Vehicle body front structure

Abstract

To provide a vehicle body front structure which can inhibit deformation of a power unit room even in either of a full lap front collision and a small lap front collision.SOLUTION: A vehicle body front structure includes: front side frames 22 extending in a front-back direction of a vehicle body 2 at a side part of a motor room 6; lower side frames 31 extending in the front-back direction of the vehicle body 2 below the front side frames 22; first crash boxes 38 each provided at a front end of the front side frame 22; second crash boxes 41 each provided at a front end of the lower side frame 31; and inclined plates 36 each fixed to the lower side frame 31 directly behind the second crash box. The inclined plate 36 inclines to an area above the lower side frame 31 and the outer side in a vehicle width direction with at least a part of a plate surface facing an outer surface in the vehicle width direction of the front side frame 22.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a front body structure of a vehicle having a power unit room at the front of the vehicle body. [Background technology]

[0002] Generally, vehicles such as automobiles have a power unit room in the front part of the vehicle body. A power unit such as an engine or an electric motor is mounted in the power unit room. Such a power unit is a rigid body. Therefore, it is almost impossible to make the power unit absorb the impact during a frontal collision of the vehicle. When the power unit moves backward due to the impact during a frontal collision, it deforms the passenger compartment. Therefore, it is preferable that the power unit room absorbs the collision load during a frontal collision in front of the power unit.

[0003] As a vehicle body front structure for mitigating a collision load during a frontal collision, for example, the vehicle body front structure disclosed in Patent Document 1 (JP Patent Publication 2015-168363 A) is well known. The vehicle body front structure disclosed in Patent Document 1 includes a pair of first crash boxes respectively connected to a pair of side frames (front side frames), a pair of second crash boxes respectively connected to a pair of lower members (lower side frames), a pair of left and right vertical columns connecting the first crash boxes and the second crash boxes, and a connecting member connecting the vertical columns to each other. The connecting member restricts the vertical columns from being displaced outward in the width direction of the vehicle body, and maintains the support rigidity in the extension direction of the second crash boxes. As a result, the vehicle body front structure disclosed in Patent Document 1 efficiently absorbs the collision load not only by the first crash boxes but also by the second crash boxes. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-168363 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the technology disclosed in the above-mentioned Patent Document 1 may have difficulty in suppressing the deformation of the power unit room in a small wrap frontal collision or the like. For example, when a large collision load acts locally on one side area of ​​the front of the vehicle body due to a small wrap frontal collision, it may be difficult for the first crash box and the second crash box present on one side area of ​​the vehicle body alone to sufficiently absorb the collision load. In such a case, it becomes difficult to sufficiently suppress the deformation of the power unit room.

[0006] In particular, in a vehicle body front structure equipped with a power unit for an electric vehicle, it becomes more difficult to suppress the deformation of the power unit room in a small wrap frontal collision. That is, the power unit of an electric vehicle is easier to reduce in size than a power unit using a reciprocating engine or the like. When the power unit is reduced in size, the lower side frame for supporting the power unit is disposed on the inner side in the vehicle width direction than the front side frame. Therefore, the second crash box is disposed on the inner side in the vehicle width direction than the first crash box. It becomes difficult for the second crash box disposed in this way to sufficiently absorb the collision load in a small wrap frontal collision. As a result, it becomes more difficult for the vehicle body front structure for an electric vehicle to sufficiently suppress the deformation of the power unit room.

[0007] An object of the present invention is to provide a vehicle front body structure that can suppress deformation of the power unit compartment in both a full-wrap frontal collision and a small-wrap frontal collision. [Means for solving the problem]

[0008] A vehicle front structure according to one embodiment of the present invention comprises a front side frame extending in the fore-and-aft direction of the vehicle body on the side of a power unit room, a lower side frame extending in the fore-and-aft direction of the vehicle body below the front side frame, a first crash box provided at a front end of the front side frame, a second crash box provided at the front end of the lower side frame, and an inclined plate fixed to the lower side frame immediately behind the second crash box, wherein the inclined plate is inclined upward and outward in the vehicle width direction of the lower side frame with at least a portion of its plate surface facing the outer surface of the front side frame in the vehicle width direction. Effect of the Invention

[0009] According to the vehicle body front structure of the present invention, deformation of the power unit compartment can be suppressed in both a full-wrap frontal collision and a small-wrap frontal collision. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a side view showing a main part of the front body structure of an electric vehicle; [Diagram 2] FIG. 2 is a plan view showing a main part of the front body structure of an electric vehicle; [Diagram 3] FIG. 2 is a front view showing a main part of the front body structure of an electric vehicle; [Figure 4] FIG. 1 is a perspective view showing a main part of a front body structure of an electric vehicle; [Diagram 5] FIG. 1 is a perspective view showing a main part of an electric vehicle with the bumper beam removed. [Figure 6] FIG. 1 is an exploded perspective view showing a main part of a front body structure of an electric vehicle; [Figure 7] A side view showing the behavior of the front body structure in the early stages of a full-wrap frontal collision [Figure 8] A side view showing the behavior of the front body structure in the mid-section during a full-wrap frontal collision [Figure 9] A side view showing the behavior of the front body structure in the final stages of a full-wrap frontal collision [Figure 10] A side view showing the behavior of the vehicle body structure in the early stages of a small wrap frontal collision [Figure 11] Plan view showing the behavior of the vehicle body structure in the early stages of a small wrap frontal collision [Figure 12] A side view showing the behavior of the vehicle body structure in the mid-stage during a small-lap frontal collision [Figure 13] Plan view showing the behavior of the vehicle body structure in the mid-section during a small-lap frontal collision [Figure 14] A side view showing the behavior of the vehicle body structure in the final stages of a small-lap frontal collision [Figure 15] Plan view showing the behavior of the vehicle body structure in the final stages of a small-lap frontal collision DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figures 1 to 15 show one embodiment of the present invention.

[0012] As shown in FIGS. 1 and 4, a vehicle body 2 of a vehicle 1 such as an electric vehicle includes a cabin 5 and a motor room 6 serving as a power unit room.

[0013] The cabin 5 is provided in approximately the center in the front-rear direction of the vehicle body 2. A vehicle body framework forming the cabin 5 includes a floor panel 10, a toe board 11, a pair of left and right side sills 12, and a pair of left and right front pillars 13.

[0014] The floor panel 10 is formed, for example, from a substantially flat sheet metal member. The floor panel 10 forms the floor surface of the cabin 5. A battery chamber 15 is provided below the floor panel 10. A plurality of batteries 16 are housed inside the battery chamber 15.

[0015] The toe board 11 is formed, for example, by a sheet metal member having a shape standing upward from the tip of the floor panel 10. The toe board 11 constitutes a partition wall that separates the cabin 5 and the motor room 6.

[0016] Each side sill 12 is, for example, a hollow member having a closed cross-sectional shape. Each side sill 12 is formed, for example, by joining a plurality of panels. Each side sill 12 extends in the front-rear direction of the vehicle body 2 on the left and right side portions of the floor panel 10. Furthermore, each side sill 12 is joined to the left and right side portions of the floor panel 10, respectively.

[0017] Each front pillar 13 is, for example, a hollow member having a closed cross-sectional shape. Each front pillar 13 is formed, for example, by joining a plurality of panels. The lower end of each front pillar 13 is joined to the front end of each side sill 12. In addition, the left and right side portions of the toe board 11 are joined to each front pillar 13.

[0018] The motor room 6 is provided in front of the cabin 5. A vehicle body framework forming the motor room 6 includes a pair of left and right upper side frames 21, a pair of left and right front side frames 22, and a cradle 23.

[0019] Each upper side frame 21 is made of, for example, sheet metal. The rear ends of each upper side frame 21 are joined to the corresponding front pillars 13. As a result, each upper side frame 21 extends in the front-rear direction of the vehicle body 2 above the left and right sides of the motor room 6.

[0020] Each of the front side frames 22 is, for example, a hollow member having a rectangular closed cross-sectional shape. Each of the front side frames 22 is formed, for example, by joining a plurality of panels.

[0021] Each front side frame 22 has a rear region 22a, an inclined region 22b, and a front region 22c along the longitudinal direction.

[0022] Each rear region 22a extends substantially horizontally toward the front of the vehicle body 2. A rear end of each rear region 22a is joined to a front end of each side sill 12 via, for example, each torque box 27. This enables each rear region 22a to transmit an impact load transmitted from the front of the vehicle body 2 to the side sill 12 during a frontal collision of the vehicle 1.

[0023] Each inclined region 22b is inclined from the front end of each rear region 22a toward the front of the vehicle body 2 at a predetermined elevation angle.

[0024] Each front region 22c extends substantially horizontally toward the front of the vehicle body 2 from the front end of each inclined region 22b.

[0025] 5, a suspension tower 30 is provided between each upper side frame 21 and each front side frame 22. A portion of each suspension tower 30 is integrally formed with each upper side frame 21 and each front side frame 22.

[0026] As shown in FIGS. 1 and 6, the cradle 23 is configured to have, for example, a pair of left and right lower side frames 31 and a pair of front and rear cross members 32.

[0027] Each lower side frame 31 is, for example, a hollow member having a rectangular closed cross-sectional shape. Each lower side frame 31 is formed, for example, by joining a plurality of panels. These lower side frames 31 extend in the front-rear direction of the vehicle body 2.

[0028] 2, for example, the interval between each lower side frame 31 in the vehicle width direction is set to be narrower than the interval between the pair of front side frames 22. Furthermore, each lower side frame 31 is disposed at a position where a part of an outer region of each lower side frame 31 in the vehicle width direction overlaps with each front side frame 22 in the up-down direction.

[0029] A suspension arm 37 is connected to the outer surface in the vehicle width direction of each lower side frame 31 (see Figs. 4 to 6). As a result, each suspension arm 37 is supported by the cradle 23 so as to be able to swing freely in the up and down direction.

[0030] Each cross member 32 is, for example, a hollow member having a closed cross-sectional shape. Each cross member 32 is formed, for example, by joining a plurality of panels. Each cross member 32 extends in the vehicle width direction with a predetermined interval therebetween in the front-rear direction of the vehicle body.

[0031] The left and right ends of each cross member 32 are joined to the middle of each lower side frame 31. As a result, each lower side frame 31 and each cross member 32 constitutes a cradle 23 for supporting a power unit 45 such as a motor and a control unit 46 on the vehicle body 2.

[0032] The cradle 23 thus configured is joined to the lower part of each front side frame 22 as shown in Figs. 1 to 5. Specifically, the rear region of each lower side frame 31 constituting the cradle 23 is joined to the rear region 22a of each front side frame 22. Furthermore, a middle part of each lower side frame 31 is joined to the front region 22c of each front side frame 22 via a columnar reinforcing member 33. As shown in Fig. 1, the reinforcing member 33 has, for example, a rectangular column shape. It is preferable that this reinforcing member 33 is joined to the front part of the suspension tower 30.

[0033] With the cradle 23 joined to each front side frame 22 in this manner, the front end of each lower side frame 31 is disposed at a position in the front-rear direction of the vehicle body substantially equal to the front end of each front side frame 31 (see FIGS. 1, 2, and 5). That is, each lower side frame 31 extends forward of the vehicle body forward of each cross member 32 provided on the cradle 23. In other words, the front region of each lower side frame 31 is set longer than the length required to support the power unit 45 and the like.

[0034] A radiator support 35 is attached to the inside of the front end portion of each of the lower side frames 31. Furthermore, an inclined plate 36 is provided in the front region (extension portion) of each of the lower side frames 31, outside the radiator support 35 in the vehicle width direction.

[0035] The radiator support 35 is a frame for supporting a radiator core (not shown) in the front part of the motor room 6. The radiator support 35 has a radiator lower frame 35l, a radiator upper frame 35u, and a pair of left and right radiator side frames 35s.

[0036] The radiator lower frame 35l extends in the vehicle width direction at the front end of each lower side frame 31. The left and right ends of this radiator lower frame 35l are joined to the front end of each lower side frame 31. As a result, in the cradle 23, the radiator lower frame 35l, together with the pair of front and rear cross members 32 and the pair of left and right lower side frames 31, form a so-called ladder structure.

[0037] The radiator upper frame 35u extends in the vehicle width direction above the radiator lower frame 35l. The radiator upper frame 35u is connected to the radiator lower frame 35l via a pair of radiator side frames 35s. That is, the left and right ends of the radiator lower frame 35l and the radiator upper frame 35u are connected via the pair of radiator side frames 35s.

[0038] A bracket 35b is provided on each of the radiator side frames 35s. Each bracket 35b is made of, for example, a flat plate member extending outward in the vehicle width direction.

[0039] A front end portion of each front side frame 22 is joined to the rear surface of each bracket 35b. A first crash box 38 protruding forward of the vehicle body 2 is joined to the front surface of each bracket 35b. Each first crash box 38 is disposed at a position continuous with each front side frame 22 via each bracket 35b. Furthermore, a bumper beam 39 extending in the vehicle width direction is joined to the front end portion of each first crash box 38.

[0040] Each of the inclined plates 36 is made of a thick metal plate member having a predetermined rigidity. As shown in Fig. 1, each of the inclined plates 36 is made of, for example, a flat plate having a right-angled triangular shape.

[0041] Each inclined plate 36 is disposed in the front region of each lower side frame 31 with its bottom portion extending along the front-rear direction of the vehicle body 2 (see Figs. 1 and 2). That is, each inclined plate 36 is disposed in the front region of each lower side frame 31 at a front-rear position of the vehicle body 2 immediately behind each first crash box 38. Each inclined plate 36 is disposed so as to incline upward and toward the outside in the vehicle width direction of the lower side frame 31 with at least a part of the plate surface of each inclined plate 36 facing the outer surface of each front side frame 22 in the vehicle width direction (see Figs. 2 to 4). Furthermore, for example, as shown in Fig. 3, each inclined plate 36 is preferably disposed in a position where at least a part is hidden by the bumper beam 39 when the vehicle body 2 is viewed from the front.

[0042] The bottom of each of the inclined plates 36 thus arranged is fixed to the front region of the corresponding lower side frame 31 by welding or the like. The top of each of the inclined plates 36 is fixed to each of the brackets 35b on the outer side in the vehicle width direction than each of the front side frames 22. Furthermore, the top side of each of the inclined plates 36 is connected to the radiator lower frame 35l via, for example, a pipe-shaped stay 40. As a result, each of the inclined plates 36 is firmly fixed to the front of the vehicle body 2.

[0043] Here, by being inclined as described above, each inclined plate 36 can be fixed to the lower side frame 31 without interfering with the front wheels during steering.

[0044] The shape of each inclined plate 36 is not limited to a right-angled triangle. For example, various triangular, trapezoidal, rectangular, or other shapes may be adopted as the shape of each inclined plate 36. However, it is preferable that each inclined plate 36 has a tapered shape from the base side to the top side.

[0045] A second crash box 41 is joined to the front end of each lower side frame 31 to which each inclined plate 36 is fixed in this manner. That is, each second crash box 41 is disposed immediately in front of each inclined plate 36. Furthermore, a lip spoiler 42 extending in the vehicle width direction is joined to the front end of each second crash box 41.

[0046] Next, the operation of the vehicle body 2 during a full-wrap frontal collision will be described.

[0047] For example, as shown in Fig. 7, in the early stage of a full-wrap frontal collision, the bumper beam 39 and each of the first crash boxes 38 are crushed (buckled) by the collision of the wall-like obstacle 50w. At the same time, the lip spoiler 42 and the second crash boxes 41 are crushed (buckled) by the collision of the wall-like obstacle 50w.

[0048] In the middle of the subsequent collision, for example, as shown in Fig. 8, the front regions 22c of the front side frames 22 and the front regions of the lower side frames 31 of the cradle 23 start to collapse (buckle). Due to the collapse of the front regions of the lower side frames 31, the collision load is transmitted to the bottom portions of the inclined plates 36. As a result, the inclined plates 36 deform together with the lower side frames 31, and the obstruction of the crash stroke by the inclined plates 36 is suppressed.

[0049] In the final stage of the collision, the crushing of the front side frames 22 and the lower side frames 31 progresses as shown in FIG.

[0050] In this case, the rear portion of each lower side frame 31 is connected to each front side frame 22. Furthermore, the middle portion of each lower side frame 31 is connected to each front side frame 31 via a reinforcing member 33. As a result, each lower side frame 31 generates a reaction force in the front area of ​​the motor room 6 without retreating rearward of the vehicle body 2 during a frontal collision. As a result, each lower side frame 31 cooperates with each front side frame 22 to suppress deformation of the motor room 6.

[0051] Next, the action of the small wrap during a frontal collision will be described.

[0052] 10 and 11, in the early stage of a small wrap frontal collision, the bumper beam 39 and the first crash box 38 on the side where the obstacle 50p such as a pole collided with are crushed. At the same time, the lip spoiler 42 and the second crash box 41 on the side where the obstacle 50p such as a pole collided with are crushed.

[0053] The second crash box 41 is disposed on the inside in the vehicle width direction relative to the first crash box 38. Therefore, depending on the collision position of the obstacle 50p, the amount of crushing of the first crash box 38 and the amount of crushing of the second crash box 41 differ. In the example shown in Figs. 10 and 11, the amount of crushing of the second crash box 41 is relatively smaller than the amount of crushing of the first crash box 38.

[0054] In the middle of the collision, for example, as shown in FIGS. 12 and 13, the side ends of the bumper beam 39 and the lip spoiler 42 are crushed, and the first and second crash boxes 38, 41 are also crushed.

[0055] In the final stage of the collision, for example, as shown in FIGS. 14 and 15, the obstacle 50p reaches the vicinity of the front side frame 22, the lower side frame 31, and the inclined plate .

[0056] Here, the bottom of the inclined plate 36 is fixed to the lower side frame 31 which is firmly connected to the lower part of the front side frame 22. The top side of the inclined plate 36 is disposed outward in the vehicle width direction from the lower side frame 31. Therefore, even if the obstacle 50p enters the vehicle body 2 while being shifted outward in the vehicle width direction relative to the lower side frame 31, the lower side frame 31 transmits a reaction force to the obstacle 50p via the inclined plate 36.

[0057] Therefore, the inclined plate 36 is deformed while transmitting the reaction force from the lower side frame 31 to the obstacle. In this case, the inclined plate 36 has a triangular shape tapered from the bottom side to the top side. Therefore, when a collision load from the obstacle is input, the top side of the inclined plate 36 is deformed more than the bottom side. As the obstacle is guided by the deformed inclined plate 36, the contact position between the obstacle 50p and the vehicle body 2 shifts outward in the vehicle width direction. Due to such a shift in the contact position, the collision load that is not absorbed by the first and second crash boxes 38, 41, etc. is converted into a yaw moment that rotates the vehicle body 2. For example, when the obstacle 50p collides with the left side of the vehicle body 2, a yaw moment is generated in the vehicle body 2 in a direction that rotates the front part of the vehicle body 2 to the right.

[0058] By generating such a yaw moment by the inclined plate 36, the collision load transmitted from the obstacle 50p to the front side frame 22 and the lower side frame 31 is reduced. As a result, the front parts of the front side frame 22 and the lower side frame 31 are released from the collision load of the obstacle 50p without being significantly deformed.

[0059] According to this embodiment, the vehicle front structure includes a front side frame 22 extending in the front-rear direction of the vehicle body 2 at the side of the motor room 6, a lower side frame 31 extending in the front-rear direction of the vehicle body 2 below the front side frame 22, a first crash box 38 provided at the front end of the front side frame 22, a second crash box 41 provided at the front end of the lower side frame 31, and an inclined plate 36 fixed to the lower side frame 31 in the direction perpendicular to the second crash box. The inclined plate 36 is inclined toward the upper side of the lower side frame 31 and toward the outside in the vehicle width direction with at least a part of the plate surface facing the outer surface of the front side frame 22 in the vehicle width direction. With this configuration, deformation of the motor room 6 can be suppressed in both a full-wrap frontal collision and a small-wrap frontal collision.

[0060] That is, the vehicle body 2 has a lower side frame 31 below the front side frame 22. The vehicle body 2 also has a first crash box 38 and a second crash box 41 provided at the front end of the front side frame 22 and the front end of the lower side frame 31, respectively. With this configuration, the vehicle body 2 can distribute and absorb the collision load during a full-overlap frontal collision to the first crash box 38 and the second crash box 41. This allows for efficient impact absorption in front of the motor room 6, and effectively suppresses deformation of the motor room 6.

[0061] The vehicle body 2 also includes an inclined plate 36 fixed to the lower side frame 31 immediately behind the second crash box 41. The inclined plate 36 is inclined upward and outward in the vehicle width direction of the lower side frame 31 with at least a part of the plate surface facing the outer surface of the front side frame 22 in the vehicle width direction. With these configurations, even if the obstacle 50p enters the vehicle body 2 while being shifted outward in the vehicle width direction relative to the lower side frame 31, the lower side frame 31 can transmit a reaction force to the obstacle 50p via the inclined plate 36. The inclined plate 36 deforms while transmitting the reaction force from the lower side frame 31 to the obstacle 50p, so that the inclined plate 36 shifts the position of the obstacle 50p and the vehicle body 2 outward in the vehicle width direction. As a result, the inclined plate 36 can convert the collision load that is not absorbed by the first and second crash boxes 38, 41, etc., into a yaw moment of the vehicle body 2. As a result, the transmission of the collision load to the motor room 6 can be suppressed, and deformation of the motor room 6 can be effectively suppressed.

[0062] In this case, the inclined plate 36 is a triangular plate, and its bottom side is fixed to the lower side frame 31. As a result, the inclined plate 36 can deform its top side while transmitting a reaction force from the lower side frame 31 to the obstacle 50p, thereby moving the contact position between the obstacle 50p and the vehicle body 2 outward in the vehicle width direction.

[0063] In addition, each lower side frame 31 also serves as a component of the cradle 23 that supports the power unit 45 and the like in the motor room 6. This makes it possible to configure an impact absorbing structure in the lower part of the vehicle body 2 without increasing the number of parts.

[0064] In this case, the front end portion of each lower side frame 31 is connected to a radiator lower frame 35l that constitutes the radiator support 35. This makes it possible to stiffen the lower side frame 31 without increasing the number of parts.

[0065] Furthermore, the radiator side frame 35s of the radiator support 35 supports the front end of the front side frame 22 and the upper end (top) of the inclined plate 36 via the bracket 35b. This makes it possible to connect the tip of the front side frame 22 to the tip of the lower side frame 31 via the inclined plate 36 and the bracket 35b. In addition, the bottom and top of the inclined plate 36 can be fixed to the vehicle body 2, making it possible to suppress vibration of the inclined plate 36 even during driving.

[0066] The invention described in the above embodiment is not limited to the embodiment, and various modifications can be made in the implementation stage without departing from the gist of the invention. Furthermore, the above embodiment includes inventions at various stages, and various inventions can be extracted by appropriate combinations of the disclosed constituent elements.

[0067] For example, if the problem described can be solved and the effect described can be obtained even if some of the constituent elements are deleted from all the constituent elements shown in the above form, the configuration from which these constituent elements are deleted can be extracted as an invention. [Explanation of symbols]

[0068] 1 … Vehicles (electric vehicles) 2 … Body 5 … Cabin 6 … Motor room 10 … Floor panel 11 ... Toeboard 12 ... Side sill 13 … Front pillar 15 … Battery compartment 16 … Battery 21 ... Upper side frame 22 … Front side frame 22a … Rear area 22b … Slope area 22c … Front area 23 … Cradle 27 ... Torque box 30 … Suspension tower 31 ... Lower side frame 32 … Cross member 33 … Reinforcement member 35 … Radiator support 35l … Radiator lower frame 35u … Radiator upper frame 35s … Radiator side frame 35b … bracket 36 … Inclined plate 37 ... Suspension arm 38 … First crash box 39 ... Bumper beam 41 … 2nd crash box 42 ... Lip spoiler 45 … Power unit 46 ... Control unit

Claims

1. a front side frame extending in a front-rear direction of the vehicle body at a side of the power unit room; a lower side frame extending in a front-rear direction of the vehicle body below the front side frame; a first crash box provided at a front end of the front side frame; A second crash box provided at a front end portion of the lower side frame; an inclined plate fixed to the lower side frame immediately behind the second crash box, a front body structure comprising: a lower side frame and a rear side frame, the rear side frame being inclined upward and outward in the vehicle width direction, the rear side frame being inclined upward and outward in the vehicle width direction, and the rear side frame being inclined upward and outward in the vehicle width direction, with at least a portion of the plate surface facing the outer surface of the front side frame in the vehicle width direction.

2. The inclined plate is a triangular plate, 2. The vehicle front body structure according to claim 1, wherein a bottom portion of the triangular plate is fixed to the lower side frame.

3. a radiator support for holding a radiator is provided at a front portion of the power unit room; 2. The vehicle front body structure according to claim 1, wherein a front end portion of the lower side frame is connected to a radiator lower frame that constitutes a lower portion of the radiator support.

4. 4. The vehicle front body structure according to claim 3, wherein a front end of the front side frame and an upper end of the inclined plate are connected via a bracket to a radiator side frame constituting a side portion of the radiator support.

5. 2. The vehicle front body structure according to claim 1, wherein the lower side frame is a support member for supporting a power unit in the power unit room, and is connected to the front side frame.

Images