle body. A combination of these is described. At the front of the vehicle body, the frame member curves from the front end of the side sill along the tire house to reach the front frame. A bead that bulges toward the cabin is provided at the rear end of the dart lower panel, and this bead, the frame member, and the side sill form a closed cross-section extending in the longitudinal direction of the vehicle body.

(Problem to be solved by the invention) However, in the former of the above-mentioned conventional techniques, it is necessary to extend the lower part of the darts lower panel from the rising part that partitions the cabin and the engine room to the cabin side, that is, to the rear. Therefore, it becomes difficult to obtain the dart lower panel by pressing from a flat plate.

On the other hand, in the latter of the above conventional techniques,
Since a closed section is formed at the front end of the side sill by the frame member, the side sill, and the dart lower panel, the rigidity of the front end of the side sill is increased. However, in order to form the closed section, it is necessary to form a bead at the rear end of the dart lower panel, so as in the case of the prior art described above, the diameter is formed by press working from a flat plate. Difficult to obtain Tsushiroa panel.

In other words, the problem with the present invention is that even if the amount of overlap between the darts lower panel and the side sills is reduced, that is, without extending the lower part of the darts lower panel significantly toward the rear of the vehicle body, the connecting part between the darts lower panel and the floor panel can be connected to the side sill. Even if it is provided at a position corresponding to the front end, the dart lower panel itself is not used as a means for securing the rigidity, and the rigidity of the intersection of the dart lower panel, the floor panel, and the side sill is sufficiently secured. To make a lower panel into a shape that does not reduce its workability.

(Means for Solving the Problems) In order to solve these problems, the present invention connects side sills and frames, which extend parallel to each other at intervals, by a reinforcement curved along the tire house. It aims at transmitting load between the frame and the side sills and prevents stress from concentrating on the front end portion of the side sills of the vehicle body. Furthermore, in the corner part formed between the inner surface of the front end of the side sill and the floor in the cabin,
By forming a closed section extending in the longitudinal direction of the vehicle body without using a dart lower panel, the strength of the corner portion is improved. This results in
To ensure sufficient rigidity at the intersection of the above-mentioned dart lower panel, floor panel, and side sill, and to form the dart lower panel into a shape that does not reduce its workability.

In other words, a specific means for solving the above problem is to use a darts lower panel that partitions the cabin and the engine room, has a lower part extending to the rear of the vehicle body, and a rear end connected to the front end of the floor panel, and a lower panel on the side of the floor panel. a frame that extends along the floor panel at a position spaced inward from the side sill whose edge extends in the longitudinal direction substantially parallel to the side sill, and whose front portion extends into the engine room; a tire house provided in front of the wheel house, the rear end of which bulges into the cabin; a tire house that is curved along an inner surface of the tire house that bulges into the cabin, and a front end of which is connected to the frame;
The rear end of the reinforcement is connected to the inner surface of the side sill, and the middle part is connected to the rear inner surface of the tire house. A bead is formed that extends and bulges toward the cabin, and the bead, the inner surface of the front end of the side sill, and the bead are formed at a corner of the cabin between the inner surface of the front end of the side sill and the floor. and a reinforcing member formed separately from the above-mentioned needle lower panel to close the open cross-section formed by both the needle lower panel and the side sill, and a closed cross-section portion extending in the longitudinal direction of the vehicle body; The rear part of the rear part extends in the longitudinal direction of the vehicle body at a position farther inward than the side sill and is joined to the surface of the closed cross section, and the rear end of the dart lower panel and the front end of the floor panel refers to an automobile body front structure characterized in that a connecting end is formed at a position corresponding to the closed cross section.

(Function) In the above vehicle body structure, load can be transmitted between the side sill and the frame via the reinforcement, thereby preventing concentration of stress on the front end portion of the side sill of the vehicle body. Furthermore, since a closed section extending in the longitudinal direction of the vehicle body is provided at the corner between the inner surface of the front end of the side sill of the cabin and the floor, the strength of the front end portion of the side sill of the vehicle body, particularly the corner portion, is increased. improves.

The closed section closes the open section formed by the bead formed at the rear end of the reinforcement, the inner surface of the front end of the side sill, and both the bead and the side sill. and a reinforcing member formed separately from the dart lower panel.

Therefore, even if the lower part of the darts lower panel is not extended far to the rear of the vehicle and the connection part between the darts lower panel and the floor panel is located at a position corresponding to the front end of the side sill, it is possible to create a beat at the rear end of the darts lower panel. The rigidity of the intersection of the dart lower panel, the floor panel, and the side sill can be sufficiently ensured without the need for such an arrangement. In this way, the lower part of the darts lower panel does not need to extend significantly toward the rear of the vehicle, and
Since there is no need to provide a bead on this dart lower panel, it is easy to form it by press working from a flat plate.

(Effect of the invention) Therefore, according to the invention, the frame extending in the longitudinal direction of the vehicle body and the side sill are connected at a position spaced inward from the side sill by a reinforcement curved along the tire house, and Separately from the corner between the inner surface of the front end of the side sill and the floor of the cabin, a bead formed at the rear end of the reinforcement, the inner surface of the front end of the side sill, and the dart lower panel. A closed section extending in the longitudinal direction of the vehicle body is provided by the formed reinforcing member,
A rear side end of the darts lower panel extends in the longitudinal direction of the vehicle body at a position spaced further inward from the side sill and is joined to the surface of the closed section, and the rear end of the darts lower panel and the floor panel are connected to each other. Since the front end of the frame is connected to the front end of the frame at a position corresponding to the closed cross section, the load is transmitted between the frame and the side sill to prevent stress concentration on the front end of the side sill of the vehicle body. moreover,
It is possible to improve the strength of the front end portion of the side sill, thereby ensuring sufficient rigidity at the intersection of the dart lower panel, the floor panel, and the side sill. It is possible to form a shape that does not cause a decrease in the material, and it is also possible to improve the machinability of the material.

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

In the front part of the automobile body shown in FIG. 1, reference numeral 1 denotes a dart lower panel that partitions an engine room 2 and a cabin 3. As shown in FIG.

On the side of the engine room 2, a front frame 4 having a groove-shaped cross section joined to the inner panel of the front fender extends in the longitudinal direction of the vehicle body with the opening of the groove facing outward. The front frame 4 forms a closed cross-section structure extending in the longitudinal direction of the vehicle body together with the inner panel of the front fender.

On the side of the cabin 3, a floor frame 6 with a groove-shaped cross section is provided in the longitudinal direction of the vehicle body. This floor frame 6 is joined to the lower surface of the floor panel 5 with the opening of the groove facing upward.
Together, they form a closed cross-section structure extending in the longitudinal direction of the vehicle body.

Further, at the side portion of the vehicle body, a side sill 7 is joined to the side edge of the floor panel 5 and extends in the longitudinal direction of the vehicle body. The side sill 7 has a closed cross-sectional structure extending in the longitudinal direction of the vehicle body by joining an inner member 7a and an outer member 7b.

Continuing from and in front of the front end of the side sill 7, a tire house 8 with a bulged rear portion is provided in the cabin 3. In addition, the above side sill 7
From the front end of the front pillar 9 supporting the door
is being launched. The dart lower panel 1 and the floor panel 5 are joined to each other at a position corresponding to the front end of the side sill 7, with their ends stacked vertically.

Next, the connection relationship between the front frame 4, flare frame 6, and side sill 7 will be explained.

As shown in FIG. 2 (plan view), the left and right front frames 4 and the left and right floor frames 6 are connected by left and right joint members 11, 11, respectively. The joint member 11 constitutes a frame that extends in the front-rear direction substantially parallel to the side sill 7 at a position spaced further inward from the side sill 7.

That is, the joint member 11 is
As shown in the figure, it has a groove-shaped cross section and is arranged in the longitudinal direction of the vehicle body with the opening of the groove facing upward. and,
The front frame 4 has a rear end fitted into the front end of the joint member 11 from below,
It is joined to the joint member 11 at this fitting portion. On the other hand, the floor frame 6 has its front end fitted into the rear end of the joint member 11 from above, and is joined to the joint member 11 at this fitting part.

Further, on the engine compartment 2 side surface of the dart lower panel 1, there is a groove formed separately from the dart lower panel 1, which intersects the left and right joint members 11, 11 between the front ends of the left and right side sills 7, 7. A dart lower cross member 12 that extends continuously in the left-right direction of the vehicle body is joined to the lower cross member 12.

Then, as shown in FIG. 2, the front ends of the left and right side sills 7, 7 are connected to a reinforcement 10, which is disposed laterally in the left-right direction of the vehicle at the location where the dart lower cross member 12 is disposed. are connected via the left and right joint members 11, 11. That is, the reinforcement 10 is provided inside a closed cross-section structure formed by the dart lower panel 1 and the dart lower cross member 12, as shown in FIG. 3 (front view).
As shown in the left and right joint members 11,1
1, and left and right side members 14, 14, which are on both sides of the center member 13 and have both ends joined to the front end of the side sill 7 and the joint member 11. It is structured as follows.

The tire house 8 has an upper portion formed by the side portion of the lower dart panel 1, and a lower portion formed by the lower cross member 12. The side member 14 of the reinforcement 10 is curved from the inner surface of the front end of the side sill 7 along the inner surface of the tire house 8 constituted by the dart lower cross member 12, and is curved on both inner surfaces. Welded.

That is, as shown in FIGS. 4 to 6, the side member 14 includes a longitudinal section 15 extending in the longitudinal direction of the vehicle body along the side sill 7, and a diagonal section 16 extending diagonally along the tire house 8. Consisting of The front-back direction part 15 has a bottom wall 15a and a side wall 15b.
The diagonal section 16 is formed with an L-shaped cross section, and the diagonal section 16 includes an inclined wall 16a that slopes downwardly toward the front.
It is connected to 5b. On the other hand, the tire house 8
The lower cross member 12 constituting the lower cross member 12 has a bottom wall 12a extending forward along the side sill 7. In the side member 14, the flange 15c of the bottom wall 15a of the longitudinal section 15 and the lower flange 16b of the inclined wall 16a of the oblique section 16 are joined to the bottom wall 12a of the lower cross member 12, and The side wall 15b of the longitudinal section 15 is joined to the inner surface of the side sill 7, and the upper flange 16c of the diagonal section 16 is joined to the inner surface of the tire house 8.

The inclined wall 16a of the diagonal portion 16 of the side member 14 constituting the reinforcement 10 is a closed cross-section structure that extends diagonally along the tire house 8 together with the lower cross member 12. It consists of On the other hand, a bead 15d is formed on the bottom wall 15a of the front-rear portion 15 of the side member 14. The bead 15d extends in the front-rear direction of the vehicle body and bulges into the cabin 3 (upwards). By means of this bead 15d, the inner surface of the side sill 7, and the bottom wall 12a of the dart lower cross member 12, the corner formed between the floor of the cabin 3 and the inner surface of the front end portion of the inner member 7a of the side sill 7 is formed in the front and rear of the vehicle body. A closed cross section (see FIG. 6) extending in the direction is formed.

That is, the bead 15d is attached to the side sill 7.
Together with the inner surface of the lower cross member 12, it forms an open cross section that extends in the longitudinal direction of the vehicle body and is open at the bottom. The closed cross-section portion is formed by

In this case, the floor panel 5 and the needle lower panel 1 are connected to the bead 15d of the closed cross section.
It is joined at a position that overlaps with the . Further, the rear end of the dart lower panel 1 extends in the longitudinal direction of the vehicle at a position farther inward from the inner surface of the front end of the side sill 7, and is joined to the surface of the bead 15d of the closed section. . That is, the side portions of the darts lower panel 1 constitute the upper part of the tire house 8, and constitute the front-rear portion of the side member 14. The bead 15d extends toward the rear of the vehicle on the surface of the bead 15d. In other words, the rear end of the dart lower panel 1 has a shape in which the front-back direction portion 15 of the side member 14 is cut away.

Therefore, in the above vehicle body front structure, the side member 14 of the reinforcement 10 reinforces the corner part from the side sill 7 to the tire house 8, increasing the rigidity of this corner part, and also strengthens the corner part from the side sill 7 to the tire house 8. The load is transmitted between the inner member 11 and the front end portion of the side sill 7 to prevent stress from being concentrated on the front end portion. Although the lower part of the darts lower panel 1 is not extended rearward to the point where it fully overlaps the side sill 7, the joint between the lower part of the darts lower panel 1 and the floor panel 5 is located at the bead 15d of the side member 14. and the bottom wall 12a of the lower cross member 12 and the side sill 7.
It intersects with the side sill 7 at a high-strength closed section formed by the inner surface of the floor panel 5, the lower darts panel 1, and the side sill 7, and this closed section structure ensures the rigidity of the section where the floor panel 5, the dart lower panel 1, and the side sill 7 intersect. .

In other words, since the front end of the side sill 7, which tends to have relatively low rigidity, is reinforced by the closed cross-section, the dussail, which is a separate member from the lower lower panel 1, is used to form the closed cross-section. Since the bottom wall 12a of the lower cross member 12 is used, the needle lower panel 1 and the floor panel 5 are
By providing the joint portion with the side sill 7 at a position corresponding to the front end of the side sill 7, the amount of extension of the lower part of the dart lower panel 1 toward the rear of the vehicle body can be reduced, and
The rear end of the dart lower panel 1 can be separated from the side sill 7 toward the inside of the vehicle body.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a perspective view showing the structure of the corner formed by the side sill and tire house of a car and its surroundings; Fig. 2 shows the connection relationship of each member at the front of the car body. Floor plan, 3rd
The figure is a front view of the same, Figure 4 is a plan view of the side member of the reinforcement, Figure 5 is a front view of the same, and Figure 6 is a plan view of the side member of the reinforcement.
The figure is a sectional view taken along the line A--A in FIG. 2. 1... Datsushi lower panel, 2... Engine room, 3... Cabin, 4... Front frame, 5... Floor panel, 6... Floor frame, 7... Side sill, 8... Tire house, 1
0...Reinforcement, 11...Joint member, 12...Dutch lower cross member,
12a...Bottom wall of the dart lower cross member (reinforcement member), 14...Side member (reinforcement), 15...Bead.

Claims (1)

[Scope of Claim for Utility Model Registration] A darts lower panel that partitions the cabin and engine room and whose lower part extends to the rear of the vehicle body and whose rear end is connected to the front end of the floor panel, and a side edge of the floor panel that extends in the front-rear direction. a frame extending along the floor panel and substantially parallel to the side sill at a position spaced apart from the extending side sill inwardly of the vehicle body, and having a front portion extending into the engine room; a tire house whose rear part bulges into the cabin; a tire house which is curved along an inner surface of the tire house which bulges into the cabin, and whose front end is attached to the frame;
The reinforcement includes a reinforcement whose rear end is joined to the inner surface of the side sill and whose middle part is joined to the inner surface of the tire house. A bead is formed that bulges toward the cabin, and the bead, the inner surface of the front end of the side sill, the bead and The dart lower panel has a closed cross-section extending in the longitudinal direction of the vehicle body and includes a reinforcing member formed separately from the dart lower panel so as to close the open cross-section formed by both of the side sills. The rear part of the rear part extends in the longitudinal direction of the vehicle body at a position farther inward than the side sill and is joined to the surface of the closed cross section, and the rear end of the dart lower panel and the front end of the floor panel means a front body structure of an automobile, characterized in that the structure is connected at a position corresponding to the closed section.