JP6706120B2 - Mounting structure for vehicle exterior members - Google Patents

Description

The present invention relates to a vehicle exterior member attachment structure for attaching an exterior member to a vehicle body.

Vehicles having a high vehicle height such as trucks are provided with a vehicle exterior member at a lower position of the vehicle in order to prevent a passenger vehicle having a low vehicle height from colliding with the vehicle. The vehicle exterior member is attached by a stay member or the like connected to a side rail of the vehicle body.
By the way, it is said that it is desirable that a desired load distribution is generated when stress is applied to the exterior member due to a collision or the like, and it is necessary to consider design optimization in consideration of the balance between each weight and the diving performance. That is, according to the notification that defines the safety standards of Article 18-2 for road transport vehicles and the technical standards of the inrush prevention device, the load is small on both outside and the center of the exterior member, and slightly outside the center. It is preferable that the size becomes large, and in some cases, it is standardized as a vehicle standard by the country.

The load distribution is shown in FIG.
In FIG. 11, one end of the stay member 130 arranged on the extension surface of the side wall is attached downward to each side wall of the side rail 100 on the vehicle body side, and the exterior member 110 is attached to the other end side of the stay member 130. . In this structure, when a stress is applied from the exterior member side due to a collision or the like, a state close to a suitable load distribution is obtained based on the strength design of the material. However, if the load distribution is made suitable in the central portion and in the vicinity thereof, the load on both ends of the exterior member will be insufficient. On the other hand, in order to design to satisfy the P1 load, which is the weakest part, in terms of strength, it is necessary to increase the thickness of the entire stay member. It is in a spec state and is not suitable from the viewpoint of optimal design.

In Patent Document 1 which is a conventional technique, the exterior member is supported by a support member corresponding to a stay member, and the support member is provided below the first attachment portion that is attached by being joined to the vehicle body frame. A second mounting portion that is positioned and joined to the exterior member and is mounted, and an intermediate portion that is positioned between the first mounting portion and the second mounting portion, and the second mounting portion with respect to the first mounting portion. It has been proposed that the intermediate portion is bent outward in the vehicle width direction so as to extend obliquely downward from the lower end portion of the first mounting portion in order to separate the intermediate portion outward in the vehicle width direction.

Further, in Patent Document 2, the mounting bracket is formed of a vertically long rectangular plate member and a rectangular plate member integrally extending from a lower side edge of the rectangular plate member, and the rectangular plate member is bent at a right angle. It is composed of a vertically long stay plate formed and a mounting piece that extends outward from the stay plate in the vehicle width direction and that supports the protector body. A mounting hole for fixing with a rivet is formed. A support plate is provided along the upper and lower edges of the stay plate in the direction opposite to the mounting piece so as to form a T-shaped horizontal section with the stay plate, and between the mounting piece and the support plate along the stay plate. The upper and lower ribs are provided so as to extend horizontally and connect the attachment piece and the support plate.

JP 2006-0888905 A JP, 2008-062838, A

However, it is difficult to distribute the load in a well-balanced manner or to prevent it from becoming an excessive specification even by devising the conventional technique, and it is impossible to satisfy the proper standard because stress is applied to the collision side with an improper load distribution. There's a problem.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mounting structure for a vehicle exterior member that can obtain an appropriate load distribution with respect to stress application.

In the first aspect of the vehicle exterior member mounting structure of the present invention, one side is fixed to both side wall surfaces of the side rail of the vehicle main body in the vehicle width direction and extends downward to extend in the vehicle width direction. A stay member having at least one bend on the outside and an exterior member attached to the other side,
The stay member, in the longitudinal direction both end portions vehicle, a flange portion extending at least in a vehicle width direction outer side is provided, among the flange portion, the flange portion of the vehicle both before and after the forward side, along the flange surface phosphorus Force material is provided,
The reinforcement member has a side portion one end side fixed to the flange portion, and a side portion other end side spaced from the flange portion so that the stay member is closer to the flange portion than the other flange portion. It is characterized in that it is fixed and at least a part of the flange portion is closed .

In another aspect of the invention of a mounting structure for a vehicle exterior member, in the above-described aspect, the stay member extends on the other side along the vehicle width direction and extends beyond the width of the stay member main body on both sides. It is characterized in that it has an exterior member attachment surface and is provided with an attachment portion for the exterior member facing the vehicle front- rear direction rear side.

In another aspect of the invention, there is provided the vehicle exterior member mounting structure according to the above aspect, wherein the stay member is provided with a reinforcing plate on a side of the exterior member mounting portion.

In the invention of a mounting structure for a vehicle exterior member of another mode, in the above mode, one side end of the reinforcing plate is fixed to an inner surface of the flange, and the other end of the side is spaced from the flange. It is characterized in that it is fixed to a stay member and a part of the flange portion is closed.

In another aspect of the invention of a mounting structure for a vehicle exterior member, in the above-described embodiment, two stay members are arranged in a vehicle width direction, and a space W0 between both stay members at the mounting position on the one side and both stays. The space W1 at the mounting position on the other side of the member has a relationship of W0<W1.

In another aspect of the invention, there is provided the vehicle exterior member mounting structure according to the above aspect, wherein the flange portion has a shape along a bend of the stay member.

In another aspect of the invention of an attachment structure of a vehicle exterior member, in the above-mentioned aspect, the reinforcement member has a shape along the shape of the stay member, and a shape that extends over at least one bend of the stay member. It is characterized by having.

According to another aspect of the invention, there is provided a vehicle exterior member mounting structure, wherein the flange portion is provided at least between the one-side mounting surface and the other-side mounting surface. To do.

Invention of the mounting structure of another embodiment of the vehicle exterior member, in the embodiment, the flange portion, the one extending to the mounting surface distal end side of the side direction after car both front with a flange portion in the vehicle longitudinal direction rear side The front flange portion extends to the base end side of the one mounting surface.

According to another aspect of the invention of an attachment structure for a vehicle exterior member, in the above-described aspect, the reinforcement material has a length of 50% or more with respect to a total length of the flange portion provided with the reinforcement material. Characterize.

Another aspect of the invention of a mounting structure for a vehicle exterior member in the above aspect is that the stay member and the flange portion are integrally formed.

According to the present invention, it is possible to obtain a proper load distribution according to a proper distribution at the time of collision, and at the most disadvantageous bumper end load (point P1), the bending moment M acting directly on the stay can be determined. It can be made smaller, the load peak can be improved, the safety standard can be satisfied, and there is a good balance of the sneaking-in prevention effect over the entire vehicle width direction. In addition, the reinforcement member also brings about an effect of suppressing torsional deformation that acts on the stay member.

Also, when the passenger car collides with both ends of the exterior component, the distance between the action point acting on the exterior component and the reaction point acting on the stay member is reduced (the L length shown in the figure can be shortened). The moment applied to the outside of the exterior member contacting portion is reduced, and as a result, there is an effect of improving the undercut prevention performance.

Further, the two stay members are arranged in the vehicle width direction, and the distance W0 between the two stay members at the mounting position on the one side and the distance W1 at the mounting position on the other side of the both stay members have a relationship of W0<W1. It is more preferable that W0 and W1 have a relationship of W1>W0*1.2.

In addition, the reinforcement member preferably has a shape that conforms to the shape of the stay member and has a shape that straddles the bend, thereby dispersing the stress concentrated in the bend portion of the stay body. It has the effect of exerting anti-sneaking performance.

Further, the flange portion extends toward the front end side of the one-sided mounting surface at the flange portion outside the front-rear direction in the vehicle direction, and extends toward the base end side of the one-sided mounting surface at the flange portion inside the front-rear direction in the vehicle direction. As a result, the stress concentrated on the bent portion of the stay main body is dispersed, and the performance of preventing diving is exhibited.

Further, if the flange portion is closed with a reinforcement material, excessive deformation of the stay that occurs at the time of collision can be suppressed, and as a result, the effect of preventing diving can be enhanced.
It is most effective to close the entire area of the flange where the reinforcement material is provided, but if it is less than 50%, it is difficult to straddle the bend, etc., and the stay member will be greatly deformed, and as a result, a sufficient diving prevention function can be obtained. I will not be able to.

In addition, an auxiliary member interposed between the side wall surface of the vehicle body and the stay member can be provided, which can improve the mounting strength.

The stay member and the flange portion may be integrally formed, whereby the number of parts is significantly reduced, the welded portion (joint portion) is small, and the strength is not lowered. Further, the flange portion can be formed at the same time, which has the effect of shortening the process.

It is a perspective view which shows the use condition of one Embodiment of this invention. It is a front perspective view (A figure) and a back perspective view (B figure) which shows one of the stay members of this embodiment. Similarly, they are a plan view (A figure), a front view (B figure), and a bottom view (C figure). It is a top view which shows the use condition of this embodiment. It is a figure which shows the outline of the load distribution in this embodiment. It is a perspective view which shows the use condition of other embodiment of this invention. It is a perspective view which shows the use condition of other embodiment of this invention. It is a front perspective view, a rear perspective view, and a top view showing the state of use of further another embodiment of the present invention. It is a graph which shows the time change of the peak load in the Example of this invention. Similarly, it is a graph showing a temporal change of the peak load. It is a figure which shows the outline of the peak load in the conventional attachment structure.

An embodiment of the present invention will be described below.
A stay member used in this embodiment will be described with reference to the drawings.
As shown in FIG. 1, the stay members 10A and 10B are attached and arranged on both sides in the vehicle width direction and have a symmetrical shape. On the rear side of the vehicle, the stay member 10A is located on the left side when viewed from the rear side, and the stay member 10B is located on the right side when viewed from the outside in the vehicle front-rear direction.

As shown in FIGS. 2 and 3, the stay member 10A is provided with a lower flange portion 2A and an upper flange portion 3A at both ends of a stay body plate 1A, and is formed by integral molding.
The stay member 10A and the stay member 10B have a bilaterally symmetrical configuration about the vehicle width center. Hereinafter, the stay member 10A will be mainly described, and the description thereof will be omitted or simplified on the stay member 10B side. Also on the stay member 10B side, a configuration in which the symbol "A" on the stay member 10A side is replaced with "B" to make it symmetrical is shown.
The stay main body 10A has a vehicle main body mounting surface 40A on the upper end side, and is installed substantially vertically at the time of mounting. The vehicle body mounting surface 40A has mounting holes that serve as bolt holes and rivet holes. The stay body 10B also has a vehicle body mounting surface on the side that is the upper end portion, and is installed substantially vertically when mounted.

A side that is below the vehicle body mounting surface 40A in the mounted state has a first corner portion 5A that bends to the left outside. The bending angle of the first corner portion 5A is not particularly limited, but for example, a bending angle of 3 to 25 degrees can be mentioned. The bend may be a bend, or may be a bend to cause a bend. The first corner portion 5A may be provided with a curved region and the tilt angle at a position below the curved region may be adjusted. In the present embodiment, by providing the curved bending region, the inclination angle of the stay main body plate 1A located below the curved region is adjusted to a desired angle (for example, 3 to 25 degrees).
In the stay main body plate 1A, a through hole 20A for positioning in the assembling process is provided on the surface on the lower side of the bending region in the attached state.
The stay member 10B side has the same configuration, although it is symmetrical.

The stay main body plate 1A has a second corner portion 6A that bends inward on the lower side of the area inclined in the attached state. The bend may be a bend, or may be a bend to cause a bend. The second corner portion 6A may be provided with a curved region to adjust the tilt angle at a position below the curved region. In the present embodiment, by providing the curved bending region, the inclination angle of the stay main body plate 1A below that is adjusted so as to be the vertical direction at the time of installation.
The stay member 10B side is also symmetrical, but has the same structure.

The area of the stay main body plate 1A in the vertical direction has an exterior member attachment portion 7A having an exterior member attachment surface 70A on the outside so as to face the vehicle front-rear direction outside. At the exterior member attachment portion 7A, the stay body plate 1A can be joined by welding or the like.
The exterior member attaching portion 7A is attached to the stay main body plate 1A such that the center portions of the lower flange portion 2A and the upper flange portion 3A are located at the center portions thereof.
The stay member 10B side is also symmetric but has the same structure.

The lower flange portion 2A and the upper flange portion 3A described above have outer edge shapes along the first corner portion 5A and the second corner portion 6A of the stay body plate 1A. Therefore, the heights of the first corner portion 5A and the second corner portion 6A are substantially equal over the entire length.
The stay member 10B side is also symmetric but has the same structure.

A hollow reinforcement member 12A having an upper surface wall and a side surface wall is fixed to the inner surface side of the lower flange portion 2A. The side wall of the reinforcement member 12A is located inside the outer edge of the lower flange portion 2A. That is, in the reinforcement member 12A, one end of the side portion is fixed to the outside of the inner 2A surface of the lower flange portion, and the other end of the side portion is fixed to the stay main body plate 1A with a space from the lower flange portion 2A. As a result, the reinforcement member 12A that is closed at least at a part of the lower flange portion 2A has an end portion at a position close to the exterior member attachment portion 7A, and in this embodiment, the second corner portion. It has one end at the 6A end. The other end reaches the vehicle body mounting surface 40A across the first corner 5A.

Further, a reinforcement (not shown) is also formed on the stay member 10B side.
Closure of the lower flange portion suppresses excessive deformation of the stay that occurs at the time of a collision, and as a result, enhances the effect of preventing diving. It is most effective that the reinforcement member is closed over the entire area of the lower flange portion 2A.
The flange on the mounting side of the exterior member has a transition area where the direction is changed from “oblique downward” to “horizontal”. It is difficult to form the reinforcement material in the transition region from the viewpoint of the elongation limit of material properties. For this reason, the reinforcing plate 9A is provided on the exterior member mounting portion side of the lower flange portion 2A. The same applies to the stay member 10B side. One end of the reinforcing plate 9A is fixed to the outside of the inner surface of the lower flange 2A, and the other end of the side is fixed to the stay body plate 1A with a gap from the lower flange 2A. As a result, at least a part of the lower flange portion 2A is closed.
On the mounting side to the vehicle body, it is necessary to reinforce the bent portion where stress is concentrated. However, at the curved portion near the vehicle body, the angle is gentle and it is within the molding range of the material characteristics, and it becomes easy to process and install the reinforcement material.
Considering these factors, the reinforcement material is preferably 50% or more of the entire length of the lower flange portion.
If the length of the reinforcement member is less than 50% of the length of the lower flange portion, it becomes difficult to straddle the bending portion on the vehicle body side, the stay member is largely deformed, and as a result, the diving prevention function deteriorates.

Next, FIG. 4 shows a mounting structure of a vehicle exterior member using the stay members 10A and 10B.
In the stay members 10A and 10B, the vehicle body attachment portions 4A and 4B located on one of the stay members 10A and 10B are arranged such that the lower flange is located on the front side in the vehicle direction and the upper flange part is located on the rear side in the vehicle direction. Is attached to the side rail 100, which is the side wall surface of the vehicle body, with bolts, rivets, etc., via the vehicle body mounting surfaces 40A and 40B.

At this time, the stay member 10A is located on the left side and the stay member 10B is located on the right side when viewed from the outside in the vehicle direction.
In the exterior member attachment portions 7A and 7B located on the other side of the stay members 10A and 10B, the exterior member 110 is attached to the exterior member 110 with bolts or rivets via the exterior member attachment surface facing outward in the vehicle front-rear direction. In this embodiment, the exterior member 110 is a bumper. However, in the present invention, the exterior member is not limited to the bumper.

In the state after mounting, as shown in FIG. 4, the mounting interval between the vehicle body mounting surfaces is W0, and the mounting interval W1 is the center-to-center distance of the exterior member mounting surface on the other side, W0<W1. By setting W0<W1, the distance L between the end portion of the exterior member 110 and the exterior member mounting portions 7A and 7B becomes shorter than in the conventional case, and the load distribution in the exterior member 110 can be changed. It is more desirable that W1>W0×1.2.

FIG. 5 shows an outline of load distribution when a stress is applied in this embodiment. It should be noted that the load distributions P1 and P3 at both ends and the center are the same, and the load P2 is required to be 1.8×P1 to 2.0×P1 at the central portion between P1 and P3. The graph with respect to the load requirement shows the load distribution according to the present embodiment, and the load distribution has a result substantially in accordance with the load requirement.

Further, as shown in FIG. 6, in the vehicle body mounting portions 4A and 4B along the side wall surface, an auxiliary plate serving as an auxiliary portion on the opposite side of the vehicle body mounting portions 4A and 4B so as to sandwich the side wall surface during mounting. 13 may be arranged to increase the mounting strength.

In addition, the said embodiment demonstrated the example which provided the reinforcement plate in the lower flange part. However, in the present invention, the reinforcing plate may not be provided. FIG. 7 shows an example of a stay member not provided with a reinforcing plate, in which the reinforcement member 12A is provided on the lower flange portion 2A and the reinforcing plate is not arranged. The other structures are the same as those in the above-described embodiment, and detailed description thereof will be omitted.

Further, in each of the above-described embodiments, the stay member has been described as having two bending portions, but the stay member may have one bending portion.
FIG. 8 shows a stay member having one bend, and only one stay member is shown.
In this stay member 10A1, a lower flange portion 2A1 and an upper flange portion 3A1 are provided at both ends of the stay body plate 1A1 and are integrally formed.
The stay main body 10A1 has a vehicle main body mounting surface 40A1 on the upper end side.

The side below the vehicle body mounting surface 40A1 in the mounted state has a corner portion 5A1 that bends to the left outside. The bending angle of the corner portion 5A1 is not particularly limited, but for example, a bending angle of 3 to 25 degrees can be mentioned. The bend may be a bend, or may be a bend to cause a bend.
In the stay main body plate 1A, a through hole 20A1 is provided on the lower surface of the bending region in the attached state.

An exterior member attachment portion 7A1 having an exterior member attachment surface 70A1 on the outside is provided on the lower side of the stay body plate 1A1 so as to face the vehicle front-rear direction outside. At the exterior member attaching portion 7A1, the stay body plate 1A can be joined by welding or the like.
The exterior member attaching portion 7A1 is attached to the stay body plate 1A1 such that the center portions of the lower flange portion 2A1 and the upper flange portion 3A1 are located at the center portions thereof.

The lower flange portion 2A1 and the upper flange portion 3A1 described above have outer edge shapes along the corner portion 5A1 of the stay body plate 1A1. Therefore, the height of the corner portion 5A1 is substantially uniform over the entire length.

Further, a hollow reinforcement member 12A1 having an upper surface wall and a side surface wall is fixed to the inner surface side of the lower flange portion 2A1. The side wall of the reinforcement member 12A1 is located inside the outer edge of the lower flange portion 2A.
One end of the reinforcement member 12A1 is fixed to the outside of the inner surface of the lower flange portion 2A1 and the other end of the side member is fixed to the stay body plate 1A1 at a distance from the lower flange portion 2A1. Thus, the reinforcement member 12A1 that is closed at least at a part of the lower flange portion 2A1 has an end portion at a position close to the exterior member mounting portion 7A1, and in this embodiment, the second corner portion. It has one end at the end of 6A1. The other end reaches the vehicle body mounting surface 40A1 across the corner 5A1.

A reinforcing plate 9A1 is provided on the exterior member mounting portion side of the lower flange portion 2A1. One end of the reinforcing plate 9A1 is fixed to the outside of the surface of the lower flange 2A1 and the other end of the side is fixed to the lower flange member 2A1 with a space from the lower flange 2A1. As a result, at least part of the lower flange portion 2A1 is closed. In addition, also in this embodiment, the reinforcing plate 9A1 may not be provided.

Next, using the mounting structure according to the present embodiment, the mounting structure having no reinforcement, and the mounting structure using the conventional stay member having no bending, a stress load test (applied to the end of the exterior member is performed. The load (P1 load) was simulated. The results are shown in FIGS.
In the test with and without the reinforcement, the sample without the reinforcement had a peak load of 61.8 kN, and the sample with the reinforcement had a peak load of 87.5 kN. Therefore, the effect of the reinforcement was remarkable.
On the other hand, a test was performed depending on whether or not the stay member was bent. In this test (analysis), all had a reinforcement. As a result, the peak load was 54.5 kN for the test material using the stay member having no bending, whereas the peak load was 66.5 kN for the test material having bending. Yes, an increase in peak load was observed.
When the passenger car collides with both ends of the exterior member, the effect of reducing the distance between the action point acting on the exterior component and the reaction point acting on the stay member reduces the moment applied to the outside of the exterior member contact portion of the stay member. As a result, it was confirmed that the diving prevention performance was improved.

Although the present invention has been described above based on the above-described embodiments and examples, the present invention is not limited to the contents of the above-described embodiments and may be appropriately modified with respect to the embodiments without departing from the scope of the present invention. Can be changed.

1A Stay body plate 2A Lower flange portion 3A Upper flange portion 4A Vehicle body mounting portion 40A Vehicle body mounting surface 5A First corner portion 6A Second corner portion 7A Exterior member mounting portion 70A Exterior member mounting surface 9A Reinforcing plate 10A, 10B Stay member 12A Reinforcement material 13 Auxiliary plate 100 Side rail

Claims (11)

One of the side walls of the side rail of the vehicle body is provided with a stay member, one side of which is fixed and extends downward, bends outward at least once in the vehicle width direction, and has an exterior member attached to the other side. Then
The stay member is provided at both ends in the vehicle front-rear direction with flange portions that extend at least outward in the vehicle width direction, and among the flange portions, at least a flange portion on the front side in the vehicle front-rear direction is provided along the flange surface. Force material is provided,
The reinforcement member has a side portion one end side fixed to the flange portion, and a side portion other end side spaced from the flange portion so that the stay member is closer to the flange portion than the other flange portion. A mounting structure for a vehicle exterior member, wherein the mounting structure is fixed and at least a part of the flange portion is closed. Wherein the stay member, on the other side, along the vehicle width direction, having an exterior member mounting surface that extends beyond the width of the stay member body on both sides, a package member toward the vehicle front-rear direction of the rear side The mounting structure for a vehicle exterior member according to claim 1, wherein the mounting portion is provided. The mounting structure for a vehicle exterior member according to claim 2, wherein a reinforcing plate is provided on the stay member on the side of the attachment portion for the exterior member. One end of the side portion of the reinforcing plate is fixed to the inner surface of the flange portion, the other end of the side portion is fixed to the stay member at a distance from the flange portion, and a part of the flange portion is closed. The mounting structure for a vehicle exterior member according to claim 3, wherein: When the two stay members are arranged in the vehicle width direction, the distance W0 between the two stay members at the mounting position on the one side and the distance W1 at the other position between the stay members have a relationship of W0<W1. The mounting structure for a vehicle exterior member according to any one of claims 1 to 4, further comprising: The mounting structure for a vehicle exterior member according to claim 1, wherein the flange portion has a shape that follows the bending of the stay member. The said reinforcement material has the shape which followed the shape of the said stay member, and has the shape which straddled at least 1 bending of the said stay member, The any one of Claim 1-6 characterized by the above-mentioned. The vehicle exterior member mounting structure. The said flange part is provided at least between the mounting surface of the said one side, and the mounting surface of the said other side, The vehicle exterior member of any one of Claims 1-7 characterized by the above-mentioned. Mounting structure. Said flange portion, said one extending to the mounting surface leading end side of the side in the flange portion in the vehicle longitudinal direction rear side, the one extends to the mounting surface the base end side of the side at the flange portion of the vehicle both front-rear direction front side The mounting structure for a vehicle exterior member according to any one of claims 1 to 8, wherein: The vehicle exterior according to any one of claims 1 to 9, wherein the reinforcement member has a length of 50% or more with respect to the entire length of the flange portion provided with the reinforcement member. Member mounting structure. Mounting structure of a vehicle exterior member according to any one of claims 1 to 10, characterized in that it is integrally formed with said stay member and the flange portion.

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