KR20020009930A - A Fender Shield Reinforcement of Vehicles - Google Patents

Abstract

PURPOSE: Fender reinforcement of a vehicle is provided to improve axial durability of front end by adding uneven forming. CONSTITUTION: Fender reinforcement of a vehicle is composed of forming(11) continued up and down of a vehicle to extent of a regular length, protruding on the outside of reinforcement(10') wrapping a front end panel(20) and a fender shield(30). Though the length of forming(11) is formed like width of reinforcement(10') or applied to the only rigid and fragile parts on the base of testing data it doesn't matter. And this uneven forming(11) is arranged consecutively at regular intervals (d) in the direction of crossing upward and downward from the vehicle. There are three forming parts here but if there are several forming parts, it is desirable.

Description

Fender Shield Reinforcement of Vehicles

The present invention relates to a fender shield reinforcement of an automobile, and more particularly, to a fender shield reinforcement for improving vertical durability of the front end by adding an uneven form to the fender shield reinforcement. will be.

In general, there are front and side members forming the closed section of the engine room in the body skeleton model (see FIG. 1), which is a stage before the door or various components are mounted on the body, and the front member is called the front end panel 20. The side member is called the front side member 31. However, the area actually bonded between the two members is the fender shield 30 and the front end panel 20 of the front side member 31, which are usually joined by welding, to prevent the welding site from breaking and to protect the outer plate. In order to reinforce the reinforcement (hereinafter referred to as "rain force") is added.

In general, according to a known technique, the rigidity of the outer plate is known to depend on the thickness of the steel sheet, in fact, the effect of curvature is much greater than the thickness, and the size of the outer plate is also related thereto. In fact, reducing the radius of curvature can increase the shell stiffness without increasing the thickness, and this method is also very advantageous in terms of weight reduction of the vehicle body.

FIG. 2 is a cross-sectional plan view illustrating a state in which a conventional fender shield rain force is coupled to portion A of FIG. 1. In FIG. 2, the front end panel 20 and the fender shield 30 which partition the engine room from the outside are installed at the front and side of the vehicle, respectively, and both ends thereof are joined by welding 50. The rain force 10 is additionally installed in a 'b' shape as it surrounds the outer portion of the corner formed by the two members.

The rain force 10 configured as described above can obtain a certain level of stiffness effect, but the body durability test (generally Belgian road, unpaved road, gravel road, puddle and high speed road) which is usually performed on a finished vehicle before mass production In the harsh condition test combined with various driving surfaces, etc., the rain force 10 of the above structure does not effectively absorb the bending load and the torsional load generated at the front end 22, and the portion 22 is rigid. A serious problem arises, such as the welding point is broken by fragility.

In fact, as a result of endurance analysis of the front end part according to the conventional rain force described above, when the thickness of the fender shield rain force is 1.4t, the stress distributed at the front end part is 20.1 (kg _f / mm ² ) and the service life of the welding spot is Becomes 1100 km. Here, the service life of the welding point means the driving distance in the performance test until the welding breaks.

The present invention has been proposed to solve the above problems, the object of which is to form a foam of the structure to reduce the radius of curvature locally in the fender shield reinforcement connecting the front end panel and the fender shield of the front end portion Increasing the stiffness to improve the endurance performance, such as the increase of the service life of the welding spot and the reduction of the distribution load.

Another object of the present invention is to form a foam as described above to reduce the thickness of the outer plate to realize a lighter weight of the vehicle body.

1 is a perspective view of a typical body skeleton model,

FIG. 2 is a cross-sectional plan view showing a state of engagement of a conventional fender shield reinforcement to the portion A of FIG.

3 is a cross-sectional view showing a coupling state of the fender shield reinforcement of the present invention to the portion A of FIG.

Figure 4 is a cross-sectional view showing a coupling state of the fender shield reinforcement according to another embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10, 10 ', 10 ": Fender Shield Rain Force 11: Foaming

20: front end panel 22: front end end

30: fender shield 31: front side member

50: weld

The present invention researched and developed in order to achieve the above object, in the fender shield reinforcement is added to the portion where the fender shield and the front end panel of the automobile is joined, the fender shield reinforcement on the surface facing outward The fender shield reinforcement of the automobile, characterized in that the forming having at least two unevenness continuous in the vertical direction.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in more detail.

Figure 3 is a cross-sectional view showing a coupling state of the fender shield rain force of the present invention to the portion A of FIG. Referring to FIG. 3, a foaming 11 is formed to protrude to the outer surface of the rain force 10 ′ surrounding the front end panel 20 and the fender shield 30 so as to extend a predetermined length in the vertical direction of the vehicle. The length of the forming 11 may be formed by the width of the rain force 10 'or may be applied only to the stiffness weakening area based on test data. In addition, the uneven forming 11 is continuously arranged at a predetermined interval d in the transverse direction of the rain force, that is, the direction crossing with the vertical direction of the vehicle. Of course, the present invention was implemented to have three forming parts, but it is preferable to have a plurality of forming parts without necessarily being limited thereto.

One embodiment of the shape for the forming is square as shown in FIG. 3. This not only increases the rigidity in the vicinity of the forming 11 by forming a forming 11 having a square that locally protrudes the outer surface without increasing the thickness of the fender shield reinforcement 10 ′, By dividing, the outer plate stiffness is increased, and the stress applied to the front end end 22 is reduced, thereby extending the welding point life 50 between the two members 20 and 30. In other words, by forming the foaming 11 in the rain force 10 ', the same rigidity as desired can be obtained and the thickness of the outer plate can be reduced, thereby greatly contributing to the weight reduction of the vehicle body.

Another embodiment of the shape for the forming is a wave-shaped forming having a curved surface as shown in FIG. 4. As shown in FIG. 4, when the uneven form 11 rounded in the vertical direction of the vehicle is formed on the outer surface of the fender shield reinforcement 10 ″, the local curvature radius r of the portion is greatly reduced to increase the rigidity of the outer plate. And the distribution stress of the front end end 22 and the welding life between the front end panel 20 and the fender shield 30 is greatly improved.

According to the front end endurance analysis results for the foaming formed rain force, even if the thickness of the fender shield rain force is reduced to 1.2t (formerly 1.4t), the weld life and the stress at the front end are 17.3kg _f / mm at 4000km, respectively. ² (formerly 20.1kg _f / mm ² at 1100km).

As described in detail above, the present invention forms a plurality of formings having irregularities in cross-section on the fender shield reinforcement connecting the fender shield and the front end panel to reduce the stress applied to the fender shield and the front end panel including the welding point. By reducing the length of the weld life and the thickness of the outer plate for the same target stiffness, there is a unique effect that the body weight can be realized.

Claims (3)

In a fender shield reinforcement padded to a portion where the fender shield 30 and the front end panel 20 of a vehicle are joined to each other, the fender shield reinforcement is at least continuous in the up and down direction of the vehicle body on a surface facing outwardly. A fender shield reinforcement of an automobile, characterized in that a forming (11) having two or more unevennesses is formed. The fender shield reinforcement of claim 1, wherein the forming having the unevenness is a square shape. 2. The fender shield reinforcement of claim 1, wherein the forming having the unevenness is a wave shape.