JP6907996B2 - Vehicle body structure - Google Patents

Description

The present invention relates to a vehicle body structure such that, for example, a frame member extending in the vehicle front-rear direction along a floor tunnel is provided in the vehicle interior of the vehicle.

It is known that in a vehicle such as an automobile, when an occupant operates the steering wheel, a load that twists the entire vehicle body acts on the vehicle body via the suspension. Then, such a load not only gives the occupant a sense of discomfort that the entire vehicle body is twisted, but also causes the occupant to feel that the responsiveness of the vehicle behavior to the steering operation is low.

For this reason, in general, a vehicle such as an automobile improves the responsiveness to a steering operation and secures steering stability by improving the vehicle body rigidity against a load acting on the vehicle body via a suspension.
Further, since a vehicle such as a sports car is often required to have higher steering stability than a general vehicle, a technique for further improving the vehicle body rigidity has been proposed.

For example, in Patent Document 1, a pair of left and right first tunnels extending in the vehicle front-rear direction while being disposed on the upper surface of a floor tunnel (tunnel portion) extending in the vehicle interior in the vehicle front-rear direction at intervals in the vehicle width direction. It includes a frame and a front frame having a rear portion branched in three directions, and a first branch portion which is one of the branched rear portions of the front frame is connected to a floor panel and a second branch portion which is one of the branched rear portions. Is connected to the first tunnel frame via a dash panel, and a vehicle body structure in which a third branch portion, which is one of the branched rear portions, is connected to a hinge pillar is disclosed. As a result, Patent Document 1 states that the rigidity of the vehicle body can be improved.

By the way, in the passenger compartment, the more the occupant's seating position is located outside in the vehicle width direction, the more the occupant's behavior when the vehicle turns to the right and the behavior of the occupant when the vehicle turns to the left. The difference tends to be large. Further, in the case of a vehicle such as a sports car, it is preferable that the seating position of the occupant is close to the position of the center of gravity of the vehicle body in which the occupant can easily feel the behavior of the vehicle. Therefore, there is a need to arrange the driver's seat on which the occupant sits as far as possible in the vehicle width direction.

However, in the case of a vehicle having tunnel frames at both ends in the vehicle width direction on the upper surface of the floor tunnel as in Patent Document 1, if the seat surface portion of the driver's seat is arranged at a desired position, that is, inside the vehicle width direction, The occupant's arm may come into contact with the tunnel frame, which may hinder the occupant's steering operation.

JP-A-2009-101815

In view of the above problems, it is an object of the present invention to provide a vehicle body structure capable of improving the vehicle body rigidity and arranging the driver's seat at a desired position.

The present invention is a vehicle body structure including a pair of left and right suspension support members that support the front suspension of the vehicle and a pair of left and right tunnel frames that extend the interior of the vehicle in the front-rear direction of the vehicle along a floor tunnel. In a side view, the front end is connected to the suspension support member, and a pair of left and right body frame frames extending upward from the floor tunnel are provided, and the driver's seat is located at the most rearward sliding position of the vehicle. In the driver's seat, the position of substantially the center of the vehicle front-rear direction is defined as the seat center, and the position of the upper surface of the floor tunnel at the position substantially the same as the center of the seat in the vehicle front-rear direction is set as a predetermined position. In the above, the shape is formed so as to extend from the rear end of the floor tunnel toward the front of the vehicle along the upper surface of the floor tunnel and then extend toward the rear end of the vehicle body skeleton frame at the predetermined position. At the same time, it is characterized in that it is connected to the rear end of the vehicle body frame.

According to the present invention, the rigidity of the vehicle body can be improved and the driver's seat can be arranged at a desired position.
Specifically, since the vehicle body frame and the tunnel frame are connected, the vehicle body structure of the vehicle can improve the support rigidity of the front suspension and the body rigidity.

Further, since the tunnel frame extends from a predetermined position toward the vehicle body skeleton frame, the vehicle body structure of the vehicle is a predetermined position in the tunnel frame as compared with the case where the position behind the vehicle is set to the predetermined position from the center of the seat. It is possible to prevent the occupant's arm, especially the area around the elbow, from coming into contact with the front part of the vehicle.

In addition, compared to the case where the position in front of the vehicle from the center of the seat is set to the predetermined position, the vehicle body structure of the vehicle is the portion in front of the vehicle from the predetermined position in the tunnel frame and the part behind the vehicle from the predetermined position in the tunnel frame. The relative angle with the part can be reduced.

As a result, the vehicle body structure can prevent the occupant's arm from coming into contact with the tunnel frame by suppressing a decrease in the rigidity of the tunnel frame and a decrease in the load transmission efficiency of the tunnel frame in the vicinity of a predetermined position. Therefore, in the vehicle body structure of the vehicle, the driver's seat on which the occupant sits can be arranged inside the vehicle interior in the vehicle width direction.
Therefore, the vehicle body structure can improve the vehicle body rigidity and the driver's seat can be arranged at a desired position.

As an aspect of the present invention, a reinforcing member may be provided in front of the vehicle from the predetermined position to connect and reinforce the left and right tunnel frames separated from each other in the vehicle width direction.
According to the present invention, the vehicle body structure of the vehicle can be reinforced by a reinforcing member at a portion in front of the vehicle from a predetermined position on the tunnel frame. That is, the vehicle body structure of the vehicle can improve the rigidity of the left and right tunnel frames in front of the vehicle from the predetermined position.

Further, for example, when a load is input to the front ends of the left and right tunnel frames at different timings, the vehicle body structure can suppress the left and right tunnel frames from being displaced in different directions by the reinforcing member.
At this time, the vehicle body structure can transmit the load acting on one tunnel frame to the other tunnel frame via the reinforcing member.

As a result, the vehicle body structure can suppress the torsional deformation of the pair of left and right tunnel frames, and can efficiently transmit the loads input at different timings in the front-rear direction of the vehicle.
Therefore, the vehicle body structure can further improve the load transmission efficiency and further improve the vehicle body rigidity by the reinforcing member that connects and reinforces the left and right tunnel frames separated in the vehicle width direction in front of the vehicle from the predetermined position. can do.

Further, as an aspect of the present invention, the tunnel frame may be composed of an internally hollow extrusion member formed by extrusion molding.
According to the present invention, the body structure of a vehicle can suppress an increase in the number of parts as compared with a tunnel frame in which a portion in front of the vehicle and a portion behind the vehicle from a predetermined position are separately formed. At the same time, it is possible to suppress a decrease in load transmission efficiency in the vicinity of a predetermined position.
Therefore, in the vehicle body structure, the left and right tunnel frames made of the extruded members can further improve the vehicle body rigidity without further impairing the load transmission efficiency.

Further, as an aspect of the present invention, the vehicle body frame is formed in a shape extending along a virtual straight line connecting the suspension support member and the upper surface of the floor tunnel located in front of the vehicle from the predetermined position in a plan view. The front end of the tunnel frame is connected to the rear end of the vehicle body frame in a plan view, and the front end of the frame extends along the virtual straight line, and the floor tunnel is formed from the front end of the frame in a plan view. It may extend to the rear of the vehicle along the top surface of the tunnel and may be formed with the rear of the frame adjacent to or connected to the other tunnel frame.

According to the present invention, the vehicle body structure of the vehicle can arrange the driver's seat at a more desired position without impairing the load transmission efficiency of the vehicle body.
Specifically, for example, in a plan view, when the frame front part of the tunnel frame is formed along a virtual straight line connecting the suspension support member and a predetermined position, the frame front part is in the vehicle width direction from a position close to the occupant. It will be extended to the outside and toward the front of the vehicle. Therefore, the legs of the occupant seated in the driver's seat, particularly around the knees, easily come into contact with the front part of the frame.

On the other hand, in a plan view, the vehicle body structure is made by forming the front part of the frame along a virtual straight line connecting the upper surface of the floor tunnel located in front of the vehicle from the predetermined position and the suspension support member. The legs of the occupant seated in the driver's seat, especially around the knees, can be made difficult to contact the front part of the frame. Therefore, in the vehicle body structure of the vehicle, the driver's seat on which the occupant sits can be arranged inside the vehicle interior in the vehicle width direction.

Further, since the front part of the frame of the tunnel frame extends substantially linearly so as to be continuous from the car body skeleton frame in the plan view, the car body structure of the vehicle is the frame front part of the tunnel frame and the car body skeleton in the plan view. The relative angle with the frame can be made as small as possible. Therefore, the vehicle body structure of the vehicle can suppress a decrease in load transmission efficiency between the vehicle body skeleton frame and the tunnel frame.

Therefore, in the vehicle body structure, the load transmission of the vehicle body is performed by forming the front part of the tunnel frame along a virtual straight line connecting the upper surface of the floor tunnel located in front of the vehicle from the predetermined position and the suspension support member. The driver's seat can be arranged in a more desired position without compromising efficiency.

Further, as an aspect of the present invention, a dash panel connected to the front end of the floor tunnel, a cowl box connected to the upper end of the dash panel and extending in the vehicle width direction are provided, and the rear end of the vehicle body skeleton frame is provided. , The front end of the tunnel frame may be connected via a connecting member in the vicinity of the lower end of the cowl box, and the connecting member may be formed in a shape forming a part of the cowl box.

According to the present invention, the vehicle body structure of the vehicle can further suppress a decrease in load transmission efficiency between the vehicle body skeleton frame and the tunnel frame, and can improve the vehicle body rigidity of the vehicle.

Specifically, since the rear end of the vehicle body skeleton frame is located above the vehicle from the front end and the front end of the tunnel frame is located above the vehicle from the rear end, the vehicle body skeleton frame and the tunnel frame are substantially opposite in side view. They are connected in a V-shaped bent state.

Therefore, by connecting the vehicle body skeleton frame and the tunnel frame via a connecting member forming a part of the cowl box, the vehicle body structure of the vehicle increases the connection rigidity at the connecting portion between the vehicle body skeleton frame and the tunnel frame. be able to.
Therefore, the vehicle body structure of the vehicle can further suppress the decrease in load transmission efficiency between the vehicle body skeleton frame and the tunnel frame, and can improve the vehicle body rigidity of the vehicle.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a vehicle body structure capable of improving the vehicle body rigidity and arranging the driver's seat at a desired position.

A side view showing the front vehicle body and the passenger compartment as seen from the left side of the vehicle. A plan view showing a front vehicle body and a passenger compartment in a plan view. Bottom view showing the front vehicle body and the passenger compartment in bottom view. A cross-sectional view taken along the line AA in FIG. A cross-sectional view showing a front frame connecting member in a vertical cross section along the vehicle front-rear direction. The external perspective view which shows the appearance of the floor tunnel in the front view of the vehicle. FIG. 2 is a cross-sectional view taken along the line BB in FIG. FIG. 2 is a cross-sectional view taken along the line CC in FIG. The external perspective view which shows the appearance of the tunnel upper frame in the front view of the vehicle. FIG. 2 is a cross-sectional view taken along the line DD in FIG. A cross-sectional view showing a reinforcing member in a vertical cross section along the vehicle front-rear direction. Sectional drawing which shows another reinforcing member.

An embodiment of the present invention will be described below with reference to the drawings.
The vehicle body structure of the vehicle 1 of the present embodiment is a so-called space frame structure in which a plurality of extrusion-molded aluminum alloy frames are connected to form a vehicle body skeleton. Such a vehicle body structure of the vehicle 1 will be described with reference to FIGS. 1 to 11.

Note that FIG. 1 shows a side view of the front vehicle body 3 and the passenger compartment 7 as viewed from the left side of the vehicle, and FIG. 2 shows a plan view of the front vehicle body 3 and the passenger compartment 7 in a plan view. FIG. Shows a bottom view of the front vehicle body 3 and the passenger compartment 7 in a bottom view, and FIG. 4 shows a cross-sectional view taken along the line AA in FIG.

Further, FIG. 5 shows a cross-sectional view of the front frame connecting member 94 in a vertical cross section along the vehicle front-rear direction, FIG. 6 shows an external perspective view of the floor tunnel 82 when viewed from the front of the vehicle, and FIG. 7 is in FIG. BB is a cross-sectional view taken along the line BB, FIG. 8 is a cross-sectional view taken along the line CC in FIG. 2, FIG. 9 is an external perspective view of the tunnel upper frame 89 when viewed from the front of the vehicle, and FIG. A cross-sectional view taken along the line DD in FIG. 2 is shown, and FIG. 11 shows a cross-sectional view of the reinforcing member 96 in a vertical cross section along the vehicle front-rear direction.

Further, in order to clarify the illustration, in FIGS. 1 and 2, the pair of left and right passenger compartment upper side frames, the front header, the roof reinforcement, and the rear header are omitted, and FIGS. In FIG. 8, the floor panel 86 is not shown.
Further, in the figure, the arrows Fr and Rr indicate the front-back direction, the arrow Fr indicates the front, the arrow Rr indicates the rear, the arrows Rh and Lh indicate the width direction, and the arrow Rh indicates the right direction. The arrow Lh indicates to the left.

As shown in FIG. 1, the vehicle body structure of the vehicle 1 in the present embodiment includes a front vehicle body 3 that supports the front suspension 2 of the vehicle 1 and a rear vehicle body 5 that supports the rear suspension 4 of the vehicle 1 (see FIG. 3). And the passenger compartment 7 on which the occupant gets in are connected to each other.
In the present embodiment, the front vehicle body 3 and the vehicle interior portion 7 of the vehicle 1 will be described in detail, and the description of the rear vehicle body 5 will be omitted.

First, as shown in FIG. 1, the front suspension 2 has a double wishbone suspension structure, and has a knuckle (not shown) that rotatably supports the front wheels of the vehicle 1 and a flat surface having the outside in the vehicle width direction as the top. The lower arm 21 has a substantially triangular shape, the upper arm 22 has a substantially triangular shape in a plan view with the outer side in the vehicle width direction as the top, and the suspension damper 23 has a lower end connected to the lower arm 21.

As shown in FIGS. 1 to 3, the front vehicle body 3 that supports such a front suspension 2 is a pair of left and right front suspensions that support the left and right front suspensions 2 that are arranged at a desired position in front of the vehicle interior portion 7 as shown in FIGS. 1 to 3. Front suspension support member 31, a pair of left and right upper side frames 32 connecting the front suspension support member 31 and the passenger compartment 7, a pair of left and right first lower side frames 33, and a pair of left and right second lower side frames. 34, a pair of left and right upper center frames 35, and a pair of left and right lower center frames 36 are provided.

On the other hand, as shown in FIGS. 1 to 3, the vehicle interior portion 7 of the vehicle 1 has a pair of left and right hinge pillars 71 extending in the vertical direction of the vehicle at positions separated by a predetermined interval in the vehicle width direction, and a pair of left and right center pillars 72. A pair of left and right side sills 73 extending in the front-rear direction of the vehicle at positions separated by a predetermined distance in the vehicle width direction, a pair of left and right passenger compartment upper side frames (not shown), and left and right passenger compartment upper side frames. A front header (not shown), a roof reinforcement (not shown), and a rear header (not shown) connected in the width direction, a dash panel 78 forming the front wall of the passenger compartment 7, a cowl box 79, and a passenger compartment. A rear wall portion 80 forming the rear wall of the portion 7 and a first cross member 81 in the vehicle interior are provided.

Further, as shown in FIGS. 2 and 3, the vehicle interior portion 7 connects the floor tunnel 82 extending in the front-rear direction of the vehicle and the left and right side sills 73 with the floor tunnel 82 interposed therebetween, inside the passenger compartment portion 7. A pair of passenger compartment second cross members 83, a pair of left and right passenger compartment third cross members 84, a pair of left and right passenger compartment fourth cross members 85, a floor panel 86 forming the floor surface of the passenger compartment 7, and an occupant It includes a driver's seat 87 to be seated, a tunnel side frame 88 extending in the front-rear direction of the vehicle along the floor tunnel 82, and a tunnel upper frame 89.

Subsequently, each component of the front vehicle body 3 and the vehicle interior portion 7 in the vehicle 1 described above will be described in more detail.
First, as described above, the front vehicle body 3 has a pair of left and right front suspension support members 31, a pair of left and right upper side frames 32, a pair of left and right first lower side frames 33, and a pair of left and right second lower sides. A frame 34, a pair of left and right upper center frames 35, and a pair of left and right lower center frames 36 are provided.

The pair of left and right front suspension support members 31 are aluminum die-cast members having a function as a vehicle body skeleton member constituting the front vehicle body 3 in the vehicle 1 and a function of swingably supporting the front suspension 2. ..

As shown in FIG. 1, the front suspension support member 31 is spaced above the vehicle by a predetermined distance from the lower arm support portion 311 to which the inside of the lower arm 21 in the vehicle width direction is swingably connected to the lower arm support portion 311. The front connecting portion 313 and the rear connecting portion 312 connecting the upper arm supporting portion 312, the lower arm supporting portion 311 and the upper arm supporting portion 312 in which the inside of the upper arm 22 in the vehicle width direction is swingably connected. The portion 314 and the portion 314 are integrally formed in a substantially square-shaped side view.

As shown in FIG. 1, the upper end of the suspension damper 23 is swingable on the upper arm support portion 312. More specifically, the upper arm support portion 312 swings the upper end of the suspension damper 23 between the front end portion and the rear end portion of the upper arm 22 and at a position above the upper arm 22 of the vehicle. Supports.

As shown in FIGS. 2 and 3, the left and right front suspension support members 31 are a front suspension cloth 37 whose lower arm support portion 311 is made of die-cast aluminum, and a front portion which is an extruded aluminum alloy extruded member. The upper arm support portion 312 is connected via the first cross member 38, and the upper arm support portion 312 is connected via the front second cross member 39, which is an extruded member made of an extruded aluminum alloy.

Further, as shown in FIGS. 1 and 2, the pair of left and right upper side frames 32 connect the upper arm support portion 312 of the front suspension support member 31 and the hinge pillar 71 of the vehicle interior portion 7.
Specifically, the upper side frame 32 is an extruded member made of an extruded aluminum alloy, and is formed in a substantially tubular body having a substantially rectangular closed cross section extended in a predetermined direction.

As shown in FIGS. 1 and 2, the upper side frame 32 is joined to the upper surface of the upper arm support portion 312 with one end in a predetermined direction as the front end, and is outside in the vehicle width direction with respect to the front end and above the vehicle. The positioned rear end is joined to the front surface of the aluminum alloy connecting member 11 provided at the upper end of the hinge pillar 71 to connect the upper arm support portion 312 of the front suspension support member 31 and the upper end of the hinge pillar 71. There is.

As shown in FIG. 1, a pair of left and right reinforcing frames 40 connected to the lower part of the hinge pillar 71 are joined to the lower surface of the upper side frame 32 substantially at the center in the front-rear direction of the vehicle.
The pair of left and right reinforcing frames 40 are extruded members made of an aluminum alloy that have been extruded, and are formed in a substantially tubular body that extends in a predetermined direction while gently curving a substantially rectangular closed cross section.

The upper end of the reinforcing frame 40 is joined to the lower surface of the upper side frame 32 substantially in the center in the front-rear direction of the vehicle, and the lower end is joined to the front surface of the upper portion 90 of the collision load absorbing box provided below the hinge pillar 71, which will be described later. , The upper side frame 32 and the lower part of the hinge pillar 71 are connected.

Further, as shown in FIGS. 1 and 2, the pair of left and right first lower side frames 33 are formed by the upper arm support portion 312 of the front suspension support member 31 and the passenger compartment portion 7 below the upper side frame 32. It is connected to the hinge pillar 71.
Specifically, the first lower side frame 33 is an extruded member made of an extruded aluminum alloy, and is formed in a substantially tubular body having a substantially rectangular closed cross section extended in a predetermined direction.

As shown in FIGS. 1 and 2, the first lower side frame 33 is joined to the rear surface of the upper arm support portion 312 with one end in a predetermined direction as the front end, and is outside in the vehicle width direction with respect to the front end and is a vehicle. The rear end located below is joined to the inner side surface in the vehicle width direction of the upper portion 90 of the collision load absorption box via the torque box member 93 described later, so that the upper arm support portion 312 of the front suspension support member 31 and the upper arm support portion 312 are joined. It is connected to the lower part of the hinge pillar 71.

Further, as shown in FIGS. 1 and 2, the pair of left and right second lower side frames 34 are the lower arm support portion 311 of the front suspension support member 31 and the vehicle interior portion below the first lower side frame 33. The side sill 73 of 7 is connected.
Specifically, the second lower side frame 34 is an extruded member made of an extruded aluminum alloy, and is formed in a substantially tubular body having a substantially rectangular closed cross section extended in a predetermined direction.

As shown in FIGS. 1 to 3, the second lower side frame 34 has one end in a predetermined direction as the front end, and the front end is joined to the rear surface of the lower arm support portion 311 and is located outside in the vehicle width direction with respect to the front end. By joining the rear end to the torque box member 93 connected to the side surface of the side sill 73, which will be described later, the lower arm support portion 311 of the front suspension support member 31 and the front end of the side sill 73 of the vehicle interior portion 7 are connected. ing.

Further, as shown in FIGS. 1 and 2, the pair of left and right upper center frames 35 have the upper arm support portion 312 of the front suspension support member 31 and the vehicle between the upper side frame 32 and the first lower side frame 33. It is connected to the dash panel 78 of the room part 7.
Specifically, the upper center frame 35 is an extruded member made of an extruded aluminum alloy, and has a substantially tubular shape in which a closed cross section having a partition wall portion that separates the internal space in the vertical direction of the vehicle is extended in a predetermined direction. It is formed on the body.

As shown in FIGS. 1 and 2, the upper center frame 35 is in front of the vehicle 1 so that one end in a predetermined direction is the front end and the rear end is located inside the vehicle width direction and above the vehicle with respect to the front end. It is arranged on the vehicle body 3.

Here, as shown in FIG. 2, in a plan view, the position of the upper surface of the floor tunnel 82 (the upper surface portion 822c described later) at a position substantially the same as the steering wheel S arranged in the passenger compartment 7 in the vehicle front-rear direction. In other words, the position of the upper surface of the floor tunnel 82 (the upper surface portion 822c described later) at a position substantially the same as the vehicle interior third cross member 84 arranged below the vehicle of the steering wheel S in the vehicle front-rear direction is set to the first position. As the predetermined position P1, the virtual straight line connecting the rear surface of the upper arm support portion 312 and the first predetermined position P1 is defined as the plan view virtual straight line L1.

On the other hand, as shown in FIG. 2, in the upper center frame 35, the rear end of the vehicle 1 is located near the position where the virtual straight line L1 in the plan view and the dash panel 78 intersect in the plan view. It is arranged on the front vehicle body 3.

Further, as shown in FIG. 1, the rear end of the upper center frame 35 is arranged so as to be located near the upper end of the dash panel 78 in the vehicle interior portion 7 in the side view.
As shown in FIGS. 1 and 2, the upper center frame 35 arranged in this way has a front end joined to the rear surface of the upper arm support portion 312 and a rear end integrally provided on the dash panel 78. By being joined to the connecting member 94, the upper arm support portion 312 of the front suspension support member 31 and the dash panel 78 are connected. The front frame connecting member 94 will be described in detail later.

Further, as shown in FIGS. 1 to 3, the pair of left and right lower center frames 36 connect the lower arm support portion 311 of the front suspension support member 31 and the tunnel side frame 88 of the vehicle interior portion 7.
Specifically, the lower center frame 36 is an extruded member made of an extruded aluminum alloy, and is formed in a substantially tubular body having a substantially rectangular closed cross section extended in a predetermined direction.

As shown in FIGS. 1 and 3, the lower center frame 36 is attached to the front vehicle body 3 of the vehicle 1 so that one end in a predetermined direction is the front end and the rear end is located inside in the vehicle width direction with respect to the front end. Have been placed.
More specifically, the lower center frame 36 is arranged along a virtual straight line (not shown) connecting the lower arm support portion 311 and the substantially center of the floor tunnel 82 of the vehicle interior portion 7, which will be described later, in the front-rear direction of the vehicle.

As shown in FIGS. 1 and 3, the lower center frame 36 is an aluminum die whose front end is fastened and fixed to the front suspension cross 37 near the lower arm support portion 311 and whose rear end is connected to the front end of the tunnel side frame 88. By fastening and fixing to the cast connecting member 12, the lower arm support portion 311 of the front suspension support member 31 and the tunnel side frame 88 are connected.

On the other hand, as described above, the passenger compartment 7 includes a pair of left and right hinge pillars 71, a pair of left and right center pillars 72, a pair of left and right side sills 73, a pair of left and right passenger compartment upper side frames, and a front header. The roof reinforcement, the rear header, the dash panel 78, the cowl box 79, the rear wall 80, the passenger compartment first cross member 81, the floor tunnel 82, and the pair of left and right passenger compartment second cross members 83. A pair of left and right passenger compartment third cross members 84, a pair of left and right passenger compartment fourth cross members 85, a floor panel 86, a driver's seat 87, a tunnel side frame 88, and a tunnel upper frame 89 are provided. ..

As shown in FIG. 2, the pair of left and right hinge pillars 71 are arranged at positions outside the vehicle width direction and rearward of the vehicle with respect to the front suspension support member 31 in a plan view. The hinge pillar 71 is an extruded member made of an extruded aluminum alloy, and is formed in a substantially tubular body having a substantially rectangular closed cross section extended in a predetermined direction.

Then, as shown in FIG. 1, the hinge pillar 71 is arranged in the vehicle interior portion 7 of the vehicle 1 so that one end in a predetermined direction is the lower end and the upper end is located in front of the vehicle with respect to the lower end.
As shown in FIGS. 1 and 2, the hinge pillar 71 is joined to the upper end by an aluminum alloy connecting member 11 to which the rear end of the upper side frame 32 and the front end of the upper side frame of the passenger compartment are joined. A substantially box-shaped upper part 90 of a collision load absorbing box that absorbs a collision load from the front of the vehicle is joined to the lower front surface.

As shown in FIG. 3, the upper part 90 of the collision load absorbing box is a cross-sectional shape in a vertical cross section along the vehicle width direction with the lower part 91 of the collision load absorbing box formed by extending the side sill 73 described later to the front of the vehicle. Is formed in a substantially box shape having a closed cross section.

Further, as shown in FIG. 1, the pair of left and right center pillars 72 are arranged at positions separated from the hinge pillar 71 at a predetermined distance behind the vehicle, and at the opening of the side door (not shown) of the vehicle 1. It forms the trailing edge. The lower end of the center pillar 72 is joined to the rear end of the side sill 73, and the upper end is connected to the upper side frame of the passenger compartment at a position slightly rear of the vehicle from the rear end of the side sill 73.

Specifically, the center pillar 72 is provided from the lower part of the pillar extending upward from the lower end joined to the rear end of the side sill 73 and slightly toward the rear of the vehicle, and the first cross member 81 in the passenger compartment, which will be described later. Also consists of a pillar upper part that extends slightly above the vehicle from a position above the vehicle and is connected to a lateral frame above the passenger compartment.

Although detailed illustration is omitted, the center pillar 72 is formed by joining an aluminum alloy pillar outer panel and an aluminum alloy pillar inner panel 72a (see FIG. 1) in the vehicle width direction and along the vehicle front-rear direction. The cross-sectional shape in the horizontal cross section is formed into an open cross-sectional shape in which the rear of the vehicle is open.

Further, as shown in FIGS. 1 to 3, the pair of left and right side sills 73 connect the lower end of the hinge pillar 71 and the lower end of the center pillar 72 in the front-rear direction of the vehicle.
Specifically, the side sill 73 is an extruded member made of an extruded aluminum alloy, and is formed in a substantially tubular body having a closed cross section divided into a plurality of sections extending in the front-rear direction of the vehicle.

As shown in FIG. 1, the side sill 73 has the lower end of the hinge pillar 71 bonded to the upper surface near the front end and the lower end of the center pillar 72 to the rear end.
At the front end of the side sill 73, a collision load absorption box lower portion 91 that further extends the side sill 73 to the front of the vehicle for a predetermined length and closes the front end opening to absorb the collision load from the front of the vehicle is configured. There is.

Further, although detailed illustration of the pair of left and right passenger compartment upper side frames is omitted, the upper end of the hinge pillar 71 and the rear pillar of the rear vehicle body 5 (not shown) are connected through the upper portion of the passenger compartment portion 7. ing.
Specifically, the passenger compartment upper side frame is an extruded aluminum alloy extruded member, and has a portion corresponding to a front pillar in the vehicle 1 and a portion corresponding to a roof side rail in the vehicle 1. It is formed in an integrally formed shape.

Further, although detailed illustration of the front header is omitted, the front ends of the portion corresponding to the roof side rail in the upper side frame of the passenger compartment are connected to each other in the vehicle width direction. This front header has a cross-sectional shape in a vertical cross section along the front-rear direction of the vehicle, and is configured to form a closed cross section by joining an upper panel having a substantially hat-shaped cross section and a lower panel having a substantially hat-shaped cross section in the vertical direction of the vehicle. ..

Further, although detailed illustration is omitted, the roof reinforcement connects substantially the center in the front-rear direction of the vehicle in the vehicle width direction at a portion corresponding to the roof side rail in the upper side frame of the passenger compartment. In this roof reinforcement, an aluminum alloy upper panel and an aluminum alloy lower panel are joined in the vertical direction of the vehicle, and the cross-sectional shape in the vertical cross section along the front-rear direction of the vehicle forms a closed cross section having a substantially rectangular cross section. It is configured as.

Further, although detailed illustration is omitted, the rear header connects the vicinity of the boundary between the rear pillar and the upper side frame of the passenger compartment in the vehicle width direction. This rear header is configured by joining an aluminum alloy upper panel and an aluminum alloy lower panel in the vertical direction of the vehicle so that the cross-sectional shape in the vertical cross section along the front-rear direction of the vehicle forms a closed cross section having a substantially rhombic cross section. ing.

Further, as shown in FIG. 4, the dash panel 78 is an aluminum alloy partition member forming a front wall that separates the space of the vehicle interior portion 7 from the space in front of the vehicle interior portion 7, and is a hinge pillar 71. It is formed in a shape that connects the range in the vehicle vertical direction from the upper end of the vehicle to the lower end of the side sill 73 in the vehicle width direction.
Further, the dash panel 78 is formed in a front view substantially gate shape in which the lower end of the vehicle is open so that the lower end near the center in the vehicle width direction is continuous with the floor tunnel 82 described later.

As shown in FIGS. 2 to 4, the front surface of the dash panel 78 collides with a pair of left and right gusset members 92 having a closed cross section between the upper portion 90 of the collision load absorbing box and the front surface of the dash panel 78 adjacent thereto. A pair of left and right torque box members 93 having a closed cross section are joined to the lower portion 91 of the load absorbing box and the front surface of the dash panel 78 adjacent thereto.

Although not shown in detail, the gusset member 92 is formed with an opening through which the first lower side frame 33 joined to the side surface of the upper portion 90 of the collision load absorbing box penetrates. The opening of the gusset member 92 is joined to the first lower side frame 33 inserted through the opening.
As shown in FIG. 4, the rear end of the second lower side frame 34 is joined to the front surface of the torque box member 93.

Further, as shown in FIGS. 2 and 4, the cowl box 79 is joined to the upper end of the dash panel 78, and the left and right connecting members 11 are connected in the vehicle width direction.
Specifically, as shown in FIGS. 2 and 4, the cowl box 79 is an aluminum alloy cowl inner that is joined to the dash panel 78 at the lower end and supports the lower end of the front window glass (not shown). The panel 791 and the aluminum alloy cowl outer panel 792 joined to the front end of the cowl inner panel 791 are formed in a substantially box shape with an opening above the vehicle.

As shown in FIGS. 2 and 4, the cowl box 79 is cut out at a position substantially the same as the rear end of the left and right upper center frames 35 in the vehicle width direction with a size corresponding to the front frame connecting member 94. A notch is provided on the cowl outer panel 792. A pair of left and right front frame connecting members 94 are joined to the notched portion of the cowl box 79.

The pair of left and right front frame connecting members 94 are made of die-cast aluminum and are joined to the upper part of the dash panel 78 and the cowl box 79, together with the dash panel 78 and the cowl box 79, as shown in FIG. It is formed in a shape that forms a part of the front wall of the passenger compartment 7.

As shown in FIG. 5, the front frame connecting member 94 has a lower portion 94a formed in a cross-sectional shape along the dash panel 78 and a front surface of the cowl outer panel 792 in a vertical cross section along the vehicle front-rear direction. The upper part 94b extending upward from the upper end of the lower part 94a, the bottom forming portion 94c extending rearward from the lower end of the upper part 94b so as to form the bottom of the cowl box 79, and the upper center frame 35. The front fitting portion 94d extending from the front surface of the lower portion 94a to the front of the vehicle so that the rear end can be fitted, and the front end of the tunnel upper frame 89, which will be described later, extend from the rear surface of the lower portion 94a to the rear of the vehicle so that they can be fitted. It is integrally formed with the rear fitting portion 94e.

The front fitting portion 94d of the front frame connecting member 94 and the rear fitting portion 94e are formed so as to face each other in the front-rear direction of the vehicle.
Further, an aluminum die-cast connecting member 13 that connects the front frame connecting member 94 and the upper surface of the rear end of the upper center frame 35 is joined to the front surface of the upper portion 94b of the front frame connecting member 94.

Further, as shown in FIG. 4, the rear wall portion 80 is an aluminum alloy that connects the left and right center pillars 72 and also connects the passenger compartment first cross member 81 described later and the passenger compartment fourth cross member 85 described later. It is a panel member made of aluminum and forms a partition wall at the rear of the vehicle in the vehicle interior portion 7.
Similar to the dash panel 78, the rear wall portion 80 is formed in a front view gate shape with the lower part of the vehicle open so that the lower end near the center in the vehicle width direction is continuous with the floor tunnel 82 described later. Has been done.

Further, as shown in FIGS. 2 and 4, the first cross member 81 in the passenger compartment connects the left and right center pillars 72 in the vehicle width direction at a position below the vehicle in the vertical direction of the vehicle in the center pillar 72. ing.

Specifically, as shown in FIG. 4, the passenger compartment first cross member 81 has an aluminum alloy upper panel 811 forming the front surface and the upper surface of the passenger compartment first cross member 81, and the vehicle lower side with respect to the upper panel 811. The lower panel 812 made of aluminum alloy forming the lower surface and the rear surface of the first cross member 81 of the passenger compartment is joined to form a closed cross section in the vertical cross section along the front-rear direction of the vehicle. There is.

Further, as shown in FIGS. 1 and 2, the floor tunnel 82 connects the dash panel 78 and the rear wall portion 80 in the vehicle front-rear direction at substantially the center of the vehicle interior portion 7 in the vehicle width direction.
Specifically, as shown in FIGS. 6 and 7, the floor tunnel 82 is composed of a pair of left and right side wall panels 821 forming side walls in the vehicle width direction and an upper surface panel 822 forming the upper surface of the floor tunnel 82. The cross-sectional shape in the vertical cross-section along the direction is configured to be a substantially tunnel-shaped cross-section. The pair of left and right side wall panels 821 and the upper surface panel 822 in the floor tunnel 82 are made of aluminum alloy panel members.

As shown in FIGS. 7 and 8, the side wall panel 821 has a substantially flat plate shape having a thickness in the vehicle width direction in a vertical cross section along the vehicle width direction, and the lower end is a tunnel side frame 88 described later. Is joined. The side wall panel 821 is formed to have a length in the vehicle vertical direction that projects upward from the upper surface of the upper surface panel 822 (upper surface portion 822c described later).

Then, the portion of the side wall panel 821 that protrudes upward from the upper surface panel 822 sandwiches the tunnel upper frame 89 (near the rear end of the frame front portion 891 and the frame rear portion 892 described later) described later. It is joined to the outer side surface portion 89d of the frame 89.

As shown in FIGS. 6 to 8, the top panel 822 has a substantially gate-shaped cross section in which the lower part of the vehicle is open in the vertical cross section along the vehicle width direction, and is inside the side wall panel 821 in the vehicle width direction. The width of the left and right joint surface portions 822a joined to the surface of the vehicle, the left and right inclined surface portions 822b (see FIG. 8) inclined inward in the vehicle width direction from the upper end of the joint surface portion 822a, and the upper end of the inclined surface portion 822b. They are connected in the direction and integrally formed with the upper surface portion 822c which is the upper surface of the floor tunnel 82.

As shown in FIGS. 6 to 8, the inclined surface portion 822b is formed so as to become wider from the front of the vehicle to the rear of the vehicle.
As shown in FIGS. 6 to 8, in the substantially center of the upper surface portion 822c in the vehicle width direction, a concave portion is projected downward from the front of the vehicle toward the rear of the vehicle in a vertical cross section along the width direction of the vehicle. A groove-shaped groove portion 822d is formed along the vehicle front-rear direction.

Further, at the lower end of the floor tunnel 82, as shown in FIGS. 2 and 6, the passenger compartment third cross member 84 and the passenger compartment fourth cross member 85, which will be described later, are arranged and a seat rail (not shown). The seat rail mounting member 95 to which (omitted) is connected is joined.

Further, as shown in FIGS. 2 to 4, the pair of left and right passenger compartment second cross members 83 connect the vicinity of the front end of the side sill 73 and the vicinity of the front end of the floor tunnel 82 in the vehicle width direction. The second cross member 83 in the passenger compartment is formed by joining an aluminum alloy upper panel and an aluminum alloy lower panel so that the cross section in the vertical cross section along the front-rear direction of the vehicle forms a closed cross section having a substantially rectangular cross section. Has been done.
A connecting member 12 to which the lower center frame 36 and the tunnel side frame 88 are connected is joined to the lower surface of the second cross member 83 in the passenger compartment on the inner side in the vehicle width direction.

Further, as shown in FIGS. 2 to 4, the pair of left and right passenger compartment third cross members 84 connect the side sill 73 and the floor tunnel 82 in the vehicle width direction at substantially the center of the passenger compartment portion 7 in the vehicle front-rear direction. ing.
Specifically, the passenger compartment third cross member 84 is an extruded member made of an extruded aluminum alloy, and is formed in a substantially tubular body having a substantially trapezoidal closed cross section extended in the vehicle width direction. ..

Further, a side frame connecting member 882 that connects the side frame front portion 881 of the tunnel side frame 88 and the side frame rear portion 883 is joined to the lower surface of the third cross member 84 in the vehicle interior in the vehicle width direction. ..
A steering wheel S operated by an occupant is arranged above the vehicle of the third cross member 84 in the passenger compartment. Around the steering wheel S, the legs of the occupant seated in the driver's seat 87, particularly around the knees, are located.

Further, as shown in FIGS. 2 to 4, the pair of left and right passenger compartment fourth cross members 85 connect the vicinity of the rear end of the side sill 73 and the vicinity of the rear end of the floor tunnel 82 in the vehicle width direction. The fourth cross member 85 in the passenger compartment is formed by joining an aluminum alloy upper panel and an aluminum alloy lower panel so that the cross section in the vertical cross section along the front-rear direction of the vehicle forms a closed cross section having a substantially rectangular cross section. Has been done.

Further, as shown in FIG. 2, the floor panel 86 has an opening between the second cross member 83 in the passenger compartment and the third cross member 84 in the passenger compartment between the side sill 73 and the floor tunnel 82, as well as the first passenger compartment. The opening between the 3 cross member 84 and the 4th cross member 85 in the passenger compartment is closed, and the cross member 8 is formed so as to form the floor surface of the passenger compartment 7.
Further, as shown in FIG. 2, the driver's seat 87 is placed between the third cross member 84 in the passenger compartment and the fourth cross member 85 in the passenger compartment so as to be slidable in the front-rear direction of the vehicle.

Further, as shown in FIG. 3, the pair of left and right tunnel side frames 88 are arranged along both ends of the floor tunnel 82 in the vehicle width direction in the bottom view.
Specifically, as shown in FIG. 3, the tunnel side frame 88 has a side frame front portion 881 extending in the front-rear direction of the vehicle from the front end of the floor tunnel 82 to the third cross member 84 in the passenger compartment when viewed from the bottom. , The aluminum die-cast side frame connecting member 882 joined near the inner end in the vehicle width direction of the passenger compartment third cross member 84, and the range from the passenger compartment third cross member 84 to the rear end of the floor tunnel 82. Is composed of a side frame rear portion 883 extending in the front-rear direction of the vehicle.

The front portion 881 of the side frame is an extruded member made of an extruded aluminum alloy, and is formed in a substantially tubular body having a substantially rectangular closed cross section extended in a predetermined direction. As shown in FIG. 3, the rear end of the side frame front portion 881 is located inside in the vehicle width direction with respect to the front end so as to be continuous from the rear end of the lower center frame 36 with one end in a predetermined direction as the front end. In this state, it is arranged in the passenger compartment 7 of the vehicle 1.
Then, as shown in FIG. 3, the front end of the side frame front portion 881 is joined to the connecting member 12 provided at the rear end of the lower center frame 36, and the rear end is joined to the side frame connecting member 882.

As shown in FIG. 8, the rear side frame 883 has an aluminum alloy upper panel 883a and an aluminum alloy lower panel 883b joined to each other, and the cross-sectional shape in the vertical cross section along the vehicle width direction is substantially rectangular. It is formed to have a closed cross section. As shown in FIG. 3, the front end of the side frame rear portion 883 is joined to the side frame connecting member 882, and the rear end is joined to the vehicle interior fourth cross member 85.

Further, as shown in FIG. 1, the pair of left and right tunnel upper frames 89 extend downward to the rear of the vehicle from the front end joined to the front frame connecting member 94 in a side view, and then extend toward the rear of the vehicle. It is installed.
Further, as shown in FIG. 2, the pair of left and right tunnel upper frames 89 extend inward in the vehicle width direction from the front end joined to the front frame connecting member 94 and to the rear of the vehicle in a plan view, and then the floor. It is formed in a shape extending toward the rear of the vehicle above the vehicle in the tunnel 82.

Then, as shown in FIGS. 1 and 2, the left and right tunnel upper frames 89 have the upper center frame 35 of the front vehicle body 3 and the first cross member 81 of the passenger compartment at substantially the center of the passenger compartment 7 in the vehicle width direction. Is connected in the front-rear direction of the vehicle.
Specifically, the tunnel upper frame 89 is an extruded member made of an aluminum alloy that has been extruded, and has a closed cross section having a substantially rectangular cross section that is chamfered on the outside in the vehicle width direction and the upper corner of the vehicle in a predetermined direction. It is formed in an extended substantially tubular body.

More specifically, as shown in FIGS. 7 and 8, the tunnel upper frame 89 includes the lower surface of the tunnel upper frame 89, the lower surface portion 89a forming the upper surface, and the upper surface portion 89b in the vertical cross section along the vehicle width direction. , The inner side surface portion 89c forming the side surface of the tunnel upper frame 89, the outer side surface portion 89d, and the chamfered portion 89e have a closed cross-sectional shape having a substantially rectangular cross section in which the outer corner in the vehicle width direction and the upper corner of the vehicle are chamfered. Is formed in.

As shown in FIGS. 7 and 8, the lower surface portion 89a is formed in a substantially flat cross-sectional shape having a thickness in the vertical direction of the vehicle in a vertical cross section along the vehicle width direction.
As shown in FIGS. 7 and 8, the upper surface portion 89b has a thickness in the vertical direction of the vehicle in a vertical cross section along the vehicle width direction, and is formed into a substantially flat cross-sectional shape narrower than the lower surface portion 89a. Has been done.

As shown in FIGS. 7 and 8, the inner side surface portion 89c has an inner end portion in the vehicle width direction on the lower surface portion 89a and an inner end portion in the vehicle width direction on the upper surface portion 89b in a vertical cross section along the vehicle width direction. It is formed in a substantially flat cross-sectional shape that connects the portions substantially vertically.
As shown in FIGS. 7 and 8, the outer side surface portion 89d has a vertical cross section along the vehicle width direction, from the outer end portion of the lower surface portion 89a in the vehicle width direction to the upper side of the vehicle and slightly inward in the vehicle width direction. It is formed in a substantially flat cross-sectional shape extending toward the surface.

As shown in FIGS. 7 and 8, the chamfered portion 89e extends from the upper end of the outer side surface portion 89d toward the upper side of the vehicle and inward in the vehicle width direction in the vertical cross section along the vehicle width direction. Its tip is formed in a substantially flat cross-sectional shape connected to the outer end of the upper surface portion 89b in the vehicle width direction.
The left and right tunnel upper frames 89 are formed so that the length in the vehicle width direction of the cross-sectional shape in the vertical cross section along the vehicle width direction is half or less of the length in the vehicle width direction in the vicinity of the upper part of the floor tunnel 82. ing.

More specifically, the tunnel upper frame 89 having the above-mentioned cross-sectional shape is attached to the upper center frame 35 via the front frame connecting member 94 as shown in FIGS. 1, 2, and 9. The frame front portion 891 to which the front end is connected and the frame rear portion 892 that is mounted and fixed on the upper surface portion 822c of the floor tunnel 82 and extends to the rear of the vehicle along the upper surface portion 822c of the floor tunnel 82 are integrally formed. ..

As shown in FIG. 2, the frame front portion 891 is directed from the front end toward the rear of the vehicle and inward in the vehicle width direction along the above-mentioned virtual straight line L1 in the plan view so as to be continuous from the upper center frame 35 in the plan view. It is extended and formed at the first predetermined position P1 in a shape close to the other tunnel upper frame 89 (see FIG. 7).

As shown in FIG. 2, the rear portion of the frame front portion 891 is rearward of the vehicle from a position slightly in front of the vehicle from the first predetermined position P1 toward the upper surface portion 822c of the floor tunnel 82 in a plan view. It bends gently toward.
As shown in FIGS. 1 and 4, the frame front portion 891 extends toward a position rearward of the vehicle from the first predetermined position P1 in a side view.

Specifically, as shown in FIGS. 1 and 4, in a state where the driver's seat 87 is located at the most rearward sliding position of the vehicle, the position substantially centered in the vehicle front-rear direction on the seat surface portion 87a of the driver's seat 87 is defined as the seat center. The position of the upper surface portion 822c of the floor tunnel 82 at a position substantially the same as the center of the seat in the vehicle front-rear direction is defined as the second predetermined position P2.

As shown in FIGS. 1 and 4, the second predetermined position P2 is located at substantially the same position as the position of the arm portion of the occupant seated in the driver's seat 87, particularly the elbow portion, in the vehicle front-rear direction. The second predetermined position P2 is set to a position slightly above the vehicle surface portion 822c.

Then, in the side view, the virtual straight line connecting the rear fitting portion 94e of the front frame connecting member 94 and the second predetermined position P2 is referred to as the side view virtual straight line L2.
On the other hand, as shown in FIG. 1 and FIG. 4, the frame front portion 891 extends from the front end toward the rear lower part of the vehicle so as to follow the side view virtual straight line L2 in the side view.

On the other hand, as shown in FIG. 2, the frame rear portion 892 extends substantially linearly from the rear end of the frame front portion 891 toward the rear of the vehicle along the upper surface portion 822c of the floor tunnel 82 in a plan view. It is formed in a shape. As shown in FIGS. 2 and 8, in the frame rear portion 892, the inner side surface portion 89c is joined to the inner side surface portion 89c in the other frame rear portion 892.

Further, as shown in FIGS. 1 and 4, the frame rear portion 892 is extended downward to the rear of the vehicle along the side view virtual straight line L2 so as to be continuous from the frame front portion 891 in the side view, and then the second frame rear portion 892. It is extended toward the rear of the vehicle in the vicinity of the predetermined position P2.

That is, as shown in FIG. 8, in the frame rear portion 892, the portion in front of the vehicle from the second predetermined position P2 is separated above the vehicle with respect to the upper surface portion 822c of the floor tunnel 82, and the second predetermined position P2. A portion behind the vehicle is mounted on the upper surface portion 822c of the floor tunnel 82.
Then, a portion of the rear portion of the frame 892 that is rearward of the vehicle from the second predetermined position P2 is joined to the upper surface portion 822c of the floor tunnel 82 as shown in FIG.

As shown in FIGS. 6 and 7, the pair of left and right tunnel upper frames 89 are made of an aluminum alloy that connects and reinforces the rear portion of the frame front portion 891 separated in the vehicle width direction in the vehicle width direction. Reinforcing members 96 are joined.

As shown in FIGS. 6 and 7, the reinforcing member 96 is formed from a reinforcing main body 96a having a substantially inverted gate shape with an opening above the vehicle and an upper end of the reinforcing main body 96a in a cross section along the vehicle width direction. It is integrally formed with a flange portion 96b extending outward in the vehicle direction.

As shown in FIGS. 6 and 11, the reinforcing main body portion 96a is joined to the upper surface portion 822c of the floor tunnel 82 on the front side of the vehicle in a vertical cross section along the vehicle front-rear direction, and is separated from the upper surface portion 822c toward the rear of the vehicle. That is, it is formed in a shape that becomes shallower toward the rear of the vehicle.

As shown in FIG. 6, the length of the reinforcing main body 96a in the vehicle width direction becomes shorter from the front of the vehicle to the rear of the vehicle in accordance with the distance between the left and right frame front portions 891 in a plan view. Is formed.
As shown in FIG. 6, the flange portion 96b is formed along the upper end edge of the reinforcing main body portion 96a. As shown in FIGS. 7 and 11, the flange portion 96b is joined to the lower surfaces of the left and right frame front portions 891.

As described above, the pair of left and right front suspension support members 31 that support the front suspension 2 of the vehicle 1 and the pair of left and right tunnel upper frames 89 that extend the interior of the vehicle 1 in the front-rear direction of the vehicle along the floor tunnel 82. In the side view, the vehicle body structure of the vehicle 1 is provided with a pair of left and right upper center frames 35 having a front end connected to the front suspension support member 31 and extending upward from the floor tunnel 82, and a driver's seat 87. Is located at the most rearward sliding position of the vehicle. With the position of 822c as the second predetermined position P2, the tunnel upper frame 89 extends from the rear end of the floor tunnel 82 toward the front of the vehicle along the upper surface portion 822c of the floor tunnel 82 in a side view, and then the second position. At the predetermined position P2, the vehicle is formed in a shape extending upward and forward toward the rear end of the upper center frame 35, and is connected to the rear end of the upper center frame 35, so that the vehicle body rigidity of the vehicle 1 can be improved. , The driver's seat 87 can be arranged at a desired position.

Specifically, since the upper center frame 35 and the tunnel upper frame 89 are connected, the vehicle body structure of the vehicle 1 can improve the support rigidity of the front suspension 2 and the vehicle body rigidity.

Further, since the tunnel upper frame 89 extends from the second predetermined position P2 toward the upper center frame 35, the position behind the vehicle from the center of the seat is set to the second predetermined position P2, as compared with the case where the position is set to the second predetermined position P2. The vehicle body structure of the vehicle 1 can prevent the occupant's arms, particularly around the elbows, from coming into contact with the portion in front of the vehicle from the second predetermined position P2 in the tunnel upper frame 89.

In addition, as compared with the case where the position in front of the vehicle from the center of the seat is set to the second predetermined position P2, the vehicle body structure of the vehicle 1 is the portion in front of the vehicle than the second predetermined position P2 in the tunnel upper frame 89. , The relative angle with the rear portion of the vehicle can be made smaller than the second predetermined position P2 in the tunnel upper frame 89.

As a result, the vehicle body structure of the vehicle 1 suppresses the decrease in the rigidity of the tunnel upper frame 89 and the decrease in the load transmission efficiency of the tunnel upper frame 89 in the vicinity of the second predetermined position P2, and suppresses the decrease in the occupant's arm and the tunnel upper frame 89. Contact with can be prevented. Therefore, in the vehicle body structure of the vehicle 1, the driver's seat 87 on which the occupant sits can be arranged inside the vehicle interior in the vehicle width direction.
Therefore, the vehicle body structure of the vehicle 1 can improve the vehicle body rigidity of the vehicle 1 and can arrange the driver's seat 87 at a desired position.

Further, by providing a reinforcing member 96 for connecting and reinforcing the vicinity of the rear end of the frame front portion 891 of the left and right tunnel upper frames 89 separated from each other in the vehicle width direction in front of the second predetermined position P2. In the vehicle body structure of the vehicle 1, a portion in front of the vehicle (near the rear end of the frame front portion 891) with respect to the second predetermined position P2 in the tunnel upper frame 89 can be reinforced by the reinforcing member 96. That is, the vehicle body structure of the vehicle 1 can improve the rigidity in the vicinity of the rear ends of the left and right frame front portions 891.

Further, for example, when a load is input to the front ends of the left and right tunnel upper frames 89 at different timings, the vehicle body structure of the vehicle 1 suppresses the left and right tunnel upper frames 89 from being displaced in different directions by the reinforcing member 96. be able to.
At this time, the vehicle body structure of the vehicle 1 can transmit the load acting on one tunnel upper frame 89 to the other tunnel upper frame 89 via the reinforcing member 96.

As a result, the vehicle body structure of the vehicle 1 can suppress the torsional deformation of the pair of left and right tunnel upper frames 89, and can efficiently transmit the loads input at different timings in the front-rear direction of the vehicle.
Therefore, in the vehicle body structure of the vehicle 1, the load transmission efficiency can be further improved by the reinforcing member 96 that connects and reinforces the left and right tunnel upper frames 89 separated in the vehicle width direction in front of the vehicle from the second predetermined position P2. , The vehicle body rigidity of the vehicle 1 can be further improved.

In addition, in the vehicle body structure of the vehicle 1, the reinforcing member 96 suppresses a sudden change in rigidity from the frame front portion 891 to the frame rear portion 892, and the stress concentration portion is located near the boundary between the frame front portion 891 and the frame rear portion 892. This can be more reliably prevented by the reinforcing member 96.

Further, since the tunnel upper frame 89 is composed of an internally hollow extrusion member formed by extrusion molding, the vehicle body structure of the vehicle 1 is a portion in front of the vehicle from the second predetermined position P2 and a second portion. Compared to the tunnel upper frame 89 in which the part behind the vehicle is separated from the predetermined position P2, the increase in the number of parts can be suppressed and the decrease in the load transmission efficiency in the vicinity of the second predetermined position P2 is suppressed. be able to.
Therefore, in the vehicle body structure of the vehicle 1, the vehicle body rigidity of the vehicle 1 can be further improved by the left and right tunnel upper frames 89 composed of the extruded members without further impairing the load transmission efficiency.

Further, in plan view, the upper center frame 35 is along a plan view virtual straight line L1 connecting the front suspension support member 31 and the upper surface portion 822c of the floor tunnel 82 located in front of the vehicle from the second predetermined position P2. The tunnel upper frame 89 is formed in an extending shape, and the front end of the tunnel upper frame 89 is connected to the rear end of the upper center frame 35 in a plan view, and the frame front portion 891 extending along a virtual straight line L1 in a plan view and a frame front portion 891 in a plan view. The vehicle body structure of the vehicle 1 is formed by extending from the frame front portion 891 to the rear of the vehicle along the upper surface portion 822c of the floor tunnel 82 and forming the frame rear portion 892 adjacent to or connected to the other tunnel upper frame 89. The driver's seat 87 can be arranged at a more desired position without impairing the load transmission efficiency of the vehicle body.

Specifically, for example, in the plan view, when the frame front portion 891 of the tunnel upper frame 89 is formed along the plan view virtual straight line L1 connecting the front suspension support member 31 and the second predetermined position P2, the frame The front portion 891 is extended from a position close to the occupant to the outside in the vehicle width direction and toward the front of the vehicle. Therefore, the legs of the occupant seated in the driver's seat 87, particularly around the knees, easily come into contact with the front portion 891 of the frame.

On the other hand, in the plan view, the front portion of the frame is along the plan view virtual straight line L1 connecting the upper surface portion 822c of the floor tunnel 82 located in front of the vehicle from the second predetermined position P2 and the front suspension support member 31. By forming the 891, the vehicle body structure of the vehicle 1 can make it difficult for the legs of the occupant seated in the driver's seat 87, particularly around the knees, to come into contact with the front frame 891. Therefore, in the vehicle body structure of the vehicle 1, the driver's seat 87 on which the occupant sits can be arranged inside the vehicle interior in the vehicle width direction.

Further, since the frame front portion 891 of the tunnel upper frame 89 extends substantially linearly so as to be continuous from the upper center frame 35 in the plan view, the vehicle body structure of the vehicle 1 is the tunnel upper frame 89 in the plan view. The relative angle between the frame front portion 891 and the upper center frame 35 can be made as small as possible. Therefore, the vehicle body structure of the vehicle 1 can suppress a decrease in load transmission efficiency between the upper center frame 35 and the tunnel upper frame 89.

Therefore, the vehicle body structure of the vehicle 1 is a tunnel upper frame along a plan view virtual straight line L1 connecting the upper surface portion 822c of the floor tunnel 82 located in front of the second predetermined position P2 and the front suspension support member 31. By forming the frame front portion 891 of the 89, the driver's seat 87 can be arranged at a more desired position without impairing the load transmission efficiency of the vehicle body.

Further, a dash panel 78 connected to the front end of the floor tunnel 82 and a cowl box 79 connected to the upper end of the dash panel 78 and extending in the vehicle width direction are provided, and the rear end of the upper center frame 35 and the tunnel upper are provided. The front end of the frame 89 is connected to the lower end of the cowl box 79 via the front frame connecting member 94, and the front frame connecting member 94 is formed in a shape forming a part of the cowl box 79. The body structure of the vehicle 1 can improve the body rigidity of the vehicle 1 by further suppressing a decrease in load transmission efficiency between the upper center frame 35 and the tunnel upper frame 89.

Specifically, since the rear end of the upper center frame 35 is located above the vehicle above the front end and the front end of the tunnel upper frame 89 is located above the vehicle above the rear end, the upper center frame 35 and the tunnel upper frame 89 Are connected in a state of being bent in a substantially inverted V shape in the side view.

Therefore, by connecting the upper center frame 35 and the tunnel upper frame 89 via the front frame connecting member 94 forming a part of the cowl box 79, the vehicle body structure of the vehicle 1 is the upper center frame 35 and the tunnel upper. The connection rigidity at the connection portion with the frame 89 can be increased.
Therefore, the vehicle body structure of the vehicle 1 can improve the vehicle body rigidity of the vehicle 1 by further suppressing a decrease in the load transmission efficiency between the upper center frame 35 and the tunnel upper frame 89.

Further, by providing the aluminum die-cast connecting member 13 for connecting the upper surface of the rear end of the upper center frame 35 and the upper portion 94b of the front frame connecting member 94, the vehicle body structure of the vehicle 1 is from the front of the vehicle. When a load is applied, the rear end of the upper center frame 35 can be prevented from being displaced upward by the connecting member 13. As a result, the vehicle body structure of the vehicle 1 can efficiently transmit the load from the upper center frame 35 to the tunnel upper frame 89.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The suspension support member of the present invention corresponds to the front suspension support member 31 of the embodiment.
Similarly below
The tunnel frame corresponds to the tunnel upper frame 89,
The body skeleton frame corresponds to the upper center frame 35,
The predetermined position corresponds to the second predetermined position P2,
The virtual straight line corresponds to the plan view virtual straight line L1.
The connecting member corresponds to the front frame connecting member 94,
The present invention is not limited to the configuration of the above-described embodiment, and many embodiments can be obtained.

For example, in the above-described embodiment, the frame rear portions 892 of the left and right tunnel upper frames 89 are joined to each other, but the present invention is not limited to this, and the frame rear portion 892 is connected by a connecting member connecting in the vehicle width direction. May be good.
Alternatively, for example, the frame rear portion 892 may be adjacent to the upper surface portion 822c of the floor tunnel 82 with a gap in which a slight molding variation is added in the vehicle width direction.

Further, the frame front portion 891 of the tunnel upper frame 89 is connected and reinforced by a reinforcing member 96 having a substantially reverse gate shape in the vertical cross section along the vehicle width direction, but the present invention is not limited to this, and for example, another As a reinforcing member 97 composed of a pair of upper and lower flat plate members connecting the upper surface portion 89b and the lower surface portion 89a of the frame front portion 891 separated in the vehicle width direction as shown in FIG. May be good.

Alternatively, the above-mentioned reinforcing member having a substantially inverted gate shape in cross section and a substantially flat plate member connecting the upper surface portion 89b of the frame front portion 891 connect and reinforce the rear portion of the frame front portion 891 separated in the vehicle width direction. Reinforcing members may be configured.

1 ... Vehicle 2 ... Front suspension 31 ... Front suspension support member 35 ... Upper center frame 78 ... Dash panel 79 ... Cowl box 82 ... Floor tunnel 87 ... Driver's seat 87a ... Seat surface 89 ... Tunnel upper frame 94 ... Front frame connecting member 96 ... Reinforcing member 97 ... Reinforcing member 822c ... Upper surface portion 891 ... Frame front portion 892 ... Frame rear portion L1 ... Plane view virtual straight line P2 ... Second predetermined position

Claims (5)

A pair of left and right suspension support members that support the front suspension of the vehicle,
It is a vehicle body structure including a pair of left and right tunnel frames extending in the front-rear direction of the vehicle along the floor tunnel in the vehicle interior.
In the side view, the front end is connected to the suspension support member, and a pair of left and right body frame frames extending upward from the floor tunnel are provided.
In a state where the driver's seat is located at the most rearward sliding position of the vehicle, the position of the driver's seat in the front-rear direction of the vehicle is defined as the center of the seat, and the upper surface of the floor tunnel at a position substantially the same as the center of the seat in the front-rear direction of the vehicle With the position as the predetermined position
The tunnel frame
In the side view, it is formed in a shape that extends from the rear end of the floor tunnel toward the front of the vehicle along the upper surface of the floor tunnel and then extends upward in the front of the vehicle toward the rear end of the vehicle body skeleton frame at the predetermined position. At the same time, the vehicle body structure of the vehicle connected to the rear end of the vehicle body skeleton frame. The vehicle body structure according to claim 1, further comprising a reinforcing member for connecting and reinforcing the left and right tunnel frames separated from each other in the vehicle width direction in front of the predetermined position. The tunnel frame
The vehicle body structure according to claim 1 or 2, which is composed of an internally hollow extrusion member formed by extrusion molding. The body skeleton frame
In a plan view, the suspension support member is formed in a shape extending along a virtual straight line connecting the suspension support member and the upper surface of the floor tunnel located in front of the vehicle from the predetermined position.
The tunnel frame
In a plan view, the front end is connected to the rear end of the vehicle body skeleton frame, and the front portion of the frame extending along the virtual straight line is
Any one of claims 1 to 3, which extends from the front part of the frame to the rear of the vehicle along the upper surface of the floor tunnel and is formed by the rear part of the frame adjacent to or connected to the other tunnel frame in a plan view. The vehicle body structure described in one. A dash panel connected to the front end of the floor tunnel,
It is connected to the upper end of the dash panel and has a cowl box that extends in the vehicle width direction.
The rear end of the vehicle body skeleton frame and the front end of the tunnel frame
In the vicinity of the lower end of the cowl box, they are connected via a connecting member.
The vehicle body structure according to any one of claims 1 to 4, wherein the connecting member is formed in a shape forming a part of the cowl box.

Images