Vehicle body front structure

Abstract

To improve convenience of a front trunk, and reduce interference with a vehicle device when collision from a vehicle front side occurs.SOLUTION: A vehicle body front structure includes: a front hood part FF which is provided with an opening / closing shaft TR facing a vehicle width direction; a front end cross member 150 on a vehicle upper front side; a wind guide part 300 which forms an inclination SL1 and an inclination SL2 to the vehicle upper rear side from the vehicle lower front side, has a suction port AI for sucking air on the vehicle lower front side, and is provided with a wind guide cross member 320 extending in the vehicle width direction; a front trunk part 200 whose vehicle lower side face is rotatably engaged with the wind guide cross member 320; a slide part 400 with which the wind guide part 300 is slidably engaged; and a front hood connection part 500 for interlockingly connecting the wind guide part 300 and the front hood part FF.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] 2. Description of the Related Art In recent years, electric vehicles have become increasingly popular, and as power units that drive the front wheels have become smaller, a front trunk may be attached to the underside of a front hood at the front of the vehicle.

[0003] The front trunk is located at the front of the vehicle, behind the bumper, air intake, or cooling system. The front trunk is recessed from the front end of the vehicle. Therefore, when a user tries to put something in or take something out of the front trunk, their body may come into contact with the front bumper face, making it difficult to put something in or take something out of the bottom of the front trunk.

[0004] As a technology to address the above-mentioned issues, a technology has been disclosed for a sliding double floor for a trunk room, which is configured in a vehicle equipped with a trunk lid that opens to the height of the trunk floor in order to ensure the opening dimensions of the trunk room, and which comprises a sliding movable floor that is guided and slid by rollers in guide grooves in the trunk floor and trunk side inner panel, and a wire that links the sliding of the sliding movable floor to the opening and closing of the trunk lid (see, for example, Patent Document 1).

[0005] Furthermore, in the event of a frontal collision in an electric vehicle, it is necessary to reduce the impact on high-voltage devices such as the power unit or inverter that drives the front wheels by absorbing the impact in the front body structure.

[0006] As a technology for addressing the above-described problems, a first weak portion and a second weak portion are formed in an engine hood inner panel of an engine hood (front hood) along the vehicle width direction. The first weak portion is provided in a division on the front side of the vehicle that divides the engine hood into approximately three equal parts in the longitudinal length of the engine hood, and has a convex shape facing upward toward the vehicle. The second weak portion is provided in a division on the rear side of the vehicle that divides the engine hood into approximately three equal parts in the longitudinal length of the engine hood, and has a convex shape facing upward toward the vehicle. A technology has been disclosed in which the cross-sectional shapes of the first weak portion and the second weak portion, as viewed in the vehicle width direction, are semicircular with openings facing downward, and the depth of the first weak portion is shallower than the depth of the second weak portion (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Utility Model Application Publication No. 2-113536 [Patent Document 2] Japanese Patent Application Publication No. 9-226629 Summary of the Invention [Problem to be solved by the invention]

[0008] In the technology described in Patent Document 1, the trunk is moved in the longitudinal direction of the vehicle when the trunk hood is opened. However, the technology described in Patent Document 1 does not take into consideration the movement of the trunk in the vertical direction of the vehicle when the trunk hood is opened, which poses a problem in that it may be difficult to load and unload luggage placed at the bottom of the trunk.

[0009] In addition, in the technology described in Patent Document 2, when a collision occurs from the front of the vehicle, the vehicle engine hood (vehicle front hood) bends starting from the first weak part and the second weak part, thereby shortening the front-to-rear length of the vehicle front hood at maximum deformation.

[0010] However, the technology described in Patent Document 2 has a problem in that, for example, when a front trunk is provided on the underside of the front hood of an electric vehicle, the behavior of the front trunk in the event of a collision from the front of the vehicle is not taken into consideration, which means that there is a risk that the front trunk may interfere with the high-voltage device.

[0011] Therefore, the present invention has been made in consideration of the above-mentioned problems, and aims to provide a front body structure that improves the convenience of the front trunk and reduces interference with vehicle equipment in the event of a collision from the front of the vehicle. [Means for solving the problem]

[0012] One or more embodiments of the present invention propose a vehicle front structure comprising: a front hood section in which an opening / closing axis facing in the vehicle width direction is provided on the front side of the cabin of the vehicle; a front end cross member provided on the front lower part of the vehicle and extending in the vehicle width direction; an air guide section inclined at the front lower part of the vehicle from the front lower part of the vehicle to the rear upper part of the vehicle, having an intake port for taking in air at the front lower part of the vehicle and having an air guide cross member extending in the vehicle width direction at the rear upper part of the vehicle; a front trunk section placed on the rear side of the front end cross member and above the air guide section, with the underside of the vehicle rotatably engaged with the air guide cross member; a slide section extending in the fore-and-aft direction of the vehicle and slidably engaging the air guide section; and a front hood connecting section connecting the air guide section and the front hood section in an interlocking manner. [Effects of the Invention]

[0013] According to one or more embodiments of the present invention, it is possible to improve the convenience of the front trunk and reduce interference with vehicle devices in the event of a frontal collision of the vehicle. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a schematic view of a vehicle front body structure according to an embodiment of the present invention, viewed from above the vehicle. [Figure 2] 2 is a cross-sectional view taken along line AA in FIG. 1, showing a state in which a front hood is closed in the vehicle front body structure according to the embodiment of the present invention. [Figure 3] 1A and 1B are diagrams showing a front trunk in a vehicle front structure according to an embodiment of the present invention, in which (a) is a plan view seen from above the vehicle, (b) is a front view seen from the vehicle travel direction, (c) is a side view seen from the left side when facing the vehicle travel direction, and (d) is a bottom view seen from below the vehicle. [Figure 4] 1A and 1B are diagrams showing the air guide section and the slide section in the front body structure of an embodiment of the present invention, where (a) is a plan view seen from above the vehicle, (b) is a front view seen from the vehicle travel direction, and (c) is a side view seen from the left side when facing the vehicle travel direction. [Figure 5] 2A to 2B are cross-sectional views taken along line AA of FIG. 1, showing the movement of the front vehicle body structure when a user opens the front trunk section in a time series order from (a) to (b), in the front vehicle body structure according to an embodiment of the present invention. [Figure 6] 2A to 2C are cross-sectional views taken along line AA of FIG. 1, showing the movement of the vehicle front structure when an object strikes the vehicle from the direction of travel in a time series in the order of (a) to (c), in the vehicle front structure according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] A vehicle body front structure 1 according to this embodiment will be described below with reference to Figures 1 to 6. Note that the arrow FR, shown as appropriate in the drawings, indicates the vehicle traveling direction of the vehicle V, the arrow UP indicates the upper side of the vehicle V, and the arrow RH indicates the right side when facing the vehicle traveling direction. Furthermore, in the following description, when the up / down, front / rear, and left / right directions are used, they refer to the up / down direction when facing the vehicle traveling direction, the front / rear direction with the vehicle traveling direction as the front, and the left / right direction when facing the vehicle traveling direction, unless otherwise specified.

[0016] <Embodiment> The configuration of a vehicle body front structure 1 according to this embodiment will be described with reference to FIGS. 1 to 4. FIG.

[0017] <About Vehicle V> The vehicle V is, for example, an electric vehicle (EV) using a vehicle drive motor in the drive unit DU as a drive source. Note that the vehicle V may also be a hybrid electric vehicle (HEV) having multiple drive sources, such as an engine and a power unit.

[0018] (Regarding front body structure 1) As shown in Figure 1, the vehicle V has a cabin CA as the interior of the vehicle where an occupant P sits, configured on the rear side of the toe board section 110, and a vehicle front structure 1 configured on the front side of the toe board section 110. The vehicle body front structure 1 is configured to include a drive unit DU, a radiator unit RG, a frame unit 100, a front trunk unit 200, an air guide unit 300, a slide unit 400, and a front hood connecting unit 500. An openable front hood section FF is provided on the upper side of the vehicle of the vehicle front body structure 1. The front hood section FF is provided with an opening / closing axis TR facing in the vehicle width direction on the vehicle front side of the cabin CA of the vehicle V.

[0019] (Front hood FF) The front hood portion FF is disposed so as to cover the upper side of the vehicle of the front vehicle body structure 1. 2, the front hood section FF is provided with an opening / closing axis TR facing in the vehicle width direction on the front side of the toe board section 110. The front hood section FF is configured to open and close by moving the front side of the vehicle of the front hood section FF up and down with the opening / closing axis TR as a fulcrum. A front hood engagement portion EG is provided on the vehicle front side of the front hood portion FF, which engages the front hood portion FF with a hood lock portion LK of the front end cross member 150 when the front hood portion FF is closed. A weakened portion WP is provided on the outer side of the lower portion of the vehicle of the front hood portion FF as, for example, a V-shaped groove in a side view.

[0020] (About the drive unit DU) The drive unit DU is configured to include a power unit and an inverter. The power unit is a drive device provided with a vehicle drive motor (not shown) that drives the front wheels FT, a transmission, a clutch, a drive shaft, etc. The inverter generates the high voltage required to drive the power unit. The drive unit DU is mounted and fixed to the front side frame 120 or the lower frame 130.

[0021] (Regarding the radiator RG) The radiator section RG is surrounded by a radiator frame 170 and is provided on the vehicle front side on the vehicle inner side of the front side frames 120 and the lower frames 130. The radiator section RG is inclined from the front lower part of the vehicle toward the rear upper part of the vehicle. An air guide section 300 and a slide section 400 are provided on the vehicle upper side of the radiator section RG.

[0022] (Regarding the frame portion 100) The frame portion 100 forms the skeleton of the vehicle V in the vehicle body front structure 1. The frame section 100 is configured to include a toe board section 110, a front side frame 120, a lower frame 130, a front frame 140, a front end cross member 150, an upper frame 160, and a radiator frame 170. A bumper beam BP extending in the vehicle width direction is provided at the front of the vehicle, and a torque box TB extending in the vehicle width direction is provided below the toe board 110. A frame (not shown) extending toward the rear of the vehicle is connected to the torque box TB.

[0023] The toe board portion 110 is erected in the vehicle up-down direction at the vehicle front side of the cabin CA, and forms a partition wall that separates the cabin CA from the vehicle body front structure 1. The toe board portion 110 is made of metal or the like.

[0024] The front side frames 120 extend in the longitudinal direction of the vehicle on both sides in the vehicle width direction. The front side frames 120 are joined to the toe board 110 at the rear end of the vehicle by welding or the like. The front side frames 120 are formed from metal or the like and have a substantially rectangular closed cross-sectional shape.

[0025] The lower frame 130 is provided to extend in the front-rear direction of the vehicle below the front side frame 120. The lower frame 130 is made of metal or the like and has a substantially rectangular closed cross section. A radiator frame 170 extending in the vehicle width direction is joined to the front side of the lower frame 130, so that the lower frame 130 is formed in a substantially rectangular shape when viewed from above the vehicle. The rear end of the lower frame 130 is connected to the toe board 110 or the torque box TB by welding or the like.

[0026] The front frame 140 has a substantially rectangular closed cross section and extends in the vehicle vertical direction on both sides of the vehicle V in the vehicle width direction. The front frame 140 is joined to the front side frames 120 and the lower frame 130 on the vehicle lower side of the front frame 140. The front frame 140 is connected to a front-end cross member 150 on the upper side of the vehicle. A bumper beam BP is connected to the front side of the vehicle of the front frame 140. The front frame 140 is configured with the front-end cross member 150 and the bumper beam BP to have a substantially rectangular shape when viewed from the side in the direction of travel of the vehicle. The front end of the front trunk section 200 is placed on the upper side of the front frame 140, and the rear side of the front frame 140 and the front side of the front trunk section 200 are in contact with each other.

[0027] The front-end cross member 150 has a substantially rectangular closed cross section and extends in the vehicle width direction at the front upper part of the vehicle. The front-end cross member 150 is made of a material such as metal. The front end cross member 150 is connected to the upper frame 160 on both sides in the vehicle width direction, and is connected to the front frame 140 on the lower side of the vehicle. A hood locking portion LK is provided in the center of the front end cross member 150 in the vehicle width direction as a locking device that secures the front hood portion FF to the front end cross member 150 when the front hood portion FF is closed. When the front hood portion FF is closed, a front hood engaging portion EG provided on the front hood portion FF engages with the hood locking portion LK. The front end cross member 150 has a slope on the rear side of the vehicle against which the front trunk section 200 abuts when the front trunk section 200 is raised.

[0028] A locking mechanism FX is provided on the rear side of the front end cross member 150, which engages with an engaging portion 230, which is a recess provided on the outer side of the front trunk portion 200 in the vehicle width direction, when the front trunk portion 200 is lifted. The locking mechanism FX is, for example, a rod that protrudes toward the rear of the vehicle and is bent in the vehicle width direction at its rear end, which engages with an engaging portion 230 provided on the front trunk 200 when the front trunk 200 is raised.

[0029] The upper frames 160 are provided above the front side frames 120 on both sides in the vehicle width direction, and extend in the front-to-rear direction of the vehicle. The upper frames 160 are connected to the toe board portion 110 on the rear side of the vehicle, and are connected to the radiator frame 170 on the front side of the vehicle. The upper frames 160 are formed from metal or the like, and have a substantially rectangular closed cross-sectional shape.

[0030] The radiator frame 170 is formed in a generally rectangular frame shape at the front of the vehicle when viewed from the vehicle travel direction, and is configured as a frame that surrounds and supports the radiator section RG of the vehicle V. The radiator frame 170 is joined to the front side frames 120 and the lower frames 130 on both sides in the vehicle width direction by welding or the like.

[0031] The bumper beam BP extends in the vehicle width direction at the front lower part of the vehicle. The bumper beam BP is formed of metal or the like and has a substantially rectangular closed cross section. The bumper beam BP is joined at both ends in the vehicle width direction to the front side of the front frame 140 by welding or the like.

[0032] (Regarding the front trunk 200) The front trunk section 200 is a storage box made of resin or other material for storing luggage, etc. The interior of the front trunk section 200 is formed in a recessed shape with an opening on the upper side of the vehicle. The front trunk section 200 is placed on the vehicle rear side of the front end cross member 150 and on the vehicle upper side of the air guide section 300, and the vehicle lower surface of the air guide section 300 is rotatably engaged with the air guide cross member 320. The front trunk section 200 is disposed on the inner side of the upper frame 160 in the vehicle width direction.

[0033] As shown in FIGS. 3(a) to 3(d), trunk unit 210 in front trunk section 200 is provided with an engaging groove section 220 and an engaging section 230. As shown in FIGS. The upper and lower vehicle surfaces of trunk unit 210 are formed in a substantially rectangular shape, as shown in Figs. 3(a) and 3(d). 3(b) and 3(c), the front side of trunk unit 210 protrudes toward the front of the vehicle from the upper side of the vehicle. A substantially semicircular engagement groove 220 is provided on the bottom surface of trunk unit 210 and extends in the vehicle width direction. An engaging portion 230 serving as a recess is provided on a side surface of trunk unit 210 in the vehicle width direction. Engaging portion 230 is formed as a recess that engages with the vehicle rear end portion of locking mechanism FX of front-end cross member 150 when front trunk section 200 is lifted toward the upper side of the vehicle. The front upper portion of the vehicle of the front trunk portion 200 protrudes toward the front of the vehicle and is placed on the upper side of the front end cross member 150 of the vehicle.

[0034] Engagement groove 220 is provided as a recessed groove that extends in the vehicle width direction on the vehicle underside of trunk unit 210 and is recessed in an arc shape toward the vehicle upper side. As shown in Figures 3(a) and 3(d), engagement groove 220 is provided linearly in the vehicle width direction. An air guide cross member 320 of the air guide part 300, which will be described later, is in rotatable contact with the engaging groove part 220 on the vehicle lower side.

[0035] (Regarding the airflow guide portion 300) As shown in FIG. 2, the air guide portion 300 is provided on the front side of the lower part of the vehicle, and is slidably engaged with a slide portion 400 (described later) on the upper side of the vehicle. 4(a) to 4(c), the air guide section 300 forms an inclination SL1 from the front lower part of the vehicle toward the rear upper part of the vehicle, and has an intake port AI at the front lower part of the vehicle for taking in air. The air guide section 300 has an air guide cross member 320 at the rear upper part of the vehicle of the air guide section 300. The air guide portion 300 includes an air guide case 310 , an air guide cross member 320 , and a sliding portion 330 . The airflow guide portion 300 is an intake port that takes in cooling air from the intake port AI and sends it to the radiator portion RG. As shown in FIG. 4(c), the width of the intake port AI in the vehicle vertical direction at the front side of the vehicle is formed to be wider than the width at the vehicle rear side in the vehicle vertical direction.

[0036] The air guide case 310 is a case that surrounds the upper side of the vehicle and both sides in the vehicle width direction of the air guide section 300. A cavity serving as an air guide path is provided inside the air guide section 300 that is surrounded by the air guide case 310. An opening serving as a ventilation hole is provided on the lower side of the vehicle of the air guide case 310. One end of a connecting member 520 of a front hood connecting portion 500 (described later) is connected to the front side of the lower part of the vehicle of the air guide case 310.

[0037] The air guide cross member 320 is made of resin, metal, or other material and is formed in a generally cylindrical shape, extending in the vehicle width direction. The air guide cross member 320 is joined to the air guide case 310 on the rear side of the vehicle. The air guide cross member 320 is engaged with the engaging groove 220 in the front trunk section 200, thereby placing the front trunk section 200 on the upper side of the air guide cross member 320 of the vehicle.

[0038] The sliding portions 330 are provided on both sides of the wind guide case 310 in the vehicle width direction, and are slidably engaged with the sliding portion 400 on the upper side of the vehicle of the sliding portion 400. The sliding part 330 is formed by a cylindrical rod made of metal, resin, etc. The sliding part 330 may be a rotatable wheel or roller.

[0039] (Regarding the slide portion 400) The slide portions 400 are disposed on both sides of the air guide portion 300 in the vehicle width direction, and slidably engage with the sliding portions 330 of the air guide portion 300. The slide portion 400 is fixed, for example, to the upper side of the vehicle of the radiator portion RG. As shown in FIGS. 4(a) to 4(c), the slide portions 400 are disposed on both sides of the air guide portion 300 in the vehicle width direction, and the sliding portion 330 is placed on the upper surface side of the slide portion 400. As shown in Figure 4(c), the slide portion 400 has a slope SL1 extending from the front of the lower part of the vehicle toward the rear of the upper part of the vehicle, and has a slope SL2 bending further upward from approximately the center of the slide portion 400 in the fore-and-aft direction of the vehicle.

[0040] (Front hood connection part 500) As shown in FIG. 2, the front hood connecting portion 500 is provided on the vehicle underside of the front hood portion FF, and connects the air guide portion 300 and the front hood portion FF so that they can be interlocked with each other. The front hood connection part 500 is composed of an opening / closing shaft gear FG fixed to the opening / closing shaft TR of the front hood part FF, an interlocking part gear MG engaged with the opening / closing shaft gear FG, a reel part 510, and a connection member 520. The front hood connecting portion 500 is provided on one or both outer sides of the front hood portion FF in the vehicle width direction.

[0041] The reel portion 510 is fixed to the interlocking gear MG, and when the interlocking gear MG rotates, it winds up or feeds out the connecting member 520. The reel portion 510 is formed from a material such as metal or resin, has the same rotation axis as the rotation axis of the interlocking gear MG, and is fixed to the interlocking gear MG or the rotation axis of the interlocking gear MG. One end of a connecting member 520 is fixed to the reel portion 510 .

[0042] The connecting member 520 is a member such as a wire that pulls the air guide part 300 in coordination with the movement of the front hood part FF. One end of the connecting member 520 is connected to the reel part 510 of the front hood connecting part 500, and the other end of the connecting member 520 is connected to the air guide case 310 of the air guide part 300.

[0043] <Actions and Effects> In the vehicle body front structure 1 according to this embodiment configured as described above, the operation when the front hood section FF is opened and the operation when a collision occurs from the front side of the vehicle V will be described using Figures 5 and 6.

[0044] (When loading and unloading luggage into the front trunk 200) 5(a), when a user wants to put luggage in or take luggage out of the front trunk section 200, the user unlocks the hood lock LK provided on the front side of the front hood section FF and lifts the front end of the front hood section FF toward the top of the vehicle. The front hood section FF rotates in the direction indicated by the arrow AR1 around the opening / closing axis TR as the rotation axis.

[0045] As the opening / closing shaft TR rotates, the opening / closing shaft gear FG in the front hood connecting part 500 rotates, and the interlocking part gear MG and the reel part 510 that are engaged with the opening / closing shaft gear FG rotate in the direction shown by the arrow AR2. Connecting member 520, one end of which is connected to reel unit 510, moves in the direction indicated by arrow AR3 by being wound around reel unit 510. Then, air guide unit 300, to which the other end of connecting member 520 is connected, moves in the direction indicated by arrow AR4.

[0046] As shown in FIG. 5(b), as the air guide part 300 moves toward the rear of the vehicle, the sliding part 330 slides on the upper side of the sliding part 400 toward the rear of the vehicle. The wind guide section 300 slides toward the upper rear of the vehicle due to the inclinations SL1 and SL2 provided on the sliding section 400. The wind guide cross-member 320 provided on the rear side of the vehicle of the wind guide section 300 engages with the engagement groove 220 of the front trunk section 200, and pushes the front trunk section 200 toward the upper side of the vehicle, as shown by the arrow AR5. The front trunk section 200 moves toward the upper side of the vehicle while sliding the front upper side of the vehicle against the front-end cross member 150. An engagement portion 230 provided on the side of the front trunk section 200 engages with a locking mechanism FX provided on the front-end cross member 150. As shown by arrow AR6, the front trunk section 200 rotates toward the front upper side of the vehicle with the locking mechanism FX and the engagement portion 230 as the center of rotation, and tilts toward the front of the vehicle.

[0047] When the user finishes opening the front hood section FF, the front trunk section 200 stops rising upward and tilting toward the front of the vehicle.

[0048] As described above, when a user loads or unloads luggage into the front trunk section 200, the user opens the front trunk section 200, and the air guide section 300 pushes the front trunk section 200 upward toward the top of the vehicle via the front hood connecting section 500. Furthermore, when the engagement portion 230 provided on the side of the front trunk portion 200 engages with the locking mechanism portion FX provided on the front end cross member 150, the front trunk portion 200 rotates toward the front upper portion of the vehicle and tilts toward the front of the vehicle.

[0049] (When a collision occurs from the front of vehicle V) As shown in Figure 6(a), when an object CO collides with the front of the vehicle V, collision energy is transmitted to the bumper beam BP, the lower frame 130, the front frame 140, and the radiator frame 170 from the direction indicated by the arrow BR1.

[0050] 6(b), the collision energy transmitted to the bumper beam BP, the front frame 140, and the radiator frame 170 in the direction indicated by the arrow BR2 crushes the bumper beam BP and the radiator frame 170, and pushes the front side frame 120 and the upper frame 160 toward the rear of the vehicle. The air guide section 300 is pushed toward the rear of the vehicle. As the air guide section 300 is pushed toward the rear of the vehicle, the air guide section 300 moves toward the rear of the vehicle along the inclinations SL1 and SL2 of the slide section 400, and the air guide cross member 320 pushes up the front trunk section 200 in the direction indicated by the arrow BR3.

[0051] Meanwhile, collision energy is transmitted to the front hood section FF in the direction indicated by arrow BR4. When the leading end of the front hood section FF is pushed by the impact object CO, the front hood section FF is bent, for example, in the direction indicated by arrow BR5 at a weak point WP provided in the front hood section FF, and is lifted upward toward the vehicle. As the front hood section FF is lifted upward toward the vehicle, the opening / closing shaft TR rotates, and the reel section 510 of the front hood connecting section 500 rotates in the direction indicated by arrow BR6. As the connecting member 520 is wound onto the reel section 510, it moves in the direction indicated by arrow BR7. Then, the air guide cross-member 320 of the air guide section 300 pushes up the front trunk section 200 in the direction indicated by arrow BR3.

[0052] If further collision energy is transmitted from the colliding object CO, the collision energy will further push the bumper beam BP, the radiator frame 170, and the front hood portion FF toward the rear of the vehicle, as shown in FIG. 6(c).

[0053] The collision energy transmitted to the bumper beam BP and the radiator frame 170 further crushes the bumper beam BP and the radiator frame 170, while pushing the front side frames 120 and the upper frame 160 toward the rear of the vehicle. The air guide section 300 is further pushed toward the rear of the vehicle. As the air guide cross-member 320 further pushes up the front trunk section 200, the front trunk section 200 is lifted in the direction indicated by arrow BR8. Then, as the engagement portion 230 provided on the front trunk section 200 engages with the locking mechanism FX, the front trunk section 200 rotates toward the upper front of the vehicle with the locking mechanism FX and the engagement portion 230 as the center of rotation, and tilts toward the front of the vehicle. The front hood section FF is also raised toward the upper side of the vehicle, forming a space PS (the dotted hatched area in FIG. 6(c)) above the front trunk section 200. The front trunk section 200 is raised toward the upper side of the vehicle without being restricted by the front hood section FF, and moves in a direction away from the drive section DU.

[0054] The collision energy transmitted to the frame portion 100 is absorbed by the frame portion 100 by crushing the bumper beam BP, the front side frames 120, the upper frame 160, and the radiator frame 170. The collision energy is then dispersed to the frame at the rear of the vehicle (not shown) via the toe board portion 110 and the torque box TB, which are connected to the rear of the vehicle.

[0055] As described above, when an object CO hits the front of the vehicle V, the air guide cross-member 320 of the air guide section 300 is pushed toward the rear of the vehicle by the object CO, causing the front trunk section 200 to move toward the upper side of the vehicle. Furthermore, when the front hood section FF is pushed toward the rear of the vehicle by the object CO, the air guide section 300 slides on the slide section 400 via the front hood connecting section 500, and the air guide cross-member 320 further pushes up the front trunk section 200. Then, the front trunk section 200 moves toward the upper side of the vehicle where it does not interfere with the drive unit DU. The collision energy transmitted to the frame portion 100 is absorbed by the frame portion 100 deforming and crushing, and is dispersed through the frame portion 100 toward the rear of the vehicle.

[0056] Then, the movement of the colliding object CO stops and the input of collision energy ends, whereby the absorption of collision energy in the vehicle body front structure 1 ends.

[0057] As described above, the vehicle body front structure 1 of this embodiment comprises a front hood section FF in which an opening / closing axis TR facing in the vehicle width direction is provided on the vehicle front side of the cabin CA of the vehicle V, a front end cross member 150 extending in the vehicle width direction at the front side of the upper part of the vehicle, an air guide section 300 provided on the front side of the lower part of the vehicle and forming inclinations SL1 and SL2 from the front side of the lower part of the vehicle to the rear side of the upper part of the vehicle, having an intake port AI for taking in air at the front side of the lower part of the vehicle and having an air guide cross member 320 extending in the vehicle width direction at the rear side of the upper part of the vehicle, a front trunk section 200 placed on the vehicle rear side of the front end cross member 150 and above the air guide section 300, and whose underside is rotatably engaged with the air guide cross member 320, a slide section 400 extending in the fore-and-aft direction of the vehicle and slidably engaging the air guide section 300, and a front hood connecting section 500 connecting the air guide section 300 to the front hood section FF. That is, when a user loads or unloads luggage into or from the front trunk section 200, the user opens the front hood section FF, causing the opening / closing axis TR to rotate, and the vehicle body front structure 1 lifts the air guide section 300 toward the upper side of the vehicle along the slide section 400 via the front hood connecting section 500. The air guide cross-member 320 of the air guide section 300 pushes up the front trunk section 200, which is placed on the upper side of the vehicle, toward the upper side of the vehicle. Then, the front trunk section 200 rises toward the upper side of the vehicle and tilts toward the front of the vehicle, with the front end cross-member 150 as a fulcrum. Therefore, by the front body structure 1 lifting the bottom surface of the front trunk section 200 toward the upper side of the vehicle and tilting the front trunk section 200 toward the front side of the vehicle, the user can see inside the front trunk section 200 and can easily put in and take out luggage from the bottom surface of the front trunk section 200. When an object CO hits the front of the vehicle V, the object CO pushes the bumper beam BP, lower frame 130, front frame 140, and radiator frame 170 that constitute frame portion 100 toward the rear of the vehicle, causing air guide portion 300 to slide along slide portions 400 toward the upper rear of the vehicle along inclinations SL1 and SL2. Air guide cross-member 320 provided on air guide portion 300 moves toward the upper rear of the vehicle, and air guide cross-member 320 pushes front trunk portion 200, which it is engaged with, toward the upper side of the vehicle. Meanwhile, when the front hood section FF is pushed toward the rear of the vehicle by the collision object CO, the front hood section FF bends toward the upper side of the vehicle, and the rotation of the opening / closing axis TR of the front hood section FF is transmitted to the front hood connecting section 500. The air guide section 300 is pulled via the connecting member 520 of the front hood connecting section 500, and slides along the slopes SL1 and SL2 on the slide section 400 toward the upper rear side of the vehicle. The air guide cross member 320 provided on the air guide section 300 moves toward the upper rear side of the vehicle, and the air guide cross member 320 pushes the front trunk section 200, which is engaged with it, toward the upper side of the vehicle. The front trunk section 200 then moves toward the upper side of the vehicle where it does not interfere with the drive unit DU. Therefore, when an object CO hits the front of the vehicle V, the airflow guide section 300 is pushed by the object CO and the front hood section FF is bent by the object CO, which allows the vehicle body front structure 1 to move the airflow guide section 300 toward the upper rear side of the vehicle along the slopes SL1 and SL2 of the slide section 400. Then, the airflow guide section 300 pushes up the front trunk section 200, allowing the vehicle body front structure 1 to move the front trunk section 200 toward the upper side of the vehicle where it does not interfere with the drive unit DU. This improves the convenience of the front trunk and reduces interference with vehicle devices in the event of a frontal collision of the vehicle.

[0058] In the vehicle body front structure 1 according to this embodiment, the front end cross member 150 is provided with a locking mechanism FX that engages with an engaging portion 230 as a recess provided on the outer side of the front trunk portion 200 in the vehicle width direction. That is, when the user wants to put luggage into or take luggage out of the front trunk portion 200, the user releases the locked state of the hood lock portion LK and opens the front hood portion FF. When the hood lock LK is released from its locked state and the air guide 300 is pulled by the front hood connecting portion 500, the front trunk 200 is lifted upward toward the vehicle. Then, the engaging portion 230 provided on the front trunk 200 engages with the locking mechanism FX, causing the front trunk 200 to rotate toward the front upper portion of the vehicle with the locking mechanism FX and the engaging portion 230 as the center of rotation, and to easily tilt toward the front of the vehicle. Therefore, the vehicle body front structure 1 lifts the bottom surface of the front trunk section 200 toward the upper side of the vehicle and reliably tilts the front trunk section 200 toward the front side of the vehicle, allowing the user to see inside the front trunk section 200 and easily load and unload luggage from the bottom surface of the front trunk section 200. When an object CO hits the front of the vehicle V, the object CO pushes the bumper beam BP and the front frame 140 toward the rear of the vehicle, causing the air guide section 300 to slide along the slopes SL1 and SL2 on the slide section 400 toward the upper rear of the vehicle. The air guide cross member 320 provided on the air guide section 300 moves toward the upper rear of the vehicle, and the air guide cross member 320 pushes the front trunk section 200, which it is engaged with, toward the upper side of the vehicle. Meanwhile, front hood section FF is pushed toward the rear of the vehicle by the collision object CO and bent toward the upper side of the vehicle, causing air guide section 300 to slide toward the upper rear side of the vehicle via front hood connecting section 500. Air guide cross member 320 provided on air guide section 300 moves toward the upper rear side of the vehicle, and air guide cross member 320 pushes front trunk section 200, which it is engaged with, toward the upper side of the vehicle. When the front trunk section 200 is pushed up toward the top of the vehicle, the engagement section 230 provided on the front trunk section 200 engages with the locking mechanism FX. The front trunk section 200 then rotates toward the front of the upper part of the vehicle with the locking mechanism FX and the engagement section 230 as the center of rotation, and easily tilts toward the front of the vehicle. Therefore, when an object CO strikes the vehicle V from the front side, the airflow guide section 300 is pushed by the object CO and the front hood section FF is bent by the object CO, causing the airflow guide section 300 to push the front trunk section 200 upward toward the vehicle. Then, the engaging section 230 provided on the front trunk section 200 engages with the locking mechanism section FX provided on the front-end cross member 150. Then, by easily tilting the front trunk section 200 toward the front of the vehicle with the engaged locking mechanism section FX and the engaging section 230 as the center of rotation, the vehicle body front structure 1 can move the front trunk section 200 toward the vehicle upper side where it does not interfere with the drive unit DU. This improves the convenience of the front trunk and reduces interference with vehicle devices in the event of a frontal collision of the vehicle.

[0059] The lock mechanism FX may be configured to be storable in the front end cross member 150, and to protrude toward the rear of the vehicle when the hood lock LK is released.

[0060] The above describes in detail an embodiment of the present invention with reference to the drawings, but the specific configuration is not limited to this embodiment, and includes designs within the scope of the gist of the present invention. [Explanation of symbols]

[0061] 1; Front body structure 100;frame part 110;Toe board section 120;Front side frame 130; Lower frame 140;Front frame 150; front end cross member 160; upper frame 170; radiator frame 200; Front trunk 210; Trunk unit 220: Engagement groove 230 Engagement part 300: Air guide section 310: Air guide case 320: Air guide cross member 330: Sliding part 400;Slide section 500; Front hood connection part 510;Reel section 520;Connecting member BP; bumper beam FF: Front hood LK: Hood lock RG: Radiator section V; Vehicle

Claims

1. a front hood portion in which an opening / closing axis facing in a vehicle width direction is provided on a vehicle front side of a cabin of the vehicle; a front end cross member extending in the vehicle width direction at the front upper side of the vehicle; an air guide section provided at the front lower part of the vehicle, inclined from the front lower part of the vehicle toward the rear upper part of the vehicle, having an intake port at the front lower part of the vehicle for taking in air, and having an air guide cross member extending in the vehicle width direction at the rear upper part of the vehicle; a front trunk section that is placed on the vehicle rear side of the front end cross member and on the vehicle upper side of the air guide section, and whose vehicle lower surface is rotatably engaged with the air guide cross member; a slide portion extending in the front-rear direction of the vehicle and slidably engaging the air guide portion; a front hood connecting portion that connects the air guide portion and the front hood portion so that they can be interlocked with each other; A vehicle front structure comprising:

2. 2. The vehicle front structure according to claim 1, wherein the front end cross member is provided with a locking mechanism that engages with a recess provided on the outer side of the front trunk portion in the vehicle width direction.

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