JP5320371B2 - Rear body structure of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To set high bending rigidity of a vehicle-body front-back direction of an additional member like a load dispersing member which transmits rear collision load to the front of the vehicle body without increasing the size and thickness of the additional member and to effectively reduce the deformation amount of a vehicle body rear part caused by rear collision and reduce a collision stroke. <P>SOLUTION: This structure has: right and left rear side frames 14 extending in the vehicle-body front-back direction in the right/left both sides of a rear floor panel 10; a spare tire pan cross member 24 which extends in the vehicle-body width direction along the vehicle-body-width-direction cross sectional shape of a spare tire pan part 12 in a vehicle body front part side of the spare pan part 12 formed in the rear floor panel 10, is coupled to the spare tire pan part 12 to form a box-shaped cross sectional shape, and has right/left ends coupled to the right/left rear side frames 14; and a rear center frame 26 which is disposed along a bottom part of the spare tire pan part 12, is linearly extending in the vehicle-body front-back direction at a center part of the vehicle-body width direction, and has a front end abutting and coupled to a rear wall of the spare tire pan cross member 24. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a rear body structure of an automobile, and more particularly to a rear body structure having a spare tire pan.

As a rear vehicle body structure having a spare tire pan (spare tire housing) for housing the Supeatai Ya, load distribution for members extending along the longitudinal direction of the vehicle body so as creeping under the bottom surface of the spare tire pan assembly to the spare tire pan is coupled to the cross member front end portion of the member for load distribution is installed between the pair of right and left rear side members (Li ya side frame), the rear end of the rear end portion of the member for the load distribution is a pair of rear side members There is one that is coupled to a back panel that is disposed in (for example, Patent Document 1).

  In this rear vehicle body structure, the load distribution member extends between the left and right rear side members in the longitudinal direction of the vehicle body, and the front end is coupled to the cross member. It works to transmit (impact load) to the cross member.

JP 2006-88740 A

  However, in the rear vehicle body structure as shown in Patent Document 1, the load distribution member is arranged so as to crawl the lower bottom surface of the spare tire pan, so that the bent portion is formed along the side cross-sectional shape of the spare tire pan. Since it includes a shape, a bending moment is generated in the transmission of the rear impact load to the cross member, and it is difficult to set the bending rigidity in the longitudinal direction of the vehicle body high without increasing the size and thickness.

  The problem to be solved by the present invention is to increase the bending rigidity in the vehicle longitudinal direction of an additional member such as a load distribution member that transmits a rear impact load to the front of the vehicle body without increasing the size and thickness of the additional member. In other words, the amount of deformation of the rear part of the vehicle body due to a rear collision (especially an offset rear collision) and the shortening of the collision stroke can be effectively performed.

The rear body structure of a vehicle according to the present invention is a rear body structure of a vehicle having a spare tire pan portion 12 having a recessed shape for accommodating a spare tire (ST) at a rear portion of the rear floor panel (10), left and right Li ya side frames extending on the left and right sides of the rear floor panel (10) in the longitudinal direction of the vehicle body (14), wherein the spare tire pan portion of the vehicle body front side of the spare tire pan portion (12) (12) extending in the width direction of the vehicle body following the vehicle width direction of the cross-sectional shape, a box-shaped cross section is coupled to the spare tire pan portion (12), left and right end portions of the left and right Li ya side frame (14 ) And a spare tire pan cross member (24) coupled to the spare tire pan portion (12), and a central portion in the vehicle body width direction extends in a straight line in the vehicle longitudinal direction. Front and having said spare tire pan abuts the rear wall of the cross member (24) coupled Li Ya center frame (26).

According to the rear vehicle body structure, extends in a straight line to the central portion of the vehicle body width direction is placed along the bottom of Li Ya center frame (26) is a spare tire pan (12) in the longitudinal direction of the vehicle body, the front end Is abutted and joined to the rear wall of the spare tire pan-cross member (24), so that no bending moment is generated in the transmission of the rear-impact load to the spare tire pan-cross member (24). the longitudinal direction of the vehicle body of the flexural rigidity of an additional member Li ya center frame (26) can be set high without increasing the size or planks of the Li ya center frame (26).

Rear vehicle body structure for an automobile according to the present invention, preferably, the Li Ya center frame (26), have a concave cross-sectional shape having a flange piece in the vehicle width direction on both sides, the said flange piece It is combined with the bottom of the spare tire pan (12) to form a box-shaped cross section.

According to the rear vehicle body structure, by forming the shape sectional shape box de spare tire pan portion (12) and re Ya center frame (26), the vehicle body front-rear direction of the flexural rigidity of Li Ya center frame (26) It can be set even higher without increasing the size or planks of Li ya center frame (26).

Rear vehicle body structure for an automobile according to the present invention, preferably, further wherein the inner concave portion of the Li Ya center frame (26), have a front wall opposite to the spare tire pan rear wall of the cross member (24) A stiffener (36, 38) having a concave cross-sectional shape is coupled.

According to the rear body structure, the vehicle body longitudinal direction bending rigidity of Li Ya center frame (26) is further increased by the installation of the stiffeners (36, 38), stiffeners (36, 38) is the spare tire pan cross member (24 by) has a front wall facing the rear wall of the transmission of the impact load to the spare tire pan cross member from Li ya center frame (26) (24) is also through the stiffener (36, 38) Done.

Rear vehicle body structure for an automobile according to the present invention, preferably, the spare tire pan cross member (24) is coupled to the bottom of the concave portion of the rear wall and the Li Ya center frame (26) of the spare tire pan Cross The member (24) has a box-shaped cross-sectional shape, and further includes a collision load transmission member (34) having a rear wall directly opposed to the front wall of the stiffener (36, 38).

According to the rear vehicle body structure, the bond strength of Li Ya center frame (26) against the rear wall of the spare tire pan cross member (24) is reinforced by the collision load transmission member (34), from Li Ya center frame (26) Transmission of the collision load to the spare tire pan cross member (24) can be performed even better.

Rear vehicle body structure for an automobile according to the present invention, preferably, the Li Ya center frame (26) is divided into front Li Ya center frame (30) rear Li Ya center frame (32), said front Li ya center frame (30) is the abutment coupled to the rear wall of the spare tire pan cross member (24), is and the bond collision load transmission member (34) to the front Li ya center frame (30), rear the stiffener (36, 38) is coupled to the re ya center frame (32).

According to the rear vehicle body structure, after combining the front Li Ya center frame (30) and the collision load transmission member (34) to the rear wall of the spare tire pan cross member (24), a rear re Ya center frame (32 ) Can be combined.

In the rear body structure of the automobile according to the present invention, preferably, the stiffener is divided into a front stiffener (36) and a rear stiffener (38), and the front stiffener (36) and the rear stiffener (38) the formed fold of Li ya center frame (26) to (a) between. Furthermore, the central portion of the scan Bae Ataiya (ST) tires fastening portion for fastening to the bottom of the spare tire pan part (B) (12) (44 ) is provided said folding portion from (A) to the front of the vehicle body position ing.

According to the rear vehicle body structure, the front stiffener (36) and the bending portion of the Li Ya center frame (26) between becomes vulnerable than other parts of the rear stiffener (38) (A) are clearly formed by re ya center frame (26) is bent in the bending portion rear collision severe (a), so that the absorption of impact energy after without causing deformation of the vehicle compartment space is ensured at the design point .

  The rear vehicle body structure of the automobile according to the present invention preferably includes a rear cross member (46) extending in a vehicle body width direction from the spare tire pan portion (12) of the rear floor panel (10), and the rear A front wall reinforcing member (56) extending in the vehicle longitudinal direction along the front wall of the spare tire pan portion (12) is further provided between the cross member (46) and the spare tire pan cross member (24). .

According to the rear vehicle body structure, the reinforcement of the front wall of the spare tire pan portion (12) is made efficiently by the front wall reinforcing member (56)

Rear vehicle body structure for an automobile according to the present invention, preferably, the mounting portion of the Li Ya suspension arm (24C) is provided wherein the spare tire pan cross member (24).

According to the rear vehicle body structure, it is effectively utilized spare tire pan cross member (24) Ghali mounting portion of Ya suspension arm as (24C), supporting strength of Li Ya suspension arm is increased.

According to the vehicle body rear structure of the vehicle according to the present invention, extends in a straight line Li Ya center frame is disposed along the bottom of the spare tire pan portion a central portion of the vehicle body width direction in the vehicle longitudinal direction, the front end spare since they are joined pressed against the rear wall of the tire pan cross member, in the transmission to the rear collision load of the spare tire pan cross member, without causing a bending moment, Li ya center is an additional member for the load distribution the longitudinal direction of the vehicle body flexural rigidity of the frame can be set high without increasing the size or planks of the Li ya center frame, reduction in the rear portion of the vehicle body deformation amount due to rear-end collision, effectively perform that shortening of the collision stroke Can do. By re Ya center frame is provided, is transmitted to the front of the vehicle body rear impact load is dispersed by the three frames of the right and left Li Ya side frame and Li Ya center frame, even when an offset collision, either the left and right rear impact load by two frames of Li ya side frame and Li ya center frame of the dispersed and transmitted to the front of the vehicle body, the vehicle body rear portion of the deformation can be effectively suppressed.

Lower bottom view showing an embodiment of the rear vehicle body structure according to the present invention (plan view of the re Ya Furoapa, channel from the vehicle exterior side). The bottom bottom view of the principal part of the vehicle body rear part structure of the automobile according to the present embodiment. Perspective view of the rear vehicle body structure according to the present embodiment, as viewed by fluoroscopy re Ya Furoapa, channel from the vehicle interior side. The side view of the principal part of the vehicle body rear part structure of the motor vehicle by a present Example. The bottom bottom view of the principal part of the vehicle body rear part structure of the automobile according to the present embodiment. The main part of the rear vehicle body structure according to the present embodiment, detailed perspective view seen from the vehicle interior side (perspective view of removal of the Li Ya Furoapa, channel). The main part of the rear vehicle body structure according to the present embodiment, a detailed perspective view from the vehicle exterior side (perspective view of removal of the Li Ya Furoapa, channel). Cross-sectional plan view showing details of the junction of the Li Ya center frame and Li Ya center frame and spare tire pan cross member of the vehicle body rear structure of the vehicle according to the present embodiment.

  Hereinafter, one embodiment of a vehicle body rear structure according to the present invention will be described with reference to FIGS. The members constituting the rear structure of the vehicle body are obtained by pressing a steel plate unless otherwise specified. In the following description, front and rear refer to the front and rear of the vehicle body, and left and right refer to the left and right in the width direction of the vehicle body.

  As shown in FIGS. 1 to 5, the rear structure of the vehicle body includes a rear floor panel 10 as a floor member that constitutes a floor behind the vehicle body from the rear seat. A rear part of the rear floor panel 10 is formed with a spare tire pan 12 having a recessed shape for accommodating the spare tire ST (see FIG. 4). The spare tire pan portion 12 has a bottom portion 10B below the general surface 10A of the rear floor panel 10, a front wall 10C that rises from the bottom portion 10B and is connected to the general surface 10A, and left and right side walls 10D, and is open rearward. It has a shallow bathtub shape.

Left and right Li Ya side frames 14 extending in parallel to each other in the vehicle longitudinal direction is provided on the left and right sides of the rear floor panel 10. Li Ya side frames 14 of the left and right concave cross-sectional shape of the upper opening having a flange piece 14A respectively on the left and right sides, have a so-called hat-shaped cross-section, left and right sides of the rear floor panel 10 and the flange piece 14A A box-shaped cross-sectional shape (closed cross-sectional shape) is configured in cooperation with the rear floor panel 10 by being joined to the lower bottom surface (surface outside the passenger compartment) of the general surface 10A by spot welding.

Vehicle front ends of the left and right Li Ya side frame 14 are joined by spot welding to the rear ends of the left and right side sills 16 extending in parallel to each other in the vehicle longitudinal direction (see FIG. 1). Bumper extension member 18 of the right and left box-shaped cross-sectional shape to the end portion of the vehicle body rear side of the right and left Li Ya side frame 14 is coupled (see FIG. 1). The left and right bumper extension member 18, so as to bridge the two, Li Ya bumper frame 20 are joined by spot welding (see FIG. 1).

The first rear floor cross member 22 which is joined by spot welding the ends of the left and right extending in the width direction of the vehicle body to the front end portion of the right and left Li Ya side frame 14 is provided at the vehicle body front edge of the rear floor panel 10 It has been. The first rear floor cross member 22 has a concave transverse cross-sectional shape (hat-shaped cross-sectional shape) having a lower opening having flange pieces 22A on both front and rear sides, and the flange piece 22A is connected to the front edge of the rear floor panel 10. By connecting to the upper surface (surface on the vehicle interior side) by spot welding, a box-shaped cross-sectional shape (closed cross-sectional shape) is configured in cooperation with the rear floor panel 10.

The vehicle body front side of the spare tire pan 12 extends in the vehicle width direction following the vehicle width direction of the cross-sectional shape of the spare tire pan 12, the spot left and right ends to the left and right Li Ya side frame 14 A spare tire pan cross member 24 joined by welding is provided. The spare tire pan cross member 24 has a concave cross-sectional shape (hat-shaped cross-sectional shape) with an upper opening having flange pieces 24A on both front and rear sides, and the bottom 10B of the spare tire pan 12 and the left and right side walls 10D. The flange piece 24A is coupled over the entire area of the bottom 10B of the spare tire pan 12 and the left and right side walls 10D so as to cooperate with the rear floor panel 10 so A cross-sectional shape (closed cross-sectional shape) is formed.

The left and right sides of the spare tire pan cross member 24, the mounting portion 24C of Li Ya suspension arm not shown (see FIGS. 5 and 6) is provided.

The center portion of the bottom portion 10B of the spare tire pan portion 12 in the vehicle width direction extends straight along the vehicle body longitudinal direction without including a large bent portion along the bottom portion 10B, and the front end of the spare tire pan cross member 24 Li ya center frame 26 coupled abutted to the rear wall 24B is provided.

The details of the re Ya center frame 26, will be described with reference to FIGS. Li Ya center frame 26 is configured by being divided into a relatively short front Li Ya the center frame 30 and a relatively long rear Li Ya center frame 32. The front Li Ya the center frame 30 and a relatively long rear Li Ya center frame 32, respectively, the flange piece 30A on the left and right sides, the upper opening having a 32A concave cross-sectional shape (hat-shaped cross-sectional shape) was though, the bottom part 10B of the front Li ya center frame 30 of the front and the spare tire pan 12 and the rear end of the rear Li ya center frame 32 forms a straight line are connected to one another in the form of partially polymerized A box-shaped cross-sectional shape (closed) is provided in cooperation with the rear floor panel 10 by spot welding the flange pieces 30A, 32A to the bottom 10B of the spare tire pan 12 by providing the outer side of the passenger compartment. Sectional shape).

The left and right sides of the front end of the front Li Ya center frame 30 the flange piece portion 30B are formed bent. The flange piece 30B is joined to the rear wall 24B of the spare tire pan cross member 24 by spot welding. Thus, the front Li Ya center frame 30 is pressed against the wall 24B after the spare tire pan cross member 24 coupling.

  On the rear wall 24B side of the spare tire pan cross member 24, a collision load transmission member 34 is provided. The collision load transmission member 34 has a concave transverse cross-sectional shape (hat-shaped cross-sectional shape) with a front opening having flange pieces 34 </ b> A on both the left and right sides, and is rearward of the vehicle body from the rear wall 24 </ b> B of the spare tire pan cross member 24. It has a rear wall 34B located. The rear wall 34B of the collision load transmission member 34 is a wall portion parallel to the rear wall 24B of the spare tire pan cross member 24.

A flange piece 34C is bent at the left and right sides of the collision load transmitting member 34 and the lower edge of the rear wall 24B. Collision load transmission member 34 is coupled to the flange piece portion 34A to the wall 24B after the spare tire pan cross member 24 by spot welding, spot the flange piece 34C in the bottom portion 30C of the concave portion of the front Li Ya center frame 30 They are joined by welding and cooperate with the spare tire pan cross member 24 to form a box-shaped cross section.

Inside the concave portion of the rear Li Ya center frame 32, and a front stiffener 36 and a concave cross-sectional shape of the upper opening and the rear stiffener 38 is joined by spot welding. The front stiffener 36 and rear stiffener 38, the rear Li Ya center frame 32 are arranged with a gap 40 in the longitudinal direction of the vehicle body.

Part rear Li Ya A center frame 32 corresponds to the gap 40 is more vulnerable portions the front stiffener 36 and rear stiffener 38 is provided, folded portion of the portion corresponding to the gap 40 is re Ya center frame 26 A (see FIGS. 4 and 8). In the present embodiment, the bent portion A is located at a loosely bent portion 10E of the bottom portion 10B of the spare tire pan portion 12 that is V-shaped and opened with a large obtuse angle. Thus, at the rear Li Ya center frame 32 is bent line portion A, easily further bent.

Front of the front stiffener 36, the front end of the rear Li Ya center frame 32 protrudes toward the front of the vehicle body, and enters the inside of the concave portion of the front Li Ya center frame 30. The front stiffener 36 has a front wall 36A that stands up from the bottom at the front end. The front wall 36A faces the rear wall 24B of the spare tire pan cross member 24 and the rear wall 34B of the collision load transmission member 34 in parallel. In this embodiment, the front wall 36A of the front stiffener 36 and the rear wall 34B of the collision load transmission member 34 are opposed to each other with a small gap 35 in the longitudinal direction of the vehicle body.

  The front wall 36A of the front stiffener 36 is joined to the bent front end portions of the left and right side walls 36B of the front stiffener 36 by spot welding, and forms a box shape in cooperation with the left and right side walls 36B, thereby achieving high rigidity. It has been.

The rear end of the rear Li Ya A center frame 32 standing piece portion 32B are formed bent. In the rear of the rear Li Ya center frame 32 is coupled at one end to the upright piece portion 32B, tow hook member 42 coupled to the rear end near the bottom 32C of the rear Li Ya center frame 32 is attached to the other end.

The vehicle interior side of the bottom portion 10B of the spare tire pan 12, as shown in FIG. 3, the vehicle body forward position than the set folding portion A by a gap 40, the central portion B (Fig. Of the scan Bae Ataiya ST 4 tires fastening member 44 of the projection-shaped for fastening to the bottom part 10B of the references) the spare tire pan 12 is joined by spot welding.

As shown in FIGS. 1 to 3, the vehicle body forward portion than the spare tire pan 12 of the rear floor panel 10, an end portion of the left and right extending in the width direction of the vehicle body to the left and right Li Ya side frame 14 A second rear floor cross member 46 joined by spot welding is provided.

  In this embodiment, a fuel tank, a fuel pump (not shown), and the like are arranged outside the vehicle compartment on the front side of the vehicle body from the spare tire pan portion 12 of the rear floor panel 10, so that the spare tire pan portion 12 of the rear floor panel 10. Further, a maintenance hole 10F for the fuel pump is formed in the front part of the vehicle body. The second rear floor cross member 46 is disposed so as to cross the maintenance hole 10F in the vehicle body width direction, so that a concave cross-sectional shape of a downward opening having a flange piece portion 48A, 50A on both front and rear sides (hat) The flange pieces 48A and 50A are joined to the upper surface of the rear floor panel 10 (the surface on the vehicle interior side) by spot welding and cooperate with the rear floor panel 10 to form a box-shaped cross section (closed cross section). Shape) and left and right side members 48 and 50, and left and right end portions are detachably connected to side members 48 and 50 by bolts 52, and are divided into a central member 54 located at the maintenance hole 10F. Has been.

  On the vehicle exterior side of the front wall 10C of the spare tire pan portion 12, a space between the second rear floor cross member 46 and the spare tire pan cross member 24 extends along the front wall 10C of the spare tire pan portion 12 in the longitudinal direction of the vehicle body. An extending front wall reinforcing member 56 is provided. The front wall reinforcing member 56 is joined to the front wall 10C of the spare tire pan portion 12 by spot welding, and the upper front end is tripled by the flange pieces 48A, 50A of the side members 48, 50 and the rear floor panel 10. The lower rear end is spot-welded in a triple manner by the flange piece 24A of the spare tire pan cross member 24 and the rear floor panel 10.

According to the vehicle body rear portion structure according to the embodiments described above, the central portion of the vehicle body width direction in the vehicle longitudinal direction Li Ya center frame 26 is disposed along the bottom 10B of the spare tire pan 12, include a large bent portion without extending linearly, since they are joined butted against the front end to the wall 24B after the spare tire pan cross member 24, in the longitudinal direction of the vehicle body Li ya center frame 26 is an additional member for the load distribution flexural rigidity and without increasing the size or planks of Li ya center frame 26, high can be set, reducing the amount of deformation of the rear body by a rear collision, shortening of the collision stroke can be effectively performed.

By re Ya center frame 26 is provided, is transmitted to the front of the vehicle body rear impact load is dispersed by the three frames of the right and left Li Ya side frame 14 and Li Ya center frame 26, even when an offset collision, rear impact load is dispersed and transmitted to the front of the vehicle body, rear body deformation is effectively prevented by the two frames of left or right Li ya side frame 14 and Li ya center frame 26.

  Furthermore, the bottom 10B of the spare tire pan 12 and the rear center frame 26 form a box-shaped cross-sectional shape, so that the bending rigidity of the rear center frame 26 in the longitudinal direction of the vehicle body can be increased. It can be set higher without causing thickening.

Furthermore, the front stiffener 36, by the rear stiffener 38 is installed, the vehicle body longitudinal direction of the flexural rigidity of Li Ya center frame 26 is further increased. Further, by the front stiffener 36 has a front wall facing the wall 24B after the spare tire pan cross member 24, the transmission of the impact load to the spare tire pan cross member 24 from Li Ya center frame 26 before This is also performed via the part stiffener 36.

Further, by the collision load transmission member 34 is provided, the bonding strength of the front Li Ya center frame 30 against the wall 24B after the spare tire pan cross member 24 is reinforced, the spare tire pan from Li Ya center frame 26 The transmission of the collision load to the cross member 24 can be performed even better. The collision load transmission member 34 may be configured in a box shape with its upper end closed in order to improve rigidity.

In this embodiment, the front Li Ya center frame 30 is abutment coupled to wall 24B after the spare tire pan cross member 24, is and bound collision load transmission member 34 to the front Li Ya center frame 30, a rear Li Ya since the front stiffener 36 and rear stiffener 38 to the center frame 32 is attached, the load transmission efficiency of Li ya center frame 26 is improved. Further, after coupling the front Li Ya the center frame 30 and the collision load transmission member 34 to the wall 24B after the spare tire pan cross member 24, it is possible to perform a binding work of the rear rear center frame 32.

By the gap 40 between the front stiffener 36 and rear stiffener 38 is provided, the portion of the gap 40 is bent line portion A of Li Ya center frame 26 become vulnerable than other parts are clearly formed, Li ya center frame 26 by the folded portion A is the collision bends surely after intense. As a result, the rear-end collision energy is reliably absorbed at the design location without causing deformation of the vehicle interior space.

Further, by the front wall reinforcement member 56 is provided, the reinforcement of the front wall 10A of the spare tire pan 12 is made, against the front wall 10A of the spare tire pan 12 is scan Peataiya ST the behavior lifted upward Become more certain.

By the spare tire pan cross member 24 is attached portion 24C of Li Ya suspension arm is provided, it is effectively utilized as a mounting portion 24C of the spare tire pan cross member 24 Ghali Ya suspension arm, the Li Ya suspension arm Support strength increases.

Also, Li Ya center frame 26, by pulling the hook member 42 to the rear end of the rear Li Ya center frame 32 is attached also functions as a reinforcing member of the mounting portion of the traction hook member 42.

10 rear floor panel 12 spare tire pan 14 Li Ya side frame 16 side sill 18 bumper extension member 20 Li Ya bumper frame 22 first rear floor cross member 24 spare tire pan cross member 24B rear wall 24C Li Ya suspension arm mounting portion 26 Li ya center frame 30 front Li ya center frame 32 rear Li ya center frame 34 collision load transmission member 34B rear wall 36 front stiffener 36A front wall 38 rear stiffener 42 tow hook member 44 tires fastening member 46 second rear floor cross member 56 Front wall reinforcement member A Folding part

Claims (7)

A rear body structure of a vehicle having a spare tire pan portion in a recessed shape for accommodating a spare tire at a rear portion of a rear floor panel,
And right and left Li Ya side frames extending on the left and right sides of the rear floor panel in the vehicle longitudinal direction,
The vehicle front side of the spare tire pan portion extends in the vehicle width direction following the cross-sectional shape in the vehicle width direction of the spare tire pan portion, and is connected to the spare tire pan portion to form a box-shaped cross-sectional shape, a spare tire pan cross member and left and right ends coupled to the left and right Li ya side frame,
The spare tire pan portion is disposed along the bottom of the extending linearly central portion of the vehicle body width direction in the vehicle longitudinal direction, combined Li Ya butted against the front end to the rear wall of the spare tire pan cross member A center frame,
The rear center frame has a concave cross-sectional shape having flange pieces on both sides in the vehicle width direction, and the flange piece is coupled to the bottom of the spare tire pan to form a box-shaped cross-section. And a rear portion of the vehicle body in which a stiffener having a front wall facing the rear wall of the spare tire pan cross member and having a concave cross-sectional shape is coupled to the inside of the concave portion of the rear center frame. Construction. The spare tire pan a box-shaped cross section in the rear wall of the cross member and the Li Ya is coupled to the bottom of the concave portion of the center frame the spare tire pan cross member, directly opposite the front wall of the stiffener The vehicle body rear part structure according to claim 1 , further comprising a collision load transmission member having a rear wall. The Li Ya center frame is divided into a front Li Ya the center frame and a rear re Ya center frame, the front Li Ya center frame is abutment coupled to the rear wall of the spare tire pan cross member, and the front Buri ya center frame the collision load transmission member is coupled to the vehicle body rear structure of a vehicle according to claim 2, wherein the stiffener to the rear Li ya center frame is coupled. The stiffener is divided into a front stiffener and rear stiffener, according to the any one of claims 1 to 3 to form a folding portion of Li Ya center frame between the rear stiffener and the front stiffener Car body rear structure. Rear vehicle body structure according to claim 4, tire fastening portion for fastening the central portion of the scan Bae Ataiya front of the vehicle body position from the folding portion to the bottom portion of the spare tire pan portion. A rear cross member extending in the vehicle body width direction from the spare tire pan portion of the rear floor panel in the vehicle body width direction;
A front wall reinforcing member extending in the vehicle longitudinal direction along the front wall of the spare tire pan portion between the rear cross member and the spare tire pan cross member;
The vehicle body rear part structure according to any one of claims 1 to 5 , further comprising: Rear vehicle body structure according to any one of the spare tire pan to the cross member claims 1 mounting portion of the Li Ya suspension arm is provided 6.

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