KR940010695B1 - Vehicle rear body structure - Google Patents

Abstract

No content.

Description

Car rear body structure

1 is a partial cross-sectional perspective view of a vehicle rear body structure of a first embodiment of the present invention;

2 is a plan view from which the rear bottom panel of the automobile rear body structure of the first embodiment of the present invention is removed.

3 is a side view of the vehicle rear body structure.

4 is a perspective view of the right rear of the vehicle rear body structure as viewed from the rear.

5 is a schematic cross-sectional view of the rear body structure of an automobile as viewed from behind.

6 is a perspective view of the right side frame as viewed from the front, forming a portion in which the rear frame assembly is used in the vehicle rear body structure;

7 is an enlarged perspective view of the side frame in FIG. 6 viewed from the rear;

8 is a cross-sectional view taken along line VII-VII of FIG.

9 is a cross-sectional view taken along line VII-VII of FIG.

10 is a cross-sectional view taken along line VII-VII of FIG.

11 is a schematic sectional view seen from the inside of the vehicle body structure, in which a method of representing the current maximum support bracket by the side frame is enlarged.

FIG. 12 is a view similar to that of FIG. 11 showing the support of the suspension support bracket by the side frame as seen from the outside of the body structure.

13 is an enlarged sectional view taken along line XIII-XII in FIG. 4;

FIG. 14 is a sectional view taken along the line XIV-XIV in FIG. 4; FIG.

15 is a view showing a second embodiment of the present invention and showing a vehicle rear body structure similar to that of FIG.

17 and 18 are cross-sectional views taken along lines XVII-XVII and XVIII-XVIII in FIG. 15;

* Explanation of symbols for main parts of the drawings

1: Rear frame assembly 1a, 1b, 45: Side frame

2a, 2b: wheel room 3a, 3b: side jaw

4, 4a, 4b, 44: bottom panel part 4c: small shelf

6: propulsion shaft 9: trunk

11: spare tire chamber 11a: side wall

13: 1st fuel tank 14a, 14b, 19a, 19b: metal band

24, 25, 26: frame member next to the flat bottom

29: horizontal member 30: reinforcement

41: body structure

BACKGROUND OF THE INVENTION The present invention generally relates to automobile body structures, in particular automobile rear body structures. In general, a vehicle rear body structure consists of a rear frame assembly in which the vehicle extends longitudinally and the rear bottom panel is mounted thereon.

JP-A 63 (1988) -37332 discloses a rear cabin chair to raise the rear package tray upwards through a fuel tank located directly below the raised rear floor and an raised rear floor. The use of a rear bottom extending back from the assembly is described.

The shape of the vehicle rear body structure described in the above publication is capable of accommodating an extended volume fuel tank having a sufficient rigidity in a limited space between the ground on which the vehicle is driven and the lower surface of the rear floor panel. There is an advantage.

In addition, attempts have been made to increase the volume of the trunk by increasing the height of the frame near the rear wheel housing in order to increase the volume of the trunk in the automobile body structure and then lowering the height of the frame under the fuel tank.

However, in the conventional structure, since the fuel tank is surrounded by the panel member constituting the rear wheel housing of the automobile, there is a problem that it cannot be protected from damage when a side impact is applied.

In addition, according to the prior art, since the rigid frame is constant in strength over the entire length, when other vehicles collide at the rear side as well as side collision, the rear suspension is greatly deformed by damaging not only the side frame of the vehicle body but also the axle connected to the frame. If the shape of the rear suspension is deformed, the car can no longer drive.

Therefore, in view of the above problem, the present invention has as its first object to improve the vehicle body structure constructed and installed to effectively protect the fuel tank from damage occurring in the event of an automobile crash.

Another important object of the present invention is to ensure that the side frame is flexed in the vicinity of the fuel tank in the vicinity of the rear suspension extended suspension device when the vehicle collides in the rear body structure of the vehicle so as to minimize possible damage to the front and rear side frames. The parts are designed to have different strengths.

The rear side frame according to the aspect of the present invention for achieving the above object is a side frame arranged in parallel extending in the longitudinal direction, each side frame is extended upward from the rear wheel axle connected to extend the front end horizontally It consists of a middle section of each side frame raised, an inclined back up and an inclined back down and a rear end extending horizontally.

The rear body structure also consists of a rear floor panel mounted on the rear side frame, and on the horizontally extended side frame, the floor mounted on the rear floor panel part and the rear beveled part above the rear beveled part of the side frame. And a rear part tray tray portion extending substantially horizontally to the rear of the panel portion. At least the fuel tank is located at least behind the raised part of the panel and below the rear prop shelf of the rear bottom panel.

Each part of the side frame extends outward from the side of the fuel tank, in order to effectively protect not only the panel member but also the fuel tank housed part of the side frame in the event of an automobile crash.

According to still another aspect of the present invention, the side frame is provided with a difference in strength at the front and the rear, respectively, to minimize the impact on the fuel tank and the front parts while effectively bending the weak portion in the rear collision. have.

The difference in the structural strength of the front and rear parts of each side frame can effectively bend the side frame from the load applied in the event of a collision, minimizing damage to other parts or suspensions located in front of the body.

The most important thing according to the invention is that it can effectively reduce the damage that can be inflicted on the fuel tank.

EXAMPLE

13 to 14 are first embodiments of the present invention. As shown in FIG. 2, the vehicle rear body structure shown in the above-described drawing extends at a predetermined interval in the longitudinal direction at the rear of the vehicle body structure. ), And a rear frame assembly 1 including (1b).

The left and right rear wheel chambers 2a and 2b are respectively defined to the outside of the side frames 1a and 1b and are connected to the side jaws 3a and 3b extending in the longitudinal direction of the vehicle body structure. The side frames 1a and 1b are firmly connected to the front end to the combined side jaws 3a and 3b.

As shown in FIGS. 1 to 3, the rear bottom panel 4 is mounted on the side jaws 3a and 3b and the side frames 1a and 1b. The rear bottom panel 4 is a bottom panel part 4a, an inclined panel part 4b inclined upwardly from the bottom panel part 4a and a rear part shelf 4c extending horizontally from the inclined panel part 4b. It is made up of monoliths. The bottom panel portion 4a extending substantially horizontally supports the rear seat sheet 5 and extends in the vehicle body length direction so that the tunnel 7 located in the middle of the width of the bottom panel 4a receives the propulsion shaft 6. The inclined panel portion 4b extending upward from the bottom panel portion 4a extends along the rear side of the rear seat sheet in a form separated from the rear frame assembly 1.

The inclined panel portion 4b extends in the horizontal direction at the height of the backrest of the rear seat to constitute the accessory shelf portion 4c.

As shown in FIGS. 1, 3 and 4, the trunk side panel 8 is located behind the inclined panel portion 4b of the bottom panel 4 and is flush with the vertical panel portion 8a. It consists of the panel part 8b of the.

This panel 8 is used as the trunk 9. The panel portion 8a of the panel 8 between the wheel housings 2a and 2b has a front end fixed to the middle portion of the inclined panel portion 4b and has a panel 8b extending rearward.

Therefore, the panel portion 8a between the wheel housings 2a and 2b has a space 10 for receiving the first fuel tank 13 below. The trunk, that is, the bottom panel portion 8b of the panel 8, is placed on the side frames 1a and 1b of the frame assembly located at predetermined intervals. The bottom panel portion 8b is formed with a groove for accommodating the spare tire in the middle portion.

The volume of the first fuel tank is larger than the fuel tank 18 to be described later, as shown in Figs. 2 and 3, and the fuel tank is held by a pair of metal bands 14a and 14b. At the bottom of the first fuel tank is located a differential gear device 15 comprising an input shaft driven by the propulsion shaft 6 and a pair of axial force shafts driving the rear drive wheels 17a, 17b.

As shown in FIGS. 1 to 3 and 5, the second fuel tank 18 having a smaller capacity than the first fuel tank 13 described above has one side and a bottom panel portion 4a of the bottom panel 4. It is located under the tunnel 7, and is fixed by a pair of metal bands 19a and 19b. The second flat fuel tank 18 supported as described above is located slightly below the first fuel tank 3.

The first and second fuel tanks 13 and 18 are fuel pipes so that fuel is supplied from the first fuel tank to the second fuel tank due to the head pressure while fuel is supplied to the engine by the pump from the second fuel tank. Connected by The first fuel tank 13 is equipped with a fuel inlet 21.

As shown in Figs. 2 and 5, the bottom panel portion 4a, which forms the rear bottom panel 4, reduces noise caused by the flow of engine exhaust gas through the exhaust system of the vehicle. The silencer is mounted. This silencer is located on one side opposite the propulsion shaft 6 away from the second fuel tank 18, and as shown in FIG. 2, respectively, of the vehicle body structure on the same side as the propulsion shaft 6 and the front silencer 22, respectively. It has at least one exhaust pipe extending longitudinally rearward.

The side frames 1a and 1b are extended so as to face outwards of the first fuel tank 13, respectively, as shown in FIG. 2 and FIG.

Specifically, the side frames 1a and 1b extending from the rear end of each side jaw 3a and 3b that are joined to each rear axle 16a and 16b are approximately near the front of the wheel room 2a and 2b. Is bent upward toward the first fuel tank 13 and then bent at a position adjacent to the engagement side of the first fuel tank 13 to traverse the wheel compartments 2a and 2b along the engagement side of the first fuel tank and then And finally bend at the rear position of the wheel compartments 2a and 2b to extend substantially horizontally in the rear direction of the vehicle body structure. The rear end of each of the side frames 1a and 1b extending horizontally in the rearward direction of the vehicle body structure is used to support the lower portion 8b of the trunk panel 8.

Each side frame member 1a, 1b is welded to the inner surface of the wheel compartment 2a, 2b, as shown in FIG. 2, and several flat bottom side frame members 24, as shown in FIG. (25) and (26).

6 to 9, each of the side frame members 1a and 1b will be described in detail. However, since the side frames 1a and 1b have a similar structure except that they are symmetrically installed with respect to the longitudinal axis of the vehicle body structure, only one side frame 1b of the side frames 1a and 1b is referred to. . The side frame member 24 for each side frame 1b (or 1a) has a vertical wall 24a and is installed along the engaging wheel room 2b (or 2a).

As shown in FIG. 8, the outer surface of the side frame member 24 is located between the wheel compartment 2b (or 2a) and the wheel compartment 2b (or 2a) and the wheel compartment 2b. In the front of () (or (2a)) is welded to the adjacent position of the engaging side jaw (3b) (or 3a). The side frame member 25 extends from the front end of the side frame member 24 in front of the vehicle body structure and extends along the engagement side jaw 3b (or 3a) and the side frame member 24.

6 and 9, the side frame member 25 includes the side jaw 3b (or 3a) at the front position of the side frame member 24 and the side frame member 24 described above. Is welded to the side frame member 24 at a position adjacent to the shear.

These portions of the side frame member 25 welded to the engagement side jaw 3b (or 3a) and the side frame member 24 serve to guide the inclined bottom portion 4a of the rear bottom panel 4. . In addition, the portion of the side frame member 25 extending backward from the front end of the side frame member 24 is fixed to the side frame member 24, as shown in Figs. ) Approximately represents a closed cross section. The rear end of the side frame member 25 has a stepped bottom, as shown in FIG. On the other hand, the side frame member 26 is a structure in which the upper portion of the U-shaped hole is substantially extended to the rear of the vehicle body.

The side frame member 6 has a somewhat curved front end and is inserted into the closed end therebetween by the side frame members 24 and 25 and terminates near the front end of the side frame member 24.

The front end portions of the side frame members 26 inserted between the closed end surfaces between the side frame members 24 and 25 are respectively located at both sides of the side frame members 24 and 25 at adjacent positions of the open ends of the closed end faces. While being welded, the rear end of the side frame member 26 located at the rear of the side frame member 24, as shown in Figs. 6 and 10, shows the bottom panel 8b of the trunk panel 8 from below. Used to support

As in the case of the rear end of the side frame member 25, the portion of the side frame member 26 entering the closed end surface between the side frame members 24 and 25 is stepped like the shape of the rear end of the side frame member 25. The positional alignment of the side frame member 24 with respect to the side frame member 25 can be quickly achieved during assembly of each side frame 1b or 1a.

As shown in FIG. 11 and FIG. 12, each side frame 1b (or 1a) is provided with an approximately extended suspension support bracket 28 to support the suspension 27. As shown in FIG.

The suspension support brackets 28 are provided with respective bushes 28a and 28b on both sides thereof, along with the bushes 28b suspended from the side frames 1b (or 1a). It works by 1b) (or (1a)).

Although the method of supporting the bush 28a of the suspension support bracket 28 has not been described in detail, such a bush 28b of the suspension support bracket 28 is in a rear position with respect to the side frame member 25. It is supported by the lower part of the side frame member 26.

4 and 11 to 14, the portions extending between the side frames 1a and 1b located below the bottom panel 8b of the trunk panel 8 are each side frame 1a. ), (1b) has a horizontal member 29 that is firmly connected to both ends of the side frame member 26 to face the bush (28b) of the suspension support bracket (28). In (29b) this horizontal member 29 is formed in a substantially U-shaped cross section, and the horizontal member 29 is well known in the art as shown in FIGS. 4, 12 and 13. In this manner, the two end portions which are in close contact with the bottom surface of the bottom panel 8b of the trunk panel 8 are different.

The intermediate part of the horizontal member 29 facing the sidewall 11a, which is the spare tire storage groove 11, is twisted with respect to both ends thereof so that the open end can contact the sidewall 11a of the spare tire storage groove 11. It is.

As is well shown in Fig. 4, since the horizontal member is provided with its middle part twisted at both ends thereof, both ends of the horizontal member positioned between the side frames 11a and 1b and the side wall 11a, respectively, are It extends to the rear of the vehicle body structure inclined in the above-described direction with respect to the twisted intermediate portion of.

In order to effectively provide the rigidity against the load imposed on the horizontal member 29, the inclination direction of each end of the horizontal member 29 is inclined by the respective suspension device 27 in the inward direction of the width direction of the body structure. It is preferable to select so as to incline in the rear direction of the required vehicle body structure (indicated by dashed line in FIG. 2).

Reference numeral 30 denotes a reinforcement supported between the adjacent ends of the horizontal members 29 and the side frame members 26 of the respective side frames 1a and 1b.

Therefore, according to the above-mentioned preferred expression of the present invention, the rear bottom panel 4 is a single body composed of the inclined panel portion 4b and the rear accessory shelf portion 4c, and the inclined panel panel portion 4b and the rear accessory shelf portion. By increasing the tightness of the sealing plate constituted by (4c), it is possible to sufficiently prevent the fuel of the fuel tank 13 from seeping into the vehicle interior (R) due to the impact during an automobile crash.

The monolithic structure of the rear bottom panel 4 composed of the inclined panel portion 4b and the rear accessory shelf portion 4c effectively eliminates the need for the components to be coupled and installed, respectively, to facilitate assembly of the vehicle body structure.

By mounting the second fuel tank on the bottom of the bottom panel 4a of the rear bottom panel 4, which is the rear seat portion to be mounted, it maximizes the utilization of the most space among existing vehicles, and can be mounted on a compact car having such a space.

The use of two fuel tanks, namely the first fuel tank 13 and the second fuel tank 18, increases the amount of fuel irrespective of the size of the vehicle, and thus can drive continuously by increasing the vehicle travel distance. .

In the embodiment of the present invention, the first fuel tank 13 is of a standard capacity required for a vehicle that is continuously operated beyond a desired distance, whereas the second fuel tank 18 is the first fuel tank 13. The second fuel tank 18 may not be used for additional purposes.

Accordingly, the second fuel tank 18 may have an advantage in structure and installation so that the rear bottom panel 4 may have a substantially flat shape and as long as an appropriate height is maintained from the ground to the bottom of the bottom of the second fuel tank 18. It can be provided sufficiently under the bottom panel part 4a of the.

In the width direction of the second fuel tank 18, the front silencer 22 and the vehicle body structure, which is an embodiment of the present invention, the side of each propulsion shaft 6 and the bottom of the bottom panel portion 4a of the rear bottom panel 4 All installations, such as the exhaust device 23, do not have any obstacles compared with the conventional space use.

Further, according to the embodiment of the present invention described above, the side frames 1a and 1b of the frame assembly 1 extend in accordance with the curvatures of the respective wheel chambers 2a and 2b to extend the respective wheel chambers ( Since the wheels 2a and 2b are partially welded to 2a) and 2b, the wheel chambers 2a and 2b are firmly supported by the side frames 1a and 1b to increase rigidity and to be imposed from the suspension device 27. It will be able to withstand the load with sufficient physical strength.

Since each side frame 1a and 1b of the frame assembly 1 are constituted by separate side frame members 24 and 26, each side frame 1a and 1b is a combined wheel room 2a. ) And (2b) can be configured quickly without difficulty along the complicated shape of the shape and the side frame members 24 to 26 forming the respective side frames (1a) and (1b) is a side frame member ( When 24) to 26 are joined together, they serve to exhibit the same shape along the complicated curved shapes of the coupling wheel chambers 2a and 2b.

Furthermore, according to the above-described embodiment of the present invention, in the side frames 1a and 1b having the installation and structure as described above, the side frames 1a and 1b are respectively the The support bracket 28 extends across the installed position so that the suspension support bracket 28 is well supported by the side frames 1a and 1b, respectively.

This system allows the side frames 1a and 1b to be firmly supported against the suspension support bracket 28, with the rear to give the suspension a suitable support strength. As a result, the side frames 1a and 1b employed in the practice of the present invention can effectively support larger loads than those applied by conventional suspensions.

In addition, the horizontal member 29 is in such a shape and position that the flange of the middle portion of the horizontal member 29 adjacent the corner boundary wall 11a is firmly fixed to the corner boundary wall 11a and the flanges of both ends of the horizontal member 29 are fixed. Is roughly twisted relative to its middle part and is firmly fixed to the bottom of the panel end face 8b from below, and the open end 29b of the horizontal member 29 is formed by the corner boundary wall 11a and the panel end face 8b. It is sealed.

For this reason, the welding direction is performed to closely contact the flange of the middle portion of the horizontal member 29 to the side wall 11a, and the respective flanges of both ends of the horizontal member 29 are welded to fix the bottom surface of the panel end surface 8b. Since the directions are different from each other, the panel portion 8b is given sufficient rigidity to withstand the torsion acting from all directions.

This is also the result of an increase in the physical strength with respect to the load added by the suspension 27.

Second Embodiment

A second embodiment of the present invention will be described with reference to FIGS. 15 to 18. FIG.

The second embodiment of the present invention is specially designed to set different strengths of the front and rear ends of the side frame assembly in order to effectively minimize the transmission of the force applied to the fuel tank on the rear body structure during the collision of the vehicle.

15 and 16, the rear body structure of the vehicle includes a fuel tank 43 located at the rear of the rear bottom panel 44 and in particular an inclined panel portion for maximizing the capacity of the trunk 42 (41). ) Is integrated. The rear body structure also extends longitudinally with respect to the body structure and comprises a rear frame assembly 45 composed of left and right frames of substantially the same structure integral with approximately 45, wherein the frame 45 is described above. Each of the rear ends, which are usually horizontally extended to a relatively low position on the ground when the vehicle is running, and where each front end and each rear wheel, which extends below the rear passenger seat assembly 55, are located in the middle It is designed to have a shape so that the part is raised upward.

In particular, each of the side frames 45 extends substantially horizontally just below the cabin seating assembly 55 from the leading edges horizontally extended at predetermined intervals along the raised panel portions of the rear floor panel 44. Spare part for extending the rear side and extending rearward and downward from the upwardly inclined portion of the rear, rear end portion extending horizontally from the rearward inclined portion and the spare tire 53 for accommodating It is located in each side surface of the tire chamber 54.

Each rear, upper and lower inclined portion of each side frame 45 is located where it is housed so that the combined rear wheels 48 can operate. The side frames 45 have their opposite ends fixed to the inclined portions at the rear upper portions of the combined side frames 45 and are connected together at intervals as the front transverse members 47, the combined The opposite ends are connected together at intervals as rear cross members 48 to the rear slanted portions of the respective side frames 45, and both the front and rear cross members 47 and 48 are described above. It extends in the width direction of the structure 41. Known differential gears 49 and rear suspensions (not shown) are provided at both ends between the lower confined space of the fuel tank 43 and the inclined portions of one side frame 45 and the other frame 45. It is supported in place by the rear suspension traverse member 50 coupled to the side frame 45.

The fuel tank 43 located behind the seat of the rear cabin seating member 55 is located above the automatic gear unit 49, and has a pair of tank mounting members extending longitudinally to the rear body structure at a distance of mutually spaced intervals. The tank mounting member 51 is firmly attached to the front and rear cross members 47 and 48 at opposite ends thereof.

In the above-described embodiment of the present invention, the fuel tank 43 supported as described above is located behind the inclined portion of the fuel bottom panel 44 and is a flat bottom which covers the fuel tank 43 and a flat tire storage groove. It is covered by the trunk panel 52 including the panel. In order for each side frame 45 to have each section having a different cross stiffness, the area of each side frame 45 is approximately less stiff in cross section than the horizontally extending rear end of each side frame 45. It is designed.

The boundary between the low cross-sectional stiffness zone of each side frame 45 and the high cross-sectional stiffness zone of each frame 45 is indicated by the line A of the images of Figs. 15 and 16, It will be located near the curvature point between the horizontally extending rear end of each side frame 45.

This can be done by selection of horizontally extending front and rear, up and down inclined portions and the front section of each side frame 45, each side frame 45 comprising a horizontally extending rear end. In order to have a larger partition ratio than the rear section of the rear panel, the selection of the front section of each side frame 45 may be made to increase the thickness of the wall of the rear section of each side frame 45 or the front section of each side frame 45. The reinforcing member may be attached or these two methods may be used in combination.

FIG. 17 shows a cross section of the rear section of each side frame 45 according to line XVII-XVII in FIG. 15.

As shown here, the rear section 45 of each side frame 45 is composed of a frame portion 91 of a U-shaped cross section approximately opened upwards and welded thereto with a flange extending outwardly. It has a flat plate member 92 mounted on the U-shaped cross-section frame member 91 which is designed to close the open end of the frame member 91 as a flange, and the rear section of each side frame 45 is generally As a result, the lower portion of the frame member 91 has a closed depression 80 which shows increased strength. 18 shows a cross section of the front section of each side frame 45 along the line XVII-XVII in FIG. 15.

As shown here, the front section of each side frame 45 has a frame member 91 having a substantially U-shaped cross section, no flange, and a frame member 91 via a torque box 93. It is similar to the structure of the rear section of each side frame 45 of FIG. 17 except that it is firmly fixed to the associated side portion of the lid panel portion of FIG.

As shown here, the torque box 93 is composed of an L-shaped frame member 93a having an approximately vertical wall and a horizontal wall, and a flat member 93b opposite to the vertical wall.

The torque box 93 is the associated side of the overlapping panel portion of the trunk panel 52 and the aforementioned L L welded to the frame member 91 so as to be bounded by recesses 90 normally closed therebetween. It is sandwiched between the frame member 91 having the horizontal wall of the female frame member 93a, while the flat member 93b has an L-shaped frame member (L) with the trunk defining panel 52 and the flat member 93b. It is welded to the upper part of the lower surface of the overlapping part of the trunk panel 52 and the lower part of the outer side of the frame member 91 so as to limit the closed recess 94 defined by 93a).

Different strengths were provided between each rear section of the side frame 45, such as each front section of the side frame 45, so that the rear of the other vehicle collides with the front of the Han Chinese vehicle, and the impact is applied to the rear of the vehicle. When turned off, the side frame 45 is effectively bent at the boundary A between each low cross-sectional stiffness zone of each side frame 45 and the respective high cross-sectional stiffness zone of the frame 45 so that the fuel tank 43 is located in front of the boundary A. It will be readily appreciated that the transmission of impacts to and from other parts of the vehicle body structure can be minimized.

Since the frame member 91 of the substantially U-shaped cross section in the rear section of each side frame 45 is located under the flat plate member 92, the rear section of each side frame 45 is the frame member 91. It should be noted that the increased stiffness is shown in the lower region of the closed dent 90 bounded by the flat plate member 92.

In this regard, even if the impact caused by the end-to-end impact of the vehicle is applied to the rear body structure, which is the point indicated by arrow A in FIG. 15 that is higher than the level of boundary A of each side frame 45, each side frame 92 ) Can be reliably tightened upwards in the direction of the flat plate member 92 to avoid the possibility of damaging the front section of the rear frame part.

According to the second embodiment of the present invention, it is possible to effectively minimize the deformation of their peripheral devices including the fuel tank 43 located between any rear support device or the rear support device as described above.

There is a difference in stiffness between the front and rear sections of each side frame, which effectively promotes tightening of each side frame to create a boundary between them, minimizes damage to the front side of the vehicle body structure, and also geometrically supports the Damage to the support device to be deformed to such an extent that would cause difficulty in restoration can be minimized.

The most important point according to the invention is that the possibility of damage to the fuel tank can be advantageously minimized. In addition, although described in detail with reference to the embodiment, please note that it is obvious that various changes and modifications to the technique.

For example, the rear end of each side frame employed in the first embodiment of the present invention may be constructed in a manner similar to that shown and described according to the second embodiment of the present invention.

In addition, the idea of using the second fuel tank used in the first embodiment of the present invention is equally applicable to the second embodiment of the present invention. It is, therefore, to be understood that such changes and modifications are defined by the appended claims of the present invention and are included within the scope of the present invention without departing from it.

Claims (2)

The rear body structure 41 of the motor vehicle has a front end portion extending horizontally with the side frames 1a and 1b extending horizontally to the rear of the body structure and a portion which is generally inclined upward toward the rear. Each side frame is mounted on the middle and rear side frames raised rearward from the rear axle to have a rear end portion that extends backwards horizontally and rearward toward the rear and rear. Floor panels mounted on horizontally extended front end portions, inclined panels partially mounted on inclined parts toward the rear of the side frame, horizontally extending to the top and bottom sides of the side frame toward the rear of the body A rear bottom panel and at least one fuel tank including a rear accessory shelf and the like are located behind the inclined panel of the rear bottom panel 4 and below the rear accessory shelf 4c. A rear body structure, characterized in that the intermediate portions of the frames (1a) and (1b) are configured to be located outward adjacent to each side of the fuel tank. Rear body of the vehicle inclined upward from the installation site of the rear wheels 16a, 16b of the left and right rear side frames 1a, 1b extending in the front and rear direction of the vehicle, and having a fuel tank 43 installed thereon. The rear body structure of a vehicle according to the structure (41), wherein the rigidity of the cross section of the side frame is set higher than the cross section rigidity of the rear side frame on the rear trunk compartment (42) side.