Vehicle front part structure

Abstract

To prevent a radiator part from interfering with a vehicle device, when a vehicle collides.SOLUTION: A vehicle front part structure comprises: a radiator unit part 210 provided at a front side of a vehicle; and a front trunk part 300 provided at the front side of the vehicle of the radiator unit part 210. The front trunk part 300 has: a first case part 310 provided at a rear side of the vehicle; and a second case part 320 provided at the front side of the vehicle of the first case part 310. A radiator engaging part FK, which protrudes toward the rear side of the vehicle and engages with the radiator unit part 210 while covering an end at the upper side of the vehicle of the radiator unit part 210, is provided on the upper side of the vehicle of the first case part 310. The first case part 310 and the second case part 320 are turnably engaged with each other by a trunk rotating shaft AT extending toward a width direction of the vehicle.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] 2. Description of the Related Art In recent years, hybrid vehicles and electric vehicles have been increasingly introduced into the field of automobiles and other vehicles.

[0003] When the vehicle is a hybrid vehicle or an electric vehicle, an inverter unit that converts DC voltage into AC voltage to drive an electric motor may be mounted at the front of the vehicle.

[0004] The inverter generates the high voltage necessary for the vehicle to run, and if deformation or disconnection occurs due to a frontal collision of the vehicle or the like, there is a risk of a sudden abnormal reaction occurring. Therefore, when a collision occurs from the front of an electric vehicle, it is necessary to absorb the impact in the front structure of the vehicle to reduce the impact on vehicle devices that are supplied with high voltage, such as the motor or inverter that drives the front wheels.

[0005] As a means for solving the above-mentioned problems, a technology has been disclosed for a vehicle front structure in which a motor section, an inverter section, a charger section, a heat exchanger (radiator section), a steering gear section, and a pair of lower arms are assembled to a module frame, and then the module frame is fastened to a front side member (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 2019-14340 Summary of the Invention [Problem to be solved by the invention]

[0007] The technology shown in Patent Document 1 comprises a motor attached to the frame body, electrical components electrically connected to the motor, and a heat exchanger (radiator section) attached to the lower part of the frame body. By fixing the motor and electrical components within the frame body and fixing the radiator to the lower part of the frame body, this technology improves assembly workability and increases the crash stroke.

[0008] However, the vehicle front structure described in Patent Document 1 had a problem in that, for example, if the vehicle is an electric vehicle, there was a risk that the radiator section would interfere with electrical components such as the motor section or inverter section of the vehicle equipment when the vehicle was hit by a collision.

[0009] Therefore, the present invention has been made in consideration of the above-mentioned problems, and aims to provide a vehicle front structure that prevents the radiator section from interfering with vehicle equipment when a vehicle collision occurs. [Means for solving the problem]

[0010] One or more embodiments of the present invention propose a vehicle front structure having a radiator unit section provided at the front of the vehicle at an angle from the rear of the upper part of the vehicle toward the front of the lower part of the vehicle, and a front trunk section provided at the front of the vehicle of the radiator unit section, wherein the front trunk section has a first trunk case section provided at the rear of the vehicle and a second trunk case section provided at the front of the vehicle of the first trunk case section, and a radiator engagement section is provided on the upper side of the vehicle of the first trunk case section that protrudes toward the rear of the vehicle and engages with the radiator unit section while covering the upper end of the vehicle of the radiator unit section, and the first trunk case section and the second trunk case section are rotatably engaged by a trunk rotation axis extending in the vehicle width direction. [Effects of the Invention]

[0011] According to one or more embodiments of the present invention, it is possible to prevent the radiator unit from interfering with vehicle devices when a vehicle collision occurs. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic view of a vehicle front structure according to an embodiment of the present invention, viewed from above the vehicle. [Figure 2] 1A and 1B are diagrams showing a vehicle front structure according to an embodiment of the present invention with the hood and fenders removed, where (a) is a plan view seen from above the vehicle, and (b) is a side view seen from the vehicle width direction. [Figure 3] 1A and 1B are diagrams of a radiator structure portion in a vehicle front structure according to an embodiment of the present invention, in which (a) is a front view seen from the vehicle travel direction, (b) is a side view seen from the vehicle width direction, and (c) is a plan view seen from above the vehicle. [Figure 4] 1A and 1B are diagrams of the front trunk section in a vehicle front structure according to an embodiment of the present invention, where (a) is a front view seen from the vehicle travel direction, (b) is a side view seen from the vehicle width direction, and (c) is a plan view seen from above the vehicle. [Figure 5] 1 is a side view seen from the vehicle width direction, illustrating a state of a vehicle front structure according to an embodiment of the present invention before a collision occurs in the vehicle. [Figure 6] 1A to 1C are side views, viewed from the vehicle width direction, showing the state of the vehicle front structure according to an embodiment of the present invention when a collision occurs in the vehicle, in chronological order of (a) to (c). DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, a vehicle front structure S according to this embodiment will be described with reference to FIGS. Note that the vehicle V will be described as an electric vehicle (EV) using a vehicle drive motor as a drive source, for example, but may also be a hybrid electric vehicle (HEV) having multiple drive sources such as an engine and a power unit, or an internal combustion vehicle having an internal combustion engine. Arrow FR, as appropriate in the drawings, indicates the vehicle traveling direction of the vehicle V shown in FIG. 1, arrow UP indicates the upper side of the vehicle V, and arrow RH indicates the right side when facing the vehicle traveling direction. Furthermore, in the following description, when up / down, front / rear, and left / right directions are used, these directions will indicate 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.

[0014] <Vehicle V Configuration> A vehicle V has a vehicle front compartment FA at the front of a cabin CA, which is the interior of the vehicle where an occupant P sits. As shown in FIG. 1 , the vehicle front compartment FA includes a front wheel 10, a power unit 20, and a vehicle front structure S.

[0015] The power unit section 20 is a drive device provided with a vehicle drive motor (not shown) that drives the front wheels 10, an inverter section, a transmission, a clutch, a drive shaft, etc. The power unit section 20 is configured to include a vehicle device provided with electrical components that are supplied with the high voltage generated in the inverter section. As shown in Figures 2(a) and 2(b), the power unit section 20 is surrounded by the frame structure section 100 of the vehicle front structure S, and is disposed on the vehicle upper side of the subframe 130, behind the radiator structure section 200.

[0016] <Configuration of the vehicle front structure S> The vehicle front structure S is configured to be symmetrical in the vehicle width direction. The vehicle front structure S includes a frame structure section 100, a radiator structure section 200, and a front trunk section 300.

[0017] <Regarding the frame structure 100> The frame structure 100 forms a framework extending in the width direction and the vertical direction of the vehicle in the front compartment FA of the vehicle. The frame structure 100 includes a main frame 110, an upper frame 120, a sub-frame 130, a bumper beam 140, a toe board 150, and an auxiliary beam BM.

[0018] (About Mainframe 110) The main frames 110 extend in the front-to-rear direction of the vehicle on both sides of the power unit section 20 in the vehicle width direction, and are provided in pairs on both sides in the vehicle width direction. The main frames 110 are connected at their front end to the rear side of the vehicle of the bumper beam 140. The rear end of the main frames 110 is connected to the toe board section 150 by welding or the like. The main frames 110 are formed from a highly rigid metal or the like and have a substantially rectangular closed cross-sectional shape.

[0019] (About Upper Frame 120) The upper frame 120 is formed in a U-shape above the main frame 110 and has an opening on the rear side of the vehicle when viewed from above. A front beam FB extending in the vertical direction of the vehicle is connected to the lower surface of the upper frame 120 on the outer side in the vehicle width direction at the front side of the vehicle. The upper frame 120 is connected to the front beam FB at an upper end of the vehicle and the main frame 110 is connected to the lower end of the vehicle. A rear end of the upper frame 120 is joined to the upper side of the vehicle of the toe board portion 150. The upper frame 120 is made of a highly rigid metal or the like, and has a substantially rectangular closed cross section.

[0020] (Regarding subframe 130) The subframe 130 extends in the front-to-rear direction of the vehicle on both sides of the vehicle width direction below the main frame 110. A radiator lower cross member 230, which will be described later, is connected to the front side of the subframe 130. The radiator lower cross member 230 is disposed rearward of the bumper beam 140. The subframe 130 is formed from a highly rigid metal or the like, and has a substantially rectangular closed cross section.

[0021] An auxiliary beam BM extending in the vehicle up-down direction is connected to the vehicle upper side surface of the subframe 130. The vehicle upper side of the auxiliary beam BM is engaged with the vehicle lower side surface of the main frame 110. The radiator structure 200 is fixed to the vehicle front side of the subframe 130 via a radiator lower cross member 230 (described later). The vehicle rear side of the subframe 130 is connected to the toe board 150 and the torque box TB. The subframe 130 may have a cradle frame structure on which the power unit section 20 and various components such as a front suspension lower arm (not shown) are mounted.

[0022] (About Bumper Beam 140) The bumper beam 140 extends in the vehicle width direction at the front of the vehicle and forms the framework of the front of the vehicle. The bumper beam 140 has a substantially rectangular closed cross-sectional shape and is made of metal or the like. The bumper beam 140 is joined by welding or the like to the front end portions of the main frames 110 on both sides in the vehicle width direction.

[0023] (About the toe board part 150) The toe board 150 is a partition wall that rises in the vehicle vertical direction at the front side of the cabin CA, separating the vehicle front compartment FA from the cabin CA. The toe board 150 is part of the framework that constitutes the vehicle front compartment FA, and is joined to the main frame 110 and the upper frame 120 by welding or the like. A torque box TB extending in the vehicle width direction is joined to the underside of the toe board 150 by welding or the like.

[0024] As described above, in the vehicle front structure S, the main frame 110, the upper frame 120, the subframe 130, the bumper beam 140, the front beam FB, and the auxiliary beam BM are joined together to form a strong framework having a lattice shape as the frame structure 100. Furthermore, the main frame 110, the upper frame 120, and the subframe 130 are joined to the toe board 150 and the torque box TB, so that the power unit 20 is disposed inside the strong frame structure 100 on the vehicle rear side of the radiator structure 200 and the front trunk 300.

[0025] <Regarding the radiator structure 200> The radiator structure 200 is provided on the vehicle front side of the vehicle front structure S and is surrounded by the frame structure 100. A front trunk section 300 (described later) is disposed above the vehicle of the radiator structure 200. As shown in Figures 3(a) to 3(c), the radiator structure 200 is configured to include a radiator unit section 210 as a radiator section, a radiator upper cross member 220, and a radiator lower cross member 230.

[0026] (Regarding the radiator unit 210) The radiator unit section 210 is disposed on the front side of the vehicle front structure S, inclined from the rear upper side of the vehicle toward the front lower side of the vehicle. The radiator unit section 210 is fixed to a radiator upper cross member 220 at the rear upper side of the vehicle, and slidably engaged with a radiator lower cross member 230 at the front lower side of the vehicle. The radiator unit section 210 includes a radiator 211, a radiator upper frame 212, and a radiator lower frame 213.

[0027] Radiator unit 210 is made of metal or other material and has a generally rectangular shape with its long sides extending in the vehicle width direction when viewed from the front of the vehicle. Radiator unit 210 is a heat exchange device having radiator upper frame 212 and radiator lower frame 213 around radiator 211.

[0028] As shown in Figures 3(a) and 3(c), the radiator upper frame 212 is provided to surround the upper side of the vehicle and both sides in the vehicle width direction of the radiator 211. A fixing part HL that can be broken in the event of a vehicle collision is provided on the rear side of the upper vehicle part of the radiator upper frame 212, and the radiator unit part 210 is connected to a rotating shaft AM (described later) via the fixing part HL. The fixing part HL is, for example, a holder formed in a substantially rectangular shape from metal or the like, and is connected to the radiator upper frame 212 and the radiator upper cross member 220 by welding, bolts, or the like.

[0029] The radiator lower frame 213 is provided below the radiator 211 and extends in the vehicle width direction. As shown in FIG. 3(b), the vehicle lower side of the radiator lower frame 213 has a shape that protrudes in an arc shape toward the vehicle lower side. The radiator lower frame 213 slidably abuts on a sliding inclined portion SL provided on a radiator lower cross member 230 (described later), and is fixed to the radiator lower cross member 230 by a locking member LM. The locking member LM is, for example, a holder made of metal or the like, and is joined to the radiator lower frame 213 and the radiator lower cross member 230 by welding, bolts, or the like.

[0030] (Radiator Upper Cross Member 220) As shown in Figures 2(a) and 2(b), the radiator upper cross member 220 is provided on the upper side of the radiator unit section 210, extending in the vehicle width direction. The radiator upper cross member 220 is joined to the main frame 110, which forms the skeleton of the vehicle, on the outer side in the vehicle width direction. A radiator upper frame 212 of the radiator unit section 210 is fixed to the radiator upper cross member 220 on the vehicle front side of the radiator upper cross member 220. The radiator upper cross member 220 is provided on the vehicle front side of the power unit section 20, and is disposed on the vehicle rear side of the radiator unit section 210. The radiator upper cross member 220 is formed from a highly rigid member such as metal, and has a substantially rectangular closed cross section.

[0031] As shown in FIG. 3(b), the radiator upper cross member 220 has a rotation axis AM on the vehicle front side of the radiator upper cross member 220, which allows the radiator unit section 210 to rotate in the longitudinal direction of the vehicle. Specifically, for example, the rotating shaft AM is a cylindrical rod made of a member such as metal. The rotating shaft AM extends in the vehicle width direction and is rotatably engaged with the vehicle front side of the radiator upper cross member 220. The radiator unit section 210 is fixed to the vehicle front side of the rotating shaft AM via a fixing part HL.

[0032] (Radiator lower cross member 230) The radiator lower cross member 230 extends in the vehicle width direction from the vehicle lower end of the radiator unit section 210, and both vehicle width direction end portions are joined to the vehicle front end portion of the sub-frame 130. As shown in FIG. 3(b), the radiator lower cross member 230 has a sliding inclined portion SL on the vehicle upper side of the radiator lower cross member 230 as an inclined portion that slopes from the upper front side of the vehicle toward the lower rear side of the vehicle. The radiator lower frame 213 of the radiator unit section 210 slidably abuts against the sliding inclined portion SL. The radiator lower cross member 230 and the radiator lower frame 213 slidably abut against each other at the sliding inclined portion SL and are fixed via a locking member LM.

[0033] <Regarding the front trunk section 300> The front trunk section 300 is formed from a member such as resin, and is provided on the upper front side of the vehicle of the radiator unit section 210, as shown in Figures 2(a) and 2(b). The front trunk section 300 has a first case section 310 as a first trunk case section provided on the rear side of the vehicle, and a second case section 320 as a second trunk case section provided on the front side of the vehicle of the first case section 310. The front trunk section 300 is a box-shaped storage box with an opening on the upper side of the vehicle, formed by combining the first case section 310 and the second case section 320 with their openings facing each other in the longitudinal direction of the vehicle. 4(b), a radiator engaging portion FK is provided on the upper side of the first case portion 310, which protrudes toward the rear of the vehicle and engages with the radiator unit portion 210 while covering the upper end of the radiator unit portion 210. The first case portion 310 and the second case portion 320 are rotatably engaged with each other by a trunk rotation axis AT extending in the vehicle width direction.

[0034] As shown in Fig. 4(c), the first case portion 310 has a U-shape with an opening on the vehicle front side when viewed from above the vehicle. As shown in Fig. 4(b), a radiator engagement portion FK is provided on the vehicle rear side of the first case portion 310, which engages with the vehicle upper end portion of the radiator unit portion 210. The vehicle lower portion of the radiator engagement portion FK is formed to have substantially the same shape as the vehicle upper front side of the radiator unit portion 210 so as to engage with the vehicle upper front side of the radiator unit portion 210. The second case portion 320 is rotatably engaged with the vehicle front side of the first case portion 310 by a trunk rotation axis AT. A cut inclination CL is provided at the vehicle front end portion of the first case portion 310 so that the first case portion 310 does not protrude toward the vehicle front from the vehicle front end portion of the second case portion 320 when the first case portion 310 rotates toward the vehicle front. In the first case portion 310, a space SP is provided as an air guide path for guiding cooling air to the radiator unit portion 210 between the radiator unit portion 210 and the vehicle lower bottom surface portion on the vehicle front side of the radiator engagement portion FK.

[0035] As shown in FIG. 4(c), the second case portion 320 has a U-shape with an opening on the rear side of the vehicle when viewed from above the vehicle. As shown in FIGS. 4(a) and 4(c), the second case portion 320 is disposed inside the first case portion 310 in the vehicle width direction, and a trunk rotation shaft AT is provided below the vehicle, penetrating the second case portion 320. The second case portion 320 is rotatably engaged with the first case portion 310 by the trunk rotation shaft AT. The trunk rotation shaft AT is a cylindrical rod made of a member such as metal. The trunk rotation shaft AT extends in the vehicle width direction, penetrates the second case portion 320, and is fixed to the first case portion 310.

[0036] <Actions and Effects> The operation of the vehicle front structure S according to this embodiment configured as described above when a collision occurs to the vehicle V will be described with reference to FIGS.

[0037] For example, as shown in FIG. 5, when an object CO collides with the front side of a vehicle V, collision energy is transmitted to a bumper beam 140 of the frame structure 100 in the direction indicated by an arrow AR1.

[0038] The collision energy transmitted to the bumper beam 140 is transmitted and dispersed to the main frame 110 and the upper frame 120, as shown by arrows AR2 and AR3 in Figure 6(a). The collision energy transmitted to the main frame 110 and the upper frame 120 crushes the main frame 110 and the upper frame 120 while crushing the bumper beam 140. The collision energy is absorbed by deformation in the main frame 110 and the upper frame 120.

[0039] Furthermore, when collision energy is transmitted to the bumper beam 140, the main frame 110 and the upper frame 120 are pushed toward the rear of the vehicle, causing the collision object CO to collide with the subframe 130 and the radiator lower cross member 230, and the collision energy is transmitted to and dispersed by the subframe 130 and the radiator lower cross member 230.

[0040] The collision energy transmitted to the subframe 130 and the radiator lower cross member 230 is transmitted in the direction indicated by the arrow AR4 in Figure 6(b), and the collision energy crushes the subframe 130 and pushes it toward the rear of the vehicle. The collision energy transmitted to the radiator lower cross member 230 is transmitted to the radiator unit section 210 and pushes the radiator unit section 210 toward the rear of the vehicle. Furthermore, as the colliding object CO presses against the front trunk section 300, the radiator unit section 210 is pushed by the front trunk section 300 in the direction indicated by the arrow AR5. On the other hand, the vehicle upper side of radiator unit section 210 is fixed to radiator upper cross member 220. Therefore, radiator unit section 210 starts to rotate in the direction indicated by arrow AR6 with radiator upper cross member 220 as a fulcrum.

[0041] At this time, the radiator upper cross member 220 has a rotation axis AM that allows the radiator unit section 210 to rotate in the vehicle longitudinal direction. Therefore, the radiator unit section 210 rotates without resistance around the rotation axis AM of the radiator upper cross member 220. As the radiator unit section 210 rotates in the direction indicated by the arrow AR6, the vehicle upper end of the radiator unit section 210 moves in a direction away from the power unit section 20.

[0042] Furthermore, when collision energy is transmitted to the subframe 130 and the radiator structure 200, the fixing portion HL fixing the radiator unit portion 210 to the radiator upper cross member 220 breaks, as shown in FIG. 6(c). The upper side of the radiator unit portion 210 moves in the direction indicated by arrow AR6. The lower side of the radiator unit portion 210 slides toward the rear of the vehicle along the sliding inclined portion SL in the direction indicated by arrow AR7. Then, the locking member LM fixing the radiator unit portion 210 to the radiator lower cross member 230 breaks. Then, the radiator unit portion 210 rises toward the upper side of the vehicle while rotating in the direction indicated by arrow AR6 with the radiator upper cross member 220 as a fulcrum.

[0043] Meanwhile, the front trunk section 300, which is engaged with the vehicle upper side of the radiator unit section 210 via the radiator engaging section FK, moves in accordance with the movement of the radiator unit section 210. As the radiator unit section 210 rises toward the vehicle upper side, the first case section 310 in the front trunk section 300 is lifted toward the vehicle upper side while rotating in the direction indicated by the arrow AR6. Because first case section 310 is rotatably engaged with second case section 320 by trunk rotation axis AT, first case section 310 and second case section 320 rotate about trunk rotation axis AT and enter a folded state. When front trunk section 300 is folded, front trunk section 300 reduces the collision energy transmitted to radiator unit section 210. Furthermore, when front trunk section 300 is folded, radiator unit section 210 and front trunk section 300 move in a direction away from power unit section 20, and do not interfere with power unit section 20.

[0044] The collision energy transmitted to the main frame 110, the upper frame 120, and the sub-frame 130 is absorbed by crushing the main frame 110 and the upper frame 120 and bending the sub-frame 130. Furthermore, the collision energy is transmitted to the toe board 150 and the torque box TB, which are connected to the main frame 110, the upper frame 120, and the sub-frame 130, and thereby dispersed.

[0045] When the input of the collision energy ends, the absorption of the collision energy by the deformation of the vehicle front structure S ends.

[0046] As described above, the collision energy is absorbed by the vehicle front structure S, which is made up of the main frame 110, the upper frame 120, the sub-frame 130, and the radiator structure 200, collapsing and deforming. Furthermore, the collision energy is dispersed and absorbed in the vehicle front compartment FA, which is formed by the main frame 110, the upper frame 120, the sub-frame 130, the toe board portion 150, and the torque box TB. Radiator unit section 210 of radiator structure 200 rotates around rotation axis AM of radiator upper cross member 220, and further moves in a direction away from power unit section 20 when front trunk section 300 is folded. As the upper end of radiator unit section 210 moves in a direction away from power unit section 20, radiator unit section 210 does not interfere with power unit section 20, which includes vehicle devices to which high voltage is supplied.

[0047] As described above, the vehicle front structure S of this embodiment is a vehicle front structure S having a radiator unit section 210 provided on the front side of the vehicle at an angle from the upper rear side of the vehicle toward the lower front side of the vehicle, and a front trunk section 300 provided on the vehicle front side of the radiator unit section 210, and the front trunk section 300 has a first case section 310 as a first trunk case section provided on the vehicle rear side, and a second case section 320 as a second trunk case section provided on the vehicle front side of the first case section 310, and a radiator engagement section FK is provided on the upper side of the first case section 310, which protrudes toward the vehicle rear side and engages with the radiator unit section 210 while covering the upper end of the vehicle of the radiator unit section 210, and the first case section 310 and the second case section 320 are rotatably engaged by a trunk rotation axis AT extending in the vehicle width direction. In other words, when a vehicle collision occurs and collision energy is transmitted to the radiator unit section 210, the vehicle lower side of the radiator unit section 210 is pushed toward the rear of the vehicle by the collision energy transmitted to the radiator lower cross member 230. The vehicle upper side of the radiator unit section 210 moves toward the vehicle front side, with the radiator upper cross member 220 as a fulcrum. Meanwhile, the front trunk section 300 is provided on the vehicle front side of the radiator unit section 210 and is engaged with the vehicle upper side of the radiator unit section 210 via the radiator engagement portion FK, so that the front trunk section 300 moves in accordance with the movement of the radiator unit section 210. As the radiator unit section 210 moves toward the upper side of the vehicle, the first case section 310 in the front trunk section 300 moves toward the front of the vehicle via the radiator engagement section FK and rises toward the upper side of the vehicle. At this time, the first case section 310 is rotatably engaged with the second case section 320 by the trunk rotation axis AT. As a result, the first case section 310 and the second case section 320 rotate about the trunk rotation axis AT and enter a folded state. Then, the radiator unit section 210 and the front trunk section 300 move in a direction away from the power unit section 20 in a folded state, further forward of the radiator upper cross member 220. Therefore, by folding the front trunk section 300, the front trunk section 300 can reduce the collision energy transmitted to the radiator unit section 210. Furthermore, by rotating the radiator unit section 210 toward the front of the vehicle and moving the upper end of the radiator unit section 210 in a direction away from the power unit section 20, the vehicle front structure S can prevent the radiator unit section 210 from interfering with the power unit section 20, which includes vehicle devices to which high voltage is supplied. Therefore, when a vehicle collision occurs, the radiator portion can be prevented from interfering with vehicle devices.

[0048] In the vehicle front structure S of this embodiment, a radiator upper cross member 220 is provided on the upper side of the radiator unit section 210, extending in the vehicle width direction. The radiator upper cross member 220 is fixed to the main frame 110, which forms the skeleton of the vehicle, on the outer side in the vehicle width direction and is connected to the radiator unit section 210 at the front of the vehicle, and at the lower end of the radiator unit section 210, a radiator lower cross member 230 is provided, extending in the vehicle width direction, and has a sliding inclined section SL on the upper side of the vehicle as an inclined section extending from the front of the upper part of the vehicle to the rear of the lower part of the vehicle, with the radiator unit section 210 slidably abutting against the sliding inclined section SL. In other words, when a collision occurs with the vehicle and collision energy is transmitted to the radiator unit section 210, the radiator unit section 210 is pushed toward the rear of the vehicle from the underside of the vehicle by the collision energy transmitted to the radiator lower cross member 230, and rotates toward the front of the vehicle with the radiator upper cross member 220 as a fulcrum. Furthermore, when collision energy is transmitted to the radiator unit section 210, the vehicle lower side of the radiator unit section 210 slides toward the vehicle rear along the sliding inclined section SL. The vehicle upper side of the radiator unit section 210 moves toward the vehicle front side with the radiator upper cross member 220 as a fulcrum. Therefore, the vehicle lower side of the radiator unit section 210 moves from the upper side of the vehicle toward the rear side of the lower part of the vehicle along the sliding inclined section SL, and the vehicle upper side of the radiator unit section 210 moves toward the front side of the vehicle, so that the vehicle front structure S can move the radiator unit section 210 in a direction away from the power unit section 20. Then, the vehicle front structure S can reliably prevent the radiator unit section 210 from interfering with the power unit section 20, which includes vehicle devices to which high voltage is supplied. Therefore, when a vehicle collision occurs, the radiator portion can be prevented from interfering with vehicle devices.

[0049] In the vehicle front structure S of this embodiment, the radiator upper cross member 220 has a rotation axis AM that extends in the vehicle width direction and is rotatable in the fore-and-aft direction of the vehicle, and the radiator unit section 210 is connected to the rotation axis AM. In other words, when a collision occurs with the vehicle and the radiator unit section 210 is pushed toward the rear of the vehicle, the radiator unit section 210 starts to rotate toward the front of the vehicle with the radiator upper cross member 220 as a fulcrum. At this time, the rotation axis AM is provided in the radiator upper cross member 220, so that the radiator unit section 210 easily rotates toward the front of the vehicle. Therefore, by allowing the radiator unit section 210 to rotate toward the front of the vehicle and the upper end of the radiator unit section 210 to easily move away from the power unit section 20, the vehicle front structure S can reliably prevent the radiator unit section 210 from interfering with the power unit section 20, which includes vehicle devices that are supplied with high voltage. Therefore, when a vehicle collision occurs, the radiator portion can be prevented from interfering with vehicle devices.

[0050] In the vehicle front structure S according to this embodiment, the radiator unit section 210 has a fixing part HL that can be broken when a collision occurs to the vehicle V, and the radiator unit section 210 is connected to the rotation axis AM at the fixing part HL. In other words, when a vehicle collision occurs and the radiator unit section 210 is pushed toward the rear of the vehicle, the radiator unit section 210 starts to rotate toward the front of the vehicle around the rotation axis AM. Furthermore, when the collision energy is transmitted to the subframe 130 and the radiator structure section 200, the fixing section HL that fixes the radiator unit section 210 to the radiator upper cross member 220 breaks. Then, the upper side of the radiator unit section 210 moves toward the upper side of the vehicle along the radiator upper cross member 220 and rises toward the upper side of the vehicle. Therefore, by moving the radiator unit section 210 toward the upper side of the vehicle and the upper end of the radiator unit section 210 moving in a direction away from the power unit section 20, the vehicle front structure S can reliably prevent the radiator unit section 210 from interfering with the power unit section 20, which includes vehicle devices that are supplied with high voltage. Therefore, when a vehicle collision occurs, the radiator portion can be prevented from interfering with vehicle devices.

[0051] The above describes an embodiment of the present invention in detail 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]

[0052] 20: Power unit section 100: Frame structure 110;Mainframe 120;Upper frame 130;Subframe 140; bumper beam 150;Toe board section 200: Radiator structure 210: Radiator unit 211; Radiator 212; Radiator upper frame 213: Radiator lower frame 220; Radiator upper cross member 230; Radiator lower cross member 300; Front trunk 310: First case part 320; Second case part AM: Rotation axis CA; Cabin FA; Front compartment of vehicle HL;Fixed part LM;Locking member SL: Sliding inclined part S: Front structure of vehicle V; Vehicle

Claims

1. A vehicle front structure including: a radiator unit provided at the front of the vehicle, inclined from an upper rear side of the vehicle toward a lower front side of the vehicle; and a front trunk provided at the front of the vehicle of the radiator unit, The front trunk section is a first trunk case portion provided on the rear side of the vehicle, and a second trunk case portion provided on the front side of the vehicle of the first trunk case portion, a radiator engaging portion that projects toward the rear of the vehicle and engages with the radiator unit portion while covering an upper end of the radiator unit portion, on an upper side of the first trunk case portion; A vehicle front structure, characterized in that the first trunk case portion and the second trunk case portion are rotatably engaged with each other by a trunk rotation shaft extending in the vehicle width direction.

2. a radiator upper cross member is provided at an upper portion of the radiator unit so as to extend in the vehicle width direction, the radiator upper cross member being fixed to a main frame forming a skeleton of the vehicle on an outer side in the vehicle width direction and being connected to the radiator unit on a front side of the vehicle; 2. The vehicle front structure according to claim 1, wherein a radiator lower cross member is provided extending in the vehicle width direction at the lower end of the radiator unit portion, the radiator lower cross member having an inclined portion on the upper side of the vehicle extending from the front upper side of the vehicle toward the rear lower side of the vehicle, and the radiator unit portion is slidably abutted against the inclined portion.

3. The vehicle front structure described in claim 2, characterized in that the radiator upper cross member has a rotation axis extending in the vehicle width direction and capable of rotating in the vehicle fore-and-aft direction, and the radiator unit portion is connected to the rotation axis.

4. 4. The vehicle front structure according to claim 3, wherein the radiator unit has a fixing portion that can be broken when a vehicle collision occurs, and the radiator unit is connected to the rotating shaft at the fixing portion.

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