JP2007083754A - Rear bodywork of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide rear bodywork of a vehicle capable of ensuring rigidity of a vehicle body with cross members extending in a vehicle width direction while increasing the degree of freedom in layout of space inside and outside a cabin with kick-up parts having different heights, and ensuring the space of the cabin while ensuring sufficient rigidity on either side of the cabin by longitudinally offsetting the cross members. <P>SOLUTION: In the vehicle with a bottom surface of the cabin formed by a floor panel 2, the floor panel 2 is provided with the kick-up parts 3 stepped upward. The kick-up parts 3 are composed of a first kick-up part 4, and a second kick-up part 5 provided side-by-side with the first kick-up part 4 in the vehicle width direction, higher in a height direction than the first kick-up part 4. The cross members 16 and 18 extending in the vehicle width direction over the first kick-up part 4 and the second kick-up part 5 are provided in the rear of the kick-up parts 3, and are longitudinally offset. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rear body structure of a vehicle in which a floor panel forming a lower surface (floor surface) of a passenger compartment is provided with a kick-up portion that is stepped upward.

Conventionally, as the rear body structure of the vehicle in the above-described example, there are structures shown in FIGS.
That is, a floor panel 100 that forms the lower surface of the passenger compartment is provided, and a driver's seat 101 and a passenger seat 102 are juxtaposed side by side on the front of the floor panel 100, while the rear side of the floor panel 100 is upward. A raised kick-up portion 103 having the same height on the left and right sides is provided, and rear seats 104 and 105 as left and right occupant seats are juxtaposed on the kick-up portion 103. In the intermediate portion in the width direction, a fuel tank 106 as a vehicle auxiliary machine is disposed below the outside of the vehicle.

  On the other hand, in Patent Document 1, a kick-up portion having the same height on the left and right is formed stepwise with respect to the floor panel, which includes a curved portion and an extended portion obtained by extending the curved portion as it is. Cross members extending in the vehicle width direction are provided on the vehicle outer front portion and the vehicle rear rear portion of the kick-up portion, respectively, and a rear seat is disposed on the kick-up portion, and the front and rear portions are disposed below the kick-up portion on the vehicle outer side. A fuel tank (vehicle auxiliary machine) is disclosed in which the upper surface of each cross member has a shape along the curved portion and the extension portion described above.

  In Patent Document 2, a kick-up floor portion is connected to a rear portion of a floor panel that forms a lower surface of a passenger compartment via a step portion, and a rear floor is connected to the kick-up floor portion via a rear kick-up portion. These steps, kick-up floor, rear kick-up, and rear floor are set to the same height on the left and right, and a rear seat is installed on the kick-up floor and rear kick-up as described above. On the other hand, there is disclosed a fuel tank (vehicle auxiliary machine) having a structure along the continuous shape of each of the above-described steps, kick-up floor, rear kick-up, and rear floor. Has been.

However, the conventional structure shown in FIGS. 21 to 23 and the above-described Patent Documents 1 and 2 include a technical idea that the size (height) of the kick-up portion is different in the vehicle width direction, and an offset. There is no technical idea of providing a rear cross member having a structure.
By the way, there is a request to configure a compact vehicle with a low overall height.In this case, in addition to ensuring the occupant's comfortability, considering the strength against side collision, the performance during traveling, the vehicle body rigidity following the movement of the vehicle, It is necessary to improve the vehicle body rigidity sufficiently.
Japanese Patent Laid-Open No. 6-211169 JP-A-5-627

  Accordingly, the present invention provides a first kick-up portion and a second kick-up portion that is juxtaposed in the vehicle width direction with respect to the first kick-up portion and that is higher in the height direction than the first kick-up portion. A cross member extending in the vehicle width direction over the rear of each kick-up portion, a portion disposed behind the first kick-up portion of the cross member, and a rear of the second kick-up By offsetting the installed part in the front-rear direction, the kick-up part with different heights expands the degree of freedom in the layout of the vehicle interior space and the vehicle exterior space, and the vehicle body rigidity is achieved by the cross member extending in the vehicle width direction. In addition, by offsetting the cross member back and forth, it is possible to secure sufficient rigidity on the left and right sides of the passenger compartment, as well as to secure the size of the passenger compartment. In I, and an object thereof is to provide a rear vehicle body structure of a vehicle that can achieve both securing freedom and rear body rigidity layout.

  In the vehicle body structure according to the present invention, in a vehicle in which a lower surface of a passenger compartment is formed by a floor panel, the floor panel is provided with a kick-up portion raised upward, and the kick-up portion is a first kick-up portion. An up part, and a second kick up part that is juxtaposed in the vehicle width direction with the first kick up part and that is higher in the height direction than the first kick up part. A cross member extending in the vehicle width direction is disposed across the 1 kick-up portion and the second kick-up portion, and the cross member includes a portion disposed behind the first kick-up portion, The portion disposed behind the kick-up portion is disposed offset in the front-rear direction.

According to the above configuration, the above-described kick-up portion includes the first kick-up portion and the second kick-up portion having different heights. Therefore, seats and supplements to the vehicle interior space and the vehicle exterior space above and below the kick-up portion. It is possible to increase the degree of layout freedom of the machine.
In addition, since the cross member (No. 4 cross member) extending in the vehicle width direction is provided behind the kick-up portion, the rear vehicle body rigidity can be ensured.

Further, since the above-mentioned cross member is offset in the front-rear direction, sufficient rigidity is secured on the left and right sides of the vehicle compartment, and the width of the vehicle compartment (particularly, the front-rear space between the kick-up portion and the cross member) is increased. Can be secured.
In short, in a compact body having a low overall height, it is possible to achieve both a degree of freedom in layout and securing of rear body rigidity.

In one embodiment of the present invention, a portion disposed behind the first kick-up portion of the cross member and a portion disposed behind the second kick-up portion are divided and formed. Both are connected by a connect member.
According to the above configuration, since the divided cross members are connected by the connect members, the rigidity can be improved.

In one embodiment of the present invention, a portion disposed behind the first kick-up portion of the cross member, a portion disposed behind the second kick-up portion, and a connect member that connects both of them. Are each formed in a closed cross-sectional structure.
According to the above configuration, each part of the cross member and the connect member have closed cross-sectional structures, so that the rigidity can be further improved.

In one embodiment of the present invention, the first vehicle auxiliary machine is disposed below the first kick-up part, and the second kick-up part is larger in the height direction than the first vehicle auxiliary machine. The second vehicle auxiliary machine is provided.
According to the above configuration, while ensuring the rear vehicle body rigidity by the cross member, it is efficient to classify the vehicle auxiliary machines having different sizes below the first kick-up portion and the second kick-up portion having different heights. As a result, the vehicle body rigidity can be secured and the layout of a plurality of vehicle auxiliary machines can be achieved in a compact body with a low overall height.

In one embodiment of the present invention, the first vehicle accessory is set as a first fuel tank, and the second vehicle accessory is set as a second fuel tank communicated with the first fuel tank.
According to the above configuration, the first fuel tank is disposed below the first kick-up portion that is low in the height direction while ensuring the rear vehicle body rigidity by the cross member, and the second kick-up portion that is high in the height direction. Since a large second fuel tank is arranged in the height direction in communication with the first fuel tank below, it is possible to ensure the tank capacity by using the lower part of both kick-up portions effectively. it can.

In one embodiment of the present invention, the first seat is disposed on the first kick-up portion, and the second seat for the passenger smaller than the size of the passenger seated on the first seat is disposed on the second kick-up portion. Two sheets are arranged.
According to the above configuration, the second seat for the occupant having a small physique is disposed on the upper portion of the second kick-up portion that is high in the height direction while ensuring the rigidity of the rear vehicle body by the cross member. In addition, since the first seat is disposed on the upper portion of the first kick-up portion corresponding to the upper space, the space in the vehicle interior can be used appropriately and used in a compact vehicle with a low overall height. However, it is possible to share the use of the occupant's physique, and a large number of people can be boarded. For example, three adults and a woman (or a child) can be boarded.

In one embodiment of the present invention, a passenger seat is disposed in front of the first seat, a driver seat is disposed in front of the second seat, and the passenger seat is in front of the driver seat. It is arranged with an offset.
According to the above configuration, it is possible to achieve particularly improved safety, usability, and comfort for the occupant of the first seat while securing the rear vehicle body rigidity by the cross member.

  That is, the space of the front row seat composed of the driver seat and the passenger seat can be ensured in a well-balanced manner, and in particular, both safety and usability of the first seat occupant can be achieved. In short, an occupant with a large physique can be seated on a first seat as a rear row seat on the passenger seat side. Generally, the rear row seat (first seat) on the passenger seat side is frequently used, and this first seat is used on the sidewalk side ( Since it corresponds to a so-called road shoulder), it is possible to achieve both safety and usability of the first seat occupant.

  In addition, the front passenger seat has an offset structure that allows the passenger seat space to be secured and the rear row seat (first seat) on the passenger seat side to be expanded, so that the passenger seated in the first seat is comfortable. It is possible to improve the performance. In other words, since the steering wheel is present on the driver's seat side, the driver's seat cannot be arranged in front of the driver's seat, but there is no steering wheel on the passenger's seat side. The seat can be disposed with an offset to the front, thereby increasing the space of the rear row seat on the passenger seat side, and improving the comfort of the passenger of the first seat as the rear row seat it can.

In one embodiment of the present invention, the seat back of the first seat includes a rear reclining mechanism and is configured to be reclining.
According to the above configuration, the comfort of the occupant of the first seat can be improved while ensuring the rear vehicle body rigidity by the cross member.

  In other words, the first seat as the rear seat on the passenger seat side is provided with a mechanism for reclining the seat back of the first seat because an occupant having a physique larger than the physique of the occupant seated on the second seat is seated. As a result, the comfort can be improved, and the rear body rigidity can be improved and the seat back can be reclined.

In one embodiment of the present invention, the rear portion of the first fuel tank is extended to the rear of the reclining mechanism.
According to the above configuration, since the rear portion of the first fuel tank is extended to the rear of the reclining mechanism while ensuring the rear vehicle body rigidity by the cross member, the capacity of the fuel tank can be increased.

  According to this invention, the first kick-up portion and the second kick-up portion that are juxtaposed in the vehicle width direction with respect to the first kick-up portion and that are higher in the height direction than the first kick-up portion. A cross member extending in the vehicle width direction over the rear of each kick-up portion, a portion disposed behind the first kick-up portion of the cross member, and a rear of the second kick-up Since the parts to be installed are offset in the front-rear direction, the cross-member that extends in the vehicle width direction increases the rigidity of the vehicle body while increasing the layout flexibility of the vehicle interior space and the vehicle exterior space by the kick-up parts with different heights. In addition, the cross member's front / rear offset structure ensures sufficient rigidity on the left and right sides of the passenger compartment, as well as the spaciousness of the passenger compartment. There is an effect that it is possible to achieve both the ensuring of freedom and the rear vehicle body rigidity layout.

  In a compact body with a low overall height, the floor panel is raised upward in a vehicle in which the lower surface of the passenger compartment is formed by the floor panel, with the aim of achieving both freedom of layout and ensuring rear body rigidity. The kick-up section is provided, and the kick-up section is arranged in parallel with the first kick-up section and the first kick-up section in the vehicle width direction, and is higher in the height direction than the first kick-up section. And a cross member extending in the vehicle width direction across the first kick-up portion and the second kick-up portion is disposed behind the kick-up portion. This is realized by a configuration in which the portion disposed behind the portion and the portion disposed behind the second kick-up portion are disposed offset in the front-rear direction.

An embodiment of the present invention will be described in detail with reference to the drawings.
The drawings show the rear vehicle body structure of the vehicle. First, the overall structure of the vehicle body structure will be described with reference to FIGS. 1 to 6. A dash lower panel (dash panel) that partitions the engine room E and the vehicle compartment R in the front-rear direction. 1 and a floor panel 2 extending substantially horizontally toward the rear is integrally or integrally connected to the rear end of the lower end of the dash lower panel 1, and the floor panel 2 forms a lower surface (bottom surface) of the passenger compartment R. ing.

A kick-up part 3 (see FIG. 2) raised upward is provided at the rear part of the floor panel 2 described above. This kick-up part 3 is the first kick-up on the passenger side Pa (see the right side of the vehicle). And a second kick-up portion 5 on the driver's seat side Dr (see the left side of the vehicle) arranged in parallel with the first kick-up portion 4 in the vehicle width direction.
Moreover, as shown in a perspective view in FIG. 2, the second kick-up portion 5 is formed to be higher in the height direction than the first kick-up portion 4.

  Here, the first kick-up portion 4 described above includes a front wall portion 4a that rises from the floor panel 2, and a kick-up floor portion 4b that extends substantially horizontally from the front wall portion 4a toward the rear.

  The second kick-up portion 5 includes a front wall portion 5a that rises from the floor panel 2, and a kick-up floor portion 5b that extends substantially horizontally from the front wall portion 5a toward the rear. The rising amount of the front wall portion 5a of the kick-up portion 5 is set larger than the rising amount of the front wall portion 4a of the first kick-up portion 4, and the height of the kick-up floor portion 5b of the second kick-up portion 5 is set. However, it is comprised so that it may become higher than the height of the kick-up floor part 4b of the 1st kick-up part 4. FIG.

Moreover, as shown in FIGS. 2 and 3, the first kick-up portion 4 is formed to be offset from the second kick-up portion 5 by a predetermined distance L1 in front of the vehicle.
A rear floor 7 is connected via a rear kick-up portion 6 further behind the kick-up floor portions 4b and 5b in the kick-up portion 3 described above.
As shown in FIG. 3, the rear kick-up portion 6 on the driver's seat side Dr is offset backward with respect to the rear kick-up portion 6 on the passenger seat side Pa. In other words, corresponding to the offset structure of the first and second kick-up portions 4, 5, the rear kick-up portion 6 on the passenger seat side Pa is offset more forward than the rear kick-up portion 6 on the driver seat side Dr. It is formed.

  On the other hand, a tunnel portion 8 is formed at the center of the floor panel 2 in the vehicle width direction so as to protrude inward of the passenger compartment R and extend in the vehicle front-rear direction. The tunnel portion 8 is formed between the dash lower panel 1 and the rear kick-up portion 6 so as to extend in the front-rear direction of the vehicle, and a closed cross section is formed between the tunnel portion 8 and the tunnel portion 8. 9 are joined to each other (a so-called high-mount backbone frame).

The tunnel member 10 described above is a vehicle body rigid member (strength member) that extends in the front-rear direction of the vehicle between the dash lower panel 1 and the rear kick-up portion 6 along the upper portion of the tunnel portion 8. The rigidity and vehicle body rigidity are improved.
As shown in FIGS. 3 and 4, side sills 11, 11 extending in the vehicle front-rear direction are joined to both ends of the floor panel 2 in the vehicle width direction.

  The side sill 11 is a vehicle body rigid member having a side sill closed cross section that extends in the vehicle front-rear direction by joining a side sill outer, a side sill inner, and a side sill reinforcement. However, the side sill inner is shown in the drawings.

  As shown in FIGS. 2, 3, 5, and 6, a tunnel portion 8 and a side sill 11 (specifically, a side sill inner) are connected to the intermediate portion in the front-rear direction of the floor panel 2 in the vehicle width direction. An extending cross member 12 (No. 2 cross member) is provided, and a closed cross section 13 extending in the vehicle width direction is formed between the cross member 12 (vehicle body rigid member) and the upper surface of the floor panel 2.

  As shown in FIGS. 2, 3, and 5, a cross member 14 (No. 3 cross member) extending in the vehicle width direction is provided at the front portion of the first kick-up portion 4 on the passenger seat side Pa to provide the first kick A closed cross section 14 a extending in the vehicle width direction is formed between the upper surface of the up portion 4 and the cross member 14.

  As shown in FIGS. 2, 3, and 6, a cross member 15 (No. 3 cross member) extending in the vehicle width direction is provided at the front portion of the second kick-up portion 5 on the driver's seat side Dr. A closed cross-section 15a extending in the vehicle width direction is formed between the upper surface of the two kick-up portion 5 and the cross member 15.

As shown in FIGS. 2 and 3, the above-described cross members 14, 15 (vehicle body rigid members) are more than the first kick-up portion 4 than the cross-member 15 disposed at the front portion of the second kick-up portion 5. A cross member 14 disposed at the front is offset from the front of the vehicle.
Each of these cross members 14 and 15 is located inside the vehicle interior R, and the vehicle interior side end (inner end in the vehicle width direction) is connected and fixed to the tunnel portion 8 described above. The connection structure is configured to ensure the vehicle body rigidity.

  As shown in FIGS. 2, 3, and 5, a rear cross member 16 that extends in the vehicle width direction on the outer side of the rear kick-up portion 6 and the rear floor 7 is behind the first kick-up portion 4 on the passenger seat side Pa. (No. 4 cross member) is provided, and a closed cross section 16a extending in the same direction is formed between the elements 6, 7, 16 and the rear floor 7 and the rear cross member 16 are vertically moved in the closed cross section 16a. A substantially Z-shaped knot member 17 connected to is provided to improve rigidity.

  As shown in FIGS. 2, 3, and 6, a rear cross member 18 extending in the vehicle width direction on the outer side of the rear kick-up portion 6 and the rear floor 7 is behind the second kick-up portion 5 on the driver's seat side Dr. (No. 4 cross member) is provided, and a closed cross-section 18a extending in the same direction is formed between the elements 6, 7, and 18.

  These rear cross members 16 and 18 (vehicle body rigid members) are vehicle body rigid members that extend in the vehicle width direction across the first kick-up portion 4 and the second kick-up portion 5 behind the kick-up portion 3. 2, these rear cross members 16 and 18 are disposed behind the first kick-up portion 4 and the rear cross member 16 and the second kick-up portion 5 as shown in FIG. The rear cross member 18 is offset in the front-rear direction of the vehicle, and each of the rear cross members 16 and 18 is formed as a left and right non-object.

  In this embodiment, as shown in FIGS. 2 and 3, the front portion of the rear cross member 16 on the passenger side Pa disposed behind the first kick-up portion 4 is located behind the second kick-up portion 5. The vehicle is offset from the front of the rear cross member 18 on the driver's seat side Dr.

  A cross member 19 (No. 5 cross member) that extends in the vehicle width direction and connects between a pair of left and right rear side frames 43 and 43, which will be described later, is provided further rearward of each of the rear cross members 16 and 18. A closed cross section 19a extending in the vehicle width direction is formed between 19 (the vehicle body rigid member) and the rear floor 7.

On the other hand, as shown in FIGS. 2 and 4, on the lower surface of the floor panel 2, a pair of left and right floor frames 20 extending in the vehicle longitudinal direction between the side sill 11 and the tunnel portion 8 in the vehicle width direction, 20, closed cross sections 20a and 20a extending in the same direction are formed between the floor frames 20 and 20 and the lower surface of the floor panel 2, respectively.
Each of the floor frames 20, 20 described above is a vehicle body rigid member joined to the floor panel 2.

  By the way, as shown in a bottom view in FIG. 4, a transmission 21 as an irregular means is disposed in a lower space outside the vehicle of the tunnel portion 8, and the output of the transmission 21 is transmitted to a propeller shaft 22 (propulsion shaft). The differential output of the rear differential device 23 is transmitted to the left and right rear wheels 25, 25 via the left and right rear wheel drive shafts 24, 24. The left and right rear wheels 25, 25 are suspended independently by left and right rear suspension devices 26, 26 (for example, double wishbone type suspension devices).

  A power plant frame 27 having a substantially Z-shaped cross section and extending in the front-rear direction of the vehicle is provided between the transmission case of the transmission 21 and the differential case of the rear differential device 23.

  This power plant frame 27 (so-called PPF) is a frame that connects the transmission 21 and the rear differential device 23 to a rigid, and this power plant frame 27 allows movement in the roll direction from the engine drive system, This is to suppress the wind-up vibration of the rear differential device 23.

  Further, as shown in FIG. 4, the engine exhaust system includes a front exhaust pipe 28, a catalyst 29, a middle exhaust pipe 30, a pre-silencer 31, a rear exhaust pipe 32, a main silencer 33, and tail pipes 34, 34. An exhaust passage 35 is connected, and the exhaust passage 35 is supported on the body side via a bracket (not shown). The front exhaust pipe 28, the catalyst 29, and the middle exhaust pipe 30 are provided in a lower space outside the tunnel portion 8 on the vehicle exterior. Is located.

By the way, as shown in FIGS. 3 to 6, a sub tank 36 (first fuel tank) as a first vehicle auxiliary machine is disposed below the first kick up portion 4, and the second kick up portion 5 A main tank 37 (second fuel tank) as a large second vehicle auxiliary machine is disposed below the sub tank 36 in the height direction. As shown in a perspective view of FIG. The tank 37 communicates in the vehicle width direction with a substantially gate-shaped tunnel tank portion 38 that rises upward and extends in the vehicle width direction, and is integrated as a single fuel tank 39 of asymmetrical saddle type.
Here, a raised portion 36a that rises along the rear surface of the rear kick-up portion 6 is formed integrally with the rear portion of the sub-tank 36, and the raised portion 36a is also configured to increase the tank capacity. is doing.

  A fuel pump 40 is attached to the upper part of the main tank 37. On the other hand, a fuel tank 39 in which the above-described sub tank 36 and main tank 37 are integrated via a tunnel tank portion 38 has a body side via tank bands 41 and 42 as shown in FIGS. It is supported by. Here, since the sub-tank 36 and the main tank 37 are unitized as a single fuel tank 39 by the tunnel tank portion 38, the structure for supporting and attaching to the body is simplified by the tank bands 41 and 42. Can do.

8 is a cross-sectional view taken along line AA in FIG. 3, FIG. 9 is a cross-sectional view taken along line BB in FIG. 3, FIG. 10 is a cross-sectional view corresponding to the tunnel tank portion 38, and FIG. FIG. 12 is a cross-sectional view taken along the line D-D of FIG. 3, and as shown in FIGS. 3 and 8 to 12, the vehicle body is disposed on both sides of the lower surface of the rear floor 7. Rear side frames 43 and 43 (rear frames) as rigid members are joined, and the pair of left and right rear side frames 43 and 43 are extended toward the front end of the vehicle up to the rear end of the side sill 11.
Further, as shown in FIGS. 8, 9, and 10, rear side inner panels 44, 44 are bonded and fixed to the outer sides in the vehicle width direction of the first and second kick-up portions 4, 5, respectively.

As shown in FIG. Each of the cross members 14 and 15 as the three cross members has a front portion of the first kick-up portion 4 because the cross member 14 on the passenger side Pa is offset from the cross member 15 on the driver side Dr. The vehicle interior side end (in the vehicle width direction inner end) of the cross member 14 disposed in the vehicle interior and the vehicle interior side end (in the vehicle width direction inside) of the cross member 15 disposed in the front of the second kick-up portion 5. Are connected by connecting members 45 and 46 as reinforcing members shown in FIGS.
These connecting members 45 and 46 are located in the tunnel portion 8, that is, outside the tunnel portion 8, as shown in cross-sectional views in FIGS. 8 and 9.

  Further, as shown in a plan view in FIG. 3, both the connect members 45 and 46 have a front-rear width in which the connect members 45 and 46 overlap each other, and one connect member 45 overlaps both the cross members 14 and 15. The other connecting member 46 has a front-rear width that overlaps the cross members 14, 15.

  One connect member 45 is joined to the intermediate lower surface of the top deck portion of the tunnel portion 8 and the lower end vehicle exterior of the tunnel portion 8, and a closed cross-section 45 a is formed between the tunnel portion 8.

  The other connect member 46 is joined to the vehicle outer side of the intermediate portion of the vertical wall portion of the tunnel portion 8 and the vehicle outer surface of the one connect member 45, and a closed cross-section 46 a is formed between the tunnel portion 8. .

  As shown in FIG. 13 in an exploded perspective view of both the connect members 45 and 46, one connect member 45 includes an upper joining piece 45b, an intermediate joining piece 45c in the vertical direction, and a lower joining piece 45d. These are reinforcing members which have connecting pieces 45e and 45f connecting the connecting pieces, that is, connecting pieces 45b and 45c, and connecting pieces 45c and 45d, and these pieces 45b to 45f are integrally formed of a metal member.

  The other connecting member 46 has an upper joining piece 46b, a lower joining piece 46c, and a curved joining piece 46d that joins both joining pieces 46b and 46c in the vertical direction. This is a reinforcing member in which pieces 46b to 46d are integrally formed of a metal member.

  Here, in addition to the structure shown in FIG. 13, as shown in FIG. 14, beads 45 g, 46 e (for example, cross-shaped beads) extending at least in the vehicle width direction are closed on each of the above-mentioned connect members 45, 46. It may be integrally formed toward the 46a side, and the bead 45g, 46e may further improve the rigidity of the vehicle body and the side impact resistance.

  As shown in a sectional view of a portion corresponding to the tunnel tank portion 38 of the fuel tank 39 in FIG. 10, the tunnel tank portion 38 that communicates the sub tank 36 and the main tank 37 in the vehicle width direction outside the tunnel portion 8. Below, a middle exhaust pipe 30 (exhaust pipe), a propeller shaft 22 and a power plant frame 27 as third vehicle auxiliary machines are arranged.

  As shown in FIG. Each of the rear cross members 16 and 18 as the four cross members is disposed such that the front portion of the rear cross member 16 on the passenger seat side Pa is offset from the front portion of the rear cross member 18 on the driver seat side Dr in front of the vehicle. Since these rear cross members 16 and 18 are divided and formed in the vehicle width direction, these rear cross members 16 and 18 are connected in the vehicle width direction by a connect member 47 as shown in FIGS. is doing.

  The above-mentioned connect member 47 is a member having a concave cross section. The connect member 47 is connected to the lower surface of the rear floor 7, and a closed cross section 47 a is formed between the two members 47. Further, as shown in FIGS. 11 and 12, one rear cross member 16 is connected between the rear side frame 43 having a closed section 43a structure and one side of the connect member 47, and the other rear cross member 18 is also shown in FIG. As shown, it is connected between the rear side frame 43 having a closed section 43a structure and the other side of the connect member 47.

  The above-mentioned connect member 47 is No. Of the rear cross members 16 and 18 as the four cross members, the rear cross members 16 and 18 have substantially the same front and rear width as the rear cross member 16 having the wider front and rear width, and the divided rear cross members 16 and 18 are arranged in the vehicle width direction. A connection member to be connected.

  As shown in the perspective view of FIG. 15, the connect member 47 has upper joining pieces 47b and 47c, left and right vertical wall pieces 47d and 47e, and a bottom piece 47f. The connecting members 47b to 47f are integrally formed of metal members, and the connecting piece 47c and the vertical wall piece 47e on the driver's seat side Dr are configured to correspond to the shapes of the rear floor 7 and the rear kick-up portion 6. .

  Here, in addition to the structure shown in FIG. 15, as shown in FIG. 16, a reinforcing piece 47 g having a gate shape in section is provided to connect between the left and right vertical wall pieces 47 d and 47 e in the vehicle width direction. A closed cross section extending in the vehicle width direction may be formed between the bottom piece 47f and the rigidity of the connect member 47 itself, the rear vehicle body rigidity, and the side impact resistance may be improved.

  FIG. 17 is a plan view showing a state in which the rear row seat and the front row seat are attached to the vehicle body shown in FIG. 3, and a first rear seat 51 is disposed on the first kick-up portion 4 described above, A second rear seat 52 for an occupant Y (see FIG. 6) whose physique is smaller than the physique of an occupant X (see FIG. 5) seated on the first rear seat 51 is disposed on the second kick-up portion 5. .

Each of the first and second rear seats 51 and 52 is configured as a left and right separate seat (bucket seat) having seat cushions 51C and 52C and seat backs 51B and 52B, respectively. As shown in FIG. 5, the seat back 51B of the first rear seat 51 includes a reclining mechanism 55 including a reclining hinge pin 53 and a reclining hinge bracket 54. The imaginary line in FIG. Thus, it is comprised so that reclining is possible back.
As shown in FIG. 5, a protruding portion 36 a of the sub tank 36 serving as the first fuel tank is extended to the rear of the reclining mechanism 55.

  Further, front row seats 56 and 57 are disposed in front of the first rear seat 51 and the second rear seat 52, and the front row seats 56 and 57 are arranged in parallel with a driver's seat 57 and a passenger arranged in the vehicle width direction. A passenger seat 56 is disposed in front of the first rear seat 51, and a driver seat 57 is disposed in front of the second rear seat 52. In other words, the second rear seat 52 is disposed behind the driver's seat 57, and the occupant Y having a small physique is seated on the second rear seat 52. Can be set widely.

  As shown in FIGS. 5, 6, and 17, the passenger's seat 56 and the driver's seat 57 have left and right separate seats (buckets) having seat cushions 56C and 57C, seat backs 56B and 57B, and headrests 56H and 57H, respectively.・ Sheet).

  As shown in FIG. 17, the passengers seat 56 is disposed so as to be offset from the front of the vehicle relative to the driver's seat 57, while the first rear seat 51 is located more than the second rear seat 52 on the rear row seat side. It is arranged so as to be offset forward.

As shown in FIGS. 5 and 6, the passenger seat 56 and the driver's seat 57 can be seated by front seat passengers Z1 and Z2, which are larger in size than the passenger Y, and the rear seat of the passenger seat side Pa, that is, The first rear seat 51 can seat a rear seat occupant X substantially the same as the size of the front seat occupants Z1, Z2, so that the passengers seat 56 and In order to optimize the space before and after the first rear seat 51, the rear seat 51 (see FIG. 18) larger than the rear seat 51 shown in FIG. 17 can be arranged as the first rear seat 51 in particular. Yes.
In the figure, 58 is a steering wheel, 59 is an instrument panel, 60 is a roof portion, and 61 is a front wheel. An arrow F indicates the front of the vehicle.

  As described above, the rear body structure of the vehicle of the embodiment shown in FIGS. 1 to 18 is raised upward on the floor panel 2 in the vehicle in which the lower surface of the passenger compartment R is formed by the floor panel 2. A kick-up unit 3 is provided. The kick-up unit 3 is arranged in parallel with the first kick-up unit 4 and the first kick-up unit 4 in the vehicle width direction, and in the height direction from the first kick-up unit 4. Rear cross members 16 and 18 (in the rear side of the kick-up portion 3 and extending in the vehicle width direction across the first kick-up portion 4 and the second kick-up portion 5) No. 4 cross member) is disposed, and the rear cross members 16 and 18 are disposed at the rear portion of the first kick-up portion 4 and the rear portion of the second kick-up portion 5. The portion 18 is the front-back direction In which is disposed to be offset.

According to this configuration, the above-described kick-up unit 3 includes the first kick-up unit 4 and the second kick-up unit 5 having different heights. It is possible to increase the degree of freedom of layout of the seats and auxiliary machines for the outdoor space.
In addition, since the rear cross members 16 and 18 extending in the vehicle width direction are provided behind the kick-up portion 3, the rear vehicle body rigidity can be ensured.

Further, since the above-described rear cross members 16 and 18 are offset in the front-rear direction, sufficient rigidity is secured on the left and right sides of the passenger compartment R, and the space in the passenger compartment R (in particular, the kick-up portion 3 and the rear cross) is secured. This is the front and rear space between the members 16 and 18, and the right and left dimensions (refer to the front and rear dimensions necessary for the rear seat passengers X and Y to be seated) can be appropriately secured.
In short, in a compact body having a low overall height, it is possible to achieve both a degree of freedom in layout and securing of rear body rigidity.

Further, a portion (refer to the rear cross member 16) disposed behind the first kick-up portion 4 of the rear cross members 16 and 18 and a portion disposed behind the second kick-up portion 5 (rear cross). The members 18 and 18 are divided and formed, and both the members 16 and 18 are connected by a connect member 47.
According to this configuration, since the divided rear cross members 16 and 18 are connected by the connect member 47, the rigidity can be improved.

  Further, a portion of the rear cross members 16, 18 disposed behind the first kick-up portion 4 (see the rear cross member 16) and a portion disposed behind the second kick-up portion 5 (rear cross) The member 18) and the connecting member 47 that connects these members 16 and 18 are each formed in a closed cross-sectional structure.

  According to this configuration, the rear cross member portions 16 and 18 and the connect member 47 have the closed cross-sections 16a, 18a, and 47a, respectively, so that the rigidity can be further improved.

  In addition, a first vehicle auxiliary device (see sub tank 36) is disposed below the first kick up portion 4, and a first vehicle auxiliary device (sub tank 36) is disposed below the second kick up portion 5. A large second vehicle auxiliary machine (see main tank 37) is disposed in the height direction.

  According to this configuration, the rear cross members 16 and 18 ensure the rear vehicle body rigidity, and the first and second kick-up portions 4 and 5 having different heights have different vehicle sizes. Machine (sub-tank 36, main tank 37) can be sorted and efficiently packaged. As a result, the vehicle body rigidity is ensured in a compact body with a low overall height, and a layout of a plurality of vehicle auxiliary machines (see fuel tanks) is obtained. Can be achieved.

The first vehicle accessory is set to a first fuel tank (see sub tank 36), and the second vehicle accessory is a second fuel tank (see main tank 37) communicated with the first fuel tank (sub tank 36). Is set.
According to this configuration, the first fuel tank (sub-tank 36) is disposed below the first kick-up portion 4 that is low in the height direction while ensuring the rear vehicle body rigidity by the rear cross members 16 and 18. A large second fuel tank (main tank 37) is disposed below the second kick-up portion 5 which is high in the vertical direction and communicated with the first fuel tank (sub-tank 36). By effectively using the lower part of the parts 4 and 5, the tank capacity can be reliably ensured.

Further, a first rear seat 51 is disposed on the first kick-up portion 4 and an occupant smaller than the physique of the occupant X (see FIG. 5) seated on the first rear seat 51 on the second kick-up portion 5. A second rear seat 52 for Y (see FIG. 6) is disposed.
According to this configuration, the rear vehicle body rigidity by the rear cross members 16 and 18 is ensured, and the upper portion of the second kick-up portion 5 that is high in the height direction is provided for the passenger Y having a small physique corresponding to the upper space. Since the second rear seat 52 is disposed and the first rear seat 5 is disposed in the upper portion of the first kick-up portion 4 corresponding to the upper space thereof, the space in the passenger compartment R can be used appropriately. Even if it is a compact vehicle with a low overall height, it can be shared by the occupants X and Y, allowing for multiple passengers, for example, three adults and women (or children) Become.

In addition, a passenger's seat 56 is disposed in front of the first rear seat 51, a driver's seat 57 is disposed in front of the second rear seat 52, and the passenger's seat 56 is offset forward from the driver's seat 57. It is arranged.
According to this configuration, it is possible to achieve improvement in safety, usability, and comfort of the occupant of the first rear seat 51 while securing the rear vehicle body rigidity by the rear cross members 16 and 18.

  That is, the space of the front row seat composed of the driver's seat 57 and the passenger's seat 56 can be secured in a well-balanced manner, and in particular, both safety and usability of the passenger X of the first rear seat 51 can be achieved. In short, the occupant X having a large physique can be seated on the first rear seat 51 as the rear seat of the passenger seat side Pa. In general, the rear seat (first rear seat 51) of the passenger seat side Pa is frequently used. Since the rear seat 51 corresponds to the sidewalk side (so-called road shoulder), it is possible to achieve both the safety of the passenger of the first rear seat 51 and the usability.

  In addition, the passenger seat 56 has a front-offset structure, so that the passenger seat space can be secured and the rear seat (first rear seat 51) on the passenger seat side Pa can be expanded. It is possible to improve the comfort of the occupant X. That is, since the steering wheel 58 exists on the driver's seat side Dr, the driver's seat 57 cannot be disposed forward, but the passenger's seat side Pa has the passenger seat space because the steering wheel 58 does not exist. The passenger's seat can be offset and disposed forward, and thus the space of the rear row seat of the passenger seat Pa can be expanded, and the passenger X of the first rear seat 51 as the rear row seat can be expanded. Increased comfort can be achieved.

In addition, the seat back 51B of the first rear seat 51 includes a reclining mechanism 55 that is configured to be reclining.
According to this configuration, it is possible to improve the comfort of the occupant X of the first rear seat 51 while ensuring the rear vehicle body rigidity by the rear cross members 16 and 18.

  That is, since the occupant X whose physique is larger than the physique of the occupant Y seated on the second rear seat 52 is seated on the first rear seat 51 as the rear seat of the passenger seat Pa, the seat back 51B of the first rear seat 51 is seated. By providing the mechanism 55 for reclining the vehicle, it is possible to improve the comfort and achieve both the improvement of the rear vehicle body rigidity and the reclining of the seat back.

Further, the rear portion (see the raised portion 36a) of the first fuel tank (see the sub tank 36) extends to the rear of the reclining mechanism 55.
According to this configuration, since the rear portion of the first fuel tank (sub tank 36) extends to the rear of the reclining mechanism 55 while ensuring the rear vehicle body rigidity by the rear cross members 16 and 18, the capacity of the fuel tank 39 is increased. Can be achieved.

  Further, as disclosed in the embodiment, when the first rear seat 51 is disposed to be forwardly offset with respect to the second rear seat 52, the space in the vehicle interior R is divided into the front and rear directions to appropriately use the space. The front and rear spaces in the passenger compartment R can be used effectively. In particular, when the seat 51 (see FIG. 18) larger than the seat shown in FIG. The comfort of the seat occupant X can be further improved.

  In addition, the second rear seat 52 is offset backward with respect to the first rear seat 51, and the driver's seat 57 is disposed in front of the second rear seat 52, so that the driver's seat space can be expanded. Therefore, it is possible to improve the comfort and comfort of the driver Z2.

  Further, as disclosed in the embodiment, the first fuel tank (sub tank 36) and the second fuel tank (main tank 37) communicate with each other via the tunnel tank portion 38 that rises upward and extends in the vehicle width direction. When a third vehicle auxiliary machine (see propeller shaft 22 and middle exhaust pipe 30 as an exhaust pipe) is disposed below the tunnel tank portion 38, the tank capacity of the fuel tank is secured and the third vehicle auxiliary machine (propeller) Both the layout of the shaft 22 and the exhaust pipe 30) can be achieved. In particular, the first and second fuel tanks (the sub tank 36 and the main tank 37) can be connected and integrated in the tunnel tank portion 38 while ensuring the maximum tank capacity, so that the structure of the fuel tank 39 is simplified. In addition, it is possible to improve the assembly and reduce the number of mounting steps.

  FIGS. 19 and 20 show another embodiment. In the previous embodiment shown in FIGS. 1 to 18, the cross members 14 and 15 are disposed on the upper front side of the first and second kick-up portions 4 and 5, respectively. However, in this embodiment shown in FIGS. 19 and 20, the cross members 14 and 15 are disposed below the front portions of the first and second kick-up portions 4 and 5, respectively. A sub-tank 36 and a main tank 37 that do not interfere with 14 and 15 are disposed below the corresponding kick-up portions 4 and 5.

  Also in this embodiment shown in FIGS. 19 and 20, the other configurations, operations, and effects are almost the same as those in the previous embodiment. Therefore, in FIGS. 19 and 20, the same parts as those in FIGS. Are given the same reference numerals and their detailed description is omitted.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The cross member of the present invention corresponds to the rear cross members 16 and 18 (No. 4 cross member) of the embodiment,
Similarly,
The portion disposed behind the first kick-up portion in the cross member corresponds to the rear cross member 16,
The portion disposed behind the second kick-up portion in the cross member corresponds to the rear cross member 18,
The first vehicle auxiliary machine corresponds to the sub tank 36 (first fuel tank),
The second vehicle auxiliary machine corresponds to the main tank 37 (second fuel tank),
The first seat corresponds to the first rear seat 51,
The second seat corresponds to the second rear seat 52,
The passenger seat corresponds to the passenger seat 56,
The driver's seat corresponds to the driver's seat 57,
The present invention is not limited to the configuration of the above-described embodiment.
For example, in the above-described embodiment, the configuration applied to the left-hand drive vehicle is exemplified, but it is needless to say that the above-described structure may be applied to the right-hand drive vehicle.

Side view of vehicle with rear body structure of the present invention Perspective view showing the rear body structure of the vehicle Plan view of FIG. Bottom view of the main part of the vehicle Side view showing the rear body structure of the passenger side Side view showing the rear body structure of the driver's seat Perspective view of fuel tank 3 is a cross-sectional view taken along line AA in FIG. BB cross-sectional view of FIG. Sectional view of the part corresponding to the tunnel tank CC sectional view taken along the line CC in FIG. DD sectional view taken along line D-D in FIG. Disassembled perspective view of reinforcing member An exploded perspective view showing another embodiment of the reinforcing member Connected member perspective view The perspective view which shows the other Example of a connect member Plan view showing the seat Plan view supporting the first sheet in an enlarged state Side view showing another embodiment of the vehicle body structure on the passenger seat side Side view showing another embodiment of the vehicle body structure on the driver's seat side Plan view showing conventional auxiliary equipment arrangement structure FIG. 21 is a side view of the driver side. FIG. 21 is a side view of the passenger seat side.

Explanation of symbols

R ... Vehicle compartment 2 ... Floor panel 3 ... Kick-up part 4 ... First kick-up part 5 ... Second kick-up part 16, 18 ... Rear cross member (cross member)
16a, 18a ... closed section 36 ... sub tank (first vehicle auxiliary machine)
37 ... Main tank (second vehicle accessory)
47 ... Connect member 47a ... Closed section 51 ... First rear seat (first seat)
51B ... Seat back 52 ... Second rear seat (second seat)
55 ... Reclining mechanism 56 ... Passengers seat (passenger seat)
57 ... Driver's seat (driver's seat)

Claims (9)

In a vehicle in which the lower surface of the passenger compartment is formed by a floor panel,
The floor panel is provided with a kick-up portion raised upward,
The kick-up portion includes a first kick-up portion and a second kick-up portion that is juxtaposed in the vehicle width direction with the first kick-up portion and is higher in the height direction than the first kick-up portion,
A cross member extending in the vehicle width direction over the first kick-up portion and the second kick-up portion is disposed behind the kick-up portion,
The cross member has a rear vehicle body structure in which a portion disposed behind the first kick-up portion and a portion disposed behind the second kick-up portion are offset in the front-rear direction. . A portion of the cross member disposed behind the first kick-up portion and a portion disposed behind the second kick-up portion are formed separately, and both are connected by a connect member. Item 4. A rear body structure of a vehicle according to Item 1. A portion disposed behind the first kick-up portion of the cross member, a portion disposed behind the second kick-up portion, and a connect member connecting the two are formed in a closed cross-sectional structure. The rear body structure of the vehicle according to claim 2. A first vehicle accessory is disposed below the first kick-up portion, and a second large vehicle accessory is disposed below the second kick-up portion in the height direction from the first vehicle accessory. The vehicle rear body structure according to any one of claims 1 to 3. 5. The rear vehicle body structure according to claim 4, wherein the first vehicle accessory is set to a first fuel tank, and the second vehicle accessory is set to a second fuel tank communicated with the first fuel tank. While disposing a first sheet on the first kick-up portion,
The rear body structure of a vehicle according to any one of claims 1 to 5, wherein a second seat for an occupant smaller than the size of an occupant seated on the first seat is disposed on the second kick-up portion. A front passenger seat is disposed in front of the first seat, a driver seat is disposed in front of the second seat, and a front passenger seat is offset forward from the driver seat. 6. The rear body structure of the vehicle according to 6. The rear body structure of a vehicle according to claim 6 or 7, wherein the seat back of the first seat is provided with a reclining mechanism for rearward and configured to be reclining. The rear body structure of the vehicle according to claim 8, wherein a rear portion of the first fuel tank extends to the rear of the reclining mechanism.

Images