JP2010241398A - Vehicle body rear part structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body rear part structure which reduces the weight without deteriorating the strength, suppresses bending of a reinforcement frame due to a load input on a vehicular rear surface, improves the strength of the vehicle body, and can be easily assembled. <P>SOLUTION: In the vehicle rear body structure 11, the reinforcement frame 15 extending in a longitudinal direction of the vehicle 12 is mounted on a rear floor 22 of an under body 21 of the vehicle body 13 from the lower side, and the load transmitted from the vehicular rear surface 16 is upwardly transmitted between a front end 51 and a rear end 52 of the reinforcement frame 15, and thus, a support part 53 provided suppresses bending. The support part 53 is connected to a support bracket 55 at a vehicle body 13 side. The support bracket 55 is fastened with a fastening mechanism (first fastening mechanism) 56 for mounting a fuel tank 23 arranged on the lower side of the rear floor 22. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle body rear structure in which a reinforcing frame that disperses a load input to the rear surface of a vehicle is provided under the floor of the vehicle.

  There is a vehicle body rear structure in which a reinforcing member is slanted from the center under the floor of the vehicle to the outside of the vehicle. For example, there is one in which strength is improved by providing a reinforcing member (tank frame) extending from the center of a rear floor cross member positioned between rear wheels to the front of the vehicle and to the left and right side sills (for example, Patent Document 1). (See FIG. 1)).

However, in the prior art (Patent Document 1), in order to further increase the strength of the tank frame (reinforcement frame), it is necessary to increase the cross-sectional area of the tank frame or to increase the thickness, thereby increasing the weight. There's a problem. Increasing the characteristics of the tank frame material increases the cost.
Further, when the resonance frequency of the tank frame (reinforcement frame) coincides with the input from the suspension, road noise is deteriorated. In order to prevent this, it is necessary to increase the resonance frequency of the tank frame. In order to increase the resonance frequency, it is necessary to increase the cross-sectional area of the tank frame and to increase the thickness of the tank frame, which increases the weight.

JP 2008-56189 A

  The present invention provides a vehicle body rear structure that achieves weight reduction without sacrificing strength, suppresses bending of the reinforcing frame due to a load input to the vehicle rear surface, improves vehicle body strength, and facilitates installation work. Let it be an issue.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a vehicle body rear structure in which a reinforcement frame extending in the vehicle front-rear direction is attached to the rear floor of the underbody of the vehicle body from below. A support portion that suppresses bending by transmitting a load transmitted from the rear surface of the vehicle upward is provided.

  The invention according to claim 2 is characterized in that the support portion is connected to the vehicle body side by a support bracket.

  In the invention according to claim 3, the support bracket is fastened by any one of the fastening mechanisms for attaching the vehicle-mounted parts such as the fuel tank, the canister, and the subframe disposed below the rear floor. It is characterized by being.

  The invention according to claim 4 is characterized in that the support bracket is coupled to an anti-sway stay that stops the oscillation of the fastening bolt included in the fastening mechanism for the subframe.

  The invention according to claim 5 is characterized in that the support portion is connected to the vehicle body side via an elastic mechanism.

  The invention according to claim 6 is characterized in that the support portion is provided with a connection bracket that comes into contact with the vehicle body side from a non-contact state by a load transmitted from the rear surface of the vehicle.

  In the invention which concerns on Claim 7, a connection bracket is connected by fitting or engagement, It is characterized by the above-mentioned.

  In the invention according to claim 1, since the support portion that suppresses the bending by transmitting the load transmitted from the rear surface of the vehicle upward is provided between the front end and the rear end of the reinforcement frame. It is not necessary to increase the strength by increasing the cross-sectional area or increasing the thickness, and reducing the weight of the reinforcing frame compared to increasing the strength of the reinforcing frame by increasing the cross-sectional area or increasing the thickness. Can do.

  By transmitting the load transmitted from the rear surface of the vehicle upward from the support portion, it is possible to suppress bending of the reinforcing frame due to the load input to the rear surface of the vehicle even if the reinforcing frame is lightweight.

  In the invention according to claim 2, since the support portion is connected to the vehicle body side by the support bracket, the strength of the vehicle body can be improved.

  In the invention according to claim 3, the support bracket is fastened by any one of the fastening mechanisms for attaching the vehicle-mounted parts such as the fuel tank, the canister, and the subframe disposed below the rear floor. Therefore, the mounting work for mounting the support bracket is easy.

  In the invention according to claim 4, since the support bracket is coupled to the anti-sway stay that stops the fastening bolt included in the fastening mechanism for the subframe, only the support bracket can be removed as necessary, Can be installed.

In the invention which concerns on Claim 5, since the support part is connected with the vehicle body side via the elastic mechanism, it can suppress more reliably the bending of the reinforcement frame by the load input into a vehicle rear surface.
Further, there is an advantage that a vehicle body side support portion to which a load is transmitted from the reinforcing frame can be set for a vehicle body side, for example, a component such as a subframe.

  In the invention according to claim 6, since the support portion is provided with a connecting bracket that comes into contact with the vehicle body side from the non-contact state by the load transmitted from the rear surface of the vehicle, the load from the support portion to the vehicle body side is provided. There is an advantage that the structure for transmitting is simple.

  In the invention which concerns on Claim 7, since a connection bracket is connected by fitting or engagement, it can fully transmit even a big load.

It is a side view of the vehicle body which employ | adopted the vehicle body rear part structure which concerns on Example 1 of this invention. FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. It is a figure explaining the attachment of the support bracket of the vehicle body rear part structure which concerns on Example 1. FIG. It is a figure explaining the mechanism which suppresses the bending of the reinforcement frame of the vehicle body rear part structure which concerns on Example 1. FIG. It is a figure explaining the vehicle body rear part structure which concerns on Example 2 of this invention. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 6. It is a figure explaining the vehicle body rear part structure which concerns on Example 3 of this invention. 10 is a perspective view of Example 3. FIG. FIG. 10 is a sectional view taken along line 10-10 in FIG. 9; It is a figure explaining the vehicle body rear part structure which concerns on Example 4 of this invention. 12 is a sectional view taken along line 12-12 of FIG. It is 13 arrow directional view of FIG.12 (b). It is a figure explaining the mechanism which suppresses the bending of the reinforcement frame of Example 4. FIG. It is a figure explaining the vehicle body rear part structure which concerns on Example 5 of this invention. FIG. 16 is a cross-sectional view taken along line 16-16 in FIG. 15. It is 17 arrow line view of FIG. It is a figure explaining the mechanism which suppresses the bending of the reinforcement frame of Example 5. FIG. It is a figure explaining the vehicle body rear part structure which concerns on Example 6 of this invention. It is a figure explaining the vehicle body rear part structure which concerns on Example 7 of this invention. It is a figure explaining the vehicle body rear part structure which concerns on Example 8 of this invention. It is a figure explaining the vehicle body rear part structure which concerns on Example 9 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail in Examples 1 to 9. The vehicle body rear structures of the first to ninth embodiments are substantially the same on the left and right sides, that is, substantially symmetric with respect to the center line C with respect to the vehicle width of the vehicle body.

  As shown in FIGS. 1 and 2, the vehicle body rear structure 11 according to the first embodiment is employed in a vehicle 12, and a reinforcement frame (brace) 15 extending in the front-rear direction (X-axis direction) of the vehicle 12 is attached to the bottom of the vehicle body 13. Thus, the load input to the vehicle rear surface 16 is dispersed. This will be specifically described below.

  The vehicle 12 includes a passenger compartment 17, a vehicle body 13, a fuel tank 23 disposed below the rear floor 22 of the underbody 21 that forms the floor of the vehicle body 13, and a canister 24 disposed away from the fuel tank 23 toward the rear of the vehicle 12. A sub-frame 25 attached to the vehicle body 13 from below.

The vehicle body 13 includes an underbody 21, left and right side bodies 27 that form the side walls of the passenger compartment 17, and a rear body 28.
The rear body 28 includes a rear panel 31 erected at the rear end of the rear floor 22 and a rear end panel 32 that is provided along the outside of the rear panel 31 and forms the vehicle rear surface 16.

  The underbody 21 includes left and right side sills 34, a middle floor cross member 35 provided between the left and right side sills 34, and left and right rear frames 36 that extend from the rear portion of the side sill 34 to the rear portion of the vehicle 12. A rear floor panel 37, a rear floor cross member 38 provided between the rear frames 36, a tank bracket 41 provided on the rear floor cross member 38 via the rear floor panel 37, and a rear floor cross member 38 via the rear floor panel 37. A canister frame 42 provided outside the vehicle and extending rearward of the vehicle 12, a subframe 25 attached to the rear frame 36 from below the vehicle 12, a spare pan 43 included in the rear floor panel 37, a spare pan cross member 44, a rear frame It includes a bumper beam 45 attached to 6 the rear end of a vehicle body rear portion structure 11, the.

Next, the vehicle body rear part structure 11 will be mainly described with reference to FIGS.
The vehicle body rear structure 11 is attached to a rear floor 22 of the underbody 21 of the vehicle body 13 from below, and a reinforcement frame 15 extending in the front-rear direction of the vehicle 12 is attached to be transmitted from the vehicle rear surface 16 between the front end 51 and the rear end 52 of the reinforcement frame 15. The support part 53 which suppresses bending by providing the load which was changed upward is provided.
The support portion 53 is connected to the vehicle body 13 side by a support bracket 55.
The support bracket 55 is fastened by a fastening mechanism (first fastening mechanism) 56 for attaching the fuel tank 23 disposed below the rear floor 22.

  “Vehicle rear surface 16” is a surface 58 of the rear bumper 57 including the rear end panel 32 and the bumper beam 45 extending outside the rear panel 31.

In the fuel tank 23, one end (front end) of the left and right tank bands 62 that receives the bottom 61 of the fuel tank 23 is attached to the rear floor panel 37 with bolts 63, and the other end (rear end) of the tank band 62 is first attached to the rear floor panel 37. It is attached by a fastening mechanism 56.
The first fastening mechanism 56 includes a tank bracket 41, a nut 64 fixed to the tank bracket 41, a bolt 65 screwed into the nut 64, and a hole 66 opened at the other end (rear end) of the tank band 62.

  The canister 24 is an existing configuration and processes volatile gas generated by gasoline in the fuel tank 23. The canister 24 extends from the fuel tank 23 to the spare pan cross member 44 and the spare pan 43 provided behind the vehicle 12 (X It is installed in the space set in the axial direction) and in the space 67 set between the subframe 25 and the rear floor panel 37 (Z-axis direction), and the canister band 71 is attached to the canister frame 42 by mounting. It has been.

  The subframe 25 is substantially in the form of a cross beam, and includes a front beam portion 73, a rear beam portion 74, a left beam portion 75, a right beam portion 76, and left and right subframe front fastening portions 77, and the front beam portion 73 is As shown in FIG. 3, the top portion 82 facing upward of the vehicle 12, the bottom portion 83 facing downward against the top portion 82, the front side portion 84 facing forward of the vehicle 12, and the rear side facing the front side portion 84. A closed cross section is formed with the rear side portion 85 facing toward the front side.

As shown in FIG. 3, the reinforcing frame (brace) 15 has one end (front end) 51 provided on the middle floor cross member 35, a first collar 91 provided inside the main body 87, and a second collar provided inside the middle floor cross member 35. 92 and a nut 93 are fixed, and the nut 93 is fixed by screwing a bolt 94 passed through the first collar 91 and the second collar 92.
Further, the other end (rear end) 52 is provided on the spare pan cross member 44, the third collar 96 is provided inside the main body 87, the fourth collar 97 and the nut 98 are fixed inside the spare pan cross member 44, and the nut 98 In addition, the bolt 101 passing through the third collar 96 and the fourth collar 97 is fixed by screwing.

2 to 4, the reinforcing frame (brace) 15 has a closed cross section with an upper side portion 103 facing upward of the vehicle 12 and a lower side portion 104 facing downward and facing the upper side portion 103. A closed cross section is formed in a square shape with an inner side portion 105 facing the inner side of the vehicle 12 and an outer side portion 106 facing the inner side portion 105 and facing the outer side of the vehicle 12.
And the support part 53 is set to the center of the both ends 51 and 52, and the support bracket 55 is couple | bonded with the upper side part 103 of the main body 87 by welding, for example.

Here, a portion from the center where the support bracket 55 is coupled to one end (front end) 51 is a brace front portion 111, and a portion from the center where the support bracket 55 is coupled to the other end (rear end) 52 is a brace rear portion 112.
The center is the center with respect to the entire length of the reinforcing frame (brace) 15.

  As shown in FIGS. 3 and 4, the support bracket 55 has a first bracket main body 114 standing on the upper side portion 103, a plate-like second bracket main body 115 attached to the upper end of the first bracket main body 114, and the second bracket main body 115. A hole 116 is formed concentrically with the nut 64 fixed to the tank bracket 41 at the end, and the second bracket body 115 is overlapped with the other end (rear end) 117 of the tank band 62 and fastened with the bolt 65 of the first fastening mechanism 56. Has been.

Next, the operation of the vehicle body rear structure 11 according to the first embodiment of the present invention will be described mainly with reference to FIG. FIG. 5 corresponds to FIG.
In the vehicle body rear structure 11 according to the first embodiment, when a load is input to the rear portion of the vehicle 12 as indicated by an arrow a1, the reinforcing frame (brace) 15 is deformed while transmitting the load from the center (support portion 53). Further, bending of the reinforcing frame (brace) 15 can be suppressed.
In addition, a decrease in the space 67 between the canister 24 and the spare pan 43 can be suppressed, and a decrease in the space 67 between the canister 24 and the fuel tank 23 can be suppressed.

Specifically, when a load is input to the vehicle rear surface 16 by another vehicle as indicated by an arrow a1, the spare pan 43 of the rear body 28 and the underbody 21 is deformed, and the reinforcing frame (brace) 15 from the spare pan cross member 44 is deformed. The load is transmitted to. The reinforcing frame (brace) 15 transmits and distributes the load from the first bracket body 114 of the support bracket 55 to the rear floor panel 37, so that deformation of the brace rear part 112 can be suppressed, and in particular, deformation of the brace front part 111 can be prevented. Can be suppressed.
As a result, since the forward deformation amount X1 by which the spare pan cross member 44 moves toward the front of the vehicle 12 is reduced, it is possible to suppress a decrease in the space 67 in the longitudinal direction of the vehicle 12 (X-axis direction).
Therefore, there is an advantage that a decrease in clearance between the fuel tank 23 and the canister 24 and between the canister 24 and the spare pan 43 is reduced.

In the vehicle body rear structure 11 according to the first embodiment, when the reinforcing frame (brace) 15 is attached, the support bracket 55 provided on the reinforcing frame (brace) 15 is attached to the other end (rear end) of the tank band 62 as shown in FIG. When the bolt 65 of the fastening mechanism (first fastening mechanism) 56 for attaching the fuel tank 23 is screwed over the 117, the fixing of the support bracket 55 is completed. Therefore, the mounting work of the support bracket 55 is easy.
In addition, the number of parts can be reduced and the weight can be reduced as compared with the case where a bracket or bolt / nut dedicated to the support bracket 55 is employed.

  Next, a vehicle body rear portion structure 11B according to Embodiment 2 of the present invention will be described with reference to FIGS. The same components as those in the first embodiment shown in FIGS.

The vehicle body rear structure 11B according to the second embodiment includes a support bracket 55B.
The support bracket 55 </ b> B is fastened by a fastening mechanism (second fastening mechanism) 121 for attaching the canister 24 disposed below the rear floor 22.

  The second fastening mechanism 121 includes a canister frame 42, a nut 122 provided on the canister frame 42, a bolt 123 screwed into the nut 122, and a canister band 71 fastened with the bolt 123.

  The support bracket 55B has a first bracket body 114B standing on the upper side portion 103, a plate-like second bracket body 115B attached to the upper end of the first bracket body 114B, and a hole 116 formed in the end of the second bracket body 115B. The second bracket body 115B is overlapped on the canister band 71 and is fastened with a bolt 123 (similar to the bolt 65) of the second fastening mechanism 121.

The vehicle body rear structure 11B according to the second embodiment exhibits the same operations and effects as the vehicle body rear structure 11 according to the first embodiment.
That is, the bending of the reinforcement frame 15B can be suppressed.
Since the forward deformation amount X1 by which the spare pan cross member 44 moves toward the front of the vehicle 12 is reduced, the reduction of the space 67 between the canister 24 and the spare pan 43 can be suppressed, and the canister 24 and the fuel tank 23 The decrease in the space 67 can be suppressed.
The mounting work of the support bracket 55B is easy.

  Next, a vehicle body rear portion structure 11C according to Embodiment 3 of the present invention will be described with reference to FIGS. The same components as those in the first embodiment shown in FIGS. 9 and 10 show the left side.

The vehicle body rear structure 11C according to the third embodiment includes a support bracket 55C.
The support bracket 55C is characterized in that it is fastened by a fastening mechanism (third fastening mechanism) 131 for attaching the subframe 25 arranged below the rear floor 22.
The support bracket 55C is coupled to an anti-sway stay 133 that stops the fastening bolt 132 included in the third fastening mechanism 131 for the subframe 25.

  Specifically, the support bracket 55C is formed with a groove-shaped bracket body 135, one end of the bracket body 135 is formed with a coupling end 136 joined to a reinforcing frame (brace) 15C, and the other end is a first joint end. A portion 137 is formed, and the bolt 141 is passed through the first joint end portion 137.

  The subframe 25 includes a third fastening mechanism 131 that attaches the left and right subframe front fastening portions 77 to the rear frame 36. The third fastening mechanism 131 protrudes downward from the rear frame 36 as shown in FIG. The lug member 142 having a U-shaped cross section, a collar 143 with a female thread portion, and a collar 143 with a female thread portion, which are placed inside the lug member 142, are concentrically attached to the collar 143 with a female thread portion, and the subframe front fastening portion 77 of the subframe 25 The ring-shaped buffer member 145 fitted to the circular tube portion 144, the anti-sway stay 133 having a hole 146 disposed concentrically with the buffer member 145, the hole 146 of the anti-sway stay 133, and the buffer member 145. And a fastening bolt 132 screwed into a collar 143 with a female thread portion.

  The buffer member 145 includes an outer cylinder 147 fitted in a circular pipe portion 144 formed in the sub-frame front fastening portion 77 of the sub-frame 25, an inner cylinder 148 through which the fastening bolt 132 is passed, an inner cylinder 148 and an outer cylinder 147. And an elastic body 151 connected to each other.

  The anti-sway stay 133 has one end fixed to the rear frame 36 with a bolt 152, the other end fixed to the rear frame 36 with a fastening bolt 132 via a lug member 142, and a reinforcing frame (brace) 15C continuously to the other end. The second joint end 153 extends toward the first joint end 137 so that the bolt 141 is passed through the second joint end 153.

The vehicle body rear portion structure 11C according to the third embodiment exhibits the same operations and effects as the vehicle body rear portion structure 11 according to the first embodiment.
In addition, only the support bracket 55C, in detail, can be removed or attached together with the reinforcing frame 15C as necessary.

  Next, a vehicle body rear portion structure 11D according to Embodiment 4 of the present invention will be described with reference to FIGS. FIG. 12B is a detailed view of a portion b in FIG. The same components as those in the first embodiment shown in FIGS.

The vehicle body rear portion structure 11D according to the fourth embodiment includes a support bracket 55D and a support portion 53D provided with the support bracket 55D.
The support portion 53D is connected to the vehicle body 13 via an elastic mechanism 161. Specifically, the through hole 162 is formed in the reinforcing frame (brace) 15D, and the collar 163 is fitted inside the reinforcing frame (brace) 15D concentrically with the through hole 162.
The “vehicle body 13 side” is the front beam portion 73D of the subframe 25D.

  The support bracket 55D is slidable in the vertical direction (Z-axis direction) of the vehicle 12 with respect to the front beam portion 73D disposed above the support portion 53D through the bracket member 164 through the through hole 162 and the collar 163 of the support portion 53D. Are connected using an elastic mechanism 161.

  The elastic mechanism 161 includes an outer cylinder 166, an inner cylinder 167, and an elastic body 168, and projects one end 171 of the inner cylinder 167 upward from the front beam portion 73D. That is, the lengths of the outer cylinder 166 and the elastic body 168 are made to substantially coincide with the height of the front beam portion 73D, and the length of the inner cylinder 167 is set longer than the height of the front beam portion 73D. The inner cylinder 167 and the elastic body 168 are integrally provided by fitting the outer cylinder 166 integrally with the fitting hole 172 of the front beam portion 73D.

  The bracket member 164 has one end portion 175 of the pull rod 174 fixed to the lower side portion 104 of the reinforcing frame (brace) 15D by a weld bead portion 176, and the other end of the pull rod 174 disposed above the elastic mechanism 161 that has passed therethrough. The portion 177 forms a retaining portion by disposing the disc 178 from the one end 171 of the inner cylinder 167 by a predetermined distance and fixing it with the weld bead portion 181. Reference numeral 182 denotes a nut portion that holds and reinforces the disc 178 and is fixed by a weld bead portion 183.

Next, the operation of the vehicle body rear structure 11D according to the fourth embodiment of the present invention will be mainly described with reference to FIG.
The vehicle body rear portion structure 11D according to the fourth embodiment exhibits the same functions and effects as the vehicle body rear portion structure 11 according to the first embodiment.
That is, when a load is input to the reinforcing frame (brace) 15D as indicated by the arrow d1, the reinforcing frame (brace) 15D starts to deform and pulls the pulling rod 174 downward. The plate 178 contacts the elastic mechanism 161, and the load is transmitted. At that time, when the other end 177 (disc 178) of the pulling rod 174 pushes the one end 171 of the inner cylinder 167 downward, the elastic body 168 is deformed to absorb the impact. Therefore, the bending of the reinforcing frame 15D can be more reliably suppressed.

  Subsequently, when the elastic body 168 is deformed, the disk 178 comes into contact with the front beam portion 73D of the subframe 25D, and a load is transmitted to the front beam portion 73D, so that the vehicle body 13 side, here, the subframe 25D, There is an advantage that the vehicle body side support portion 185 to which the load is transmitted from the reinforcing frame 15D can be set.

  In addition, since the amount of forward deformation in which the spare pan cross member 44 moves toward the front of the vehicle 12 is reduced, it is possible to suppress the reduction of the space with the canister 24 and the reduction of the space with the fuel tank 23. can do.

  Further, in the vehicle body rear structure 11D according to the fourth embodiment, the other end portion 177 (disc 178) of the pull rod 174 is usually separated from the front beam portion 73D as shown in FIG. There is an advantage that vibration is not transmitted.

  Next, a vehicle body rear portion structure 11E according to Embodiment 5 of the present invention will be described with reference to FIGS. The same components as those in the first embodiment shown in FIGS.

The vehicle body rear structure 11E according to the fifth embodiment includes a support portion 53E and a connection bracket 191.
The support portion 53E is provided with a connection bracket 191 that comes into contact with the vehicle body 13 side from a non-contact state due to a load transmitted from the vehicle rear surface 16.
The connection bracket 191 is connected by fitting.
The “vehicle body 13 side” is the front beam portion 73E of the subframe 25E.

The support portion 53E is a portion in which a through hole 192 is formed in the reinforcing frame (brace) 15E, a collar 193 is fitted concentrically to the through hole 192 and inside the reinforcing frame (brace) 15E.
Specifically, the connection bracket 191 includes a fitting rod 195 provided upright on the reinforcing frame (brace) 15E and a fitting opening 196 formed in the rear side portion 85 of the front beam portion 73E of the subframe 25E.

The fitting rod 195 is L-shaped, and is formed with a fitting tip 197 that coincides with the center of the fitting opening 196 at one end perpendicular to the main body 198 in the rear view of the vehicle 12 (viewpoint in FIG. 17). In addition, it is formed at a predetermined distance from the rear side 85 to the rear of the vehicle 12 in a side view (viewed in FIG. 16), and the other end of the main body 198 is coupled to the lower side 104 of the reinforcing frame (brace) 15E. .
In addition, although the fitting opening part 196 has penetrated the rear side part 85, the recessed part which does not penetrate is also possible.

Next, the operation of the vehicle body rear structure 11E according to the fifth embodiment of the present invention will be mainly described with reference to FIG.
The vehicle body rear portion structure 11E according to the fifth embodiment exhibits the same operations and effects as the vehicle body rear portion structure 11 according to the first embodiment.
That is, when a load is input to the reinforcing frame (brace) 15E as shown by the arrow e1, the reinforcing frame (brace) 15E starts to deform and moves the fitting rod 195 forward of the vehicle 12, and therefore the fitting tip 197. Fits into the fitting opening 196 of the subframe 25E. As a result, a load can be transmitted from the fitting rod 195 to the subframe 25E, and the strength of the reinforcing frame (brace) 15E can be improved.

  Further, the vehicle body rear structure 11E according to the fifth embodiment includes the fitting rod 195 and the fitting opening 196, so that the structure is simple.

  Next, a vehicle body rear portion structure 11F according to Embodiment 6 of the present invention will be described with reference to FIG. FIG. 19A is a view corresponding to FIG. 16, and FIG. 19B is a view taken in the direction of arrow b in FIG. 19A. The same components as those in the first embodiment shown in FIGS.

The vehicle body rear structure 11F according to the sixth embodiment includes a support portion 53F and a connection bracket 191F.
The support portion 53F is provided with a connection bracket 191F that comes into contact with the vehicle body 13 side from a non-contact state due to a load transmitted from the vehicle rear surface 16.
The connection bracket 191F is connected by fitting.
The “vehicle body 13 side” is the front beam portion 73 of the subframe 25.

The support portion 53F is also a portion where the fitting rod 195F is provided on the reinforcing frame (brace) 15.
Specifically, the connecting bracket 191F includes a fitting rod 195F attached along the reinforcing frame (brace) 15 and a fitting bracket 201 attached to the rear side portion 85 of the front beam portion 73 of the subframe 25.

The fitting rod 195F coincides with the center of the fitting opening 196F of the fitting bracket 201 at one end and passes through the fitting opening 196F in the rear view of the vehicle 12 (view point in FIG. 19B). The fitting front end portion 197F is formed in the main body 202 so as to be separated from the reinforcing frame (brace) 15 by a predetermined distance, and the other end of the main body 202 is fixed to the upper side portion 103 of the reinforcing frame (brace) 15. Yes.
The fitting bracket 201 has a fitting opening 196F in the center.

  The vehicle body rear structure 11F according to the sixth embodiment exhibits the same operations and effects as the vehicle body rear structure 11E according to the fifth embodiment.

  Next, a vehicle body rear portion structure 11G according to Embodiment 7 of the present invention will be described with reference to FIG. 20A is a view corresponding to FIG. 16, and FIG. 20B is a view taken in the direction of arrow b in FIG. 20A. The same components as those in the first embodiment shown in FIGS.

The vehicle body rear structure 11G according to the seventh embodiment includes a support portion 53G and a connection bracket 191G.
The support portion 53G is provided with a connection bracket 191G that comes into contact with the vehicle body 13 side from a non-contact state due to a load transmitted from the vehicle rear surface 16.
The connection bracket 191G is connected by fitting.
The “vehicle body 13 side” is the front beam portion 73 of the subframe 25.

The support portion 53G is also a part where the connection bracket 191G is provided on the reinforcing frame (brace) 15.
Specifically, the connecting bracket 191G includes a fitting bracket 201G having a lateral hole (fitting opening) 211 provided on the upper side portion 103 of the reinforcing frame (brace) 15, and a rear side portion of the front beam portion 73 of the subframe 25. And a fitting rod 195G attached to 85.

  The fitting rod 195 </ b> G has a fitting tip 197 </ b> G that coincides with the center of the lateral hole (fitting opening) 211 of the fitting bracket 201 </ b> G at one end in the rear view of the vehicle 12 (view point in FIG. 20B). Is formed at a predetermined distance from the lateral hole (fitting opening) 211 to the front of the vehicle 12 in a side view (viewpoint in FIG. 20A), and the other end of the main body 212 is connected to the sub-portion. The front beam portion 73 of the frame 25 is fixed to the rear side portion 85.

  The vehicle body rear structure 11G according to the seventh embodiment exhibits the same operations and effects as the vehicle body rear structure 11E according to the fifth embodiment.

  Next, a vehicle body rear structure 11H according to an eighth embodiment of the present invention will be described with reference to FIG. FIG. 21A is a view corresponding to FIG. 16, and FIG. 21B is a view taken in the direction of arrow b in FIG. The same components as those in the first embodiment shown in FIGS.

The vehicle body rear portion structure 11H according to the eighth embodiment is characterized by including a support portion 53H and a connection bracket 191H.
The support portion 53 </ b> H is provided with a connection bracket 191 </ b> H that comes into contact with the vehicle body 13 side from a non-contact state due to a load transmitted from the vehicle rear surface 16.
The connection bracket 191H is connected by fitting.
The “vehicle body 13 side” is the front beam portion 73 of the subframe 25.

The support portion 53H is also a part where the connection bracket 191H is provided on the reinforcing frame (brace) 15.
Specifically, the connecting bracket 191H includes a fitting bracket 201H provided upright on the upper side portion 103 of the reinforcing frame (brace) 15, a fitting rod 195H attached to the rear side portion 85 of the front beam portion 73 of the subframe 25, Consists of.

The fitting rod 195H coincides with the center of the fitting opening 196H of the fitting bracket 201H at one end and passes through the fitting opening 196H in the rear view of the vehicle 12 (view point in FIG. 21 (b)). The fitting front end portion 197 </ b> H is formed on the main body 221, and the other end of the main body 221 is attached to the rear side portion 85 of the front beam portion 73 of the subframe 25.
The fitting bracket 201H has a fitting opening 196H in the center.

  The vehicle body rear portion structure 11H according to the eighth embodiment exhibits the same functions and effects as the vehicle body rear portion structure 11E according to the fifth embodiment.

  Next, a vehicle body rear portion structure 11J according to Embodiment 9 of the present invention will be described with reference to FIG. FIG. 22 corresponds to FIG. The same components as those in the first embodiment shown in FIGS.

The vehicle body rear structure 11J according to the ninth embodiment includes a support portion 53J and a connection bracket 191J.
The support portion 53J is provided with a connection bracket 191J that comes into contact with the vehicle body 13 side from a non-contact state due to a load transmitted from the vehicle rear surface 16.
The connection bracket 191J is connected by engagement.
The “vehicle body 13 side” is the rear beam portion 74 of the subframe 25.

The support portion 53J is also a part where the connection bracket 191J is provided on the reinforcing frame (brace) 15.
Specifically, the connection bracket 191J includes a brace bracket 231 attached to the reinforcing frame (brace) 15 and a subframe bracket 233 attached to the front side portion 232 of the rear beam portion 74 of the subframe 25.
The brace bracket 231 stands a first engagement lug 234 extending from the upper side portion 103 of the reinforcing frame (brace) 15 to the upper subframe 25, and forms a first engagement portion 235 in the first engagement lug 234. .
The sub-frame bracket 233 is formed by forming a second engagement portion 237 that engages with the first engagement portion 235 on the second engagement lug 241, and attaching the second engagement lug 241 to the rear beam portion 74. 12 projecting forward.

The vehicle body rear portion structure 11J according to the ninth embodiment exhibits the same operations and effects as the vehicle body rear portion structure 11E according to the fifth embodiment.
That is, when a load is input to the reinforcing frame (brace) 15, the reinforcing frame (brace) 15 is deformed and moves the brace bracket 231 forward of the vehicle 12, so that the first engaging portion 235 of the brace bracket 231 is moved. Engage with the second engagement portion 237 of the sub-frame bracket 233 as indicated by a two-dot chain line.

  The vehicle body rear structure of the present invention is suitable for a vehicle.

  DESCRIPTION OF SYMBOLS 11 ... Vehicle body rear structure, 12 ... Vehicle, 13 ... Vehicle body, 15 ... Reinforcement frame, 16 ... Vehicle rear surface, 21 ... Underbody, 22 ... Rear floor, 23 ... Fuel tank, 24 ... Canister, 25 ... Subframe, 51 ... Reinforcement frame Front end of the reinforcing frame 52 ... rear end of the reinforcing frame 53 ... support part 55 ... support bracket 55B ... support bracket 55C ... support bracket 56 ... fastening mechanism (first fastening mechanism) 121 ... fastening mechanism (second fastening) Mechanism), 131 ... fastening mechanism (third fastening mechanism), 132 ... fastening bolt, 133 ... anti-sway stay, 161 ... elastic mechanism, 191 ... connecting bracket, 191F ... connecting bracket, 191G ... connecting bracket, 191H ... connecting bracket, 191J: Connecting bracket.

Claims (7)

In the rear structure of the vehicle body in which a reinforcement frame extending in the vehicle front-rear direction is attached to the rear floor of the underbody of the vehicle body from below,
A vehicle body rear structure, characterized in that a support portion is provided between a front end and a rear end of the reinforcing frame to suppress bending by transmitting a load transmitted from the vehicle rear surface upward.   The vehicle body rear structure according to claim 1, wherein the support portion is connected to the vehicle body side by a support bracket.   The support bracket is fastened by any one fastening mechanism of each fastening mechanism for mounting on-vehicle components such as a fuel tank, a canister, a subframe, and the like disposed below the rear floor. The vehicle body rear structure according to claim 2.   The vehicle body rear structure according to claim 3, wherein the support bracket is coupled to an anti-sway stay that stops an oscillation of a fastening bolt included in the fastening mechanism for the subframe.   The vehicle body rear structure according to claim 1, wherein the support portion is connected to the vehicle body side via an elastic mechanism.   The vehicle body rear structure according to claim 1, wherein the support portion is provided with a connection bracket that comes into contact with the vehicle body side from a non-contact state by a load transmitted from the vehicle rear surface.   The vehicle body rear part structure according to claim 6, wherein the connection bracket is connected by fitting or engagement.

Images