Vehicle rear structure

Abstract

The vehicle rear structure according to the present application is a vehicle rear structure capable of improving the safety of a vehicle, without causing a spare tire to jump upward from a rear floor when an impact load is input from the rear of the vehicle body, by separating the spare tire from the rear floor. The vehicle rear structure includes: a spare tire bracket formed longer toward the rear of the vehicle than a spare tire fixing portion; a spare tire fixed to the spare tire fixing portion; and a reinforcing member having a second inclined reinforcing portion extending upward from the rear of the rear floor toward the front of the vehicle. The spare tire bracket has a first bendable portion provided at a position further toward the rear of the vehicle than the spare tire fixing portion. The reinforcing member has a second bendable portion provided at a position further toward the rear of the vehicle than the spare tire fixing portion.

Description

[0001] This application is based on Japanese Patent Application No. 2022-024968 filed on February 21, 2022, and the content thereof is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to a vehicle rear structure. BACKGROUND

[0003] As a vehicle rear structure, a structure is known in which a reinforcement member is connected to a lower surface of a cargo storage portion in a vehicle front-rear direction, and a tow hook is provided at a rear end portion of the reinforcement member. The reinforcement member is provided with a weak portion (i.e., a bendable portion) at a position near the tow hook. A second weak portion (i.e., a second bendable portion) is provided in front of the vehicle body from the weak portion.

[0004] In this vehicle rear structure, the reinforcement member is bent at the weak portion and the second weak portion, for example, due to an impact load input at a rear collision. Therefore, the bending of the reinforcement member caused by the impact load is controlled, and the impact load can be absorbed by the reinforcement member. Thus, it is possible to suppress an influence on a cargo stored in the cargo storage portion and a rear seat arranged in front of the cargo storage portion in the vehicle body (for example, refer to Japanese Patent Application Publication No. 2015-93617).

[0005] In addition, as a vehicle rear structure, a structure is known in which a reinforcement member is connected to a lower surface of a spare tire cover (hereinafter, also referred to as a rear floor) in a vehicle front-rear direction, and a tow hook is provided at a rear end portion of the reinforcement member. A spare tire is inclinedly arranged in the rear floor in a state of being inclined in a rearward direction with a front portion positioned higher than a rear portion. The reinforcement member is divided into a reinforcement member front portion and a reinforcement member rear portion. The reinforcement member is bent in a convex shape downward at a division position of the reinforcement member front portion and the reinforcement member rear portion, for example, by an impact load input at a rear collision. Thereby, the impact load is absorbed by the reinforcement member.

[0006] In this vehicle rear structure, the rear floor is deformed by an impact load input by a rear collision, and thus the spare tire inclinedly arranged in a rearward direction is separated from the spare tire carrier (i.e., the rear floor). In this state, the rear portion of the spare tire jumps up with the front portion as a center. In this way, the behavior (movement) of the spare tire is controlled so that the spare tire is rotated toward the vehicle front, and thus it is possible to prevent the spare tire from contacting the rear seat (for example, refer to Japanese Patent Application Publication No. 2011-111026). SUMMARY

[0007] However, in the vehicle rear structure of Japanese Patent Application Publication No. 2015-93617, the cargo is separated from the cargo storage portion when the reinforcement member is bent by the impact load to absorb the impact load. Therefore, it is difficult to appropriately control the movement of the cargo.

[0008] For example, in a case where a spare tire is loaded as a load in a load housing portion (so-called rear underpan), the spare tire is separated from the load housing portion also at the time of absorbing the impact load. Therefore, it is difficult to appropriately control the movement of the spare tire, and it is difficult to seek improvement in the safety of the vehicle.

[0009] The vehicle rear structure of Japanese Patent Application Publication No. 2011-111026 separates the spare tire from the rear underpan at the time of absorbing the impact load by bending the reinforcing member. Therefore, it is difficult to appropriately control the movement of the spare tire, and it is difficult to seek improvement in the safety of the vehicle.

[0010] The aspect of the present application provides a vehicle rear structure that does not separate a spare tire from a rear underpan and causes a rear portion of the spare tire to jump upward when an impact load is input from a rear of a vehicle body, thereby enabling improvement in the safety of the vehicle.

[0011] The aspect of the present application proposes the following structure.

[0012] (1) The vehicle rear structure of the present application includes a rear underpan (for example, the rear underpan 15 of the embodiment), a spare tire cradle (for example, the spare tire cradle 16, 102 of the embodiment) provided on an upper surface of the rear underpan and formed longer in a vehicle rear direction with respect to a spare tire fixing portion (for example, the spare tire fixing portion 51 of the embodiment) of the spare tire cradle than in a vehicle front direction with respect to the spare tire fixing portion, a spare tire (for example, the spare tire 17 of the embodiment) fixed to the spare tire fixing portion, a reinforcing member (for example, the reinforcing member 18, 103 of the embodiment) provided on a lower surface of the rear underpan and having an inclined portion (for example, the second inclined reinforcing portion 63 of the embodiment) extending upward from a rear portion (for example, the rear portion 15d of the rear underpan of the embodiment) of the rear underpan toward the vehicle front direction, and a hook (for example, the towing hook 21 of the embodiment) provided on a rear portion (for example, the rear portion 18b of the reinforcing member of the embodiment) of the reinforcing member, the spare tire cradle having a first easily bendable portion (for example, the first easily bendable portion 47, 105 of the embodiment) provided at a position further in the vehicle rear direction than the spare tire fixing portion that fixes the spare tire, and the reinforcing member having a second easily bendable portion (for example, the second easily bendable portion 62, 106 of the embodiment) provided at a position further in the vehicle rear direction than the spare tire fixing portion.

[0013] By being configured as in the aspect of (1) above, for example, when an impact load is input to the hook due to a rear collision, an upward load is input to the inclined portion of the reinforcement member toward the front of the vehicle. Therefore, the first and second easily bendable portions can be bent upward by the upward load input to the inclined portion. Thus, the load input to the inclined portion of the reinforcement member can be absorbed by the reinforcement member, the spare tire carrier 16, or the like.

[0014] Here, the first and second easily bendable portions are provided at positions that are further to the rear of the vehicle than the spare tire fixing portion. Further, the spare tire carrier is formed longer to the rear of the vehicle with respect to the spare tire fixing portion than to the front of the vehicle with respect to the spare tire fixing portion, so that the portion to the rear of the vehicle is securely provided to the rear floor.

[0015] Therefore, it is possible to suppress the spare tire fixing portion from separating from the rear floor when the first and second easily bendable portions are bent upward by the upward load input to the inclined portion. Thus, it is possible to make the rear of the vehicle side of the spare tire fixing portion jump upward together with the rear floor.

[0016] Therefore, when an impact load is input from the rear of the vehicle body, it is possible to make the rear of the spare tire jump upward without separating the spare tire from the rear floor in a state in which the spare tire is fixed to the spare tire fixing portion. Thus, it is possible to appropriately control the behavior (movement) of the spare tire to turn the spare tire toward the front of the vehicle, for example, and it is possible to prevent the spare tire from contacting the rear seat. Thus, it is possible to improve the safety of the vehicle.

[0017] (2) In the aspect of (1) above, the first easily bendable portion and the second easily bendable portion can be fragile portions.

[0018] The fragile portions can be easily formed by, for example, a broken portion, a notch, a hole portion, a thin-walled portion, or the like. In this way, by making the first and second easily bendable portions fragile portions, it is possible to form the first and second easily bendable portions with a simple shape and at a suppressed cost.

[0019] (3) In the aspect of (1) above, the first easily bendable portion and the second easily bendable portion can be provided at the same position in the front-rear direction of the vehicle.

[0020] By being configured as in the aspect (3) above, when an upward load is input to the inclined portion of the reinforcement member toward the front of the vehicle, stress can be concentrated in the same position in the vehicle front-rear direction (i.e., the first and second bendable portions) in the spare tire carrier and the reinforcement member. Therefore, the spare tire carrier and the reinforcement member can be reliably (appropriately) bent together with the rear floor at a position behind the spare tire fixing portion. Thus, the rear portion of the spare tire can be reliably (appropriately) jumped upward without the spare tire being separated from the rear floor, and the safety of the vehicle can be reliably improved.

[0021] (4) In the aspect (3) above, the first and second bendable portions can be arranged on the same center (e.g., the same center O1 of the embodiment) of a circular arc (e.g., the first and second circular arcs 71 and 72 of the embodiment) and on the same normal line (e.g., the same normal line 73 of the embodiment).

[0022] By being configured as in the aspect (4) above, when an upward load is input to the inclined portion of the reinforcement member toward the front of the vehicle, the first and second bendable portions can be concentrated on the same normal line in the spare tire carrier and the reinforcement member. Therefore, the spare tire carrier and the reinforcement member can be reliably (appropriately) bent together with the rear floor at a position behind the spare tire fixing portion. Thus, the rear portion of the spare tire can be reliably (appropriately) jumped upward without the spare tire being separated from the rear floor.

[0023] (5) In the aspect (1) above, the first and second bendable portions can be arranged at positions staggered in the vehicle front-rear direction.

[0024] By being configured as in the aspect (5) above, when an upward load is input to the inclined portion of the reinforcement member toward the front of the vehicle, the places where stress is concentrated in the vehicle front-rear direction can be dispersed in the spare tire carrier and the reinforcement member. Therefore, the rigidity of the entire spare tire carrier, reinforcement member, and rear floor can be appropriately ensured. Thus, the reaction force that supports the upward load input to the inclined portion of the reinforcement member can be appropriately ensured.

[0025] In this state, the spare tire carrier is bent at the first bendable portion by the load exceeding the reaction force. Thus, the reinforcement member can be bent at the second bendable portion. Therefore, the load input to the inclined portion of the reinforcement member can be absorbed by the spare tire carrier, the reinforcement member, and the rear floor.

[0026] On the other hand, the spare tire carrier is bent at the first bendable portion, and the reinforcing member is bent at the second bendable portion. Thus, the spare tire carrier and the reinforcing member can be reliably (appropriately) bent together with the rear floor at a position further rearward of the spare tire fixing portion.

[0027] Thus, the rear portion of the spare tire can be reliably (appropriately) jumped upward without separating the spare tire from the rear floor.

[0028] (6) In the aspect of (5) above, the first bendable portion and the second bendable portion can be arranged on the same center (e.g., the same center O2 of the embodiment) of a circular arc (e.g., the first circular arc 111 and the second circular arc 112 of the embodiment) and on different normals (e.g., the first normal 114 and the second normal 115 of the embodiment).

[0029] With this configuration, when an upward load is input to the inclined portion of the reinforcing member toward the front of the vehicle, the place where stress is concentrated in the vehicle longitudinal direction can be dispersed to the spare tire carrier and the reinforcing member. Thus, the rigidity of the entire spare tire carrier, reinforcing member, and rear floor can be appropriately ensured. Thus, the reaction force that supports the upward load input to the inclined portion of the reinforcing member can be appropriately ensured.

[0030] In this state, the spare tire carrier is bent at the first bendable portion by the load exceeding the reaction force. Thus, the reinforcing member can be bent at the second bendable portion. Thus, the load input to the inclined portion of the reinforcing member can be absorbed by the spare tire carrier, reinforcing member, and rear floor.

[0031] On the other hand, the spare tire carrier is bent at the first bendable portion, and the reinforcing member is bent at the second bendable portion. Thus, the spare tire carrier and the reinforcing member can be reliably (appropriately) bent together with the rear floor at a position further rearward of the spare tire fixing portion.

[0032] Thus, the rear portion of the spare tire can be reliably (appropriately) jumped upward without separating the spare tire from the rear floor.

[0033] (7) In the aspect of (1) above, the first bendable portion and the second bendable portion can be provided in a ridge portion (e.g., the floor ridge portion 33 of the embodiment) extending in the vehicle width direction in the rear floor.

[0034] By being configured as in the aspect (7) described above, the ridge portion can be provided at the vehicle rear side of the spare tire fixing portion. Therefore, when the spare tire carrier is bent at the first bendable portion by the load input to the inclined portion of the reinforcement member, and the reinforcement member is bent at the second bendable portion, the rear floor can be bent at the ridge portion provided at the vehicle rear side of the spare tire fixing portion.

[0035] Thus, it is possible to suppress the spare tire fixing portion from separating from the rear floor, and to make the vehicle rear side of the spare tire fixing portion more reliably jump upward together with the rear floor. Therefore, in a state where the spare tire is fixed to the spare tire fixing portion, it is possible to make the rear portion of the spare tire jump upward without separating the spare tire from the rear floor.

[0036] (8) In the aspect (1) described above, the vehicle rear structure can have a pair of rear side frames (for example, the left and right rear side frames 11 and 12 of the embodiment) extending in the vehicle front-rear direction in a state of being provided at the vehicle width direction outer sides of the rear floor, and a rear cross member (for example, the floor cross member 22 of the embodiment) extending in the vehicle width direction by being erected on the pair of rear side frames, and provided at the lower surface of the rear floor, and a portion of the reinforcement member on the vehicle front side with respect to the inclined portion (for example, the connection portion 61b of the embodiment) can be connected to the rear cross member.

[0037] By being configured as in the aspect (8) described above, the portion of the reinforcement member on the vehicle front side with respect to the inclined portion can be reinforced by the rear cross member. Therefore, it is possible to appropriately ensure the reaction force that supports the upward load input to the inclined portion of the reinforcement member by the reinforcement member, and to support the reinforcement member between the hook and the rear cross member. In this state, by the load exceeding the reaction force, it is possible to reliably bend the spare tire carrier at the first bendable portion, and to reliably bend the reinforcement member at the second bendable portion. Therefore, it is possible to reliably jump the rear portion of the spare tire upward without separating the spare tire from the rear floor.

[0038] (9) In the aspect (1) described above, the reinforcement member can have a third bendable portion (for example, the third bendable portion 64 of the embodiment) formed of the fragile portion, provided at a position on the vehicle rear side with respect to the second bendable portion.

[0039] For example, consider a case where an impact load caused by a rear collision is input horizontally toward the front of the vehicle. In this case, it is also considered that the upward load input to the inclined portion of the reinforcement member is small. Thus, a third bendable portion is provided in the reinforcement member at a position that is further to the rear of the vehicle than the second bendable portion. Therefore, even in the case where the upward load input to the inclined portion of the reinforcement member is small, the second bendable portion can be bent by bending the third bendable portion to be bent in a Z shape.

[0040] Thus, the second bendable portion can be moved upward together with the first bendable portion of the spare tire carrier. Therefore, in a state where the spare tire is fixed to the spare tire fixing portion, the rear portion of the spare tire can be jumped upward without separating the spare tire from the rear floor.

[0041] According to the aspect of the application, when an impact load is input from the rear of the vehicle body, the rear portion of the spare tire can be jumped upward without separating the spare tire from the rear floor. Therefore, the safety of the vehicle can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 is a plan view showing a vehicle rear structure in an embodiment of the application.

[0043] Figure 2 is a sectional view taken along the line II-II of Figure 1 .

[0044] Figure 3 is a perspective view showing the vehicle rear structure in the embodiment of the application as viewed from the upper left.

[0045] Figure 4 is a sectional view taken along the line IV-IV of Figure 3 .

[0046] Figure 5 is a perspective view showing the vehicle rear structure in the embodiment of the application as viewed from the lower left.

[0047] Figure 6 is a sectional view showing the VI portion of Figure 4 enlarged.

[0048] Figure 7 is a sectional view showing an example in which an impact load is input to the reinforcement member of the vehicle rear structure in the embodiment of the application due to a rear collision.

[0049] Figure 8 is a sectional view showing an example in which the reinforcement member is bent in a Z shape under the action of a load input to the reinforcement member in the embodiment of the application.

[0050] Figure 9is a cross-sectional view illustrating an example in which the rear portion of the spare tire jumps upward under the action of a load input to the reinforcement member in the embodiment of the present application.

[0051] Figure 10 is a cross-sectional view illustrating an example in which an impact load is input to the trailer hitch of the vehicle rear structure in the embodiment of the present application through a rear collision.

[0052] Figure 11 is a cross-sectional view illustrating an example in which the reinforcement member is bent into a V shape under the action of a load input to the trailer hitch in the embodiment of the present application.

[0053] Figure 12 is a cross-sectional view illustrating an example in which the rear portion of the spare tire jumps upward under the action of a load input to the trailer hitch in the embodiment of the present application.

[0054] Figure 13 is a cross-sectional view of a vehicle rear structure of a modification. DETAILED DESCRIPTION

[0055] Hereinafter, a vehicle rear structure of an embodiment of the present application will be described based on the drawings. In the drawings, an arrow FR indicates the front of the vehicle, an arrow UP indicates the upper of the vehicle, and an arrow LH indicates the left side of the vehicle.

[0056] [EMBODIMENT]

[0057] <VEHICLE REAR STRUCTURE>

[0058] Figure 1 is a plan view of the vehicle rear structure 10 in the embodiment. Figure 2 is a cross-sectional view taken along the line II-II of Figure 1 .

[0059] As shown in Figure 1 , Figure 2 , the vehicle Ve is, for example, a sport utility vehicle (SUV), and a trailer hitch TH is sometimes installed in the rear end portion (refer to Figure 10 ). The trailer hitch TH is, for example, a device for towing a trailer for loading a fishing boat, a trailer for camping, or the like. In Figures 1 to 6 , the description will be made in a state in which the trailer hitch TH is not installed in the vehicle Ve.

[0060] The vehicle Ve is provided with a vehicle rear structure 10 that constitutes a rear half of the vehicle Ve. Specifically, the vehicle rear structure 10 is provided with left and right rear side frames (a pair of rear side frames) 11, 12, a rear floor cross member 13 provided at a rear portion of the vehicle body, a rear seat 14 provided at a front portion of the vehicle body of the rear floor cross member 13, a rear floor pan 15 provided at a rear portion of the vehicle body of the rear floor cross member 13, a spare tire carrier 16 provided at an upper surface of the rear floor pan 15 (see also Figure 3 ), a spare tire 17 provided at a front portion of the vehicle body of the rear floor pan 15, a reinforcing member 18 and a floor cross member (rear cross member) 22 provided at a lower surface of the rear floor pan 15 (see also Figure 5 ), and a tow hook (hook) 21 provided at the reinforcing member 18.

[0061] The left rear side frame 11 and the right rear side frame 12 are provided at the rear portion of the vehicle body at the outside in the vehicle width direction (i.e., the left and right outer sides). The left rear side frame 11 and the right rear side frame 12 are, for example, high-rigidity skeletal members that constitute a part of the vehicle body frame by being formed into a closed cross section that is hollow.

[0062] The left rear side frame 11 extends toward the rear portion of the vehicle body from a rear end portion of a left lower side beam that is not shown. The right rear side frame 12 extends toward the rear portion of the vehicle body from a rear end portion of a right lower side beam that is not shown.

[0063] The rear floor cross member 13 is provided at front end portions 11a of the left rear side frame 11 and 12a of the right rear side frame 12. The rear floor cross member 13 is a high-rigidity skeletal member that extends in the vehicle width direction and constitutes a part of the vehicle body frame.

[0064] The rear seat 14 is provided at the front portion of the vehicle body of the rear floor cross member 13 and between the left lower side beam and the right lower side beam. The rear seat 14 is provided with a seat cushion 25, a seat back 26, and a headrest that is not shown.

[0065] The seat cushion 25 is a seat portion that is provided between the left lower side beam and the right lower side beam and on which an occupant is seated. The seat back 26 is a backrest portion that is erected from a rear portion of the seat cushion 25 and supports a back of an occupant seated on the seat cushion 25. The headrest is a headrest portion that is provided at an upper portion of the seat back 26 and supports a head of an occupant seated on the seat cushion 25.

[0066] <rear floor pan>

[0067] Figure 3 is a perspective view when the vehicle rear structure 10 in the embodiment is viewed from the upper left. Figure 4 is a cross-sectional view taken along the IV-IV line of Figure 3 .

[0068] AsFigure 3 、 Figure 4 The front end portion 15a of the rear floor cross member 13 is connected to the rear floor cross member 13. The left side portion 15b (see FIG. 6) of the rear chassis 15 is connected to the left rear side frame 11. The right side portion 15c of the rear chassis 15 is connected to the right rear side frame 12. Figure 5

[0069] That is, the rear chassis 15 is provided between the left rear side frame 11 and the right rear side frame 12 in the vehicle width direction.

[0070] The rear chassis 15 has a chassis front half portion 31, a chassis rear half portion 32 disposed at a position further rearward in the vehicle body than the chassis front half portion 31, and a chassis ridge portion (ridge portion) 33 formed at a connecting portion between the chassis front half portion 31 and the chassis rear half portion 32.

[0071] The front end portion of the chassis front half portion 31 (i.e., the front end portion 15a of the rear chassis 15) is connected to the rear floor cross member 13. The left and right side portions of the chassis front half portion 31 are connected to the front half of the left rear side frame 11 and the front half of the right rear side frame 12. The chassis front half portion 31 extends slowly downward, for example, from the front end portion 15a of the rear chassis 15 as it tends toward the rear of the vehicle.

[0072] The spare tire 17 is disposed above the chassis front half portion 31. Thus, the spare tire 17 is disposed slowly downward, for example, in the rear chassis 15 (specifically, the chassis front half portion 31) as it tends toward the rear of the vehicle (see also FIG. 6). Figure 2

[0073] The chassis rear half portion 32 has a left side portion 35 (see FIG. 6) and a right side portion 36 disposed left and right, respectively, and a central portion 37 that links these left and right side portions 35 and 36. Figure 5 The left side portion 35 is suspended downward from the left rear side frame 11. The right side portion 36 is suspended downward from the right rear side frame 12. The central portion 37 links the lower edge of the left side portion 35 and the lower edge of the right side portion 36. The central portion 37 extends sharply downward from the rear end portion of the chassis front half portion 31 as it tends toward the rear of the vehicle, as compared with the chassis front half portion 31. Specifically, the central portion 37 extends downward in a slow curved shape in a manner that protrudes downward.

[0074] Thus, the chassis ridge portion 33 is formed at a portion where the front end portion of the central portion 37 intersects with the rear end portion of the chassis front half portion 31. The chassis ridge portion 33 protrudes in an inverted V shape toward the upper side and extends toward the vehicle width direction.

[0075]

[0076] ​​​In addition, the rear end 32a of the rear half of the chassis 32 is formed into a U-shape when viewed from the rear of the vehicle via the left side 35, the right side 36 and the central part 37.

[0077] A rear panel member 41 is provided at the rear end 32a of the rear half of the chassis 32, the rear end of the left rear side frame 11, and the rear end of the right rear side frame 12. A rear bumper beam 43 is provided on the rear panel member 41 from the rear of the vehicle (see reference). Figure 1 ).

[0078] like Figure 1 As shown, the rear bumper beam 43 is positioned in the direction of vehicle width. The left end 43a of the rear bumper beam 43 is connected to the rear end of the left rear side frame 11, and the right end 43b of the rear bumper beam 43 is connected to the rear end of the right rear side frame 12. That is, the rear bumper beam 43 is mounted on the rear ends of the left rear side frame 11 and the right rear side frame 12.

[0079] <Spare tire holder, spare tire>

[0080] return Figure 3 , Figure 4 A spare tire carrier 16 is provided on the upper surface of the rear chassis 15 from above. The spare tire carrier 16 is positioned in the center of the rear chassis 15 in the vehicle width direction. The spare tire carrier 16 extends from the front half 31 of the chassis, through the chassis ridge 33, to the middle of the rear half 32 of the chassis. The outer periphery of the spare tire carrier 16 is connected to the upper surface of the spare tire carrier 16.

[0081] The spare tire carrier 16 has a raised portion 45, a first rear extension 46, a first bendable portion 47, and a second rear extension 48 extending from the front of the vehicle toward the rear. The raised portion 45 is located in the front half of the chassis 31 near the chassis ridge 33, and has a top 45a formed into a trapezoidal shape when viewed from the side.

[0082] The top 45a, for example, forms a gradual downward slope towards the rear of the vehicle, similar to the front half of the chassis 31. The cross-section of the raised portion 45 in the vehicle width direction is shaped like a top hat.

[0083] A spare tire fixing part 51 is provided at the top 45a. The spare tire fixing part 51 is configured to install a fixing tool 53. By installing the fixing tool 53 on the spare tire fixing part 51, the center portion 17a of the spare tire 17 is fixed by the tool 53 (see also...). Figure 1 It is fixed to the raised part 45.

[0084] In this state, the spare tire 17 is slowly positioned downwards on the rear chassis 15 (specifically, the front half of the chassis 31) as it moves toward the rear of the vehicle.

[0085] The first rear extension portion 46 is formed integrally at a rear end of the raised portion 45 and is provided to the front half portion 31 of the bed. The first rear extension portion 46 extends from the rear end of the raised portion 45 to the bed ridge portion 33.

[0086] The second rear extension portion 48 is formed integrally at a rear end of the first rear extension portion 46 and is provided to the rear half portion 32 of the bed. The second rear extension portion 48 extends sharply downward compared to the first rear extension portion 46 as it tends toward the rear of the vehicle along the rear half portion 32 of the bed from the rear end of the first rear extension portion 46.

[0087] Therefore, the first bendable portion 47 is formed at a portion where the front end of the second rear extension portion 48 intersects with the rear end of the first rear extension portion 46. The first bendable portion 47 projects in an inverted V shape toward the upper side along the upper surface of the bed ridge portion 33. The first bendable portion 47 is provided to the bed ridge portion 33. In addition, the first bendable portion 47 is provided to a position further toward the rear of the vehicle than the spare tire fixing portion 51.

[0088] The first bendable portion 47 is, for example, a weak portion formed by a pair of notches 55 (only the notch 55 on the left side is illustrated) provided to both side portions. The first bendable portion 47 can be formed by a breakage portion, a recessed portion, a hole portion, a thin-walled portion, or the like in addition to the notches 55. In this way, by making the first bendable portion 47 a weak portion, the first bendable portion 47 can be formed in a simple shape and at a suppressed cost by the notches 55, the breakage portion, the recessed portion, the hole portion, the thin-walled portion, or the like.

[0089] Here, a portion of the spare tire carrier 16 on the vehicle front side with respect to the spare tire fixing portion 51 is described as a carrier front portion 57, and a portion of the spare tire carrier 16 on the vehicle rear side with respect to the spare tire fixing portion 51 is described as a carrier rear portion 58. The carrier front portion 57 is formed by the front half portion of the raised portion 45. The carrier rear portion 58 is formed by the rear half portion of the raised portion 45, the first rear extension portion 46, the first bendable portion 47, and the second rear extension portion 48. The carrier rear portion 58 is formed longer toward the rear of the vehicle than the carrier front portion 57.

[0090] That is, the spare tire carrier 16 is formed longer toward the rear of the vehicle than toward the front of the vehicle with respect to the spare tire fixing portion 51.

[0091] <Strengthening member>

[0092] Figure 5 is a perspective view of the vehicle rear structure 10 in the embodiment as viewed from the lower left.

[0093] As Figure 4 , Figure 5As shown, a reinforcing member 18 is provided on the lower surface of the rear floor panel 15 from below. The reinforcing member 18 is disposed in the center in the vehicle width direction of the rear floor panel 15. In addition, the reinforcing member 18 extends from the midway of the floor panel front half 31 to the rear end portion 32a of the floor panel rear half 32 in the front-rear direction through the floor panel ridge line portion 33.

[0094] The connecting portion (flange) of the outer periphery of the reinforcing member 18 is connected to the lower surface of the spare tire carrier 16. The vehicle width direction cross section of the reinforcing member 18 is formed in a top hat shape.

[0095] The reinforcing member 18 has a first inclined reinforcing portion 61, a second inclined reinforcing portion (inclined portion) 63 disposed at the rear end of the first inclined reinforcing portion 61, a second easy bending portion 62 formed at the portion where the front end of the second inclined reinforcing portion 63 intersects with the rear end of the first inclined reinforcing portion 61, a third easy bending portion 64 provided at the second inclined reinforcing portion 63, and a vertical reinforcing portion 65 provided at the rear end portion 63a of the second inclined reinforcing portion 63.

[0096] The first inclined reinforcing portion 61 is provided from below on the lower surface of the portion in the floor panel front half 31 that is close to the floor panel ridge line portion 33. The first inclined reinforcing portion 61 extends slowly downward along the raised portion 45 and the first rear extension portion 46 in the spare tire carrier 16 as it trends toward the rear of the vehicle.

[0097] The second inclined reinforcing portion 63 is integrally formed at the rear end of the first inclined reinforcing portion 61 and is provided from below on the lower surface of the floor panel rear half 32. The second inclined reinforcing portion 63 extends sharply downward as compared with the first inclined reinforcing portion 61 from the rear end of the first inclined reinforcing portion 61 to the rear end portion 32a of the floor panel rear half 32 as it trends toward the rear of the vehicle.

[0098] That is, the second inclined reinforcing portion 63 extends upward from the rear end portion 32a of the floor panel rear half 32 as it trends toward the front of the vehicle. In detail, the second inclined reinforcing portion 63 extends upward from the rear end portion 32a of the floor panel rear half 32 as it trends toward the front of the vehicle in a slow curved shape in a manner that protrudes downward.

[0099] The second easy bending portion 62 protrudes in an inverted V shape toward the upper side along the lower surface of the floor panel ridge line portion 33. The second easy bending portion 62 is provided at the floor panel ridge line portion 33 similarly to the first easy bending portion 47. In addition, the second easy bending portion 62 is provided at a position that is further toward the rear of the vehicle than the spare tire fixing portion 51 similarly to the first easy bending portion 47.

[0100] The second bendable portion 62 is, for example, a fragile portion formed by a recessed portion 67 provided in the bottom portion 18a formed in a hat-shaped cross section. The second bendable portion 62 can be formed by a breakage portion, a notch, a hole portion, a thin-walled portion, or the like, in addition to the recessed portion 67. In this way, by making the second bendable portion 62 a fragile portion, the second bendable portion 62 can be formed in a simple shape and at a reduced cost by the recessed portion 67, the breakage portion, the notch, the hole portion, the thin-walled portion, or the like.

[0101] Figure 6 is an enlarged sectional view of the VI portion of Figure 4 .

[0102] As shown in Figure 4 , Figure 6 , the second bendable portion 62 is disposed below the first bendable portion 47 formed in the spare tire carrier 16. Specifically, the first bendable portion 47 and the second bendable portion 62 are disposed at the same position in the vehicle front-rear direction.

[0103] In addition, the first bendable portion 47 is disposed on a first circular arc (circular arc) 71. The second bendable portion 62 is disposed on a second circular arc (circular arc) 72. The first circular arc 71 and the second circular arc 72 are circular arcs of the same center O1. The first bendable portion 47 and the second bendable portion 62 are disposed on the same normal line 73 on the first circular arc 71 and the second circular arc 72.

[0104] That is, the first bendable portion 47 and the second bendable portion 62 are disposed on the first circular arc 71 and the second circular arc 72 of the same center O1 and on the same normal line 73.

[0105] A third bendable portion 64 is provided in the second inclined reinforcing portion 63, for example, in the center in the vehicle front-rear direction. The third bendable portion 64 is provided at a position further to the rear of the vehicle than the second bendable portion 62. The third bendable portion 64 is, for example, a fragile portion formed by a recessed portion 68 provided in the bottom portion 18a formed in a hat-shaped cross section, similarly to the second bendable portion 62.

[0106] The third bendable portion 64 can be formed by a breakage portion, a notch, a hole portion, a thin-walled portion, or the like, in addition to the recessed portion 68. In this way, by making the third bendable portion 64 a fragile portion, the third bendable portion 64 can be formed in a simple shape and at a reduced cost by the recessed portion 68, the breakage portion, the notch, the hole portion, the thin-walled portion, or the like.

[0107] A plumb reinforcing portion 65 is erected upward from a rear end portion 63a of the second inclined reinforcing portion 63. The plumb reinforcing portion 65 is connected to a rear surface of the rear panel member 41 from the rear of the vehicle.

[0108] ​

[0109] A tow hook 21 is provided at the rear portion 18b of the reinforcing member 18. The tow hook 21 is generally U-shaped when viewed from the side. The front end portion 21a of the tow hook 21 is connected from below to the rear end portion 63a of the second inclined reinforcing member 63, and is located further rearward than the third bendable portion 64. Furthermore, the rear end portion 21b of the tow hook 21 is connected from the rear of the vehicle to the vertical reinforcing member 65. Therefore, the tow hook 21 is provided at the rear of the reinforcing member 18 and is provided at the rear portion 15d of the rear chassis 15 via the rear portion 18b of the reinforcing member 18.

[0110] By setting the traction hook 21 at the rear part 18b of the reinforcing member 18, the rear part 18b of the reinforcing member 18 is reinforced by the traction hook 21, and the rigidity of the rear part 18b of the reinforcing member 18 is further improved.

[0111] That is, the second inclined reinforcement 63 extends upward from the tow hook 21 as it moves toward the front of the vehicle, and has a third bendable portion 64 at a position closer to the front of the vehicle than the tow hook 21.

[0112] The tow hook 21 is used when towing a vehicle, for example, by attaching a rope to the tow hook 21. In addition, the tow hook 21 is used as a jacking point when lifting a vehicle.

[0113] <Chassis crossbeam>

[0114] like Figure 4 , Figure 5 As shown, a chassis crossbeam 22 is provided on the lower surface of the front half 31 of the rear chassis 15. The chassis crossbeam 22 is located in the front half 31 of the chassis near the chassis ridge 33. The chassis crossbeam 22 is mounted on the left rear side frame 11 and the right rear side frame 12 and extends in the vehicle width direction. The chassis crossbeam 22 is, for example, divided into a left crossbeam 81 and a right crossbeam 82.

[0115] The left crossbeam 81 extends from the connection point 61b of the front end 61a of the first inclined reinforcement 61 to the left rear side frame 11 along the lower surface of the front half of the chassis 31 in the vehicle width direction. The connection point 61b of the first inclined reinforcement 61 is located at the front of the vehicle relative to the second inclined reinforcement 63 (specifically, the second bendable portion 62). The left crossbeam 81 is a highly rigid member that is formed together with the front half of the chassis 31 into a hollow, closed cross section.

[0116] The right crossbeam 82 extends from the connection point 61b of the first inclined reinforcement 61 to the right rear side frame 12 along the lower surface of the front half of the chassis 31 toward the right in the vehicle width direction. The right crossbeam 82 is a rigid component that is formed together with the front half of the chassis 31 into a hollow closed section.

[0117] That is, the connecting portion 61b of the first inclined reinforcement portion 61 of the reinforcement member 18 is connected to the underbody cross member 22.

[0118] Note that, in the present embodiment, an example in which the connecting portion 61b of the first inclined reinforcement portion 61 of the underbody cross member 22 is connected to the front end portion 61a is described, but the present application is not limited to this. As another example, for example, the underbody cross member 22 can be connected to the front end portion 61a of the first inclined reinforcement portion 61. Thereby, it is possible to avoid the front end portion 61a of the first inclined reinforcement portion 61 from protruding toward the front of the vehicle from the underbody cross member 22.

[0119] Next, an example in which the spare tire 17 is appropriately controlled to protect the rear seat 14 from interference by the spare tire 17 in a case where an impact load is input to the vehicle rear structure 10 from the rear of the vehicle body due to a rear collision will be described, for example, based on Figures 4 to 8

[0120] First, an example in which the rear end portion of the vehicle Ve is not provided with a trailer hitch TH (see Figure 10 ) will be described, for example, based on Figure 7

[0121] Figure 7 is a cross-sectional view illustrating an example in which an impact load is input to the reinforcement member 18 of the vehicle rear structure 10 due to a rear collision. Figure 8 is a cross-sectional view illustrating an example in which the reinforcement member 18 is bent into a Z shape under the action of a load input to the reinforcement member 18. Figure 9 is a cross-sectional view illustrating an example in which the rear portion 17b of the spare tire 17 jumps upward under the action of a load input to the reinforcement member 18.

[0122] As shown in Figure 7 , the vehicle Ve is not provided with a trailer hitch TH (see Figure 10 ) at the rear end portion. Hereinafter, the vehicle Ve not provided with the trailer hitch TH will be referred to as "vehicle Vel".

[0123] According to the vehicle Vel, for example, at the time of a rear collision, an impact load Fl is input to the rear end portion 63a of the second inclined reinforcement portion 63 horizontally toward the front of the vehicle.

[0124] Therefore, a compression load F2 input to the rear end portion 63a of the second inclined reinforcement portion 63 upward toward the front of the vehicle is smaller than the impact load Fl. Thereby, it is considered that it is difficult to bend the second bendable portion 62 of the reinforcement member 18 by the compression load F2. Thus, a third bendable portion 64 is provided at a position of the reinforcement member 18 located rearward of the second bendable portion 62. Hereinafter, the compression load F2 will be simply referred to as "load F2".

[0125] As shown in Figure 8 ​​As shown, even with an upward load F2 input to the rear end 63a of the second inclined reinforcing section 63 (refer to...), Figure 7 In the case of a small bend, the second bendable portion 62 can be bent upwards by bending the third bendable portion 64 downwards. Thus, the reinforcing member 18 can be bent in a Z-shape at both the second bendable portion 62 and the third bendable portion 64.

[0126] In addition, by bending the reinforcing member 18 into a Z-shape under the load F2, the first bendable portion 47 and the second bendable portion 62 of the spare tire carrier 16 can be bent upward together.

[0127] Here, the first bendable portion 47 and the second bendable portion 62 are located further rearward than the spare tire mounting portion 51. Furthermore, the rear portion 58 of the spare tire carrier 16 is formed to be larger than the front portion 57 (refer to both sides). Figure 3 )long.

[0128] Therefore, it is possible to suppress the upward load F2 (refer to) input to the second inclined reinforcement 63. Figure 7 When the first bendable portion 47 and the second bendable portion 62 are bent upwards, the spare tire fixing portion 51 separates from the rear chassis 15. As a result, the rear side of the spare tire fixing portion 51 can be lifted upwards along with the rear chassis 15.

[0129] like Figure 9 As shown, with the spare tire 17 fixed to the spare tire mounting part 51, it is possible to prevent the spare tire 17 from separating from the rear chassis 15 and causing the rear part 17b of the spare tire 17 to jump upwards. Therefore, the behavior (movement) of the spare tire 17 can be appropriately controlled so that the spare tire 17 rotates towards the front of the vehicle as shown by arrow A, for example, preventing the spare tire 17 from contacting the rear seat 14 (see reference). Figure 2 (Contact). Therefore, it can improve the safety of vehicle Ve.

[0130] Here, the load F2 input to the reinforcing member 18 (refer to...) can be used to... Figure 7 The reinforcing member 18 is bent into a Z-shape at both the second bendable portion 62 and the third bendable portion 64. Furthermore, the reinforcing member 18 can be bent into a Z-shape, and the spare tire carrier 16 can be bent at the first bendable portion 47. Thus, the load F2 input to the reinforcing member 18 can be absorbed by the reinforcing member 18, the spare tire carrier 16, and the like.

[0131] In addition, such as Figure 6 , Figure 7As shown, the first and second easily bendable portions 47 and 62 are provided at the same position in the vehicle front-rear direction. Therefore, when the load F2 is input to the rear end portion 63a of the second inclined reinforcement portion 63, stress can be concentrated in the same position in the vehicle front-rear direction (i.e., the first and second easily bendable portions 47 and 62) in the spare tire carrier 16 and the reinforcement member 18.

[0132] Thus, the spare tire carrier 16 and the reinforcement member 18 can be reliably (appropriately) bent together with the rear floor panel 15 relative to the spare tire fixing portion 51 toward the rear of the vehicle. Therefore, the rear portion 17b of the spare tire 17 can be reliably (appropriately) jumped upward without the spare tire 17 being separated from the rear floor panel 15 (see also Figure 9 ). Thus, the safety of the vehicle Ve can be reliably improved.

[0133] Further, the first and second easily bendable portions 47 and 62 are disposed on the first and second circular arcs 71 and 72 of the same center O1 and on the same normal line 73. Therefore, when the load F2 is input to the rear end portion 63a of the second inclined reinforcement portion 63, stress can be concentrated in the first and second easily bendable portions 47 and 62 on the same normal line 73 in the spare tire carrier 16 and the reinforcement member 18.

[0134] Thus, the spare tire carrier 16 and the reinforcement member 18 can be reliably (appropriately) bent together with the rear floor panel 15 at a position further toward the rear of the vehicle than the spare tire fixing portion 51. Therefore, the rear portion 17b of the spare tire 17 can be reliably (appropriately) jumped upward without the spare tire 17 being separated from the rear floor panel 15.

[0135] Further, as shown in Figs. 1 and 2, the first and second easily bendable portions 47 and 62 are provided at the same position in the vehicle front-rear direction. Therefore, when the load F2 is input to the rear end portion 63a of the second inclined reinforcement portion 63, stress can be concentrated in the same position in the vehicle front-rear direction (i.e., the first and second easily bendable portions 47 and 62) in the spare tire carrier 16 and the reinforcement member 18. Figure 4 Figure 7 Thus, the spare tire carrier 16 and the reinforcement member 18 can be reliably (appropriately) bent together with the rear floor panel 15 relative to the spare tire fixing portion 51 toward the rear of the vehicle. Therefore, the rear portion 17b of the spare tire 17 can be reliably (appropriately) jumped upward without the spare tire 17 being separated from the rear floor panel 15 (see also

[0136] Thus, the spare tire carrier 16 and the reinforcement member 18 can be reliably (appropriately) bent together with the rear floor panel 15 relative to the spare tire fixing portion 51 toward the rear of the vehicle. Therefore, the rear portion 17b of the spare tire 17 can be reliably (appropriately) jumped upward without the spare tire 17 being separated from the rear floor panel 15 (see also

[0137] Further, as shown in Figs. 1 and 2, the first and second easily bendable portions 47 and 62 are provided at the same position in the vehicle front-rear direction. Therefore, when the load F2 is input to the rear end portion 63a of the second inclined reinforcement portion 63, stress can be concentrated in the same position in the vehicle front-rear direction (i.e., the first and second easily bendable portions 47 and 62) in the spare tire carrier 16 and the reinforcement member 18. Figure 5 Figure 7 ​​As shown, the connecting portion 61b of the first inclined reinforcing section 61 of the reinforcing member 18, on the vehicle-front side relative to the second bendable portion 62, is connected to the chassis crossbeam 22. Therefore, the connecting portion 61b of the first inclined reinforcing section 61 is reinforced by the chassis crossbeam 22. Thus, the reinforcing member 18 can appropriately ensure the reaction force supporting the load F2 input to the rear end 63a of the second inclined reinforcing section 63, and support the reinforcing member 18 between the tow hook 21 (i.e., the rear end 63a of the second inclined reinforcing section 63) and the chassis crossbeam 22.

[0138] In this state, the load F2 can exceed the reaction force, causing the spare tire carrier 16 to reliably bend at the first bendable portion 47, and the reinforcing member 18 to reliably bend at the second bendable portions 62 and the third bendable portions 64. Furthermore, the rear chassis 15 can reliably bend at the chassis ridge portion 33. Thus, the rear portion 17b of the spare tire 17 can reliably bounce upwards without separating from the rear chassis 15.

[0139] Next, based on Figure 8 To illustrate that a trailer hitch TH is installed at the rear end of vehicle Ve (see reference). Figure 10 Examples of ).

[0140] Figure 10 This is a cross-sectional view illustrating an example of an impact load being applied to the trailer hitch TH of the rear structure 10 of a vehicle due to a rear-end collision. Figure 11 This is a cross-sectional view illustrating an example of how the reinforcing member 18 bends in a Z-shape under the load applied to the trailer hook TH. Figure 12 This is a cross-sectional view illustrating an example of how the rear part 17b of the spare tire 17 bounces upward under the load input to the trailer hitch TH.

[0141] like Figure 10 As shown, vehicle Ve is equipped with a trailer hitch TH at the rear end. Hereinafter, vehicle Ve equipped with trailer hitch TH will sometimes be referred to as "vehicle Ve2".

[0142] According to vehicle Ve2, in a rear-end collision, the impact load F3 is input as a compressive load via the trailer hitch mounting portion 85 toward the front of the vehicle and upward toward the rear end 63a of the second inclined reinforcement portion 63. Hereinafter, the impact load F3 will sometimes be simply referred to as "load F3".

[0143] like Figure 11 As shown, the load F3 (refer to) input to the rear end 63a of the second inclined reinforcement 63 Figure 10 This allows the second bendable portion 62 to bend upwards. Consequently, the reinforcing member 18 can be bent at the second bendable portion 62 in a V-shape.

[0144] In addition, by causing the reinforcement member 18 to be bent in a V shape under the action of the load F3, the first bendable portion 47 of the spare tire carrier 16 can be bent upward together with the second bendable portion 62.

[0145] Here, the first bendable portion 47 and the second bendable portion 62 are provided at positions further to the rear of the vehicle than the spare tire fixing portion 51. In addition, the carrier rear portion 58 of the spare tire carrier 16 is formed longer than the carrier front portion 57 (both, refer to Figure 3 ).

[0146] Therefore, it is possible to suppress a situation in which the spare tire fixing portion 51 is separated from the rear chassis 15 when the first bendable portion 47 and the second bendable portion 62 are bent upward under the action of the upward load F3 (refer to Figure 10 ) input to the second tilt reinforcement portion 63. Thus, it is possible to cause the rear side of the spare tire fixing portion 51 to jump upward together with the rear chassis 15.

[0147] As shown in Figure 12 , in a state in which the spare tire 17 is fixed to the spare tire fixing portion 51, it is possible to cause the rear portion 17b of the spare tire 17 to jump upward without separating the spare tire 17 from the rear chassis 15. Thus, it is possible to appropriately control the behavior (movement) of the spare tire 17 to cause the spare tire 17 to rotate toward the front of the vehicle as indicated by the arrow B, for example, and it is possible to prevent the spare tire 17 from contacting the rear seat 14 (refer to Figure 2 ).

[0148] By the load F3 (refer to Figure 10 ) input to the reinforcement member 18, it is possible to bend the reinforcement member 18 in a V shape at the second bendable portion 62. In addition, it is possible to cause the reinforcement member 18 to be bent in a V shape and to cause the spare tire carrier 16 to be bent at the first bendable portion 47. Thus, it is possible to absorb the load F3 input to the reinforcement member 18 by the reinforcement member 18, the spare tire carrier 16, and the like.

[0149] In addition, according to the vehicle Ve2 provided with the trailer hitch TH, the same action and effect as the vehicle Ve1 not provided with the trailer hitch TH can be obtained.

[0150] [Modified Example]

[0151] Next, the vehicle rear structure 100 of the modified example will be described based on Figure 13 . In the vehicle rear structure 100 of the modified example, the same structure members as those of the vehicle rear structure 10 of the above-described embodiment are denoted by the same reference numerals and will not be described.

[0152] Figure 13is a cross-sectional view of a vehicle rear structure 100 that is a modification of the vehicle rear structure 100.

[0153] As shown in Figure 13 The vehicle rear structure 100 replaces the spare tire carrier 16 and the reinforcing member 18 of the embodiment with a spare tire carrier 102 and a reinforcing member 103, and is otherwise the same as the vehicle rear structure 10 of the embodiment.

[0154] The spare tire carrier 102 replaces the first bendable portion 47 of the embodiment with a first bendable portion 105, and is otherwise the same as the spare tire carrier 16 of the embodiment. The first bendable portion 105 is, like the first bendable portion 47 of the first embodiment, for example, a weak portion formed by a notch, a broken portion, a recessed portion, a hole portion, a thin-walled portion, or the like.

[0155] The reinforcing member 103 replaces the second bendable portion 62 of the embodiment with a second bendable portion 106, and is otherwise the same as the reinforcing member 18 of the embodiment. The second bendable portion 106 is, like the second bendable portion 62 of the first embodiment, for example, a weak portion formed by a recessed portion, a broken portion, a notch, a hole portion, a thin-walled portion, or the like.

[0156] The first bendable portion 105 and the second bendable portion 106 are provided at positions that are offset in the vehicle front-rear direction. Therefore, when an upward load F4 is input to the second oblique reinforcing portion 63 of the reinforcing member 103 toward the vehicle front, it is possible to disperse the place where stress is concentrated in the vehicle front-rear direction to the spare tire carrier 102 and the reinforcing member 103. Thus, it is possible to appropriately ensure rigidity of the entire spare tire carrier 102, reinforcing member 103, and rear floor 15. That is, it is possible to appropriately ensure a reaction force that supports the upward load F4 input to the second oblique reinforcing portion 63 of the reinforcing member 103.

[0157] In this state, by the load F4 exceeding the reaction force, it is possible to bend the spare tire carrier 102 at the first bendable portion 105 and bend the reinforcing member 103 at the second bendable portion 106. Thus, it is possible to absorb the load F4 input to the second oblique reinforcing portion 63 of the reinforcing member 103 by the spare tire carrier 102, the reinforcing member 103, and the rear floor 15.

[0158] On the other hand, the spare tire carrier 102 is bent at the first bendable portion 105. Thus, it is possible to bend the reinforcing member 103 at the second bendable portion 106. Therefore, it is possible to reliably (appropriately) bend the spare tire carrier 102 and the reinforcing member 103 together with the rear floor 15 at a position that is further to the vehicle rear than the spare tire fixing portion 51.

[0159] Thus, it is possible to prevent the spare tire 17 (see FIG. 1) from being damaged by the load F4 input to the second oblique reinforcing portion 63 of the reinforcing member 103. Figure 2) from the rear floor 15 to make the rear portion 17b of the spare tire 17 (refer to Figure 2 ) reliably (appropriately) jump upward.

[0160] Further, the first easily bendable portion 105 is arranged on the first circular arc (circular arc) 111. The second easily bendable portion 106 is arranged on the second circular arc (circular arc) 112. The first circular arc 111 and the second circular arc 112 are circular arcs of the same center O2. Here, the first easily bendable portion 105 is arranged on the first normal line (normal line) 114. The second easily bendable portion 106 is arranged on the second normal line (normal line) 115.

[0161] That is, the first easily bendable portion 105 and the second easily bendable portion 106 are arranged on the offset normal lines on the circular arcs of the same center O2.

[0162] Therefore, when the upward load F4 is input to the second oblique reinforcement portion 63 of the reinforcement member 103 toward the front of the vehicle, it is possible to disperse the place where stress is concentrated in the vehicle front-rear direction to the spare tire carrier 102 and the reinforcement member 103. Thus, it is possible to appropriately ensure rigidity of the entire spare tire carrier 102, the reinforcement member 103, and the rear floor 15. That is, it is possible to appropriately ensure the reaction force that supports the upward load F4 input to the second oblique reinforcement portion 63 of the reinforcement member 103.

[0163] In this state, the spare tire carrier 102 is bent at the first easily bendable portion 105 by the load F4 exceeding the reaction force. Thus, it is possible to bend the reinforcement member 103 at the second easily bendable portion 106. Therefore, it is possible to absorb the load F4 input to the second oblique reinforcement portion 63 of the reinforcement member 103 by the spare tire carrier 102, the reinforcement member 103, and the rear floor 15.

[0164] On the other hand, it is possible to bend the spare tire carrier 102 at the first easily bendable portion 105 and bend the reinforcement member 103 at the second easily bendable portion 106. Therefore, it is possible to reliably (appropriately) bend the spare tire carrier 102 and the reinforcement member 103 together with the rear floor 15 at a position that is rearward of the spare tire fixing portion 51 of the vehicle. Thus, it is possible to prevent the spare tire 17 (refer to Figure 2 ) from being separated from the rear floor 15 to make the rear portion 17b of the spare tire 17 (refer to Figure 2 ) reliably (appropriately) jump upward.

[0165] Note that the technical scope of the present application is not limited to the described embodiments, and various changes can be made without departing from the spirit of the present application.

[0166] In addition, the components of the embodiments can be appropriately substituted with well-known components without departing from the spirit of the present application, and the modifications can be appropriately combined.

Claims

1. A vehicle rear structure characterized by comprising: a rear floor; a spare tire carrier provided on an upper surface of the rear floor and formed longer in a vehicle rearward direction from a spare tire fixing portion of the spare tire carrier than in a vehicle forward direction from the spare tire fixing portion; a spare tire fixed to the spare tire fixing portion; a reinforcing member provided on a lower surface of the rear floor and having an inclined portion extending upward from a rear portion of the rear floor toward the vehicle forward direction; and a hook provided on a rear portion of the reinforcing member, wherein the spare tire carrier has a first bendable portion provided at a position in the vehicle rearward direction from the spare tire fixing portion at which the spare tire is fixed, the reinforcing member has a second bendable portion provided at a position in the vehicle rearward direction from the spare tire fixing portion, and the first bendable portion and the second bendable portion are provided at the same position in a vehicle longitudinal direction.

2. The vehicle rear structure according to claim 1, characterized in that the first bendable portion and the second bendable portion are arranged on the same center circular arc and on the same normal line.

3. A vehicle rear structure characterized by comprising: a rear floor; a spare tire carrier provided on an upper surface of the rear floor and formed longer in a vehicle rearward direction from a spare tire fixing portion of the spare tire carrier than in a vehicle forward direction from the spare tire fixing portion; a spare tire fixed to the spare tire fixing portion; a reinforcing member provided on a lower surface of the rear floor and having an inclined portion extending upward from a rear portion of the rear floor toward the vehicle forward direction; and a hook provided on a rear portion of the reinforcing member, wherein the spare tire carrier has a first bendable portion provided at a position in the vehicle rearward direction from the spare tire fixing portion at which the spare tire is fixed, the reinforcing member has a second bendable portion provided at a position in the vehicle rearward direction from the spare tire fixing portion, and the first bendable portion and the second bendable portion are provided at positions staggered in a vehicle longitudinal direction and are arranged on the same center circular arc and on the staggered normal lines.

4. The vehicle rear structure according to any one of claims 1 to 3, characterized in that the first bendable portion and the second bendable portion are fragile portions.

5. The vehicle rear structure according to any one of claims 1 to 3, characterized in that the first bendable portion and the second bendable portion are provided at ridge line portions extending in a vehicle width direction in the rear floor.

6. The vehicle rear structure according to any one of claims 1 to 3, characterized by comprising: a pair of rear side frames extending in a vehicle longitudinal direction in a state of being provided on vehicle width direction outer sides of the rear floor; and a rear cross member extending in a vehicle width direction by being supported on the pair of rear side frames and provided on a lower surface of the rear floor. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ A portion of the reinforcement member on the vehicle front side with respect to the inclined portion is connected to the rear cross beam.

7. The vehicle rear structure according to any one of claims 1 to 3, characterized by The reinforcement member has a third pliable portion formed by a fragile portion provided at a position further to the rear of the vehicle than the second pliable portion.

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