Front body structure

Abstract

The present invention provides a vehicle body front structure that can take into account both collision performance and space efficiency. The vehicle body front structure (1) includes: a pair of left and right front pillars (2, 2); a front wall portion (31) arranged between the pair of left and right front pillars (2, 2) to constitute the front end of the vehicle compartment; a lower wall portion (32) extending rearward from the lower end of the front wall portion (31); a channel component (40) formed in the middle portion of the lower wall portion (32) in the vehicle width direction and convex upward; and a reinforcement portion stacked and fixed to the front wall portion (31) or the front wall portion (31) and the lower wall portion (32), the reinforcement portion being arranged in a manner of being inclined downward from the front pillar (2) toward the channel component (40), and constituting a thick plate portion by cooperating with the front wall portion (31) or the front wall portion (31) and the lower wall portion (32).

Description

Technical Field

[0001] The invention relates to a vehicle body front structure. Background Art

[0002] In recent years, as cars have become smaller, there has been a trend of increasing the number of components mounted in the engine compartment due to the addition of advanced functions, and there is a further demand for technology to suppress deformation of the vehicle body in response to high-speed oblique front collisions and the like. Patent documents 1 and 2 describe a structure in which a frame member such as a dash cross member is arranged on the lower instrument panel member that divides the engine compartment and the vehicle compartment. This structure can generate a reaction force against the intrusion of the mounted components in the engine compartment during a frontal collision of the vehicle, thereby suppressing the deformation of the lower instrument panel member toward the vehicle compartment.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 59-96067

[0006] Patent Document 2: Japanese Patent Application Publication No. 2009-286181 Summary of the invention

[0007] Problems to be solved by the invention

[0008] However, the structure in which the frame members are arranged as described in Patent Document 1 requires a space for forming a closed cross section, and therefore may not be applicable to a compact vehicle.

[0009] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle body front structure capable of achieving both collision performance and space efficiency.

[0010] Means for solving problems

[0011] In order to solve the aforementioned problems, the front vehicle body structure of the present invention is characterized in that it includes: a pair of left and right front pillars; a front wall portion, which is arranged between the pair of left and right front pillars and constitutes the front end portion of the vehicle cabin; a floor wall portion, which is extended rearward from the lower end portion of the front wall portion; a tunnel portion, which is formed in the middle portion of the floor wall portion in the vehicle width direction and is convex upward; a reinforcement portion, which is stacked on the front wall portion or the front wall portion and the floor wall portion and fixed, and the reinforcement portion is arranged in a manner of being inclined downward from the front pillar toward the tunnel portion, and constitutes a thick plate portion by cooperating with the front wall portion or the front wall portion and the floor wall portion.

[0012] Effects of the Invention

[0013] According to the present invention, it is possible to achieve both collision performance and space efficiency in the vehicle body front structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a rear view schematically showing the vehicle body front structure according to the embodiment of the present invention.

[0015] Figure 2 It is a perspective view schematically showing a vehicle body front structure according to an embodiment of the present invention.

[0016] Figure 3 yes Figure 1 A partial enlarged view of .

[0017] Figure 4 It is a perspective view schematically showing a tunnel portion of the vehicle body front structure according to the embodiment of the present invention.

[0018] Figure 5 It is an end view schematically showing a vehicle body front structure according to an embodiment of the present invention.

[0019] Description of Reference Numerals

[0020] 1 Front structure of the vehicle

[0021] 2 Front Pillar

[0022] 3 Front side frame

[0023] 10 Front frame lower part

[0024] 20 Front frame upper part

[0025] 30 Instrument panel lower part

[0026] 30a Hole

[0027] 31 front wall

[0028] 32 lower wall portion (bottom wall portion)

[0029] 33 Wheel arch

[0030] 40 channel component (channel part)

[0031] 41 Upper wall

[0032] 42 side wall

[0033] 50 First reinforcement plate (wheel arch side reinforcement plate, reinforcement part, thick plate part)

[0034] 51 Anterior wall reinforcement

[0035] 52 Lower wall reinforcement

[0036] 53 Wheel arch reinforcement

[0037] 53a Fixed part

[0038] 53b Notch

[0039] 54 Flat surface

[0040] 60 Second reinforcement plate (channel side reinforcement plate, reinforcement part, thick plate part)

[0041] 61 Lower wall reinforcement (lower wall)

[0042] 62 channel reinforcement (side wall)

[0043] 70 channel bracket (channel reinforcement plate)

[0044] 80 channel reinforcement (channel reinforcement plate)

[0045] 90 Steering joint cover

[0046] 100 Bracket DETAILED DESCRIPTION

[0047] Hereinafter, the embodiment of the present invention will be described with reference to appropriate drawings, taking the case where the vehicle body front structure of the present invention is applied to an automobile as an example. The same reference numerals are given to the same components and repeated descriptions are omitted. Terms indicating directions such as up and down, front and back, left and right (vehicle width direction) are based on the vehicle and the occupant (driver) of the vehicle.

[0048] like Figure 1 and Figure 2 As shown, the vehicle body front structure 1 according to the embodiment of the present invention includes a pair of left and right front pillars 2, 2, a pair of left and right front side frames 3, 3, a dashboard lower member 30, and a tunnel member 40. In addition, the vehicle body front structure 1 includes a first reinforcement plate 50, a second reinforcement plate 60, a tunnel brace 70, and a tunnel reinforcement 80 (see Figure 4 ). In addition, the vehicle body front structure 1 includes a steering joint cover 90, a bracket 100, and a pair of left and right reinforcing plates 110, 110. The vehicle body front structure 1 is a structure in which the instrument panel lower member 30 is reinforced by a reinforcing portion composed of a first reinforcing plate 50 and a second reinforcing plate 60 between the tunnel member 40 and one (the left side in this embodiment) front pillar 2.

[0049] <Front pillar>

[0050] like Figure 2 As shown, the front pillar 2 is a metal frame member extending in the up-down direction. The front pillar 2 has a substantially rectangular cross-sectional shape when viewed from above, and constitutes a front frame portion of the vehicle body side with a door opening. In addition, the upper portion of the front pillar 2 constitutes the left and right side frame portions of the vehicle body front with a front windshield opening. The lower end of the front pillar 2 is connected to a metal lower longitudinal beam 4 extending in the front-to-back direction as a frame member. The upper end of the front pillar 2 is connected to a metal roof side rail extending in the front-to-back direction as a frame member.

[0051] <Front side frame>

[0052] The front side frame 3 is a metal frame member extending in the front-to-back direction at the lower part of the vehicle body. The front side frame 3 has a substantially rectangular cross-sectional shape when viewed from the front. The front end of the front side frame 3 is connected to the bumper at the front of the vehicle body. The front side frame 3 includes: a front side frame lower member 10 constituting the lower part of the front side frame 3; and a front side frame upper member 20 constituting the upper part of the front side frame 3.

[0053] 《Front side frame lower parts》

[0054] The front frame lower member 10 is integrally provided with: a lower wall portion 11; an inner wall portion 12 extending upward from the inner end portion of the lower wall portion 11 in the vehicle width direction; and an outer wall portion 13 extending upward from the outer end portion of the lower wall portion 11 in the vehicle width direction. In addition, the front frame lower member 10 is integrally provided with: a flange portion 14 extending inwardly in the vehicle width direction from the upper end portion of the inner wall portion 12; and a flange portion 15 extending outwardly in the vehicle width direction from the upper end portion of the outer wall portion 13. The front frame lower member 10 is extended forward to the lower side of the lower wall reinforcement portion 52 and the front side of the front wall reinforcement portion 51 in the first reinforcement plate 50 described later.

[0055] 《Front side frame upper parts》

[0056] The front side frame upper member 20 is integrally provided with: an upper wall portion 21; an inner wall portion 22 extending downward from the inner end portion of the upper wall portion 21 in the vehicle width direction; and an outer wall portion 23 extending downward from the outer end portion of the upper wall portion 21 in the vehicle width direction. In addition, the front side frame upper member 20 is integrally provided with: a flange portion 24 extending inwardly in the vehicle width direction from the lower end portion of the inner wall portion 22; and a flange portion 25 extending outwardly in the vehicle width direction from the lower end portion of the outer wall portion 23. The front side frame upper member 20 is extended forward to the rear end portion of the lower wall reinforcement portion 52 of the first reinforcement plate 50 described later.

[0057] The front side frame lower member 10 and the front side frame upper member 20 sandwich and connect the lower wall portion 32 of the instrument panel lower member 30 described later from the upper and lower directions. That is, the flange portion 14, the lower wall portion 32 and the flange portion 24 are joined by welding or the like, and the flange portion 15, the lower wall portion 32 and the flange portion 25 are joined by welding or the like.

[0058] <Instrument panel lower part>

[0059] The instrument panel lower member 30 is a metal plate-shaped member that is mounted between the lower portions of the pair of left and right front pillars 2, 2. The instrument panel lower member 30 integrally includes: a front wall portion 31 that extends in the vertical direction and the left and right direction; a lower wall portion (bottom wall portion) 32 that extends rearward from the lower end portion of the front wall portion 31; and wheel arch portions 33, 33.

[0060] Front Wall

[0061] The front wall portion 31 defines a power source room (engine room) formed on the front side of the front wall portion 31 and a vehicle room formed on the rear side of the front wall portion 31 .

[0062] 《Lower wall (bottom wall)》

[0063] The lower wall portion 32 constitutes the front end of the bottom surface of the vehicle compartment. The front end of the lower wall portion 32 is bent in an R-shaped manner that bulges downward when viewed from the side. The bent portion is the boundary portion with the front wall portion 31 and can also be regarded as the lower end of the front wall portion 31. The lower wall portion 32 is divided into two left and right parts in the center portion in the vehicle width direction. A flange portion 32a extending upward is formed at the inner end in the vehicle width direction of the lower wall portion 32 divided into the left and right parts.

[0064] Wheel arch

[0065] The wheel arches 33 are formed at both ends of the instrument panel lower member 30 in the vehicle width direction so as to straddle the front wall 31 and the lower wall 32. The wheel arches 33 constitute the rear part of the wheel housings for accommodating the left and right front wheels of the vehicle and are recessed rearward and inward in the vehicle width direction in a 1 / 4 spherical shape.

[0066] <Channel parts>

[0067] The tunnel member 40 is a metal plate-shaped member that is installed between the lower wall portions 32, 32 divided into two parts on the left and right sides and extends in the front-rear direction. The front end of the tunnel member 40 is connected to the front wall portion 31 via the reinforcing plate 110. The tunnel member 40 is integrally provided with an upper wall portion 41 and side wall portions 42, 42 that extend downward from both ends of the upper wall portion 41 in the vehicle width direction. The lower end of the side wall portion 42 is joined to the corresponding flange portion 32a by welding or the like.

[0068] <First reinforcement plate (wheel arch side reinforcement plate)>

[0069] like Figure 3As shown, the first reinforcing plate 50 is a metal plate-shaped member that reinforces the wheel arch portion 33 side (outside in the vehicle width direction) of the instrument panel lower member 30 in the vehicle width direction. The first reinforcing plate 50 is roughly rectangular in shape when viewed from the back, and is stacked on the vehicle compartment side of the instrument panel lower member 30 (the rear side of the front wall portion 31 and the wheel arch portion 33, and the upper side of the lower wall portion 32). The first reinforcing plate 50 is not a skeleton member that cooperates with the instrument panel lower member 30 to form a closed cross section, but a member that constitutes a pressure plate portion, which is stacked on the instrument panel lower member 30 and fixed at multiple locations, and has a thickness greater than that of the instrument panel lower member 30 where the first reinforcing plate 50 is not provided. The first reinforcing plate 50 integrally includes: a front wall reinforcing portion 51, which is stacked on the front wall portion 31 and joined by welding or the like; and a lower wall reinforcing portion 52, which is stacked on the lower wall portion 32 and joined by welding or the like. In addition, the first reinforcement plate 50 integrally includes: a wheel arch reinforcement portion 53 which is stacked on the wheel arch portion 33 and joined by welding or the like; and a plane portion 54 which is provided at the intersection of each reinforcement portion 51 to 53. The boundary portions of the wheel arch reinforcement portion 53, the front wall reinforcement portion 51, and the lower wall reinforcement portion 52 form a ridgeline in a substantially Y shape, and the plane portion 54 is located at the intersection of the ridgeline.

[0070] The flat surface portion 54 is provided across the respective reinforcement portions 51 to 53 and has a triangular shape. The flat surface portion 54 is inclined so as to face upward as it goes outward in the vehicle width direction, and is inclined so as to face downward as it goes rearward.

[0071] The lower wall reinforcement 52 is bent to form a front frame upper member 55 that protrudes upward from the lower wall reinforcement 52. The front frame upper member 55 is a portion that extends forward from the front end of the front frame upper member 20 to constitute the upper portion of the front frame 3. The front frame upper member 55 integrally includes: a pair of left and right side wall portions 55a, 55a extending upward from the lower wall reinforcement 52; and an upper wall portion 55b that connects the upper ends of the pair of left and right side wall portions 55a, 55a.

[0072] <Second reinforcement plate (channel side reinforcement plate)>

[0073] like Figure 4As shown, the second reinforcing plate 60 is a metal plate-shaped member that reinforces the tunnel member 40 side (inside in the vehicle width direction) of the instrument panel lower member 30. The second reinforcing plate 60 is substantially rectangular in shape when viewed from the back, and is arranged to be offset downward relative to the first reinforcing plate 50. In the present embodiment, it is provided on the power source chamber side (the lower side of the lower wall portion 32) of the instrument panel lower member 30. The second reinforcing plate 60 is not a frame member that cooperates with the instrument panel lower member 30 and forms a closed cross section, but a member that forms a pressure plate portion, which is laminated on the instrument panel lower member 30 and fixed at multiple locations, and has a greater thickness than the portion of the instrument panel lower member 30 where the second reinforcing plate 60 is not provided. The second reinforcing plate 60 integrally includes: a lower wall reinforcing portion 61 laminated on the lower wall portion 32 and joined by welding or the like; and a tunnel reinforcing portion 62 laminated on the side wall portion 42 of the tunnel member 40 and joined by welding or the like. The vehicle width direction outer end portion of the lower wall reinforcement portion 61 is joined to the lower wall reinforcement portion 52 of the first reinforcing plate 50 via the lower wall portion 32 by welding or the like, on the vehicle width direction inner side of the front side frame 3 .

[0074] The second reinforcing plate 60 is smaller than the first reinforcing plate 50. The second reinforcing plate 60 is formed to have a higher strength per unit area against a front collision load than the first reinforcing plate 50, and as described later, the second reinforcing plate 60 is connected to the steering joint cover 90. That is, the second reinforcing plate 60 whose area is reduced by being connected to the steering joint cover 90 suppresses deformation of the instrument panel lower member 30 toward the rear or toward the rear in the vehicle width direction, and is therefore formed of a plate (high-strength steel plate) having a higher strength than the first reinforcing plate 50. According to this configuration, the second reinforcing plate 60 and the steering joint cover 90 work in cooperation, thereby being able to achieve the same strength as the first reinforcing plate 50 against a front collision load.

[0075] <Tunnel support (tunnel reinforcement plate)>

[0076] The tunnel bracket 70 is a metal plate-shaped member for reinforcing the tunnel member 40. The tunnel bracket 70 is stacked on the outer side (lower surface) of the tunnel member 40. The tunnel bracket 70 integrally includes an upper wall portion 71 and side wall portions 72, 72 extending downward from both ends of the upper wall portion 71 in the vehicle width direction. The upper wall portion 71 is joined to the upper wall portion 41 of the tunnel member 40 by welding or the like, and the side wall portion 72 is joined to the side wall portion 42 of the tunnel member 40 by welding or the like. The lower end of one side wall portion 72 is sandwiched by the upper end of the tunnel reinforcement portion 62 of the second reinforcing plate 60 and the side wall portion 42 of the tunnel member 40, and is joined thereto by welding or the like.

[0077] <Tunnel reinforcement (tunnel reinforcement plate)>

[0078] The tunnel reinforcement 80 is a metal plate-shaped member that is extended in the front-rear direction at the rear side of the tunnel bracket 70 and reinforces the corner of the tunnel member 40. The tunnel reinforcement 80 is stacked on the outer side of the vehicle interior across the upper wall portion 41 and the side wall portion 42 of the tunnel member 40, and is divided into two left and right parts. The tunnel reinforcement 80 integrally includes an upper wall portion 81 and a side wall portion 82 that extends downward from the end portion of the upper wall portion 81 in the vehicle width direction. The front end portion of the upper wall portion 81 is sandwiched by the upper wall portion 71 of the tunnel bracket 70 and the upper wall portion 41 of the tunnel member 40, and is joined thereto by welding or the like. The front end portion of the side wall portion 82 is sandwiched by the side wall portion 72 of the tunnel bracket 70 and the side wall portion 42 of the tunnel member 40, and is joined thereto by welding or the like.

[0079] <Steering joint cover>

[0080] The steering joint cover 90 is a metal component laminated on the power source chamber side of the front wall portion 31 in a manner surrounding the hole portion 30a. The steering joint cover 90 is a component that covers and protects the steering joint inserted in the hole portion 30a. The lower end of the steering joint cover 90 is sandwiched by the second reinforcing plate 60 and the lower wall portion 32 and joined thereto by welding or the like. The hole portion 30a is formed in a manner spanning the front wall portion 31 and the lower wall portion 32, but may be formed in either the front wall portion 31 or the lower wall portion 32.

[0081] <Bracket>

[0082] The bracket 100 is provided on the vehicle compartment side of the lower wall 32 to restrict the trajectory (movement direction and movement range (movement limit in the stepping direction)) of the accelerator pedal operated by the driver. The bracket 100 is joined to the lower wall 32 and the second reinforcing plate 60 stacked thereon by welding or the like.

[0083] <Reinforcement plate>

[0084] The reinforcing plate 110 is provided on the vehicle compartment side of the front wall portion 31, and is a metal plate-shaped member that reinforces the periphery of the connection portion of the tunnel member 40 in the front wall portion 31. The reinforcing plate 110 integrally includes a main wall portion 111 and a flange portion 112 extending rearward from the lower end portion of the main wall portion 111, and is divided into two left and right parts. The main wall portion 111 is joined to the front wall portion 31 and the steering joint cover 90 by welding or the like, and the flange portion 112 is joined to the front end portion of the upper wall portion 41 of the tunnel member 40 by welding or the like.

[0085] <Deformation suppression of the lower instrument panel member during a frontal collision>

[0086] When the vehicle is in a frontal collision, the mounted components (e.g., a transmission) installed in the power source room abut against the lower end of the instrument panel lower member 30 (the region from the lower end of the front wall 31 to the curved portion of the lower wall 32). Here, the first reinforcing plate 50 and the second reinforcing plate 60 form a downwardly inclined region from the front pillar 2 to the tunnel member 40 (see FIG. Figure 1 and Figure 2 The reinforcing portion is a reinforcing portion of the front pillar 2 and the channel member 40, and forms a thick-walled portion by cooperating with the lower instrument panel member 30. Therefore, the reinforcing portion can suppress the lower instrument panel member 30 from deforming rearward. The curved portion of the lower wall portion 32 is the footrest of the occupant, and therefore, the reinforcing portion can eliminate the influence on the ankles of the occupant. In addition, the reinforcing portion can achieve space saving compared with the skeleton portion. In addition, in the case where a mounted component (for example, a brake master cylinder) collides with the front wall portion 31 above the front wall reinforcement portion 51, the front vehicle body structure 1 can disperse the collision load from the front wall reinforcement portion 51 to the stress of the lower wall reinforcement portion 52 and the wheel arch reinforcement portion 53, and can suppress, for example, the retreat of the brake pedal.

[0087] The vehicle body front structure 1 of the embodiment of the present invention includes: a pair of left and right front pillars 2, 2; a front wall portion 31, which is arranged between the pair of left and right front pillars 2, 2 and constitutes the front end portion of the vehicle cabin; a floor wall portion (lower wall portion 32), which is extended rearward from the lower end portion of the front wall portion 31; a tunnel portion (channel component 40), which is formed in the middle portion of the floor wall portion in the vehicle width direction and is convex upward; and a reinforcement portion, which is stacked on the front wall portion 31 or the front wall portion 31 and the floor wall portion and fixed, and the reinforcement portion is arranged in a manner of being inclined downward from the front pillar 2 toward the tunnel portion, and constitutes a thick plate portion by cooperating with the front wall portion 31 or the front wall portion 31 and the floor wall portion.

[0088] Therefore, the vehicle body front structure 1 can achieve both collision performance and space efficiency by increasing the strength of the front wall 31 without using a frame member. The vehicle body front structure 1 can be preferably applied to vehicles that have limited space for both the power source room (engine room) and the vehicle room (cabin).

[0089] Furthermore, in the vehicle body front structure 1, the reinforcement portion is formed by a plurality of reinforcement plates arranged in the vehicle width direction.

[0090] Therefore, the vehicle body front structure 1 can improve productivity by dividing the reinforcement portion into a plurality of reinforcement plates. In addition, the vehicle body front structure 1 can appropriately realize a thick plate portion inclined downward by disposing adjacent reinforcement plates in an offset manner so as to become the lower side as it goes inward in the vehicle width direction.

[0091] In addition, the vehicle body front structure 1 includes a wheel arch portion 33 formed at the vehicle width direction end portions of the front wall portion 31 and the floor wall portion, and the reinforcement portion includes: a wheel arch side reinforcement plate (first reinforcement plate 50), which is arranged on the side of the wheel arch portion 33 to reinforce the wheel arch portion 33; and a tunnel side reinforcement plate (second reinforcement plate 60), which is arranged on the side of the tunnel portion.

[0092] Therefore, the vehicle body front structure 1 can improve productivity by dividing the wheel arch side reinforcement plate corresponding to the wheel arch portion 33 with a relatively complex shape from the tunnel side reinforcement plate. In addition, the vehicle body front structure 1 can achieve more appropriate collision performance by setting the wheel arch side reinforcement plate having a wide protection range against collision to be larger than the tunnel side reinforcement plate.

[0093] In addition, the vehicle body front structure 1 includes a front side frame 3, which is arranged between the front pillar 2 and the tunnel portion and extends in the front-to-rear direction at least on the lower side of the floor wall portion. The wheel arch side reinforcement plate is arranged on the rear side of the wheel arch portion 33 and the front wall portion 31 and on the upper side of the floor wall portion in a manner spanning the front side frame 3, and the tunnel side reinforcement plate is arranged on the lower side of the floor wall portion. The wheel arch side reinforcement plate and the tunnel side reinforcement plate are connected to each other inward in the vehicle width direction compared with the front side frame 3.

[0094] Therefore, the vehicle body front structure 1 can appropriately connect the wheel arch side reinforcement plate and the tunnel side reinforcement plate avoiding the front side frame 3. In addition, the vehicle body front structure 1 sets the connection portion inward (near) in the vehicle width direction compared with the front side frame 3, so that even if the wheel arch side reinforcement plate is set large, the wheel arch side reinforcement plate can be fixed to the front side frame 3, and the collision load acting on the connection portion can be reduced.

[0095] In addition, in the vehicle body front structure 1 , the wheel arch side reinforcement plate is stacked on the front wall portion 31 , the floor wall portion, and the wheel arch portion 33 .

[0096] Therefore, the wheel arch side reinforcement of the vehicle body front structure 1 forms a substantially Y-shaped ridge line, and the strength of the wheel arch side reinforcement against a collision (frontal collision) can be increased.

[0097] In addition, in the vehicle body front structure 1 , the wheel arch side reinforcement plate has a flat surface portion 54 at a location corresponding to an intersection of the front wall portion 31 , the floor wall portion, and the wheel arch portion 33 .

[0098] Therefore, the vehicle front structure 1 can suppress the formation of wrinkles and appropriately ensure the strength of the wheel arch side reinforcement plate against collision. In addition, when the mounted component collides above the front wall reinforcement 51, the vehicle front structure 1 can disperse the collision load from the front wall reinforcement 51 to the lower wall reinforcement 52 and the wheel arch reinforcement 53.

[0099] In addition, in the vehicle body front structure 1, the channel side reinforcement plate includes: a lower wall portion (lower wall reinforcement portion 61), which is along the floor wall portion; and a side wall portion (channel reinforcement portion 62), which is extended upward from the inner end portion of the lower wall portion in the vehicle width direction, and the side wall portion (channel reinforcement portion 62) is fixed to the channel portion.

[0100] Therefore, when the vehicle is involved in a frontal collision, the vehicle body front structure 1 can appropriately transmit the collision load to the tunnel portion.

[0101] Furthermore, the vehicle body front structure 1 includes a tunnel reinforcement plate (tunnel brace 70 , tunnel reinforcement 80 ) stacked inside the tunnel of the tunnel portion, and the side wall portion 62 of the tunnel side reinforcement plate is fixed to the tunnel reinforcement plate.

[0102] Therefore, during a frontal collision of the vehicle, the vehicle body front structure 1 can appropriately transmit the collision load to the tunnel portion while suppressing deformation of the tunnel portion.

[0103] In addition, in the vehicle front structure 1, a hole portion 30a for inserting a steering joint is formed in at least one of the front wall portion 31 and the floor wall portion 32, and the vehicle front structure 1 includes a steering joint cover 90, which is stacked on at least one of the front wall portion 31 and the floor wall portion 32 in a manner surrounding the hole portion 30a, and the channel side reinforcement plate is higher in strength than the wheel arch side reinforcement plate.

[0104] Therefore, the tunnel side reinforcement plate of the vehicle body front structure 1 has higher strength than the wheel arch side reinforcement plate, so even if the tunnel side reinforcement plate is reduced in size by providing the steering joint cover 90, the same strength as the wheel arch side reinforcement plate can be ensured. Thus, the strength against collision (vehicle front collision) can be improved.

[0105] Furthermore, the vehicle body front structure 1 includes a bracket 100 that is fixed to the tunnel side reinforcement plate and regulates the trajectory of the accelerator pedal.

[0106] Therefore, since the bracket 100 is fixed to the tunnel side reinforcement plate having a relatively high strength, the vehicle body front structure 1 can reliably deform the bracket 100 to appropriately protect the occupant (ankle) during a frontal collision of the vehicle.

[0107] In the vehicle body front structure 1, at the vehicle width direction end of the wheel arch side reinforcement, a fixing portion 53a fixed to the front pillar 2 and a notch portion 53b separated from the front pillar 2 below the fixing portion 53a are formed.

[0108] Therefore, the vehicle body front structure 1 can reduce the weight of the wheel arch side reinforcement and appropriately realize the thick plate portion that is inclined downward.

[0109] The embodiments of the present invention are described above, but the present invention is not limited to the aforementioned embodiments and can be appropriately deformed within the scope of the gist of the present invention. For example, the second reinforcing plate 60 can also be joined to the side wall portion 82 of the tunnel reinforcement 80 by welding, etc., instead of the tunnel bracket 70. In addition, the reinforcing portion (the first reinforcing plate 50 and the second reinforcing plate 60) can also be a structure that is only stacked and fixed to one of the front wall portion 31 and the lower wall portion 32 and is not stacked on the other of the front wall portion 31 and the lower wall portion 32. In addition, the reinforcing portion can also be divided into three or more in the vehicle width direction. In addition, the reinforcing portion can be joined to either the left or right side of the lower instrument panel component 30.

Claims

1. A vehicle body front structure, characterized in that: include: A pair of left and right front columns; A front wall portion, which is disposed between the pair of left and right front pillars and constitutes a front end portion of the vehicle compartment; A floor wall portion extending rearward from a lower end portion of the front wall portion; A tunnel portion formed in a middle portion of the floor wall portion in the vehicle width direction and convex upward; as well as a reinforcing portion which is laminated and fixed to the front wall portion or the front wall portion and the floor wall portion, The reinforcement portion is provided in a manner of being inclined downward from the front pillar toward the tunnel portion, and constitutes a thick plate portion by cooperating with the front wall portion or the front wall portion and the floor wall portion. The invention further comprises a wheel arch portion formed at the end portions of the front wall portion and the floor wall portion in the vehicle width direction. The reinforcement portion includes: a wheel arch side reinforcement plate, which is arranged on the side of the wheel arch portion to reinforce the wheel arch portion; and a channel side reinforcement plate, which is arranged on the channel portion side, A hole for inserting a steering joint is formed in at least one of the front wall and the floor wall. The vehicle body front structure includes a steering joint cover, the steering joint cover being stacked on at least one of the front wall portion and the floor wall portion so as to surround the hole portion. The lower end of the steering joint cover is sandwiched by the tunnel side reinforcement plate and the lower wall portion of the front end portion constituting the bottom surface portion of the vehicle compartment. The tunnel side reinforcement plate has higher strength than the wheel arch side reinforcement plate.

2. The vehicle body front structure according to claim 1, characterized in that: The reinforcement portion is formed by a plurality of reinforcement plates arranged in a vehicle width direction.

3. The vehicle body front structure according to claim 1, characterized in that: A front side frame is provided between the front pillar and the tunnel portion and is extended in the front-rear direction at least on the lower side of the floor wall portion. The wheel arch side reinforcement plate is provided on the rear side of the wheel arch portion, the rear side of the front wall portion, and the upper side of the floor wall portion in a manner spanning the front side frame. The channel side reinforcement plate is arranged on the lower side of the floor wall portion, The wheel arch side reinforcement panel and the tunnel side reinforcement panel are connected to each other inward in the vehicle width direction relative to the front side frame.

4. The vehicle body front structure according to claim 1, characterized in that: The wheel arch side reinforcement plate is stacked on the front wall portion, the floor wall portion, and the wheel arch portion.

5. The vehicle body front structure according to claim 4, characterized in that: The wheel arch side reinforcement plate has a flat surface portion at a location corresponding to an intersection of the front wall portion, the floor wall portion, and the wheel arch portion.

6. The vehicle body front structure according to claim 3, characterized in that: The tunnel side reinforcement plate includes: a lower wall reinforcement portion along the floor wall portion; and a tunnel reinforcement portion extending upward from an inner end portion of the lower wall reinforcement portion in the vehicle width direction. The channel reinforcement portion is fixed to the channel portion.

7. The vehicle body front structure according to claim 6, characterized in that: A channel reinforcement plate is provided, wherein the channel reinforcement plate is stacked inside the channel of the channel portion, The channel reinforcement portion of the channel side reinforcement plate is fixed to the channel reinforcement plate.

8. The vehicle body front structure according to claim 1, characterized in that: A bracket is provided, the bracket being fixed to the tunnel-side reinforcing plate and restricting a trajectory of an accelerator pedal.

9. The vehicle body front structure according to claim 1, characterized in that: A fixing portion fixed to the front pillar and a notch portion spaced apart from the front pillar at a lower side of the fixing portion are formed at an outer end portion in the vehicle width direction of the wheel arch side reinforcement.

Images