JPH07187003A - Car body front structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a vehicle body front structure capable of sufficiently and reliably absorbing the collision energy regardless of the direction in which an obstacle collides. [Structure] The rear end portion 10b is connected to an intermediate portion of the front side member 1, and the front end portion 10a is extended obliquely outward to provide a reinforcing member 10 positioned near the front end of the hood ridge panel 5. Even if the obstacle collides obliquely, the reinforcing member 10 is crushed and absorbs the collision energy. Further, even if the obstacle collides from the front, the collision energy is applied from both the tension rod bracket 8 and the reinforcing member 10 in a well-balanced manner, so that the front side member 1 is securely collapsed without being broken.

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.

[0002]

2. Description of the Related Art As a conventional vehicle body front structure,
For example, the ones shown in FIGS. 7 to 9 are known (for a similar structure, see Japanese Utility Model Publication No. 50-114818). Since the structures described below are symmetrical, only the left structure is shown in the figure as a representative. 8 and 9 show a structure in which the bumper armature is omitted.

Reference numeral 1 denotes a front side member, which has a closed cross-section structure in which a generally U-shaped front side member main body 2 and a plate-like closing plate 3 are joined to each other. It is formed on each side. A first cross member 4 having a closed cross section is arranged between the left and right front end portions 1a of the front side member 1, and a hood ridge panel 5 having an L-shaped cross section is connected to the outside of the front side member 1. A wheel house 5a is formed on the hood ridge panel 5. A stay 6 is attached to the front end 1a of the front side member 1.
The bumper armature 7 is attached via.

A tension rod bracket 8 having a downward U-shaped cross section is obliquely arranged between the middle portion of the front side member 1 and the first cross member 4. The rear end 8 of this tension rod bracket 8
b is connected along the lower surface of the front side member 1, and the front end portion 8a is connected to the lower surface of the first cross member 4. The bent portion of the tension rod bracket 8 has a larger vertical width than other portions, and the rigidity of this portion is increased. A suspension member 9 along the vehicle width direction is also provided at a position of the front side member 1 corresponding to the wheel house 5a (see FIGS. 8 and 9).

[0005]

However, in such a conventional technique, the structure in which the front side member 1 and the first cross member 4 are simply connected by the tension rod bracket 8 which is obliquely arranged. Therefore, for example, as shown in FIG. 8, when the obstacle G collides with the vehicle body at an angle, there is no member in the vehicle body structure capable of absorbing the collision energy, and therefore the collision energy remains close to the passenger compartment. It reaches to 9,
The suspension member 9 may be damaged. Therefore, as a countermeasure therefor, it is necessary to increase the plate thickness of the suspension member 9 or add a reinforcing material, which is disadvantageous in terms of weight and cost. As is known in Japanese Utility Model Publication No. 50-114817, an oblique reinforcing member connected to the first cross member is also provided outside the front side member, and the collision energy of an obstacle hit diagonally by this reinforcing member is provided. Although a structure that receives the collision is also known, since the reinforcing material is connected to the first cross member to form a highly rigid triangular structure, it is not possible to absorb the collision energy in this part, and in the end, This will cause damage to nearby suspension members and the like.

Further, when the obstacle G hits the vehicle body from the front as shown in FIG. 9, the front side of the front side member 1 and the tension rod bracket 8 are crushed and some collision energy is absorbed. Tension rod bracket 8 only inside the front side member 1
Since the input / output balance of the input applied to the front side member 1 is poor, the front side member 1 is not supported from the vicinity of the mounting portion of the tension rod bracket 8.
Will be broken, and it will not be possible to absorb sufficient collision energy, and the measures described above will be necessary.

The present invention has been made by paying attention to such a conventional technique, and it is possible to sufficiently and reliably absorb the collision energy of an obstacle regardless of the direction in which the obstacle collides. A vehicle body front structure is provided.

[0008]

In order to achieve the above object, a vehicle body front structure according to the present invention has a rear end portion connected to an intermediate portion of a front side member, and
The front end portion is extended obliquely outward and a reinforcing member is provided at least near the front end of the hood ridge panel.

[0009]

Since the reinforcing member extending obliquely is also arranged outside the front side member, when the obstacle collides with the vehicle body obliquely, the reinforcing member is crushed by the obstacle and the collision occurs. It will absorb energy.
Therefore, the collision energy is not transmitted to the member close to the vehicle compartment, and it is not necessary to take measures to increase the plate thickness of such a part or reinforce it.

Also, when an obstacle collides from the front,
The collision energy is applied to the front side member from both the inner tension rod bracket and the outer reinforcing member in a well-balanced manner, so that the front side member is crushed securely without breaking and the collision energy can be sufficiently absorbed. Become.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. The same parts as those in the prior art are designated by the same reference numerals, and a duplicate description will be omitted.

1 to 5 are views showing a first embodiment of this embodiment. In this embodiment, the front side member 1
An oblique reinforcing member 10 is also arranged outside the. The reinforcing member 10 has a hat-shaped cross section, and has a closed cross section structure by being joined to the lower surface of the hood ridge panel 5. A flange 10f that is open in three directions is formed at the rear end of the reinforcing member 10, and each of the flanges 10f is joined to the closing plate 3 in the middle of the front side member 1. The front end portion 10a of the reinforcing member 10 extends obliquely outward and is located exactly at the front end portion of the hood ridge panel 5. Further, of the front side member 1, a reinforcement 11 having a U-shaped cross section is provided inside from a position where the rear end portion 10b of the reinforcing member 10 is attached to the rear side.

Next, a state in which the vehicle body of this embodiment collides with the obstacle G will be described with reference to FIGS. 4 and 5.

Oblique collision of obstacles (see FIG. 4)

When the obstacle G collides obliquely with the vehicle body, the reinforcing member 10 is crushed, so that the collision energy of the obstacle G can be reliably absorbed. Therefore, since the collision energy of the obstacle G is not transmitted to the suspension member 9 or the like close to the vehicle compartment, the suspension member 9 is not deformed. In addition, the reinforcing member 10
Since the rear end portion 10a and the rear end portion 8b of the tension rod bracket 8 are connected to substantially the same midway portion of the front side member 1, the tension rod bracket 8 serves as a "replacement" for the rear end portion 10b of the reinforcing member 10. Thus, the crushing deformation of the reinforcing member 10 as described above can be performed more reliably.

Frontal collision of an obstacle (see FIG. 5)

When the obstacle G collides with the vehicle body from the front, the tension rod bracket 8, the front portion of the front side member 1 and the reinforcing member 10 are all crushed, so that the collision energy of the obstacle G is ensured. Can be absorbed into. The three members on the front side of the vehicle body are thus equally crushed for the following three reasons.
First, the tension rod bracket 8 and the reinforcing member 1
Since 0 is located at the inner and outer symmetrical positions of the front side member 1, collision energy is applied to the front side member 1 in a well-balanced manner from the inside and outside directions. Secondly, the tension rod bracket 8 and the reinforcing member 10 mutually "replace". The third reason is that the reinforcement 11 as described above is provided at an intermediate portion of the front side member 1. Particularly, since the reinforcement 11 is provided on the rear side of the front side member 1, when collision energy is applied from the front side, the members on the rear side of the reinforcement 11 do not collapse,
Since only the front member is crushed, it is possible to prevent the collision energy from being applied to the rear member close to the vehicle compartment. As described above, according to this embodiment, the collision energy of the obstacle G can be reliably and sufficiently absorbed regardless of the direction in which the obstacle G hits.

FIG. 6 is a diagram showing a second embodiment of the present invention. In this embodiment, the reinforcing member 12 has a stay-corresponding portion 12a integrally formed on the front portion of the hood ridge panel 5 and extended to the front side. The bolt / nut means 1 is attached to the front end of the stay-corresponding portion 12a.
The bumper armature 7 is attached via the 3. By doing so, the conventional stay can be eliminated. Alternatively, the reinforcing member 12 itself may be extended to the front side and the bumper armature 7 may be attached thereto without providing the stay-corresponding portion 12a.

In the above two embodiments, the reinforcing members 10 and 12 have an inverted hat cross-sectional shape for joining to the lower surface of the hood ridge panel 5. However, the reinforcing member itself is separated from the hood ridge panel 5 in a closed cross-section structure. It may be a body or a structure having another cross-sectional shape.

[0020]

The vehicle body front structure according to the present invention has the contents as described above, and since the reinforcing member extending obliquely is arranged outside the front side member, the obstacle is obstructed. When the vehicle collides obliquely with the vehicle body, the reinforcing member is crushed by the obstacle and absorbs the collision energy. Therefore, the collision energy is not transmitted to the member close to the vehicle compartment, and it is not necessary to take measures to increase the plate thickness of such a part or reinforce it.

Also, when an obstacle collides from the front,
The collision energy is applied to the front side member from both the inner tension rod bracket and the outer reinforcing member in a well-balanced manner, so that the front side member is crushed securely without breaking and the collision energy can be sufficiently absorbed. Become.

[Brief description of drawings]

FIG. 1 is a perspective view showing a vehicle body front structure according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line SA-SA shown in FIG.

FIG. 3 is a schematic plan view seen from a DA direction shown by an arrow in FIG.

FIG. 4 is a plan view corresponding to FIG. 3 showing an oblique collision state of an obstacle.

FIG. 5 is a plan view corresponding to FIG. 3 showing a frontal collision state of an obstacle.

FIG. 6 is a perspective view showing a vehicle body front structure according to a second embodiment of the present invention.

FIG. 7 is a perspective view showing a conventional vehicle body front structure.

FIG. 8 is a schematic plan view showing a conventional oblique collision state of an obstacle.

9 is a plan view corresponding to FIG. 8 showing a frontal collision state of an obstacle.

[Explanation of symbols]

 1 Front Side Member 4 First Cross Member 5 Hood Ridge Panel 8 Tension Rod Bracket 10 and 12 Reinforcement Member 7 Bumper Armature 11 Reinforce

Claims (3)

[Claims] 1. A first cross member is arranged between the front ends of the left and right front side members, and a hood ridge panel is connected to the outside of the front side members.
A front body structure of an automobile in which a front end of a tension rod bracket whose rear end is connected to an intermediate portion of a front side member is extended obliquely inward and connected to a first cross member. A front structure of a vehicle body, comprising a reinforcing member which is connected to an intermediate part of the member and whose front end is extended obliquely outward and is located at least near the front end of the hood ridge panel. 2. The vehicle body front structure according to claim 1, wherein a front end portion of the reinforcing member is located in front of the hood ridge panel, and a bumper armature is attached to the front end portion. 3. The vehicle body front structure according to claim 1, wherein a reinforcement is provided from a portion of the front side member where the rear end portions of the tension rod bracket and the reinforcing member are connected to the rear side.