JP7031255B2 - Vehicle rear structure - Google Patents

Description

The present invention relates to a vehicle rear structure.

For example, Patent Document 1 describes that a low-voltage battery and an inverter are arranged in a spare tire storage portion provided on a rear floor panel in a vehicle rear structure.

Further, in Patent Document 1, when a heavy low-voltage battery and an inverter are arranged in the spare tire storage portion, the rear floor panel durability is suppressed by suppressing the displacement of the spare tire storage portion in the vehicle vertical direction. In order to improve the performance, the first fixing part and the second fixing part of the inverter mounting bracket are arranged along the vehicle front-rear direction, and the battery mounting lean force is arranged along the vehicle width direction. Is described.

Japanese Patent No. 6078013 (Japanese Patent Laid-Open No. 2015-151118)

In the vehicle having the auxiliary battery, the inventor of the present application faces downward to the rear floor side 5R coupled to the outside of the vehicle of the rear side member 4R arranged on the right side of the vehicle of the rear spare tire storage portion 3, for example, as shown in FIG. We are developing a structure in which a concave portion 53 is formed and the auxiliary battery 8 is housed in the concave portion 53.

In the process, we found that there is room for improvement in the following points. That is, the rear wheel house inner 7R arranged in front of the rear floor side 5R is a shared product regardless of the type of vehicle, not a dedicated product for the vehicle to be mounted, in order to reduce the vehicle manufacturing cost. However, in that case, depending on the type of vehicle to be mounted, for example, as shown in FIGS. 11 and 12, the front part of the rear floor side 5R on the right side of the vehicle and the rear part of the rear wheel house inner 7R on the right side of the vehicle. Can occur, for example, to be separated (offset) in the vertical direction of the vehicle.

Therefore, the separated portion is closed by using the extension panel 58. The extension panel 58 is coupled to the front portion of the rear floor side 5R on the right side of the vehicle and the rear portion of the rear wheel house inner 7R, respectively.

In such a vehicle, for example, when the trailer can be towed although not shown, in the situation where the trailer is towed, when the vehicle is braked (sudden stop), the trailer is further connected to the outside of the rear floor side 5R on the right side of the vehicle. Since the load from the outside to the inside in the left-right direction of the vehicle (see the arrow 100 in FIG. 10) is input to the side member outer 6R, the rear floor side 5R on the right side of the vehicle, the extension panel 58, and the vehicle As shown by the arrow 200 in FIG. 10, the right side member outer 6R is easily deformed so as to be caught inside the vehicle.

On the other hand, in the situation where the trailer is towed, when the vehicle starts (suddenly starts), a load in the direction opposite to the load is input to the side member outer 6R, so that the rear floor side 5R on the right side of the vehicle, the extension. The panel 58 and the side member outer 6R on the right side of the vehicle are likely to be deformed in the direction opposite to the arrow 200 in FIG.

As such is repeated, stress tends to be concentrated on the joint portion (for example, spot welding spot) 10 between the front portion of the rear floor side 5R on the right side of the vehicle and the rear portion of the rear wheel house inner 7R.

In view of such circumstances, in the vehicle rear structure, in the vehicle rear structure, a load from the outside to the inside in the vehicle left-right direction or a load in the opposite direction is input to the rear floor side through the side member outer on one side in the vehicle left-right direction. The purpose is to make it possible to suppress the deformation of the rear floor side due to this.

The vehicle rear structure according to the present invention includes a pair of rear side members connected to both sides of the rear floor panel in the left-right direction of the vehicle, a rear floor side connected to the outside of the vehicle of the pair of rear side members, and the front and rear of the vehicle on the rear floor side. A rear wheel house inner provided in front of each direction and a side member outer coupled to the outside of the vehicle on the rear floor side are provided, and one of the rear floor sides is a coupling between the rear floor panel and the rear side member. The one rear floor side is provided with a concave portion for accommodating an auxiliary battery that is recessed downward, and the front wall portion of the concave portion on the one rear floor side is provided with a concave portion. A reinforcing portion extending toward the rear portion of the rear wheel house inner located in front of the rear floor side and connected to the rear portion of the rear wheel house inner and the side member outer is integrally connected. It is characterized by that.

In this configuration, the reinforcing portion improves the load bearing capacity of the rear floor side in the left-right direction of the vehicle as compared with the comparative example shown in FIGS. 10 to 12.

This makes it possible to suppress the deformation of the rear floor side due to the input of the load from the outside to the inside in the left-right direction of the vehicle or the load in the opposite direction to the rear floor side through the side member outer.

The vehicle rear structure according to the present invention suppresses deformation of the rear floor side due to input of a load from the outside to the inside in the left-right direction of the vehicle or a load in the opposite direction to the rear floor side through the side member outer. Will be possible.

In one embodiment of the vehicle rear structure according to the present invention, it is an arrow view of the cross section taken along the line (1)-(1) of FIG. It is a perspective view of the vehicle rear structure of FIG. 1 with the lower side facing up. It is a figure which enlarges and shows the part surrounded by the alternate long and short dash line of FIG. FIG. 2 is a plan view showing a region on the right side of the vehicle in FIG. It is an arrow view of the cross section (5)-(5) of FIG. It is a perspective view which shows the simple substance of the rear floor side of FIG. It is a figure corresponding to FIG. 1 in another embodiment of the vehicle rear structure which concerns on this invention. FIG. 7 is a view corresponding to FIG. 3 in the vehicle rear structure of FIG. It is a perspective view which shows the simple substance of the rear floor side of FIG. It is a figure which corresponds to FIG. 1 in the vehicle rear structure which concerns on a comparative example. It is a view which corresponds to FIG. 3 in the vehicle rear structure of FIG. It is a perspective view which shows the simple substance of the rear floor side of FIG.

Hereinafter, the best embodiment for carrying out the present invention will be described in detail with reference to the accompanying drawings.

1 to 6 show an embodiment of the present invention. It should be noted that FIGS. 2 to 4 show a state in which the rear part of the vehicle is turned upside down in order to make the explanation easy to understand. In the figure, 1 is a vehicle and 2 is a rear floor panel.

The rear floor panel 2 is provided with a spare tire storage unit 3. In the rear floor panel 2, rear side members 4L and 4R are coupled to the left side of the vehicle and the right side of the vehicle of the spare tire storage portion 3.

Lateral flanges 41 and 42 along the left-right direction of the vehicle are provided on the inside of the rear side member 4R on the right side of the vehicle and on the outside of the vehicle. The lateral flanges 41 and 42 are connected to the rear floor panel 2 in a surface contact state.

Rear floor sides 5L and 5R are coupled to the outside of the rear side member 4L on the left side of the vehicle and the rear side member 4R on the right side of the vehicle, respectively.

A lateral flange 51 along the left-right direction of the vehicle is provided inside the vehicle on the rear floor side 5R on the right side of the vehicle. The lateral flange 51 is sandwiched between the lateral flange 42 on the outside of the vehicle of the rear side member 4R on the right side of the vehicle and the joint portion of the rear floor panel 2.

Side member outers 6L and 6R are coupled to both sides of the rear floor sides 5L and 5R in the left-right direction of the vehicle.

A downward flange 52 along the vertical direction of the vehicle is provided on the outside of the rear floor side 5R on the right side of the vehicle. A downward flange 61 along the vertical direction of the vehicle is provided inside the vehicle of the side member outer 6R on the right side of the vehicle. The downward flange 52 of the rear floor side 5R on the right side of the vehicle is coupled to the downward flange 61 of the side member outer 6R on the right side of the vehicle in a surface contact state.

As shown in FIG. 2, the rear wheel house inner 7L on the left side of the vehicle is connected to the left side of the vehicle on the rear floor panel 2, and the rear wheel house inner 7R on the right side of the vehicle is connected to the right side of the vehicle on the rear floor panel 2. The rear wheel house inner 7R on the right side of the vehicle is further coupled to the rear floor side 5R on the right side of the vehicle and the side member outer 6R on the right side of the vehicle as described below.

Further, an auxiliary battery 8 is mounted on the rear portion of the vehicle 1. Specifically, as shown in FIGS. 5 and 6, the rear floor side 5R on the right side of the vehicle is provided with a concave portion 53 that is recessed downward in the vehicle 1. The auxiliary battery 8 is housed in the concave portion 53.

The front wall portion 54 of the concave portion 53 has a slope shape that is inclined diagonally downward from the front side to the rear side of the vehicle. A reinforcing portion 55 is integrally connected to the upper side of the front wall portion 54.

As shown in FIGS. 1 and 3, the reinforcing portion 55 extends from the upper side of the front wall portion 54 toward the rear of the rear wheel house inner 7R on the right side of the vehicle, and extends from the rear wheel house inner 7R on the right side of the vehicle. The rear side member outer 6R on the right side of the vehicle and the side member outer 6R on the right side of the vehicle are connected to the right side area 21 of the vehicle on the rear floor panel 2, respectively.

As shown in FIGS. 1 and 6, the reinforcing portion 55 of this embodiment has a flat plate shape along the vehicle front-rear direction and the vehicle left-right direction, respectively, and is a region closer to the rear side member 4R on the right side of the vehicle at the front end thereof. Is provided with a protruding piece 56 that tapers toward the front of the vehicle.

The flat plate-shaped reinforcing portion 55 is arranged so as to be flush with the upper surface (lateral flange 42 on the outside of the vehicle) of the rear side member 4R on the right side of the vehicle.

As shown in FIG. 6, a downward flange 57 along the vertical direction of the vehicle is provided in a region extending from the front end of the reinforcing portion 55 to the outer edge of the projecting piece 56.

As shown in FIG. 3, the portion of the downward flange 57 provided at the front end of the reinforcing portion 55 is connected to the rear wheel house inner 7R on the right side of the vehicle in a state of surface contact from the front-rear direction of the vehicle, and the downward flange. The portion provided on the protruding piece 56 in 57 is connected to the rear wheel house inner 7R on the right side of the vehicle in a state of being in surface contact from the left and right directions of the vehicle.

Further, the tip portion of the projecting piece 56 is coupled to the vehicle right side region 21 of the rear floor panel 2 in a state of being in surface contact with the vehicle from the vertical direction of the vehicle.

These bonds are spot welded and are represented by circles in FIGS. 2 to 4. However, the connection can be, for example, arc welding, bolt fastening, rivet fastening, or the like, in addition to spot welding.

By the way, when the trailer (not shown) can be towed by this vehicle 1, a hitch member 9 of a towing hitch is attached to a substantially center in the left-right direction of the vehicle at the rear end of the vehicle 1 (see FIGS. 2 and 5).

By the way, in a vehicle 1 having such a vehicle rear structure, a trailer (not shown) is connected to a hitch member 9 of the towing hitch, and a trailer (not shown) is towed. As shown by 100, the load from the outside to the inside in the left-right direction of the vehicle is input to the rear floor side 5R on the right side of the vehicle through the side member outer 6R on the right side of the vehicle.

In such a situation, in the vehicle rear structure of this embodiment, the flat plate-shaped reinforcing portion 55 is coupled to the upper surface of the rear side member 4R on the right side of the vehicle (lateral flange 42 on the outside of the vehicle) so as to be flush with each other. When the load (see arrow 100 in FIG. 1) is input, the reinforcing portion 55 along the vehicle left-right direction is compressed from the vehicle left-right direction, and as a result, the vehicle on the rear floor side 5R on the right side of the vehicle. The load bearing capacity in the left-right direction is improved as compared with the cases shown in FIGS. 10 to 12 which are comparative examples.

As a result, according to the embodiment to which the present invention is applied, a load from the outside to the inside in the left-right direction of the vehicle is input to the rear floor side 5R on the right side of the vehicle through the side member outer 6R on the right side of the vehicle (see arrow 100 in FIG. 1). At that time, it becomes possible to suppress the deformation of the rear floor side 5R on the right side of the vehicle.

Along with this, the stress concentration on the joint portion (for example, spot welding spot) 10 between the protruding piece 56 of the reinforcing portion 55 and the rear portion of the rear wheel house inner 7R on the right side of the vehicle is relaxed, so that the joint portion becomes It becomes difficult to break for a long period of time.

On the other hand, in the situation where the trailer is towed, a load in the direction opposite to the load (see arrow 100 in FIG. 1) is input to the side member outer 6R when the vehicle starts (suddenly starts). In that case, the reinforcing portion 55 along the left-right direction of the vehicle is pulled from the left-right direction of the vehicle, and as a result, the load capacity of the rear floor side 5R on the right side of the vehicle in the left-right direction of the vehicle is a comparative example. Therefore, it is improved as compared with the case shown in FIG.

Accordingly, according to the embodiment to which the present invention is applied, when a load in the direction opposite to the load in the direction of arrow 100 in FIG. 1 is input to the rear floor side 5R on the right side of the vehicle through the side member outer 6R on the right side of the vehicle, the vehicle It is possible to suppress the deformation of the rear floor side 5R on the right side.

Along with this, the stress concentration on the joint portion (for example, spot welding spot) 10 between the protruding piece 56 of the reinforcing portion 55 and the rear portion of the rear wheel house inner 7R on the right side of the vehicle is relaxed, so that the joint portion becomes It becomes difficult to break for a long period of time.

The present invention is not limited to the above embodiment, and can be appropriately modified within the scope of the claims and within the scope equivalent to the scope.

(1) For example, FIGS. 7 to 9 show other embodiments of the present invention. In this embodiment, the front wall portion 54 of the concave portion 53 of the rear floor side 5R on the right side of the vehicle is shaped so as to have a step in the vertical direction of the vehicle, and the length of the reinforcing portion 55 in the vehicle left-right direction is shortened.

By providing such a step, as shown in FIG. 7, in the front wall portion 54 of the concave portion 53 of the rear floor side 5R on the right side of the vehicle, the height h1 from the bottom surface of the concave portion 53 to the middle plane portion 54a and the middle plane. The height h2 from the portion 54a to the reinforcing portion 55 is lower than the height of the front wall portion 54 of the above embodiment, respectively.

By doing so, when the concave portion 53 of the rear floor side 5R on the right side of the vehicle is deep-drawn, the processing can be performed relatively easily.

Then, by providing the above-mentioned step, the middle flat portion 54a of the reinforcing portion 55 is separated from the rear portion of the rear wheel house inner 7R on the right side of the vehicle by the amount of the step in the vertical direction of the vehicle. An extension panel 58 is attached to the separated portion in order to close the separated portion.

In the case of this embodiment, the rear floor side 5R on the right side of the vehicle can be manufactured relatively easily, and the load capacity of the rear floor side 5R on the right side of the vehicle in the vehicle left-right direction can be improved.

(2) In the above embodiment, an example in which the auxiliary battery 8 is housed in the rear floor side 5R on the right side of the vehicle is given, but the present invention is not limited to this.

In the present invention, for example, the auxiliary battery 8 may be housed in the rear floor side 5L on the left side of the vehicle, and the same reinforcing portion 55 as described above may be provided in the rear floor side 5L on the left side of the vehicle.

(3) In the above embodiment, an example in which the auxiliary battery 8 is used as the object to be stored in the concave portion 53 is given, but the present invention is not limited to this.

In the present invention, the object to be stored in the concave portion 53 can be, for example, a jack which is a part of a tire repair kit or the like, or any other appropriate object.

INDUSTRIAL APPLICABILITY The present invention can be suitably used for a vehicle rear structure in which a concave portion is provided in the vehicle rear.

1 vehicle 2 rear floor panel
21 Vehicle right area 3 Spare tire storage 4L Rear side member on the left side of the vehicle 4R Rear side member on the right side of the vehicle 5L Rear floor side on the left side of the vehicle 5R Rear floor side on the right side of the vehicle
53 Concave part
54 Front wall
55 Reinforcement part
56 Protruding piece of reinforcement 6L Side member outer on the left side of the vehicle 6R Side member outer on the right side of the vehicle 7L Rear wheel house inner on the left side of the vehicle 7R Rear wheel house inner on the right side of the vehicle 8 Auxiliary battery (object)
9 Hitch member of towing hitch 10 Connection part between rear floor side 5R on the right side of the vehicle and rear wheel house inner 7R on the right side of the vehicle 100 Load input direction

Claims (1)

A pair of rear side members connected to both sides of the rear floor panel in the left-right direction of the vehicle, a rear floor side connected to the outside of the vehicle of the pair of rear side members, and a rear wheel provided in front of the rear floor side in the front-rear direction of the vehicle. It is equipped with a house inner and a side member outer that is coupled to the outside of the vehicle on the rear floor side.
One of the rear floor sides is coupled to a joint portion between the rear floor panel and the rear side member.
One of the rear floor sides is provided with a concave portion for accommodating an auxiliary battery that is recessed downward in the vehicle.
On the one rear floor side, the front wall portion of the concave portion extends toward the rear portion of the rear wheel house inner located in front of the rear floor side, and also extends to the rear portion of the rear wheel house inner and the side member. The rear structure of the vehicle is characterized in that the reinforcing portion to be connected to the outer is integrally connected.

Images