JP2020006730A - Vehicle front part structure - Google Patents

Abstract

To make a suspension member less likely to collide with a battery unit and break a battery during a vehicle frontal collision in a case that the battery unit is provided under a floor.SOLUTION: A battery unit 18 is disposed under a floor of a vehicle cabin 22 and a battery side extension 50 is provided protruding on a case front part lower surface of the battery unit 18. Members side extensions 34, 34 are provided protruding at a position, facing the battery side extension 50 in a vehicle fore and aft direction, of a rear end edge of a suspension member 16.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle front structure.

  A battery unit is mounted on an electric vehicle or the like that uses a rotating electric machine as a driving source. For example, in Patent Literature 1, a battery unit is mounted below the floor of a vehicle compartment (below the floor).

  In terms of the circuit, a power conversion unit including a DC / DC converter for performing step-up / step-down and an inverter for performing AC / DC conversion is provided between the rotating electric machine and the battery unit. The rotating electric machine and the power conversion unit are mounted in an engine compartment in front of the vehicle.

  Further, front wheels are provided on both sides of the engine compartment, and a suspension member which is a frame member for suspending the front wheels is provided below the engine compartment. When the battery unit is mounted below the floor, the suspension member is disposed in front of the battery unit.

International Publication No. WO 2014/034377

  By the way, at the time of a frontal collision of the vehicle (hereinafter, appropriately referred to as a front collision), the suspension member is pushed by an obstacle and retreated. At this time, the suspension member may collide with the battery unit, which may lead to breakage of the battery unit. Therefore, an object of the present invention is to provide a vehicle front structure capable of avoiding a collision between a suspension member and a battery unit during a front collision.

  The present invention relates to a vehicle front structure. The vehicle front structure is a vehicle front structure including a battery unit provided below a floor of a vehicle compartment, and a suspension member provided in front of the battery unit and forward of the battery unit, At least one of the lower surfaces of the dash panel lower and the floor panel constituting the floor, forward of the front surface of the battery unit, is provided with a floor-side expansion member having a front end slope whose lower side is located rearward, and is provided with a protrusion. A battery-side expansion member having a front end inclined surface whose lower side is located rearward is protruded below the front-side floor-side expansion member, and the floor-side expansion member at the rear end edge of the suspension member and the vehicle front-rear direction. A member-side expansion member having a rear end slope whose lower side is located on the rear side protrudes at a position opposed to the member.

  According to the above configuration, when the suspension member is retracted during a front collision, the member-side expansion member and the floor-side expansion member first collide. When the suspension member further retreats, the member-side expansion member collides with the battery-side expansion member, and the rear surface of the suspension member moves downward, so that collision with the battery unit can be avoided. .

  In the above invention, the lower end of the floor-side expansion member may be located below the upper end of the battery-side expansion member.

  According to the above configuration, after the floor-side expansion member collides with the member-side expansion member, the suspension member enters downward and rearward (obliquely downward) along the inclination of the opposing surface, and the floor-side expansion member is Can be lifted. Thereby, the slope of the member-side expansion member and the slope of the battery-side expansion member face each other, and both slide, so that it is possible to prevent collision between the suspension member and the battery unit.

  In the above invention, the opposing surfaces of the member-side expanding members may be inclined more horizontally than the opposing surfaces of the pair of floor-side expanding members.

  Due to the support structure of the suspension member, there is a case where the rear end of the suspension member is tilted downward at the time of a front collision, that is, the suspension member is retracted such that the opposing surface of the member-side expansion member faces downward. Therefore, by previously laying the opposing surface of the member-side expanding member more horizontally than the opposing surface of the floor-side expanding member, when the suspension member retreats, the opposing surface of the member-side expanding member and the opposing surface of the floor-side expanding member. And can be parallel.

  A vehicle front structure according to another aspect of the present invention includes a vehicle including a battery unit provided below a floor of a vehicle compartment, and a suspension member provided in front of the battery unit in front of the vehicle room. A battery-side expansion member having a front end slope with a lower side positioned rearward is provided at a front portion of the battery unit, and the battery-side expansion member at a rear end edge of the suspension member and a vehicle are provided. A member-side expansion member having a rear end slope whose lower side is located on the rear side is protruded at a position facing the front-rear direction.

  According to the above configuration, when the suspension member moves rearward, the member-side expansion member collides with the battery-side expansion member, and the suspension member moves downward and rearward (obliquely downward) along the slope of the opposing surface. ) Enter. This makes it possible to prevent the collision between the suspension member and the battery unit.

  Further, in the above invention, the battery unit includes a battery group and a case for housing the battery group, wherein the battery-side expansion member is provided on a lower surface of a front portion of the case, and the battery-side expansion member in the case is provided. Is preferably hollow.

  According to the above configuration, when the member-side expansion member and the battery-side expansion member collide, even if the case is deformed, no components are mounted on the case, so that the shock can be absorbed without damaging the components.

  According to the present invention, it is possible to avoid collision between the suspension member and the battery unit during a front collision.

It is a perspective view which illustrates the vehicle front structure concerning this embodiment. It is an exploded perspective view which illustrates the vehicle front structure concerning this embodiment. It is a perspective view which illustrates the back part of the vehicle front structure concerning this embodiment. It is AA side sectional drawing of FIG. It is a side view explaining the behavior of the suspension member at the time of a front collision. It is a side view (1/2) explaining the state of the periphery of the member side extension at the time of a front collision, the floor side extension, and the battery side extension. It is a side view (2/2) explaining the situation around the member side extension at the time of a front collision, the floor side extension, and the battery side extension. It is a figure showing signs that the upper part of a battery unit was opened. It is a figure showing connection of a suspension member and a body side using a bracket. It is a side view which illustrates the vehicle front structure which concerns on another aspect of this embodiment.

  FIG. 1 illustrates a perspective view of a vehicle front structure according to the present embodiment, and FIG. 2 illustrates an exploded perspective view thereof.

  1 to 10, the vehicle front-rear direction is indicated by an axis represented by a symbol FR, the vehicle width direction (vehicle width direction) is indicated by an axis represented by a symbol RW, and the vertical direction is represented by a symbol UP. Axis. The symbol FR is an abbreviation for Front, and the front-rear direction axis FR assumes the forward direction of the vehicle as the forward direction. The symbol RW is an abbreviation for Right Width, and the width direction axis RW has the right width direction as the positive direction. In addition, the height axis UP has the upward direction as the positive direction.

  As shown in FIG. 1, these FR axis, RW axis, and UP axis are orthogonal to each other. Hereinafter, when describing the vehicle front structure according to the present embodiment, description will be appropriately made based on these three axes. For example, “front end” refers to an end of any member on the positive side of the FR axis, and “rear end” refers to an end of any member on the negative side of the FR axis. The “width inside” indicates the inside relatively in the width direction of the vehicle along the RW axis, and the “outside width” indicates the outside relatively in the width direction of the vehicle along the RW axis. Unless otherwise specified, the "width direction" refers to the vehicle width direction. Further, “upper side” indicates a relatively positive side of the UP axis, and “lower side” relatively indicates a negative side of the UP axis.

  The vehicle front structure shown in FIGS. 1 and 2 is mounted on an electric vehicle that uses a rotating electric machine 10 as a drive source. The vehicle front structure includes front side members 12, 12, a high-voltage system assembly 14, a suspension member 16, and a battery unit 18.

  The front side members 12, 12 are a pair of frame members provided on both sides (left and right) in the width direction of the vehicle, and each extend rearward from the front end of the vehicle. For example, the front side members 12, 12 extend from the engine compartment 20 at the front of the vehicle to the front part of the cabin 22 (cabin) at the rear thereof.

  The high-voltage system assembly 14 and the suspension member 16 are mounted in the engine compartment 20. The high voltage system assembly 14 is an assembly in which a plurality of high voltage devices are assembled. The high-voltage system assembly 14 is configured such that the rotating electric machine 10, the charger 24, and the power conversion unit 26 are assembled to the compartment cloth 28.

  The rotating electric machine 10 is a driving source of the vehicle, and is assembled, for example, below the compartment cloth 28. The rotating electric machine 10 is composed of, for example, a permanent magnet type synchronous motor.

  The charger 24 and the power conversion unit 26 are assembled above the compartment cloth 28. The charger 24 is connected to, for example, a charging connector (not shown), and can be charged from a charging stand outside the vehicle.

  The power conversion unit 26 is connected between the rotating electric machine 10 and the battery unit 18 and performs power conversion. For example, the power conversion unit 26 is configured to include an inverter for performing AC / DC conversion of power and a DC / DC converter for performing boost / drop of power. The power conversion unit 26 accommodates, for example, an inverter and a DC / DC converter in a rectangular parallelepiped case. Further, a high voltage cable 30 connected to the battery unit 18 is connected to the rear surface of the case. A high-voltage cable (not shown) connected to the rotating electric machine 10 is connected to a bottom surface of the case.

  The compartment cloth 28 is a skeletal member fixed to the pair of left and right front side members 12. The compartment cloth 28 is, for example, a substantially square-shaped frame member, and has an opening vertically penetrating at the center. A high-voltage cable (not shown) connecting the rotating electric machine 10 and the power conversion unit 26 is routed in this opening.

  The rotating electric machine 10, the charger 24, and the power conversion unit 26 are assembled to the compartment cloth 28 to form the high-voltage system assembly 14. In the vehicle assembly process, the high-voltage system assembly 14 is lifted up from below, for example. After the upper and lower positions of the compartment cloth 28 and the front side members 12 and 12 are matched, the compartment cloth 28 is fastened to the front side members 12 and 12 by a bracket (not shown). By this assembly, the power conversion unit 26 is disposed above the front side member 12 as illustrated in FIG.

  The suspension member 16 is arranged below the high voltage system assembly 14 including the power conversion unit 26. Further, as shown in FIG. 1, the suspension member 16 is provided in front of the battery unit 18. That is, the suspension member 16 has a positional relationship such that the height position (the vertical position) is aligned with the battery unit 18.

  The suspension member 16 is a frame member for suspending a front wheel (not shown). The suspension member 16 has a substantially cross-girder shape, and has a shape in which both sides in the width direction of the front end and both sides in the width direction of the rear end project outward in the width direction. Support members 32A and 32B are fastened to both sides of the protruding front end and rear ends. The support members 32A and 32B are also fastened to the bottom surface of the front side member 12. That is, the suspension member 16 is suspended and supported by the front side member 12 via the support members 32A and 32B.

  At the rear end of the suspension member 16, a pair of member-side extensions 34, 34 (member-side expansion members) are provided. As illustrated in FIG. 4, the member-side extension 34 is attached from the upper rear end 16 </ b> A of the suspension member 16 to the rear upper end 16 </ b> B, and is fastened to the rear end of the suspension member 16 in a hook shape.

  For example, the member-side extension 34 is a substantially box-shaped rigid member made of a metal material such as aluminum, and a closed cross-sectional structure is formed by covering the opening of the box with the upper rear end 16A and the upper rear end 16B of the suspension member 16. Is done.

  The member-side extension 34 may be fastened to the suspension member 16 by a fastening member such as a bolt or a nut, or may be joined to the suspension member 16 by welding or the like. Further, the member-side extension 34 may be formed by processing as a part of the suspension member 16, that is, by processing the rear end so as to protrude upward.

  The member-side extension 34 protrudes upward from the upper surface of the suspension member 16. As illustrated in FIG. 1, the member-side extensions 34, 34 are located at positions on the rear end edge 16 </ b> C of the suspension member 16 that face the floor-side extensions 36, 36 (floor-side expansion members) in the vehicle front-rear direction. Be placed. The suspension member 16 extends rearward on both sides in the vehicle width direction to form an extended portion 16D. Therefore, the rear end edge 16C of the suspension member 16 provided with the member-side extensions 34, 34 is located on the front side with respect to the extended portion 16D of the rear edge on both sides in the vehicle width direction. Referring to FIG. 4, a ridgeline defining a boundary between the upper rear end 16A and the upper rear end 16B of suspension member 16, and member-side extensions 34, 34 are arranged on the ridgeline. Referring to FIG. 3, member-side extensions 34, 34 are provided along the vehicle width direction so as to sandwich high-voltage cable 30.

  Referring to FIG. 4, a member-side extension 34 is formed with a facing surface 34 </ b> A that faces floor-side extension 36 in the vehicle front-rear direction. The facing surface 34A is an inclined surface that is inclined downward toward the rear of the vehicle. As will be described later, by making the opposed surface 34A an inclined surface, the suspension member 16 can be dropped below the vehicle at the time of a front collision.

  The inclination angle θ1 of the facing surface 34A of the member-side extension 34 with respect to the horizontal plane is configured to be larger than the inclination angle θ2 of the facing surface 36A of the floor-side extension 36 with respect to the horizontal plane. In other words, the facing surface 34A of the member-side extension 34 is inclined more horizontally than the facing surface 36A of the floor-side extension 36.

  In this manner, by forming the opposing surface 34A of the member-side extension 34 more horizontally than the opposing surface 36A of the floor-side extension 36, the rear end of the suspension member 16 at the time of a front collision is lowered as described later. When the facing surface 34A of the member-side extension 34 faces downward, the facing surface 36A of the floor-side extension 36 and the facing surface 34A of the member-side extension 34 are aligned in parallel in a side view.

  Referring to FIG. 1, a passenger compartment 22 is defined by a floor panel 38 and a dash panel 40. The dash panel 40 includes a dash panel upper 40A as an upper panel and a dash panel lower 40B as a lower panel.

  The dash panel upper 40A is erected substantially vertically. The upper end of the dash panel lower 40B is connected to the lower end of the dash panel upper 40A, and further extends therefrom in a curved shape in a side view, bent from a vertical to an arc or an inclined shape, and the rear end becomes substantially horizontal. Connected to the front end of panel 38.

  The dash panel lower 40B functions as a so-called toe board on which the feet of the occupant sitting in the front seat are placed. From such a function, the floor panel of the passenger compartment 22 is constituted by the dash panel lower 40B and the floor panel 38.

  A floor tunnel 39 is formed at the center in the width direction of the dash panel lower 40B and the floor panel 38. When an internal combustion engine is mounted on the vehicle, an exhaust pipe is passed through the floor tunnel 39. On the other hand, in an electric vehicle on which an internal combustion engine is not mounted, an exhaust pipe is not required. Therefore, in the floor tunnel 39, for example, a battery ECU 42 for monitoring and controlling a battery is disposed.

  Referring to FIG. 3, floor tunnel 39 is reinforced by a reinforcing member called a tunnel reinforcement 44. The tunnel reinforcement 44 covers the floor tunnel 39 and extends in the width direction to the floor plate areas (the upper surfaces of the dash panel lower 40B and the floor panel 38) on both sides of the floor tunnel 39. As shown in FIG. 3, the floor-side extensions 36, 36 are arranged below the extension. In other words, the floor-side extensions 36, 36 are arranged below a portion of at least one of the dash panel lower 40B and the floor panel 38 constituting the floorboard, on which the reinforcing member (tunnel reinforcement 44) is provided on the upper surface. .

  Returning to FIG. 1, the battery unit 18 is arranged below the floor of the passenger compartment, that is, below the floor panel 38. The battery unit 18 includes a housing-like case 18B and a battery group 18C disposed therein. The battery group 18C includes a plurality of battery cells (unit cells), and the battery cells include, for example, a lithium ion secondary battery, a nickel hydride secondary battery, or an all solid state battery. For example, a plurality of these battery cells are connected in parallel to form a battery group, and a plurality of battery groups are connected in series to form a battery group 18C. In this example, the battery ECU 42 is also arranged inside the case 18B (below the floor tunnel).

  A high-voltage cable 30 is connected to the center of the battery unit 18 in the width direction below the front end portion (see FIG. 4). The high voltage cable 30 extends upward and forward from the front surface 18A of the battery unit 18 and is connected to the power conversion unit 26 of the high voltage system assembly 14. For example, as illustrated in FIG. 1, the high-voltage cable 30 is routed obliquely upward toward the front in a side view in which the left side is the front of the vehicle. The high-voltage cable 30 supplies the electric power from the battery group 18C to the rotating electric machine 10.

  A pair of floor-side extensions 36, 36 (floor-side extension members) are provided on the lower surface of the dash panel lower 40B, which is a part of the floor panel constituting the floor of the vehicle interior 22. The floor-side extensions 36, 36 are provided forward of the front surface 18A of the battery unit 18. For example, as shown in FIG. 4, the floor-side extension 36 is attached to the lower surface of the dash panel lower 40 </ b> B such that at least a facing surface 36 </ b> A facing the member-side extension 34 is located forward of the front surface 18 </ b> A of the battery unit 18. .

  In addition, in the example of FIG. 1, the floor-side extensions 36, 36 are provided on the lower surface of the dash panel lower 40B, but the present embodiment is not limited to such a form. In short, the floor-side extensions 36, 36 may be provided in front of the front surface 18A of the battery unit 18 on the lower surface of the floor of the passenger compartment 22. Specifically, the floor-side extensions 36, 36 may be provided on the lower surface of at least one of the dash panel lower 40B and the floor panel 38 constituting the floor of the passenger compartment 22, ahead of the front surface 18A of the battery unit 18. For example, the floor-side extensions 36, 36 may be provided on the lower surface of the floor panel 38, or the floor-side extensions 36, 36 may be provided on the lower surface of the dash panel lower 40B and the floor panel 38 so as to straddle both of them. .

  The floor-side extension 36 protrudes downward from the lower surface of the dash panel lower 40B such that the facing surface 36A and the facing surface 34A of the member-side extension 34 face in the vehicle front-rear direction. For example, the floor-side extensions 36, 36 are substantially box-shaped rigid members made of a metal material such as aluminum, and a closed cross-sectional structure is formed by covering the opening of the box with the dash panel lower 40B.

  Referring to FIG. 4, opposed surface 36 </ b> A of floor-side extension 36 is an inclined surface that is inclined downward toward the rear of the vehicle. As will be described later, this inclined surface functions as a sliding surface for dropping the suspension member 16 downward during a front collision. The angle of the inclination angle θ2 is determined by the amount of the suspension to be dropped.

  Further, as described above, the inclination angle θ2 of the facing surface 36A of the floor-side extension 36 with respect to the horizontal plane is configured to be larger than the inclination angle θ1 of the facing surface 34A of the member-side extension 34 with respect to the horizontal plane.

  Referring to FIG. 3, floor-side extensions 36, 36 are provided on the lower surface of dash panel lower 40B along the vehicle width direction so as to sandwich high-voltage cable 30 therebetween. For example, floor-side extensions 36, 36 are provided on the floor surface of the passenger compartment 22 at the boundary with the floor tunnel 39.

<Configuration of battery-side extension>
Referring to FIG. 4, diagonally below and behind the floor-side extensions 36, 36, a battery-side extension 50, 50 (battery-side extension member: in FIG. Is shown only one). The front end of the battery-side extension 50 is located forward of the front surface of the battery unit 18. The battery-side extension 50 has a slope 50A on the front side corresponding to the facing surface 34A of the member-side extension 34. When the member-side extension 34 advances rearward and slides the facing surface 36A of the floor-side extension 36 downward and rearward, and moves further backward, it opposes the member-side extension 34 and guides it further downward and rearward. Thus, it is possible to prevent the suspension member 16 and its associated components from colliding with the battery unit 18 and destroying the battery group 18C and the like. At this time, the battery-side extension 50 moves upward and rearward.

  The function of the battery-side extension 50 is very similar to that of the floor-side extension 36, and the battery-side extension 50 can be made of the same material and have the same shape. When the member-side extension 34 collides with the floor-side extension 36, the floor-side extension 36 moves upward, so that the battery-side extension 50 is also lifted upward. However, since the member-side extension 34 moves downward, the slope The angle of 50A may be almost the same as θ2. Note that, since the manner of deformation differs depending on the structure of the dash panel lower 40B and the like, it is appropriate to make the shape appropriately optimal. In addition, since the mounting portion of the battery-side extension 50 has room toward the rear, it is preferable that the rear portion is longer than the floor-side extension 36.

  Here, FIG. 8 shows a diagram in which the upper side of the battery unit 18 is opened. Thus, the battery ECU 42 is arranged on the front side of the case 18B, and the battery group 18C is arranged on the rear side. Further, battery-side extensions 50 are attached to the lower surfaces on both lower sides of the case 18B. In addition, the battery-side extension 50 may be one side instead of both sides on the lower side of the case 18B. No parts are arranged on the floor of the case 18B to which the battery-side extension 50 is attached, and this part is hollow. That is, components such as the battery ECU 42 are arranged at positions shifted in the vehicle width direction. Therefore, even if the member-side extension 34 collides with the battery-side extension 50 and the battery-side extension 50 moves upward, the influence on the components can be reduced. The case 18B is usually in the shape of a housing, and the upper side is closed.

<Structure of bracket>
Referring to FIG. 2, an elongated plate-like extended portion 16 </ b> D extending rearward is formed at a rear end of each of the suspension members 16 on both sides in the vehicle width direction. One end of a bracket 60 is fixed to the extension 16D.

  FIG. 9 shows a fastening state of the bracket 60. In this manner, the front end of the bracket 60 is bolted to the extension 16D of the suspension member 16, and the rear end is bolted to the lower surface of the body side member or the like. Therefore, the bracket 60 can also suppress the movement of the suspension member 16 toward the battery unit 18. Note that the rear end of the bracket 60 may be another member instead of the side member as long as it is a member having strength on the body side.

  Here, a platform such as a chassis may be shared between a vehicle having a high vehicle height and a vehicle having a low vehicle height. In such a case, a difference occurs in the height difference between the body side and the suspension member 16. The bracket 60 connects the suspension member 16 and the body side. By changing the shape of the bracket 60, adjustment for sharing a platform between a vehicle having a high vehicle height and a vehicle having a low vehicle height can be performed. I can do it.

<Behavior at the time of vehicle front collision>
The behavior of the vehicle front structure according to the present embodiment during a vehicle front collision will be described with reference to FIGS. As illustrated in FIG. 5, when the front of the vehicle collides with the obstacle 46 (barrier), the front end of the front side member 12 receives the obstacle and bends (buckles). With this bending deformation, the support member 32A that supports the suspension member 16 on the front side member 12 is retracted. Accordingly, the front end of the suspension member 16 is lifted upward, and the rear end is inclined downward.

  With the inclination of the rear end of the suspension member 16, the facing surface 34A of the member-side extension 34 is turned downward, and the facing surface 34A and the facing surface 36A of the floor-side extension 36 become parallel in a side view. While the parallel state is maintained, the suspension member 16 is further retracted, and the facing surface 34A of the member-side extension 34 collides with the facing surface 36A of the floor-side extension 36 as illustrated in FIG.

  In this collision, a load that sinks into the vehicle interior is input to the floor-side extension 36 that receives the collision of the member-side extension 34. As described above, the floor-side extension 36 is provided below the tunnel reinforcement 44 that is a reinforcing member. In other words, the floor-side extension 36 is lined with the tunnel reinforcement 44. Therefore, the load of the floor-side extension 36 into the passenger compartment 22 is received by the tunnel reinforcement 44, and the entry of the floor-side extension 36 into the passenger compartment 22 is suppressed.

  As the front collision further proceeds, the facing surface 34A of the member-side extension 34 and the facing surface 36A of the floor-side extension 36, which are inclined surfaces, guide the suspension member 16 downward. That is, the member-side extension 34 slides downward and rearward with respect to the floor-side extension 36, whereby the suspension member 16 falls downward and rearward. This makes it possible to prevent the suspension member 16 from entering the passenger compartment 22.

  When the suspension member 16 moves downward and rearward, the facing surface 34A of the member-side extension 34 collides with the slope 50A of the battery-side extension 50, as illustrated in FIG. The slope 50A of the battery-side extension 50 has a slope substantially matching the facing surface 34A of the member-side extension 34 that has advanced, and the member-side extension 34 is guided downward and rearward by the slope 50A, and the suspension member 16 is further moved. Proceed downward and backward. At this time, the extension 16D of the suspension member 16 and the like are greatly deformed, but the suspension member 16 moves further downward and rearward, so that collision between the suspension member 16 and the battery unit 18 can be avoided.

  Thus, by providing the battery-side extension 50 on the lower surface of the front part of the case 18B of the battery unit 18 below and behind the floor-side extension 36, the member-side extension 34 is connected to the floor-side extension 36 and the battery-side extension 50. The suspension members 16 are sequentially collided, and the suspension member 16 is guided downward and rearward, so that intrusion into the vehicle compartment and collision with the battery unit 18 can be avoided.

<Another aspect of the present embodiment>
Here, in the above embodiment, both the floor-side extension 36 and the battery-side extension 50 are provided, but the floor-side extension 36 may be omitted.

  That is, as shown in FIG. 10, the slope 50A of the battery-side extension 50 is positioned so as to face the facing surface 34A of the member-side extension 34. Thus, when the suspension member 16 moves rearward due to a front collision, the facing surface 34A of the member-side extension 34 is guided downward and rearward by the slope 50A of the battery-side extension 50, and the suspension member 16 is moved into the vehicle interior. It is possible to avoid entry and collision with the battery unit 18.

  Reference Signs List 10 rotating electric machine, 12 front side member, 14 high voltage system assembly, 16 suspension member, 16A suspension member upper rear end, 16C suspension member upper rear end, 18 battery unit, 18A battery unit front surface, 20 engine compartment, 22 vehicle compartment , 24 charger, 26 power conversion unit, 28 compartment cross, 30 high-voltage cable, 32A, 32B support member, 34 member-side extension (expansion member), 34A opposing surface of member-side extension, 36 floor-side extension (expansion member) , 36A floor extension side facing surface, 37 floor side protrusion, 38 floor panel, 39 floor tunnel, 40A dash panel upper, 40B dash panel , 42 battery ECU, 44 tunnel reinforcement (reinforcement member), 46 obstacles, 50 battery side extension (extension member) 60 bracket.

Claims (5)

A battery unit provided under the floor of the passenger compartment;
A suspension member provided in front of the battery unit, in front of the cabin,
A vehicle front structure comprising:
On the lower surface of at least one of the dash panel lower and the floor panel constituting the floor, a floor-side expansion member having a front end slope whose lower side is located rearward is projected forward of the battery unit front surface,
On the front side of the battery unit, a battery-side expansion member having a front end inclined surface whose lower side is located rearward and protruding below the floor-side expansion member,
A member-side expansion member having a rear end slope whose lower side is located on the rear side is protruded at a position facing the floor-side expansion member at the rear end edge of the suspension member in the vehicle front-rear direction.
Vehicle front structure. The vehicle front structure according to claim 1, wherein
The lower end of the floor-side expansion member is located below the upper end of the battery-side expansion member,
Vehicle front structure. The vehicle front structure according to claim 1 or 2,
The facing surface of the member-side expanding member is inclined more horizontally than the facing surface of the floor-side expanding member.
Vehicle front structure. A battery unit provided under the floor of the passenger compartment;
A suspension member provided in front of the battery unit ahead of the cabin,
A vehicle front structure comprising:
At the front of the battery unit, a battery-side expansion member having a front end slope whose lower side is located rearward is protruded,
A member-side expansion member having a rear end slope whose lower side is located on the rear side protrudes from a rear end edge of the suspension member at a position facing the battery-side expansion member in the vehicle front-rear direction.
Vehicle front structure. The vehicle front structure according to any one of claims 1 to 4,
The battery unit includes a battery group and a case for housing the battery group,
The battery-side expansion member is provided on a lower surface of a front portion of the case, and a peripheral portion of the battery-side expansion member in the case is in a hollow state.
Vehicle front structure.

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