JP6942010B2 - Mounting structure of vehicle exterior members - Google Patents

Description

The present invention relates to a mounting structure of a vehicle exterior member for mounting the exterior member to the vehicle body.

A vehicle with a high vehicle height such as a truck is provided with an exterior member for the vehicle at a lower position of the vehicle in order to prevent a vehicle having a low vehicle height from slipping in when a vehicle collides with the vehicle. The vehicle exterior member is attached by a stay member or the like connected to the side rail in the vehicle body.
By the way, it is desirable that a desired load distribution is generated when stress is applied to the exterior member due to collision or the like, and it is necessary to consider optimization of the design from the balance between each weight and the dive performance. That is, according to Article 18-2 of the safety standard for road transport vehicles and the technical standard for the intrusion prevention device, the load is small on both outer sides and the central part of the exterior member, and the load is slightly outside the central part. It is preferable to increase the size, and some countries have standardized it as a vehicle standard.

The load distribution is shown in FIG.
In FIG. 9, one end of the stay member 130 arranged on the extension surface of the side wall is attached downward to the 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 stress is applied from the exterior member side due to collision or the like, a state close to a suitable load distribution can be obtained based on the strength design of the material or the like. However, if a suitable load distribution is made in the central portion and in the vicinity of the outer side thereof, the load on both ends of the exterior member becomes insufficient. On the other hand, in order to design so as to satisfy the P1 load which is the weakest part in terms of strength, it is necessary to thicken the entire stay member, and in that case, the load becomes large in the central part and the vicinity of the outer side thereof, which is excessive. It is in the state of specifications and is not suitable from the viewpoint of optimum design.

In Patent Document 1, which is a prior art, an exterior member is supported by a support member corresponding to a stay member, and the support member is attached to a first mounting portion joined to the vehicle body frame and below the first mounting portion. It has a second mounting part that is positioned and attached to the exterior member, and an intermediate part that is located between these first mounting part and the second mounting part, and the second mounting part is attached to the first mounting part. It has been proposed that the intermediate portion is bent outward in the vehicle width direction so as to extend diagonally 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 material and a rectangular plate material integrally extending from the lower side edge of the rectangular plate material, and the rectangular plate material is bent at a right angle. It is composed of a vertically long rectangular stay plate formed and a mounting piece that extends outward in the vehicle width direction from the stay plate and supports the protector body. Mounting holes for fixing with rivets are 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 that the stay plate and the stay plate have a horizontal cross section T-shape, and the support plate is provided between the mounting piece and the support plate along the stay plate. It is provided so as to extend horizontally and is provided with upper and lower ribs for connecting the mounting piece and the support plate.

Japanese Unexamined Patent Publication No. 2006-08905 Japanese Unexamined Patent Publication No. 2008-062838

However, it is difficult to distribute the load in a well-balanced manner or so as not to have excessive specifications even by devising the conventional technology, and stress is applied to the collision side due to an improper load distribution, so that the appropriate standard cannot be satisfied. There's a problem.

Furthermore, transport trucks are broadly classified into "large", "medium", "small", etc., based on differences in displacement, body weight, and the like. There are several types of side rails, which are the skeleton, with different lengths, widths, and heights, and the suspensions and tires are also different. In addition to the above reasons, the mounting positions of the exterior parts vary depending on the vehicle type due to the arrangement relationship with the safety and security parts (license plate, protector, display, reflector, etc.). According to the safety standards, the ground clearance of the lower end of the bumper (exterior parts) is set, and the lower limit is set by each vehicle manufacturer's design in consideration of the vehicle body inclination and road shape during driving, and within that area. Can be changed with.
Along with this, various types of stay manufacturing molds must be prepared, which is inefficient in terms of setup change time, cost, and mold storage. It is also necessary to minimize the number of stay manufacturing molds and reduce the man-hours for switching and setup during manufacturing.

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

Among the mounting structures of the exterior members for vehicles of the present invention, the first embodiment is fixed to the side wall surfaces on both sides of the vehicle body in the vehicle width direction, extends downward and rearward in the vehicle front-rear direction, and bends outward in the vehicle width direction. A stay member having at least one bent portion and attached to an exterior member on the other end side is provided.
The stay member extends downward so that the lower side inclines outward in the vehicle width direction from the upper side, and the other end side is attached to the vertical surface of the exterior member, and the attachment position on the upper side with respect to the exterior member. Is located inside the vehicle width direction from the mounting position on the lower side,
The stay member is provided with flanges extending at least outward at both ends in the width direction.
Reinforcing plates extending over the flanges on both sides are provided at the tip of the stay member on the mounting side with respect to the exterior member.
The reinforcing plate has a reinforcing plate surface wall facing the stay plate surface between the flange portions of the stay member, a reinforcing plate surface wall, and at least one side wall connected to the flange portion, and reaches the reinforcing plate surface wall and both flange portions. distance you characterized in that the upper side is positioned so as reinforcing plate wall is along the vertical direction in the mounted state of the outer member so as to be larger than the lower side.

As for the mounting structure of the exterior member for a vehicle of another form, in the present invention of the above-described embodiment, the stay member has a downward direction between a bent portion near the mounting side of the exterior member and the tip of the mounting side of the exterior member, and the front and rear of the vehicle. It extends linearly backward in the direction, and is characterized in that the length of the portion extending linearly is set according to the type of vehicle to be mounted.

In the present invention of the present invention, the mounting structure of the exterior member for a vehicle of another form is such that the reinforcing plate and the flange portion are formed by the side wall on the upper side where the distance between the reinforcing plate surface wall and each flange portion is large. It is characterized by fixing.

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

Another form of the mounting structure of the vehicle exterior member is characterized in that, in the present invention of the above-described embodiment, the flange portion has a shape that conforms to the shape of the stay member.

Another form of the mounting structure of the vehicle exterior member is characterized in that, in the present invention of the above-described embodiment, at least the flange portion on the front side in the vehicle front-rear direction is provided with a reinforcement material along the longitudinal direction of the flange. ..

As for the mounting structure of the exterior member for a vehicle of another form, in the present invention of the above-described embodiment, the reinforcement material has a shape along the shape of the stay member and straddles at least one bend of the stay member. It is characterized by having a shape.

As for the mounting structure of the exterior member for a vehicle of another form, in the present invention of the above-described embodiment, the reinforcement material has one end side fixed to the flange portion and the other end side of the side portion spaced from the flange portion. It is characterized in that it is fixed to the stay member and at least a part of the flange portion is closed.

In the present invention of the present invention of the present invention of the present invention of the present invention of the other form, the reinforcement material has a length of 50% or more with respect to the total length of the flange portion provided with the reinforcement material. It is characterized by.

Another form of the mounting structure of the vehicle exterior member is characterized in that, in the present invention of the above-described embodiment, the stay member and the flange portion are integrally molded.

According to the present invention, it is possible to obtain an appropriate load distribution according to an appropriate distribution at the time of a collision, and the bending moment M acting directly on the stay at the most disadvantageous bumper end load (P1 point) is obtained. It can be made smaller, the load peak is improved, it meets the safety standards, and the effect of preventing sneaking is well-balanced over the entire width direction of the vehicle.

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

Further, the reinforcing plate has a reinforcing plate surface wall facing the stay plate surface between the flange portions of the stay member, a reinforcing plate surface wall, and at least one side wall connected to the flange portion, and is formed on the reinforcing plate surface wall and both flange portions. Since the reinforcing plate surface wall is located along the vertical direction in the state of being attached to the exterior member so that the distances reached are different from each other, it is easy to position the support line having a large influence on the P1 load to the outside, and the load distribution can be adjusted. Can be made more appropriate. There is also a method of extending the upper flange, which has to increase the plate thickness in order to make the reinforcing plate surface wall run vertically, but it is not suitable because the weight increases due to excessive specifications. According to the present invention, it is possible to reduce the increase in the surplus thickness of the flange portion on the upper side and suppress the increase in the weight of the mounting structure.

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

Further, in the form of providing the reinforcement material, the effect of suppressing the torsional deformation acting on the stay member is also brought about. Further, it is desirable that the reinforcement material has a shape that follows the shape of the stay member and has a shape that straddles the bend, whereby the stress concentrated on the bend of the stay body is dispersed and slips in. It has the effect of demonstrating prevention performance.

Further, the flange portion extends toward the tip end side of the mounting surface on one side of the flange portion on the outer side in the front-rear direction in the vehicle direction, and extends toward the base end side of the mounting surface on the one side at the flange portion on the inner side in the front-rear direction in the vehicle direction. As a result, the stress concentrated on the bent portion of the stay body is dispersed and the dive prevention performance 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 is suppressed, and as a result, the effect of preventing sneaking is enhanced.
In the flange part where the reinforcement material is provided, it is most effective to close the mouth in the entire area, but if it is less than 50%, it is difficult to straddle the bent part, etc., and the stay member is greatly deformed, resulting in a sufficient sneaking prevention function. I can't do it.

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

It is a perspective view which shows the use state of one Embodiment of this invention. It is a side view which shows one of the stay members of this embodiment. Similarly, it is a front view. It is a rear view which shows the mounting state of this embodiment. It is a figure which shows the concept of the load distribution in this embodiment. It is a figure which shows the difference of structure of the example of this invention and the comparative example in the Example of this invention. It is a figure which shows the analysis result of the strain distribution in an Example. It is a figure which shows the analysis result of the stress distribution in an Example. It is a figure which shows the outline of the peak load in the conventional mounting structure.

An embodiment of the present invention will be described below.
The 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. The stay member 10A is located on the left side when viewed from the rear side of the vehicle, and the stay member 10B is located on the right side.

The stay member 10A is provided with a lower flange portion 2A and an upper flange portion 3A at both ends of the stay body plate 1A, and is formed by integral molding. It should be noted that the present invention does not have to be integrally molded, and the lower flange portion 2A and the upper flange portion 3A may be fixed to the stay main body plate 1A by welding or the like.
The stay member 10A and the stay member 10B have a symmetrical structure with respect to the center of the vehicle width. Hereinafter, the stay member 10A will be mainly described, and the description will be omitted or simplified on the stay member 10B side. Also on the stay member 10B side, a symmetrical configuration is shown by replacing the code "A" on the stay member 10A side with "B".

The stay member 10A has a vehicle body mounting surface 40A on the upper end side, and is installed substantially perpendicular to the side surface of the side rail 100 at the time of mounting. The vehicle body mounting surface 40A has mounting holes that serve as bolt holes and rivet holes. The stay member 10B also has a vehicle body mounting surface on the side that becomes the upper end portion, and is installed substantially vertically at the time of mounting.

The side below the vehicle body mounting surface 40A in the mounted state has a first corner portion 5A that bends to the left outer side. The bending angle of the first corner portion 5A is not particularly limited, and examples thereof include a bending angle of 3 to 25 degrees. The bend may be one that bends or one that bends to cause a bend. In the first corner portion 5A, a bending region may be provided and the inclination angle at a position below the bending region may be adjusted. In the present embodiment, by providing a curved bending region, the inclination angle of the stay body plate 1A below the curved region is adjusted to a desired angle (for example, 3 to 25 degrees). Although the stay member 10B side is symmetrical, it has the same configuration. The first corner portion 5A corresponds to the curved portion of the present invention.

The stay body plate 1A extends linearly on the lower side of the first corner portion 5A. Although a plurality of bent portions may be provided in the present invention, they extend linearly on the lower side of the bent portion located at the lowermost position and are attached to the exterior member 110 on the lower side. By extending the stay member linearly toward the mounting side, it is possible to respond to different vehicles simply by changing the length of this part, and the number of stay manufacturing types can be minimized. , Switching during production and setup man-hours can be reduced. The stay member 10B side is also symmetrical and has the same configuration.

On the lower side of the stay body plate 1A, there is an exterior member mounting portion 7A having an exterior member mounting surface 70A on the outside. In the exterior member mounting portion 7A, the stay body plate 1A can be joined by welding or the like.
The exterior member mounting portion 7A is mounted on the stay body plate 1A so that the lower flange portion 2A and the upper flange portion 3A are located inside the exterior member mounting portion 7A. The stay member 10B side is also symmetrical and has the same configuration.
The exterior member mounting portion 7A is attached to the exterior member 110 by bolts, rivets, or the like via the exterior member mounting surface facing outward in the front-rear direction of the vehicle. In this embodiment, the exterior member 110 is a bumper. However, in the present invention, the exterior member is not limited to the bumper.

The lower flange portion 2A and the upper flange portion 3A have an outer edge shape along the first corner portion 5A of the stay body plate 1A. The stay member 10B side is also symmetrical but has the same configuration.
Further, a hollow reinforcement material 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 material 12A is located inside the outer edge of the lower flange portion 2A. That is, in the reinforcement material 12A, one end side of the side portion is fixed to the outside of the inner surface of the lower flange portion 2A, and the other end side of the side portion is fixed to the stay main body plate 1A at a distance from the lower flange portion 2A. As a result, the reinforcement material 12A whose opening is closed at least part of the lower flange portion 2A has an end portion close to the exterior member mounting portion 7A. The other end reaches the vehicle body mounting surface 40A.

Further, a reinforcement (not shown) is similarly formed on the stay member 10B side. Closing the lower flange suppresses excessive deformation of the stay that occurs at the time of collision, and as a result enhances the effect of preventing sneaking. It is most effective to close the reinforcement material over the entire area of the lower flange portion 2A.
In consideration of these factors, the reinforcement material is preferably 50% or more of the total length of the lower flange portion.
If the length of the reinforcement material is less than 50% of the length of the lower flange portion, it becomes difficult to straddle the bent portion on the vehicle body side, the stay member is greatly deformed, and as a result, the dive prevention function is deteriorated.
The flange on the mounting side of the exterior member 110 has a transition region in which the direction changes from "diagonally downward" to "horizontal". It is difficult to form a reinforcement material in the transition region from the viewpoint of the elongation limit of material properties.
Therefore, a 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.

The reinforcing plate 9A has a reinforcing plate surface 90A, and one end side of the side portion is fixed to the inner surface outer side of the lower flange portion 2A so that the reinforcing plate surface 90A faces the plate surface of the stay main body plate 1A, and the other side. A side wall 91A is provided at one end of the portion and is fixed to the inner surface of the upper flange portion 3A by the side wall 91A. Due to the above structure, the reinforcing plate surface 90A has a different distance from the lower flange portion 2A and the upper flange portion 3A, and by increasing the distance on the upper flange portion 3A side, the reinforcing plate surface 90A becomes the exterior member mounting portion 7A. It is installed vertically. In this embodiment, the lower flange portion 2A and the upper flange portion 3A can have the same width.
When the stay body plate 1A is extended downward by the stay member 10A, when the stay body plate 1A is fixed to the vertical surface of the exterior member 110, the upper side and the lower side of the stay body plate 1A are displaced in the horizontal direction, and the upper side is the vehicle width. Located inward in the direction. This misalignment is corrected by the length of the side wall of the reinforcing plate 9A.
In this embodiment, the side walls are provided only on one side of the reinforcing plate surface 90A, but side walls may be provided on both sides of the reinforcing plate surface 90A and fixed to the flange portion on each side wall. In that case, the width of the side wall is changed so that the distance between both sides of the reinforcing plate surface and each flange portion is different so that the reinforcing plate surface is located along the vertical direction.

In order to correct the position of the reinforcing plate surface by making the distance between both sides of the reinforcing plate surface 90A and each flange portion different depending on the side wall so that the reinforcing plate surface is positioned along the vertical direction, the upper part is used. It is not necessary to provide an extra margin on the flange portion 3A, and the surplus can be eliminated or the amount of the surplus can be reduced. For example, even when a mounting structure is adopted for a different vehicle, the stay member is linear. In addition to adjusting the length of the part that extends to, it is sufficient to prepare reinforcing plates with different shapes (the length of the side wall is different) according to the position of the flange part in the mounting part, which is excellent in versatility. .. Further, the support line of the stay member becomes vertical to the exterior member 110 by the reinforcing plate, and the support line having a large influence on the P1 load can be positioned outward.

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 distance between the centers of the exterior member mounting surfaces on the other side, and W0 <W1. When 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 before, 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 the load distribution under stress load in the present embodiment. It is required that the load distributions P1 and P3 at both ends and the center are equivalent, and the load P2 is 1.8 × P1 to 2.0 × P1 at the central portion between P1 and P3. The graph for the load requirement shows the load distribution according to the present embodiment, and the results obtained that the load distribution is almost in line with the load requirement.

Next, as shown in FIG. 6, the mounting structure (FIG. A) of the example of the present invention in which the reinforcing plate surface wall is located along the vertical direction in the mounted state and the reinforcing plate surface wall are inclined along the inclination of the stay. In the mounting structure (Fig. B) of the comparative example, the strain distribution and the stress distribution when a load was applied to the bumper were analyzed. Altair Engineering Co., Ltd. Hyper-Mesh and Hyper-View were used as the analysis prepost, and JSOL Impact and Structural Analysis Software LS-DYNA-R 7.0.0 Co., Ltd. was used as the analysis program.
In the example of the present invention and the comparative example, only the shape of the auxiliary plate and the shape of the upper flange of the stay body were changed, and the reinforcement was deleted. Other conditions are the same for both. The analysis results are shown in FIGS. 7 and 8.
From the result of load-displacement, the dive prevention function was improved (about 3.0%) when the support line was extended outward or verticalized. Furthermore, as shown in Fig. 6C, there is also a method of extending the upper flange, which has to increase the plate thickness in order to make the reinforcing plate surface wall run vertically, but it is suitable because it is excessive specifications and the weight increases. No.
According to the present invention, it is possible to reduce the increase in the surplus thickness of the flange portion on the upper side and suppress the increase in the weight of the mounting structure.

Further, when the stress distribution was analyzed, in the comparative example, the load on the stay was small and the load on the bumper was large. On the other hand, in the example of the present invention, as the stay load increases, the stress distribution tends to be uniform, and the load balance is improved. The burden on the bumper is shifting to the load side.

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 is appropriate for the embodiments as long as it does not deviate from the scope of the present invention. Can be changed.

1A Stay body plate 2A Lower flange part 3A Upper flange part 40A Vehicle body mounting surface 5A First corner 7A Exterior member mounting part 70A Exterior member mounting surface 9A Reinforcing plate 90A Reinforcing plate surface 91A Side wall 10A, 10B Stay member 12A Reinforce material 100 side rails

Claims (10)

It is fixed to the side wall surfaces on both sides of the vehicle body in the vehicle width direction, has at least one bent portion that extends downward and rearward in the vehicle front-rear direction and bends outward in the vehicle width direction, and is attached to the exterior member on the other end side. Equipped with stay members
The stay member extends downward so that the lower side inclines outward in the vehicle width direction from the upper side, and the other end side is attached to the vertical surface of the exterior member, and the attachment position on the upper side with respect to the exterior member. Is located inside the vehicle width direction from the mounting position on the lower side,
The stay member is provided with flanges extending at least outward at both ends in the width direction.
Reinforcing plates extending over the flanges on both sides are provided at the tip of the stay member on the mounting side with respect to the exterior member.
The reinforcing plate has a reinforcing plate surface wall facing the stay plate surface between the flange portions of the stay member, a reinforcing plate surface wall, and at least one side wall connected to the flange portion, and reaches the reinforcing plate surface wall and both flange portions. A mounting structure for an exterior member for a vehicle, characterized in that the reinforcing plate surface wall is positioned along the vertical direction in a state of being mounted on the exterior member so that the distance is larger on the upper side than on the lower side. The stay member extends linearly downward and rearward in the front-rear direction of the vehicle between the bent portion near the mounting side of the exterior member and the tip of the mounting side of the exterior member, and is suitable for the type of vehicle to be mounted. The mounting structure for an exterior member for a vehicle according to claim 1, wherein the length of a portion that extends linearly is set accordingly. The vehicle exterior member according to claim 1 or 2, wherein the reinforcing plate and the flange portion are fixed by the side wall on the upper side where the distance between the reinforcing plate surface wall and each flange portion is large. Mounting structure. Two stay members are arranged in the vehicle width direction, and the distance W0 at the mounting position on one side of both stay members and the distance W1 at the mounting position on the other side of both stay members have a relationship of W0 <W1. The mounting structure for an exterior member for a vehicle according to any one of claims 1 to 3. The mounting structure for an exterior member for a vehicle according to any one of claims 1 to 4, wherein the flange portion has a shape that conforms to the shape of the stay member. The mounting structure for an exterior member for a vehicle according to any one of claims 1 to 5, wherein at least the flange portion on the front side in the front-rear direction of the vehicle is provided with a reinforcement material along the longitudinal direction of the flange. .. The mounting structure for an exterior member for a vehicle according to claim 6, wherein the reinforcement material has a shape that follows the shape of the stay member and has a shape that straddles at least one bend of the stay member. .. In the reinforcement material, one end side of the side portion is fixed to the flange portion, the other end side of the side portion is fixed to the stay member at a distance from the flange portion, and at least a part of the flange portion is closed. The mounting structure for an exterior member for a vehicle according to claim 6 or 7, wherein the outer member is attached. The vehicle exterior according to any one of claims 6 to 8, wherein the reinforcement material has a length of 50% or more with respect to the total length of the flange portion provided with the reinforcement material. Member mounting structure. The mounting structure for an exterior member for a vehicle according to any one of claims 1 to 9, wherein the stay member and the flange portion are integrally molded.

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