JP2013252772A - Vehicle body rear structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body rear structure supporting a battery with a front cross-member and a rear cross-member and capable of cooling the battery by using air in a vehicle compartment.SOLUTION: A vehicle body rear structure 10 includes a rear floor panel 19 formed from a rear cross-member 17 toward rearward of a vehicle body and hence an opening 21 is opened between a kick-up section 14 and the rear floor panel 19. A case body 24 is inserted into the opening 21 from the vehicle compartment side. A battery 58 is stored in the case body 24. Moreover, the case body 24 includes a mounting flange 61 that can be attached to a front cross-member 15 and the rear cross-member 17. A covering member 25 is attached onto the mounting flange 61 and, under this state, the covering member 25 is disposed on the vehicle compartment 45 side.

Description

  The present invention relates to a vehicle body rear structure in which a kick-up portion is raised from a rear end portion of a front floor panel, and a rear floor panel is provided on the rear side of the vehicle body of the kick-up portion.

In the rear structure of the vehicle body, a front cross member and a rear cross member are provided on the back surface of the vehicle body floor at a predetermined interval in the vehicle front-rear direction, and a battery is provided between the front and rear cross members and below the vehicle body floor. Are known.
By providing a battery between the front and rear cross members, the battery can be supported by the front and rear cross members (see, for example, Patent Document 1).

JP 2011-111124 A

However, the vehicle body rear structure of Patent Document 1 is provided with a battery below the vehicle body floor. Therefore, by arranging the battery outside the vehicle compartment, the battery is partitioned from the vehicle compartment by the vehicle body floor.
For this reason, in order to guide the air in the vehicle interior to the battery and cool the battery using the guided air, the vehicle body floor becomes an obstacle, and there is room for improvement from this viewpoint.

  It is an object of the present invention to provide a vehicle body rear structure that supports a battery by a front cross member and a rear cross member and that can cool the battery by using air in the vehicle interior.

  The invention according to claim 1 is a vehicle body rear structure in which a kick-up portion is raised between left and right skeleton members from a rear end portion of a front floor panel, and a rear floor panel is provided at the rear of the vehicle body of the kick-up portion. A front cross member provided at a kick-up portion, a rear cross member provided at the rear of the front cross member and spanned by the left and right skeleton members, and the rear cross member from the rear cross member toward the rear of the vehicle body. By providing a rear floor panel, an opening that is opened between the kick-up portion and the rear floor panel, a box that can be inserted into the opening from the passenger compartment side and that can store a battery therein, is formed. And a box having a mounting flange that can be attached to the front cross member and the rear cross member, and attachable to the mounting flange, One and the lid member can be disposed on the vehicle compartment side, characterized by comprising a.

  According to a second aspect of the present invention, in the box body, a box-shaped box body capable of storing the battery and the mounting flange are integrally formed of fiber reinforced resin, and the mounting flange and the opening are formed in the mounting flange. It has the seal | sticker support surface which supports the seal member which obstruct | occludes between the periphery of these.

  According to a third aspect of the present invention, the mounting flange has a member storage portion that can store the front cross member from the front side of the vehicle body by forming the front side of the vehicle body in a substantially U-shaped cross section. .

  According to a fourth aspect of the present invention, the front cross member is stretched over the left and right skeleton members.

  According to a fifth aspect of the present invention, the front cross member is provided with a collar capable of fitting the left and right skeleton members and a fastening member fastened to the kick-up portion inside the front cross member.

  According to a sixth aspect of the present invention, the lid member is formed of a steel plate.

Here, it is conceivable that a seat cushion of the seat is provided above the lid member. A load acts on the lid member from the seat cushion by providing the seat cushion of the seat above the lid member.
Therefore, in claim 6, the lid member is formed of a steel plate.

  According to a seventh aspect of the present invention, the box body has both ends in the vehicle width direction, the duct communication portion is opened to the mounting flange, the base end portion of the cooling duct communicates with the duct communication portion, and the tip of the cooling duct The part is opened in the passenger compartment.

  According to an eighth aspect of the present invention, in the box body, one end portion in the vehicle width direction protrudes outward in the vehicle width direction, and a cable opening portion through which the wire harness can be inserted is opened at the protruded one end portion, and the box opening portion passes through the cable opening portion. The wire harness is wired so as to be connectable to the battery from the outside of the box.

  According to a ninth aspect of the present invention, the mounting flange includes a mounting hole through which a mounting member for mounting the front cross member to the mounting flange can pass, and the mounting flange, the front cross member, and the lid member at the kick-up portion. The fastening member for fastening includes a fastening hole through which the fastening member can penetrate.

  The collar may have a lower end projecting through the front cross member to the kick-up portion.

  The eleventh aspect of the present invention is characterized in that the rear cross member includes a flange mounting portion for mounting the mounting flange and an anchor mounting portion for mounting a seat belt anchor.

  The twelfth aspect includes a battery support member that supports the battery, and the battery support member is attached to the front cross member by the attachment member that can penetrate the attachment hole.

  According to a thirteenth aspect of the present invention, the battery support member is stretched over the front cross member and the rear cross member.

  According to a fourteenth aspect of the present invention, a plurality of ribs are erected at the bottom of the box body, and the battery can be supported by the plurality of ribs by placing the battery on the plurality of ribs. It is characterized by that.

In the invention according to claim 1, the opening is opened between the kick-up portion and the rear floor panel. Further, the mounting flange of the box can be attached to the front cross member and the rear cross member with the box inserted into the opening.
Thus, by attaching the mounting flange of the box to the front cross member and the rear cross member, the battery stored in the box can be firmly supported by the front and rear cross members.

Further, the lid member can be arranged on the vehicle compartment side by attaching the lid member to the attachment flange. Therefore, since it is not necessary to form a communication port in the rear floor panel, the interior of the box can be communicated with the passenger compartment with a simple configuration.
As a result, the battery can be satisfactorily cooled using the air in the vehicle interior with a simple configuration.

In the invention which concerns on Claim 2, a box can be easily shape | molded by deep drawing shape by injection molding, blow molding, etc. by forming a box with fiber reinforced resin (fiber reinforced plastic).
Therefore, since the width dimension of the box (the dimension in the vehicle longitudinal direction) can be kept small, a relatively large space can be secured on the vehicle body rear side of the box. Thereby, for example, the capacity of the fuel tank provided on the vehicle body rear side of the box can be secured relatively large.

  Further, the mounting flange has a seal support surface, and the seal member is supported by the seal support surface, whereby the space between the mounting flange and the periphery of the opening is closed by the seal member. Thereby, the watertightness (waterproofness) between an attachment flange and an opening part (periphery) can be ensured with a seal member.

Furthermore, the specific gravity of the fiber reinforced resin is smaller than that of the steel plate. Therefore, the box can be formed lighter than the steel box by forming the box from fiber reinforced resin. By making the box lighter, the weight of the rear structure of the vehicle body can be reduced.
In addition, the fiber reinforced resin has a lower thermal conductivity (thermal conductivity) than the steel plate. Therefore, by forming the box from fiber reinforced resin, it is possible to make it difficult for heat outside the vehicle compartment (outside the vehicle compartment) to be transferred to the inside of the box. Thereby, since it can suppress that the inside of a box is influenced by the heat outside a compartment, the cooling performance of a battery can be improved.

In the invention according to claim 3, the member storage portion is provided at the front side of the vehicle body by forming the front side of the mounting flange in a substantially U-shaped cross section. Furthermore, the front cross member can be stored in the member storage portion from the front side of the vehicle body.
By storing the front cross member in the member storage portion from the front side of the vehicle body, the front cross member can be brought closer to (close to) the box side. Therefore, a relatively large space can be secured on the vehicle body rear side of the box body by bringing the box body toward the kick-up portion side in front of the vehicle body. Thereby, for example, the capacity of the fuel tank provided on the vehicle body rear side of the box can be secured relatively large.

Further, by storing the front cross member in the member storage portion from the front side of the vehicle body, the lower surface of the mounting flange can be used as a seal support surface (lower seal support surface).
Thus, by supporting the seal member (lower seal member) with the lower seal support surface, the lower seal member can block between the lower surface and the peripheral edge of the opening to ensure watertightness between the vehicle exterior and the vehicle interior.

Further, by storing the front cross member in the member storage portion from the front side of the vehicle body, a seal support surface (upper seal support surface) can be provided on the upper surface of the mounting flange.
Thus, by supporting the seal member (upper seal member) with the upper seal support surface, the upper seal member closes the upper surface and the lid member, and the water tightness between the vehicle compartment and the inside of the box can be secured.
In this way, by storing the front cross member from the front side of the vehicle body in the member storage portion, only the lower seal member and the upper seal member can be used for watertightness between the exterior of the vehicle compartment and the interior of the vehicle compartment, Can be secured.

  In the invention according to claim 4, the front cross member is bridged between the left and right skeleton members. Thereby, the impact load (that is, the impact load generated by the side collision) applied from the side of the vehicle body rear structure can be supported by the front cross member.

In the invention according to claim 5, the collar is provided inside the front cross member, and the fastening member inserted through the collar is fastened to the left and right skeleton members and the kick-up portion.
Thereby, since the fastening force of the fastening member can be ensured by the collar, the front cross member can be firmly fastened to the left and right skeleton members and the kick-up portion.

In the invention which concerns on Claim 6, the rigidity of a cover member is fully securable by forming a cover member with a steel plate. Thereby, the load which acts downward from the seat cushion provided above the lid member can be suitably supported by the lid member.
Furthermore, the electromagnetic wave generated from the battery can be blocked by the lid member by forming the lid member with a steel plate. Thus, the lid member can prevent electromagnetic waves generated from the battery from entering the vehicle compartment.

In the invention which concerns on Claim 7, the duct communication part was opened to the attachment flange at the both ends of the box, and the duct communication part was connected to the vehicle interior via the cooling duct.
Therefore, the duct communication part of the box can be opened above the rear floor panel. Thus, the battery can be cooled using the air in the passenger compartment with a simple configuration in which the cooling duct is communicated with the duct communication portion.

  In the invention which concerns on Claim 8, the one end part of the box protruded to the vehicle width direction outer side, and the cable opening part was opened by the protruded one end part. Thereby, the motor provided outside the box can be easily connected to the battery by inserting the wire harness into the cable opening.

In the invention which concerns on Claim 9, the attachment hole and the fastening hole were provided in the attachment flange. Further, the mounting member is passed through the mounting hole to attach the front cross member to the mounting flange, and the fastening member is passed through the fastening hole to fasten the mounting flange, the front cross member and the lid member to the kick-up portion (that is, the main body). I did it.
Therefore, the mounting flange, the front cross member, and the lid member can be fastened to the kick-up portion with the front cross member attached to the mounting flange. Thereby, it is not necessary to position the mounting flange and the front cross member separately, and the mounting flange, the front cross member, and the lid member can be easily fastened without taking time and effort to the kick-up portion.

In the invention according to claim 10, the lower end portion of the collar is protruded to the kick-up portion through the front cross member. Therefore, a clearance (clearance) can be provided between the front cross member and the kick-up portion (main body).
Thereby, it can suppress suitably that the driving vibration of the main body side (vibration generated during driving) is transmitted to the box through the front cross member.

In the invention which concerns on Claim 11, the rear cross member was equipped with the flange attaching part and the anchor attaching part. Furthermore, a mounting flange is attached to the flange mounting portion, and a seat belt anchor is attached to the anchor mounting portion.
Therefore, it is not necessary to separately provide a member for attaching the flange attaching portion and a member for attaching the anchor attaching portion. Thereby, the number of parts can be reduced and the configuration can be simplified.

In the invention which concerns on Claim 12, the battery support member which supports a battery was provided, and the battery support member was attached to the front cross member with the attachment member.
Therefore, the heavy battery can be supported by the front cross member via the battery support member. Thereby, since the weight of the battery supported by the box can be reduced, the thickness of the box can be kept small, and the weight of the box can be reduced.

In the invention according to claim 13, the battery support member is stretched over the front cross member and the rear cross member.
Therefore, the heavy battery can be supported by the front cross member and the rear cross member via the battery support member. Thereby, since the weight of the battery supported by the box can be further reduced, the thickness of the box can be kept small, and the weight of the box can be reduced.

In the invention according to claim 14, a plurality of ribs are erected on the bottom of the box, and the battery is placed on the plurality of ribs to support the battery with the plurality of ribs.
Therefore, the heavy battery can be supported by the box made of fiber reinforced resin. Thereby, since it is not necessary to provide the support member which supports a battery separately, the support structure of a battery can be simplified.

It is a perspective view which shows the vehicle body rear part structure of Example 1 which concerns on this invention. It is a disassembled perspective view which shows the state which decomposed | disassembled the battery case from the vehicle body rear part structure of FIG. FIG. 3 is an exploded perspective view showing a state in which a rear floor panel is disassembled from the vehicle body rear structure of FIG. 2. 1 is a cross-sectional view showing a vehicle body rear part structure of Example 1. FIG. It is a disassembled perspective view which shows the state which decomposed | disassembled the battery case of FIG. FIG. 6 is an enlarged view of 6 parts in FIG. 4. It is a perspective view which shows the box of FIG. FIG. 7 is an enlarged view of 8 parts in FIG. 6. FIG. 9 is a sectional view taken along line 9-9 in FIG. 1. FIG. 10 is a sectional view taken along line 10-10 in FIG. It is the 11-11 line sectional view of Drawing 1. FIG. 7 is an enlarged view of 12 parts in FIG. 6. FIG. 13 is a cross-sectional view taken along line 13-13 in FIG. 1. FIG. 14 is an enlarged view of a portion 14 in FIG. 13. FIG. 15 is a view taken along arrow 15 in FIG. 1. FIG. 16 is a cross-sectional view taken along line 16-16 in FIG. 1. FIG. 17 is an enlarged view of part 17 in FIG. 16. It is sectional drawing which shows the vehicle body rear part structure of Example 2 which concerns on this invention. It is sectional drawing which shows the vehicle body rear part structure of Example 3 which concerns on this invention.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Note that “front (Fr)”, “rear (Rr)”, “left (L)”, and “right (R)” follow the direction seen from the driver.

The vehicle body rear structure according to the first embodiment will be described.
As shown in FIGS. 1 and 2, the vehicle body rear structure 10 includes a left and right skeleton member 11 provided at a predetermined interval in the vehicle width direction, and a kick spanned between the front end portions 11 a of the left and right skeleton members 11. An up portion 14, a front cross member 15 provided on the upper portion 14a of the kick up portion 14, and a rear cross member 17 (see also FIG. 3) provided at a predetermined interval behind the front cross member 15 in the vehicle body. I have.

  Further, the vehicle body rear structure 10 includes a rear floor panel 19 provided from the rear cross member 17 toward the rear of the vehicle body, an opening 21 provided between the upper portion 14a of the kick-up portion 14 and the rear floor panel 19, and an opening 21. A battery case 23 inserted in the vehicle body, a fuel tank 31 (see FIG. 4) provided at the rear of the battery case 23, and a rear seat 33 (see FIG. 4) provided above the battery case 23 and the rear floor panel 19. It has.

The vehicle body rear structure 10 is provided with an opening 21 between the upper portion 14a of the kick-up portion 14 and the rear floor panel 19, and a battery case 23 is accommodated in the opening 21, so that a large-capacity battery 58 (see FIG. 4) is mounted. Is possible.
By mounting a large-capacity battery 58 on the battery case 23, the vehicle body rear structure 10 can be applied to a hybrid vehicle.

The left skeleton member 11 includes a left side sill extension 12 and a left rear side frame 13.
The right skeleton member 11 is a member that is substantially symmetrical to the left skeleton member 11 and includes a right side sill extension 12 and a right rear side frame 13.

The kick-up portion 14 is a floor raised from the rear end portion 34a of the front floor panel 34 between the front end portions 11a of the left and right skeleton members 11, and spans the left and right front end portions 11a.
By providing the kick-up portion 14 at the rear end portion 34 a of the front floor panel 34, the rear floor panel 19 can be provided at a position raised above the front floor panel 34.
A plurality of fastening holes 28 are formed in the upper portion 14 a of the kick-up portion 14. A plurality of welding nuts 29 are provided on the back surface 14b of the upper portion 14a and coaxially with the plurality of fastening holes 28 (see FIG. 9).

The front floor panel 34 is provided between the left and right side sills 39.
The left skeleton member 11 extends from the rear end portion of the left side sill 39 toward the rear of the vehicle body. Further, the right skeleton member 11 extends from the rear end portion of the right side sill 39 toward the rear of the vehicle body.

The front cross member 15 is provided on the upper portion 14 a of the kick-up portion 14, and spans the front end portions 11 a of the left and right skeleton members 11.
The rear floor panel 19 is provided from the rear cross member 17 toward the rear of the vehicle body, so that the rear floor panel 19 is provided at a predetermined interval behind the front cross member 15 (that is, the upper portion 14a of the kick-up portion 14).

As shown in FIG. 3, the rear cross member 17 is provided on the rear surface 19 a of the rear floor panel 19 by being provided at a predetermined interval behind the vehicle body of the front cross member 15.
Thereafter, the cross member 17 is a member that can support the rear floor panel 19 by being spanned between the left and right skeleton members 11.

The rear cross member 17 is provided with a plurality of flange mounting portions 41 and left and right anchor mounting portions 43.
The plurality of flange attachment portions 41 have screw holes 41a for attaching the rear flange portion 63 (see FIG. 6) of the battery case 23. The left and right anchor attachment portions 43 are members for attaching the left and right seat belt anchors 42.

As described above, the rear cross member 17 is used to provide the plurality of flange mounting portions 41 and the left and right anchor mounting portions 43.
Therefore, it is not necessary to separately provide a member for attaching the plurality of flange attaching portions 41 and a member for attaching the left and right anchor attaching portions 43. Thereby, the number of parts can be reduced and the configuration can be simplified.

As shown in FIG. 2, an opening 21 is formed on the vehicle front side of the rear floor panel 19 (front end 19b).
The opening 21 is opened between the upper skeleton 14 a of the kick-up portion 14 and the front end 19 b of the rear floor panel 19 and between the left skeleton member 11 and the right skeleton member 11.
In other words, the opening 21 includes the upper portion 14a of the kick-up portion 14, the front end 19b of the rear floor panel 19, the left skeleton member 11 and the right skeleton member 11, and the peripheral edge 22 of the opening 21 is formed in a substantially rectangular shape in plan view. Yes.

As shown in FIG. 4, a battery case 23 is inserted into the opening 21, and a fuel tank 31 is provided behind the battery case 23 in the vehicle body.
Further, a rear seat 33 is provided above the battery case 23 and the rear floor panel 19.

  As shown in FIGS. 5 and 6, the battery case 23 includes a box 24 that can be inserted into the opening 21 from the vehicle compartment 45 side, a lid member 25 that covers the opening 24 a of the box 24, the box 24, and the opening. A lower seal member (seal member) 26 that closes the periphery 22 of the portion 21 and an upper seal member 27 that closes the box 24 and the lid member 25 are provided.

The box body 24 includes a box body 51 formed in a box shape from fiber reinforced resin (fiber reinforced plastic), and a mounting flange 61 formed integrally with an upper end portion 51 a of the box body 51.
By forming the box body 24 of fiber reinforced resin, the box body 24 can be easily formed into a deep drawing shape by injection molding, blow molding or the like.
Therefore, since the width dimension (dimension in the longitudinal direction of the vehicle body) W of the box body 24 can be kept small, a relatively large space 71 can be secured on the vehicle body rear side of the box body 24. Thereby, for example, the capacity of the fuel tank 31 provided on the vehicle body rear side of the box body 24 can be secured relatively large.

Furthermore, the specific gravity of the fiber reinforced resin is smaller than that of the steel plate. Therefore, by forming the box body 24 from fiber reinforced resin, the box body 24 can be formed lighter than a steel box body.
By forming the box body 24 lighter, the weight of the rear body structure 10 (see FIG. 1) can be reduced.

In addition, the fiber reinforced resin has a lower thermal conductivity (thermal conductivity) than the steel plate. Therefore, by forming the box body 24 with fiber reinforced resin, the heat of the exterior (hereinafter referred to as “vehicle exterior”) 46 of the vehicle interior 45 is transferred to the interior of the box body 24 (hereinafter referred to as “box interior”) 48. Can be difficult to communicate.
Thereby, since it can suppress that the box interior 48 is influenced by the heat of the vehicle interior exterior 46, the cooling performance of the battery 58 accommodated in the box interior 48 can be improved.

As shown in FIG. 7, the box body 51 is formed in a box shape with a front wall 52, a rear wall 53, a left side wall 54, a right side wall 55 and a bottom part 56. The bottom portion 56 is provided with a left half portion 56b below the right half portion 56a.
A battery storage space 48a is formed on the left half 56b side of the box body 48 of the box body 51, and a battery 58 is stored in the battery storage space 48a.

Here, as shown in FIG. 6, it is possible to secure a large battery storage space 48 a of the battery case 23 by inserting the battery case 23 into the opening 21.
Therefore, the battery (that is, a battery having a large capacity) 58 of the hybrid vehicle can be mounted in the battery storage space 48a.
Thereby, the large capacity battery 58 of a hybrid vehicle can be provided by providing the opening part 21 in the vehicle body structure of a gasoline vehicle. Therefore, the vehicle body structure of a gasoline vehicle can be used together with the vehicle body structure of a hybrid vehicle.

Further, as shown in FIG. 3, a plurality of flange mounting portions 41 and left and right anchor mounting portions 43 are provided using the rear cross member 17.
Therefore, the rear cross member 17 can also be used as a gasoline vehicle simply by removing the plurality of flange mounting portions 41 from the rear cross member 17.

The mounting flange 61 is provided on the outer periphery of the box body 51 (upper end portion 51 a) so as to have a substantially rectangular shape in plan view, and includes a plurality of mounting holes 35 and a plurality of fastening holes 36.
As shown in FIG. 5, the attachment hole 35 is a hole through which an attachment bolt (attachment member) 67 for attaching the front cross member 15 to the attachment flange 61 can pass.
The fastening hole 36 is a hole through which a fastening bolt (fastening member) 68 for fastening the mounting flange 61, the front cross member 15 and the lid member 25 to the upper portion (that is, the main body) 14a of the kick-up portion 14 can pass.

  As shown in FIG. 7, the mounting flange 61 includes a front flange portion 62 formed at the upper end portion of the outer surface of the front wall 52, a rear flange portion 63 formed at the upper end portion of the outer surface of the rear wall 53, and the left side wall 54. A left flange portion 64 formed at the upper end portion of the outer surface and a right flange portion (one end portion in the vehicle width direction) 65 formed at the upper end portion of the outer surface of the right side wall 55 are provided.

As shown in FIGS. 6 and 8, the front flange portion 62 is a portion of the mounting flange 61 on the front side of the vehicle body.
The front flange portion 62 includes a wall portion 73 projecting upward from the upper end portion 52a of the front wall 52, and an upper projecting portion 74 projecting from the upper edge 73a of the wall portion 73 toward the front of the vehicle body. And a lower projecting portion 75 projecting from the lower edge 73b of the wall portion 73 toward the front of the vehicle body.

  The front flange portion 62 is formed in a substantially U-shaped cross section by the wall portion 73, the upper projecting portion 74, and the lower projecting portion 75. Therefore, a member storage portion 76 having an opening on the front side of the vehicle body is formed in the front flange portion 62. Thus, the front cross member 15 is stored in the member storage portion 76 from the opening on the front side of the vehicle body.

By storing the front cross member 15 in the member storage portion 76 from the front side of the vehicle body, the front cross member 15 can be moved toward (closer to) the box body 24 side.
Therefore, the box body 24 is brought closer to the kick-up portion 14 side in front of the vehicle body, and a larger space 71 can be secured on the vehicle body rear side of the box body 24. Thereby, for example, a larger capacity of the fuel tank 31 provided on the vehicle body rear side of the box body 24 can be secured.

Further, by storing the front cross member 15 in the member storage portion 76 from the front side of the vehicle body, it is not necessary to provide the front cross member 15 on the lower surface or the upper surface of the front flange portion 62.
Therefore, a part of the lower seal support surface (seal support surface) 61a is formed on the lower surface of the front flange portion 62, and a part of the upper seal support surface (seal support surface) 61b is formed on the upper surface of the front flange portion 62. .

As shown in FIG. 9, a plurality of fastening holes 36 (see also FIG. 7) are formed in the upper overhanging portion 74, and a plurality of through holes 78 are formed in the lower overhanging portion 75. The plurality of fastening holes 36 and the plurality of through holes 78 are arranged coaxially.
Furthermore, as shown in FIG. 10, a plurality of attachment holes 35 (see also FIG. 7) are formed in the overhanging portion 74.

As shown in FIG. 8, the front cross member 15 is formed of a front member wall portion 81, a rear member wall portion 82, an upper member portion 83, and a lower member portion 84 so as to have a hollow shape having a substantially rectangular cross section.
In the front cross member 15, the upper member portion 83 is in contact with the upper overhang portion 74, the lower member portion 84 is in contact with the lower overhang portion 75, and the rear member wall portion 82 is in contact with the wall portion 73.

As shown in FIGS. 5 and 10, a plurality of mounting screw portions 85 are formed on the upper member portion 83 of the front cross member 15. The mounting screw portion 85 is arranged coaxially with respect to the mounting hole 35 of the mounting flange 61.
The front cross member 15 is attached to the attachment flange 61 by passing the attachment bolt 67 through the attachment hole 35 of the attachment flange 61 and screwing the attachment bolt 67 penetrated into the attachment screw portion 85.

As shown in FIGS. 5 and 9, a plurality of fastening holes 86 are formed in the upper member portion 83 of the front cross member 15, and a plurality of through holes 87 are formed in the lower member portion 84 of the front cross member 15.
The fastening hole 86 and the through hole 87 are formed coaxially with the fastening hole 36 and the through hole 78.

As shown in FIGS. 9 and 11, a plurality of collars 91 are erected on the inside (inside) 88 of the front cross member 15. The lower end portion 91 a of the collar 91 protrudes downward to the upper portion 14 a of the kick-up portion 14 through the through hole 87 of the front cross member 15 and the through hole 78 of the lower overhang portion 75.
Accordingly, the lower end portion 91 a of the collar 91 is positioned below the lower member portion 84 of the front cross member 15 by the height dimension H.

The collar 91 is formed in a hollow cylindrical shape so that the fastening bolt 68 can be fitted therein.
The fastening bolt 68 fitted in the collar 91 is screwed to the welding nut 29, whereby the lid member 25, the front flange portion 62 and the front cross member 15 are fastened to the upper portion 14 a of the kick-up portion 14 with the fastening bolt 68. Yes.

Further, the left end portion 15 a of the front cross member 15 is fastened to the front end portion 11 a of the left skeleton member 11 with a fastening bolt 68. Further, the right end portion 15 b (see FIG. 1) of the front cross member 15 is fastened to the front end portion 11 a of the right skeleton member 11 with a fastening bolt 68.
Therefore, as shown in FIG. 1, the front cross member 15 is stretched over the front end portion 11 a of the left skeleton member 11 and the front end portion 11 a of the right skeleton member 11. Thereby, the impact load (that is, the impact load generated by the side collision) applied from the side of the vehicle body rear structure 10 can be supported by the front cross member 15.

As shown in FIG. 9, the front flange member 62 is fastened together with the front cross member 15 to the upper portion 14a of the kick-up portion 14 with fastening bolts 68 (attached) with the front cross member 15 being stretched. ).
Therefore, the fastening force of the fastening bolt 68 can be secured by the collar 91. Thereby, the front cross member 15 can be firmly fastened to the front end portions 11 a of the left and right skeleton members 11 and the upper portion 14 a of the kick-up portion 14.

In a state where the front flange portion 62 is fastened to the upper portion 14 a of the kick-up portion 14 together with the front cross member 15, the lower end portion 91 a of the collar 91 is brought into contact with the upper portion 14 a of the kick-up portion 14.
Therefore, the lower member portion 84 of the front cross member 15 is held in a state of floating with respect to the upper portion 14 a of the kick-up portion 14.

That is, a clearance (clearance) can be provided between the front cross member 15 and the upper portion 14 a of the kick-up portion 14.
Thereby, it can suppress suitably that the running vibration (vibration which generate | occur | produces during driving | running | working) by the side of the kick-up part 14 (namely, main body) transmits to the box 24 via the front cross member 15.

As shown in FIG. 12, a rear flange portion 63 is formed at the outer surface upper end portion of the rear wall 53.
The rear flange portion 63 is formed with a plurality of fastening holes 36 into which the fastening bolts 68 can be fitted.
A fastening bolt 68 fitted into the fastening hole 36 of the rear flange portion 63 is screwed to the screw hole 41 a of the flange mounting portion 41. Accordingly, the lid member 25 and the rear flange portion 63 are fastened (attached) to the rear cross member 17 with the fastening bolts 68.
In this state, the front end portion 19 b of the rear floor panel 19 is interposed between the rear flange portion 63 and the rear cross member 17.

As shown in FIG. 6, the mounting flange 61 of the box body 24 is attached to the front cross member 15 and the rear cross member 17 with the box body 24 inserted into the opening 21.
Accordingly, the box body 24 can be firmly attached to the front cross member 15 and the rear cross member 17, so that the battery 58 housed in the box body 24 can be firmly supported by the front and rear cross members 15, 17.

As shown in FIG. 7, a left flange portion 64 is formed on the left side wall 54 of the box body 51, and a right flange portion 65 is formed on the right side wall 55 of the box body 51. That is, left and right flange portions 64 and 65 are formed at both ends (left and right end portions) of the box body 51 in the vehicle width direction.
A left duct communication portion (duct communication portion) 95 is opened in the left flange portion 64 in the vehicle width direction.
The right flange portion 65 protrudes outward (right side) in the vehicle width direction. A right duct communication portion (duct communication portion) 96 is opened in the right flange portion 65 in the vehicle width direction. Further, a cable opening 97 is opened in the right flange portion 65 in the vertical direction.

As shown in FIG. 13, the left flange portion 64 is placed on the front end portion 11 a of the left skeleton member 11, and the right flange portion 65 is placed on the front end portion 11 a of the right skeleton member 11.
The lower seal member 26 is pressed on the lower surface of the left flange portion 64 (see FIG. 17), and the lower seal member 26 is pressed on the lower surface of the right flange portion 65 (see FIG. 14).

Further, as shown in FIG. 8, when the front cross member 15 is stored in the member storage portion 76 from the front side of the vehicle body, the lower projecting portion 75 of the front flange portion 62 is placed on the upper portion 14 a of the kick-up portion 14. Has been.
The lower seal member 26 is pressed by the lower surface of the front flange portion 62 (specifically, the lower overhang portion 75).
That is, a part of the lower seal support surface 61 a is formed on the lower surface of the front flange portion 62.

Further, as shown in FIG. 12, the rear flange portion 63 is placed on the front end portion 19 b of the rear floor panel 19. The lower seal member 26 is pressed by the lower surface of the rear flange portion 63.
That is, a part of the lower seal support surface 61 a is formed on the lower surface of the rear flange portion 63.

Here, a lower seal support surface (seal support surface) 61 a of the attachment flange 61 is formed on each lower surface of the front flange portion 62, the rear flange portion 63, the left flange portion 64, and the right flange portion 65.
That is, the lower seal support surface 61 a is a surface that can support the lower seal member 26.
On the other hand, as shown in FIG. 2, the peripheral edge 22 of the opening portion 21 is formed by the front end portion 11 a of the left skeleton member 11, the front end portion 11 a of the right skeleton member 11, the upper portion 14 a of the kick-up portion 14, and the front end portion 19 b of the rear floor panel 19. Is formed.

Therefore, when the lower seal member 26 (see FIG. 6) is pressed by the lower seal support surface 61a of the mounting flange 61, the space between the lower seal support surface 61a and the peripheral edge 22 is closed by the lower seal member 26.
That is, the mounting flange 61 has a lower seal support surface 61 a that supports the lower seal member 26 that closes between the mounting flange 61 and the peripheral edge 22.
In this way, by sealing the space between the lower seal support surface 61 a and the peripheral edge 22 with the lower seal member 26, the sealing performance between the mounting flange 61 and the peripheral edge 22 of the opening 21 can be ensured. Thereby, the watertightness (waterproofness) of the vehicle interior exterior 46 (refer FIG. 6) and the vehicle interior 45 is securable.

Further, as shown in FIG. 8, the front cross member 15 is housed in the member housing portion 76 from the front side of the vehicle body, so that the lid flange 93 of the lid member 25 is placed on the upper projecting portion 74 of the front flange portion 62. Has been.
The upper seal member 27 is pressed on the upper surface of the front flange portion 62 (specifically, the upper overhang portion 74).
That is, a part of the upper seal support surface 61 b is formed on the upper surface of the front flange portion 62.

Therefore, as shown in FIG. 7, mounting is performed on the upper surface of the front flange portion 62 (specifically, the overhanging portion 74), the upper surface of the rear flange portion 63, the upper surface of the left flange portion 64, and the upper surface of the right flange portion 65. An upper seal support surface 61b of the flange 61 is formed.
The upper seal support surface 61 b is a surface that can support the upper seal member 27.
That is, the mounting flange 61 has an upper seal support surface 61 b that supports the upper seal member 27.
By supporting the upper seal member 27 with the upper seal support surface 61b, the upper seal member 27 can close the space between the upper seal support surface 61b and the lid flange 93 to ensure watertightness between the vehicle compartment 45 and the box interior 48. .

In this way, by storing the front cross member 15 from the front side of the vehicle body in the member storage portion 76 of the front flange portion 62, a part of the lower seal support surface 61a is formed on the lower surface of the front flange portion 62, and the front flange portion A part of the upper seal support surface 61 b is formed on the upper surface of 62.
Thereby, only the lower seal member 26 and the upper seal member 27 can secure the water tightness between the vehicle interior exterior 46 and the vehicle compartment 45 and the water tightness between the vehicle compartment 45 and the box interior 48.

As shown in FIGS. 5 and 6, the lid member 25 is disposed on the vehicle compartment 45 side in a state where the lid member 25 is attached to the attachment flange 61.
The lid member 25 is formed of a steel plate and has a lid flange 93 along the outer periphery.
The lid member 25 is attached to the attachment flange 61 by being fastened by the plurality of fastening bolts 68 while the lid flange 93 is placed on the attachment flange 61.

When the upper seal member 27 is pressed by the lid flange 93 of the lid member 25, the space between the lid flange 93 and the upper seal support surface 61 b is closed by the upper seal member 27. In this state, the opening 24 a of the box body 24 is covered with the lid member 25.
Thus, by closing the space between the lid flange 93 and the upper seal support surface 61b with the upper seal member 27, the water tightness between the lid flange 93 and the upper seal support surface 61b is ensured, and the waterproofness of the battery 58 is enhanced. Can do.

By forming the lid member 25 from a steel plate, the lid member 25 can have sufficient rigidity. As a result, a load acting downward from the seat 33 (seat cushion 33 a) provided above the lid member 25 can be suitably supported by the lid member 25.
Furthermore, by forming the lid member 25 from a steel plate, electromagnetic waves generated from the battery 58 can be blocked by the lid member 25. Thus, the lid member 25 can prevent electromagnetic waves generated from the battery 58 from entering the vehicle compartment 45.

Here, as shown in FIG. 10, the front cross member 15 is attached to the attachment flange 61 by screwing the attachment bolt 67 to the attachment screw portion 85.
Therefore, as shown in FIG. 2, the battery case 23 (the mounting flange 61, the front cross member 15, and the lid member 25) can be fastened to the main body with the fastening bolts 68 with the front cross member 15 attached to the mounting flange 61.
Thereby, when the battery case 23 is fastened to the main body, it is not necessary to position the mounting flange 61 and the front cross member 15 separately, and the battery case 23 can be easily fastened without taking time and effort.

As shown in FIG. 6, the battery support member 101 is provided in the battery storage space 48 a of the box body 24.
The battery support member 101 includes a front support wall 102 provided along the front wall 52, a rear support wall 103 provided along the rear wall 53, a bottom support portion 104 provided along the bottom portion 56, and A pair of front mounting pieces 105 (only one is shown) projecting from the upper end of the front support wall 102 toward the front of the vehicle body, and a rear mounting piece projecting from the upper end of the rear support wall 103 toward the rear of the vehicle body 106.
The front support wall 102, the rear support wall 103 and the bottom support portion 104 are formed in a concave shape, and the battery 58 is placed on the bottom support portion 104, whereby the battery 58 is supported by the battery support member 101.

As shown in FIG. 10, the front attachment piece 105 of the battery support member 101 is attached to the front flange portion 62 and the front cross member 15 with attachment bolts 67.
Therefore, the heavy battery 58 can be supported by the front cross member 15 via the battery support member 101. Thereby, since the weight of the battery 58 supported by the box body 24 can be reduced, the thickness of the box body 24 can be kept small, and the weight of the box body 24 can be reduced.

Further, by attaching the battery support member 101 (front mounting piece 105) to the front flange portion 62 and the front cross member 15 with mounting bolts 67, the battery support member 101 is attached to the box body 24 in the previous step of mounting the battery case 23 to the vehicle body. Can be attached.
Accordingly, the box body 24 can be attached to the vehicle body with the battery support member 101 attached to the box body 24, and the box body 24 can be attached to the vehicle body without taking time and effort.

As shown in FIG. 12, the rear attachment piece 106 of the battery support member 101 is attached to the rear cross member 17 with fastening bolts 68.
The rear mounting piece 106 is interposed between the mounting flange 61 and the lid flange 93.
Thereby, as shown in FIG. 6, the battery support member 101 is stretched over the front cross member 15 and the rear cross member 17.
Therefore, the heavy battery 58 can be supported by the front cross member 15 and the rear cross member 17 via the battery support member 101. Thereby, since the weight of the battery 58 supported by the box body 24 can be further reduced, the thickness of the box body 24 can be kept small, and the weight of the box body 24 can be reduced.

As shown in FIG. 5, the right flange portion 65 of the mounting flange 61 protrudes outward (right side) in the vehicle width direction, and the cable opening 97 is opened in the vertical direction in the protruded right flange portion 65.
The cable opening 97 is an opening through which the wire harness 111 (see FIG. 13) can be inserted.
As shown in FIGS. 13 and 14, the wire harness 111 is routed from the outside of the box body 24 (hereinafter referred to as “box body outside”) 112 through the cable opening 97 so as to be connectable to the battery 58.
Thus, by inserting the wire harness 111 into the cable opening 97, a motor, an engine, or the like provided in the box exterior 112 can be easily connected to the battery 58.

As shown in FIGS. 14 and 15, the grommet 113 is attached to the lower surface 65 a of the right flange portion 65 with a bolt 114, and the wire harness 111 is passed through the through hole 115 of the grommet 113.
By attaching the grommet 113 to the lower surface 65 a of the right flange portion 65, the cable opening 97 is closed with the grommet 113.
Further, the through-hole 115 is blocked by the wire harness 111 by passing through the through-hole 115 of the grommet 113.
As a result, the cable opening 97 is partitioned from the box exterior 112 by the grommet 113.

As shown in FIGS. 1 and 16, a left duct communication portion 95 is opened in the left flange portion 64 of the box body 51 in the vehicle width direction. By opening the left duct communication portion 95 in the left flange portion 64, the left duct communication portion 95 is opened above the rear floor panel 19.
A base end portion 116 a of a left cooling duct (cooling duct) 116 is communicated with the left duct communication portion 95, and a front end portion 116 b of the left cooling duct 116 is opened to the vehicle interior 45.

As shown in FIG. 17, when the base end portion 116a of the left cooling duct 116 is communicated with the left duct communication portion 95, the gap between the left duct communication portion 95 and the left cooling duct 116 (base end portion 116a) is blocked. Has been.
A base end portion 116 a of the left cooling duct 116 is opened to the upper portion 48 b of the battery storage space 48 a of the box body 51. Therefore, the cooled air in the passenger compartment 45 (hereinafter referred to as “cooling air”) can be guided from the base end portion 116a of the left cooling duct 116 to the upper portion 48b of the battery storage space 48a.

Further, as shown in FIGS. 1 and 16, a right duct communication portion 96 is opened in the right flange portion 65 of the box body 51 in the vehicle width direction. By opening the right duct communication portion 96 in the right flange portion 65, the right duct communication portion 96 is opened above the rear floor panel 19.
A base end portion 117 a of a right cooling duct (cooling duct) 117 is communicated with the right duct communication portion 96, and a distal end portion 117 b of the right cooling duct 117 is opened to the vehicle interior 45.
As a result, the cooling air can be guided from the base end portion 117 a of the right cooling duct 117 to the upper right portion 48 c of the box interior 48.

That is, it is possible to guide the cooling air from the left cooling duct 116 to the battery storage space 48a (upper part 48b) and to guide the cooling air from the right cooling duct 117 to the box body 48 (upper right part 48c). Therefore, the cooling air can be guided well to the entire area of the battery storage space 48a.
Thereby, the battery 58 can be more efficiently cooled with the cooling air.

Here, the air in the battery storage space 48a heated by the battery 58 moves upward.
Therefore, it becomes possible to mix the cooling air led from the left and right cooling ducts 116 and 117 well with the air in the battery storage space 48a heated by the battery 58, and to cool the battery 58 more efficiently. it can.

Further, by opening the left duct communication portion 95 in the left flange portion 64 and opening the right duct communication portion 96 in the right flange portion 65, the left and right duct communication portions 95, 96 can be opened above the rear floor panel 19. .
Therefore, the left cooling duct 116 can be communicated with the left duct communicating portion 95 and the right cooling duct 117 can be communicated with the right duct communicating portion 96 without providing an opening (communication port) in the rear floor panel 19.
Thereby, the box interior 48 can be communicated with the vehicle interior 45 with a simple configuration in which the left and right cooling ducts 116 and 117 are communicated with the left and right duct communication portions 95 and 96. Therefore, the battery 58 can be cooled using the air in the passenger compartment 45 with a simple configuration.

  Next, vehicle body rear structures of the second and third embodiments will be described with reference to FIGS. 18 and 19. In the vehicle body rear structure of the second and third embodiments, the same reference numerals are given to the same similar members as those of the vehicle body rear structure 10 of the first embodiment, and the description thereof is omitted.

The vehicle body rear structure 130 according to the second embodiment will be described.
As shown in FIG. 18, the vehicle body rear structure 130 is obtained by replacing the box body 24 of the first embodiment with a box body 131, and other configurations are the same as those of the vehicle body rear structure 10 of the first embodiment.

The box 131 is a box made of fiber reinforced resin, and a plurality of ribs 132 are erected on the bottom 56, and a plate 133 is provided along the bottom 56 at the upper ends of the plurality of ribs 132.
By providing the plurality of ribs 132 on the bottom portion 56, the bottom portion 56 can be reinforced with the plurality of ribs 132 so that the battery 58 can be supported.

According to the box body 131 of the second embodiment, the heavy battery 58 can be supported by the fiber reinforced resin box body 131 by placing the battery 58 on the plate 133.
Thereby, it is not necessary to provide the battery support member 101 (refer FIG. 6) of Example 1 separately, and the support structure of the battery 58 can be simplified further.

The vehicle body rear structure 140 according to the third embodiment will be described.
As shown in FIG. 19, the vehicle body rear structure 140 is obtained by replacing the battery support member 101 of the first embodiment with the battery support member 141, and other configurations are the same as those of the vehicle body rear structure 10 of the first embodiment.

As with the battery support member 101 of the first embodiment, the battery support member 141 has a pair of front mounting pieces 105 (only one of which is shown) attached to the front flange portion 62 and the front cross member 15 with mounting bolts 67. .
The battery support member 141 includes a pair of support plates 142 (the back side is not shown) on the front support wall 102. The pair of support plates 142 are connected to the left and right side portions 58 a of the battery 58 by bolts 143, so that the battery 58 is supported by the pair of support plates 142.

According to the battery support member 141 of Embodiment 3, the heavy battery 58 can be supported by the front cross member 15 via the battery support member 141.
Thereby, since the weight of the battery 58 supported by the box body 24 can be further reduced, the thickness of the box body 24 can be kept small, and the weight of the box body 24 can be reduced.

The vehicle body rear structure according to the present invention is not limited to the above-described embodiments, and can be changed or improved as appropriate.
For example, in the first embodiment and the third embodiment, the content of supporting the battery 58 by the battery support members 101 and 141 in the battery storage space 48a of the box body 24 has been described. It is also possible to store the battery 58 in the battery storage space 48 a without using 141.

  In addition, the vehicle body rear structure, left and right skeleton members, kick-up portions, front cross members, rear cross members, rear floor panels, openings, boxes, lid members, and lower seals shown in the first to third embodiments. Shapes of members, front floor panels, flange mounting parts, seat belt anchors, anchor mounting parts, batteries, collars, left and right duct communication parts, cable openings, battery support members, wire harnesses, left and right cooling ducts and ribs, etc. The configuration is not limited to that illustrated, but can be changed as appropriate.

  The present invention is suitable for application to an automobile having a vehicle body rear structure in which a front floor panel and a kick-up portion are provided, and a rear floor panel is provided behind the kick-up portion.

  DESCRIPTION OF SYMBOLS 10,130,140 ... Car body rear part structure, 11 ... Left and right frame | skeleton member, 14 ... Kick-up part, 15 ... Front cross member, 17 ... Rear cross member, 19 ... Rear floor panel, 21 ... Opening part, 24, 131 ... Box Body, 25 ... lid member, 26 ... lower seal member (seal member), 34 ... front floor panel, 34a ... rear end of front floor panel, 35 ... mounting hole, 36 ... fastening hole, 41 ... flange mounting portion 42 ... Anchor of seat belt, 43 ... Anchor mounting portion, 45 ... Cabin, 48 ... Inside of box (inside of box), 51 ... Box body, 58 ... Battery, 61 ... Mounting flange, 65 ... Right flange (One end in the vehicle width direction), 67 ... mounting bolt (mounting member), 68 ... fastening bolt (fastening member), 76 ... member housing part, 88 ... inside the member (inside the front cross member), 91 ... collar, 91 ... lower end of collar, 95 ... left duct communication part (duct communication part), 96 ... right duct communication part (duct communication part), 97 ... cable opening, 101, 141 ... battery support member, 111 ... wire harness, 112 ... outside of box (outside of box), 116 ... left cooling duct (cooling duct), 116a ... base end of left cooling duct, 116b ... tip of left cooling duct, 117 ... right cooling duct (cooling duct), 117a: proximal end of right cooling duct, 117b: distal end of right cooling duct, 132: rib.

Claims (14)

In the vehicle body rear structure in which the kick-up portion is raised between the left and right skeleton members from the rear end portion of the front floor panel, and the rear floor panel is provided behind the kick-up portion of the vehicle body,
A front cross member provided in the kick-up portion;
A rear cross member provided on the rear of the front cross member and bridged between the left and right skeleton members;
By providing the rear floor panel from the rear cross member toward the rear of the vehicle body, an opening opened between the kick-up portion and the rear floor panel;
A box that can be inserted into the opening from the passenger compartment side, is formed in a box shape that can store a battery therein, and has a mounting flange that can be attached to the front cross member and the rear cross member;
A lid member that can be mounted on the mounting flange and can be disposed on the vehicle compartment side;
A vehicle body rear structure characterized by comprising: The box body is made of a fiber reinforced resin, and a box-shaped box body capable of storing the battery and the mounting flange are integrally formed,
The vehicle body rear part structure according to claim 1, wherein the mounting flange has a seal support surface that supports a seal member that closes between a periphery of the mounting flange and the opening.   2. The mounting flange according to claim 1, further comprising: a member storage portion that can store the front cross member from the front side of the vehicle body by forming a front side portion of the mounting flange in a substantially U-shaped cross section. Item 2. The vehicle body rear structure according to Item 2.   The vehicle body rear part structure according to any one of claims 1 to 3, wherein the front cross member is bridged between the left and right skeleton members.   The vehicle body rear portion according to claim 4, wherein the front cross member is provided with a collar capable of fitting the left and right skeleton members and a fastening member fastened to the kick-up portion inside the front cross member. Construction.   The vehicle body rear part structure according to claim 1, wherein the lid member is formed of a steel plate. The box body has both ends in the vehicle width direction, and the duct communication portion is opened in the mounting flange.
The vehicle body rear part structure according to any one of claims 1 to 6, wherein a base end portion of a cooling duct is communicated with the duct communication portion, and a distal end portion of the cooling duct is opened to a vehicle compartment. In the box, one end in the vehicle width direction protrudes outward in the vehicle width direction, and a cable opening through which the wire harness can be inserted is opened at the protruded one end.
The vehicle body rear part structure according to any one of claims 1 to 7, wherein the wire harness is routed through the cable opening so as to be connectable to the battery from the outside of the box. The mounting flange is
A mounting hole through which a mounting member for mounting the front cross member to the mounting flange can pass;
A fastening hole through which the fastening member for fastening the mounting flange, the front cross member and the lid member to the kick-up portion can pass;
The vehicle body rear part structure according to any one of claims 5 to 8, characterized by comprising:   The vehicle body rear part structure according to any one of claims 5 to 9, wherein a lower end portion of the collar projects through the front cross member to the kick-up portion. The rear cross member is
A flange mounting portion for mounting the mounting flange;
An anchor mounting portion for mounting the seat belt anchor;
The vehicle body rear part structure according to any one of claims 1 to 10, further comprising: A battery support member for supporting the battery;
The vehicle body rear part structure according to any one of claims 9 to 11, wherein the battery support member is attached to the front cross member by the attachment member that can penetrate the attachment hole.   The vehicle body rear structure according to claim 12, wherein the battery support member is bridged between the front cross member and the rear cross member. The box has a plurality of ribs standing on the bottom of the box,
The vehicle body rear part structure according to any one of claims 2 to 13, wherein the battery can be supported by the plurality of ribs by placing the battery on the plurality of ribs.

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