JP5304711B2 - Body reinforcement structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body reinforcing structure enabling mounting of a unit housing which is part of an electric drive unit of a hybrid vehicle etc. without excessively narrowing the capacity of a cabin and capable of enhancing rigidity of a vehicle body rear part and of securing durability. <P>SOLUTION: The vehicle body reinforcing structure includes: right and left side members 4 each coupled to a lower face of a floor 2 of a vehicle C travelling by driving wheels W by a motor M and jointed to right and left ends of a cross member 3 long in the vehicle width direction X, respectively; the unit housing 8 storing a drive unit U of the motor M and having right and left ends arranged in positions above the floor 2 and above the right and left side members 4; right and left fastening parts 9 provided at the right and left ends of the unit housing 8, respectively; vertical wall parts vw of cabin opposing wall plate members 6 jointed to right and left ends of the floor 2 and forming lateral walls of the cabin R; and right and left fastening means 11 fastening the fastening parts 9 and the vertical wall parts vw to each other. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a vehicle body reinforcement structure that ensures the rigidity of a rear floor that forms a vehicle compartment at the rear of a vehicle body and left and right vehicle compartment facing wall plates.

A pair of left and right side members elongated in the front-rear direction and a cross member extending in the vehicle width direction in which the left and right ends are integrally coupled are joined to the rear floor of the rear part of the vehicle body, thereby enhancing the rigidity of the rear floor. Furthermore, the lower end of the facing wall material extending upward is welded to the left and right edges of the rear floor, and a wheel house that accommodates the upper part of the rear wheel is integrally coupled to the lower part of the facing material of the facing wall. Has been.
The vehicle interior facing wall plates, including the rear floor and wheel house, which are the rear components of the vehicle body, are welded to each other to increase the rigidity, thereby allowing the road surface reaction force from the rear wheels to pass through the shock absorber of the suspension device. Thus, when input is made to the suspension attachment portion attached to the wheel house or the side member, the input load is dispersedly supported by the vehicle body rear component member, and the durability of the vehicle body rear component member is maintained.

By the way, the electric motor mounted on the vehicle operates as a motor to accelerate the vehicle, and operates as a generator to realize deceleration, and the electric motor by the power generation output of the generator driven by the in-vehicle engine. A series hybrid vehicle that travels by driving and a series parallel hybrid vehicle that travels by using both the mechanical output of an engine and the output of an electric motor are known.
These electric vehicles, hybrid vehicles, and the like include an EV drive unit that switches an electric motor that constitutes a main part of the electric drive device as a motor or a generator. For example, in the hybrid vehicle C1 shown in FIG. 8, the upper cross member 71 is overlapped and integrally coupled to the floor 70 of the rear passenger compartment R, and the housing 72 constituting the housing that houses the EV drive unit U is placed thereon. Yes. As a result, both members are arranged in the lower portion of the rear casing R, and the left and right rising portions 711 at the left and right ends of the upper cross member 71 suppress the inclination of the casing facing wall plate 73 and the wheel house 74 toward the vehicle interior. Thus, the rigidity of the rear body constituting member is enhanced to ensure durability.

  Furthermore, in the vehicle power supply device disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2006-335243), a battery box, which is a housing containing a battery module, a downverter, and the like, is supported at the lower and upper battery portions extending in the vehicle width direction. It is attached to the left and right side members via a frame. Here, the lower and upper battery support frames that support the battery box are also used as cross members below the floor, thereby ensuring the mounting space for the battery box and the durability of the rear body constituting member.

JP 2006-335243 A

As described above, conventional electric vehicles, hybrid vehicles, and the like include a unit housing that is a relatively large casing such as an EV drive unit U and a battery box that form a part of the electric drive device. Thus, both securing the space and ensuring the durability of the rear body component are achieved.
However, the unit housing 72, which is a housing for accommodating the EV drive unit U of FIG. 8, is provided so as to overlap the upper cross member 71, the width in the height direction above the unit housing 72 is narrowed, and the luggage compartment There is a problem of narrowing the height space, and improvement is desired.

  On the other hand, in the case where the lower and upper battery support frames supporting the battery box disclosed in Patent Document 1 are also used as cross members, the cargo compartment height space is not reduced. However, in this case, since there is no member that suppresses the tilt displacement of the vehicle facing wall plate material or wheel house to the vehicle inner side above the floor, the vehicle room facing wall plate material or wheel house received a load on the vehicle side. In such a case, these members are inclined and displaced toward the inner side of the vehicle, and the side members and the floor ends tend to be twisted and displaced. In this case, durability of mutual joint parts such as a floor, a side member, a vehicle compartment facing wall plate material, and a wheel house is lowered, and improvement is desired.

  The present invention has been made on the basis of the above-described problems, and an object thereof is a unit that is a casing that forms a part of an electric drive device without excessively reducing the cabin capacity of an electric vehicle or a hybrid vehicle. An object of the present invention is to provide a vehicle body reinforcement structure that can be fitted with a housing and that can sufficiently increase the strength and rigidity of the rear portion of the vehicle body and ensure durability.

  According to a first aspect of the present invention, the left and right side members that are coupled to the lower surface of the floor of a vehicle that travels by driving wheels by a motor and that are joined to the left and right ends of a cross member that is long in the vehicle width direction A unit housing that houses the drive unit of the motor and is positioned above the floor and above the left and right side members, and a left and right end provided on the left and right ends of the unit housing. A fastening portion, a vertical wall portion of a vehicle facing wall plate member joined to left and right ends of the floor to form a side wall of the vehicle compartment, and left and right fastening means for fastening the fastening portion and the vertical wall portion to each other. It is characterized by having.

  According to a second aspect of the present invention, in the vehicle body reinforcing structure according to the first aspect, the side member is a rear side member, and at least one of the rear side member or the vehicle interior facing wall plate member is a suspension device for the wheel. An upper end connecting portion for supporting the upper end is formed.

  According to a third aspect of the present invention, in the vehicle body reinforcing structure according to the first or second aspect, a vertical reinforcing member having a vertically closed cross section is integrally coupled to a vertical wall portion of the vehicle compartment facing wall plate member, and the left and right fastening means Is characterized in that the right and left fastening portions and the vertical reinforcing member of the unit housing are fastened together.

  According to a fourth aspect of the present invention, in the vehicle body reinforcing structure according to the first, second, or third aspect, the casing-facing wall plate material is a rear quarter panel, and a rear wheel that is formed so as to bulge out from the main part in the vehicle. A vertical wall is formed on the house inner.

  According to a fifth aspect of the present invention, in the vehicle body reinforcing structure according to any one of the first to fourth aspects, an elastic bulging member is interposed in a compressed state in a gap between the floor and the unit housing disposed above the floor. It is characterized by being mounted.

  According to the first aspect of the present invention, the left and right ends of the unit housing, which is arranged above the floor and above the left and right side members, and the cross members arranged in parallel below the floor with the floor interposed therebetween. Are integrally connected to the vertical wall portions of the left and right vehicle compartment facing wall plates, so that the unit housing and the cross member function as a rigid reinforcement member arranged in the vertical direction, thereby sufficiently increasing the strength and rigidity of the rear vehicle body. It can be increased and durability can be secured. In addition, this unit housing eliminates the cross member from the upper side of the floor, and instead of this, it can function as a rigidity reinforcing member or a container for the drive unit, and the cargo space height space can be expanded by the amount of eliminating the cross member.

  According to the invention of claim 2, when the road surface reaction force from the shock absorber is input to at least one of the rear side member or the vehicle interior facing wall plate via the upper end connecting portion, the unit housing and the cross member are arranged vertically in parallel therefrom. Thus, the input load can be distributed to the rigidity reinforcing member, and the durability of the rear vehicle body including the floor and the vehicle interior facing wall plate material can be ensured.

  According to the invention of claim 3, the vertical reinforcing member is welded to the vertical wall portion of the vehicle interior facing wall plate member so as to form a vertical closed cross section, and the rigidity of the same portion is further strengthened. The rigidity reinforcing members arranged in the vertical direction are integrally coupled by the left and right vertical reinforcing members, which form a horizontally-long rectangular rigidity reinforcing frame in a side view, which can sufficiently enhance the rigidity. For this reason, even if road surface reaction force is input from the shock absorber side to the upper end connection part, the input load can be more reliably distributed to the rigid reinforcement frame body side, ensuring the durability of the rear vehicle body including the floor and the compartment facing wall plate material. it can.

  According to the fourth aspect of the present invention, the longitudinally stiffening has a longitudinally closed cross section formed in the longitudinal wall portion of the vehicle body-facing wall plate material, which is a relatively rigid rear wheel house inner formed in a bulging shape inside the vehicle. Since the members are welded, the rigidity of the horizontally-long rectangular rigidity-enhancing frame body can be further enhanced in a side view, and displacement at the time of load input to the vehicle interior facing wall plate can be more reliably suppressed.

  According to the invention of claim 5, since the lower surface of the unit housing presses the floor in a close contact state via the elastic bulging member, the elastic bulging member suppresses the displacement of the floor and from the lower motor or the like. It can exhibit functions to control vibration and reduce radiated sound on floors that are susceptible to vibration.

It is a schematic sectional drawing of the vehicle body rear part of the vehicle to which the vehicle body reinforcement structure of FIG. 1 was applied. FIG. 2 is a schematic plan cross-sectional view of a main part of a rear vehicle body to which the vehicle body reinforcing structure of FIG. 1 is applied. It is the principal part schematic of the suspension arrange | positioned at the vehicle body rear part of the vehicle to which the vehicle body reinforcement structure of FIG. 1 was applied. It is a block diagram which shows roughly the electric drive device of the vehicle to which the vehicle body reinforcement structure of FIG. 1 was applied. FIG. 2 is an enlarged longitudinal sectional view of a joint portion between a rear wheel house inner and a longitudinal reinforcing member used in the vehicle body reinforcing structure of FIG. It is an AA line expanded sectional explanatory view of FIG. FIG. 6 is an enlarged cross-sectional explanatory view taken along line BB in FIG. 5. It is a schematic sectional drawing in the rear view of the vehicle to which the conventional vehicle body reinforcement structure was applied.

Hereinafter, a series parallel hybrid vehicle (hereinafter simply referred to as a vehicle) to which the vehicle body reinforcement structure of the present invention is applied will be described.
FIG. 1 is a longitudinal sectional view of the main part of the rear part of the vehicle C in a rear view, FIG. 2 is a sectional plan view of the main part around the floor of the rear part of the vehicle, and FIG. 3 is a schematic view of the main part in a side view of the rear part of the vehicle. It is.
First, prior to the description of the vehicle body reinforcement structure, the electric drive device 18 that is mounted on the vehicle C and travels in the hybrid mode will be schematically described with reference to FIG.

  The electric drive device 18 includes a front part 181 and a rear part 182. The front component 181 includes a front motor M and a front transmission CG1 that shifts the rotation of the front motor M and transmits it to the front drive shaft DS1 of the front wheel W, and the rear component 182 shifts the rotation of the rear motor M and the rotation of the rear motor CG1. A rear transmission CG <b> 2 that transmits to the rear drive shaft DS <b> 2 of the wheel W is provided. Further, the front motor M of the front part 181 is connected to the battery BT and the generator 185 via the front inverter 183, and the rear motor M of the rear part 182 is connected to the battery BT via the rear inverter 184. Further, the mechanical drive force of the engine E1 is transmitted to the front transmission CG1 of the front component 181 via the front motor M and the clutch CH6 in a switchable manner. Moreover, the mechanical driving force of the engine E1 is branched and applied to the generator 185, and the generator 185 is driven to charge the battery BT. Here, the front and rear inverters 183 and 184 are connected to an EV control means (not shown), and are thereby controlled to switch the vehicle C in the series mode and the series parallel mode.

A vehicle body reinforcement structure of the vehicle C that can travel in such a hybrid mode will be described with reference to FIGS.
As shown in FIG. 3, the rear portion of the vehicle C includes a rear floor 2, left and right vehicle interior facing wall plates 6 that extend upward from the left and right ends thereof and form side walls of the vehicle interior, and upper end portions 610 thereof. The rear casing (loading chamber) R is surrounded by the roof 101 to which the left and right end edges are connected, and an opening (not shown) at the rear end of the rear casing R is opened and closed by the tailgate 102. The rear inner quarter panel 15 constituting the main part of the vehicle compartment facing wall plate 6 that forms the side wall of the vehicle compartment is provided with a wheel house inner 16 at the center of the lower portion, and a long window opening 151 is formed on the upper side in the front-rear direction.

As shown in FIGS. 1 and 2, the rear floor 2 has a cross member 3 that is long in the vehicle width direction Y, and a longitudinal direction X (see FIG. 2) that is joined (welded) to the left and right ends of the cross member 3 by welding. The left and right rear side members 4 are overlapped on the lower surface and welded together to enhance the rigidity on the floor side.
As shown in FIGS. 1 and 5, the left and right end edges of the rear floor 2 are respectively provided at the lower end portions of the rear inner quarter panel 15 and the rear wheel house inner 16 that form the main parts of the left and right vehicle compartment facing wall plates 6 that extend upward. Is welded.

  As shown in FIG. 1, a rear wheel house inner 16 is integrally coupled to the rear inner quarter panel 15 so as to bulge out toward the rear compartment (inside the vehicle) R. A rear wheel house outer (not shown) located outside the vehicle is overlapped and integrally coupled to the rear wheel house inner 16, thereby forming a rear wheel house (not shown) that can accommodate the upper portion of the rear wheel W. The outer edge of the rear wheel house outer (not shown) is welded to a rear outer quarter panel (not shown).

The interior portion of the rear wheel house inner 16 forms a longitudinal wall portion vw of a vehicle interior facing wall plate material. As shown in FIGS. 6 and 7, the longitudinal reinforcing member 7 is a vertically elongated member having a substantially hat-shaped cross section that is vertically long. The left and right flanges f are overlapped and welded together. The vertical reinforcing member 7 and the vertical wall portion vw form a vertical closed cross section S (see FIG. 6), whereby the rigidity of the rear wheel house inner 16 forming part of the vehicle interior facing wall plate 6 is reinforced. Yes.
Here, as shown in FIG. 5, the lower end of the vertical reinforcing member 7 overlaps the side wall of the rear side member 4 immediately below the rear floor 2 and is welded to each other.

Therefore, the left and right rear side members 4 are integrally coupled to each other by a cross member 3 that is long in the vehicle width direction Y, and the left and right rear side members 4 are connected to the left and right rear wheel house inners 16 via the left and right vertical reinforcing members 7, respectively. Are integrally coupled to each other, and the rigidity is enhanced in cooperation with the rear floor 2 supported by them.
Further, as shown in FIGS. 5 and 7, the upper end connecting portion 13 that supports the upper end portion 121 of the shock absorber 12 is integrally formed at the lower end of the vertical reinforcing member 7.
The upper end connecting portion 13 includes a receiving frame 132 having a downward mounting surface 131, a coupling piece portion 133 that is bent and extended downward from one end of the front and rear ends of the receiving frame 132 and is overlapped and welded to the lower end portion of the vertical reinforcing member 7. Is provided.

Here, when a load is applied from the upper end 121 of the shock absorber 12 to be described later to the rear wheel house inner 16 reinforced by the vertical reinforcing member 7 from the upper connecting portion 13, the load is applied from the vertical reinforcing member 7 and the rear wheel house inner 16. The rear inner quarter panel 15, the rear side member 4, the cross member 3, and the rear floor 2 are dispersed and reliably supported.
Next, as shown in FIG. 1, a unit housing 8 in which a drive unit U including a rear inverter 184 used in the rear component 182 of the electric drive device 18 is disposed above the rear floor 2.
Here, the unit housing 8 is disposed between the vertical wall portions vw of the left and right rear wheel house inners 16 constituting the vehicle compartment facing wall plate 6 that forms the side wall of the rear vehicle compartment R. As shown in FIGS. 1 and 2, the unit housing 8 is a casing made of an aluminum composite plate that is long in the vehicle width direction Y and reinforced with rigidity, and is arranged with the left and right ends positioned above the left and right rear side members 4. The

Fastening portions 9 project from the wall surfaces at the left and right ends of the unit housing 8. The fastening portion 9 is integrally coupled to the longitudinal reinforcing member 7 which is overlapped and integrated with the longitudinal wall portion vw of the opposing rear wheel house inner 16 via fastening means 11 on the left and right sides.
A gap t is maintained in almost the entire region where the lower surface of the unit housing 8 and the rear floor 2 face each other, and the elastic bulging member 14 is interposed in the gap t in a compressed state.
The elastic bulging member 14 is a felt plate material, and the lower surface of the unit housing 8 is interposed via the elastic bulging member 14 so as to apply a pressing force with the rear floor 2 in a close contact state.

  For this reason, the elastic bulging member 14 can exhibit the function of suppressing the displacement of the rear floor 2, suppressing the vibration of the rear floor 2 that easily receives vibration from the motor M or the like below, and reducing the radiated sound. . The elastic bulging member 14 may be a cork plate, a rubber plate, or a soft resin plate instead of the felt. In these cases as well, an effect similar to that obtained when the felt plate material is employed can be obtained.

As shown in FIG. 6, the fastening means 11 at the left and right ends of the unit housing 8 includes two front and rear plate-like brackets 111 and 112, and the inner end portions of the two plate-like brackets 111 and 112 are fastening portions. 9 is sandwiched from the front and the rear and bolted to each other, and the vehicle outer end is sandwiched from the front and rear and the plurality of locations are fastened to each other by bolts.
In this way, the unit housing 8 here is long in the vehicle width direction Y, and the left and right ends are positioned above the left and right rear side members 4, which is the same as a cross member (not shown) that has been conventionally provided. It can function as a rigid reinforcing member. That is, the unit housing 8 which is a rigidity reinforcing member couples the left and right rear wheel house inners 16 constituting the vehicle room facing wall plate material 6 of the rear compartment R to each other, and inward of the vertical wall portion vw of the rear wheel house inner 16. Therefore, it is possible to eliminate the cross member conventionally provided from the rear floor 2 and to function as a rigidity reinforcing member instead.

  Here, the unit housing 8 and the cross member 3 on the lower surface side of the rear floor 2 constitute a rigidity reinforcing member that is vertically arranged in parallel. For this reason, it is assumed that the road surface reaction force from the shock absorber 12 is input to the upper end connecting portion 13 integrally coupled to the lower portion, and is input to the vertical wall portion vw of the rear wheel house inner 16 constituting the vehicle interior facing wall plate 6 from this. In addition, since the load can be distributed to the rigid reinforcing member side of the unit housing 8 and the cross member 3 that are arranged vertically in parallel with each other, the durability of the rear vehicle body B including the rear floor 2 and the vehicle interior facing wall plate 6 can be obtained. Can be secured. In particular, here, the vertical reinforcing member 7 is welded so as to form a vertical closed section S on the vertical wall portion vw of the rear wheel house inner 16, and the rigidity of the same portion is further strengthened. By combining the four members of the vertical closed cross-section structure part composed of the two left and right vertical reinforcing members 7 and the unit housing 8 and the cross member 3 arranged in parallel in the horizontal direction, a two-dotted line in FIG. As shown in the drawing, a horizontally elongated rectangular rigid reinforcing frame K is formed.

The rigidity-enhanced frame K formed by the cooperation of these four members can sufficiently enhance the rigidity of the rear part of the vehicle body. In particular, the vertical reinforcing member 7 and the vertical wall part vw of the rear wheel house inner 16 are formed. Even if the road surface reaction force from the shock absorber 12 is input from the side of the closed cross-section portion through the upper end connecting portion 13, the input load can be reliably distributed to the rigidity reinforcing frame K side, and the rear floor 2 and the vehicle compartment are opposed to each other. The durability of the rear vehicle body including the wall plate material 6 can be sufficiently enhanced.
Next, as shown in FIG. 1, a rear motor M and a rear transmission CG are provided in a space immediately below the rear floor 2 at a portion reinforced by the rigid reinforcement frame K.

As shown in FIGS. 1 and 2, the left and right rear side members 4 are formed in a U-shape that integrally couples between the left and right sub side members 501 and a sub side member 501 that curves and protrudes so as to bulge toward the vehicle interior. The auxiliary rigid frame 5 including the sub-cross member 502 is integrally and stably fastened. Such an auxiliary rigid frame 5 also strengthens the rigidity of the rear part of the vehicle body. Reference numeral 22 in FIG. 1 denotes a cover that is attached to the auxiliary rigid frame 5 and protects the rear motor M and the rear transmission CG.
The front and rear ends of the left and right sub-side members 501 are fastened to the connecting portion 401 of the rear side member 4 with bolts via an insulator (not shown). As a result, vibration and noise from the rear motor M and the rear transmission CG are suppressed from being transmitted to the left and right rear side members 4.

As shown in FIGS. 1 and 3, the upper and lower arms 26 and 27 of the rear suspension 17 are pivotally supported by the auxiliary rigid frame 5 at their fulcrum ends j1 and j2 and the swing end is connected to the knuckle 21 by a ball joint bj. The front end of the knuckle 21 is pivotally coupled to a bracket 24 on the front side of the rear side member 4 via a trailing arm 23 so as to be swingable. A rear wheel W is pivotally supported on the knuckle 21. The drive shaft WS of the left and right rear wheels W and the output shaft WS1 on the rear side of the rear transmission CG are connected via a constant velocity joint 25 and an intermediate shaft WS2, so that the rear wheel CG can move up and down. It is possible to drive by receiving the rotational force.
The vicinity of the swinging end of the lower arm 27 is pin-coupled to the lower end 122 of the shock absorber 12, and is connected to the upper end connecting portion 13 on the rear wheel house inner 16 side that forms the vehicle interior facing wall plate 6 via the shock absorber 12. Connected. Thus, the road surface reaction force received by the rear wheel W is input from the shock absorber 12 to the upper end connecting portion 13.

When the rear vehicle body having such a rear vehicle body structure loads a load into the rear vehicle compartment (loading chamber) R, the felt which is the elastic bulging member 14 on the floor and the unit housing 8 mounted thereon are as follows. Since the space above the floor is not excessively narrowed, a sufficient luggage storage space can be secured.
Furthermore, even when the vehicle C travels in the hybrid mode and the rear motor M and the rear transmission CG of the rear component 182 are driven, the lower surface of the unit housing 8 closely contacts the rear floor 2 via the elastic bulging member 14. Since the elastic bulging member 14 suppresses the displacement of the rear floor 2, the elastic bulging member 14 exhibits functions of damping the rear floor 2 that is likely to vibrate due to vibrations from the motor M below and the function of reducing radiated sound. This can improve the comfort of the passenger compartment.

  Further, while the vehicle C is traveling, the four members of the vertical closed cross-section structure portion composed of the left and right vertical reinforcing members 7 and the laterally arranged unit housing 8 and the cross member 3 cooperate with each other. Since the horizontally-long rectangular rigidity-enhancing frame K is formed, the rigidity of the rear part of the vehicle body can be sufficiently enhanced. In particular, even if the road surface reaction force from the shock absorber 12 is input via the upper end connecting part 13, The input load can be reliably distributed to the rigidity-enhanced frame K side, the durability of the rear vehicle body including the rear floor 2 and the compartment facing wall plate 6 can be sufficiently enhanced, and the durability of the vehicle can be improved.

As described above, the configuration in which the vertical wall portion vw of the vehicle facing wall plate material is formed in the vehicle facing portion of the rear wheel house inner 16 and the vertical reinforcing member 7 is welded to the vertical wall portion vw has been described. A configuration may be adopted in which a vertical wall portion is formed in a portion on the rear inner quarter panel side (not shown) and a vertical reinforcing member 7 (not shown) is welded thereto, and in this case, the rigidity of the rear portion of the vehicle body is sufficiently strengthened. be able to.
In the above description, the vehicle is described as a hybrid vehicle. However, the vehicle may be a vehicle that travels by driving wheels by the output of an electric vehicle (EV) or other electric motor, and the vehicle body reinforcement structure of FIG. 1 is applied in any case. The same effect as that of the other vehicle can be obtained.

2 rear floor 3 cross member 4 rear side member 6 compartment facing wall plate material 7 vertical reinforcing member 8 unit housing 9 fastening portion 11 fastening means 12 shock absorber 13 upper end connecting portion 14 elastic bulging member 15 rear quarter panel 16 rear wheel house inner t gap vw Vertical wall B Car body C Vehicle M Motor R Rear compartment U Drive unit W Wheel WS Drive shaft Y Vehicle width direction

Claims (5)

Left and right side members that are coupled to the lower surface of the floor of a vehicle that travels with wheels driven by a motor and that are joined to the left and right ends of a cross member that is long in the vehicle width direction, and a drive unit for the motor A unit housing which is accommodated and positioned above the floor and above the left and right side members, and a left and right fastening portion provided at the left and right ends of the unit housing; A vertical wall portion of a vehicle compartment facing wall plate member joined to the end to form a side wall of the vehicle compartment, and left and right fastening means for fastening the fastening portion and the vertical wall portion to each other,
A vehicle body reinforcement structure characterized by that. The side member is a rear side member;
An upper end connecting portion that supports an upper end of a shock absorber that is a suspension device of the wheel is formed on at least one of the rear side member or the vehicle interior facing wall plate material,
The vehicle body reinforcing structure according to claim 1. A vertical reinforcing member having a vertical closed cross section is integrally coupled to a vertical wall portion of the casing facing wall plate material, and the left and right fastening means fasten the left and right fastening portions and the vertical reinforcing member of the unit housing to each other.
The vehicle body reinforcing structure according to claim 1 or 2, wherein The vehicle room facing wall plate material is a rear quarter panel, and a vertical wall portion is formed on a rear wheel house inner formed in a bulging shape from the main part of the vehicle.
The vehicle body reinforcing structure according to claim 1, 2, or 3. An elastic bulge member is interposed in a compressed state in a gap between the floor and the unit housing disposed above the floor,
The vehicle body reinforcing structure according to any one of claims 1 to 4, wherein the vehicle body reinforcing structure is provided.

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