JP3925117B2 - Body front structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a front part of a vehicle body around a strut tower in an engine room.
[0002]
[Background Art and Problems to be Solved by the Invention]
Conventionally, in a vehicle body front structure around a strut tower in an engine room, a hood ridge and a side member, which are vehicle skeleton members, are provided on the upper and lower sides of the engine room, and the strut tower that wraps the suspension strut has a hood ridge and a side member. A structure provided over the two is known.
In this conventional structure, the force transmitted from the suspension is first transmitted to the strut tower, and is distributed and transmitted from the strut tower to the hood ridge and the side member, which are the skeleton members of the vehicle.
Therefore, the rigidity in the vehicle body front structure from the strut tower to the hood ridge and the side member greatly contributes to the suspension support rigidity.
When this suspension support rigidity is increased, the steering response is improved and the road noise can be reduced. Therefore, the rigidity of the front part of the vehicle body is improved to improve the steering response and the road noise. A reduction is desired.
[0003]
In recent years, as a method of assembling parts such as radiators and headlights to a vehicle body, there is a method in which a radiator, a headlight, etc. are assembled in advance by assembling them into a resin module, and this module is attached to the front of the vehicle body. Such a vehicle has a cantilever structure in which the left and right hood ridges and the front ends of the side members are not coupled to each other. With such a cantilever structure, the rigidity of the front part of the vehicle body is lowered, leading to a decrease in steering response and an increase in road noise.
Therefore, in order to increase the rigidity around the strut tower, a structure in which a hood ridge and a side member are connected by a reinforcement is known. As a result, the rigidity around the strut tower can be increased although the hood ridge and the side member are cantilevered.
[0004]
However, in the above-described conventional technology, the hood ridge is twisted because the upper part of the reinforcement is joined to only a part of the side surface of the hood ridge and the lower part of the reinforcement is connected to the side member. For such an input, stress tends to concentrate on the joint portion of the reinforcement, and further improvements in rigidity and durability have been desired.
[0005]
The present invention has been made paying attention to the above-mentioned conventional problems, and improves the suspension support rigidity by improving the rigidity around the strut tower, thereby improving the steering response and reducing the road noise. The purpose is that.
[0006]
[Means for Solving the Problems]
In order to achieve the above-described object, according to the present invention, a hood ridge (2) having an inner panel (22) and an outer panel (23) having a box cross-sectional shape is extended in the vehicle front-rear direction at an upper part of a side surface of a vehicle engine room. A side member (1) having a box cross-sectional shape with an inner panel (12) and an outer panel (13) is provided in the lower part of the side surface of the engine room so as to extend in the vehicle front-rear direction. A strut tower (3) is provided across the side member (1) and the hood ridge (2), and the strut tower (3) is formed in an inverted saddle shape that receives input from a suspension provided in the upper part. A spring support (31) is coupled to the side surface of the hood ridge (2), and under the strut housing (32) coupled to the lower portion of the spring support (31). Parts is coupled to the side member (1), wherein in the vicinity of the strut housing (32), said side member (1) and the hood ridge (2) reinforcement (4) for coupling the previous vehicle provided In the substructure,
The upper end portion of the strut housing (32) is coupled to the lower end portion of the support portion (31s) of the spring support (31), and the lower end portion of the strut housing (32) is connected to the inner panel (12) and the outer panel of the side member (1). The upper joint (15) of (13) is coupled to the flange (1f) standing on the upper end of the outer panel (13) or the upper end of the inner panel (12),
Flange (43), (45) provided at both front and rear ends of the reinforcement (4) is coupled to the strut housing (32), and the upper end of the reinforcement (4) is on the upper surface of the hood ridge (2). The lower end of the reinforcement (4) is connected to the side of the inner panel (12) of the side member (1) on the engine room side,
In the portion where the reinforcement (4) is provided, the upper flange (32a) provided at the upper end of the strut housing (32) is coupled to the inner panel (22) of the hood ridge (2), and the strut housing The lower end of (32) is coupled to the flange (1f),
The upper portion of the reinforcement (4) is coupled to the hood ridge (2) over the entire vertical direction, and the lower portion of the reinforcement (4) is coupled to the side member (1) over the entire lateral width. The means is characterized in that the reinforcement (4) is connected to the strut tower (3) by forming a box cross section (44) with the strut tower (3).
[0009]
【The invention's effect】
In the present invention, the upper part of the reinforcement that connects the hood ridge having the box cross-sectional shape and the side member having the box cross-sectional shape is coupled over the entire vertical width of the hood ridge, while the lower part of the reinforcement is connected to the left and right sides of the side member. In addition, the reinforcement is connected to the strut tower by forming a box cross-section with the strut tower, and the suspension is connected to the spring support to provide a rigid frame structure for the vehicle. The hood ridge, the reinforcement, and the side member can be dispersed and transmitted, and the stress can be efficiently transmitted in such a manner that stress concentration hardly occurs. Therefore, it is possible to improve the service scan Pension supporting rigidity, which makes it possible to reduce the increase of the steering response and road noise.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
First, FIG. 1 for explaining the configuration of the vehicle body front structure according to the embodiment is a perspective view showing the vehicle body front structure according to the embodiment.
In the figure, reference numeral 1 denotes a side member extending in the front-rear direction at the lower side of the side of the engine room E of the vehicle. The side member 1 combines a U-shaped inner panel 12 and a plate-shaped outer panel 13. The upper joint 15 and the lower joint 17 of the inner panel 12 and the outer panel 13 extend in the vertical direction.
[0013]
In the figure, reference numeral 2 denotes a hood ridge extending in the front-rear direction at the upper side of the engine room E of the vehicle. The hood ridge 2 is formed by welding a U-shaped inner panel 22 and a U-shaped outer panel 23 by welding. The upper joint portion 25 of the inner panel 22 and the outer panel 23 extends horizontally, and the lower joint portion 26 extends downward.
Further, the hood ridge 2 protrudes in the direction of the engine room E while wrapping around in an arc shape centering on the central portion of the spring support 31 at a position in front of a spring support 31 formed in an inverted saddle shape described later. A recessed portion 21 is formed.
[0014]
3 is a strut tower. The strut tower 3 includes an upper spring support 31 and a lower strut housing 32. The spring support 31 includes a support portion 31s formed in an inverted saddle shape to support a strut (not shown), and flange portions 31f and 31g erected on the vehicle outer side and the front side of the support portion 31s. Yes. The support portion 31s is provided with a mounting hole 31a for attaching the suspension to the central portion of the upper surface. The flange portions 31f and 31g are joined at their upper ends to the end on the engine room E side of the upper end portion of the hood ridge 2 by welding, and the coupling is a cross-sectional view taken along the line AA in FIG. 2 is coupled at a position as indicated by an imaginary line, and the wrap portion 21 is coupled along the wrap around the wrap portion 21. Note that FIG. 2 is shown by an imaginary line because the connection of the flange portion 31f does not actually appear. Further, the strut housing 32 is formed in a curved shape projecting toward the engine room E as shown in FIG. 3 which is a BB cross-sectional view of FIG. The lower end of the spring support 31 is coupled to the lower end of the support portion 31s, and the lower end is erected on the upper end of the outer panel 13 from the inner panel 12 of the side member 1 and the upper joint 15 of the outer panel 13 as shown in FIG. It is connected to the flange 1f. Flange 1f is the potato it may also be erected on the upper end of the inner panel 12.
[0015]
In addition, a reinforcement 4 is provided at the front end of the strut tower 3 to connect the side member 1 and the hood ridge 2. As shown in FIG. 3, the reinforcement 4 is coupled to the strut housing 32 by forming a box cross section 44. That is, the reinforcement 4 is formed in a substantially L-shaped cross-sectional shape, and flanges 43 and 45 provided at both front and rear end portions are welded and connected to the strut housing 32.
An upper flange 46 provided at the upper end portion of the reinforcement 4 is joined to the upper surface of the hood ridge 2 by welding at the turning portion 21, while a lower flange provided at the lower end portion of the reinforcement 4. 47 is joined to the side of the inner panel 12 of the side member 1 on the engine room E side by welding.
Further, in the portion where the reinforcement 4 is provided, the strut housing 32 has an upper flange 32a provided at the upper end portion thereof connected to the lower end portion of the inner panel 22 of the hood ridge 2 by welding, and the lower end portion is Like the other parts, the side member 1 is joined to a flange 1f provided at the outer end of the vehicle by welding.
Therefore, the upper end portion of the box cross section 44 formed by the reinforcement 4 and the strut housing 32 covers the entire upper and lower widths of the hood ridge 2 so as to include the upper and lower corners of the hood ridge 2 on the engine room E side. Are combined.
On the other hand, the lower end portion of the box cross section 44 is coupled over the entire width of the side member 1 in the left-right direction so as to include the left and right corners of the upper surface of the side member 1.
[0016]
Next, the operation of the embodiment will be described.
When a load is input to the vehicle body from a suspension (not shown), it is transmitted from the strut tower 3 to the hood ridge 2, the reinforcement 4, and the side member 1 as a skeleton member having a box cross-sectional shape and supported.
In this load transmission, from the spring support 31 to the hood ridge 2 in the present embodiment, the rotation of the hood ridge 2 in addition to the portion connected to the side surface of the hood ridge 2 on the outer side of the spring support 31. Furthermore, since the wrap portion 21 is formed of a surface having a substantially uniform distance from the center of the spring support 31, input can be transmitted without causing stress concentration. Therefore, the input from the suspension can be transmitted to the hood ridge 2 more efficiently than in the past.
[0017]
Furthermore, since the box cross section 44 is formed by the strut tower 3 and the reinforcement 4, the rigidity of the strut tower 3 itself is improved, and the connection strength between the hood ridge 2 having the box cross section and the side member 1 is high. The load input to the strut tower 3 is transmitted to the hood ridge 2 and the side member 1 more efficiently than in the past.
[0018]
In addition, the box cross section 44 formed by the strut tower 3 and the reinforcement 4 is coupled with the full width in the vertical direction to the wrapping portion 21 of the hood ridge 2 having a box cross section. Stress concentration is unlikely to occur, efficient load transmission is achieved, and the box cross-sectional side member 1 is coupled with the full width in the left-right direction, so stress concentration is unlikely to occur in load transmission. Efficient load transmission is achieved and rigidity is improved.
[0019]
As described above, in the present embodiment, the suspension support rigidity by the strut tower 3 is improved as compared with the conventional case, and the steering response is improved and the road noise is reduced.
[0020]
The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and even if there is a design change without departing from the gist of the present invention. It is included in the present invention.
For example, in the present embodiment, the wraparound portion 21 is provided in front of the spring support 31, but it may be provided behind the spring support 31, or may be provided in both front and rear.
In addition, it is preferable to form the wrap portion 21 in an arc shape centering on the center of the input from the suspension in the spring support 31 from the viewpoint of input transmission, but it is formed in such an arc shape. Even if not, the input can be transmitted more efficiently than in the prior art.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a vehicle body front structure according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a cross-sectional view taken along line BB in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Side member 1f Flange 2 Hood ridge 3 Strut tower 4 Reinforce 12 Inner panel 12, 13 Both panels 13 Outer panel 15 Upper junction part 17 Lower junction part 21 Turning-in part 22 Inner panel 23 Outer panel 25 Upper junction part 26 Lower junction Part 31s support part 31 spring support 31f flange part 31a mounting hole 32 strut housing 32a upper flange 43, 45 flange 44 box section 46 upper flange 47 lower flange E engine room

Claims (1)

A hood ridge (2) having an inner panel (22) and an outer panel (23) having a box cross-sectional shape extending in the vehicle front-rear direction is provided at the upper part of the side of the engine room of the vehicle. A side member (1) having a box cross-sectional shape with an inner panel (12) and an outer panel (13) is provided in the lower portion so as to extend in the vehicle front-rear direction. The side member (1), the hood ridge (2), The strut tower (3) is provided across the hood, and the strut tower (3) is provided with a spring support (31) formed in an inverted saddle shape that receives input from a suspension provided at the upper portion thereof. The lower end of the strut housing (32) connected to the side of the spring support (31) is connected to the side member (1). , In the vicinity of the strut housing (32), the vehicle body front structure reinforcement (4) is provided for coupling said side member (1) the hood ridge (2) and,
The upper end portion of the strut housing (32) is coupled to the lower end portion of the support portion (31s) of the spring support (31), and the lower end portion of the strut housing (32) is connected to the inner panel (12) and the outer panel of the side member (1). The upper joint (15) of (13) is coupled to the flange (1f) standing on the upper end of the outer panel (13) or the upper end of the inner panel (12),
Flange (43), (45) provided at both front and rear ends of the reinforcement (4) is coupled to the strut housing (32), and the upper end of the reinforcement (4) is on the upper surface of the hood ridge (2). The lower end of the reinforcement (4) is connected to the side of the inner panel (12) of the side member (1) on the engine room side,
In the portion where the reinforcement (4) is provided, the upper flange (32a) provided at the upper end of the strut housing (32) is coupled to the inner panel (22) of the hood ridge (2), and the strut housing The lower end of (32) is coupled to the flange (1f),
The upper portion of the reinforcement (4) is coupled to the hood ridge (2) over the entire vertical direction, and the lower portion of the reinforcement (4) is coupled to the side member (1) over the entire lateral width. A vehicle body front structure , wherein the reinforcement (4) is connected to the strut tower (3) by forming a box cross section (44) between the reinforcement (4) and the strut tower (3) .

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