JP4127642B2 - Reinforcement structure of rear hook support in automobile - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a reinforcing structure for a rear hook support portion in an automobile provided with a rear hook that is supported by a rear portion of a vehicle body and capable of towing an object located behind the vehicle body.
[0002]
[Prior art]
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-198864 [0004]
Conventionally, there is a structure shown in Patent Document 1 as a reinforcing structure for a rear hook support portion in the automobile.
[0005]
According to the above-mentioned Patent Document 1, the rear portion of the vehicle body in the automobile is disposed in the vicinity of the front of the rear floor panel, the hook bracket that is coupled to the lower surface of the rear end portion of the rear floor panel, and supports the rear hook. And a reinforcing member extending in the width direction of the vehicle body and coupled to the lower surface of the rear floor panel.
[0006]
When an object such as another automobile located behind the automobile is to be pulled by the automobile, generally, the object is connected to the rear hook by a wire to advance the automobile and perform the towing. At this time, a hook input is applied to the rear hook as a pulling reaction force, and the hook input is supported by the hook bracket, the reinforcing member, and the rear floor panel via the rear hook.
[0007]
Here, since both the hook bracket and the reinforcing member are coupled to the lower surface of the rear floor panel, a large stress tends to be generated on the upper surface side of the rear floor panel by the hook input.
[0008]
Therefore, in the above-mentioned Patent Document 1, the stress generated on the upper surface side of the rear floor panel is increased by increasing the shape of the hook bracket in a plan view of the vehicle body and improving the strength of the rear floor panel over a wider range. Thus, the support strength of the rear hook with respect to the rear portion of the vehicle body is improved.
[0009]
[Problems to be solved by the invention]
However, when the shape of the hook bracket is increased as described above, the weight of the rear portion of the vehicle body tends to increase correspondingly, which is not preferable for a vehicle that requires further weight reduction.
[0010]
The present invention has been made paying attention to the above circumstances, and improves the support strength of the rear hook for the rear portion of the vehicle body, and even in this case, the increase in the weight of the rear portion of the vehicle body is suppressed. The challenge is to make it.
[0011]
It is another object of the present invention to support the spare tire with respect to the rear portion of the vehicle body with a simple configuration.
[0012]
[Means for Solving the Problems]
The structure for reinforcing the rear hook support portion in the automobile of the present invention for solving the above-described problems is as follows. In addition, the code | symbol attached | subjected to each term in this term does not limit and interpret the technical scope of this invention to the content of the term of the following "embodiment of invention".
[0013]
In the first aspect of the invention, the rear portion of the vehicle body 1 is disposed in the vicinity of the rear floor panel 2, the hook bracket 4 coupled to the lower surface of the rear floor panel 2 to support the rear hook 3, and the front of the hook bracket 4. In a reinforcing structure of a rear hook support portion in an automobile provided with a reinforcing member 5 extending in the width direction of the vehicle body 1 and coupled to the lower surface of the rear floor panel 2,
[0014]
While extending along the upper surface of the rear floor panel 2, and extending across the hook bracket 4 and the reinforcing member 5 in plan view of the vehicle body 1 (FIGS. 2 and 6), the hook bracket 4 and the reinforcing member 5 are extended. And other reinforcing members 6 respectively coupled via the rear floor panel 2,
[0015]
The cross section of the combined body 26 of the rear floor panel 2 and the other reinforcing member 6 above the hook bracket 4 as viewed in the longitudinal direction of the vehicle body 1 (FIGS. 3, 4, and 7) is a closed cross section . the way,
[0016]
The spare tire 29 can be supported on the upper surface of the other reinforcing member 6 in the combined body 26 .
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0018]
(First embodiment)
[0019]
1 to 4 show a first embodiment.
[0020]
In the figure, reference numeral 1 denotes a vehicle body, and an arrow Fr indicates the front in the traveling direction of the vehicle.
[0021]
The rear portion of the vehicle body 1 is made of sheet metal, and the rear portion of the vehicle body 1 is formed by a spot floor S1 to S3 on the rear floor panel 2 that extends substantially horizontally and rearwardly, and the bottom surface of the rear end portion of the rear floor panel 2 by spot welding. A hook bracket 4 coupled to support the rear hook 3 for towing, and disposed at a distance from the hook bracket 4 in the vicinity of the front of the hook bracket 4 and extending substantially over the entire width in the width direction of the vehicle body 1. A reinforcing member 5 coupled to the lower surface of the panel 2 by spot welding S4 and S5 is provided, and a hook input F for pulling an object by the automobile is input to the rear hook 3.
[0022]
Further, the rear portion of the vehicle body 1 is provided with another reinforcing member 6, and the other reinforcing member 6 is positioned substantially at the same position as the rear hook 3 and the hook bracket 4 in the width direction of the vehicle body 1. It extends in the front-rear direction along the upper surface. The other reinforcing member 6 extends so as to straddle the hook bracket 4 and the reinforcing member 5 in a plan view of the vehicle body 1 (FIG. 2), and the rear floor panel is connected to the hook bracket 4 and the reinforcing member 5. 2 are connected by spot welding S1, S2, S5 and S6, respectively.
[0023]
The hook bracket 4 has a box-shaped bracket body 9 that opens upward and supports the rear hook 3 by fixing the rear hook 3 to the outer surface thereof, and projects forward from the front opening edge of the bracket body 9. A front flange 10 joined to the rear floor panel 2 by spot welding S1 and a projecting outward from each side opening edge of the bracket body 9 are joined to the rear floor panel 2 by spot welding S2. A pair of left and right side flanges 11, 11 and a rear flange 12 projecting upward from the rear opening edge of the bracket body 9 and joined to the rear edge of the rear floor panel 2 by spot welding S3, These 9 to 12 are integrally formed with each other by press working.
[0024]
The reinforcing member 5 has an inverted hat shape in a side view of the vehicle body 1 (FIG. 1). The reinforcing members 5 extend in the width direction of the vehicle body 1 and face each other in the front-rear direction. The rear side plates 15 and 16, the bottom plate 17 installed on the lower edge portions of the both side plates 15 and 16, and the front side plate 15 protruding forward from the upper edge portion of the front side plate 15 are spot welded to the rear floor panel 2. A front flange 18 coupled by S4 and a rear flange 19 projecting rearward from the upper edge of the rear plate 16 and coupled to the rear floor panel 2 by spot welding S5. Are integrally formed by pressing.
[0025]
The other reinforcing member 6 includes a pair of left and right beads 22, 22 extending in the front-rear direction in the widthwise direction of the vehicle body 1 of the other reinforcing member 6 and extending substantially in the front-rear direction. As seen from the line of sight along the longitudinal direction of the vehicle body 1 (FIGS. 3 and 4), each has an inverted U shape. The rear floor panel 2 is sandwiched between the left and right side edges 23 and 23 of the other reinforcing member 6 and the front flange 10 and the side flanges 11 of the hook bracket 4, and the three-layer overlapped portion is the spot welded portion. They are connected to each other by S1 and S2. Further, the rear floor panel 2 is sandwiched between the front edge portion 24 of the other reinforcing member 6 and the rear flange 12 of the reinforcing member 5, and the three-layer overlapped portion is coupled to each other by the spot welding S5.
[0026]
As seen from the line of sight along the front-rear direction of the vehicle body 1 (FIGS. 3 and 4), the cross section of the combined body 26 of the rear floor panel 2 and each bead 22 of the other reinforcing member 6 has a closed cross section. 26 is given high strength and rigidity.
[0027]
A support tool 30 is provided on the upper surface side of the rear portion of the vehicle body 1 so that a spare tire 29 having a longitudinal axis 28 can be detachably fixed and supported. The support 30 is positioned substantially in the same direction as the rear hook 3, hook bracket 4, and other reinforcing members 6 in the width direction of the vehicle body 1, and the rear floor panel 2 and the beads 22 of the other reinforcing members 6 Are connected by spot welding S4 and S7, and a support bracket 31 is mounted to support the center portion of the spare tire 29 on its upper surface, and another support for supporting the rear portion of the spare tire 29 on its upper surface. A bracket 32 and a fastener 33 for detachably fastening the central portion of the spare tire 29 to the support bracket 31 are provided. The other support bracket 32 is constituted by the rear portion of each bead 22 of the other reinforcement member 6. That is, the rear portion of the spare tire 29 can be supported by the upper surface of the rear portion of each bead 22 of the other reinforcing member 6.
[0028]
The support bracket 31 is provided so as to straddle the reinforcing member 5 and the front part of each bead 22 of the other reinforcing member 6 in a plan view of the vehicle body 1 (FIG. 2). The front portion of the support bracket 31 is joined by the spot welding S4 in a three-ply manner with the rear floor panel 2 and the reinforcing member 5, and the rear portion is a front portion of each bead 22 of each of the other reinforcing members 6. Are coupled by spot welding S7.
[0029]
The upper surface of each bead 22 of the other reinforcing member 6 has an overall rear-lowering shape together with the upper surface of the rear floor panel 2, and the rear upper surface of each bead 22 of the other reinforcing member 6 is the upper surface of the support bracket 31. Is lower than. Therefore, the spare tire 29 placed and supported on the upper surface of each bead 22 of the other reinforcing member 6 and the upper surface of the support bracket 31 has a rear-lowering posture. 29 occupied space is made small.
[0030]
According to the above configuration, the rear portion of the vehicle body 1 extends along the upper surface of the rear floor panel 2 and extends so as to straddle the hook bracket 4 and the reinforcing member 5 in a plan view of the vehicle body 1 (FIG. 2). The hook bracket 4 and the reinforcing member 5 are provided with other reinforcing members 6 respectively connected to the hook bracket 4 and the reinforcing member 5 via the rear floor panel 2.
[0031]
Therefore, the upper surface side of the rear floor panel 2 is reinforced by another reinforcing member 6 coupled to the upper surface of the rear floor panel 2, and the rear floor panel 2 is reinforced with the hook bracket 4 and the reinforcing member 5 and other reinforcing members. The member 6 is sandwiched from above and below and is reinforced with a good balance. Accordingly, since the support strength of the rear hook 3 with respect to the rear portion of the vehicle body 1 is improved, it is possible to prevent a large stress from being generated in a part of the rear floor panel 2 based on the hook input F to the rear hook 3.
[0032]
The other reinforcing member 6 is coupled to the upper surface of the rear floor panel 2 on the side opposite to the lower surface to which the hook bracket 4 and the reinforcing member 5 are coupled, and The other reinforcing members 6 are respectively connected to the hook bracket 4 and the reinforcing member 5 via the rear floor panel 2 and effectively reinforce the rear floor panel 2 with a good vertical balance as described above. Therefore, the shape of the other reinforcing member 6 can be reduced accordingly. Therefore, even when the support strength of the rear hook 3 is improved as described above, an increase in the weight of the rear portion of the vehicle body 1 is suppressed.
[0033]
Further, as viewed from the line of sight along the front-rear direction of the vehicle body 1 (FIGS. 3 and 4), the cross-section of the combined body 26 of the rear floor panel 2 and the other reinforcing members 6 has a closed cross-sectional shape.
[0034]
Therefore, the strength and rigidity of the rear floor panel 2 can be further effectively improved by the cross-sectional shape of the combination 26, and accordingly, the support strength of the rear hook 3 is further improved. This is achieved by suppressing an increase in the weight of the rear portion of the vehicle body 1.
[0035]
Further, as described above, the spare tire 29 can be supported on the upper surface of the other reinforcing member 6.
[0036]
For this reason, since the other reinforcing member 6 for improving the support strength of the rear hook 3 is used for the support 30 for supporting the spare tire 29 on the rear portion of the vehicle body 1, the spare member 30 is used accordingly. The support of the tire 29 is achieved with a simple configuration.
[0037]
Further, as described above, the support bracket 31 of the support 30 of the spare tire 29 is provided so as to straddle the reinforcing member 5 and the other reinforcing member 6 in a plan view of the vehicle body 1, and the rear floor panel 2. The three reinforcing members 5 are overlapped and joined by the spot welding S4, and are joined to the front portions of the beads 22 of the other reinforcing members 6 by spot welding S7.
[0038]
Therefore, the support bracket 31 further reinforces the coupling of the rear floor panel 2, the hook bracket 4, the reinforcing member 5, and the other reinforcing member 6, and the support strength of the rear hook 3 is accordingly increased. Further improvement.
[0039]
Further, since the support bracket 31 in the support 30 of the spare tire 29 is used to improve the support strength of the rear hook 3, the support strength of the rear hook 3 can be achieved by a simple structure.
[0040]
In addition, the following FIGS. 5-7 has shown 2nd Embodiment. This embodiment is common in many respects to the configuration and operational effects of the first embodiment. Therefore, regarding these common items, common reference numerals are attached to the drawings, and redundant description thereof is omitted, and different points are mainly described. Moreover, you may combine various structures of each part in these each embodiment in light of the subject and effect of this invention.
[0041]
(Second Embodiment)
[0042]
5 to 7 show a second embodiment.
[0043]
In the figure, the reinforcing member 5 is provided only in the middle part of the rear floor panel 2 in the width direction. Further, the rear floor panel 2, the front flange 10 of the hook bracket 4, the rear flange 19 of the reinforcing member 5, and the side edge 23 of the other reinforcing member 6 are joined to each other by spot welding S1, S5 in a four-ply manner, Further, the rear floor panel 2, the front flange 18 of the reinforcing member 5, and the front edge portion 24 of the other reinforcing member 6 are connected to each other by spot welding S4 in a three-layered manner. The front portion of the support bracket 31 is coupled to the rear floor panel 2 by spot welding S8.
[0044]
According to the above configuration, the reinforcing member 5 and the other reinforcing member 6 are directly coupled to each other, and accordingly, the coupling strength of the rear floor panel 2, the hook bracket 4, the reinforcing member 5, and the other reinforcing member 6 to each other. This improves the support strength of the rear hook 3 with respect to the rear portion of the vehicle body 1 more effectively.
[0045]
Although the above is based on the illustrated example, the connection between the rear floor panel 2 and the hook bracket 4 and the connection between the rear floor panel 2 and the other reinforcing member 6 may be performed by individual spot welding. Further, the connection between the rear floor panel 2 and the reinforcing member 5 and the connection between the rear floor panel 2 and the other reinforcing member 6 may be performed by individual spot welding. Further, the connection between the rear floor panel 2 and the reinforcing member 5 and the connection between the rear floor panel 2 and the support bracket 31 may be performed by individual spot welding. Further, the rear floor panel 2, the reinforcing member 5, the other reinforcing member 6, and the support bracket 31 may be coupled to each other by four-layer spot welding S.
[0046]
Further, instead of this, the beads 22 and 22 may have an inverted U-shaped cross section as a whole, that is, the cross section of the other reinforcing member 6 may have a hat shape.
[0047]
【The invention's effect】
The effects of the present invention are as follows.
[0048]
In the first aspect of the invention, the rear portion of the vehicle body is disposed in the vicinity of the front of the rear floor panel, the hook bracket that is coupled to the lower surface of the rear floor panel and supports the rear hook, and extends in the width direction of the vehicle body. In the reinforcing structure of the rear hook support portion in the automobile provided with a reinforcing member coupled to the lower surface of the rear floor panel,
[0049]
In addition to extending along the upper surface of the rear floor panel and extending over the hook bracket and the reinforcing member in a plan view of the vehicle body, the hook bracket and the reinforcing member are coupled to the hook bracket and the reinforcing member via the rear floor panel, respectively. Reinforcing members are provided.
[0050]
Therefore, the upper surface side of the rear floor panel is reinforced by another reinforcing member coupled to the upper surface of the rear floor panel, and the rear floor panel is sandwiched from above and below by the hook bracket, the reinforcing member, and the other reinforcing member. Attached and reinforced with good balance. Accordingly, since the support strength of the rear hook with respect to the rear portion of the vehicle body is improved, it is possible to prevent a large stress from being generated in a part of the rear floor panel based on the hook input to the rear hook.
[0051]
The other reinforcing member is connected to the upper surface of the rear floor panel on the opposite side of the lower surface to which the hook bracket and the reinforcing member are combined, and the reinforcing member is a hook. Since it is connected to the bracket and the reinforcing member via the rear floor panel, and the rear floor panel is effectively reinforced with a good balance in the vertical direction as described above, the shape of the other reinforcing members is increased accordingly. Can be miniaturized. Accordingly, even when the support strength of the rear hook is improved as described above, an increase in the weight of the rear portion of the vehicle body is suppressed.
[0052]
Further, the cross section of the combination of the rear floor panel and other reinforcing members above the hook bracket 4 as viewed in the longitudinal direction of the vehicle body is a closed cross section.
[0053]
For this reason, the strength and rigidity of the rear floor panel can be further effectively improved by the cross-sectional shape of the combined body, and accordingly, the support strength of the rear hook is further improved, and this is the rear part of the vehicle body. This is achieved by suppressing an increase in the weight of the material.
[0054]
In addition, a spare tire can be supported on the upper surface of another reinforcing member in the combination .
[0055]
For this reason, since the other reinforcing member for improving the support strength of the rear hook is used for the configuration for supporting the spare tire on the rear portion of the vehicle body, it is easy to support the spare tire. Achieved by configuration.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a rear part of a vehicle body in a first embodiment.
FIG. 2 is a plan view of the rear part of the vehicle body in the first embodiment.
3 is a cross-sectional view taken along line 3-3 in FIG. 2 according to the first embodiment.
4 is a cross-sectional view taken along line 4-4 of FIG. 2 in the first embodiment.
FIG. 5 is a diagram corresponding to FIG. 1 in the second embodiment.
FIG. 6 is a diagram corresponding to FIG. 2 in the second embodiment.
7 is a cross-sectional view taken along line 7-7 in FIG. 6 in the second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Car body 2 Rear floor panel 3 Rear hook 4 Hook bracket 5 Reinforcement member 6 Other reinforcement member 22 Bead 26 Combination 29 Spare tire 30 Support tool 31 Support bracket 32 Other support bracket F Hook input

Claims (1)

The rear portion of the vehicle body is connected to the rear floor panel, a hook bracket that is coupled to the lower surface of the rear floor panel and supports the rear hook, and is disposed in the vicinity of the front of the hook bracket and extends in the width direction of the vehicle body to the lower surface of the rear floor panel. In the reinforcing structure of the rear hook support portion in the automobile including the reinforcing member to be coupled,
In addition to extending along the upper surface of the rear floor panel and extending over the hook bracket and the reinforcing member in a plan view of the vehicle body, the hook bracket and the reinforcing member are coupled to the hook bracket and the reinforcing member via the rear floor panel, respectively. With reinforcing members
The cross section of the combination of the rear floor panel and the other reinforcing member above the hook bracket as viewed from the line of sight along the front-rear direction of the vehicle body is a closed cross-sectional shape ,
Reinforcing structure of Riyafukku support portion in automobiles which is capable supporting a spare tire on the upper surface of the other reinforcing member in the combination thereof.

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