JP3937617B2 - Collision safety structure of bumper mounting part in body car with frame - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a bumper mounting portion in a body car with a frame that attaches a bumper to the body side of the body car with a frame to improve the appearance beauty and absorb the impact force to prevent damage to the body and equipment attached to the body. Relates to the collision safety structure.
[0002]
[Prior art]
In the case of body vehicles with a frame, the front end panel of the body is often relatively low-rigidity, so the bumper to which impact force is applied directly in low-speed collisions etc. is fixed to the highly rigid chassis frame without fixing it to the front end panel side What is used is generally adopted. FIG. 9 shows an example. That is, the front bumper bracket 24 is installed between the chassis frame 25 on which the front end panel 19 and the like are mounted and the bumper reinforcement 13a of the bumper 23, and is fixed to both. As a result, the bumper 23 is stably supported, but a large gap is generated between the bumper 23 and the front end panel 19. Of course, the gap can be adjusted to some extent by providing a long hole in the mounting portion of the front bumper bracket 24, but the gap cannot be eliminated. In other words, the body is mounted on the chassis frame via a rubber, and the rubber bends during traveling, so that if there is no gap between the body side and the chassis frame side, they interfere with each other. Therefore, it is necessary to form a gap between the bumper side and the body side.
[0003]
[Problems to be solved by the invention]
If there is a gap between the bumper side and the body side, the appearance will be poor, and an image as a low-end car will easily occur. Therefore, conventionally, in order to eliminate the gap, an attachment structure for fixing the bumper reinforcement of the bumper to the front end panel of the body has been adopted. Therefore, it is necessary to reinforce the low-rigidity front end panel to make it highly rigid. However, in order to make the front end panel highly rigid, it is necessary to attach a reinforcing member or the like, resulting in high weight and high cost. Further, when the front end panel is made to have high rigidity, a large impact force acts on the front end panel, and there is a problem that the front end panel and the devices attached thereto are damaged.
[0004]
As one means for solving the above problems, means for forming a low-rigidity portion in the bumper attachment portion is employed. One known technique is Japanese Utility Model Laid-Open No. 56-111046. This "energy absorbing device" connects a bumper and a vehicle body via an energy absorbing member, and has a feature in a deformation promoting portion of the energy absorbing member.
[0005]
The above-mentioned known technology itself has an impact energy absorbing effect, but this technology has a higher rigidity than that applied to a body vehicle with a frame, for example, a bumper mounting structure for mounting a bumper on the chassis frame side. This is different from the case of the present invention.
[0006]
The present invention was devised in view of the above circumstances, and a bumper is attached to the body of a body car with a frame to improve the appearance beauty and absorb the impact energy from the bumper as much as possible. An object of the present invention is to provide a collision safety structure for a bumper mounting portion in a body vehicle with a frame that reduces the amount of deformation and prevents deformation of the bumper due to a force acting on the bumper from above.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a front end upper panel, a front end lower panel, and a deflector integrally constructed between the front end lower panel and the front end lower panel of a body vehicle with a frame. A bumper mounting safety structure that is interposed between a front end panel composed of a panel or the like and a bumper reinforcement that holds a bumper, and for ensuring safety on the body side at the time of a collision, The collision safety structure includes an upper bumper tee constructed between the deflector panel and the bumper reinforcement, a lower bumper tee constructed between the front end lower panel and the bumper reinforcement, and the front end lower panel. Between the side surface of the bumper reinforcement and the edge of the bumper reinforcement And a damper reinforcement side constitutes a collision safety structure of the bumper mounting portion at an appropriate frame with the body vehicle to form a clearance between the bumper and the bumper reinforcement side and the front end panel. In addition, the lower bumpasty is formed with higher rigidity than the upper bumpy tea. More specifically, the lower and upper bumpers are made of a material having the same thickness, the upper and lower bumpers are made of a general steel plate, and the lower and lower bumpers are higher in strength than the upper and lower bumpers. The lower and upper bumpers are made of a material having the same thickness, and the lower and lower bumpers are provided with reinforcing flanges. Is formed of the same material with a plate thickness thicker than that of the upper bumper tee, and a through hole is formed at a substantially intermediate position on the upper bumper tee and the bumper reinforcement side. . Further, the appropriate clearance is a small clearance that does not impair the appearance beauty.
[0008]
The bumper reinforcement holding the bumper and the front bumper reinforcement are installed between the upper bumper tee, the lower bumper tee and the bumper reinforcement side, and the appearance is not impaired between the bumper, bumper reinforcement and the front end panel. An appropriate small clearance is formed. This prevents an impact force from acting directly from the bumper side to the body side during a low-speed collision. Also, the deflector panel where the upper bumper tee is connected to the upper end of the front end panel is relatively low in rigidity, so the deflector panel is deformed via the upper bumper tee when an impact force is applied in the front-rear direction and absorbs the impact energy as appropriate. can do. Moreover, the impact energy absorption efficiency can be further improved by making the strength of the upper bumper tee lower than that of the lower bumper tee. Further, by making the lower side bumper tea stronger than the upper side bumper tea, the deformation of the bumper tea is reduced with respect to the acting force from the upper side of the bumper, so that the bumper is not deformed due to flooding.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a collision safety structure for a bumper mounting portion in a body vehicle with a frame according to the present invention will be described below in detail with reference to the drawings. FIG. 1 shows the structure of a front end panel 19 of a body of a body car with a frame, a bumper reinforcement 13 attached to the front end panel 19 and an attachment portion thereof. First, the front end panel 19 includes a front end upper panel 20, a front end lower panel 21, and a deflector panel 22, etc., which is installed between them and has a lower rigidity than the front end lower panel 21. The mounting seat 5 is fixed to the front side of the deflector panel 22, the bumper mounting side bracket 14 is fixed to the side end of the deflector panel 22, and the mounting seat 4 is fixed to the bumper mounting side bracket 14. A mounting seat 6 is fixed to the front end lower panel 21. The parts of the mounting seat 5, the mounting seat 6, and the bumper mounting side bracket 14 are reinforced by a reinforcing structure (not shown).
[0010]
The bumper reinforcement 13 to which the bumper not shown is fixed has a substantially U-shaped cross section as shown in FIGS. 1 and 2, and the bumper reinforcement side 18 is provided on both sides of the bumper reinforcement 13. Concatenated as part of it. An end edge 3 is formed at the end of the bumper reinforcement side 18, and an attachment hole 15 that engages with the attachment seat 4 of the bumper attachment side bracket 14 is formed in the end edge 3.
[0011]
On the upper side of the bumper reinforcement 13, the upper side bumper tee 1 is fixed, and on the lower side, the lower side bumper tee 2 is fixed. These are all formed so as to project to the front end panel 19 side. The upper-side bumper tea 1 has an integral structure including a heel part 11 fixed to the bumper reinforcement 13, a foot part 7 that abuts the mounting seat 5 of the deflector panel 22, and a connecting part 9 that connects the heel part 11 and the foot part 7. It consists of a bent one. On the other hand, the lower bumpasty 2 includes a heel part 12 fixed to the bumper reinforcement 13, a foot part 8 that abuts the mounting seat 6 of the front end lower panel 21, and a connecting part 10 that connects the heel part 12 and the foot part 8. It is formed by bending into an integral structure. The base end side of the bumper reinforcement side 18 is fixed to the side end of the bumper reinforcement 13, and the edge 3 of the protruding end is fixed to the mounting seat 4 of the bumper mounting side bracket 14 through the mounting hole 15. The A through hole 17 is formed at a substantially intermediate position of the bumper reinforcement side 18.
[0012]
A method of attaching the bumper reinforcement 13 having the above structure to the front end panel 19 side will be described. The foot 7 of the upper bumpasty 1 and the foot 8 of the lower bumpasty 2 are brought into contact with the mounting seat 5 and the mounting seat 6 on the front end panel 19 side, respectively, and the edge 3 of the bumper reinforcement side 18 is used for bumper mounting. The side bracket 14 is brought into contact with the mounting seat 4. The bumper reinforcement 13 is connected to the front end panel 19 side by fixing the foot 7 and the mounting holes 7a, 8a of the foot 8 and the mounting holes 15 of the end edge 3 with bolts or the like. It should be noted that the clearance between the bumper reinforcement 13 and the front end panel 19 can be maintained at an appropriate dimension by adjusting the overhanging length of the upper bumpasty 1 and the lower bumpasty 2. The upper and lower bumpy ties 1 and 2 may have the same strength. However, as will be described in detail later in the present invention, the lower and lower bumpy pills 2 are formed with higher strength than the upper and lower bumpy ties 1.
[0013]
Next, the impact energy absorbing action in the collision safety structure of the bumper mounting portion in the body vehicle with a frame in the present embodiment will be described. The impact force that acts on the bumper in a low-speed collision or the like is transmitted to the front end panel 19 side via the upper bumpasty 1, the lower bumpasty 2, and the like. In this case, the upper side bumper tea 1 has low rigidity, and the deflector panel 22 also has low rigidity. Therefore, when an impact force is applied, the upper bumpasty 1 and a part of the deflector panel 22 that is a support portion thereof are deformed, and the impact energy is largely absorbed. Of course, the lower bumpasty 2 can also absorb impact energy. Further, the bumper reinforcement side 18 is also formed with a low rigidity by the long through hole 17 and the through hole 17 is formed in the vertical direction as shown in the figure, so that it is easily deformed by an impact force applied to the bumper reinforcement 13. Absorbs impact energy greatly. As a result, damage on the body side can be reduced.
[0014]
As described above, the lower reinforcement 2 is formed with higher strength than the upper reinforcement 1. As described above, this is to effectively absorb the impact energy when the impact force acts in the front-rear direction, but to fulfill the following purpose. That is, a person may get on the bumper 23 to clean or repair the car. In this case, if the vertical rigidity around the bumper 23 is low, the bumper 23 is likely to change downward. Therefore, the lower side bumper tea 2 is strengthened to support the force applied to the bumper 23 from above, and the bumper 23 is prevented from being deformed downward. In the following, several embodiments for giving a difference in strength between the upper side bumper sty 1 and the lower side bumpy stipple 2 will be described with reference to FIGS.
[0015]
In FIG. 3, the upper bumpasty 1 a and the lower bumpasty 2 a are made of the same thickness. In this case, the upper-side bumper tea 1a is formed from a general steel plate, while the lower-side bumper tea 2a is formed from a high-tensile steel plate. There are various types of high-strength steel plates. For example, steel plates having a strength two to three times that of general steel plates are used. As described above, even if the plate thickness is the same, the lower bumpasty 2a has high strength, and the above-described purpose can be achieved.
[0016]
The upper and lower bumpers 1b and 2b in FIG. 4 are made of the same thickness and material. In this case, the lower and lower bumpers 2b are provided with reinforcing flanges 26 as shown in FIGS. It is provided at the edge. By providing the reinforcing flange 26, the lower bumpasty 2b has high strength.
[0017]
In FIG. 6, the upper and lower bumpy tees 1 c and 2 c are made of the same material, but the plate thickness of the lower and lower bumpy tee 2 c is formed to be considerably thicker than that of the upper and lower bumpy tee 1 c. As a result, the lower side bumper tea 2c can be made strong.
[0018]
7 basically has the same structure as that shown in FIG. 6, but as shown in FIG. 8, a through hole 16 is formed at a substantially intermediate position in the upper bumpasty 1d. As described above, the lower bumpasty 2d becomes stronger than the upper bumpasty 1d. Further, by providing the through-hole 16 in the upper bumpasty 1d, it is possible to further improve the impact energy absorption effect when the impact force acts in the front-rear direction. Although the thickness of the bumper reinforcement side 18 is not described in the above description, the thickness of the bumper reinforcement side 18 is made substantially the same as that of the upper bumper tea 1 etc. in consideration of the impact energy absorption effect.
[0019]
In the above description, the means for improving the rigidity around the mounting seat 6 is not specifically described. However, as described above, the deformation can be concentrated on the upper side of the bumper tee 1 when the impact force is applied. The periphery of the mounting seat 6 is preferably formed with higher rigidity than the periphery of the mounting seat 5. For example, the rigidity of the part can be improved by connecting the cab mount bracket and the like to the mounting seat 6 side.
[0020]
【The invention's effect】
1) According to the collision safety structure of the bumper mounting portion in the body-equipped vehicle according to claim 1 of the present invention, the bumper and the front are provided by interposing each stay between the bumper reinforcement and the front end panel. Appropriate clearance is maintained between the end panel and the impact force is prevented from acting directly from the bumper side to the body side at the time of low-speed collision, and the upper bumper tee is connected to a relatively low-rigidity deflector panel. By connecting the lower side bumper tee to the relatively high rigidity front end lower panel, the impact energy is effectively absorbed when the impact force in the front-rear direction is applied.
2) According to the collision safety structure of the bumper mounting portion in the frame-equipped body vehicle according to claims 2 to 5 of the present invention, the lower bumpasty is formed with higher strength than the upper bumper tee, and Even if a person gets on, the deformation of the bumper downward can be prevented.
3) According to the collision safety structure of the bumper mounting portion in the frame-equipped body vehicle according to claim 6 of the present invention, the through hole is formed at a substantially intermediate position between the upper bumper tee and the bumper reinforcement side. Absorption of impact energy at the time of impact force action is performed more effectively.
4) According to the collision safety structure of the bumper mounting portion in the frame-equipped vehicle according to the seventh aspect of the present invention, a small clearance is formed between the bumper and the front end panel, so that the appearance can be maintained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an overall outline structure of a collision safety structure of a bumper mounting portion in a body vehicle with a frame according to the present invention.
FIG. 2 is a side sectional view of FIG.
FIG. 3 is a partial side cross-sectional view showing specific means for giving a strength difference between the upper and lower bumpersities according to the present invention.
FIG. 4 is a partial side cross-sectional view showing specific means for giving a difference in strength between the upper and lower bumpersities according to the present invention.
FIG. 5 is a perspective view showing a lower side bumper tea in FIG. 4;
FIG. 6 is a partial cross-sectional view showing specific means for giving a strength difference between the upper and lower bumpersities according to the present invention.
7 is a partial side cross-sectional view showing a case where a through hole is provided in the upper side bumper tee in FIG. 6;
FIG. 8 is a perspective view showing an upper side bumper tea in FIG. 7;
FIG. 9 is a schematic view showing an example of a conventional bumper mounting structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Upper side bump pasty 1a Upper side bump pasty 1b Upper side bump pasty 1c Upper side bump pasty 1d Upper side bump pasty 2 Lower side bump pasty 2a Lower side bump pasty 2b Lower side bump pasty 2c Lower side bump pasty 2d Lower side bump pasty 3 Edge 4 Mounting seat 5 Mounting seat 6 Mounting seat 7 Foot portion 7a Mounting hole 8 Foot portion 8a Mounting hole 9 Connecting portion 10 Connecting portion 11 Hook portion 12 Hook portion 13 Bumper reinforcement 14 Bumper mounting side bracket 15 Mounting hole 16 Through hole 17 Through hole 18 Bumper reinforcement side 19 Front end panel 20 Front end upper panel 21 Front end lower panel 22 Deflector panel 23 Bumper 26 Reinforcing flange

Claims (7)

The front end panel and the front end lower panel of a body car with a frame, and a front end panel and a bumper that are integrally constructed between the front end lower panel and a deflector panel that is less rigid than the front end lower panel are held. A bumper mounting portion for securing safety on the body side at the time of a collision, the collision safety structure including the deflector panel and the bumper reinforcement Between the upper bumper tee constructed between the front end lower panel and the bumper reinforcement, and between the side surface of the front end lower panel and the edge of the bumper reinforcement. With a bumper reinforcement side erected on the front, Collision safety structure of the bumper mounting portion of the frame with the body vehicle and forming an appropriate clearance between the bumper and the bumper reinforcement side and the front end panel. The collision safety structure for a bumper mounting portion in a body vehicle with a frame according to claim 1, wherein the lower bumpasty is formed with higher rigidity than the upper bumpasty. The lower and upper bumpers are made of a material having the same thickness, the upper and lower bumpers are made of a general steel plate, and the lower and lower bumpers are made of a high-strength steel plate having a strength higher than that of the upper and lower bumpersty. The collision safety structure for a bumper mounting portion in a body vehicle with a frame according to claim 2. 3. The bumper mounting portion of the vehicle body with frame according to claim 2, wherein the lower and upper bumpers are made of a material having the same plate thickness, and the lower bumpers are provided with reinforcing flanges. Collision safety structure. 3. The collision safety structure for a bumper mounting portion in a frame-equipped body vehicle according to claim 2, wherein the lower bumpus tee is made of the same material having a thicker plate thickness than the upper bumpast tee. 6. The collision safety structure for a bumper mounting portion in a body vehicle with a frame according to claim 5, wherein a through hole is formed at a substantially intermediate position in the upper bumper tee and the bumper reinforcement side. The collision safety structure for a bumper mounting portion in a body vehicle with a frame according to claim 1, wherein the appropriate clearance is a small clearance that does not impair the appearance.

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