JP2019189162A - Body structure of vehicle - Google Patents

Abstract

To provide a body structure of a vehicle 1 which can improve body rigidity of the vehicle 1 and can locate a driver seat 87 at a desired position.SOLUTION: A body structure of a vehicle 1 comprises: a pair of left and right front suspension support members 31; and a pair of left and right tunnel upper frames 89 which extend in a vehicle longitudinal direction along a floor tunnel 82. The body structure comprises: a pair of left and right upper center frames 35 which extend from forward ends thereof connected to the front suspension support members 31 to a vehicle width direction inner side and the rear of the vehicle in a plan view. The tunnel upper frames 89 are integrally formed by a frame front part 891, which extends from a forward end thereof connected toward a rear end of the upper center frame 35 to a vehicle width direction inner side and an upper surface part 822c of the floor tunnel 82 in a plan view, and a frame rear part 892 which extends to the rear of the vehicle along the upper surface part 822c of the floor tunnel 82 and is connected to the other tunnel upper frame 89 in a plan view.SELECTED DRAWING: Figure 2

Description

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

  In a vehicle such as an automobile, it is known that when an occupant operates a steering wheel, a load that twists the entire vehicle body acts on the vehicle body via a suspension. Such a load not only gives the occupant an uncomfortable feeling that the entire vehicle body is twisted, but also causes the occupant to feel that the response 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 the steering operation and secures the steering stability by improving the rigidity of the vehicle body against the load acting on the vehicle body via the suspension.
Furthermore, since a vehicle such as a sports car often requires higher steering stability than a general vehicle, a technique for further improving the vehicle body rigidity has been proposed.

  For example, Patent Document 1 discloses a pair of left and right first tunnels that are disposed on the upper surface of a floor tunnel (tunnel portion) that extends in the vehicle front-rear direction in the vehicle interior and spaced apart in the vehicle width direction and that extends in the vehicle front-rear direction. A second branch part that includes a frame and a front frame having a rear part branched in three directions, and a first branch part that is one of the branched rear parts of the front frame is connected to the floor panel and is one of the branched rear parts Is connected to a first tunnel frame via a dash panel, and a vehicle body structure is disclosed in which a third branch portion, one of the branched rear portions, is connected to a hinge pillar. Thereby, in patent document 1, it is supposed that the vehicle body rigidity of a vehicle can be improved.

  By the way, as the seating position of the occupant is positioned on the outer side in the vehicle width direction in the passenger compartment, the behavior of the vehicle that the occupant feels when the vehicle turns to the right and the behavior of the vehicle that the occupant feels when the vehicle turns to the left The difference tends to increase. Further, in the case of a vehicle such as a sports car, the seating position of the occupant is preferably close to the center of gravity position of the vehicle body where the occupant can easily feel the behavior of the vehicle. For this reason, there is a need to arrange the driver's seat on which the occupant is seated as far as possible on the inner side in the vehicle width direction.

  However, in the case of a vehicle provided with tunnel frames at both ends in the vehicle width direction on the upper surface of the floor tunnel as in Patent Document 1, the space above the seat surface portion of the driver's seat is compressed by the tunnel frame. There has been a problem that the seat cannot be arranged at a desired position, that is, inside the vehicle width direction.

JP 2009-101815 A

  In view of the above-described problems, an object of the present invention is to provide a vehicle body structure for a vehicle in which the vehicle body rigidity of the vehicle can be improved and a driver's seat can be disposed at a desired position.

  The present invention is a vehicle body structure including a pair of left and right suspension support members that support a front suspension of a vehicle, and a pair of left and right tunnel frames that extend in a vehicle longitudinal direction along a floor tunnel in a vehicle interior of the vehicle. A pair of left and right vehicle body skeleton frames extending from the front end connected to the suspension support member in the vehicle width direction and in the vehicle width direction outside of the floor tunnel in the vehicle width direction in a plan view, Is a frame front portion extending in the vehicle width direction from the front end connected to the rear end of the vehicle body skeleton frame in the plan view and toward the rear of the vehicle toward the upper surface of the floor tunnel, and in the plan view, the frame front portion. The rear tunnel extends from the rear end along the upper surface of the floor tunnel to the rear of the vehicle and the other tunnel frame. Characterized in that integrally formed at the near or concatenated frame rear portion.

  It is preferable that the pair of left and right tunnel frames have a vehicle width direction length that is the sum of the left and right frame rear portions in a state where they are close or connected to each other and shorter than the vehicle width direction length on the upper surface of the floor tunnel.

According to the present invention, the vehicle body rigidity of the vehicle can be improved and the driver's seat can be arranged at a desired position.
Specifically, since the vehicle body skeleton 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 vehicle body rigidity.

  Furthermore, since the rear part of the tunnel frame is adjacent to or connected to the other tunnel frame in the vehicle interior, the vehicle body structure of the vehicle has a shorter length in the vehicle width direction when the left and right frame rear parts are combined in plan view. Can be suppressed.

Thereby, the vehicle body structure of the vehicle can suppress the space above the vehicle from the seat surface portion of the driver's seat from being pressed by the tunnel frame. For this reason, the vehicle body structure of a vehicle can arrange | position the driver's seat which a passenger | crew seats inside the vehicle width direction inside a vehicle interior.
Therefore, the vehicle body structure of the vehicle can improve the vehicle body rigidity of the vehicle and can arrange the driver's seat at a desired position.

As an aspect of the present invention, the left and right vehicle body skeleton frames are formed in a shape extending substantially linearly along a virtual straight line connecting the suspension support member and a predetermined position on the upper surface of the floor tunnel in plan view, The frame front portion of the tunnel frame is formed in a shape extending substantially linearly along the virtual straight line in plan view, and the predetermined position is substantially the same as the position of the steering wheel in the vehicle front-rear direction in plan view. It may be a position in the front-rear direction.
According to the present invention, the vehicle body structure of the vehicle can arrange the driver's seat at a desired position, and can stably improve the vehicle body rigidity without impairing the load transmission efficiency.

  Specifically, the vehicle body structure of the vehicle is formed by forming the frame front portion of the tunnel frame in a shape extending toward the upper surface of the floor tunnel at a position in the vehicle longitudinal direction substantially the same as the position of the steering wheel in the vehicle longitudinal direction. The arm part of the occupant located behind the steering wheel and the lap of the occupant's knee located in the vicinity of the steering wheel are in contact with the front part of the frame whose front end is located on the outer side in the vehicle width direction with respect to the rear end. Can be prevented. For this reason, in the vehicle body structure of the vehicle, the driver's seat can be disposed more inside in the vehicle width direction.

  Further, since the frame front portion of the tunnel frame extends substantially linearly so as to be continuous from the vehicle body skeleton frame in plan view, the vehicle body structure of the vehicle includes the frame front portion of the tunnel frame and the vehicle skeleton in plan view. The relative angle with the frame can be made as small as possible.

  In addition, since the vehicle body structure of the vehicle can position the predetermined position further to the rear of the vehicle than when the position in front of the vehicle is set to the predetermined position relative to the steering wheel, for example, The relative angle of can be made smaller.

As a result, the vehicle body structure suppresses a decrease in load transmission efficiency in the range from the vehicle body skeleton frame to the frame rear portion of the tunnel frame, and the boundary between the frame front portion and the frame rear portion, which is a bent portion of the tunnel frame in plan view. It is possible to prevent the vicinity from becoming a stress concentration site.
Accordingly, the vehicle body structure of the vehicle can arrange the driver's seat at a desired position, and can stably improve the vehicle body rigidity of the vehicle without impairing the load transmission efficiency.

Moreover, as an aspect of the present invention, the tunnel frame may be configured by an internal hollow extruded member formed by extrusion molding.
According to the present invention, the vehicle body structure of the vehicle can suppress an increase in the number of parts as compared with the case where the front part of the frame and the rear part of the frame are configured separately, and the load between the front part of the frame and the rear part of the frame. A decrease in transmission efficiency can be suppressed.
Therefore, the vehicle body structure of the vehicle can further improve the vehicle body rigidity without deteriorating the load transmission efficiency due to the left and right tunnel frames formed of the extrusion members.

As another aspect of the present invention, a frame rear portion of the tunnel frame may be joined to the frame rear portion of the other tunnel frame.
According to the present invention, the vehicle body structure of the vehicle can distribute and transmit the load transmitted from the frame front portion of the tunnel frame to the frame rear portion continuous from the frame front portion and the frame rear portion of the other tunnel frame.

As a result, the vehicle body structure of the vehicle can more reliably prevent the vicinity of the boundary between the front portion of the frame and the rear portion of the frame from becoming a stress concentration portion, and more reliably improve the load transmission efficiency in the pair of left and right tunnel frames. be able to.
Therefore, the vehicle body structure of the vehicle can improve load transmission efficiency and more reliably improve the vehicle body rigidity due to the frame rear portions joined to each other.

Moreover, you may provide the reinforcement member which mutually connects and reinforces the rear end vicinity of the said frame front part in the said tunnel frame as an aspect of this invention.
According to the present invention, the vehicle body structure of the vehicle can reinforce the vicinity of the rear end of the front portion of the frame that is separated in the vehicle width direction by the reinforcing member in plan view. That is, the vehicle body structure of the vehicle can improve the rigidity in the vicinity of the rear end of the front portion of the frame.

  For this reason, for example, when the frame rear portions are joined together, the vehicle body structure suppresses a sudden change in rigidity from the frame front portion to the frame rear portion, and the vicinity of the boundary between the frame front portion and the frame rear portion is reduced. It can prevent more reliably that it becomes a stress concentration part.

Furthermore, for example, when loads are input to the left and right frame front portions at different timings, the vehicle body structure can suppress the rear ends of the left and right frame front portions from being displaced in different directions by the reinforcing members. .
At this time, even if the rear portions of the frames are not joined to each other, the vehicle body structure of the vehicle can transmit the load acting on one tunnel frame to the other tunnel frame via the reinforcing member.

Thus, the vehicle body structure of the vehicle can suppress torsional deformation of the pair of left and right tunnel frames, and can efficiently transmit loads input at different timings to the rear portion of the frame.
Therefore, the vehicle body structure of the vehicle can further improve the load transmission efficiency and further improve the vehicle body rigidity by the reinforcing member that connects and reinforces the vicinity of the rear end of the front portion of the frame.

  According to the present invention, it is possible to provide a vehicle body structure of a vehicle in which the vehicle body rigidity of the vehicle can be improved and the driver's seat can be disposed at a desired position.

The side view which shows the front vehicle body seen from the vehicle left side, and a compartment. The top view which shows the front vehicle body in a planar view, and a vehicle interior part. The bottom view which shows the front vehicle body in a bottom view, and a vehicle interior part. AA arrow sectional drawing in FIG. Sectional drawing which shows the front frame connection member in the longitudinal cross-section along a vehicle front-back direction. The external appearance perspective view which shows the external appearance of the floor tunnel in a vehicle front upper view. BB arrow sectional drawing in FIG. CC sectional view taken on the line in FIG. FIG. 3 is an external perspective view showing an external appearance of the tunnel upper frame when viewed from the front front of the vehicle. The DD arrow directional cross-sectional view in FIG. Sectional drawing which shows the reinforcement member in the longitudinal cross-section along a vehicle front-back direction. Sectional drawing which shows another reinforcement 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 this embodiment is a so-called space frame structure in which a plurality of extruded 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 shows a side view of the front vehicle body 3 and the vehicle compartment 7 viewed from the left side of the vehicle, and FIG. 2 shows a plan view of the front vehicle body 3 and the vehicle compartment 7 in plan view. FIG. 4 shows a bottom view of the front vehicle body 3 and the compartment 7 in a bottom view, and FIG. 4 shows a cross-sectional view taken along the line AA in FIG.

  5 shows a sectional view of the front frame connecting member 94 in a longitudinal section along the longitudinal direction of the vehicle, FIG. 6 shows an external perspective view of the floor tunnel 82 in the vehicle front upper view, and FIG. 8 is a cross-sectional view taken along the line B-B of FIG. 8, FIG. 8 is a cross-sectional view taken along the line C-C in FIG. 2, FIG. 9 is an external perspective view of the tunnel upper frame 89 as viewed from above the vehicle, and FIG. 2 shows a cross-sectional view taken along the line DD in FIG. 2, and FIG. 11 shows a cross-sectional view of the reinforcing member 96 in a vertical cross section along the vehicle front-rear direction.

For clarity of 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 not shown, and FIGS. In FIG. 8, illustration of the floor panel 86 is omitted.
In the drawing, arrows Fr and Rr indicate the front-rear direction, arrow Fr indicates the front, arrow Rr indicates the rear, arrows Rh and Lh indicate the width direction, and arrow Rh indicates the right direction. The arrow Lh indicates the left direction.

As shown in FIG. 1, the vehicle body structure of the vehicle 1 in the present embodiment is 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 a passenger compartment 7 in which an occupant gets into the vehicle.
In this embodiment, the front vehicle body 3 and the vehicle compartment 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 includes a knuckle (not shown) that rotatably supports a front wheel of the vehicle 1 and a plane having a top portion on the outer side in the vehicle width direction. The lower arm 21 having a substantially triangular shape, the upper arm 22 having a substantially triangular shape in plan view with the outer side in the vehicle width direction as the top, and a suspension damper 23 having a lower end connected to the lower arm 21 are configured.

  As shown in FIGS. 1 to 3, the front vehicle body 3 that supports the front suspension 2 is a pair of left and right front suspensions that support the left and right front suspensions 2 disposed at desired positions in front of the vehicle compartment 7. Front suspension support member 31, a pair of left and right upper side frames 32 connecting the front suspension support member 31 and the vehicle 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.

  On the other hand, as shown in FIGS. 1 to 3, the compartment 7 of the vehicle 1 includes a pair of left and right hinge pillars 71 that extend in the vehicle vertical direction at 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 vehicle front-rear direction at positions spaced apart in the vehicle width direction, a pair of left and right vehicle compartment upper side frames (not shown), and a left and right vehicle compartment upper side frame. A front header (not shown), a roof reinforcement (not shown), a rear header (not shown), a dash panel 78 that forms the front wall of the vehicle compartment 7, a cowl box 79, and a vehicle compartment A rear wall portion 80 that forms the rear wall of the portion 7 and a vehicle compartment first cross member 81 are provided.

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

Next, each component of the front vehicle body 3 and the compartment 7 in the vehicle 1 described above will be further described in detail.
First, as described above, the front body 3 includes 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 body 3 of the vehicle 1 and a function of supporting the front suspension 2 in a swingable manner. .

  As shown in FIG. 1, the front suspension support member 31 has a lower arm support portion 311 in which the inner side in the vehicle width direction of the lower arm 21 is swingably connected, and a predetermined distance above the vehicle with respect to the lower arm support portion 311. An upper arm support 312 that is swingably connected to the inner side of the upper arm 22 in the vehicle width direction, a lower arm support 311, a front connection 313 that connects the upper arm support 312, and a rear connection The portion 314 is integrally formed in a substantially square shape in 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 is capable of swinging the upper end of the suspension damper 23 between a portion where the front end portion and the rear end portion of the upper arm 22 are connected and at a position above the upper arm 22 in the vehicle. I support it.

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

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 compartment portion 7.
Specifically, the upper side frame 32 is an extruded member made of aluminum alloy that is formed by extrusion, and is formed in a substantially cylindrical body having a substantially rectangular closed section extending in a predetermined direction.

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

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 in the approximate center in the vehicle longitudinal direction, as shown in FIG.
The pair of left and right reinforcing frames 40 are extruded members made of aluminum alloy that are extruded, and are formed in a substantially cylindrical 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 in the center in the vehicle front-rear direction, and the lower end is joined to the front surface of the upper part 90 of the collision load absorbing box provided at the lower part of the hinge pillar 71 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 arranged below the upper side frame 32 and below the upper side frame 32, and the upper arm support portion 312 of the front suspension support member 31 and the compartment portion 7. The hinge pillar 71 is connected.
Specifically, the first lower side frame 33 is an extruded member made of aluminum alloy that is formed by extrusion, and is formed in a substantially cylindrical body having a substantially rectangular closed cross section extending in a predetermined direction.

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

Further, as shown in FIGS. 1 and 2, the pair of left and right second lower side frames 34 includes a lower arm support portion 311 of the front suspension support member 31 and a vehicle compartment portion below the first lower side frame 33. 7 side sills 73 are connected.
Specifically, the second lower side frame 34 is an extruded member made of aluminum alloy that is formed by extrusion, and is formed in a substantially cylindrical body having a substantially rectangular closed section extending 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 a front end, the front end is joined to the rear surface of the lower arm support portion 311, and is located on the outer side in the vehicle width direction with respect to the front end. The rear end is joined to a torque box member 93 connected to the side surface of the side sill 73 described later, thereby connecting 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 compartment portion 7. ing.

1 and 2, the pair of left and right upper center frames 35 are disposed between the upper side frame 32 and the first lower side frame 33, the upper arm support portion 312 of the front suspension support member 31, and the vehicle. The dash panel 78 of the chamber 7 is connected.
Specifically, the upper center frame 35 is an extruded member made of aluminum alloy that is formed by extrusion, and has a substantially cylindrical shape in which a closed cross section having a partition portion that divides the internal space in the vehicle vertical direction extends in a predetermined direction. Formed in the body.

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

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

  On the other hand, as shown in FIG. 2, the upper center frame 35 of the vehicle 1 is positioned so that the rear end is located in the vicinity of the position where the planar virtual straight line L <b> 1 and the dash panel 78 intersect in 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 disposed so as to be positioned in the vicinity of the upper end of the dash panel 78 in the vehicle compartment portion 7 in a side view.
As shown in FIGS. 1 and 2, the upper center frame 35 disposed in this way is joined to the rear surface of the upper arm support portion 312 and the rear end is integrally provided on the dash panel 78 as shown in FIGS. 1 and 2. By joining 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 aluminum alloy that is formed by extrusion, and is formed in a substantially cylindrical body having a substantially rectangular closed section extending in a predetermined direction.

As shown in FIGS. 1 and 3, the lower center frame 36 is disposed on the front vehicle body 3 of the vehicle 1 so that one end in a predetermined direction is a front end and the rear end is located on the inner side in the vehicle width direction with respect to the front end. Is arranged.
More specifically, the lower center frame 36 is disposed along an imaginary straight line (not shown) connecting the lower arm support portion 311 and a substantially center in the vehicle front-rear direction in the floor tunnel 82 of the vehicle compartment portion 7 to be described later.

  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 cloth 37 near the lower arm support portion 311 and whose rear end is connected to the front end of the tunnel side frame 88. The lower arm support part 311 of the front suspension support member 31 and the tunnel side frame 88 are connected by being fastened and fixed to the connecting member 12 made of cast.

  On the other hand, as described above, the compartment portion 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 compartment upper side frames, a front header, A roof reinforcement, a rear header, a dash panel 78, a cowl box 79, a rear wall 80, a vehicle interior first cross member 81, a floor tunnel 82, and a pair of left and right vehicle interior second cross members 83; And 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. .

  As shown in FIG. 2, the pair of left and right hinge pillars 71 are disposed on the outer side in the vehicle width direction and on the rear side 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 aluminum alloy that is formed by extrusion, and is formed in a substantially cylindrical body having a substantially rectangular closed section extending in a predetermined direction.

As shown in FIG. 1, the hinge pillar 71 is disposed in the compartment portion 7 of the vehicle 1 such that one end in a predetermined direction is a 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 of a connecting member 11 made of an aluminum alloy to which the rear end of the upper side frame 32 and the front end of the vehicle upper side frame are joined. A substantially box-shaped collision load absorption box upper portion 90 that absorbs a collision load from the front of the vehicle is joined to the lower front surface.

  As shown in FIG. 3, the collision load absorption box upper portion 90 includes a collision load absorption box lower portion 91 formed by extending a side sill 73 described later to the front of the vehicle, and a sectional shape in a longitudinal section along the vehicle width direction. 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 disposed at a position spaced apart from the hinge pillar 71 at the rear of the vehicle, and at the opening of a side door (not shown) of the vehicle 1. It has a trailing edge. The center pillar 72 has a lower end joined to the rear end of the side sill 73 and an upper end connected to the vehicle interior upper side frame at a position slightly behind the rear end of the side sill 73.

  Specifically, the center pillar 72 includes a pillar lower portion extending from the lower end joined to the rear end of the side sill 73 toward the upper side of the vehicle and slightly toward the rear of the vehicle, and a vehicle compartment first cross member 81 described later. Further, the upper portion of the pillar extends from the position above the vehicle to the upper side of the vehicle and is connected to the upper frame of the passenger compartment.

  The center pillar 72 is not shown in detail, but an aluminum alloy pillar outer panel and an aluminum alloy pillar inner panel 72a (see FIG. 1) are joined in the vehicle width direction, and are aligned along the vehicle longitudinal direction. The cross-sectional shape in the horizontal cross-section is formed into an open cross-sectional shape with an opening at the rear of the vehicle.

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 vehicle front-rear direction.
Specifically, the side sill 73 is an extruded member made of an aluminum alloy that is formed by extrusion, and is formed in a substantially cylindrical body that has a closed cross section divided into a plurality of sections extending in the vehicle front-rear direction.

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

The pair of left and right passenger compartment upper side frames, although not shown in detail, connect the upper end of the hinge pillar 71 and the rear pillar (not shown) of the rear vehicle body 5 through the upper portion of the passenger compartment 7. ing.
Specifically, the passenger compartment upper side frame is an extruded member made of aluminum alloy that is formed by extrusion, and includes a portion corresponding to the front pillar in the vehicle 1 and a portion corresponding to the roof side rail in the vehicle 1. It is formed in an integrally formed shape.

  Further, although the front header is not shown in detail, the front ends of the portions corresponding to the roof side rails in the passenger compartment upper side frame are connected in the vehicle width direction. The front header has a cross-sectional shape in a longitudinal section along the vehicle front-rear direction, and is configured such that an upper panel having a substantially hat-shaped cross section and a lower panel having a substantially hat-shaped cross section are joined in the vehicle vertical direction to form a closed section. .

  In addition, although the roof reinforcement is not shown in detail, the center in the vehicle front-rear direction is connected in the vehicle width direction at a portion corresponding to the roof side rail in the vehicle upper side frame. In this roof reinforcement, an aluminum alloy upper panel and an aluminum alloy lower panel are joined in the vehicle vertical direction, and the cross-sectional shape in the longitudinal section along the vehicle front-rear direction forms a closed cross section with a substantially rectangular cross section. It is configured as follows.

  Further, the rear header is connected in the vehicle width direction near the boundary between the rear pillar and the vehicle compartment upper side frame, although not shown in detail. This rear header is constructed such that an aluminum alloy upper panel and an aluminum alloy lower panel are joined in the vehicle vertical direction, and the cross-sectional shape in the longitudinal section along the vehicle longitudinal direction forms a closed cross section with a substantially rhombic cross section. ing.

Further, as shown in FIG. 4, the dash panel 78 is a partition member made of an aluminum alloy that forms a front wall that separates the space of the vehicle compartment portion 7 and the space in front of the vehicle from the vehicle compartment portion 7. It is formed in the shape which connects the range of the vehicle up-and-down direction from the upper end of this to the lower end of the side sill 73 in the vehicle width direction.
Further, the dash panel 78 is formed in a substantially gate-like shape when viewed from the front so that the lower side of the vehicle is open at the bottom of the vehicle so as to be continuous with a floor tunnel 82 described later.

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

Although not shown in detail in the gusset member 92, an opening through which the first lower side frame 33 joined to the side surface of the collision load absorbing box upper portion 90 is formed. 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.

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

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

  The pair of left and right front frame connecting members 94 are made of aluminum die-casting, and are joined to the upper portion of the dash panel 78 and the cowl box 79 as shown in FIG. 5, together with the dash panel 78 and the cowl box 79. It is formed in a shape that forms a part of the front wall of the compartment 7.

  As shown in FIG. 5, the front frame connecting member 94 has a lower section 94 a formed in a cross-sectional shape along the dash panel 78 and a front surface of the cowl outer panel 792 in a longitudinal section along the vehicle longitudinal direction. In addition, an upper portion 94b extending upward from the upper end of the lower portion 94a, a bottom forming portion 94c extending rearward from the lower end of the upper portion 94b so as to form a bottom portion of the cowl box 79, and the upper center frame 35 A front-side 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 a front end of a tunnel upper frame 89 to be described later extend from the rear surface of the lower portion 94a to the rear of the vehicle. The rear side fitting portion 94e is integrally formed.

The front fitting portion 94d and the rear fitting portion 94e of the front frame connecting member 94 are formed to face each other in the vehicle front-rear direction.
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 80 connects the left and right center pillars 72, and also connects an aluminum first cross member 81 described later and an automotive fourth cross member 85 described later. This is a panel member made of a vehicle, and forms a partition behind the vehicle in the compartment 7.
The rear wall 80 is formed in a substantially gate-like shape when viewed from the front so that the lower end in the vicinity of the center in the vehicle width direction is continuous with a floor tunnel 82 described later, like the dash panel 78. Has been.

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

  Specifically, as shown in FIG. 4, the vehicle compartment first cross member 81 includes an aluminum alloy upper panel 811 that forms a front surface and an upper surface of the vehicle interior first cross member 81, and a vehicle lower side with respect to the upper panel 811. And the aluminum alloy lower panel 812 that forms the lower surface and the rear surface of the first cross member 81 of the vehicle compartment, and the cross-sectional shape in the longitudinal section along the vehicle longitudinal direction forms a closed section. Yes.

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 approximately the center in the vehicle width direction in the passenger compartment 7.
Specifically, as shown in FIGS. 6 and 7, the floor tunnel 82 includes 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 longitudinal cross section along the direction is configured to be a substantially gate-shaped cross section. The pair of left and right side wall panels 821 and the top panel 822 in the floor tunnel 82 are formed of a panel member made of an aluminum alloy.

  As shown in FIGS. 7 and 8, the side wall panel 821 has a substantially flat plate-like cross-sectional shape with a thickness in the vehicle width direction, and a lower end of the tunnel side frame 88 described later. Of being joined. The side wall panel 821 is formed with a length in the vehicle vertical direction that protrudes upward from the upper surface of the upper surface panel 822 (upper surface portion 822c described later).

  The portion of the side wall panel 821 that protrudes above the upper surface panel 822 sandwiches the tunnel upper frame 89 (to be described later in the vicinity of the rear end of the frame front portion 891 and the frame rear portion 892). The frame 89 is joined to the outer side surface portion 89d.

  As shown in FIGS. 6 to 8, the top panel 822 has a cross-sectional shape in a longitudinal section along the vehicle width direction, which is a substantially gate-shaped section with an opening at the vehicle lower side, and an inner side in the vehicle width direction on the side wall panel 821. The left and right joint surface portions 822a joined to the surface, the left and right slope surface portions 822b (see FIG. 8) tilted inward in the vehicle width direction from the upper end of the joint surface portion 822a, and the upper end of the slope surface portion 822b The upper surface portion 822c that is the upper surface of the floor tunnel 82 is integrally formed so as to be connected in the direction.

As shown in FIGS. 6 to 8, the inclined surface portion 822 b is formed so as to increase in width from the front of the vehicle toward the rear of the vehicle.
As shown in FIGS. 6 to 8, the upper surface portion 822 c has a concave portion projecting downward in the vehicle downward direction from the front of the vehicle toward the rear of the vehicle, as shown in FIGS. 6 to 8. A groove-shaped groove portion 822d is formed along the vehicle front-rear direction.

  Further, as shown in FIGS. 2 and 6, the floor tunnel 82 is disposed between a vehicle compartment third cross member 84 and a vehicle compartment fourth cross member 85, which will be described later, and a seat rail (not shown). The seat rail mounting member 95 to which (not shown) is coupled 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 vehicle compartment second cross member 83 is formed by joining an aluminum alloy upper panel and an aluminum alloy lower panel so that the cross-sectional shape in the longitudinal section along the vehicle longitudinal direction forms a closed cross section having a substantially rectangular cross section. Has been.
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 vehicle interior second cross member 83 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 in the vehicle longitudinal direction approximately in the center of the passenger compartment 7. ing.
Specifically, the casing third cross member 84 is an extruded member made of extruded aluminum alloy, and is formed in a substantially cylindrical body having a substantially trapezoidal closed cross section extending in the vehicle width direction. .

Further, a side frame connecting member 882 to which the side frame front portion 881 of the tunnel side frame 88 and the side frame rear portion 883 are connected is joined to the lower surface of the vehicle interior third cross member 84 in the vehicle width direction. .
A steering wheel S that is operated by an occupant is disposed above the third cross member 84 in the passenger compartment. In the vicinity of the steering wheel S, a leg portion of an occupant seated on the driver's seat 87, particularly the knee periphery is located.

  Further, as shown in FIGS. 2 to 4, the pair of left and right vehicle interior 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 vehicle compartment fourth cross member 85 is formed by joining an aluminum alloy upper panel and an aluminum alloy lower panel so that the cross-sectional shape in a longitudinal section along the vehicle longitudinal direction forms a closed cross section having a substantially rectangular cross section. Has been.

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

Further, as shown in FIG. 3, the pair of left and right tunnel side frames 88 are disposed along both ends of the floor tunnel 82 in the vehicle width direction when viewed from the bottom.
Specifically, as shown in FIG. 3, the tunnel side frame 88 includes a side frame front portion 881 extending in the vehicle front-rear direction in a range from the front end of the floor tunnel 82 to the vehicle interior third cross member 84 in the bottom view. , A side frame connecting member 882 made of aluminum die-casting joined in the vicinity of the inner end in the vehicle width direction of the vehicle interior third cross member 84, and a range extending from the vehicle interior third cross member 84 to the rear end of the floor tunnel 82. And a side frame rear portion 883 extending in the vehicle front-rear direction.

The side frame front portion 881 is an extruded member made of an aluminum alloy, and is formed in a substantially cylindrical body having a substantially rectangular closed section extending in a predetermined direction. As shown in FIG. 3, the side frame front portion 881 has a rear end located on the inner side 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 a front end. In the state, it is disposed in the compartment 7 of the vehicle 1.
As shown in FIG. 3, the front end of the side frame 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 side frame rear portion 883 is formed by joining an aluminum alloy upper panel 883 a and an aluminum alloy lower panel 883 b so that the cross-sectional shape in the longitudinal section along the vehicle width direction is substantially rectangular in cross section. It is formed to have a closed cross section. As shown in FIG. 3, the side frame rear portion 883 has a front end joined to the side frame connecting member 882 and a rear end 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 from the front end joined to the front frame connecting member 94 downward in the rearward direction of the vehicle and then extend toward the rear of the vehicle in a side view. It is installed.
Further, as shown in FIG. 2, the pair of left and right tunnel upper frames 89 extend from the front end joined to the front frame connecting member 94 to the vehicle width direction inner side and the vehicle rear side in the plan view. The tunnel 82 is formed in a shape extending toward the rear of the vehicle above the vehicle.

As shown in FIGS. 1 and 2, the left and right tunnel upper frames 89 are arranged at approximately the center in the vehicle width direction in the vehicle compartment portion 7 and the upper center frame 35 of the front vehicle body 3 and the vehicle compartment first cross member 81. Are connected in the vehicle longitudinal direction.
Specifically, the tunnel upper frame 89 is an extruded member made of an aluminum alloy that is extruded, and has a closed cross section having a substantially rectangular cross section in which a corner portion on the outer side in the vehicle width direction and the upper side of the vehicle is chamfered in a predetermined direction. It is formed in the extended substantially cylindrical body.

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

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

As shown in FIGS. 7 and 8, the inner side surface portion 89c has an end portion on the inner side in the vehicle width direction on the lower surface portion 89a and an end portion on the inner side in the vehicle width direction on the upper surface portion 89b in the longitudinal section along the vehicle width direction. It is formed in the substantially flat cross-sectional shape which connects a part to a substantially perpendicular | vertical.
As shown in FIGS. 7 and 8, the outer side surface portion 89d has a longitudinal section along the vehicle width direction, and the lower surface portion 89a is located on the vehicle upper side 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 89 e extends from the upper end of the outer side surface portion 89 d toward the vehicle upper side and the vehicle width direction inner side in the longitudinal section along the vehicle width direction, The tip is formed in a substantially flat cross-sectional shape connected to the outer end of the upper surface 89b in the vehicle width direction.
The left and right tunnel upper frames 89 are formed such that the vehicle width direction length of the cross-sectional shape in the longitudinal section along the vehicle width direction is less than or equal to half the vehicle width direction length in the vicinity of the upper portion of the floor tunnel 82. ing.

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

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

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

  Specifically, as shown in FIGS. 1 and 4, in the state where the driver's seat 87 is positioned at the most rearward slide position, the position of the seat surface portion 87a of the driver's seat 87 is approximately the center in the vehicle front-rear direction. The position of the upper surface portion 822c of the floor tunnel 82 at the position in the vehicle front-rear direction substantially the same as the seat center is defined as a 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 on the driver's seat 87, particularly the elbow portion, in the vehicle longitudinal direction. Note that the second predetermined position P2 is set at a position slightly above the vehicle relative to the upper surface portion 822c.

Then, in a side view, a virtual line connecting the rear fitting portion 94e of the front frame connecting member 94 and the second predetermined position P2 is a side view virtual straight line L2.
On the other hand, as shown in FIG. 1 and FIG. 4, the frame front portion 891 is extended from the front end toward the vehicle rear downward along 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 into a shape. As shown in FIGS. 2 and 8, in the frame rear portion 892, the inner side surface portion 89 c is joined to the inner side surface portion 89 c in the other frame rear portion 892.

  Further, as shown in FIGS. 1 and 4, the frame rear portion 892 extends in the vehicle rearward downward direction along the side view imaginary straight line L2 so as to be continuous from the frame front portion 891 in the side view. Is extended toward the rear of the vehicle near the predetermined position P2.

That is, as shown in FIG. 8, the rear portion 892 of the frame has a vehicle front portion separated from the upper surface portion 822c of the floor tunnel 82 above the second predetermined position P2, and the second predetermined position P2 The rear portion of the vehicle is placed on the upper surface portion 822 c of the floor tunnel 82.
A portion of the frame rear portion 892 behind 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 part of the frame front part 891 that is separated in the vehicle width direction. A reinforcing member 96 is joined.

  As shown in FIGS. 6 and 7, the reinforcing member 96 includes a reinforcing main body portion 96 a having a substantially inverted gate shape in cross section along the vehicle width direction, and an upper end of the reinforcing main body portion 96 a. 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 in the longitudinal section along the longitudinal direction of the vehicle, 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 reinforcing main body portion 96 a has a length in the vehicle width direction that decreases in the plan view from the front of the vehicle toward the rear of the vehicle corresponding to the distance between the left and right frame front portions 891. It is formed as follows.
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 96 b 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 in the vehicle longitudinal direction along the floor tunnel 82 in the vehicle interior of the vehicle 1. The vehicle body structure of the vehicle 1 provided includes a pair of left and right sides that extend rearward from the front end connected to the front suspension support member 31 in the vehicle width direction and toward the vehicle width direction outer side than the floor tunnel 82 in a plan view. An upper center frame 35 is provided, and the tunnel upper frame 89 extends in the vehicle width direction from the front end connected to the rear end of the upper center frame 35 in the plan view and toward the rear of the vehicle toward the upper surface portion 822c of the floor tunnel 82. The frame front 891 and the floor tunnel 82 from the rear end of the frame front 891 in a plan view. The vehicle body rigidity of the vehicle 1 can be improved and the driver's seat 87 is desired by being integrally formed with the frame rear portion 892 that extends rearward along the surface portion 822c and is close to or connected to the other tunnel upper frame 89. Can be arranged in 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 frame rear portion 892 of the tunnel upper frame 89 is close to or connected to the other tunnel upper frame 89 in the vehicle interior, the vehicle body structure of the vehicle 1 is a vehicle in which the left and right frame rear portions 892 are combined in a plan view. The length in the width direction can be kept short.

Thus, the vehicle body structure of the vehicle 1 can suppress the space above the vehicle from the seat surface portion 87 a of the driver seat 87 from being pressed by the tunnel upper frame 89. For this reason, the vehicle body structure of the vehicle 1 can arrange | position the driver's seat 87 in which a passenger | crew seats inside the vehicle width direction inside a vehicle interior.
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, the left and right upper center frames 35 extend substantially linearly in a planar view along a planar virtual line L1 connecting the front suspension support member 31 and the first predetermined position P1 in the upper surface portion 822c of the floor tunnel 82 in a planar view. The frame front portion 891 of the tunnel upper frame 89 is formed in a shape extending substantially linearly along the plan view virtual straight line L1 in plan view, and the first predetermined position P1 is in plan view. By setting the vehicle front-rear direction substantially the same as the position of the steering wheel S in the vehicle front-rear direction, the vehicle body structure of the vehicle 1 can dispose the driver seat 87 at a desired position, and without impairing load transmission efficiency. The vehicle body rigidity of 1 can be improved stably.

  Specifically, the frame front portion 891 of the tunnel upper frame 89 is formed in a shape extending toward the upper surface portion 822c of the floor tunnel 82 at a position in the vehicle longitudinal direction substantially the same as the position of the steering wheel S in the vehicle longitudinal direction. As a result, the vehicle body structure of the vehicle 1 is such that the occupant's arm portion located behind the steering wheel S and the occupant's knee vicinity located near the steering wheel S are located at the front end outward in the vehicle width direction with respect to the rear end. It is possible to prevent contact with the positioned frame front portion 891. For this reason, the vehicle body structure of the vehicle 1 can arrange | position the driver's seat 87 inside 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 plan view, the vehicle body structure of the vehicle 1 has the tunnel upper frame 89 in plan view. The relative angle between the frame front portion 891 and the upper center frame 35 can be made as small as possible.

  In addition, the vehicle body structure of the vehicle 1 is such that, for example, the first predetermined position P1 is positioned further to the rear of the vehicle than when the position in front of the steering wheel S is set to the first predetermined position P1. Therefore, the relative angle between the frame front portion 891 and the frame rear portion 892 can be further reduced.

As a result, the vehicle body structure of the vehicle 1 suppresses a decrease in load transmission efficiency in the range from the upper center frame 35 to the frame rear portion 892 of the tunnel upper frame 89, and at the front of the frame, which is a bent portion of the tunnel upper frame 89 in plan view. The vicinity of the boundary between the portion 891 and the frame rear portion 892 can be prevented from becoming a stress concentration site.
Therefore, the vehicle body structure of the vehicle 1 can dispose the driver's seat 87 at a desired position, and can stably improve the vehicle body rigidity of the vehicle 1 without impairing the load transmission efficiency.

Further, since the tunnel upper frame 89 is constituted by an internal hollow extrusion member formed by extrusion molding, the vehicle body structure of the vehicle 1 is obtained when the frame front portion 891 and the frame rear portion 892 are configured separately. In comparison, an increase in the number of parts can be suppressed, and a decrease in load transmission efficiency between the frame front portion 891 and the frame rear portion 892 can be suppressed.
Therefore, the vehicle body structure of the vehicle 1 can further improve the vehicle body rigidity of the vehicle 1 without further impairing the load transmission efficiency by the left and right tunnel upper frames 89 formed of push members.

  In addition, since the frame rear portion 892 of the tunnel upper frame 89 is joined to the frame rear portion 892 of the other tunnel upper frame 89, the vehicle body structure of the vehicle 1 has a load transmitted from the frame front portion 891 of the tunnel upper frame 89. Can be distributed and transmitted to a frame rear portion 892 continuous from the frame front portion 891 and a frame rear portion 892 in the other tunnel upper frame 89.

As a result, the vehicle body structure of the vehicle 1 can more reliably prevent the vicinity of the boundary between the frame front portion 891 and the frame rear portion 892 from becoming a stress concentration portion, and can improve load transmission efficiency in the pair of left and right tunnel upper frames 89. It can improve more reliably.
Therefore, the vehicle body structure of the vehicle 1 can improve the load transmission efficiency and the vehicle body rigidity of the vehicle 1 more reliably by the frame rear portions 892 joined to each other.

  Further, the vehicle body structure of the vehicle 1 is a frame that is separated in the vehicle width direction in a plan view by providing a reinforcing member 96 that connects and reinforces the vicinity of the rear end of the frame front portion 891 in the tunnel upper frame 89. The vicinity of the rear end of the front portion 891 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 end of the frame front portion 891.

  For this reason, the vehicle body structure of the vehicle 1 suppresses a sudden change in rigidity from the frame front part 891 to the frame rear part 892, and the vicinity of the boundary between the frame front part 891 and the frame rear part 892 is a stress concentration part. It can be prevented more reliably.

Further, for example, when a load is input to the left and right frame front portions 891 at different timings, the vehicle body structure of the vehicle 1 causes the rear ends of the left and right frame front portions 891 to be displaced in different directions by the reinforcing member 96. Can be suppressed.
At this time, even when the frame rear portions 892 are not joined to each other, the vehicle body structure of the vehicle 1 transmits the load acting on one tunnel upper frame 89 to the other tunnel upper frame 89 via the reinforcing member 96. can do.

Thereby, the vehicle body structure of the vehicle 1 can suppress torsional deformation of the pair of left and right tunnel upper frames 89 and can efficiently transmit loads input at different timings to the frame rear portion 892.
Therefore, the vehicle body structure of the vehicle 1 can further improve load transmission efficiency and further improve the vehicle body rigidity of the vehicle 1 by the reinforcing member 96 that connects and reinforces the vicinity of the rear end of the frame front portion 891.

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

In 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,
The tunnel frame corresponds to the tunnel upper frame 89,
The body frame corresponds to the upper center frame 35,
The predetermined position corresponds to the first predetermined position P1,
The virtual straight line corresponds to the planar virtual straight line L1,
The present invention is not limited only 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. However, the present invention is not limited to this, and the frame rear portion 892 is connected by a connecting member that connects in the vehicle width direction. Also good.
Alternatively, for example, a configuration may be adopted in which a frame rear portion 892 that is adjacent to each other by providing a gap that slightly considers molding variation in the vehicle width direction is joined to the upper surface portion 822c of the floor tunnel 82.

  Further, although the frame front portion 891 of the tunnel upper frame 89 is connected and reinforced by the reinforcing member 96 having a cross-sectional shape in the longitudinal cross section along the vehicle width direction, which is substantially inverted, the cross-sectional shape is not limited to this. As shown in FIG. 12, which shows a cross-sectional view of the reinforcing member, a reinforcing member 97 composed of a pair of upper and lower flat plate members respectively connecting the upper surface portion 89b and the lower surface portion 89a of the frame front portion 891 separated in the vehicle width direction. Also good.

  Alternatively, the rear portion of the frame front portion 891 separated in the vehicle width direction is connected and reinforced by the reinforcing member having a substantially inverted portal shape in cross section and the substantially flat plate member connecting the upper surface portion 89b of the frame front portion 891. You may comprise the reinforcing member to perform.

DESCRIPTION OF SYMBOLS 1 ... Vehicle 2 ... Front suspension 31 ... Front suspension support member 35 ... Upper center frame 82 ... Floor tunnel 89 ... Tunnel upper frame 96 ... Reinforcement member 97 ... Reinforcement member 822c ... Upper surface part 891 ... Frame front part 892 ... Frame rear part L1 ... Plane view virtual straight line P1... First predetermined position S... Steering wheel

Claims (5)

A pair of left and right suspension support members for supporting the front suspension of the vehicle;
A vehicle body structure including a pair of left and right tunnel frames extending in a vehicle front-rear direction along a floor tunnel in a vehicle interior,
In plan view, from a front end connected to the suspension support member, a pair of left and right vehicle body skeleton frames extending in the vehicle width direction and rearward of the vehicle in the vehicle width direction than the floor tunnel,
The tunnel frame is
In plan view, the front part of the frame extending from the front end connected to the rear end of the vehicle body skeleton frame in the vehicle width direction and toward the rear of the vehicle toward the upper surface of the floor tunnel;
In a plan view, a vehicle body structure of a vehicle that extends rearward from the rear end of the front portion of the frame along the upper surface of the floor tunnel and is integrally formed with a rear portion of the frame that is close to or connected to the other tunnel frame. The left and right body skeleton frames
In plan view, the suspension support member is formed in a shape extending substantially linearly along a virtual straight line connecting a predetermined position on the upper surface of the floor tunnel,
The frame front of the tunnel frame is
In plan view, it is formed in a shape extending substantially linearly along the virtual straight line,
The predetermined position is
2. The vehicle body structure according to claim 1, wherein the vehicle body structure is substantially the same position in the vehicle front-rear direction as the position of the steering wheel in the vehicle front-rear direction in plan view. The tunnel frame is
The vehicle body structure of a vehicle according to claim 1 or 2, wherein the vehicle body structure is constituted by an internal hollow extrusion member formed by extrusion molding. The frame rear part of the tunnel frame is
The vehicle body structure according to any one of claims 1 to 3, wherein the vehicle body structure is joined to a rear portion of the frame in the other tunnel frame. The vehicle body structure according to any one of claims 1 to 4, further comprising a reinforcing member that connects and reinforces the vicinity of a rear end of the front portion of the tunnel frame.

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