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 pair of sub frames 130 extending in a longitudinal direction of a vehicle on a lower side of the vehicle of a main frame 110, at both sides in a width direction of the vehicle; a radiator unit part 210 which is arranged at a front side of the vehicle of the sub frames 130, and in which radiator unit fixing parts 213 as fixing parts are provided at the lower side of the vehicle; and radiator unit control structure parts 220 which are arranged at least at the front side part of the vehicle in the sub frames 130 at one side in the width direction of the vehicle, extend in the longitudinal direction of the vehicle to be joined to the radiator unit fixing parts 213 at the front side of the vehicle, and are slidably engaged with the sub frames 130 at a rear side 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 comprising: a pair of subframes extending in the fore-and-aft direction of the vehicle on both sides of the vehicle width direction below a main frame extending in the fore-and-aft direction of the vehicle on both sides of the vehicle width direction; a radiator unit section arranged on the front side of the subframes and having a fixing section on the underside of the vehicle; a radiator upper cross member extending in the vehicle width direction and fixed to the upper side of the rear of the vehicle of the radiator unit section; and a radiator unit control structure section arranged on the front side of the vehicle of the subframes on at least one side of the vehicle width direction, extending in the fore-and-aft direction of the vehicle, connected to the fixing section on the front side of the vehicle, and slidably engaged with the subframe on the rear side of the vehicle. [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 a radiator unit control structure 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 time series in the 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 portion 100 and a radiator structure portion 200.

[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 extends in the front-to-rear direction of the vehicle above the main frame 110. The upper frame 120 is inclined from the upper rear side of the vehicle toward the front side of the lower vehicle, and the front end of the upper frame 120 is joined to the upper surface of the front part of the vehicle of the main frame 110. The rear end of the upper frame 120 is joined to the upper side of the vehicle of the toe board section 150. The upper frame 120 is formed from a highly rigid metal or the like and has a substantially rectangular closed cross-sectional shape.

[0020] (Regarding subframe 130) The subframes 130 extend in the front-to-rear direction of the vehicle below the main frame 110 on both sides in the vehicle width direction. The subframes 130 are U-shaped with an opening on the rear side of the vehicle when viewed from above the vehicle. The front side of the subframe 130 is disposed rearward of the bumper beam 140. The subframe 130 is made of a highly rigid metal or the like and has a substantially rectangular closed cross-sectional shape.

[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. A radiator structure 200 is fixed to the vehicle front side of the subframe 130 via a radiator unit control structure 220 and a radiator unit fixing portion 213, which will be 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] The subframe 130 is provided with a weak portion WP that bends the subframe 130 when a collision occurs with the vehicle V. The upper side of the weak portion WP is formed to have lower rigidity than the lower side of the weak portion WP. Specifically, for example, the upper side of the subframe 130 is provided with a V-shaped groove extending in the vehicle width direction as the weak portion WP.

[0023] A radiator unit control structure 220, which will be described later, is fixed to the subframe 130 on the vehicle front side of the weak part WP by a breakable bolt BT.

[0024] (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.

[0025] (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.

[0026] As described above, in the vehicle front structure S, the main frame 110, the upper frame 120, the subframe 130, the bumper beam 140, 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.

[0027] <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. 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 unit control structure section 220, and a radiator upper cross member 230.

[0028] (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 upper rear side of the vehicle toward the front side of the lower part of the vehicle. As shown in Fig. 3(b), the radiator unit section 210 is engaged with the radiator upper cross member 230 at the upper rear side of the vehicle so as to be rotatable in the longitudinal direction of the vehicle. The radiator unit section 210 is fixed to the radiator unit control structure section 220 via a radiator unit fixing section 213 at the front side of the lower part of the vehicle. The radiator unit section 210 includes a radiator 211 , a radiator frame 212 , and a radiator unit fixing section 213 .

[0029] 3(a), the radiator unit section 210 is a heat exchange device formed in a substantially rectangular shape with long sides in the vehicle width direction when viewed from the front of the vehicle, and having a radiator frame 212 around a radiator 211. On both sides of the radiator frame 212 in the vehicle width direction, under the vehicle, radiator unit fixing sections 213 are provided as fixing sections for fixing the radiator unit section 210 to the radiator unit control structure section 220. The radiator frame 212 and the radiator unit fixing portion 213 are formed from a highly rigid member such as metal.

[0030] (Regarding the radiator unit control structure 220) 2(a), the radiator unit control structure 220 is disposed on the front side of the vehicle of the subframe 130 on at least one side in the vehicle width direction, and extends in the longitudinal direction of the vehicle. The radiator unit control structure 220 has a radiator unit fixing portion 213 as a fixing portion connected to a radiator unit fitting portion 221 on the front side of the vehicle, and is slidably engaged with the subframe 130 on the rear side of the vehicle. The radiator unit control structure 220 is formed from a member such as a metal having high rigidity. Specifically, the radiator unit control structure 220 extends from the front side of the vehicle to the rear side of the vehicle when viewed from above the vehicle, as shown in Fig. 4(c), for example. On the front side of the vehicle, the radiator unit control structure 220 is provided with a radiator unit fitting portion 221 into which the radiator unit fixing portion 213 of the radiator unit portion 210 is fitted, as shown in Figs. 4(a) to 4(c).

[0031] The radiator unit fitting portion 221 is provided on the vehicle front side of the radiator unit control structure portion 220. For example, a through hole FH extending in the vertical direction of the vehicle is provided in the radiator unit fitting portion 221, and the vehicle upper side surface portion of the radiator unit fitting portion 221 is formed in a substantially flat shape. The radiator unit fixing portion 213 is fitted into the radiator unit fitting portion 221 and firmly joined by welding or the like.

[0032] A subframe sliding part 222 is provided on the vehicle rear side of the radiator unit control structure 220, bending outward in the vehicle width direction and protruding toward the vehicle bottom. As shown in Figures 4(a) and 4(b), the subframe sliding part 222 protrudes toward the vehicle bottom. A sliding through hole SH is provided in the subframe sliding part 222 in the vehicle front-rear direction. The sliding through hole SH has a substantially rectangular shape that allows the subframe 130 to pass through. Furthermore, bolt holes BH are provided in the vehicle vertical direction on the underside of the vehicle of the sub-frame sliding part 222. The radiator unit control structure part 220 is provided so that the sub-frame 130 passes through the sub-frame sliding part 222, and is fixed to the sub-frame 130 by bolts BT.

[0033] (Radiator Upper Cross Member 230) The radiator upper cross member 230 extends in the vehicle width direction and is fixed to the upper rear side of the radiator unit portion 210 of the vehicle. Specifically, for example, as shown in Fig. 2(a), the radiator upper cross member 230 extends between the main frames 110 on both sides in the vehicle width direction, and the outer end of the radiator upper cross member 230 in the vehicle width direction is joined to the main frames 110 on both sides in the vehicle width direction by welding or the like. The radiator upper cross member 230 is provided on the vehicle front side of the power unit section 20, and is fixed to the vehicle rear side of the radiator unit section 210. The radiator upper cross member 230 is formed from a highly rigid member such as metal, and has a substantially rectangular closed cross-sectional shape.

[0034] As shown in FIG. 2(b), the radiator upper cross member 230 has a rotation axis AM on the vehicle front side of the radiator upper cross member 230, 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 230. The radiator unit section 210 is fixed to the vehicle front side of the rotating shaft AM.

[0035] As described above, the vehicle front structure S has a strong framework formed by joining the main frame 110, the upper frame 120, the subframe 130, the bumper beam 140, the radiator upper cross member 230, and the auxiliary beam BM. 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 section 20 is disposed inside the strong vehicle front structure S on the vehicle rear side of the radiator structure section 200.

[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, as shown in Fig. 6(b), the main frame 110 and the upper frame 120 are pushed toward the rear of the vehicle, causing the colliding object CO to collide with the subframe 130 and the radiator structure 200. The collision energy is transmitted to and dispersed by the subframe 130 and the radiator structure 200.

[0040] The collision energy transmitted to the subframe 130 is transmitted in the direction indicated by the arrow AR4, and the collision energy pushes the subframe 130 toward the rear of the vehicle while crushing it. The collision energy transmitted to the radiator structure 200 is transmitted in the direction indicated by arrow AR5, and the collision energy pushes the radiator unit section 210 and the radiator unit control structure section 220 in the radiator structure 200 toward the rear of the vehicle. As the radiator unit control structure section 220 is pushed toward the rear of the vehicle, the radiator unit section 210 begins to move with the radiator upper cross member 230 as a fulcrum.

[0041] The bolts BT are broken by the radiator unit control structure 220 being pushed in the direction indicated by the arrow AR5. As the bolts BT are broken, the radiator unit control structure 220 slides along the subframe 130 in the direction indicated by the arrow AR5. Then, the vehicle underside of the radiator unit section 210, which is coupled to the radiator unit control structure 220, is pushed in the direction indicated by the arrow AR5. On the other hand, the vehicle upper side of the radiator unit section 210 is fixed to the radiator upper cross member 230. Therefore, the radiator unit section 210 starts to rotate toward the vehicle lower side with the radiator upper cross member 230 as a fulcrum.

[0042] Furthermore, when collision energy is transmitted to the subframe 130 and the radiator structure 200, as shown in FIG. 6(c), the auxiliary beam BM detaches from the main frame 110, and the subframe 130 bends in the direction of arrow AR6 at the weakened portion WP provided in the subframe 130. The auxiliary beam BM detaches from the main frame 110. At this time, the radiator unit control structure 220 is engaged with the subframe 130 on the vehicle front side of the weakened portion WP. Therefore, even in a bent state of the subframe 130, the radiator unit control structure 220 slides in the direction indicated by arrow AR5. Then, as the radiator unit control structure 220 slides along the subframe 130 toward the rear of the vehicle, the radiator unit section 210 moves toward the bottom of the vehicle.

[0043] At this time, the radiator upper cross member 230 has a rotation axis AM that allows the radiator unit section 210 to rotate in the longitudinal direction of the vehicle. Therefore, the radiator unit section 210 rotates without resistance in the direction indicated by arrow AR7 around the rotation axis AM of the radiator upper cross member 230. As the radiator unit section 210 rotates in the direction indicated by arrow AR7, the vehicle upper end of the radiator unit section 210 rises in the vertical direction of the vehicle and moves away from the 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 crushing and deformation of the vehicle front structure S, which is constituted by the main frame 110, the upper frame 120, the subframe 130, and the radiator structure 200. Furthermore, the collision energy is dispersed and absorbed in the vehicle front compartment FA, which is constituted by the main frame 110, the upper frame 120, the subframe 130, the toe board 150, and the torque box TB. The radiator unit 210 in the radiator structure 200 moves with the radiator upper cross member 230 as a fulcrum and rotates around the rotation axis AM of the radiator upper cross member 230. The radiator unit control structure 220, which is coupled to the vehicle underside of the radiator unit 210, slides toward the vehicle rear along the subframe 130. The upper end of the radiator unit 210 rises in the vehicle vertical direction, and the radiator unit 210 moves in a direction away from the power unit 20. Therefore, the radiator unit 210 does not interfere with the power unit 20, which includes vehicle devices that are supplied with high voltage.

[0047] As described above, the vehicle front structure S of this embodiment comprises a pair of subframes 130 extending in the fore-and-aft direction of the vehicle on both sides of the vehicle width direction below the main frame 110, which extends in the fore-and-aft direction of the vehicle on both sides of the vehicle width direction; a radiator unit section 210 arranged on the front side of the subframe 130 and having a radiator unit fixing section 213 as a fixing section on the underside of the vehicle; a radiator upper cross member 230 extending in the vehicle width direction and fixed to the upper side of the rear of the vehicle of the radiator unit section 210; and a radiator unit control structure section 220 arranged on the front side of the vehicle of the subframe 130 on at least one side of the vehicle width direction, extending in the fore-and-aft direction of the vehicle, connected to the radiator unit fixing section 213 on the front side of the vehicle and slidably engaged with the subframe 130 on the rear side of the vehicle. In other words, when a vehicle collision occurs, the collision energy is transmitted to the bumper beam 140, and then transmitted and dispersed to the main frame 110 and the upper frame 120. As the main frame 110 and the upper frame 120 are pushed toward the rear of the vehicle, the colliding object CO collides with the subframe 130 and the radiator structure 200, and the collision energy is transmitted to the subframe 130 and the radiator structure 200. The collision energy pushes the radiator unit control structure 220 in the radiator structure 200 toward the rear of the vehicle and breaks the bolts BT, causing the radiator unit control structure 220 to slide along the subframe 130 toward the rear of the vehicle. Because the vehicle underside of radiator unit section 210 is connected to radiator unit control structure section 220 via radiator unit fixing section 213, the vehicle underside of radiator unit section 210 is pushed toward the rear of the vehicle. On the other hand, the vehicle upper side of radiator unit section 210 is fixed to radiator upper cross member 230. Therefore, radiator unit section 210 starts to rotate toward the vehicle underside, with radiator upper cross member 230 as a fulcrum. Therefore, by rotating the radiator unit section 210 and moving the upper end of the vehicle 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 that are supplied with high voltage. 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, the subframe 130 is provided with a weak part WP that bends the subframe 130 when a collision occurs with the vehicle V, and the radiator unit control structure part 220 is engaged with the subframe 130 further forward of the vehicle than the weak part WP. In other words, when a collision occurs in the vehicle V, collision energy is transmitted to the subframe 130 and the radiator structure 200. The subframe 130 bends toward the bottom of the vehicle at the weak points WP provided in the subframe 130. At this time, because the radiator unit control structure 220 is engaged with the subframe 130 on the vehicle front side of the weak points WP, the radiator unit control structure 220 slides toward the rear of the vehicle even when the subframe 130 is bent. Therefore, in the vehicle front structure S, the radiator unit control structure portion 220 slides toward the rear of the vehicle along the subframe 130, so that the radiator unit portion 210 serving as the radiator portion can move toward the lower side of the vehicle even when the subframe 130 is bent. Then, as the radiator unit portion 210 moves toward the lower side of the vehicle, the vehicle front structure S can move the radiator unit portion 210 in a direction away from the power unit portion 20. 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 230 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 230 as the fulcrum. At this time, the rotation axis AM is provided in the radiator upper cross member 230, 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] 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]

[0051] 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 220: Radiator unit control structure 230; Radiator upper cross member AM; Rotation axis CA; Cabin FA; Front compartment of vehicle S: Front structure of vehicle V; Vehicle WP; vulnerable area

Claims

1. a pair of subframes extending in the front-rear direction of the vehicle on both sides in the vehicle width direction below a main frame extending in the front-rear direction of the vehicle on both sides in the vehicle width direction; a radiator unit disposed on the vehicle front side of the subframe and having a fixing portion provided on the vehicle underside; a radiator upper cross member extending in the vehicle width direction and fixed to an upper side of the rear portion of the vehicle of the radiator unit; a radiator unit control structure disposed on at least one vehicle width direction side of the subframe at a front side of the vehicle, extending in a front-to-rear direction of the vehicle, coupled to the fixing portion at the vehicle front side, and slidably engaged with the subframe at the vehicle rear side; A vehicle front structure comprising:

2. The subframe is provided with a weak portion that bends the subframe when a vehicle collision occurs, 2. The vehicle front structure according to claim 1, wherein the radiator unit control structure is engaged with the subframe at a position closer to the front of the vehicle than the weak portion.

3. The vehicle front structure described in claim 1 or 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.

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