JP2001130450A - Front body structure automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a front body structure that improves the efficiency of energy absorption upon an excessive frontal input to an automobile. SOLUTION: The front body structure for an automobile comprises a longitudinally extending apron side member 1 at each end of a widthwise extending bulkhead 3, and an apron panel 6 disposed by the side of each apron side member 1 and swollen to form a strut tower 7 and a wheel house 8. A bulkhead piece 10 is arranged near the place where each apron side member 1 is fixed to the bulkhead 3. The bulkhead pieces 10 increase the rigidity of the bulkhead 3 and receive the apron side members 1 rigidly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body front structure applied to a passenger car or a passenger car.

[0002]

2. Description of the Related Art A general structure of a front portion of a vehicle body of a passenger car or a passenger car will be described with reference to FIG. Reference numeral 1 denotes an apron side member, two of which have a rectangular cross section and extend in the vehicle longitudinal direction at an interval. A member lower arm 2 is attached to the lower rear end of the apron side member. A dash panel 3 is provided vertically at the rear end of the apron side member 1, and a cowl member 4 is provided above the dash panel 3. On both upper sides of the cowl member 4, front pillars 5 are provided.

[0005] An apron panel 6 is provided outside the apron side member 1, and the apron panel 6 and the dash panel 3 form an outer periphery of an engine room. The lower part of the apron panel 6 is bulged, and a strut tower 7 and a wheel house 8 are formed. A strut bar (not shown) is housed inside the strut tower 7, and an upper end thereof is provided with a strut bracket 9.
It is fixed to.

[0004]

In this structure, even if the vehicle is completely maintained, if a collision with an object or another vehicle occurs from the front due to the driver's carelessness, etc. The collision load is first input to the apron side member 1. This apron side member 1
The portion of the dash panel 3 to which is attached is a flat plate having no cross section and has a structure that cannot withstand a large load, so that the load generated in the apron side member 1 cannot be efficiently absorbed. . In addition, the deformation of the dash panel 3 increases.

As a prior art in the same technical field as the present invention, there is one disclosed in Japanese Patent Application Laid-Open No. Hei 5-319309. The present invention provides a front side member with a connecting surface along the vehicle front-rear direction, and a dash panel along the vehicle front-rear direction, in order to enhance the resistance to a large mechanical load along the vehicle front-rear direction. The panel surface is provided on substantially the same plane as the connecting surface. With this structure, the mechanical load applied to the front side member in the vehicle front-rear direction is smoothly transmitted to the dash panel.

[0006] As another example of the prior art, Japanese Patent Laid-Open No.
There is one disclosed in Japanese Patent Publication No. 0-316026. According to the present invention, a reinforcing member having one end joined to the rear upper portion of the suspension tower and the other end sandwiched between the cowl portion and the dash panel is provided. As a result, the rear end of the suspension tower is joined to the dash panel, so that the input load from the front suspension is received by the dash panel and the cowl section via the suspension tower and the reinforcing member, so that high torsional rigidity can be obtained. In addition, the vibration of the body can be reduced and the steering stability can be obtained.

The present invention has a configuration different from the above prior art,
In other words, an object of the present invention is to provide a vehicle body front structure capable of withstanding a large load from the front by a structure in which a dash member is mounted around a dash panel.

[0008]

According to the present invention, as a means for solving the above problems, the invention described in claim 1 is provided.
At both ends of a dash panel extending in the width direction of the vehicle body, an apron side member extending in the front-rear direction of the vehicle body is provided, and an apron panel is provided on a side of the apron side member. A dash member is provided near a position where the dash panel is attached to an apron side member in a vehicle body front structure in which a house is formed.

According to a second aspect of the present invention, in the first aspect, an upper end of the dash member is extended to a position of a strut bracket at an upper end of the strut tower, and a lower end is formed at a lower portion of the dash panel. It is connected to the lower part of the member lower arm.

According to a third aspect of the present invention, in the first aspect, the dash member is provided inside the strut tower and the wheel house.

According to a fourth aspect of the present invention, in the first aspect, the dash member has an L-shaped cross section inside the strut tower and a U-shaped section in the wheel house. It is characterized by being formed in a shape.

With such a configuration, the dash member provided near the attachment position of the apron side member to the dash panel supports the apron side member against an excessive load from the front of the vehicle body. Absorbed.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. According to the present invention, a dash member 10 is provided in the vicinity of the attachment position of the apron side member 1 to the dash panel 3 (FIGS. 2 and BB cross sections showing the AA cross section of FIG. 1 are shown. (See FIG. 3). A part of the dash member 10 is provided inside the strut tower 7 and the wheel house 8 as shown by a broken line in FIG. 2 to 5, reference numeral 11 denotes a dash side panel, and reference numeral 12 in FIGS. 4 and 5 denotes a dash lower cross member.

The cross section of the dash member 10 is shown in FIG.
As shown in FIG. 4 showing a cross section taken along line CC of FIG. 1, the inside of the strut tower 7 is formed in an L-shape.
As shown in FIG. 5 showing a D section, the wheel house 8 is formed in a U-shape. As shown in FIGS. 1 to 3, the upper end of the dash member 10 extends to the position of the strut bracket 9 at the upper end of the strut tower 7, and the lower end is connected to the lower portion of the lower member 2 of the dash panel 3. .

By attaching the dash member 10 around the dash panel 3 as described above, the strength of the dash panel 3 itself is significantly improved as compared with the conventional flat dash panel. For this reason, when an excessive input is received from the front of the vehicle, the load is transmitted from the apron side member 1 to the dash panel 3, but since the dash panel 3 sufficiently receives the load, the apron side member 1 is deformed and dashed. Energy can be absorbed without moving the panel 3 backward. If the deformation reaches the periphery of the dash panel 3 in the last step of the collision, the dash member 10 deforms and absorbs energy.

FIG. 6 shows another example of the embodiment of the present invention. In this embodiment, the dash panel 3
A dash member 10 is mounted around the vehicle from the passenger compartment side, not from the engine compartment side. What is indicated by reference numeral 13 is a floor panel. Also in this structure, since the rigidity of the dash panel 3 is higher than that of the conventional one, it is possible to effectively prevent the dash panel 3 from being deformed by an excessive input from the front.

[0017]

According to the present invention, since the vehicle body front structure is as described above, the dash member reduces the strength of the dash panel in the vicinity of the apron side member mounting portion. As a result, the rigidity of the dash panel is improved compared to the conventional one. As a result, the energy when the vehicle receives a large load from the front can be efficiently absorbed. The dash member increases the rigidity around the dash panel, thereby reducing the amount of rearward movement of the dash panel. When the impact load is large and the dash panel is deformed,
The dash member also deforms and absorbs its energy. Since the engine room is not narrowed, the rearward movement of the engine can be secured, and the cabin space is not reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a schematic view showing a cross section of a portion along the line AA in FIG. 1;

FIG. 3 is a schematic view showing a cross section of a portion along the line BB of FIG. 1;

FIG. 4 is a schematic view showing a cross section of a portion along line CC in FIG. 1;

FIG. 5 is a schematic view showing a cross section of a portion along line DD of FIG. 1;

FIG. 6 is a perspective view showing another example of the embodiment of the present invention.

FIG. 7 is a perspective view showing a conventional structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Side member 2 Member lower arm 3 Dash panel 6 Apron panel 7 Strut tower 8 Wheel house 9 Strut bracket 10 Dash member

Claims (4)

[Claims] An apron side member extending in the front-rear direction of the vehicle body is provided at both ends of a dash panel extending in a lateral width direction of the vehicle body, and an apron panel is provided on a side of the apron side member, and the apron panel is expanded. A vehicle body front structure in which a strut tower and a wheel house are formed, wherein a dash member is provided near an attachment position of the dash panel to an apron side member. 2. The dash member according to claim 1, wherein an upper end of the dash member extends to a position of a strut bracket at an upper end of the strut tower, and a lower end is connected to a lower portion of a lower member of the dash panel. Car body front structure. 3. The vehicle body front structure according to claim 1, wherein the dash member is provided inside the strut tower and the wheel house. 4. A cross section of the dash member is formed in an L shape inside the strut tower, and is formed in a U shape in a wheel house portion.
2. The vehicle body front structure according to claim 1.