JP4774976B2 - Rear body structure of the vehicle - Google Patents

Description

  The present invention relates to a rear body structure of a vehicle, and more particularly to a rear body structure for improving rigidity in the vicinity of a wheel house to which a part of a rear wheel suspension device is attached.

  2. Description of the Related Art Conventionally, there has been known a vehicle body structure that suppresses inward tilting or the like of a wheel house to which a part of a rear wheel suspension device is attached, increases not only vehicle body rigidity but also suspension support rigidity, and improves maneuverability.

  For example, in Patent Document 1 below, the opening edge portion of the back door and the top portion of the wheel house are connected by a connecting member extending in the vehicle front-rear direction, thereby improving the support rigidity of the rear wheel suspension device, and A vehicle body structure that suppresses a decrease in rigidity is disclosed.

  Further, Patent Document 2 discloses a vehicle body structure in which a reinforcing member extending in the vehicle vertical direction is installed from the wheel house to the floor panel to increase the mounting rigidity of the rear wheel suspension device.

JP 2005-199855 A JP 11-348826 A

  By the way, depending on the requirements of the vehicle's running performance, suspension type, and vehicle layout, a part of the rear wheel suspension device (for example, a damper) is offset in either the vehicle longitudinal direction instead of the top of the wheel house. In some cases, it is attached to the lower part of the wheel house.

  In this case, since the input load from a part of the rear wheel suspension device acts on the lower position that is not the top of the wheel house, the conventional vehicle body structure cannot sufficiently support the input load in a distributed manner. The problem arises.

  According to the vehicle body structure of Patent Document 1 described above, the mounting position (top) of the connecting member and the mounting position of a part of the rear wheel suspension device are greatly separated from each other. Can not.

  Further, according to the vehicle body structure of Patent Document 2 described above, since it is simply supported by a single reinforcing member extending in the vertical direction, it is difficult to disperse the input load and the support rigidity of the rear wheel suspension device is insufficient. Problems arise.

  Therefore, the present invention reliably supports an input load input from the rear wheel suspension device in a vehicle rear body structure in which a part of the rear wheel suspension device is provided at the lower portion of the wheel house, and the load is It is an object of the present invention to provide a rear vehicle body structure of a vehicle that can increase support rigidity by distributed transmission and increase rigidity of a mounting portion of a rear wheel suspension device.

The rear vehicle body structure of the vehicle according to the present invention fixes a wheel house bulging toward the vehicle interior side to accommodate the rear wheel of the vehicle and a part of the rear wheel suspension device at a position below the top of the wheel house. A vehicle body structure including a mounting portion that includes a connecting gusset that extends in the vehicle front-rear direction and connects the vicinity of the mounting portion and a vehicle body side wall or a vehicle body rear wall on the vehicle rear side. A vehicle body floor positioned inward and below in the width direction and a floor gusset for connecting the connecting gusset, and the floor gusset is coupled to the connecting gusset in the vicinity of the mounting portion, and the mounting portion and the floor The gusset is located behind the top of the wheel house, and the connecting gusset is connected to the wheel housing from the vicinity of the mounting portion and the upper portion of the floor gusset. Those that extends upwardly and rearwardly so as to separate from.

According to the above configuration, in the vehicle rear body structure in which a part of the rear wheel suspension device is provided at the lower part of the wheel house, the connection gusset and the floor gusset are provided, and both gussets are coupled in the vicinity of the attachment part. Thus, the input load from the rear wheel suspension device is reliably transmitted to the connecting gusset and the floor gusset.
For this reason, even if a part for attaching the rear wheel suspension device is provided at the lower part of the wheel house, the input side load and the vehicle body floor or the vehicle body rear wall and the vehicle body can be effectively input through the connecting gusset and the floor gusset. Since it can disperse | distribute and transmit to a floor, the support rigidity of an attaching part can be improved.

  Here, a part of the rear wheel suspension device includes a damper, a suspension link, a coil spring, and the like. In particular, in the case of a damper, since the mounting portion is set at a position offset from the bump position of the rear wheel, not only the vertical load but also the vehicle longitudinal load and the vehicle width load are input. The input load in all directions can be distributed more effectively, and the support rigidity of the mounting portion can be increased.

In one embodiment of the present invention, the floor gusset is connected to the connection gusset at at least two connection points spaced in the vertical direction or the vehicle width direction, and the attachment portion is provided between the two connection points. Is set to be located.
According to the said structure, a connection gusset and a floor gusset are connected by the at least 2 connection point spaced apart in the up-down direction or the vehicle width direction so that the attachment part of a rear-wheel suspension apparatus may be straddled.
For this reason, both gussets are connected so as to sandwich the mounting portion, and the input load in all directions of a part of the rear wheel suspension device can be more effectively transmitted to the connection gusset and the floor gusset, It is possible to better suppress the displacement of the attachment portion by the connecting gusset and the floor gusset.
Therefore, the support rigidity improvement of the attachment part by a connection gusset and a floor gusset can be improved more.

In one embodiment of the present invention, the connection direction of the two connection points is set to be different from each other.
According to the said structure, since the connection direction of two connection points differs, even if the input load of a certain specific direction acts, the connection force of a connection gusset and a floor gusset does not fall.
Therefore, for example, even if an input load in the torsional direction acts on the attachment portion, the connection force between the connection gusset and the floor gusset does not weaken, and the support rigidity of the attachment portion can be reliably increased.

In one embodiment of the present invention, the floor gusset includes a main floor gusset that connects the vehicle body floor and the connection gusset, and a sub-floor gusset that connects the main floor gusset and the connection gusset.
According to the above configuration, the floor gusset is composed of two parts, the main floor gusset and the sub-floor gusset, so that even if the floor gusset has a complicated shape, such as when the sub-floor gusset has another function, each press molding is performed. It can be performed for each gusset, can be easily molded, and the production cost can be reduced.
In addition, by configuring the floor gusset separately from the main floor gusset and sub-floor gusset, the presence or change of the sub-floor gusset can be easily performed depending on the vehicle type and destination, etc. Can be achieved.

The rear vehicle body structure of the vehicle according to the present invention includes a wheel house bulging and formed on the vehicle interior side to accommodate the rear wheel of the vehicle, and a part of the rear wheel suspension device at a position below the top of the wheel house. A vehicle body structure including a mounting portion for fixing the vehicle, the connecting gusset extending in the vehicle front-rear direction and connecting the vicinity of the mounting portion and the vehicle body side wall or the vehicle body rear wall on the vehicle rear side, and the mounting portion A vehicle body floor located in the vehicle width direction and below and a floor gusset for connecting the connection gusset, and the floor gusset is coupled to the connection gusset in the vicinity of the mounting portion, and the floor gusset is The connection gusset is connected at at least two connection points spaced in the vertical direction or the vehicle width direction, and the attachment portion is set to be positioned between the two connection points. The connecting direction of the two connecting points is set to be different from each other, the floor gusset is connected to the main floor gusset for connecting the vehicle body floor and the connecting gusset, and the main floor gusset is connected to the connecting gusset. It consists of sub-floor gussets.

According to the above configuration, in the vehicle rear body structure in which a part of the rear wheel suspension device is provided at the lower part of the wheel house, the connection gusset and the floor gusset are provided, and both gussets are coupled in the vicinity of the attachment part. Thus, the input load from the rear wheel suspension device is reliably transmitted to the connecting gusset and the floor gusset.
For this reason, even if a part for attaching the rear wheel suspension device is provided at the lower part of the wheel house, the input side load and the vehicle body floor or the vehicle body rear wall and the vehicle body can be effectively input through the connecting gusset and the floor gusset. Since it can disperse | distribute and transmit to a floor, the support rigidity of an attaching part can be improved.

Here, a part of the rear wheel suspension device includes a damper, a suspension link, a coil spring, and the like. In particular, in the case of a damper, since the mounting portion is set at a position offset from the bump position of the rear wheel, not only the vertical load but also the vehicle longitudinal load and the vehicle width load are input. The input load in all directions can be distributed more effectively, and the support rigidity of the mounting portion can be increased.

Further, the connection gusset and the floor gusset are connected by at least two connection points that are separated in the vertical direction or the vehicle width direction so as to straddle the attachment portion of the rear wheel suspension device.
For this reason, both gussets are connected so as to sandwich the mounting portion, and the input load in all directions of a part of the rear wheel suspension device can be more effectively transmitted to the connection gusset and the floor gusset, It is possible to better suppress the displacement of the attachment portion by the connecting gusset and the floor gusset.
Therefore, the support rigidity improvement of the attachment part by a connection gusset and a floor gusset can be improved more.

Further, since the connecting directions of the two connecting points are different, the connecting force between the connecting gusset and the floor gusset does not decrease even when an input load in a specific direction is applied.
Therefore, for example, even if an input load in the torsional direction acts on the attachment portion, the connection force between the connection gusset and the floor gusset does not weaken, and the support rigidity of the attachment portion can be reliably increased.

Also, because the floor gusset is composed of two parts, the main floor gusset and the sub-floor gusset, even if the floor gusset has a complicated shape, such as when the sub-floor gusset has different functions, press molding is performed for each gusset. Therefore, the molding can be easily performed and the production cost can be reduced.
In addition, by configuring the floor gusset separately from the main floor gusset and sub-floor gusset, the presence or change of the sub-floor gusset can be easily performed depending on the vehicle type and destination, etc. Can be achieved.

In one embodiment of the present invention, the sub-floor gusset is provided with a luggage compartment hook.
According to the above configuration, the luggage compartment hook can be set using the sub floor gusset without providing the luggage compartment hook by providing the luggage compartment hook on the sub floor gusset.
Also, by setting the luggage compartment hook on the sub-floor gusset separate from the main floor gusset, the luggage compartment hook can be set at the optimum position according to the luggage compartment shape without changing the shape of the main floor gusset. You can also.

In an embodiment of the present invention, the extending direction of the connecting gusset is substantially coincident with a main load input of a part of the rear wheel suspension device.
According to the said structure, with respect to the main load input direction from a part of rear-wheel suspension apparatus, it will install in the positional relationship which a connection gusset stretches.
For this reason, the input load from a part of rear-wheel suspension apparatus can be reliably transmitted to a connection gusset, and the displacement of an attachment part can be suppressed reliably.
Therefore, the rigidity of the vehicle body can be improved, the support rigidity of the mounting portion can be increased, and the operability of the vehicle can also be improved.

  According to the present invention, even if a part of the rear wheel suspension device is provided at the lower portion of the wheel house, the input load is effectively distributed to the vehicle body side wall and the vehicle body floor, or the vehicle body rear wall and the vehicle body floor. Thus, the supporting rigidity of the mounting portion can be increased.

  Therefore, in the rear body structure of the vehicle in which a part of the rear wheel suspension device is provided at the lower part of the wheel house, the input load input from the rear wheel suspension device is reliably supported and the load is distributed and transmitted. Thus, the support rigidity can be increased, and the rigidity of the mounting portion of the rear wheel suspension device can be increased.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, the first embodiment will be described with reference to FIGS. 1 is a rear perspective view of a rear luggage compartment of a vehicle adopting the rear vehicle body structure of the present invention as seen from the vicinity of a back door opening, and FIG. 2 is a side view of a side wall portion of the rear luggage compartment as seen from the inside of the vehicle. FIG. 3 is a rear view of the side wall portion of the rear luggage compartment as viewed from the rear of the vehicle. In addition, each figure has shown the state before mounting | wearing the trim member which comprises the cargo compartment surface, and the outer panel of a vehicle side part.

  As shown in FIG. 1, the vehicle body structure of the rear luggage compartment T includes a floor panel 1 that spreads in a substantially horizontal plane in the vehicle front-rear direction and the vehicle width direction, and a side panel 2 that extends in the vehicle front-rear direction and the vertical direction at the vehicle side portion. And a wheel house 3 that bulges inwardly of the vehicle and accommodates a rear wheel (not shown) in the lower portion of the side panel 2 and a vehicle rear end side wall at the rear end of the vehicle. And a rear pillar 4 inclined toward the front side of the vehicle. 1 to 3 mainly illustrate the side wall portion on the right side of the vehicle, the same applies to the left side of the vehicle.

  The floor panel 1 described above is formed substantially flat from the rear end of the vehicle to the front side of the vehicle, and constitutes not only the cargo compartment floor but also the passenger compartment floor. A rear seat (not shown) is installed above the rear seat. Further, as shown in FIG. 2 or 3, a rear side frame 5 extending in the vehicle front-rear direction is joined to the lower side portion of the floor panel 1.

  As shown in FIG. 2, the side panel 2 is provided with a side pillar 2a extending in the vertical direction, and an opening 2b is formed behind the side pillar 2a.

  Further, the wheel house 3 described above includes a wheel house inner 31 bulging inward of the vehicle body in a substantially semicircular shape in accordance with the shape of the rear wheel, and a wheel house outer 32 bulging outward of the vehicle body as shown in FIG. A rear wheel and a part of a rear wheel suspension device (hereinafter referred to as a rear suspension device) are accommodated in the interior.

  As shown in FIG. 2, a mounting portion 7 for attaching a rear suspension damper 6 (hereinafter referred to as a rear damper), which is a part of the rear suspension device, is set at the vehicle rear side lower portion of the top portion 3a of the wheel house inner 31. is doing. This rear damper 6 has a cylindrical shock absorber structure that reduces the impact from the rear wheel by the flow resistance of the enclosed oil. Basically, the cylinder fixed to the rear wheel side and the piston fixed to the vehicle body side It is composed by. In FIG. 2, only the cylinder-side outer cylinder 61 and the piston-side piston rod 62 are shown.

  A coil spring 8 is installed at the lower part of the floor panel 1, and the upper part of the coil spring 8 is supported by the aforementioned rear side frame 5 via a spring seat 81.

  Although not specifically shown, the rear suspension device is configured by a multi-link suspension that supports the rear wheel by a plurality of links.

  As described above, the mounting portion 7 of the rear damper 6 is set at the vehicle rear side lower portion of the wheel house inner 31 because the protrusion amount of the top portion 3a and the front portion 3b of the wheel house 3 is suppressed and the vehicle interior is as much as possible. This is to secure space and enhance the comfort of the passenger compartment.

  However, when the mounting portion 7 of the rear damper 6 is set at this position, as shown in FIG. 2, the upper portion of the rear damper 6 must be inclined and laid out toward the vehicle rear side. As described above, when the rear damper 6 is laid out while being inclined toward the rear of the vehicle, the vertical push-up load inclined from the rear damper 6 toward the rear of the vehicle is input to the mounting portion 7. In this case, an input load in a direction different from that in the case of being attached to the top 3a is applied.

  Therefore, in the present embodiment, the connecting gusset 10 extending in the vertical direction and the vehicle rear side is disposed between the wheel house inner 31 in the vicinity of the attachment portion 7 and the rear pillar 4 inclined to the vehicle front side. The input load acting on the mounting portion 7 is transmitted to the vehicle body inner side (vehicle front side) side surface 4a of the rear pillar 4.

  Further, in the present embodiment, a floor gusset 20 extending inward in the vehicle width direction is also disposed between the lower portion of the connecting gusset 10 and the floor panel 1, and an input load input to the connecting gusset 10 is set to the floor. Transmission to the panel 1 is also performed to distribute the input load acting on the mounting portion 7.

  Next, the detailed structure of this connection gusset 10 and the floor gusset 20 is demonstrated using each sectional drawing and top view shown to FIGS. 4 is a cross-sectional view taken along line AA in FIG. 3, FIG. 5 is a cross-sectional view taken along line BB in FIG. 3, FIG. 6 is a plan view including a cross-section taken along line CC in FIG. 3 is a sectional view taken along line D-D in FIG. 3, and FIG. 8 is a sectional view taken along line E-E in FIG.

  As shown in FIG. 4, the connecting gusset 10 is configured by joining two parts, an upper gusset 11 and a lower gusset 12, with a joining flange 10a. Among these, the upper gusset 11 is provided with an upper joint flange 13 to be joined to the rear pillar 4 and is firmly joined to the rear pillar 4.

  The rear pillar 4 includes a pillar inner 41 and a pillar outer 42, and is configured to form a closed cross section by joining with a joint flange (not shown) so as to reliably support a transmission load from the connecting gusset 10.

  Further, the lower gusset 12 is provided with a lower joint flange 14 and is firmly joined to the vehicle rear side lower part in the vicinity of the mounting portion 7 of the wheel house 3 described above. As shown in FIG. 8, the lower joint flange 14 is joined over the entire surface in the vehicle width direction of the upper surface 31 a of the wheel house inner 31.

  Further, the extending inclination angle α of the connecting gusset 10 is set to substantially coincide with the inclination angle β of the rear damper 6 as shown in FIG. Thereby, the connection gusset 10 can transmit the main input load of the rear damper 6 directly and reliably to the rear pillar 4.

  As shown in FIG. 2, the upper gusset 11 and the lower gusset 12 of the connecting gusset 10 are joined flanges 11a and 12a joined to the side panel 2 at the outer ends, and bent flanges bent to the vehicle front side at the inner ends. By forming 11b and 12b, it is configured to increase the vertical rigidity and reliably transmit the vertical input load from the rear damper 6 to the rear pillar 4. Further, since both the joint flanges 11a and 12a are joined to the side panel 2, the input load from the rear damper 6 can be transmitted to the side panel 2 and the input load acting on the mounting portion 7 can be effectively dispersed. is doing.

  Further, as shown in FIG. 1, two lower and upper openings 15 and 16 are provided in the middle portion of the lower gusset 12 to reduce the weight of the lower gusset 12.

  On the other hand, the above-described floor gusset 20 has a three-month main floor gusset 21 that connects the floor panel 1 and the lower part (lower gusset 12) of the connecting gusset 10 as shown in FIG. It is configured by joining two parts, which are a substantially L-shaped sub-floor gusset 22 that connects the intermediate portion of the gusset 10.

  Of these, the main floor gusset 21 is provided with a floor fastening flange 23 extending in the vehicle width direction at the lower end portion and a gusset fastening flange 24 extending in the vertical direction at the upper end portion, which are respectively connected to fastening members (weld nut W and fastening bolt Y And the stud bolt X and the fastening nut Z) are firmly fastened and fixed to the floor panel 1 and the connecting gusset 10 (see FIG. 5). In particular, the floor fastening flange 23 is fastened so that fastening members (weld nuts W and fastening bolts Y) are positioned in the rear side frame 5 as shown in FIG.

  The sub-floor gusset 22 is provided with a gusset joint flange 25 joined to the main floor gusset 21 at a lower end portion and a gusset fastening flange 26 fastened and fixed to an intermediate portion of the connecting gusset 10 on the vehicle outer side. The flange 25 is joined so as to be integrated with the main floor gusset 21, and is firmly fastened and fixed to the intermediate portion of the connecting gusset 10 by a gusset fastening flange 26 via a fastening member (stud bolt V and fastening nut U). (See FIG. 4).

  The floor gusset 20 is assembled by previously joining the main floor gusset 21 and the sub-floor gusset 22 with the gusset joint flange 25 and then connecting the main floor gusset 21 and the sub-floor gusset 22 (floor gusset 20) to the floor panel. 1 and the connecting gusset 10 are each fastened and fixed by fastening members.

  As shown in FIG. 3, the above-mentioned main floor gusset 21 is curved so as to dent the upper edge 21a so as to suppress the amount of protrusion into the cargo compartment T (the amount of protrusion above the floor panel 1) as much as possible. Even if the main floor gusset 21 protrudes more inwardly in the vehicle width direction than the wheel house inner 31 as in this embodiment, the influence on the luggage compartment T Can be reduced as much as possible.

  Further, as shown in FIG. 6, the upper edge portion 21a of the main floor gusset 21 is also formed with a bending flange 21b that bends forward of the vehicle, thereby increasing the rigidity of the main floor gusset 21 and from the connecting gusset 10 side. The load (the load in the inward direction of the wheel house) can be appropriately transmitted to the floor panel 1.

  As shown in FIG. 3, the above-described sub-floor gusset 22 is provided with a cargo hook 50 for fixing a load in the luggage compartment T at the center thereof. As shown in FIG. 7, the cargo hook 50 includes a rectangular base case 51 and a U-shaped hook member 52 having a rotation fulcrum at the lower end of the base case 51, and a positioning boss 53 and a fastening member 54 ( In FIG. 7, only the weld nut 54a is disclosed) and is fastened and fixed to the sub-floor gusset 22.

  Further, as shown in FIG. 3, the sub-floor gusset 22 is formed with bent portions 22a and 22b between the gusset joint flange 25 and the gusset fastening flange 26, respectively. By providing the bent portions 22a and 22b, the rigidity of the sub-floor gusset 22 itself is increased, and the coupling strength between the intermediate portion of the connecting gusset 10 and the main floor gusset 21 is increased.

  Thus, the floor gusset 20 and the connection gusset 10 which are comprised are fastened by several fastening points, as shown in FIG. Specifically, the fastening points are set at three points, that is, two fastening portions S1 and S2 (see FIG. 5) of the lower main floor gusset 21 spaced apart in the vertical direction and one fastening portion M1 of the upper sub-floor gusset 22. is doing.

  As shown in FIG. 2, these fastening portions S1, S2, M1 are set in a positional relationship so as to straddle the mounting portion 7 of the rear damper 6 in the vertical direction (the height of the fastening portion S1 and the fastening portion M1). The position is indicated by a one-dot chain line H). As a result, it is possible to secure the support rigidity by having a long support span in the vertical direction with respect to the vertical load acting on the mounting portion 7, and appropriately transmit the input load to the floor gusset 20 and the connecting gusset 10. can do.

  In the present embodiment, the support span of each fastening portion S1, S2, M1 is defined with reference to the attachment portion 7, but the attachment portion 7 does not necessarily have to be a reference, and may be a support span that is long in the vertical direction. The same effect can be obtained.

  Further, as shown in FIG. 6, the fastening portions S1, S2, M1 are set in a positional relationship so as to straddle the attachment portion 7 of the rear damper 6 in the vehicle width direction (fastening with the fastening portion S1). The position in the vehicle width direction of the portion M1 is indicated by a one-dot chain line L). As a result, it is possible to secure support rigidity with a long support span in the vehicle width direction against the load in the vehicle width direction (inward falling load) acting on the mounting portion 7, and appropriate for the floor gusset 20 and the connecting gusset 10. The input load can be transmitted to.

  Further, with respect to the fastening direction of each of the fastening portions S1, S2, and M1, the fastening portion M1 of the sub-floor gusset 22 is fastened with an inclination of a first angle γ (about 15 °) from the vehicle longitudinal axis L. In contrast, the fastening portion S1 of the main floor gusset 21 is set so as to be tilted and fastened from the vehicle longitudinal axis L by a second angle δ (about 55 °). Thereby, even when there is a load input in a specific direction such as a load in the torsional direction, the fastening force of the fastening member is not weakened, and the support rigidity of the mounting portion 7 can be reliably ensured.

  In the present embodiment, the fastening portions S1, S2, and M1 are fastened with no inclination angle in the horizontal fastening direction. However, in order to secure the fastening force of the fastening member more reliably, the horizontal fastening direction is used. Also, one may be fastened with an inclination angle, or both may be fastened with different inclination angles.

Next, the effect of this embodiment comprised as mentioned above is explained in full detail.
The rear vehicle body structure of this embodiment has a wheel house 3 bulging and formed on the vehicle interior side to accommodate the rear wheel, and a mounting portion 7 for fixing the rear damper 6 at a position below the top portion 3a of the wheel house 3. A connecting gusset 10 for connecting the vicinity of the mounting portion 7 and the rear pillar 4 on the rear side of the vehicle, and a floor gusset 20 for connecting the floor panel 1 and the connecting gusset 10. The floor gusset 20 is fastened and fixed to the connecting gusset 10 in the vicinity of the attachment portion 7.

According to the above configuration, the connecting gusset 10 and the floor gusset 20 are fastened in the vicinity of the attachment portion 7, so that the input load from the rear damper 6 can be reliably transmitted to the connecting gusset 10 and the floor gusset 20. .
For this reason, even if the mounting portion 7 of the rear damper 6 is provided in the lower part of the wheel house 3, the input load is appropriately applied through the connecting gusset 10 and the floor gusset 20 to the rear pillar 4, the floor panel 1, and further the side panel 2. Therefore, the supporting rigidity of the mounting portion 7 can be increased.

  Therefore, in the rear body structure of the vehicle in which the mounting portion 7 of the rear damper 6 is provided in the lower part of the wheel house 3, the input load input from the rear damper 6 is reliably supported, and the input load is supported by distributed transmission. The rigidity can be increased and the rigidity of the mounting portion 7 of the rear damper 6 can be increased.

In the present embodiment, the mounting portion 7 of the rear damper 6 has been described. However, the mounting portion of the rear suspension device of the present invention is not limited to this, and the mounting portion of the suspension link or the mounting of the coil spring is not limited thereto. Part.
Further, the connecting position of the connecting gusset 10 to the wheel house 3 is not limited to the rear side of the vehicle as in the present embodiment. There may be.

  In the present embodiment, the connecting gusset 10 and the floor gusset 20 are coupled by the fastening member. However, the coupling method of the present invention is not limited to this, for example, welding fixing, fitting fixing, or the like. May be.

Further, in this embodiment, the floor gusset 20 is connected to the connecting gusset 10 by at least two fastening portions S1, M1 that are spaced apart in the vertical direction and the vehicle width direction, and between the two fastening portions S1, M1. It is set so that the mounting portion 7 of the rear damper 6 is located on the rear side.
For this reason, the connection gusset 10 and the floor gusset 20 are connected by at least two fastening portions S1 and M1 that are separated in the vertical direction and the vehicle width direction so as to straddle the attachment portion 7 of the rear damper 6.
Therefore, the input loads in all directions from the rear damper 6 can be more effectively transmitted to the connection gusset 10 and the floor gusset 20, and the displacement of the mounting portion 7 by the connection gusset 10 and the floor gusset 20 is better controlled. Therefore, the supporting rigidity of the attachment portion 7 by the connecting gusset 10 and the floor gusset 20 can be further increased.
In the present embodiment, the fastening portions S1, M1, etc. are set apart from each other in the vertical direction and the vehicle width direction, but may be set so as to be separated only in any one direction.

In this embodiment, the fastening directions of the fastening portion S1 of the main floor gusset 21 and the fastening portion M1 of the sub-floor gusset 22 are set in different directions.
Thereby, since the fastening directions of the two fastening portions S1 and M1 of the connection gusset 10 and the floor gusset 20 are different, even if an input load is applied from a certain direction, the fastening force of the connection gusset 10 and the floor gusset 20 at once. Will not drop.
Therefore, even if an input load in the torsional direction acts on the attachment portion 7, the fastening force between the connection gusset 10 and the floor gusset 20 is not weakened, and the support rigidity of the attachment portion 7 can be reliably increased.

In this embodiment, the floor gusset 20 includes a main floor gusset 21 that connects the floor panel 1 and the connection gusset 10, and a sub-floor gusset 22 that connects the main floor gusset 21 and the connection gusset 10.
As a result, the floor gusset 20 is composed of two parts, the main floor gusset 21 and the sub-floor gusset 22, so that when the sub-floor gusset 22 functions as a cargo hook bracket, press molding can be performed for each gusset. Can be easily formed and the production cost can be reduced.
Further, since the floor gusset 20 is configured separately from the main floor gusset 21 and the sub-floor gusset 22, the presence or change of the sub-floor gusset 22 can be easily performed depending on the vehicle type, destination, etc. The main floor gusset 21 can be shared.

  For example, as in another embodiment shown in FIG. 9, even if a rear body structure in which no cargo hook is provided on the sub-floor gusset 22 is adopted, the “type” shape of the main floor gusset 21 is changed. The main floor gusset 21 having the same shape can be used as it is, and the parts can be shared.

  9 is a rear perspective view corresponding to FIG. 1 as described later, and only the sub-floor gusset 22 is different from the first embodiment.

In the first embodiment, the cargo hook 50 is provided on the sub-floor gusset 22.
Thereby, the cargo hook 50 can be set in the cargo compartment T using the sub-floor gusset 22 without providing a bracket dedicated to the cargo hook.
In addition, since the cargo hook 50 is provided on the sub-floor gusset 22 that is separate from the main floor gusset 21, the cargo hook 50 is placed at an optimal position according to the shape of the cargo compartment T without changing the shape of the main floor gusset 21. It can also be set.

In this embodiment, the extending inclination angle α of the connecting gusset 10 is set to substantially coincide with the rear damper 6 inclination angle β.
As a result, the connecting gusset 10 is installed in such a positional relationship that it stretches with respect to the main load input direction of the rear damper 6, and the main input load of the rear damper 6 is reliably transmitted to the connecting gusset 10. Therefore, the displacement of the attachment portion 7 can be reliably suppressed.
Therefore, the rigidity of the vehicle body can be improved, the support rigidity of the mounting portion 7 can be increased, and the operability of the vehicle can also be improved.

Furthermore, in this embodiment, both the connection gusset 10 and the floor gusset 20 are set so as to extend in the vertical direction (see FIG. 2).
As a result, it is possible to stably and surely apply the input load from the mounting portion 7 to the fastening portions S1, S2, M1 between the connecting gusset 10 and the floor gusset 20 without causing stress concentration due to bending or the like. It can be distributed on the floor panel 1 or the like.

  Next, another embodiment shown in FIGS. 9 and 10 will be described. 9 is a rear perspective view of the second embodiment in which the cargo hook is removed from the sub-floor gusset 22 described above, and FIG. 10 is a rear perspective view of the third embodiment in which the fastening portions of the sub-floor gusset 22 are also two points. These drawings are rear perspective views corresponding to FIG. 1 described above, and the same components are denoted by the same reference numerals and description thereof is omitted.

  In the second embodiment shown in FIG. 9, the floor gusset 20 is configured by removing the cargo hook from the sub-floor gusset 122.

  According to this embodiment, since the load is not fixed to the sub-floor gusset 122, a load when the load is fixed does not act, and a constant support rigidity is always obtained. Therefore, the support rigidity of the mounting portion 7 does not change depending on the presence or absence of luggage, and stable vehicle body rigidity and suspension performance can be obtained at all times.

  On the other hand, the third embodiment shown in FIG. 10 increases the fastening strength of the fastening portions M1 and M2 of the sub-floor gusset 222 by increasing the fastening portions of the sub-floor gusset 222 to two points M1 and M2.

In the structure in which the floor gusset 20 is provided, as shown in FIG. 3, it is necessary to provide a horizontally long notch 100 in the fastening portion M1 of the sub-floor gusset 22 due to problems such as ease of assembly, and the fastening force is inevitably reduced. .
However, by setting two fastening portions M1 and M2 in the sub-floor gusset 222 as in the present embodiment, such a decrease in rigidity due to the notch portion 100 can be compensated, and the fastening portions M1 and M2 of the sub-floor gusset 222 are fastened. The strength can be increased and the support rigidity of the mounting portion 7 can be further increased.

  In addition, about other effect, all embodiment is the same as that of above-mentioned 1st embodiment.

As described above, in the correspondence between the configuration of the present invention and the above-described embodiment,
A part of the rear wheel suspension device of the present invention corresponds to the rear damper 6,
Similarly,
The car body floor corresponds to the floor panel 1,
The connection points correspond to the fastening portions S1, S2, M1, M2,
The luggage compartment hook corresponds to the cargo hook 50,
The present invention is not limited to the above-described embodiment, but includes an embodiment applied to the rear body structure of any vehicle.

The rear perspective view which looked at the vehicle rear part of a first embodiment from the back door opening vicinity. The side view which looked at the side wall part of the rear luggage compartment from the vehicle inside. The rear view which looked at the side wall part of the rear luggage compartment from the vehicle rear. FIG. 4 is a cross-sectional view taken along line AA in FIG. 3. FIG. 4 is a cross-sectional view taken along line BB in FIG. 3. The top view including the CC line cross section of FIG. The DD sectional view taken on the line of FIG. FIG. 3 is a cross-sectional view taken along line EE in FIG. 2. The rear perspective view of 2nd embodiment corresponding to FIG. The rear perspective view of 3rd embodiment corresponding to FIG.

1 ... Floor panel (body floor)
3 ... wheel house 3a ... top 4 ... rear pillar 6 ... rear damper (part of rear wheel suspension)
7 ... Mounting part 10 ... Connecting gusset 20 ... Floor gusset 21 ... Main floor gussets 22, 122, 222 ... Sub-floor gusset 50 ... Cargo hook (loading compartment hook)
S1, S2, M1, M2 ... Fastening part (connection point)

Claims (7)

A rear portion of a vehicle including a wheel house bulging toward the vehicle interior side to accommodate a rear wheel of the vehicle and a mounting portion for fixing a part of the rear wheel suspension device at a position below the top of the wheel house A vehicle body structure,
A connecting gusset that extends in the vehicle front-rear direction and connects the vicinity of the attachment portion and the vehicle body side wall or the vehicle body rear wall on the vehicle rear side;
A vehicle body floor located in the vehicle width direction of the mounting portion and below the floor, and a floor gusset for connecting the connection gusset;
The floor gusset is coupled to the connecting gusset in the vicinity of the attachment portion ,
The mounting portion and the floor gusset are located behind the top of the wheel house,
The vehicle body structure for a rear part of a vehicle, wherein the connection gusset extends upward and rearward from the wheel house so as to be separated from the vicinity of the attachment portion and the upper portion of the floor gusset . The floor gusset is connected to the connection gusset at at least two connection points spaced in the vertical direction or the vehicle width direction,
2. The rear body structure of a vehicle according to claim 1, wherein the attachment portion is set between the two connection points. The connection direction of the two connection points was set to be different from each other.
The rear body structure of the vehicle according to claim 1 or 2 . The floor gusset is composed of a main floor gusset for connecting the vehicle body floor and the connection gusset, and a sub-floor gusset for connecting the main floor gusset and the connection gusset.
The rear body structure of the vehicle according to claim 2 . A rear portion of a vehicle including a wheel house bulging toward the vehicle interior side to accommodate a rear wheel of the vehicle and a mounting portion for fixing a part of the rear wheel suspension device at a position below the top of the wheel house A vehicle body structure,
A connecting gusset that extends in the vehicle front-rear direction and connects the vicinity of the attachment portion and the vehicle body side wall or the vehicle body rear wall on the vehicle rear side;
A vehicle body floor located in the vehicle width direction of the mounting portion and below the floor, and a floor gusset for connecting the connection gusset;
The floor gusset is coupled to the connecting gusset in the vicinity of the attachment portion,
The floor gusset is connected to the connection gusset at at least two connection points spaced in the vertical direction or the vehicle width direction,
While setting so that the mounting portion is located between the two connecting points,
The connection direction of the two connection points is set to be different from each other,
The floor gusset is composed of a main floor gusset for connecting the vehicle body floor and the connection gusset, and a sub-floor gusset for connecting the main floor gusset and the connection gusset.
Rear body structure of the vehicle. The vehicle rear body structure according to claim 4 , wherein a luggage compartment hook is provided on the sub-floor gusset. The extending direction of the connecting gusset substantially coincides with the main load input direction of a part of the rear wheel suspension device.
The rear body structure of the vehicle according to any one of claims 1, 2, 3, 4, and 6 .

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