Vehicle structure

Abstract

A vehicle structure that can reduce the weight of a vehicle while increasing its strength against a collision load is provided. [Solution] A pair of left and right wheel houses 12R, 12L and a floor panel 11 connecting these wheel houses 12R, 12L are die-cast in a structure 10. Each wheel house 12R, 12L has a concave portion 23 that faces outward in the vehicle width direction and is made of a concave curved surface that is curved into an approximately spherical shape, and the concave portion 23 has a horizontal rib 40 that extends along a horizontal plane and stands outward in the vehicle width direction.

Description

[Technical Field]

[0001] The present invention relates to a vehicle structure in which a wheel house is formed by casting. [Background technology]

[0002] In recent years, research and development has been conducted into lightweighting, which contributes to energy efficiency, in order to ensure that more people have access to affordable, reliable, sustainable and advanced energy. For example, in vehicles, there is a demand for increased strength to protect occupants in the event of a collision, and there is also a demand for lighter weight to improve fuel economy and electricity efficiency. In this context, Patent Document 1 proposes a technology for integrally forming a pair of wheel houses on the left and right sides of the rear of a vehicle, a horizontal beam connecting these wheel houses, and a vertical beam extending in the fore-and-aft direction by die casting. When the vehicle is hit from behind, the collision load is transmitted to the longitudinal beams and the transverse beams. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Chinese Patent Application Publication No. 117360634 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the configuration proposed in Patent Document 1, the load transmission path is configured in the same way as in conventional vehicle structures, so there is still room for improvement in terms of weight reduction.

[0005] The present invention has been made in view of the above-mentioned points, and has an object to provide a vehicle structure that can reduce the vehicle weight while increasing the strength against a collision load, thereby contributing to energy efficiency. [Means for solving the problem]

[0006] In order to achieve the above object, a vehicle structure according to the present invention comprises a structure in which a pair of wheel houses arranged spaced apart on the left and right and a floor panel connecting the pair of wheel houses are integrally formed by die-cast molding, the floor panel having a frame connection portion to which an interior end of a frame extending along the vehicle longitudinal direction is connected, and each wheel house has a shell shape having a concave surface portion which faces outward in the vehicle width direction and is made of a concave surface that is curved in a substantially spherical shape, and a convex surface portion which is formed on the back surface of the concave surface portion and protrudes inward in the vehicle width direction and is made of a convex surface that is curved in a substantially spherical shape, the concave surface portion being disposed to face outward in the vehicle width direction and a part of a wheel being housed within the concave surface portion, and the concave surface portion having a horizontal rib extending along a horizontal plane and erected outward in the vehicle width direction It is characterized by: [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a vehicle structure that can reduce the weight of the vehicle while increasing the strength against a collision load, which in turn can contribute to energy efficiency. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing a structure that constitutes a vehicle structure of the present embodiment. [Figure 2] FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] 1 is a side view of a structural body that constitutes the vehicle structure of the present embodiment, as viewed from the left side of the vehicle. [Figure 5] 1 is a side view, seen from the left side, showing a state in which a vehicle power source and a suspension are assembled to a structural body that constitutes the vehicle structure of this embodiment. FIG. [Figure 6] 1 is a perspective view of a structural body that constitutes a vehicle structure according to an embodiment of the present invention, viewed from below on the left side of the vehicle. [Figure 7] 1 is a perspective view of a left rear wheel house, which is a structural body that constitutes the vehicle structure of the present embodiment, viewed from above on the right side of the vehicle. FIG. [Figure 8] 1 is a side view seen from the left side of a vehicle, showing a state in which a structure that constitutes the vehicle structure of this embodiment is assembled to the vehicle. FIG. [Figure 9] 1 is a side view seen from inside the vehicle, showing a vehicle to which a structural body constituting the vehicle structure of the present embodiment is assembled. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] A vehicle structure S according to one embodiment of the present invention will be described in detail with reference to FIGS. In the description, the same elements are given the same reference numerals and redundant description will be omitted.

[0010] The vehicle structure S of this embodiment includes a structural body 10 that constitutes the rear portion of a vehicle body V1 (see FIGS. 1, 2, 8, and 9). Therefore, hereinafter, the inside of the vehicle in the longitudinal direction of the vehicle refers to the front of the vehicle, and the outside of the vehicle in the longitudinal direction of the vehicle refers to the rear of the vehicle. The structure 10 is formed by die-casting an aluminum alloy (see FIGS. 1 and 2). The structure 10 includes a floor panel 11 (floor panel), a right rear wheel house 12R (wheel house 12), and a left rear wheel house 12L (wheel house 12).

[0011] The right rear wheel house 12R is disposed on the right side of the rear part of the vehicle body, and rotatably houses the right rear wheel (wheel V6) therein (see FIG. 5). The left rear wheel house 12L is disposed on the left side of the rear of the vehicle body, and rotatably houses the left rear wheel V6L (wheel V6). The right rear wheel house 12R and the left rear wheel house 12L are disposed at a predetermined distance in the vehicle width direction, but are integrally connected by a floor panel 11. That is, the structure 10 is formed by integrally forming the pair of wheel houses 12R, 12L and the floor panel 11 connecting them by die casting.

[0012] The right rear wheel house 12R and the left rear wheel house 12L are configured to be plane-symmetrical with respect to the center plane in the vehicle width direction. Therefore, in the following detailed description, only the left rear wheel house 12L will be described, and a description of the right rear wheel house 12R will be omitted.

[0013] The floor panel 11 is equipped with a vehicle power source V2 such as a motor and a reduction gear (see FIG. 5). Furthermore, the front end (the end on the vehicle interior side in the vehicle front-rear direction) of the rear frame V3 (frame) is connected to the floor panel 11 (see FIGS. 2 and 4). The rear frame V3 is a member for transmitting the collision load to the front of the vehicle body when the vehicle is hit from behind. A rear bumper (not shown) is provided at the rear end of the rear frame V3.

[0014] The left rear wheel house 12L (wheel house 12) includes a vehicle body connection portion 21 and a house main body 22. The vehicle body connection portion 21 is a component for fixing the left and right wheel houses 12R, 12L to a vehicle body panel V4 that constitutes the vehicle body V1. The vehicle body connection portion 21 is formed in a flange shape at a location of the house main body 22 that comes into contact with the inside panel V4a of the vehicle body V1. The vehicle body connection portion 21 is attached to the inside panel V4a at a plurality of joining points 21a by spot welding or other suitable technique (see FIGS. 8 and 9).

[0015] A quarter pillar stiffener V4b is provided on the outer surface of the inside panel V4a. The quarter pillar stiffener V4b is installed as a structural member to increase the strength of the rear edge of the rear seat entrance. Additionally, a side sill V5 is installed as a structural material to increase the strength of the lower edge of the rear seat entrance.

[0016] The house main body 22 has a shell shape of a roughly quarter sphere formed by a side portion 22a and a vehicle width portion 22b (see FIGS. 1 to 7). The side portion 22a is formed in a substantially semicircular plate shape and is disposed facing in the vehicle width direction.

[0017] The vehicle width portion 22b is formed of a strip-shaped member that protrudes outward in the vehicle width direction from the arc edge portion of the side portion 22a and curves along the arc portion of the side portion 22a. The vehicle width portion 22b is set so that an angle A22b formed by a tangent to the surface and a horizontal plane near the top in the vehicle vertical direction is 45° or less. Also, the angle may be set so that the tangent to the surface is not limited to the vicinity of the top, but is 45° or less with respect to the vehicle width direction.

[0018] The concave surface formed by the outer surfaces of the side portions 22a and the outer surfaces of the width portions 22b in the vehicle width direction and curved into a substantially spherical shape is referred to as a concave portion 23. The convex curved surface formed by the inner surface of the side portion 22a in the vehicle width direction and the inner surface of the width portion 22b in the vehicle width direction and curved into a substantially spherical shape is referred to as a convex surface portion 24. That is, the recessed surface of the house main body 22 on the outer side in the vehicle width direction is referred to as the recessed surface portion 23, and the surface of the house main body 22 protruding on the inner side in the vehicle width direction is referred to as the convex surface portion 24.

[0019] That is, the house main body 22 is formed into a shell shape of approximately a quarter sphere by the concave surface portion 23 and the convex surface portion 24. The house main body 22 is arranged on the vehicle body V1 with the concave portion 23 facing outward in the vehicle width direction, the convex portion 24 facing inward in the vehicle width direction, and the opening portion opening outward in the vehicle width direction and below the vehicle.

[0020] The concave surface portion 23 is provided with a damper fixing portion 25, an arm support portion 26, a spring holding portion 27, a first inclined rib 31, a second inclined rib 32, a third inclined rib 33, a first horizontal rib 41, a second horizontal rib 42, a third horizontal rib 43, a fourth horizontal rib 44, a fifth horizontal rib 45, a first damper fixing portion reinforcing rib 51, a second damper fixing portion reinforcing rib 52, and a branch rib 61 (see Figures 3 to 6). Furthermore, the convex portion 24 is provided with a pair of reinforcing ribs 71 (see FIG. 7).

[0021] The damper fixing portion 25 is a base that supports the upper end of the damper V7a that suspends the left rear wheel V6L (wheel V6) (see FIGS. 4 to 6). The damper fixing portion 25 is disposed in the uppermost portion of the concave surface portion 23 where the side portion 22a and the vehicle width portion 22b are connected. The damper fixing portion 25 is made up of a first damper fixing portion 25a and a second damper fixing portion 25b. The first damper fixing portion 25a and the second damper fixing portion 25b are positioned in front of the damper V7a and behind the damper V7a so as to sandwich the upper end portion of the damper V7a from the front and rear.

[0022] The arm support portion 26 is a base that supports the arm base V7b. The arm base V7b swingably supports the front end of a suspension arm V7c that suspends the left rear wheel V6L (wheel V6). The arm support portion 26 is formed integrally with a first horizontal rib 41, which will be described later.

[0023] The spring holding portion 27 is a seat that holds the upper end of the coil spring V7d that is sandwiched between the suspension arm V7c and the wheel house 12. The positions of the damper fixing portion 25, the arm support portion 26, and the spring holding portion 27 on the concave portion 23 are not limited to those in this embodiment, but can be changed as appropriate depending on the configuration and size of the suspension V7.

[0024] The first inclined rib 31 (inclined rib 30) is formed in a thin plate shape and stands outward in the vehicle width direction from the surface of the recessed portion 23 (see FIGS. 3 to 6). The first inclined rib 31 is positioned above the frame connection portion 11a and extends from below the rear of the vehicle (outside the vehicle in the longitudinal direction) to above the front of the vehicle (inside the vehicle in the longitudinal direction). The first inclined rib 31 is set so that the thickness T2 is constant at each portion in the extending direction. Furthermore, the first inclined rib 31 is positioned so that its rear end (the end on the outer side of the vehicle in the vehicle longitudinal direction) overlaps with the frame connection portion 11a of the concave surface portion 23 in the vehicle longitudinal direction. That is, the rear end portion (the end portion on the vehicle outer side) of the first inclined rib 31 is set at a position overlapping with the upper surface of the frame connection portion 11a in a side view of the vehicle.

[0025] The second inclined rib 32 (inclined rib 30) is formed in a thin plate shape and stands outward in the vehicle width direction from the surface of the recessed portion 23. The second inclined rib 32 is provided so as to extend from a lower side on the vehicle outer side toward an upper side on the vehicle inner side in the vehicle front-rear direction. The second inclined rib 32 is set so that the thickness T2 is constant at each portion in the extending direction. Furthermore, the rear end of the second inclined rib 32 is set in front of the rear frame V3 (inner side of the vehicle in the vehicle front-rear direction) on the axis of the rear frame V3 (frame).

[0026] The third inclined rib 33 is formed in a thin plate shape and stands outward in the vehicle width direction from the surface of the recessed portion 23. The third inclined rib 33 is provided so as to extend from a lower side on the vehicle outer side toward an upper side on the vehicle inner side in the vehicle front-rear direction. The third inclined rib 33 is set so that the thickness T2 is constant at each portion in the extending direction.

[0027] The third inclined rib 33 is positioned so that its rear end (the end on the outer side of the vehicle in the vehicle front-rear direction) overlaps with the front edge of the arm support portion . This allows the collision load input to the suspension arm V7c to be distributed more effectively. The third inclined rib 33 is provided so that its rear end is located forward of the rear end of the first inclined rib 31 and the rear end of the second inclined rib 32. Furthermore, the third inclined rib 33 is arranged so that its inclination angle (third inclination angle A33) relative to the horizontal plane is greater than the inclination angle of the first inclined rib 31 (first inclination angle A31) and the inclination angle of the second inclined rib 32 (second inclination angle A32).

[0028] The first horizontal rib 41 (horizontal rib 40) is provided so as to extend along the horizontal plane and in the front-rear direction of the vehicle (see FIGS. 3 to 6). Similarly to the inclined ribs 30, the first horizontal ribs 41 are formed in the shape of thin plates and stand outward in the vehicle width direction from the surface of the recessed portion 23. The first horizontal rib 41 is set so that the thickness T2 is constant at each portion in the extending direction. The first horizontal rib 41 is disposed so as to overlap the lower surface of the frame connection portion 11a in the vehicle up-down direction.

[0029] The first horizontal rib 41 is arranged such that its rear end (the end on the outer side of the vehicle in the vehicle longitudinal direction) is located rearward (outside of the vehicle) of the front end (inner side end) of the frame connection portion 11a. That is, the first horizontal rib 41 is formed so as to overlap the lower surface portion of the frame connection portion 11a in a side view of the vehicle.

[0030] The second horizontal rib 42 (horizontal rib 40) is provided so as to extend along the horizontal plane and in the front-rear direction of the vehicle. Similarly to the inclined ribs 30, the second horizontal ribs 42 are formed in the shape of thin plates and stand outward in the vehicle width direction from the surface of the recessed portion 23. The second horizontal rib 42 is set so that the thickness T2 is constant at each portion in the extending direction.

[0031] The second horizontal rib 42 is disposed so as to overlap the upper surface of the frame connection portion 11a in the vehicle up-down direction. The second horizontal rib 42 is arranged such that its rear end (the end on the outer side of the vehicle in the vehicle longitudinal direction) is located rearward (outside of the vehicle) of the front end (inner side end) of the frame connection portion 11a. That is, the second horizontal rib 42 is formed so as to overlap the upper surface portion of the frame connection portion 11a in a side view of the vehicle.

[0032] Furthermore, with regard to the protruding dimension T1 of the second horizontal rib 42 protruding outward in the vehicle width direction, the protruding dimension T1 of the portion located forward of the front end of the frame connection portion 11a is set to be larger than the protruding dimension T1 of the portion located rearward of the front end of the frame connection portion 11a (see Figure 6). Furthermore, the second horizontal rib 42 is arranged so as to intersect with the second inclined rib 32 and also with the first damper fixing portion reinforcing rib 51.

[0033] The third horizontal rib 43 (horizontal rib 40) is provided so as to extend along the horizontal plane and in the front-rear direction of the vehicle. Similarly to the inclined ribs 30, the third horizontal ribs 43 are formed in the shape of thin plates and stand outward in the vehicle width direction from the surface of the recessed portion 23. The third horizontal rib 43 is set so that the thickness T2 is constant at each portion in the extending direction. Additionally, the third horizontal rib 43 is disposed at a position overlapping with the first damper fixing portion 25a (damper fixing portion) and the second damper fixing portion 25b (damper fixing portion) in the vehicle up-down direction.

[0034] The third horizontal rib 43 is discontinued between the first damper fixing portion 25a and the second damper fixing portion 25b. This is because the third horizontal rib 43 is interrupted to prevent interference with the damper V7a when the upper end of the damper V7a is supported by the first damper fixing portion 25a and the second damper fixing portion 25b. Therefore, it is possible to arrange the third horizontal rib 43 between the first damper fixing portion 25a and the second damper fixing portion 25b as long as it does not interfere with the damper V7a.

[0035] The upper end of the damper V7a is fixed to the first damper fixing portion 25a and the second damper fixing portion 25b. Therefore, a load input from behind the second damper fixing portion 25b is transmitted to the first damper fixing portion 25a and the third horizontal rib 43 via the damper V7a.

[0036] The fourth horizontal rib 44 (horizontal rib 40) is provided so as to extend along the horizontal plane and in the front-rear direction of the vehicle. Similarly to the inclined ribs 30, the fourth horizontal ribs 44 are formed in the shape of thin plates and stand outward in the vehicle width direction from the surface of the recessed portion 23. The fourth horizontal rib 44 is set so that the thickness T2 is constant at each portion in the extending direction. In addition, the fourth horizontal rib 44 is positioned at an intermediate position between the third horizontal rib 43 and the second horizontal rib 42, and at a position where it intersects with the intersection point where the first inclined rib 31 and the first damper fixing portion reinforcement rib 51 described later intersect.

[0037] In the vehicle structure S of this embodiment, the horizontal rib 40 arranged between the third horizontal rib 43 and the second horizontal rib 42 is a single fourth horizontal rib 44, but this is not limited to this form. For example, if the diameter of the wheel V6 housed in the wheel house 12 is larger than that of the present embodiment, the number of fourth horizontal ribs 44 can be increased. Furthermore, if the diameter of the wheel V6 housed in the wheel house 12 is smaller than that of this embodiment, the fourth horizontal rib 44 can be eliminated.

[0038] The fifth horizontal rib 45 (horizontal rib 40) is provided so as to extend along the horizontal plane and in the front-rear direction of the vehicle. Similarly to the inclined ribs 30, the fifth horizontal rib 45 is formed in a thin plate shape and stands outward in the vehicle width direction from the surface of the recessed portion 23. The fifth horizontal rib 45 is set so that the thickness T2 is constant at each portion in the extending direction. The fifth horizontal rib 45 has its rear end positioned midway between the first horizontal rib 41 and the second horizontal rib 42 in the vehicle vertical direction, and at a position overlapping the spring receiving surface of the spring retaining portion 27.

[0039] That is, the fifth horizontal rib 45 is disposed in an intermediate position between the lower surface of the frame connection portion 11a and the upper surface of the frame connection portion 11a in the vehicle up-down direction, and in front of the frame connection portion 11a. In other words, the fifth horizontal rib 45 is positioned so that its rear end (the outer end in the vehicle's fore-and-aft direction) is located forward (inside the vehicle) of the front end (the inner end in the vehicle's fore-and-aft direction) of the frame connection portion 11a.

[0040] The first damper fixing portion reinforcing rib 51 (damper fixing portion reinforcing rib) is provided so as to intersect with the inclined rib 30 and extend downward from the first damper fixing portion 25a. Similarly to the inclined ribs 30, the first damper fixing portion reinforcing ribs 51 are formed in the shape of thin plates and stand outward in the vehicle width direction from the surface of the recessed portion 23 (see FIGS. 3 to 6). That is, the first damper fixing portion reinforcing rib 51, the first inclined rib 31, and the fourth horizontal rib 44 are arranged so as to intersect at one point in a side view of the vehicle. Furthermore, the first damper fixing portion reinforcing rib 51 is disposed so as to intersect with the second horizontal rib 42 and have its lower end connected to the branch rib 61 .

[0041] The second damper fixing portion reinforcing rib 52 (damper fixing portion reinforcing rib) is provided so as to extend downward from the second damper fixing portion 25b toward the frame connecting portion 11a. Similarly to the inclined ribs 30, the second damper fixing portion reinforcing ribs 52 are formed in the shape of thin plates and stand outward in the vehicle width direction from the surface of the concave portion 23. That is, the first damper fixing portion reinforcing rib 51 and the second damper fixing portion reinforcing rib 52 form a substantially V-shape in a side view of the vehicle. The second damper fixing portion reinforcing rib 52 is disposed so as to intersect with the fourth horizontal rib 44 .

[0042] The branch rib 61 is formed in a thin plate shape, curved in an upwardly convex arc, and erected outward in the vehicle width direction from the surface of the concave portion 23 . The branch rib 61 connects the lower end portion of the first damper fixing portion reinforcing rib 51 , the lower end portion of the second inclined rib 32 , and the first horizontal rib 41 . Additionally, the front end of the branch rib 61, the rear end of the fifth horizontal rib 45, and the rear end of the second inclined rib 32 are arranged so as to be connected at one point in a side view of the vehicle. Furthermore, the rear end of the branch rib 61 is arranged to connect to the first horizontal rib 41 .

[0043] The reinforcing ribs 71 are erected in parallel along the vehicle longitudinal direction, forward of the top of the wheel house 12 on the surface of the convex portion 24 of the vehicle width portion 22b that constitutes the wheel house 12 (see FIGS. 6 and 7). The reinforcing rib 71 intersects with the front end portions of the inclined ribs 30 and the front end portions of the horizontal ribs 40, with the house main body 22 sandwiched therebetween.

[0044] Although the vehicle structure S of this embodiment is configured to include two reinforcing ribs 71, the present invention is not limited to this configuration. For example, if the width dimension of the wheel V6 housed in the wheel house 12 (the dimension in the vehicle width direction of the vehicle width portion 22b) is larger than that of this embodiment, the number of reinforcing ribs 71 can be increased. Furthermore, if the width dimension of the wheel V6 housed in the wheel house 12 is smaller than that of this embodiment, the reinforcing ribs 71 can be reduced or eliminated.

[0045] Next, the effects of this embodiment will be described. In the vehicle structure S of this embodiment, the recessed portion 23 is provided with first to fifth horizontal ribs 41, 42, 43, 44, 45 that extend along a horizontal plane and stand outward in the vehicle width direction. With this configuration, the rear collision load input from the frame connection portion 11a can be transmitted and dispersed over a wide range of the wheel house 12. This reduces localized stress concentration and eliminates the need to provide strong frame members or reinforcing members for load transmission, thereby reducing the overall weight of the vehicle.

[0046] In this embodiment, the first horizontal rib 41 is disposed so as to overlap the lower edge of the frame connection portion 11a in the vehicle up-down direction. With this configuration, the first horizontal rib 41 can be configured to extend from a position overlapping the lower surface of the frame connection portion 11a to the front end of the recessed portion 23 in a side view of the vehicle. This allows the rear collision load input from the frame connection portion 11a to be efficiently transmitted over a wide range of the wheel house 12.

[0047] In this embodiment, the second horizontal rib 42 is arranged so as to overlap the upper edge of the frame connection portion 11a in the vehicle up-down direction. With this configuration, the rear collision load input from the frame connection portion 11a can be transmitted to a wider range of the wheel house 12. Furthermore, the second horizontal rib 42 extends substantially horizontally toward the front of the vehicle body, and therefore can more efficiently and firmly transmit a rearward collision load input in the front-rear direction to the front.

[0048] In this embodiment, the third horizontal rib 43 is disposed at a position overlapping the damper fixing portion 25 in the vehicle up-down direction. With this configuration, the third horizontal rib 43 can distribute the load input from the damper fixing portion 25 in the front-rear direction of the wheel house 12. Furthermore, by arranging the third horizontal rib 43 in this manner, the collision load from behind can be dispersed in the front-rear direction also at the top of the wheel house 12.

[0049] In this embodiment, the fourth horizontal rib 44 is disposed at a substantially midpoint between the damper fixing portion 25 and the frame connecting portion 11a in the vehicle up-down direction. With this configuration, the fourth horizontal rib 44 can distribute the rear collision load over a wider range of the wheel house 12.

[0050] In this embodiment, the fifth horizontal rib 45 is disposed at a substantially midpoint between the upper and lower surfaces of the frame connection portion 11a in the vehicle vertical direction. With this configuration, the fifth horizontal rib 45 can more firmly withstand a rear collision load input in the front-rear direction from the rear frame V3. This allows the collision load to be distributed over a wider area of ​​the wheel house 12.

[0051] In addition, in this embodiment, the protruding dimension T1 of the second horizontal rib 42 protruding outward in the vehicle width direction is set so that the protruding dimension T1 of the portion located forward of the front end of the frame connection portion 11a is larger than the protruding dimension T1 of the portion located rearward of the front end of the frame connection portion 11a. With this configuration, the load from the rear frame V3 that is pushed forward during a rear collision can be more firmly received and transmitted.

[0052] In this embodiment, a reinforcing rib 71 extending in the vehicle longitudinal direction is disposed on the convex surface portion 24 at a position intersecting the end of the horizontal rib 40 on the vehicle interior side in the vehicle longitudinal direction. With this configuration, the rear collision load transmitted from each horizontal rib 40 can be firmly received. This allows the load to be distributed over a wider area of ​​the wheel house 12.

[0053] In this embodiment, the fourth horizontal rib 44 is disposed so as to intersect with the first inclined rib 31. With this configuration, the collision load input to the fourth horizontal rib 44 can be transmitted to the first inclined rib 31 as well. This allows the load to be distributed over a wider area of ​​the wheel house 12.

[0054] In this embodiment, the first horizontal rib 41 and the second horizontal rib 42 are arranged such that their rear ends are located rearward of the front end of the frame connecting portion 11a. With this configuration, the first horizontal rib 41 and the second horizontal rib 42 can be configured to extend forward from behind the front end of the frame connection portion 11a. This allows the rear collision load input through the frame connection portion 11a to be transmitted more firmly and efficiently.

[0055] In this embodiment, the rear end of the third horizontal rib 43 is disposed so as to be located forward of the front end of the frame connecting portion 11a. With this configuration, the rear collision load input through the frame connection portion 11a can be transmitted more firmly and efficiently.

[0056] In the vehicle structure S of this embodiment, a configuration in which a vehicle body rear structure supporting rear wheels is configured has been described, but the present invention is not limited to this configuration. For example, it can be applied as a structure that constitutes a front body structure that supports the front wheels, and can achieve the same effects as those of this embodiment. In this case, the inside of the vehicle in the longitudinal direction of the vehicle refers to the rear of the vehicle, and the outside of the vehicle in the longitudinal direction of the vehicle refers to the front of the vehicle. [Explanation of symbols]

[0057] S Vehicle Structure 10 Structure 11 Floor panel 11a Frame connection 12R Right rear wheel house (wheel house) 12L Left rear wheel house (wheel house) 23 Concave portion 24 Convex part 25 Damper fixing part 30 Inclined Rib 40 horizontal ribs 41 First horizontal rib 42 Second horizontal rib 43 Third horizontal rib 44 4th horizontal rib 45 5th horizontal rib 71 Reinforcing rib V3 rear frame (frame) V6 wheels V7a damper T1 protrusion dimension

Claims

1. The vehicle comprises a structure in which a pair of wheel houses arranged spaced apart on the left and right and a floor panel connecting the pair of wheel houses are integrally formed by die-cast molding, The floor panel is a frame connection portion to which an inner end portion of a frame extending along the vehicle longitudinal direction is connected, Each wheel house includes: a concave surface portion having a concave curved surface that is curved into a substantially spherical shape while facing outward in the vehicle width direction; a convex surface portion formed on a rear surface of the concave surface portion, the convex surface protruding inward in the vehicle width direction and curved into a substantially spherical shape; and a shell shape having the following structure: The concave portion is disposed facing outward in the vehicle width direction, and a part of the wheel is accommodated within the concave portion, The concave portion is The vehicle is provided with a horizontal rib extending along a horizontal plane and erected outward in the vehicle width direction. A vehicle structure characterized by:

2. 2. The vehicle structure according to claim 1, The horizontal rib is a first horizontal rib arranged to overlap the lower edge of the frame connection portion in the vehicle vertical direction; A vehicle structure characterized by:

3. 2. The vehicle structure according to claim 1, The horizontal rib is a second horizontal rib disposed so as to overlap the upper edge of the frame connection portion in the vehicle vertical direction; A vehicle structure characterized by:

4. 2. The vehicle structure according to claim 1, The concave portion is a damper fixing portion for supporting a damper at a top portion in the vehicle vertical direction; The horizontal rib is a third horizontal rib disposed at a position overlapping the damper fixing portion in the vehicle vertical direction; A vehicle structure characterized by:

5. 2. The vehicle structure according to claim 1, The concave portion is a damper fixing portion for supporting a damper at a top portion in the vehicle vertical direction; The horizontal rib is a fourth horizontal rib disposed at a substantially midpoint between the damper fixing portion and the frame connecting portion in the vehicle vertical direction; A vehicle structure characterized by:

6. 2. The vehicle structure according to claim 1, The horizontal rib is a fifth horizontal rib disposed at a substantially midpoint between the upper and lower surfaces of the frame connection portion in the vehicle vertical direction; A vehicle structure characterized by:

7. 2. The vehicle structure according to claim 1, The horizontal rib is The protruding dimension of a portion of the frame connection portion that is located on the vehicle inner side relative to the vehicle inner end in the vehicle longitudinal direction is set to be larger than the protruding dimension of a portion of the frame connection portion that is located on the vehicle outer side relative to the vehicle inner end. A vehicle structure characterized by:

8. 2. The vehicle structure according to claim 1, The convex portion is A reinforcing rib is provided along the vehicle front-rear direction, The reinforcing rib is The horizontal rib is disposed at a position where it intersects with the end of the horizontal rib on the vehicle inner side in the longitudinal direction of the vehicle. A vehicle structure characterized by:

9. 2. The vehicle structure according to claim 1, The concave portion is The vehicle has an inclined rib that intersects with the horizontal rib, extends from below on the outer side of the vehicle in the longitudinal direction toward above on the inner side of the vehicle in the longitudinal direction, and stands outward in the vehicle width direction. A vehicle structure characterized by:

10. 2. The vehicle structure according to claim 1, The horizontal rib is The end on the outer side of the vehicle in the front-to-rear direction is The frame connecting portion is disposed on the outer side of the vehicle than the inner side end of the frame connecting portion. A vehicle structure characterized by:

11. 2. The vehicle structure according to claim 1, The horizontal rib is The end on the outer side of the vehicle in the front-to-rear direction is The frame connecting portion is disposed on the inner side of the vehicle. A vehicle structure characterized by:

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