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 has an opening / closing shaft TR facing a vehicle width direction provided on a vehicle front side of a cabin; a front end cross member 150; a radiator unit RG which forms an inclination SL from a vehicle lower rear side to a vehicle upper front side; a wind guide part 300 which is provided with a funnel part 310 that is provided on the vehicle upper side of the radiator unit part RG and has an arc shape and a wind guide slide part 320; a slide part 400 which is fixed to the vehicle rear side of the radiator unit part RG; a front trunk part 200 which is mounted on the wind guide part 300, and has a trunk unit projection part 220 engaged with the funnel part 310 on the vehicle lower front side; and a front hood connection part 500 for connecting the wind guide slide part 320 to 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 mounted below the 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] Furthermore, 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 body structure comprising: a front hood section in which an opening / closing axis facing in the vehicle width direction is provided on the vehicle front side of the cabin of the vehicle; a front end cross member extending in the vehicle width direction at the front upper part of the vehicle; a radiator unit section provided on the front side of the vehicle and inclined from the rear lower part of the vehicle toward the front upper part of the vehicle; an air guide section provided on the vehicle upper side of the radiator unit section and provided with a funnel section having an arc shape extending from the rear lower part of the vehicle toward the front upper part of the vehicle and an air guide sliding section that slides on the vehicle rear side of the radiator unit section; a slide section fixed to the vehicle rear side of the radiator unit section and slidably housing the air guide sliding section; a front trunk section placed on the air guide section at the vehicle rear side of the front end cross member and having a protrusion on the front lower part of the vehicle that slidably engages with the funnel section; and a front hood connecting section that connects the air guide sliding section to the front hood section. [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 having a rotation axis 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. An 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 unit RG) The radiator unit RG is surrounded by a radiator frame 170 at the front side of the vehicle and is provided on the vehicle inner side of the front side frames 120 and the lower frames 130. The radiator unit RG is inclined at an angle SL from the rear lower part of the vehicle toward the front upper part of the vehicle. An airflow guide portion 300 is provided on the vehicle front side of the radiator unit portion RG, and a slide portion 400 is fixed to the vehicle rear side of the radiator unit portion 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. An upper side of a radiator frame 170 extending in the vehicle width direction is joined to the inside of the front side frame 120 in the vehicle width direction.

[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. The vehicle lower side of a radiator frame 170 extending in the vehicle width direction is joined to the inner side of the lower frame 130 in the vehicle width direction. 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 lower side of the front frame 140 is connected to the front side frames 120 and the lower frame 130. The upper side of the front frame 140 is connected to a front end cross member 150. A bumper beam BP is connected to the vehicle front side of the front frame 140. The front frame 140 is configured with a front end cross member 150 and the bumper beam BP in a substantially rectangular shape when viewed from the vehicle traveling direction.

[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 of the front-end cross member 150 in the vehicle width direction, and is connected to the front frame 140 on the vehicle lower surface of the front-end cross member 150. 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. 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 as the frame portion 100 when the front hood portion FF is closed. When the front hood portion FF is closed, an engaging portion EG provided on the front hood portion FF engages with the hood locking portion LK.

[0028] 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.

[0029] The radiator frame 170 is formed in a substantially 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 unit 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.

[0030] 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 to the front side of the front frame 140 at both ends in the vehicle width direction by welding or the like.

[0031] (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 upper side of the air guide section 300 described later, at the vehicle rear side of the front end cross member 150, and the front side of the lower part of the vehicle of the front trunk section 200 has a trunk unit protrusion 220 as a protrusion that slidably engages with the funnel section 310.

[0032] As shown in FIGS. 3(a) to 3(d), trunk unit 210 in front trunk section 200 is provided with trunk unit protrusion 220 and trunk unit engagement groove 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 Figures 3(a) and 3(d). The front side of trunk unit 210 is formed in a substantially flat shape as shown in Figures 3(b) and 3(c).

[0033] As shown in Fig. 3(c), trunk unit protrusion 220 is formed in a generally semi-cylindrical shape facing downward toward the vehicle. As shown in Fig. 3(b), trunk unit protrusion 220 is provided on the front side of the lower part of the vehicle of trunk unit 210, extending in the vehicle width direction. Trunk unit protrusion 220 engages with the upper side of funnel portion 310 of air guide portion 300 so as to be slidable in the front-rear direction of the vehicle.

[0034] Trunk unit engaging groove 230 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 upper side of the vehicle. As shown in Figures 3(a) and 3(d), trunk unit engaging groove 230 is provided linearly in the vehicle width direction. The trunk unit engaging groove 230 is rotatably engaged with the air guide protrusion 330 of the air guide unit 300 .

[0035] (Regarding the airflow guide portion 300) As shown in Figures 4(a) to 4(c), the air guide section 300 is provided on the vehicle upper side of the radiator unit section RG. The air guide section 300 includes a funnel section 310 having an arc shape AS extending from the lower rear side of the vehicle toward the upper front side of the vehicle, an air guide sliding section 320 that slides on the vehicle rear side of the radiator unit section RG, and an air guide protrusion section 330. One end of a connecting member 520 of a front hood connecting portion 500 (described later) is connected to the rear side of the lower part of the vehicle of the air guide portion 300. The airflow guide 300 is housed inside the slide 400 on the vehicle upper side of the radiator unit RG so as to be slidable along the slope SL. The airflow guide 300 is an intake air introduction path that sends cooling air from the front side of the vehicle to the radiator unit RG.

[0036] The funnel 310 is an intake port that efficiently sends cooling air to the radiator unit RG. It has an arc shape AS that extends from the rear lower part of the vehicle toward the front upper part of the vehicle, and is shaped to guide air evenly into the radiator unit RG. 4(a) and 4(b), the funnel portion 310 extends linearly in the vehicle width direction on the upper side of the vehicle, and is formed from a member such as metal or resin. An air guide sliding portion 320 is coupled to the funnel portion 310 on the rear side of the vehicle. On the upper side of the vehicle of funnel portion 310, trunk unit engaging groove portion 230 of front trunk portion 200 is placed.

[0037] The air guide sliding portion 320 is formed in a substantially flat plate shape from a member such as metal or resin. The wind guide sliding part 320 is joined to the vehicle rear side of the funnel part 310. On the outer side in the vehicle width direction of the wind guide sliding part 320, there is a sliding part SP that abuts against the slide part 400, and on the inner side in the vehicle width direction of the wind guide sliding part 320, there is provided a ventilation part MS that allows ventilation in the front-to-rear direction of the vehicle. One end of a connecting member 520 is connected to the rear side of the lower part of the vehicle of the air guide sliding part 320.

[0038] 4(c), the wind guide protrusion 330 is formed in a substantially semi-cylindrical shape facing the upper side of the vehicle. The wind guide protrusion 330 protrudes toward the upper side of the vehicle on the rear side of the funnel portion 310. 4(a) and 4(b), the wind guide protrusion 330 extends linearly in the vehicle width direction on the upper side of the vehicle and is made of a material such as metal or resin. Above the vehicle, trunk unit protrusion 220 of front trunk section 200 is placed on air guide protrusion 330.

[0039] (Regarding the slide portion 400) The slide portion 400 is fixed to the vehicle rear side of the radiator unit RG, and slidably houses the air guide sliding portion 320. The slide portion 400 forms an inclination SL. As shown in Figures 4(a) to 4(c), the sliding section 400 is formed in the shape of a hollow, approximately rectangular column with a approximately rectangular opening on the upper side of the vehicle. The upper and lower sides of the sliding section 400 have approximately rectangular openings, and frames along which the sliding section SP of the air guide section 300 slides are formed around the periphery of the upper and lower sides of the vehicle. The air guide part 300 is slidably housed inside the sliding part 400.

[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 connecting portion 500 includes an opening / closing shaft gear FG fixed to the opening / closing shaft TR of the front hood portion FF, an interlocking portion gear MG engaged with the opening / closing shaft gear FG, a reel portion 510, and a connecting 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, for example, 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 sliding part 320 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. The connecting member 520, which is coupled to the interlocking gear MG, moves in the direction indicated by the arrow AR3 by being wound around the reel part 510. Then, the air guide part 300 is lifted in the direction indicated by the arrow AR4.

[0046] As shown in FIG. 5(b), the sliding portion SP of the air guide portion 300 slides inside the slide portion 400 toward the upper front side of the vehicle along the slope SL of the radiator unit portion RG. The funnel portion 310 and the air guide protrusion portion 330 provided on the air guide portion 300 engage with the trunk unit protrusion portion 220 and the trunk unit engagement groove portion 230 of the front trunk portion 200, and push the front trunk portion 200 up toward the front upper side of the vehicle as shown by arrow AR5. The front trunk section 200, which has been pushed up toward the front upper portion of the vehicle, comes into contact with the rear lower portion of the vehicle of the front-end cross member 150, which is provided at the front upper portion of the vehicle. The air guide section 300 further pushes up the front trunk section 200, causing the front trunk section 200 to rotate toward the front of the vehicle around the rear lower portion of the vehicle of the front-end cross member 150 as the center of rotation, as shown by arrow AR6, and tilt 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, as the front trunk section 200 abuts against the front end cross member 150, the front trunk section 200 tilts toward the front of the vehicle.

[0049] (When a collision occurs from the front of vehicle V) As shown in FIG. 6(a), when a collision object CO collides with the front side of a vehicle V, collision energy is transmitted to the bumper beam BP, the front frame 140, and the front hood portion FF in the direction indicated by the arrow BR1.

[0050] 6(b), the collision energy transmitted to the bumper beam BP and the front frame 140 moves in the directions of arrows BR2 and BR3, crushing the bumper beam BP and the front frame 140 and pushing the front side frames 120, the lower frames 130, and the upper frames 160 toward the rear of the vehicle. Then, the colliding object CO interferes with the airflow guide part 300. When the front side of funnel portion 310 is pushed by collision object CO, funnel portion 310 bends toward the bottom of the vehicle. When trunk unit protrusion 220 of front trunk portion 200 placed on funnel portion 310 moves toward the bottom of the vehicle, front trunk portion 200 tilts toward the front of the vehicle.

[0051] Meanwhile, collision energy is transmitted to the front hood section FF in the direction indicated by arrow BR3. 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, at a weak point WP provided in the front hood section FF in the direction indicated by arrow BR4, 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 BR5. As the connecting member 520 is wound onto the reel section 510, the connecting member 520 moves in the direction indicated by arrow BR6. Then, the funnel section 310 and the air guide protrusion 330 of the air guide section 300 push up the front trunk section 200 in the direction indicated by arrow BR7.

[0052] If further collision energy is transmitted from the colliding object CO, the collision energy will further push the bumper beam BP, the front frame 140, and the front hood portion FF toward the rear of the vehicle, as shown in FIG. 6(c).

[0053] As shown in Figure 6(c), the collision energy transmitted to the bumper beam BP and the front frame 140 further crushes the bumper beam BP and the front frame 140, while pushing the front side frames 120, the lower frames 130, and the upper frames 160 toward the rear of the vehicle. The funnel portion 310 further deforms toward the bottom of the vehicle. Then, as the front side of the front hood portion FF further moves toward the bottom of the vehicle, the front trunk portion 200 further tilts toward the front of the vehicle. Meanwhile, front hood section FF is further lifted in the direction of arrow BR4, causing opening / closing axis TR to further rotate. Reel section 510 of front hood connecting section 500 further winds up connecting member 520, and connecting member 520 further moves air guide section 300 in the direction indicated by arrow BR7. Then, funnel section 310 and air guide protrusion 330 of air guide section 300 push up front trunk section 200 in the direction indicated by arrow BR7.

[0054] At this time, the front hood section FF is also raised upward toward the vehicle, forming a space PS (the dotted hatched area in FIG. 6(c)) above the front trunk section 200. As a result, the front trunk section 200 is raised upward toward the vehicle without being restricted by the front hood section FF, and by tilting toward the front of the vehicle, moves in a direction away from the drive section DU.

[0055] 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 lower frames 130, and the upper frames 160. 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.

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

[0057] As described above, when an object CO strikes the front of the vehicle V, the funnel portion 310 of the air guide portion 300 is pushed toward the rear of the vehicle, causing the front trunk portion 200 to tilt toward the upper front of the vehicle. Furthermore, the front hood portion FF is pushed toward the rear of the vehicle by the object CO, and the air guide portion 300 slides toward the upper front of the vehicle via the front hood connecting portion 500, causing the air guide portion 300 to push up the front trunk portion 200. Then, the front trunk portion 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.

[0058] As described above, the vehicle body front structure 1 according to this embodiment includes the front hood section FF, in which the opening / closing axis TR facing in the vehicle width direction is provided on the vehicle front side of the cabin of the vehicle V, the front-end cross member 150 extending in the vehicle width direction at the front side of the upper part of the vehicle, the radiator unit section RG provided on the front side of the vehicle and having an inclination SL from the rear side of the lower part of the vehicle toward the front side of the upper part of the vehicle, the funnel section 310 provided on the vehicle upper side of the radiator unit section RG and having an arc shape extending from the rear side of the lower part of the vehicle toward the front side of the upper part of the vehicle, and the funnel section 310 on the vehicle rear side of the radiator unit section RG. the front trunk section 200 is placed on the air guide section 300 at the vehicle rear side of the front end cross member 150 and has a trunk unit protrusion 220 as a protrusion at the front lower part of the vehicle that slidably engages with the funnel section 310; and a front hood connecting section 500 that connects the air guide sliding section 320 to the front hood section FF. That is, when a user loads or unloads luggage into or from the front trunk 200, the user opens the front hood FF, causing the opening / closing axis TR to rotate, and the vehicle body front structure 1 lifts the air guide sliding portion 320 provided on the air guide 300 via the front hood connecting portion 500, which connects the air guide sliding portion 320 to the front hood FF. The air guide 300 slides along the slide portion 400 and lifts toward the upper front of the vehicle. The funnel portion 310 and the air guide protrusion 330 provided on the air guide 300 push the front trunk 200, which is placed above the air guide 300, toward the upper front of the vehicle. When the front trunk 200 abuts against the front end cross member 150 provided on the vehicle front side of the front trunk 200, the front trunk 200 tilts toward the front of the vehicle, with the front end cross member 150 as a fulcrum. Therefore, when a user puts or takes luggage into or out of the front trunk section 200, the air guide section 300 lifts the front trunk section 200 toward the upper side of the vehicle and tilts the front trunk section 200 toward the front of the vehicle, allowing the user to see the inside of the front trunk section 200 and easily put or take luggage into or out of the bottom of the front trunk section 200. When a collision object CO hits the vehicle V from the front side, the collision object CO pushes the bumper beam BP and front frame 140 constituting the frame portion 100 toward the rear of the vehicle. The collision object CO comes into contact with the funnel portion 310 provided in the air guide portion 300, and the arc-shaped funnel portion 310 curves toward the bottom of the vehicle. The trunk unit protrusion 220 of the front trunk portion 200 placed on the funnel portion 310 moves toward the bottom of the vehicle, causing the front trunk portion 200 to tilt toward the front of the vehicle. Furthermore, 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. When the opening / closing axis TR provided on the front hood section FF rotates, the air guide section 300 slides on the slide section 400 toward the front upper side of the vehicle via the front hood connecting section 500. The funnel section 310 and the air guide protrusion 330 provided on the air guide section 300 push the front trunk section 200 toward the front upper side of the vehicle, and the front trunk section 200 moves toward the front upper side of the vehicle where it does not interfere with the drive section DU. Therefore, when an object CO hits the front of the vehicle V, the air guide section 300 is pushed by the object CO, causing the vehicle body front structure 1 to tilt the front trunk section 200 toward the front of the vehicle. Furthermore, the front hood section FF is bent by the object CO, causing the vehicle body front structure 1 to move the air guide section 300 toward the front upper part of the vehicle along the slide section 400. Then, the air guide section 300 moves the front trunk section 200 toward the front upper part of the vehicle, causing the vehicle body front structure 1 to move the front trunk section 200 toward the front upper part 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.

[0059] 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]

[0060] 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; Trunk unit protrusion 230: Trunk unit engagement groove 300: Air guide section 310; Funnel section 320: Air guide slide 330: Air guide protrusion 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 unit TR: Opening and closing axis V; Vehicle

Claims

[Claim 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; a radiator unit provided at the front of the vehicle and inclined from the rear lower part of the vehicle toward the front upper part of the vehicle; an air guide section provided on the upper side of the radiator unit and including a funnel section having an arc shape extending from the rear side of the lower part of the vehicle to the front side of the upper part of the vehicle, and an air guide sliding section that slides on the rear side of the radiator unit; a slide portion fixed to the rear side of the radiator unit and slidably housing the air guide slide portion; a front trunk portion that is placed on the air guide portion at the vehicle rear side of the front end cross member and has a protrusion at the front lower portion of the vehicle that slidably engages with the funnel portion; a front hood connecting portion that connects the air guide sliding portion to the front hood portion; A vehicle front structure comprising:

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