Vehicle front structure

Abstract

Provided is a vehicle front structure capable of suppressing deterioration of a connection portion due to rust or the like by preventing water from accumulating in the connection portion between a rear end portion and a fixed portion. A vehicle front structure (10) includes a rear end portion (22) that constitutes a rear portion of a front side frame (12) and has an inclined portion (31) inclined downward toward the rear of a vehicle, a fixed portion (13) provided to the inclined portion (31), and a lower arm linked to the fixed portion (13). The inclined portion (31) has a bottom portion (51) inclined downward toward the rear of the vehicle and a protruding portion (52) protruding upward more than the bottom portion (51). The protruding portion (52) extends toward the rear of the vehicle from a position forward of the fixed portion (13) in the vehicle, and a central side in the vehicle width direction of the protruding portion (52) protrudes upward more than an outer side in the vehicle width direction of the protruding portion (52).

Description

Technical Field

[0001] This invention relates to the front structure of a vehicle. Background Technology

[0002] As a front structure of a vehicle, a structure is known in which a central frame is connected to a front side frame by a connecting part, and the connecting part is fixed to a sub-frame by a fixing part. The flange of the upper front part of the central frame is connected to the lower plate of the front bulkhead, and the central frame has a rearward inclined part that slopes upward toward the rearward direction of the vehicle at the front. In addition, a sub-frame is fixed to the central frame via a fixing part at a flat part relative to the rearward inclined part near the front of the vehicle. Moreover, a lower arm supporting the suspension is connected to the rear part (hereinafter, sometimes referred to as the rear end) of the sub-frame and the front side frame (for example, see Japanese Patent Application Laid-Open No. 2017-128175). Summary of the Invention

[0003] Here, for example, consider a sloped portion formed at the rear end, and the lower arm supported on the sloped portion. For example, a fixing portion (specifically, a sleeve) is connected to the sloped portion at the rear end by a connecting portion obtained based on welding or the like, and the lower arm is connected to the rear end via the fixing portion.

[0004] In this case, there is a possibility that water flowing into the rear end of the front side frame may accumulate at the connection of the fixed part after passing through the inclined part, which may cause the connection to deteriorate due to rust or other reasons.

[0005] The purpose of this invention is to provide a vehicle front structure that can suppress the deterioration of the connection part due to rust or the like by preventing water from accumulating in the connection part between the rear end and the fixing part.

[0006] The first embodiment of the present invention provides a vehicle front structure comprising: a rear end portion constituting the rear portion of a front side frame and having an inclined portion that slopes downward toward the rear of the vehicle; a fixing portion disposed on the inclined portion; and a lower arm connected to the fixing portion. The inclined portion has: a bottom portion that slopes downward toward the rear of the vehicle; and a protrusion portion that protrudes upward beyond the bottom portion. The protrusion portion extends toward the rear of the vehicle from a position closer to the front of the vehicle than the fixing portion, and the central side of the protrusion portion in the vehicle width direction protrudes upward beyond the outer side of the protrusion portion in the vehicle width direction.

[0007] This configuration allows water flowing into the rear end of the front side frame to bypass the protrusion and flow away from it. Here, the protrusion extends from a position closer to the front of the vehicle than the fixing part, toward the rear. This allows water flowing into the rear end to bypass the fixing part. Therefore, for example, it prevents water from accumulating at the connection between the fixing part and the protrusion, which is joined by welding, bonding, etc., and it suppresses deterioration of the connection due to rust or other reasons.

[0008] In the second embodiment, the fixing part may be a sleeve connected to the outer periphery of the protrusion, and the protrusion extends outward in the vehicle width direction relative to the sleeve.

[0009] Here, for example, the fixing part (sleeve) is connected to the inclined part by welding, bonding, or the like. In particular, when the fixing part is connected to the inclined part by welding, there is a possibility that the connection obtained by welding may deteriorate due to water rust or other factors. Therefore, in this structure, the protrusion is extended outward relative to the sleeve in the vehicle width direction. As a result, water flowing into the rear end is less likely to flow to the connection. Thus, water accumulation in the connection can be prevented, and deterioration of the connection due to rust or other factors can be suppressed.

[0010] In the third embodiment, the vehicle-front portion of the outer periphery of the sleeve and the vehicle-rear portion of the outer periphery of the sleeve may be connected to the protrusion via a connecting portion.

[0011] With this configuration, for example, compared to the case where the connecting part is located in the vehicle width direction, it is possible to suppress the situation where the width of the protrusion widens in the vehicle width direction. As a result, the width in the vehicle width direction can be smoothly extended from the front end of the protrusion to the vicinity of the sleeve, and the situation where the water flow stagnates at the part where the width of the expansion in the vehicle width direction can be suppressed.

[0012] Furthermore, the connecting portions on the front and rear sides of the vehicle can be positioned within the protrusion at the top of the sleeve. This better prevents water flowing into the rear end from accumulating in the connecting portion.

[0013] In the fourth embodiment, the protrusion may have a front end portion whose width in the vehicle width direction at the vehicle front side of the rear end is narrower than that near the fixing portion.

[0014] With this configuration, water flowing into the rear end can be reliably guided from the front end to the bottom portion located on the outer side of the front end in the vehicle width direction. This allows water flowing into the rear end to bypass the fixed portion and flow.

[0015] Conversely, for example, if the width of the front end in the vehicle width direction is expanded, there is a possibility that water flowing into the rear end may cross the front end and flow onto the upper surface of the protrusion. Therefore, considering the possibility of water accumulating in the connection, this could become a cause of deterioration of the connection due to rust or other reasons.

[0016] Furthermore, by making the width of the front end narrow, the width of the bottom can be ensured to be wide at the front part of the rear end (hereinafter, sometimes referred to as the front part). Therefore, welding space, such as for spot welding, can be ensured at the front part of the rear end. As a result, the rigidity of the rear end can be ensured, and components such as the fixing part and the lower arm can be firmly fixed to the inclined part.

[0017] In the fifth embodiment, the rear end can extend downwards from the rear end of the front side frame body in the front side frame in a manner that slopes toward the rear of the vehicle. The front side frame body extends from the front of the vehicle toward the rear of the vehicle. The width of the protrusion in the vehicle width direction at the part where it overlaps the rear end and the front side frame body is narrower than that near the fixed part.

[0018] With this configuration, the width of the bottom can be ensured to be wide at the overlapping section where the rear end and front side frame bodies overlap. Therefore, the rear end (especially the inclined section) and the front side frame bodies can be connected by welding operations such as spot welding without being obstructed by protrusions. This improves weld-based workability and securely fixes components such as the fixing part and lower arm to the inclined section.

[0019] In the sixth embodiment, the protrusion may have a recess that is positioned at the front of the vehicle and recessed downward relative to the fixing portion.

[0020] With this configuration, when the outer periphery of the fixed part is connected to the inclined part (specifically, the protrusion) by welding, such as MIG welding, the welding equipment (e.g., nozzle, metal electrode rod, etc.) can be operated without being obstructed by the protrusion. Therefore, welding-based workability is improved when the outer periphery of the fixed part is connected to the protrusion by welding.

[0021] According to the solution of the present invention, by preventing water from accumulating in the connection between the rear end and the fixing part, it is possible to suppress the deterioration of the connection due to rust or the like. Attached Figure Description

[0022] Figure 1 This is a perspective view of the front structure of the vehicle in the embodiment of the present invention, viewed from the lower right side.

[0023] Figure 2 This is a perspective view of the front structure of the vehicle in the embodiment of the present invention, viewed from the upper rear right side.

[0024] Figure 3 This is a perspective view of the front side frame body and rear end of the embodiment of the present invention, viewed from the upper right rear side.

[0025] Figure 4 It is along Figure 3 The sectional view is obtained by cutting along line IV-IV.

[0026] Figure 5 It is along Figure 3 The cross-sectional view is obtained by cutting along the VV line.

[0027] Figure 6 It is along Figure 3 The sectional view is obtained by cutting along the VI-VI line. Detailed Implementation

[0028] The following description, based on the accompanying drawings, illustrates the vehicle front structure according to an embodiment of the present invention. In the drawings, arrow FR indicates the front of the vehicle, arrow UP indicates the top of the vehicle, and arrow LH indicates the left side of the vehicle.

[0029] <Vehicle Front Structure>

[0030] Figure 1 This is a 3D view of the front structure of the vehicle when viewed from the lower right side. Figure 2 This is a three-dimensional view of the front structure of the vehicle viewed from the upper right rear side.

[0031] like Figure 1 , Figure 2 As shown, the vehicle front structure 10 is a structure that constitutes the skeleton of the front of the vehicle. Specifically, the vehicle front structure 10 includes, for example: a front side frame 12, a fixing part 13 provided on the front side frame 12, a central frame (passage side frame) 14 disposed in a position inside the vehicle width direction of the front side frame 12, a sub-frame 15 disposed below the front side frame 12 and the central frame 14, and a lower arm 16 connected to the sub-frame 15.

[0032] The front side frame 12 includes a front side frame body 21 extending horizontally from the front of the vehicle toward the rear of the vehicle, and a rear end portion 22 constituting the rear portion of the front side frame 12. That is, the rear end portion 22 is connected to the rear end portion 21a of the front side frame body 21 with its front side portion 22a overlapping with the rear end portion 21a of the front side frame body 21. The rear end portion 22 extends downward from the rear end portion 21a of the front side frame body 21 toward the rear of the vehicle.

[0033] Lower arm bracket 23 (also refer to) Figure 5 It is connected from below to the rear end 22. A fixing part 13 is provided at the rear end 22 and the lower arm bracket 23. The fixing part 13 is, for example, a sleeve. The sleeve has, for example, a mounting bolt 24 (see also...). Figure 5A through hole 25 allows passage from below. Details of the fixing part (sleeve) 13 and the rear end 22 will be described later.

[0034] An outwardly extending bracket 26 is provided at the rear end 22, extending outward in the direction of vehicle width.

[0035] A lower side beam (not shown) extends from the outer end 26a of the extended bracket 26 toward the rear of the vehicle.

[0036] The central frame 14 is positioned inside the rear end 22 in the vehicle width direction. The front end 14a of the central frame 14 is connected to the rear end 22 via a connecting part 27. The central frame 14 extends along the floor passage (not shown) toward the rear of the vehicle and is connected to the floor frame (not shown).

[0037] The sub-frame 15 is positioned below the front side frame body 21 and the central frame 14. The front end 15a of the sub-frame 15 is fixed to the front side frame body 21 from below. The rear end 15b of the sub-frame 15 is fixed to the front end 14a of the central frame 14 from below by mounting bolts 28.

[0038] The subframe 15 is equipped with an engine and transmission unit, or a power source such as a drive motor, and a steering device.

[0039] The rear end 16a of the lower arm 16 is connected from below to the fixed part 13 and the rear end 15b of the sub-frame 15 via a bracket 29. The bracket 29 is fixed to the fixed part 13 and the rear end 15b of the sub-frame 15 by mounting bolts 24 and 28.

[0040] The front end 16b of the lower arm 16 is connected to the front end 15a of the subframe 15 by mounting bolts 37. A suspension (not shown) or similar component is supported on the lower arm 16.

[0041] <Rear End>

[0042] Figure 3 This is a perspective view of the front side frame body 21 and the rear end 22 when viewed from the upper right rear side. Figure 4 It is along Figure 3 The sectional view is obtained by cutting along line IV-IV.

[0043] like Figure 3 , Figure 4As shown, the rear end 22 extends downward from the rear end 21a of the front side frame body 21 in a manner that slopes toward the rear of the vehicle. The rear end 22 has, for example, an inclined portion 31 that overlaps the front side frame body 21 from above, an outer wall portion 32 that rises upward from the outer side of the inclined portion 31, an inner wall portion 33 that rises upward from the inner side of the inclined portion 31, an outer flange 34 that extends outward in the vehicle width direction from the upper side of the outer wall portion 32, and an inner flange 35 that extends inward in the vehicle width direction from the upper side of the inner wall portion 33.

[0044] The inclined portion 31 is positioned upwards, and the portion of the inclined portion 31 on the vehicle front side overlaps from above the rear end of the frame bottom 41 in the front side frame body 21. The inclined portion 31 extends downwards from the rear end of the frame bottom 41 in a manner that slopes toward the rear of the vehicle. Details regarding the inclined portion 31 will be described later.

[0045] The portion of the outer side wall 32 on the front side of the vehicle overlaps the rear end of the outer side wall 42 of the frame in the front side frame body 21 from the inside of the front side frame body 21.

[0046] The portion of the inner wall portion 33 on the front side of the vehicle overlaps with the rear end of the inner wall portion 43 of the frame in the front side frame body 21 from the inside of the front side frame body 21.

[0047] The portion of the outer flange 34 on the front side of the vehicle overlaps from above with the rear end of the outer flange 44 of the frame in the front side frame body 21.

[0048] The portion of the inner flange 35 on the front side of the vehicle overlaps from above with the rear end of the inner flange 45 in the front side frame body 21.

[0049] That is, the vehicle-front side portion 22a of the rear end 22 overlaps with the rear end 21a of the front side frame body 21. Hereinafter, the vehicle-front side portion 22a of the rear end 22 may also be referred to as the "front portion 22a".

[0050] Here, the rear end 22 is formed into a U-shaped cross-section with an opening at the top by means of the inclined portion 31, the outer side wall portion 32, the inner side wall portion 33, the outer side flange 34 and the inner side flange 35.

[0051] The rear end 21a of the front side frame body 21 is formed into a U-shaped cross-section with an opening at the top through the frame bottom 41, the outer side wall portion 42, the inner side wall portion 43, the outer side flange 44, and the inner side flange 45. The main part of the front side frame body 21, except for the rear end 21a, is formed into a closed cross-section.

[0052] The closed section of the front side frame body 21 is connected to the U-shaped section of the rear end 22 via the rear end 21a of the front side frame body 21. The lower front panel and floor (not shown) are connected from above to the outer flange 44 and inner flange 45 of the frame of the front side frame body 21, and the outer flange 34 and inner flange 35 of the rear end 22.

[0053] The lower front bulkhead is, for example, a panel that separates the engine compartment (power source compartment) from the passenger compartment. The floor is a panel that forms the floor portion of the passenger compartment.

[0054] <Inclined part, fixed part>

[0055] The inclined portion 31 has a bottom 51 and a protrusion 52 that protrudes upward from the bottom 51. The bottom 51 is formed to be substantially horizontal in the vehicle width direction and extends downward in a manner that slopes toward the rear of the vehicle. A fixing portion 13 is provided in the protrusion 52. In the embodiment, a cylindrical sleeve 13 is used as the fixing portion 13. Hereinafter, the fixing portion 13 may also be referred to as "sleeve 13".

[0056] Figure 5 It is along Figure 3 The cross-sectional view is obtained by cutting along the VV line.

[0057] like Figure 3 , Figure 5 As shown, the sleeve 13 is located at the center of the protrusion 52 in the vehicle width direction. The portions of the sleeve 13 on the vehicle front side and the vehicle rear side are connected to the protrusion 52 by a connecting portion 54 obtained by welding, bonding, or the like. That is, the connecting portion 54 is located on the vehicle front side and the vehicle rear side of the outer periphery 13a of the sleeve 13.

[0058] like Figures 3 to 5 As shown, the protrusion 52 extends from a position closer to the front of the sleeve 13 toward the rear of the vehicle, and the central side of the protrusion 52 in the vehicle width direction protrudes upwards from the outer side in the vehicle width direction. Specifically, the protrusion 52 has a front end portion 55, a sleeve periphery portion (near the fixing portion 13) 56 disposed at a position further rear of the front end portion 55 and surrounding the sleeve 13, and a recess 57 formed in the sleeve periphery portion 56 (see also...). Figure 6 ).

[0059] The front end portion 55 is configured such that its width W1 in the machine width direction at the front portion 22a of the rear end portion 22 is narrower than the width W2 of the sleeve-near portion 56. The reasons for making the width W1 of the front end portion 55 narrower than the width W2 of the sleeve-near portion 56 will be explained later.

[0060] Here, the front portion 22a of the rear end 22 overlaps with the rear end 21a of the front side frame body 21. Therefore, at the portion 61 where the front portion 55 of the protrusion 52 overlaps the front portion 22a of the rear end 22 and the rear end 21a of the front side frame body 21, the width W1 in the vehicle width direction is narrower than the width W2 of the sleeve near portion 56.

[0061] Hereinafter, the portion 61 that overlaps the front portion 22a of the rear end 22 with the rear end 21a of the front side frame body 21 is sometimes referred to as the "overlapping portion 61".

[0062] A sleeve-near portion 56 is connected to the end 55a on the rear side of the front end 55. The sleeve-near portion 56 extends from the end 55a on the rear side of the front end 55 toward the rear of the vehicle.

[0063] The sleeve proximity portion 56 extends outward in the vehicle width direction relative to the sleeve 13. The sleeve 13 is located at the center of the protrusion 52 (specifically, the sleeve proximity portion 56) in the vehicle width direction. The front end portion 55 and the central side of the sleeve proximity portion 56 in the vehicle width direction protrude upwards than the outer side in the vehicle width direction. Therefore, the sleeve 13 is located at the top 56a of the sleeve proximity portion 56.

[0064] Furthermore, the sleeve 13 is connected to the top 56a of the sleeve proximity portion 56 via connecting portions 54 provided at the vehicle front side and vehicle rear side of the outer periphery 13a. Therefore, the connecting portions 54 at the vehicle front side and vehicle rear side can be provided at the top 56a of the sleeve proximity portion 56.

[0065] The reasons for placing the sleeve 13 at the top 56a of the sleeve proximity portion 56 and the connecting portion 54 at the top 56a of the sleeve proximity portion 56 will be explained later.

[0066] Figure 6 It is along Figure 3 The sectional view is obtained by cutting along the VI-VI line.

[0067] like Figure 3 , Figure 6 As shown, the recess 57 is disposed at the front of the vehicle relative to the sleeve 13 and is formed in a downward recessed manner. The recess 57 has a recessed bottom surface 58 forming the bottom of the recess 57. The recessed bottom surface 58 is formed above the bottom 51 of the inclined portion 31. The recessed bottom surface 58 is formed, for example, at approximately the same height as the connecting portion 54.

[0068] It should be noted that, in this embodiment, the example in which the recess 57 is formed in the sleeve near portion 56 is described, but the recess 57 may also be formed in both the sleeve near portion 56 and the front portion 55 (i.e., the protrusion 52). The reason for providing the recess 57 in the front of the sleeve 13 will be explained in detail later.

[0069] As explained above, in the vehicle front structure 10 of the embodiment, such as Figures 3 to 5 As shown, a protrusion 52 is formed on the inclined portion 31 at the rear end 22, and the protrusion 52 protrudes upward from the bottom 51. Furthermore, the protrusion 52 extends from a position closer to the front of the vehicle than the sleeve 13 toward the rear of the vehicle. In addition, the central side of the protrusion 52 in the vehicle width direction protrudes upward from the outer side in the vehicle width direction.

[0070] Here, the closed section of the front side frame body 21 connects to the U-shaped section of the rear end 22 via the rear end 21a of the front side frame body 21. Therefore, for example, consider water flowing from the front side frame body 21 into the inclined portion 31 of the rear end 22 as shown by arrow A. A protrusion 52 is provided at the inclined portion of the rear end 22.

[0071] As a result, water flowing into the rear end 22 as indicated by arrow A can bypass the protrusion 52 and flow towards the bottom 51 as indicated by arrow B. Thus, water flowing into the rear end 22 can bypass the sleeve 13 and flow. Therefore, for example, water accumulation at the connection 54 where the sleeve 13 connects to the protrusion 52 can be prevented, and deterioration of the connection 54 due to rust or the like can be suppressed.

[0072] In addition, for example, sleeve 13 is connected to protrusion 52 by welding, bonding or other means.

[0073] In particular, when the sleeve 13 is connected to the protrusion 52 by welding, there is a possibility that the welded connection 54 may deteriorate due to rusting or other factors.

[0074] Therefore, the sleeve-near portion 56 of the protrusion 52 is extended outward relative to the sleeve 13 in the vehicle width direction. As a result, water flowing into the inclined portion 31 of the rear end 22 as shown by arrow A is less likely to flow into the connecting portion 54. Thus, water accumulation in the connecting portion 54 can be prevented, and deterioration of the connecting portion 54 due to rust or the like can be suppressed.

[0075] Furthermore, connecting portions 54 are provided on the vehicle front side and vehicle rear side of the outer periphery 13a of the sleeve 13. Therefore, for example, compared to the case where the connecting portions 54 are provided in the vehicle width direction, it is possible to suppress the expansion of the width of the protrusion 52 in the vehicle width direction. As a result, the width in the vehicle width direction can be smoothly expanded from the front end 55 of the protrusion 52 to the near part 56 of the sleeve, and the stagnation of water flow in the width expansion part in the vehicle width direction can be suppressed.

[0076] Furthermore, the connecting portion 54 on the front side of the vehicle and the connecting portion 54 on the rear side of the vehicle can be provided at the top 56a of the sleeve near portion 56. As a result, it is possible to better prevent water flowing into the rear end 22 as shown by arrow A from accumulating in the connecting portion 54.

[0077] Furthermore, the front end portion 55 of the protrusion 52 is located at the front portion 22a of the rear end portion 22, and the width W1 of the front end portion 55 in the vehicle width direction is made narrower than that of the sleeve-near portion 56. Therefore, water flowing into the rear end portion 22 as shown by arrow A can be reliably guided through the front end portion 55 to the bottom 51 located outside the front end portion 55 in the vehicle width direction, as shown by arrow B. As a result, water flowing into the rear end portion 22 can bypass the sleeve 13 and flow.

[0078] Conversely, for example, if the width of the front end in the vehicle width direction is widened, there is a possibility that water flowing into the rear end 22, as shown by arrow A, may flow over the front end and onto the upper surface of the protrusion. Therefore, there is a possibility that water may accumulate in the connecting part 54, causing the connecting part 54 to deteriorate due to rust or other reasons.

[0079] Furthermore, the width W1 of the front end 55 is made narrow at the front portion 22a of the rear end 22. Therefore, the width of the bottom 51 can be ensured to be wide at the front portion 22a of the rear end 22. Therefore, welding space, such as for spot welding, can be ensured at the front portion 22a of the rear end 22.

[0080] Thus, for example, the bottom 51 of the inclined portion 31 is securely connected to the bottom 41 of the frame of the front side frame body 21 via a connecting portion 65 obtained by welding at the front portion 22a of the rear end 22. Therefore, the rigidity of the rear end 22 can be ensured, and components such as the sleeve 13 and the lower arm 16 can be securely fixed to the inclined portion 31 of the rear end 22.

[0081] Furthermore, at the overlap 61 where the front portion 22a of the rear end 22 overlaps with the rear end 21a of the front side frame body 21, the width W1 of the front end 55 is made narrower than the width W2 of the sleeve-near portion 56. Therefore, at the overlap 61, the width of the bottom 51 can be ensured to be wide. Thus, the front portion 22a of the rear end 22 (especially the inclined portion 31) and the rear end 21a of the front side frame body 21 can be connected by welding operations such as spot welding without being obstructed by the protrusion 52. Therefore, welding-based workability can be improved, and components such as the sleeve 13 and lower arm 16 can be securely fixed to the inclined portion.

[0082] like Figure 3 , Figure 6 As shown, the inclined portion 31 of the rear end 22 is formed uphill from the sleeve 13 toward the front of the vehicle. Therefore, the sleeve perimeter portion 56 is also formed uphill from the sleeve 13 toward the front of the vehicle. In this case, when the sleeve 13 is connected to the sleeve perimeter portion 56 by welding such as MIG welding, there is a possibility that the sleeve perimeter portion 56 may become an obstruction to the operation of the equipment used for MIG welding (e.g., nozzle, metal electrode rod, etc.).

[0083] Therefore, a recess 57 is provided at the sleeve proximity portion 56 in front of the sleeve 13 on the vehicle side, and the recess 57 is recessed downward. Therefore, when the outer periphery 13a of the sleeve 13 (especially the part on the front side of the vehicle side) is connected to the sleeve proximity portion 56 by welding such as MIG welding, welding operations can be performed without the MIG welding equipment being obstructed by the sleeve proximity portion 56.

[0084] Therefore, when the outer periphery 13a of the sleeve 13 is connected to the sleeve vicinity 56 by welding, the workability based on welding can be improved.

[0085] Alternatively, the recess 57 can be formed on both the sleeve near portion 56 and the front portion 55 (i.e., the protrusion 52) in accordance with the size of the welding equipment.

[0086] It should be noted that the technical scope of the present invention is not limited to the described embodiments, and various modifications can be made without departing from the spirit of the present invention.

[0087] In addition, without departing from the spirit of the present invention, the constituent elements in the embodiments can be appropriately replaced with well-known constituent elements, and the modified examples can also be appropriately combined.

Claims

1. A front structure for a vehicle, wherein, The front structure of the vehicle includes: The rear end, which forms the rear part of the front side frame, has a sloping part that slopes downward toward the rear of the vehicle. A fixing part, which is disposed on the inclined part; and The lower arm supports the suspension and is connected to the fixed part. The inclined portion has: The bottom slopes downwards towards the rear of the vehicle; and The protrusion extends upwards from the bottom. The protrusion extends from a position closer to the front of the vehicle than the fixed part towards the rear of the vehicle, and the central side of the protrusion in the vehicle width direction protrudes upwards than the outer side of the protrusion in the vehicle width direction. The protrusion has a front end portion whose width in the vehicle width direction at the vehicle front side of the rear end is narrower than that near the fixing portion. The rear end extends from the rear end of the main body of the front side frame in the front side frame in a downwardly inclined manner toward the rear of the vehicle. The main body of the front side frame extends from the front of the vehicle toward the rear of the vehicle. The width of the protrusion in the vehicle width direction at the location where it overlaps the rear end and the front side frame body is narrower than that near the fixing part.

2. The vehicle front structure according to claim 1, wherein, The fixing part is a sleeve that is connected to the protrusion on its outer periphery. The protrusion extends outward relative to the sleeve in the vehicle width direction.

3. The vehicle front structure according to claim 2, wherein, The vehicle-front portion and the vehicle-rear portion of the outer periphery of the sleeve are connected to the protrusion via a connecting portion.

4. The vehicle front structure according to claim 1, wherein, The protrusion has a recess that is located at the front of the vehicle and is recessed downward relative to the fixing part.

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