Vehicle rear structure

Abstract

To secure rigidness of a bearing member against a load applied by a luggage loaded on a deck board while avoiding interference to a battery of the bearing member if the bearing member which is disposed in rear of the battery is pushed out to front side by rear collision.SOLUTION: A vehicle rear part structure comprises a battery 3 which is disposed under a deck board 1 which composes a floor of a luggage room of a vehicle rear part, a rear cross member 4 which extends in a vehicle width direction by being disposed in rear of the battery 3 and a bearing member 5 which supports the deck board 1 by being disposed in rear of the rear cross member 4. The bearing member 5 comprises a rib 51 with which a plurality of vertical walls 51a and a plurality of lateral walls 51b intersect in lattice-like shape on front side. The rib 51 is configured so that distance of a cross direction is secured between front end of a portion which is disposed in the rear of the battery 3 and rear end of the battery 3 so as not to interfere with the battery 3 even if the bearing member 5 is pushed out to a front side up to position which contacts to rear surface of the rear cross member 4 by rear collision.SELECTED DRAWING: Figure 2

Description

Technical Field

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[0001] The present invention relates to a vehicle rear structure in which a battery is disposed under a deck board that constitutes a floor of a luggage room at the rear of a vehicle.

Background Art

[0002] Patent Document 1 discloses a vehicle rear structure in which a battery is disposed under a deck board that constitutes a floor of a luggage room at the rear of a vehicle.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a vehicle in which a battery is mounted under a deck board that constitutes a floor of a luggage room at the rear of a vehicle, a support member that supports the rear end portion of the deck board is disposed behind the battery. However, when the support member is pushed forward due to a rear-end collision, there is a possibility that the support member may collide with the battery, causing the battery to move or be damaged. In order to avoid such interference of the support member with the battery, it is necessary to reduce the thickness of the support member in the front-rear direction. However, if the thickness of the support member in the front-rear direction is reduced over the entire width of the vehicle, the rigidity of the support member against the load applied by the luggage placed on the deck board will decrease.

[0005] Therefore, an object of the present invention is to provide a vehicle rear structure that can ensure the rigidity of a support member against a load applied by luggage placed on a deck board while avoiding interference of the support member with a battery when the support member disposed behind the battery is pushed forward due to a rear-end collision.

Means for Solving the Problems

[0006] The vehicle rear structure according to the present invention comprises a battery disposed beneath a deck board that constitutes the floor of the luggage compartment at the rear of the vehicle, a rear cross member disposed behind the battery and extending in the vehicle width direction, and a support member disposed behind the rear cross member and supporting the deck board, wherein the support member has ribs on its front side in which a plurality of vertical walls extending in the vertical and longitudinal directions and a plurality of horizontal walls extending in the vehicle width direction and longitudinal direction intersect in a grid pattern, and the ribs are characterized in that a longitudinal distance is secured between the front end of the portion disposed behind the battery and the rear end of the battery so as not to interfere with the battery even if the support member is pushed forward by a rear impact to a position where it contacts the rear surface of the rear cross member.

[0007] In one embodiment of the vehicle rear structure according to the present invention, the rib may be formed such that the front end of the portion located behind the battery is located behind the front end of the portion not located behind the battery.

[0008] In one embodiment of the vehicle rear structure according to the present invention, the support member may be supported by the rear cross member by a part of the support member contacting the upper surface of the rear cross member.

[0009] According to this embodiment, the ability to support the support member in a way that prevents it from tipping forward against the load applied by luggage placed on the deck board can be improved. [Effects of the Invention]

[0010] This invention makes it possible to ensure the rigidity of the support member against loads applied by luggage placed on the deck board, while avoiding interference between the support member and the battery when the support member, positioned behind the battery, is pushed forward by a rear impact. [Brief explanation of the drawing]

[0011] [Figure 1]This is a top view of the rear structure of a vehicle according to the embodiment of the disclosure. [Figure 2] This is a cross-sectional view along line AA in Figure 1. [Figure 3] This is a perspective view of the rear structure of the vehicle according to this embodiment. [Modes for carrying out the invention]

[0012] The vehicle rear structure 10 of the embodiment of this disclosure will be described below with reference to Figures 1 to 4. The arrows FR, UP, and RH shown in the following drawings indicate the forward direction (direction of travel), upward direction, and right direction of the vehicle, respectively. The opposite directions of each arrow FR, UP, and RH indicate the rear direction, downward direction, and left direction of the vehicle, respectively. When the directions front and back, left and right, and up and down are simply used in the description below, unless otherwise specified, they refer to the front and back in the front-rear direction of the vehicle, the left and right in the left-right direction (vehicle width direction), and the up and down direction of the vehicle.

[0013] Figure 1 is a top view of the vehicle rear structure 10. Figure 2 is a cross-sectional view of AA in Figure 1. However, Figure 2 shows the deck board 1 and back door 2 that constitute the floor of the luggage compartment at the rear of the vehicle, while Figure 1 omits the depiction of the deck board 1 and back door 2. As shown in Figures 1 and 2, the vehicle rear structure 10 includes a battery 3 arranged vertically below the deck board 1, a rear cross member 4 positioned behind the battery 3 and extending in the vehicle width direction, and a support member 5 positioned behind the rear cross member 4 and supporting the deck board 1. Both the rear cross member 4 and the support member 5 are located below the deck board 1. A rear panel 6 is positioned behind the support member 5.

[0014] As shown in Figure 1, the right toolbox 7R is positioned in front of and to the right of the battery 3, and the left toolbox 7L and intercooler spray tank 8 are positioned to the left of the battery 3. The material of the right toolbox 7R and the left toolbox 7L may be, for example, expanded polypropylene. Multiple recesses 71 that are recessed downwards are formed on the top surface of the left toolbox 7L, and tools such as a jack 72 can be stored in the recesses 71. Recesses 71 that are recessed downwards are also formed on the top surface of the right toolbox 7R, and tools such as accessories 73 for the jack 72 can be stored in the recesses 71.

[0015] The deck board 1 is attached to the vehicle body so as to be rotatable around its front end as a pivot point. Therefore, by manually lifting the rear end of the deck board 1, tools such as the jack 72 stored in the recesses 71 of the right toolbox 7R and left toolbox 7L can be retrieved, or booster cables (not shown) can be connected to the battery 3. When the rear end of the deck board 1 is lowered, the deck board 1 is placed on the right toolbox 7R, the left toolbox 7L and the support member 5, and is supported by the right toolbox 7R, the left toolbox 7L and the support member 5.

[0016] As shown in Figure 2, the battery 3 and support member 5 are mounted on the rear floor pan 9. A bumper reinforcement 11 is positioned behind the support member 5 and below the rear panel 6. A weatherstrip 61 is fixed to the rear of the rear panel 6. Figure 2 shows the back door 2 in the closed position. When the back door 2 is closed, the weatherstrip 61 contacts the back door 2, filling the gap between the back door 2 and the rear panel 6.

[0017] Figure 3 is a perspective view of the rear vehicle structure 10. To show the shape of the ribs 51 of the support member 5, Figure 3 omits the depiction of the deck board 1 and the right-side toolbox 7R. As shown in Figure 3, the support member 5 has ribs 51 on its front side, where multiple vertical walls 51a extending in the vertical and longitudinal directions and multiple horizontal walls 51b extending in the vehicle width direction and longitudinal direction intersect in a grid pattern. The support member 5 is made of resin material, and by having the grid-like ribs 51, it is possible to ensure rigidity against the load applied by luggage placed on the deck board 1.

[0018] In the portion of the rib 51 not located behind the battery 3, it extends forward to near the rear surface of the rear cross member 4. The rib 51 is formed such that the front end 52 of the portion located behind the battery 3 is positioned further back than the front end 53 of the portion not located behind the battery 3. Therefore, as shown in Figure 2, there is a distance between the front end 52 of the rib 51 located behind the battery 3 and the rear end of the battery 3.

[0019] When the vehicle is rear-ended, the bumper reinforcement 11 shown in FIG. 2 may deform, and the support member 5 may be pushed forward. When the support member 5 is pushed forward by such a rear-end collision, the front end 53 of the portion not disposed behind the battery 3 contacts the rear surface of the rear cross member 4. However, in the vehicle rear structure 10, even when the support member 5 is pushed forward to a position where the front end 53 of the portion not disposed behind the battery 3 contacts the rear surface of the rear cross member 4 due to a rear-end collision, the front end 52 of the portion disposed behind the battery 3 does not interfere with the battery 3, and the front-rear distance between the front end 52 of the portion disposed behind the battery 3 and the rear end of the battery 3 is ensured. Therefore, the vehicle rear structure 10 can avoid interference of the support member 5 with the battery 3 even when the support member 5 is pushed forward by a rear-end collision. Further, in the vehicle rear structure 10, the rib 51 is formed such that the front end 53 of the portion not disposed behind the battery 3 is disposed in front of the front end 52 of the portion disposed behind the battery 3, so that the rigidity of the support member 5 against the load applied by the luggage placed on the deck board 1 can be improved in the portion not disposed behind the battery 3.

[0020] At the right end of the support member 5, a mounting portion 54 protruding forward above the rear cross member 4 is provided. The mounting portion 54 is in contact with the upper surface 41 of the rear cross member 4. Also, on the portion of the support member 5 to the left of the battery 3, a mounting portion 55 protruding forward above the rear cross member 4 is provided. In FIG. 3, although it is hidden behind the battery 3 and not visible, the mounting portion 55 is also in contact with the upper surface 41 of the rear cross member 4. Further, although not shown, at the left end of the support member 5, a mounting portion 56 similar to the mounting portion 54 at the right end, protruding forward above the rear cross member 4 and in contact with the upper surface 41 of the rear cross member 4, is provided. By these three mounting portions 54 to 56 being in contact with the upper surface 41 of the rear cross member 4, the support member 5 is supported by the rear cross member 4.

[0021] As shown in FIG. 2, the upper surface 57 of the support member 5 projects above the rear cross member 4. Therefore, when a load is placed on the deck board 1, a load in the direction of causing the support member 5 to fall forward is applied. Since the three mounting portions 54 to 56 of the vehicle rear structure 10 abut on the upper surface 41 of the rear cross member 4 and the support member 5 is supported by the rear cross member 4, it is possible to improve the performance of supporting the support member 5 so as not to fall forward against the load applied by the load mounted on the deck board 1.

[0022] <Supplement of the embodiment> The vehicle rear structure of the present disclosure is not limited to the above-described form, and can be implemented in various forms within the scope of the gist of the present disclosure. For example, the battery may be arranged horizontally instead of vertically. Also, an intercooler spray tank may not be mounted. Further, the number of mounting portions of the support member may be other than three.

Explanation of reference numerals

[0023] 1 Deck board, 2 Back door, 3 Battery, 4 Rear cross member, 5 Support member, 6 Rear panel, 7L Left tool box, 7R Right tool box, 8 Intercooler spray tank, 9 Rear floor pan, 10 Vehicle rear structure, 11 Bumper reinforcement, 41 Upper surface, 51 Rib, 51a Vertical wall, 51b Horizontal wall, 52, 53 Front end, 54, 55, 56 Mounting portion, 57 Upper surface, 61 Weather strip, 71 Recess, 72 Jack, 73 Accessories.

Claims

1. The battery is located under the deck board that forms the floor of the luggage compartment at the rear of the vehicle, A rear cross member positioned behind the aforementioned battery and extending in the vehicle width direction, It comprises a support member positioned behind the rear cross member and supporting the deck board, The support member has ribs on its front side in which a plurality of vertical walls extending in the vertical and longitudinal directions and a plurality of horizontal walls extending in the vehicle width direction and longitudinal direction intersect in a grid pattern. The rear vehicle structure is characterized in that the rib is positioned such that it does not interfere with the battery even when the support member is pushed forward by a rear impact to a position where it contacts the rear surface of the rear cross member, by ensuring a longitudinal distance between the front end of the portion located behind the battery and the rear end of the battery.

2. The vehicle rear structure according to claim 1, The vehicle rear structure is characterized in that the rib is formed such that the front end of the portion located behind the battery is positioned behind the front end of the portion not located behind the battery.

3. The vehicle rear structure according to claim 1 or 2, A rear vehicle structure characterized in that a portion of the support member abuts against the upper surface of the rear cross member, thereby supporting the support member on the rear cross member.

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