JP2011126439A - Structure of vehicle with battery - Google Patents

Abstract

A battery-equipped vehicle structure having a high degree of freedom in assembling a battery and a seat frame to a vehicle body is obtained.
A vehicle rear structure is disposed on a floor panel, and includes a battery fixed to a vehicle body at a front cross fixing portion 30A of a left front bracket 30 and an L-shaped bracket 34A of a rear bracket 34, and a battery 26 And a seat frame 22 fixed to the vehicle body via a leg fixing portion 30B of the left front bracket 30 and a center bracket 34B of the rear bracket 34. The seat frame 22 supports the seat cushion 20 </ b> A of the rear seat 20.
[Selection] Figure 1

Description

  The present invention relates to a structure of a vehicle-equipped vehicle.

  2. Description of the Related Art A vehicle battery mounting structure is known in which a battery box supported on a floor via a battery mount is disposed between the floor and a rear seat. (For example, refer to Patent Documents 1 and 2). There is also known an automobile in which a battery is disposed between a floor and a front seat and the battery is held on the front seat (see, for example, Patent Document 3).

JP 2001-113959 A JP 2009-029159 A JP 2003-182377 A

  However, the conventional techniques as described above have room for improvement with respect to the assembly of the battery and the seat frame to the vehicle body.

  An object of the present invention is to obtain a structure of a battery-equipped vehicle having a high degree of freedom in assembling a battery and a seat frame with respect to a vehicle body.

  According to a first aspect of the present invention, there is provided a battery-equipped vehicle structure, wherein the battery is disposed on the vehicle floor and fixed to the vehicle body at the first fixing portion, and at least a part of the fixing portion for the vehicle body is interposed via the battery. A second fixed portion fixed to the vehicle body, and a seat frame that supports a seat cushion disposed on the upper side in the vehicle vertical direction with respect to the battery.

  In the structure of the battery-equipped vehicle according to the first aspect, the battery is fixed to the vehicle body at the first fixing portion, and the battery and the seat frame are fixed to each other by the second fixing portion. For this reason, for example, the battery is fixed to the vehicle body by the first fixing portion and then assembled to the vehicle body alone, and then the seat frame is assembled to the vehicle body, or the battery and the seat frame sub-assembled by fixing at the second fixing portion are combined. It is possible to assemble it to the vehicle body in one body (any assembly method can be selected).

  Thus, in the structure of the battery-equipped vehicle according to the first aspect, the degree of freedom in assembling the battery and the seat frame with respect to the vehicle body is high.

  The structure of the battery-equipped vehicle according to a second aspect of the invention is the structure of the battery-equipped vehicle according to the first aspect, wherein a plurality of the seat frames are provided spaced apart in the vehicle width direction on the front end side in the vehicle front-rear direction. The battery has a front bracket provided on a front end side in the vehicle front-rear direction, and the front bracket has at least one of the plurality of legs as the second fixing portion. A leg fixing portion is provided to which a lower end portion of the leg portion in the vehicle vertical direction is fixed.

  In the structure of the battery-equipped vehicle according to the second aspect, the leg fixing portion to which at least a part of the lower end portions of the plurality of leg portions of the seat frame is fixed is provided on the front bracket located at the front lower portion of the battery. For this reason, for example, compared with the structure where a seat frame is fixed to the bracket provided in the front upper part of the battery, the attachment or detachment operation | work of the seat frame with respect to a battery is easy.

  The structure of the battery-equipped vehicle according to a third aspect of the invention is the structure of the battery-equipped vehicle according to the second aspect, wherein the seat frame extends in the vehicle width direction on the rear end side in the vehicle front-rear direction. The battery has a rear bracket provided on a rear end side in the vehicle front-rear direction, and the rear bracket is fixed to the rear bracket as the second fixing portion. A side frame fixing part is provided.

  In the battery-equipped vehicle structure according to the third aspect, the battery and the seat frame are stably coupled via the front and rear brackets.

  A battery-equipped vehicle structure according to a fourth aspect of the present invention is the battery-equipped vehicle structure according to the third aspect, wherein a pair of left and right body skeletons extending in the vehicle front-rear direction on both outer sides in the vehicle width direction relative to the battery Side members, a first cross member serving as a vehicle body skeleton that extends in the vehicle width direction and spans the pair of cross members, and is provided on the vehicle floor. A second cross member serving as a vehicle body skeleton extending in the vehicle width direction on the rear side in the vehicle longitudinal direction with respect to the cross member and spanning the pair of cross members, and the front bracket includes the first cross member. The first cross fixing member fixed to the first cross member is provided as the fixing member of the first cross member, and the second cross member is provided as the first fixing member on the rear bracket. Second cross fixing portion fixed is provided.

  In the structure of the battery-equipped vehicle according to claim 4, the battery (most part) is disposed so as to be surrounded by a rectangular frame-shaped vehicle body skeleton including front and rear cross members and left and right side members in a plan view. . For this reason, the battery is protected by the above-described rectangular frame-shaped vehicle body skeleton in the event of a vehicle collision. In particular, with respect to a side collision of the vehicle, the side collision load is distributed to the front and rear cross members and the vehicle body deformation is suppressed, so that the battery protection performance is high.

  The structure of the battery-equipped vehicle according to the invention of claim 5 is the structure of the battery-equipped vehicle according to claim 4, wherein a fuel tank is disposed below the vehicle floor in the vehicle vertical direction, and the fuel tank is A body portion disposed on the rear side in the vehicle front-rear direction with respect to the second cross member so that at least a portion overlaps the battery in a front view, and at least a portion overlaps the battery in a plan view. Thus, the main body portion is configured to have a projecting portion that projects from the lower end portion in the vehicle vertical direction to the front side in the vehicle front-rear direction.

  In the battery-equipped vehicle structure according to the fifth aspect, the battery is positioned in front of the main body of the fuel tank and above the overhanging portion. As a result, in the structure of the vehicle equipped with the battery, it is possible to arrange the battery and the fuel tank compactly in the vertical direction of the vehicle as compared with the configuration in which the battery and the fuel tank are simply stacked one above the other. Compared to the configuration arranged side by side, a compact arrangement in the vehicle front-rear direction is possible. That is, in this aspect, while ensuring the capacity | capacitance of a battery and a fuel tank, these can be arrange | positioned compactly up and down and up and down as a whole.

  The structure of a battery-equipped vehicle according to a sixth aspect of the present invention is the structure of the battery-equipped vehicle according to any one of the first to fifth aspects, wherein the battery is placed on the upper side in the vehicle vertical direction. The panel member which covers from is fixed.

  In the structure of the battery-equipped vehicle according to the sixth aspect, the seat load of the seat cushion can be supported by the panel member and can be distributed to the seat frame. For this reason, interference between the seat cushion and the battery at the time of sitting is prevented or effectively suppressed.

  A battery-equipped vehicle structure according to a seventh aspect of the present invention is the battery-equipped vehicle structure according to the sixth aspect, wherein the seat cushion is engaged with an engaging member provided on the panel member.

  In the battery-equipped vehicle structure according to the seventh aspect, the seat cushion can be easily assembled to the seat frame.

  As described above, the battery-equipped vehicle structure according to the present invention has an excellent effect that the degree of freedom in assembling the battery and the seat frame with respect to the vehicle body is high.

1 is a perspective view schematically showing the structure of a battery-equipped vehicle according to an embodiment of the present invention. It is a disassembled perspective view which isolate | separates and shows a seat frame which shows typically the structure of the battery-equipped vehicle which concerns on embodiment of this invention. It is sectional drawing in alignment with the 3-3 line of FIG. 1 of the structure of the battery mounting vehicle which concerns on embodiment of this invention. It is a sectional side view showing typically the vehicle rear part structure concerning the embodiment of the present invention. It is a perspective view which shows the example by which the battery and seat frame which comprise the structure of the battery mounting vehicle which concerns on embodiment of this invention were made into subassembly. It is a figure which shows the structure of the battery mounting vehicle which concerns on embodiment of this invention, Comprising: (A) is a side view which shows the state before a rear collision, (B) is a side view which shows the deformation | transformation state accompanying a rear collision. It is a sectional side view showing typically the vehicle rear part structure concerning the 1st comparative example with the embodiment of the present invention. It is a sectional side view showing typically the vehicle rear part structure concerning the 2nd comparative example with the embodiment of the present invention.

  A vehicle rear structure 10 of a hybrid vehicle to which a structure of a battery-equipped vehicle according to an embodiment of the present invention is applied will be described with reference to FIGS. First, the structure of the rear part of the vehicle body constituting the vehicle rear part structure 10 will be described, and then the mounting structure of the battery 26, the shape and arrangement of the fuel tank 56 will be described. In addition, the arrow FR described appropriately in the figure is the forward direction in the vehicle longitudinal direction, the arrow UP is the upward direction in the vehicle vertical direction, the arrow LH is the vehicle left side which is one side in the vehicle width direction, and the arrow RH is the vehicle width direction. The vehicle right side which is one side of each is shown. In the following description, when using the front-rear direction and the up-down direction, the front-rear direction and the up-down direction of the vehicle are used as a reference.

(Structure of the rear part of the car body)
FIG. 1 shows a schematic configuration of the vehicle rear structure 10 in a perspective view, and FIG. 2 shows an exploded perspective view of the schematic configuration of the vehicle rear structure 10 with a partial configuration separated. ing. As shown in these drawings, the vehicle body constituting the vehicle rear structure 10 includes a rear side member 12 as a pair of left and right side members. The left and right rear side members 12 are skeleton members that are long in the vehicle longitudinal direction.

  Specifically, each rear side member 12 is formed in a cross-sectional hat shape that opens upward, and is joined to a floor panel 14 (see FIG. 3) constituting the vehicle floor from the lower surface side. And has a skeleton structure with a closed cross section. In addition, in FIG.1 and FIG.2, illustration of the floor panel 14 is abbreviate | omitted. Further, the rear side member 12 is not limited to a configuration that opens upward, and may be configured to form a skeleton structure with a closed cross section by joining an inner panel and an outer panel that open outward in the vehicle width direction, for example. In this case, for example, the floor panel 14 can be joined to the upper wall of the inner panel.

  Each rear side member 12 has a rear portion 12R located on the inner side and the upper side in the vehicle width direction with respect to the front portion 12F. The front portion 12F and the rear portion 12R, each extending in the vehicle front-rear direction, are smoothly connected by a kick portion 12K. The front end portions of these rear side members 12 are connected to different end portions in the vehicle width direction of a center cross member 16 as a first cross member that is elongated in the vehicle width direction. In other words, the center cross member 16 spans between the front end portions of the rear side members 12.

  3 and 5, the center cross member 16 has a substantially rectangular shape by joining the cross member upper 16U and the cross member lower 16L. It has a closed cross-sectional structure (skeleton structure). A front end portion of each rear side member 12 and both end portions in the vehicle width direction of the center cross member 16 are connected to a rear end portion of a rocker which is a vehicle body frame (not shown). In this embodiment, the floor panel 14 has a divided structure including a front floor panel 14F positioned on the front side with respect to the center cross member 16 and a center floor panel 14C positioned on the rear side with respect to the center cross member 16. . A rear floor panel 14R is continuous behind the rear end (step 14B described later) of the center floor panel 14C.

  Further, in the vehicle rear structure 10, as shown in FIGS. 2 and 3, the kick portions 12K of the rear side members 12 are bridged over a rear cross member 18 as a second cross member. The rear cross member 18 bridges substantially intermediate portions in the front-rear direction of the left and right kick portions 12K. In this embodiment, both ends of the rear cross member 18 in the vehicle width direction are fastened and fixed to the upper surface of the kick portion 12K.

  As shown in FIG. 3, the rear cross member 18 is joined to the floor panel 14 from the upper surface side so as to straddle the step portion 14 </ b> B formed in the rear portion (center floor panel 14 </ b> C) of the center cross member 16 in the floor panel 14. Has been. Thus, the rear cross member 18 forms a skeleton structure with a closed cross section with the floor panel 14 (step 14B). In this embodiment, the rear cross member 18 has a narrow closed cross section in the vertical direction behind the stepped portion 14B, and a wide closed cross section in the vertical direction forward of the stepped portion 14B. The upper surface of the rear cross member 18 is positioned above the upper surface of the center cross member 16.

  Although not shown, the kick portions 12K of the left and right rear side members 12 support the front end of the trailing arm that constitutes the rear suspension so as to be swingable. As a result, a space in which the intermediate beam 55 (see FIG. 4) that constitutes the rear suspension is vertically moved is secured behind the rear cross member 18 on the lower side of the floor panel 14 by connecting the left and right trailing arms. It is configured. This point will be described later together with the configuration of the fuel tank 56 (see FIG. 4).

  Further, in the vehicle rear structure 10, a rear seat 20 is provided on the upper side of the step portions 14 </ b> A and 14 </ b> B in the floor panel 14. The rear seat 20 includes a seat cushion 20A on which an occupant P is seated, and a seat back 20B having a lower end connected to the rear end of the seat cushion 20A. In the hybrid vehicle according to this embodiment, the space behind the seat back 20B is a luggage compartment LR (see FIG. 4). The seat cushion 20 </ b> A has a front end position substantially coincident with a position in the front-rear direction of the center cross member 16, and a rear end position positioned rearward of the rear cross member 18.

  The seat cushion 20A is configured by covering the seat frame 22 with a cushion material (pad) and a skin (not shown). As shown in FIGS. 2 and 3, a seat plate 24 as a panel member is disposed between the seat frame 22 and the seat cushion 20A. Specific structures of the seat frame 22 and the seat plate 24 will be described in detail later.

(Battery mounting structure)
As shown in FIGS. 1 to 3, a battery 26 is mounted below the seat cushion 20 </ b> A constituting the rear seat 20. The battery 26 is a storage battery (not shown) that stores electric power for driving an electric motor (not shown) for running the hybrid vehicle. The battery 26 is formed in a substantially rectangular parallelepiped shape that is long in the vehicle width direction as a whole, and is configured by housing a battery body (both not shown) in a battery case.

  In this embodiment, the battery 26 is disposed between the seat frame 22 and the floor panel 14 (on the upper side of the floor panel 14), and is substantially disposed so as to overlap (cover) the seat cushion 20A in a plan view. ing. More specifically, the battery 26 has a front surface 26A disposed immediately above the center cross member 16, and a rear surface 26B disposed immediately before the rear cross member 18 (the step portion 14B of the floor panel 14). ing.

  Accordingly, as shown in FIGS. 1 and 2, the battery 26 has a rectangular frame RF (outside wall) formed of the left and right rear side members 12, the center cross member 16, and the rear cross member 18 in plan view. The structure is surrounded by four sides. Further, as shown in FIG. 1, the battery 26 is disposed on the lower side of the frame body 28 constituting the seat frame 22 (directly below a front frame 28 </ b> F described later).

  As described above, in the vehicle rear structure 10, the battery 26 is disposed in the battery housing space Rb (see FIGS. 3 and 4) surrounded by the rectangular frame RF that is the vehicle body skeleton and the frame body 28 of the seat frame 22. ing. The battery 26 is configured to be disposed as far forward and upward as possible in the vehicle body while ensuring the occupant P's heel space and the thickness of the cushion material constituting the seat cushion 20A. This point will be described later together with the operation of this embodiment.

  The battery 26 described above is fastened and fixed to the center cross member 16 and the rear cross member 18 by fastening means 25 comprising bolts and nuts. Specifically, the battery 26 is provided on the left front bracket 30 provided on one side (left side) of the front lower end portion in the vehicle width direction and on the other side (right side) of the front lower end portion in the vehicle width direction. The right front bracket 32 and the rear bracket 34 provided at the center of the upper end portion in the vehicle width direction are provided.

  The battery 26 is fastened to the left portion of the center cross member 16 by the fastening means 25 in the left front bracket 30, and fastened to the right portion of the center cross member 16 by the fastening means 25 in the right front bracket 32. The bracket 34 (L-shaped bracket 34A to be described later) is fastened by fastening means 25 in the vicinity of the center of the rear cross member 18. The left front bracket 30 is raised between the two front cross fixing portions 30A as the first cross fixing portions fastened and fixed by the fastening means 25 at two locations separated in the vehicle width direction, and between the two front cross fixing portions 30A. And a leg fixing portion 30B formed as described above. A leg portion 38 (left leg portion 38), which will be described later, constituting the seat frame 22 is fixed to the leg fixing portion 30B.

  Each of the rear brackets 34 has a substantially “L” shape, and a center bracket 34B that spans a pair of L-shaped brackets 34A that are spaced apart from each other in the vehicle width direction and the left and right L-shaped brackets 34A. Are joined by spot welding or the like. The rear bracket 34 is fastened and fixed to the battery 26 (battery case) of the left and right L-shaped brackets 34A by fastening means 36 (see FIG. 3) made of bolts and nuts, and the left and right L-shaped brackets 34A. The rear cross member 18 is fastened and fixed by fastening means 25. In this state, the center side portion of the center bracket 34 </ b> B excluding the coupling portion with the L-shaped bracket 34 </ b> A is disposed above the rear cross member 18 and spaced from the rear cross member 18.

  The portions fastened and fixed to the vehicle body by the fastening means 25 in the two L-shaped brackets 34A of the two cross fixing portions front side 30A, the right front side bracket 32, and the rear side bracket 34 of the left front bracket 30 described above are the first in the present invention. It corresponds to one fixed part. That is, the left front bracket 30 having the leg fixing portion 30B corresponds to the front bracket and the first cross fixing portion in the present invention, and the L-shaped bracket 34A fixed to the rear cross member 18 corresponds to the second cross fixing portion.

  The seat frame 22 has a part of the fixing portion to the vehicle body joined to the vehicle body via the battery 26, and the remaining part of the seat frame 22 is joined directly to the vehicle body. Specifically, the seat frame 22 is configured such that a front frame 28F extending in the vehicle width direction and an outer end in the vehicle width direction of a rear frame 28R as a rear frame are connected to a pair of left and right side frames 28S. A frame body 28 is provided. In this embodiment, the rear frame 28R has a two-divided structure that is separated into left and right.

  A pair of left and right leg portions 38 are suspended from the front frame 28F of the frame body 28 so as to be spaced apart in the vehicle width direction. The left and right leg portions 38 are respectively arranged on the opposite side (both outer sides) of the battery 26 in the vehicle width direction. Further, the seat frame 22 is configured to have a pair of left and right flange portions 22A that protrude outward in the vehicle width direction from the connecting portions of the left and right side frames 28S and the rear frame 28R.

  In the seat frame 22, the lower end of the left leg portion 38 is fastened and fixed to the upper surface side of the leg fixing portion 30B of the left front bracket 30 by fastening means 40 made of bolts and nuts. Further, the inner ends in the vehicle width direction of the left and right rear frames 28R are fastened and fixed from the upper side of the vehicle by the fastening means 40 at positions spaced in the vehicle width direction on the upper surface side of the center bracket 34B constituting the rear bracket 34. Has been. The portion fastened and fixed to the battery 26 by the fastening means 40 in the leg fixing portion 30B of the left front bracket 30 and the center bracket 34B of the rear bracket 34 corresponds to the rear frame fixing portion which is the second fixing portion in the present invention. To do.

  On the other hand, the seat frame 22 is fastened and fixed to the right portion of the center cross member 16 with respect to the battery 26 at the lower end of the right leg 38 by fastening means 42 made of bolts and nuts. Further, the seat frame 22 is fastened and fixed by fastening means 42 at the left and right flange portions 22 </ b> A at the connecting portion with the left and right rear side members 12 that are the ends in the vehicle width direction of the rear cross member 18. The lower and lower ends of the right leg portion 38 and the right and left flange portions 22A are fastened and fixed to the vehicle body frame by the fastening means 42 as third fixing portions different from the first fixing portion and the second fixing portion of the present invention. Can be caught.

  The seat frame 22 is provided with a seat plate 24 that covers the battery housing space Rb (battery 26) from above as described above. The seat plate 24 in this embodiment is divided into a plurality (three) in the vehicle width direction. Specifically, the seat plate 24 includes a center seat plate 24A in which a vehicle width direction center portion of the front frame 28F and a vehicle width direction inner end portion (center bracket 34B) of the left and right rear frames 28R are bridged back and forth. The center seat plate 24A includes a pair of outer seat plates 24B supported by a front frame 28F, a rear frame 28R, and a side frame 28S on the left and right sides. The size and shape of the seat plate 24 and the material (in this embodiment, steel) are determined so that the seating load from the seat cushion 20A is supported and transmitted (dispersed) to the seat frame 22.

  Further, a plurality (two in this embodiment) of clip portions (latch portions) 46 as locking members are provided in the vicinity of the front ends of the left and right outer sheet plates 24B. Each clip portion 46 is configured to receive a substantially “U” -shaped striker-like locking portion 48 (see FIG. 3) provided in the seat cushion 20 </ b> A in a state of retaining. Each of the clip portions 46 is in a release state that allows the locking portion 48 to be removed when the release protrusion (not shown) is elastically deformed. As such a clip structure, various known structures can be adopted, and the description thereof will be omitted.

  As shown in FIGS. 1 and 2, the vehicle rear structure 10 includes a high voltage cable (not shown) for electrically connecting the battery 26 to the electric motor, the inverter, and the like. The high-voltage cable in this embodiment is connected to the battery 26 on the right side (one side in the vehicle width direction) with respect to the battery 26 in the battery housing space Rb. The high-voltage cable passes through the floor panel 14 forming the bottom surface of the battery housing space Rb, is led out below the floor, and is led to an electric motor, an inverter, and the like arranged on the front side.

  Further, as shown in FIGS. 1 and 2, in the vehicle rear structure 10, a cooling fan unit (fan motor) 54 for cooling the battery 26 is disposed in the battery housing space Rb. The cooling fan unit 54 is a centrifugal fan (sirocco fan) that blows air that flows in from the front side toward the battery 26 that is located on the inner side in the vehicle width direction. In this embodiment, the cooling fan unit 54 is disposed on the left side (the side opposite to the high-voltage cable) with respect to the battery 26 in the battery housing space Rb.

(Fuel tank shape and arrangement)
In the vehicle rear structure 10, as shown in FIG. 4, a fuel tank 56 is disposed below the rear seat 20 and below the floor panel 14. The fuel tank 56 stores liquid fuel supplied to an internal combustion engine (not shown) such as gasoline or light oil. The internal combustion engine performs at least one of the functions of generating driving power for the hybrid vehicle and charging the battery 26.

  The fuel tank 56 includes a thick main body (general part) 56A disposed on the rear side of the battery 26 and a thin overhang 56B projecting forward from the lower end of the main body 56A. It is comprised and is arrange | positioned in proximity to the floor panel 14. That is, the fuel tank 56 includes an overhanging portion 56B having a relatively low height in the vehicle vertical direction and a main body portion 56A having a high height in the vehicle vertical direction with respect to the overhanging portion 56B. . The upper portion of the main body 56A is disposed so as to overlap the back surface 26B of the battery 26 (on the rear cross member 18) in a front view. In this embodiment, as shown in FIG. 1, the rear cross member 18 is inserted into the left and right rear side members through a space between the back surface 26B of the battery 26 and the front surface 56Af facing the front side in the vehicle front-rear direction in the upper portion of the main body 56A. It spans between twelve.

  On the other hand, the overhang portion 56 </ b> B is disposed below the battery 26. More specifically, the overhang portion 56B is disposed so as to overlap the lower surface 26C of the battery 26 in plan view. Further, the overhang portion 56B is arranged such that the upper portion thereof overlaps the center cross member 16 in a front view.

  The fuel tank 56 is supported by the vehicle body via a support structure (not shown). As this support structure, for example, direct fastening to the vehicle body or indirect fastening via a bracket or the like, suspension support by a tank band or the like can be employed. In this embodiment, the fuel tank 56 is supported (fixed) by fastening to the vehicle body with a vibration-proof rubber interposed between the fuel tank 56 and the vehicle body. In this embodiment, the fuel tank 56 includes a left and right rear side member 12, a center cross member 16, and a cross member (not shown) that bridges the left and right rear side members 12 behind the rear cross member 18 in a plan view. Surrounded by arrangement.

  As shown in FIG. 4, the rear end of the fuel tank 56 reaches above the intermediate beam 55 constituting the rear suspension. Therefore, a beam escape portion 56C that allows the intermediate beam 55 of the rear suspension to move up and down is formed behind the main body portion 56A in the fuel tank 56. The intermediate beam 55 is displaced (oscillated) between a position indicated by a solid line in FIG. 3 and a position indicated by a two-dot chain line in the beam escape portion 56C. In this embodiment, the fuel tank 56 has a rear portion 56D located above and behind the beam escape portion 56C.

  Next, the operation of this embodiment will be described.

  In the vehicle rear structure 10 having the above configuration, a battery 26 is disposed between the floor panel 14 and the seat cushion 20A. For this reason, since the battery 26 is not mounted in the luggage compartment LR, it is possible to secure the luggage compartment capacity and effectively use the luggage space (including seat arrangement).

  Here, in the vehicle rear structure 10, the battery 26 is directly fastened and fixed to the vehicle body at the left front bracket 30 and the left and right L-shaped brackets 34 </ b> A, and the seat frame 22 is the battery among the fixed parts to the vehicle body. 26 (leg fixing part 30B, center bracket 34B). For this reason, in the vehicle rear structure 10, the battery 26 and the seat frame 22 are integrated (sub-assembly shown in FIG. 5) at the leg fixing portion 30B and the center bracket 34B and assembled to the vehicle body. An assembly form (method) in which the seat frame 22 is fixed to the vehicle body after the 26 is fixed to the vehicle body can be taken.

  Thus, in the vehicle rear portion structure 10, the degree of freedom in assembling the battery 26 and the seat frame 22 with respect to the vehicle body is high.

  In the vehicle rear structure 10, the battery 26 is fastened and fixed to the center cross member 16 at the left front bracket 30 and is fastened and fixed to the rear cross member 18 at the rear bracket 34. In other words, the battery 26 is directly fastened and fixed to the vehicle body at the front and rear portions thereof. For this reason, the battery 26 is stably supported with respect to the vehicle body.

  Further, in the vehicle rear structure 10, the seat frame 22 is fastened from the upper side of the vehicle at the lower end of the left leg 38 and the inner ends in the vehicle width direction of the left and right rear frames 28R. The battery 26 can be attached to and detached from the vehicle body independently. As a result, as shown in FIG. 2, the rear seat 20, that is, the seat cushion 20 </ b> A and the seat frame 22 can be removed while the battery 26 is mounted on the floor of the vehicle body, and the battery 26 can be maintained.

  In this case, after the locking state of the locking portion 48 by the clip portion 46 is released and the seat cushion 20A is removed from the seat frame 22, the fastening means 40 for fastening the leg portion 38 and the rear frame 28R are fastened. And the fastening of the fastening means 42 for fastening the right leg 38 and the left and right flanges 22A are released, and the seat frame 22 is removed from the battery 26 (independent of the vehicle body).

  Further, in the vehicle rear structure 10, the seat frame 22 is configured to include the frame main body 28 disposed above the battery 26, so that the battery 26 is protected against a load from above. Therefore, for example, the battery 26 is protected against a load (acceleration) of a seated occupant P of the rear seat 20 and a load placed on the rear seat 20.

  In particular, in the vehicle rear structure 10, since the seat frame 22 is provided with the seat plate 24 that covers the battery housing space Rb from above, the seat frame 24 supports a load such as a seating load from the seat cushion 20 </ b> A. 22 can be dispersed. For this reason, the seat cushion 20A and the battery 26 are prevented from interfering with each other at the time of sitting or the like, or more preferably suppressed.

  In the vehicle rear structure 10, since the clip portion 46 is provided on the seat plate 24, the seat cushion 20 </ b> A provided with the locking portion 48 can be easily attached to and detached from the seat frame 22. And since each clip part 46 is arrange | positioned at the front-end side of the seat plate 24, the attachment or detachment operation | work of the seat cushion 20A is easy. On the other hand, since the plurality of clip portions 46 are provided, the state in which the seat cushion 20A is held by the seat frame 22 is easily maintained, for example, in the event of a hybrid vehicle collision.

  Here, in the vehicle rear structure 10, a battery 26 is disposed below the rear seat 20, a main body portion 56 </ b> A (main body) of the fuel tank 56 is disposed behind the battery 26, and a fuel tank is disposed below the battery 26. 56 projecting portions 56B are arranged. Thus, in the vehicle rear structure 10, the fuel tank 56 has the main body portion 56 </ b> A disposed behind the battery 26 and the overhang portion 56 </ b> B disposed below the battery 26. Contributes to a compact configuration up and down. This point will be described in comparison with the comparative example shown in FIGS.

  FIG. 7 shows a vehicle rear structure 100 according to a first comparative example in which a battery 102 and a fuel tank 104 are arranged in the front-rear direction with a stepped portion 106A of the floor panel 106 interposed therebetween. The vehicle rear structure 100 does not have the rear cross member 18, and the center cross member 108 has a high cross-sectional shape in the vertical direction with respect to the center cross member 16 in order to ensure required vehicle body rigidity and strength. Therefore, a battery housing recess 110 in which the floor panel 106 is recessed is formed behind the center cross member 108, and the battery 102 is disposed in the battery housing recess 110, that is, behind the center cross member 108. Further, the fuel tank 104 that does not have a fuel storage portion corresponding to the overhang portion 56B is formed to have a longer front-rear length than the main body portion 56A of the fuel tank 56 in order to ensure a required capacity. The battery 102 has the same size and shape as the battery 26. In the vehicle rear structure 100 according to the first comparative example, the battery 102 and the fuel tank 104 are arranged in front of and behind the rear wheel supported by the rear suspension. It will be long. That is, the vehicle body of the hybrid vehicle becomes longer in the front-rear direction.

  On the other hand, in the vehicle rear portion structure 10 according to the present embodiment, the protruding portion 56B of the fuel tank 56 is disposed below the battery 26. For this reason, the front-rear length of the main body portion 56 </ b> A disposed behind the battery 26 in the fuel tank 56 can be made shorter than that of the fuel tank 104 while ensuring the required capacity of the fuel tank 56. In the vehicle rear structure 10, by providing the rear cross member 18, the cross section of the center cross member 16 can be set small vertically. Thus, in the vehicle rear structure 10, the battery 26 can be positioned immediately above the center cross member 16, that is, the front end portion of the battery 26 can be disposed within the range of the front and rear width of the center cross member 16. For this reason, the battery 26 can be disposed in front of the battery 102 of the vehicle rear structure 100.

  As described above, in the vehicle rear portion structure 10 according to the present embodiment, the wheel base can be shortened compared to the vehicle rear portion structure 100 according to the first comparative example, which contributes to downsizing of the hybrid vehicle in the front-rear direction.

  FIG. 8 shows a vehicle rear structure 150 according to a second comparative example in which a battery 152 and a fuel tank 154 are arranged vertically with a floor panel 156 interposed therebetween. The vehicle rear structure 150 does not have the rear cross member 18, and the center cross member 158 has a high cross-sectional shape in the vertical direction with respect to the center cross member 16 in order to ensure required vehicle body rigidity and strength. In the vehicle rear structure 150, a battery 152 having the same size and shape as the battery 26 is disposed on the floor panel 156 behind the center cross member 158. Further, in the vehicle rear structure 150, the fuel tank 154 has a longitudinal length equivalent to the longitudinal length of the fuel tank 56 (excluding the rear portion 56D), and the vertical height of the fuel tank 154 is extended to ensure a required capacity. It is larger than the vertical height of the portion 56B.

  In the vehicle rear structure 150 according to the second comparative example, since the battery 152 and the fuel tank 154 are arranged one above the other, the height H between the hip point HP of the rear seat occupant and the lower surface 154A of the fuel tank 154 is high. It becomes relatively large. For this reason, in the vehicle rear portion structure 150, the height Hhp of the hip point HP with respect to the floor surface is increased. Accordingly, when the roof is moved upward in order to secure the reduced head clearance, the height of the applied hybrid vehicle increases. On the other hand, for example, when the floor panel 156 behind the center cross member 158 is moved downward to keep the height Hhp of the hip point HP low, the fuel tank 154 is relatively moved downward. In this configuration, in order to ensure the minimum ground clearance LC from the road surface R to the lower surface 154A of the fuel tank 154, the vehicle height of the hybrid vehicle eventually becomes high.

  In contrast, in the vehicle rear structure 10, a thin (flat) protruding portion 56 </ b> B of the fuel tank 56 than the fuel tank 154 is disposed below the battery 26. Therefore, the height H from the lower surface 56E of the fuel tank 56 to the hip point HP in the rear seat 20 can be kept low while ensuring the required capacity of the fuel tank 56. In the vehicle rear structure 10, the overhanging portion 56 </ b> B is disposed so as to overlap the center cross member 16 in a front view. That is, the protruding portion 56B of the fuel tank 56 is disposed using the space behind the center cross member 16 in which the battery 26 (the front portion) is disposed above. Thus, in the vehicle rear structure 10, the height H, that is, the hip point HP of the rear seat occupant can be set low in the configuration in which the battery 26 is positioned directly above the center cross member 16.

  As described above, in the vehicle rear structure 10 according to the present embodiment, the vehicle height can be lowered as compared with the vehicle rear structure 150 according to the second comparative example, which contributes to downsizing of the hybrid vehicle in the vertical direction.

  And the vehicle rear part structure 10 contributes to the weight reduction and fuel consumption reduction of the applied hybrid vehicle by size reduction of the front-back direction mentioned above and size reduction of an up-down direction. That is, the vehicle rear structure 10 can satisfy the required capacity of the fuel tank and the ensured comfort in a vehicle type (hybrid vehicle) such as a sedan, a wagon, and a hatchback having a relatively low vehicle height. In particular, even for a compact car having a comparatively short length in the front-rear direction, a practical package (layout of parts and the like) can be realized while ensuring the required capacity of the fuel tank and habitability.

  Further, in the vehicle rear structure 10, the battery 26 is surrounded by a rectangular frame RF including the left and right rear side members 12, the center cross member 16, and the rear cross member 18 in plan view. For this reason, when a collision occurs in the hybrid vehicle to which the vehicle rear portion structure 10 is applied, the collision load is directly prevented from acting on the battery 26, and the battery 26 is well protected.

  In particular, since the center cross member 16 and the rear cross member 18 are disposed before and after the battery 26, the battery 26 is well protected against a side collision of the hybrid vehicle. That is, for example, when a pole or the like collides with the vicinity of the rear seat 20 (when a load is locally input), the side impact load is distributed to the front and rear center cross members 16 and the rear cross member 18. The dispersion of the side impact load based on the effective arrangement of the center cross member 16 and the rear cross member 18 (transmission to the anti-collision side) suppresses body deformation on the collision side on both the front and rear sides of the battery 26, as described above. The battery 26 is well protected.

  Moreover, in the vehicle rear structure 10, the seat frame 22 is fastened and fixed to the center cross member 16 and the rear cross member 18. For this reason, the input load accompanying the side collision of the hybrid vehicle is supported by the seat frame 22, and this also protects the battery 26 against the side collision. Further, the side impact load (including the load input to the rectangular frame RF and the load input to the seat frame 22) is outside the vehicle body in the vehicle width direction with respect to the battery 26 (left and right flange portions 22A, leg portions 38). 28 is also dispersed and transmitted to the anti-collision side, so that the protection performance of the battery 26 by the load distribution described above is also improved.

  In the vehicle rear structure 10, the protection performance against the side collision of the seated occupant of the rear seat 20 is improved as the protection performance against the side collision of the battery 26 is improved. Further, in the vehicle rear structure 10, since the rear cross member 18 is disposed between the back surface 26B of the battery 26 and the main body portion 56A front surface 56Af of the fuel tank 56, the rear cross member 18 shown in FIGS. The protection performance of the fuel tank 56 against side collision is improved as compared with the vehicle rear structures 100 and 150 according to the comparative example that is not provided.

  Further, in the vehicle rear structure 10, the battery 26 is fastened and fixed to each of the center cross member 16 and the rear cross member 18. For this reason, when a rear collision occurs in the hybrid vehicle, the battery 26 is displaced together with (in conjunction with) the center cross member 16 and the rear cross member 18 to the front of the vehicle.

  To supplement this point, when a forward load is input to the rear end of the rear side member 12 (rear portion 12R) due to a rear collision, the vehicle body constituting the vehicle rear structure 10 bends to the front end portion of the rear side member 12. Occurs. As a result, the vehicle body is displaced from the posture before the rear collision shown in FIG. 6A so that the rear cross member 18 is lifted in the direction of arrow A as shown in FIG. 6B. At this time, in the vehicle rear structure 10, the battery 26 follows (interlocks) with the body deformation while maintaining the state surrounded by the rectangular frame RF and the seat frame 22, that is, the state where the battery housing space Rb is secured. Will be displaced. For this reason, it is prevented or effectively suppressed that the battery 26 itself is broken or the like due to the rear collision. That is, in the vehicle rear structure 10, the battery 26 is well protected against a rear collision of the applied hybrid vehicle.

  In the vehicle rear structure 10, the battery 26 is displaced forward in accordance with the body deformation at the time of a rear collision of the hybrid vehicle as described above. Therefore, for example, when the fuel tank 56 is displaced forward of the vehicle due to the forward displacement of the intermediate beam 55 due to a rear collision, the fuel tank 56 strongly interferes with the battery 26 as shown in FIG. Is prevented. As a result, the vehicle rear structure 10 is well protected against a rear collision of the hybrid vehicle applied to the fuel tank 56. Note that the battery 26 indicated by an imaginary line in FIG. 6B is the battery 26 before being displaced forward by a rear collision.

  In the embodiment described above, the seat frame 22 is fixed to the vehicle body via the left front bracket 30 and the rear bracket 34 provided on the battery 26, but the present invention is not limited to this. The part fixed to the vehicle body via the battery 26 in the seat frame 22 can be set as appropriate. Therefore, for example, the leg fixing portion 30B and the front cross fixing portion 30A may be provided in separate brackets, and the center bracket 34B and the L-shaped bracket 34A may be provided in separate brackets.

  In the above-described embodiment, the left front bracket 30 and the rear bracket 34 are regarded as members on the battery 26 side, but part or all of the left front bracket 30 and the rear bracket 34 are seat frame 22. You may think that it is a member of the side.

  Further, in the above-described embodiment, an example in which the fuel tanks 56 having different shapes are provided below and behind the battery 26 is shown. However, the present invention is not limited to this, and for example, a fuel having a general shape You may apply the mounting structure to the vehicle body of the seat frame 22 and the battery 26 to the motor vehicle provided with the tank.

10 Vehicle rear structure 12 Rear side member (side member)
14 Floor panel (vehicle floor)
16 Center cross member (first cross member)
18 Rear cross member (second cross member)
20A Seat cushion 22 Seat frame 24 Seat plate (panel member)
26 Battery 30 Front left bracket (front bracket)
30A front cross fixing part (first fixing part, first cross fixing part)
30B Leg fixing part (second fixing part)
34 Rear bracket 34A L-shaped bracket (first fixing part, second cross fixing part)
34B Center bracket (second fixed part)
38 Leg 46 Clip (Locking member)
56 Fuel tank 56A Body 56B Overhang

Claims (7)

A battery disposed on the vehicle floor and fixed to the vehicle body at the first fixing portion;
A seat frame that supports a seat cushion disposed on the upper side in the vehicle vertical direction with respect to the battery, wherein at least a part of the fixing portion with respect to the vehicle body is a second fixing portion fixed to the vehicle body via the battery;
The structure of a vehicle equipped with a battery. The seat frame has a plurality of legs that are spaced apart in the vehicle width direction on the front end side in the vehicle longitudinal direction,
The battery has a front bracket provided on the front end side in the vehicle longitudinal direction,
The said front bracket is provided with the leg fixing | fixed part to which the lower end part of the vehicle up-down direction in the at least 1 leg is fixed as said 2nd fixing | fixed part among the several leg parts. Structure of a battery-equipped vehicle. The seat frame has a rear frame extending in the vehicle width direction on the rear end side in the vehicle longitudinal direction,
The battery has a rear bracket provided on the rear end side in the vehicle longitudinal direction,
The structure of a battery-equipped vehicle according to claim 2, wherein the rear bracket is provided with a rear frame fixing portion to which the rear frame is fixed as the second fixing portion. A pair of left and right side members as a vehicle body skeleton extending in the vehicle longitudinal direction on both outer sides in the vehicle width direction with respect to the battery
A first cross member as a vehicle body skeleton provided on the vehicle floor and extending in the vehicle width direction to bridge the pair of cross members;
A second cross member as a vehicle body skeleton provided on the vehicle floor, extending in the vehicle width direction on the rear side in the vehicle front-rear direction with respect to the first cross member, and spanning the pair of cross members;
With
The front bracket is provided with a first cross fixing portion fixed to the first cross member as the first fixing portion,
The battery-equipped vehicle structure according to claim 3, wherein the rear bracket is provided with a second cross fixing portion fixed to the second cross member as the first fixing portion. A fuel tank is disposed below the vehicle floor in the vehicle vertical direction,
The fuel tank includes a main body disposed on the rear side in the vehicle front-rear direction with respect to the second cross member so that at least a part thereof overlaps the battery in a front view, and at least a part of the battery in a plan view. 5. A structure of a battery-equipped vehicle according to claim 4, further comprising: a projecting portion projecting from a lower end portion in the vehicle vertical direction of the main body portion to a front side in the vehicle front-rear direction so as to overlap .   The battery-equipped vehicle structure according to any one of claims 1 to 5, wherein a panel member that covers the battery from an upper side in a vehicle vertical direction is fixed to the seat frame.   The structure of the battery-equipped vehicle according to claim 6, wherein the seat cushion is locked to a locking member provided on the panel member.

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