JP2011111124A - Rear structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow an auxiliary machine for a vehicle to be steadily mounted in the vehicle with a simple configuration. <P>SOLUTION: A rear structure is used for the vehicle which comprises: a kick-up part 12 that extends upward from the rear end part of a front floor panel 11; a rear floor panel 13 that extends backward from an upper part of the kick-up part 12; a vehicle sheet 15 placed on the rear floor panel 13; a front side cross member 18 placed in such a way as to extend in the vehicle width direction at the rear side of the kick-up part 12; a rear side cross member 19 placed in such a way as to extend in the vehicle width direction at the rear side of the vehicle sheet 15, at the downward side of the rear floor panel 13. The rear structure has an intermediate cross member 20 placed so as to extend in the vehicle width direction between the front side cross member 18 and the rear side cross member 19, and the intermediate cross member 20 supports auxiliary machines consisting of a battery 4 and the like. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention provides a vehicle including a kick-up portion extending upward from the rear end portion of the front floor panel, a rear floor panel extending rearward from the upper portion of the kick-up portion, and a vehicle seat installed on the rear floor panel. This relates to the rear structure.

  Conventionally, as shown in Patent Document 1 below, a front side member, a dash lower cross member, and a dash lower cross member are provided for the purpose of having sufficient strength for battery mounting and enabling stabilization of energy absorption by the front side member. In the vehicle body lower structure having left and right side sills, rear seat cross members, left and right rear side frames, and rear cross members, an extension member for connecting the dash lower cross member and the rear seat cross member is provided behind the front side member, A tunnel member is provided at a substantially central position in the vehicle width direction to connect the dash lower cross member and the rear seat cross member. A battery mounting frame including a plurality of battery members is provided between the rear seat cross member and the rear cross member. With the tip combine to abut the rear end of each of the extension member and the tunnel member, to mount movably have been made to the rear end to the vehicle longitudinal direction.

  Further, as shown in Patent Document 2 below, for the purpose of improving the rigidity and strength of the vehicle body against a side collision without increasing the size of the battery, the battery is placed before and after the battery placed on the floor panel. The front floor cross member and the rear frame, which are fixing means, are installed so as to extend along the vehicle width direction, and both end portions in the vehicle width direction of the front floor cross member and the rear frame are set as rockers (side members). It has been fixed.

JP-A-6-32247 JP 2003-170748 A

  In the vehicle body lower structure disclosed in Patent Document 1, a vehicle auxiliary machine including a battery for an electric vehicle is mounted between a rear seat cross member and a rear cross member via a battery mounting frame having a complicated structure. As a result, there is a problem in that the assembly work of the battery mounting frame, which is the mounting portion of the vehicular auxiliary machine, is complicated and it is inevitable that the weight of the vehicle body increases.

  Further, in the battery mounting structure disclosed in Patent Document 2, since the battery is configured to be placed on the floor panel, the aesthetic appearance of the vehicle interior is impaired, and maintenance of the vehicle auxiliary equipment including the battery is performed. When inspecting or exchanging, the operator has to enter the vehicle compartment and perform an exchange operation or the like, and there is a problem that the vehicle cabin is easily dirty or damaged.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a vehicle rear structure that can stably mount a vehicle auxiliary machine on a vehicle with a simple configuration.

  The invention according to claim 1 includes a kick-up portion extending upward from the rear end portion of the front floor panel, a rear floor panel extending rearward from the upper portion of the kick-up portion, and a vehicle seat installed on the rear floor panel; A front cross member installed so as to extend in the vehicle width direction on the rear side of the kick-up portion, and after being installed so as to extend in the vehicle width direction on the lower side of the rear floor panel and on the rear side of the vehicle seat. A vehicle rear structure having a side cross member, and having an intermediate cross member installed so as to extend in the vehicle width direction between the front cross member and the rear cross member. It supports auxiliary machinery.

  According to a second aspect of the present invention, in the rear structure of the vehicle according to the first aspect of the present invention, a fuel tank that stores fuel supplied to the internal combustion engine is disposed in front of or behind the intermediate cross member. .

  According to a third aspect of the present invention, in the rear structure of the vehicle according to the first or second aspect, the internal combustion engine for power generation, the generator driven by the internal combustion engine for power generation, and charging by energization from the power generator A fuel tank for storing fuel supplied to the internal combustion engine for power generation, and the battery. It is arranged before and after the cross member.

  According to a fourth aspect of the present invention, in the rear structure of the vehicle according to the third aspect, a battery is disposed in front of the intermediate cross member and a fuel tank is disposed behind the intermediate cross member. is there.

  According to a fifth aspect of the present invention, there is provided the rear structure of the vehicle according to any one of the second to fourth aspects, wherein the intermediate cross member and the front cross member or the rear cross member are connected to each other. Further, the fuel tank is supported by a long metal member.

  According to a sixth aspect of the present invention, in the rear structure of the vehicle according to any one of the third to fifth aspects, the battery is detachably installed from below the vehicle in a state of being accommodated in a battery case. Is.

  The invention according to claim 7 is the rear structure of the vehicle according to any one of claims 1 to 6, wherein the intermediate cross member is disposed in the vicinity of a mounting portion of a rear suspension that supports the rear wheel. is there.

  According to an eighth aspect of the present invention, in the rear structure of the vehicle according to the first aspect of the present invention, batteries are respectively disposed before and after the intermediate cross member.

  According to the first aspect of the present invention, an intermediate cross member is disposed between a front cross member and a rear cross member installed so as to extend in the vehicle width direction on the lower side of the rear floor panel. Since the auxiliary equipment is supported, there is an advantage that the auxiliary equipment for heavy vehicles can be stably supported while ensuring the rigidity of the vehicle body at the time of side collision and rear collision of the vehicle.

  In the invention according to claim 2, since the vehicular auxiliary machine including the fuel tank that stores the fuel supplied to the internal combustion engine is disposed in front of or behind the intermediate cross member, the intermediate cross is used as a support member for the fuel tank. The member can be used, and there is an advantage that the fuel tank having a predetermined weight can be stably supported in the space below the rear floor panel.

  In the invention according to claim 3, the internal combustion engine for power generation, the generator driven by the internal combustion engine for power generation, the battery that can be charged by energization from the power generator, and the drive wheel by the power supplied from the battery In the series type hybrid vehicle having an electric motor for driving the battery, there is an advantage that the battery or the fuel tank can be mounted using the space below the rear floor panel effectively.

  In the invention according to claim 4, since the battery is disposed in front of the intermediate cross member and the fuel tank is disposed behind the intermediate cross member, the fuel inlet is often installed near the rear end of the vehicle body. There is an advantage that the structure can be simplified by preventing the fuel tank and the fuel tank from being separated from each other and shortening the total length of the fuel injection pipe and the air discharge pipe for the fuel tank.

  In the invention according to claim 5, since the fuel tank is supported by the long metal member installed so as to connect the intermediate cross member and the front cross member or the rear cross member, the fuel tank Even if it is made of plastic material to reduce its weight, it can be stably supported in the space below the rear floor panel.

  In the invention according to claim 6, since the battery is installed in the battery case so as to be detachable from the lower side of the vehicle, an operation of mounting a plurality of batteries on the vehicle body or an operation of removing the battery from the vehicle body is easy. And a plurality of batteries can be stably supported on the vehicle body.

  In the invention according to claim 7, since the intermediate cross member is disposed in the vicinity of the mounting portion of the rear suspension that supports the rear wheel, the support rigidity in the vehicle width direction of the rear suspension is effectively improved by the intermediate cross member. There is an advantage that the vibration load input to the vehicle body from the rear suspension can be stably supported when the vehicle is running.

  In the invention according to claim 8, since the batteries are respectively disposed before and after the intermediate cross member, in an electric vehicle or the like that requires a large amount of battery instead of a large fuel tank, the battery is mounted on the rear floor panel. There is an advantage that it can be mounted effectively in the lower space.

It is explanatory drawing which shows schematic structure of the vehicle to which the rear part vehicle body structure which concerns on this invention is applied. It is side surface sectional drawing which shows the whole structure of the said vehicle. It is side surface sectional drawing which shows embodiment of the rear part vehicle body structure which concerns on this invention. It is a bottom view which shows the specific structure of the said rear part vehicle body structure. It is a perspective view which shows the specific structure of a rear suspension. It is a side view which shows the attachment state of a rear suspension. It is side surface sectional drawing which shows another embodiment of the rear part vehicle body structure which concerns on this invention. It is side surface sectional drawing which shows another embodiment of the rear part vehicle body structure of the vehicle which concerns on this invention. It is the IX-IX sectional view taken on the line of FIG.

  FIG. 1 shows a schematic configuration of a vehicle to which a rear vehicle body structure according to the present invention is applied. The vehicle includes a power generating internal combustion engine 1 (engine E) composed of a one-cylinder or two-cylinder small reciprocating engine or a one-rotor or two-rotor small rotary engine, and a generator driven by the power generating internal combustion engine 1. 2 (generator G), a battery 4 that can be charged by being energized from the generator 2 via the AC-DC inverter 3, and a current supplied from the battery 4 via the DC-AC inverter 5 This is a series hybrid vehicle including an electric motor 7 (motor M) that rotationally drives a wheel (front wheel) 6 and a fuel tank 8 that contains fuel supplied to the power generation internal combustion engine 1.

  The vehicle is provided with a charger 9 for charging the battery 4 using an external power source such as a household power source. The vehicle 4 travels by driving the electric motor 7 using the power previously charged in the battery 4 when the vehicle is traveling at a short distance, and the electric capacity of the battery 4 is large when the vehicle is traveling a long distance. The generator 2 is driven when the voltage drops below a certain value, and the generated current is supplied to the battery 4 for charging. Further, when the vehicle is decelerated, the battery 4 is charged by supplying a regenerative current obtained via the drive wheels 6, the electric motor 7 and the DC-AC inverter 3 to the battery 4.

  As shown in FIG. 2, the vehicle includes a dash panel 10 installed at the front part of the passenger compartment, a front floor panel 11 installed so as to extend from the lower end part to the rear side of the vehicle body, and the front floor. It has a kick-up portion 12 provided so as to rise from the rear end of the panel 11 and a rear floor panel 13 extending rearward from the upper portion of the kick-up portion 12. On the front floor panel 11, a front row vehicle seat (front row seat) 14 including a driver seat and a passenger seat is installed, and on the rear floor panel 13 on the rear side, a rear row vehicle seat ( A rear row sheet) 15 is provided. On the rear side of the vehicle seat 15, a storage portion 16 made of a sub trunk or a tire pan is formed by recessing the rear floor panel 13 downward.

  As shown in FIGS. 3 and 4, a pair of left and right rear side frames 17, 17 are installed along the lower surface of the rear floor panel 13 on the rear side of the kick-up portion 12. Between the rear side frames 17, 17, a front cross member 18 joined to the rear surface of the kick-up portion 12 and extending in the vehicle width direction, a lower side of the rear floor panel 13, and a rear side of the vehicle seat 15. A rear cross member 19 extending in the vehicle width direction is installed. An intermediate cross member 20 extending in the vehicle width direction is installed below the rear floor panel 13 between the front cross member 18 and the rear cross member 19.

  The intermediate cross member 20 includes a pair of front and rear flange portions 21 and 22 fixed by welding or the like to the lower surface of the rear floor panel 13, a front wall portion 23 and a rear wall portion 24 installed opposite to each other, It is formed in a cross-sectional hat shape by the bottom wall portion 25 disposed between the lower end portions. A plurality of batteries 4 arranged in the vehicle width direction are installed in the battery case 26 in front of the intermediate cross member 20. A fuel tank 8 is disposed behind the intermediate cross member 20 and is supported by a pair of left and right metal elongated members 27 and 27.

  The battery case 26 is installed so as to cover the lower surface of the front cross member 18 and the lower surface of the intermediate cross member 20 and extends in the vehicle width direction, and a plurality of the battery cases 26 placed on the bottom plate 28. And a cover member 29 that covers the battery 4. In the state where the battery 4 is accommodated in the battery case 26, the front side portion of the bottom plate 28 is bolted to the lower surface of the front cross member 18, and the rear side portion of the bottom plate 28 is rear side cross member. The battery 4 is detachably installed from below the vehicle in a space formed below the rear floor panel 13 between the front cross member 18 and the intermediate cross member 20 by being bolted to the lower surface of 19. It is supposed to be.

  The metal long member 27 is made of a metal belt or the like with a cushioning material (not shown) made of synthetic rubber or the like fixed to the upper surface thereof. The front end portions of the long metal members 27 and 27 are bolted in a state where the front end portions of the long metal members 27 and 27 are overlapped with the center of the lower surface of the intermediate cross member 20, and the rear end portions of the long metal members 27 and 27 are The fuel tank 8 is configured to be supported from below by being bolted to the left and right side portions of the lower surface of the rear cross member 19.

  Further, on the rear side surface of the fuel tank 8, a fuel injection pipe 32 that supplies fuel injected from a fuel injection port 31 provided on the outer surface of the vehicle body to the fuel tank 8 and air in the fuel tank 8 are supplied to the fuel injection port. The lower end of the air discharge pipe 33 that discharges in the vicinity of the inlet 31 is connected, and the fuel injection pipe 32 and the air discharge pipe 33 are installed so as to extend substantially vertically along the side part of the rear vehicle body. Yes. In one side portion of the fuel tank 8, a rear portion of an exhaust pipe 34 connected to the power generation internal combustion engine 1 disposed in front of the passenger compartment is installed so as to extend to the rear side of the vehicle body. A silencer 35 provided in the pipe 34 is disposed on the rear side of the fuel tank 8.

  Mount portions provided on the front left and right sides of the rear suspension 37 for supporting the left and right rear wheels 36, 36 are attached to the lower surfaces of the front portions of the rear side frames 17, 17. As shown in FIGS. 5 and 6, the rear suspension 37 includes a pair of left and right trailing arms 38, 38, a torsion beam 39 extending in the vehicle width direction so as to connect the trailing arms 38, 38, and A pair of left and right rear shock absorbers 40, 40 that suspend the trailing ends of the trailing arms 38, 38 are provided. The left and right end portions of the intermediate cross member 20 are disposed in the vicinity of the mounting portion of the rear suspension 37 with respect to the rear side frames 17, 17, specifically in the vicinity of the front end portion of the trailing arm 38.

  As described above, the kick-up portion 12 extending upward from the rear end portion of the front floor panel 11, the rear floor panel 13 extending rearward from the upper portion of the kick-up portion 12, and the vehicle seat installed on the rear floor panel 13 15, a front cross member 18 installed to extend in the vehicle width direction on the rear side of the kick-up portion 12, and extends in the vehicle width direction on the lower side of the rear floor panel 13 and on the rear side of the vehicle seat 15. A rear cross member 19 having a rear cross member 19 installed in the manner described above, and an intermediate cross member 20 installed between the front cross member 18 and the rear cross member 19 so as to extend in the vehicle width direction. The intermediate cross member 20 supports the vehicle auxiliary equipment including the fuel tank 8 and the like. While ensuring the rigidity of the vehicle body in the rear-end collision or the like, there is an advantage that it is possible to stably support the auxiliary the vehicle.

  That is, in the above embodiment, the three cross members including the front cross member 18, the rear cross member 19, and the intermediate cross member 20 are substantially omitted along the lower surface of the rear floor panel 13 on which the rear row vehicle seat 15 is disposed. Since the rear side frames 17 and 17 can be effectively reinforced by installing them in parallel and connecting their side ends to the rear side frames 17 and 17, the impact load acting on the side impact load and the rear impact load is reduced. It is possible to effectively prevent the vehicle seat 15 from reaching the installation portion. In addition, since the deformation of the rear vehicle body during the traveling of the vehicle can be effectively suppressed, there is an advantage that the traveling stability can be effectively improved.

  By installing the rear row vehicle seat 15 on the rear floor panel 13 raised upward by providing the kick-up portion 12 between the front floor panel 11 and the rear floor panel 13, Since a vehicle auxiliary machine composed of the battery 4 or the fuel tank 8 is arranged on the front side or the rear side of the intermediate cross member 20 arranged in the space formed in the above, as a support member for the vehicle auxiliary machine The intermediate cross member 20 can be used, and there is an advantage that the vehicular auxiliary machine made of a predetermined heavy object can be mounted in the space below the rear floor panel 13.

  In the above embodiment, the internal combustion engine 1 for power generation, the generator 2 driven by the internal combustion engine 1 for power generation, the battery 4 that can be charged by energization from the generator 2, and the battery 4 are supplied. Since the present invention is applied to a series-type hybrid vehicle having an electric motor 7 that drives the drive wheels 6 with electric power, the battery 4 or the fuel tank 8 can be installed using the lower space of the rear floor panel 13 effectively. There are advantages. That is, since the series type hybrid vehicle rotates the drive wheels 6 by the electric motor 7 using the electric power of the battery 4, the internal combustion engine 1 and its fuel tank are compared with a normal gasoline vehicle or diesel vehicle. 8 etc. can be reduced in size. Further, when the electric capacity of the battery 4 decreases to a certain value or less when the vehicle travels a long distance, the generator 2 is driven by the power generation internal combustion engine 1 and the generated current is supplied to the battery 4 for charging. Therefore, the capacity of the battery 4 can be reduced as compared with a normal electric vehicle.

  Since the battery 4 and the fuel tank 8 capable of setting the capacity to a predetermined value are arranged before and after the intermediate cross member 20 as described above, the limited space formed below the rear floor panel 13 is reduced. It is possible to effectively use and stably support both the battery 4 and the fuel tank 8. Moreover, when the battery 4 is arranged in front of the intermediate cross member 20 and the fuel tank 8 is arranged behind the intermediate cross member 20 as in the above embodiment, the rear end of the vehicle body It is possible to prevent the fuel injection port 31 and the fuel tank 8 that are often installed in the vicinity of the part from being largely separated. Therefore, there is an advantage that the length of the fuel injection pipe 32 and the air discharge pipe 33 can be shortened to simplify the structure.

  Further, according to the configuration in which the fuel tank 8 is supported by the long metal members 27 and 27 installed so as to connect the intermediate cross member 20 and the front cross member 18 or the rear cross member 19, Even when the fuel tank 8 is reduced in weight by being formed of a plastic material, it can be stably supported in the space below the rear floor panel 13.

  Furthermore, in the above embodiment, the battery 4 is installed in the battery case 26 so as to be detachable from the lower side of the vehicle. Therefore, an operation for mounting a plurality of batteries 4 on the vehicle body, an operation for removing the batteries 4 from the vehicle body, etc. There is an advantage that the plurality of batteries 4 can be stably supported on the vehicle body.

  Further, as shown in the above embodiment, the intermediate cross member 20 is provided in the vicinity of the attachment portion of the rear suspension 37 that supports the rear wheel 36, specifically, in the vicinity of the front end portion of the rear suspension 37 attached to the rear side frame 17. According to the structure in which the rear suspension 37 is supported, the support rigidity in the vehicle width direction of the rear suspension 37 can be effectively improved by the intermediate cross member 20, and the vehicle is input from the rear suspension 37 to the vehicle body when the vehicle is traveling. There is an advantage that a vibration load or the like can be stably supported.

  Instead of the above-described embodiment in which the battery 4 and the fuel tank 8 are arranged separately at the front and rear of the intermediate cross member 20, as shown in FIG. It may be configured to be installed before and after the intermediate cross member 20 in a state of being accommodated in each of the members 26. In this case, in an electric vehicle or the like that requires a large-capacity battery 4 instead of the need for the fuel tank 8 for the internal combustion engine, the battery 4 can be effectively mounted in the lower space of the rear floor panel 13. There is.

  Further, a pair of front and rear flange portions 21 and 22 fixed to the lower surface of the rear floor panel 13, a front wall portion 23 and a rear wall portion 24 installed opposite to each other, and a bottom disposed between the lower ends thereof. Instead of the above embodiment in which the cross-sectional hat-shaped intermediate cross member 20 formed of the wall portion 25 is provided, as shown in FIGS. 8 and 9, an intermediate cross member formed of a round pipe material 41 or a square pipe material or the like, The rear side panel 17 is installed so as to extend in the vehicle width direction between the front cross member 18 and the rear cross member 19 installed on the lower side of the rear floor panel 13, and a mounting plate 42 provided on the side end thereof is attached to the rear side frame 17. It may be a structure fixed to the side surface. In this case, there is an advantage that an installation space for the harness 43 and the like can be secured above the intermediate cross member made of the round pipe member 41 and the like.

DESCRIPTION OF SYMBOLS 1 Internal combustion engine for electric power generation 2 Generator 4 Battery 6 Drive wheel 7 Electric motor 8 Fuel tank 11 Front floor panel 12 Kick-up part 13 Rear floor panel 15 Vehicle seat 18 Front side cross member 19 Rear side cross member 20 Intermediate cross member 26 Battery case 27 Metal long member 37 Rear suspension

Claims (8)

  A kick-up portion extending upward from the rear end portion of the front floor panel, a rear floor panel extending rearward from the upper portion of the kick-up portion, a vehicle seat installed on the rear floor panel, and a rear side of the kick-up portion And a rear cross member installed so as to extend in the vehicle width direction on the lower side of the rear floor panel and on the rear side of the vehicle seat. A rear structure having an intermediate cross member installed so as to extend in the vehicle width direction between the front cross member and the rear cross member, and supporting the vehicle auxiliary machine by the intermediate cross member; The vehicle's rear structure is characterized.   2. The rear structure of the vehicle according to claim 1, wherein a fuel tank for storing fuel supplied to the internal combustion engine is disposed in front of or behind the intermediate cross member.   An internal combustion engine for power generation, a generator driven by the internal combustion engine for power generation, a battery that can be charged by energization from the generator, and an electric motor for a hybrid vehicle that drives drive wheels by current supplied from the battery 3. The vehicle according to claim 1, wherein a fuel tank for storing fuel supplied to the power generation internal combustion engine and the battery are disposed before and after the intermediate cross member. Rear structure.   4. The vehicle rear structure according to claim 3, wherein a battery is disposed in front of the intermediate cross member, and a fuel tank is disposed behind the intermediate cross member.   5. The fuel tank is supported by a long metal member installed to connect the intermediate cross member and the front cross member or the rear cross member. The vehicle rear structure according to any one of the above.   The vehicle rear structure according to any one of claims 3 to 5, wherein the battery is installed in a battery case so as to be detachable from below the vehicle.   The vehicle rear structure according to any one of claims 1 to 6, wherein the intermediate cross member is disposed in the vicinity of a mounting portion of a rear suspension that supports a rear wheel.   The rear structure of the vehicle according to claim 1, wherein batteries are respectively disposed before and after the intermediate cross member.

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