JP4348983B2 - Front body structure of automobile - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a front vehicle body structure of an automobile, and more particularly to a front vehicle body structure that prevents a dash panel from retreating during a frontal collision.
[0002]
[Prior art]
  As a front body structure of a conventional automobile, one shown in FIG. 8 is known.
[0003]
  In this case, a pair of front side frames 104 spaced in the vehicle width direction extend from the vehicle exterior side surface of the dash panel 103 that partitions the vehicle compartment 101 and the engine compartment 102 located in front of the vehicle compartment 101 to the front of the vehicle. A floor frame 106 extends rearward from the dash panel 103 along the floor portion 105 of the chamber 101, and includes a kick-up portion 107 that connects the rear end of the front side frame 104 and the front end of the floor frame 106. .
[0004]
  Then, when the automobile collides with the front, the load transmitted from the front side frame 104 to the vehicle compartment front is transmitted to the floor frame 106 via the kick-up unit 107, thereby increasing the rigidity of the vehicle compartment front. By providing the front side frame 104 with a shock absorbing part 108 that is more fragile than the front part of the passenger compartment, the front side frame compresses and deforms in the longitudinal direction of the vehicle to absorb the impact load, and the dash panel 103 and the like. It suppresses the deformation of the front part of the room and secures the occupant's living space.
Further, as the shock absorbing portion 108 is provided in a wider range in the vehicle front-rear direction of the front side frame 104, the compression deformation stroke becomes larger and the shock absorbing performance at the time of a frontal collision is improved, thereby suppressing the dash panel 103 from moving backward. Crew safety can be improved.
[0005]
  However, the front side frame 104 and the floor frame 106 are displaced in the vertical direction, and are coupled in a crank shape by a kick-up portion 107 that extends obliquely downward and rearward along the dash panel 103. The connecting portion between the rear end of the front side frame 104 and the upper end of the kick-up portion 107, and the connecting portion between the front end of the floor frame 106 and the lower end of the kick-up portion 107 are easily bent and deformed due to stress due to a load at the time of frontal collision. In this case, the load applied to the front side frame 104 cannot be received by the floor frame 106, and the front side frame 104 is retracted without being sufficiently compressed and deformed, and the dash panel 103 is retracted by receiving the load from the front side frame 104. Problem that increases There was.
[0006]
  As a conventional technique for solving this problem, a method is known in which a connecting portion between the upper end of the kick-up portion 107 and the rear end of the front side frame 104 is reinforced by providing a torque box 109 or the like in its closed cross section to increase rigidity. However, there is a problem in that the weight of the vehicle body increases in proportion to the degree of reinforcement simply by reinforcing the connecting portion.
[0007]
  As another conventional technique, there is a method of increasing the rigidity by increasing the thickness of the dash panel without reinforcing the joint portion between the rear end of the front side frame and the upper end of the kick-up portion. Since the load is received by the surface of the dash panel rather than being transmitted to the floor frame that extends linearly with respect to the load, there is a problem that the rigidity is relatively weak and the weight of the dash panel increases and the manufacturing cost increases. .
[0008]
  As another prior art, the following front body structure is known. This has a dash panel on the front part of the passenger compartment covering the front edge of the passenger compartment floor, the pillar and the cowl, and separating the passenger compartment from the engine room located in front of it. A pair of front side frames extending forward from the dash panel vehicle compartment outer surface, a kick-up portion extending downward from the rear end of the front side frame along the dash panel and the floor portion, and a lower end of the kick-up portion And a floor frame extending rearward of the vehicle along the floor portion.
[0009]
  A wheel house panel that bulges toward the vehicle interior is provided at the joint between the floor front edge, the pillar, and the dash panel, and between the floor frame and the pillar, the dash panel and the wheel house panel are provided. A reinforcing member is provided along the upper and lower sides of the dash panel and the wheel house panel.
[0010]
  In this case, since the floor frame of the dash panel and the pillar are connected by a reinforcing member, the load transmitted from the front side frame at the time of a frontal collision is distributed to the floor frame and the pillar, thereby improving the rigidity of the front part of the vehicle body. It is possible to prevent the dash panel from retreating by preventing bending deformation at the lower end of the kick-up portion.
[0011]
  However, since the reinforcing member is separated from the upper end of the kick-up portion, it is not possible to prevent bending deformation of the upper end of the kick-up portion at the time of a frontal collision. Although the reinforcing member extends from the floor frame diagonally upward in the vehicle width direction along the wheel house panel and the support direction is different from the deformation direction of the kick-up portion, the kick-up portion is bent and deformed. There is a problem in that the weight of the vehicle body also increases because the joint portion between the rear end of the front side frame and the upper end of the kick-up portion must be reinforced, which cannot be prevented efficiently.
[0012]
[Patent Document 1]
Japanese Patent Laid-Open No. 05-085419
[0013]
[Problems to be solved by the invention]
  The present invention has been made in view of such problems, and the problem is that the kick-up portion is bent and deformed in order to suppress the dash panel retreat during a frontal collision while suppressing an increase in weight and manufacturing cost. Is to prevent.
[0014]
[Means for Solving the Problems]
  The first configuration of the present invention is spanned between a floor portion of a passenger compartment, a pair of pillars extending vertically at both corners in the vehicle width direction of the front portion of the passenger compartment, and an upper portion of the pair of pillars. A cowl that is a rigid member, a dash panel provided so as to cover a portion surrounded by the front edge of the floor portion, the pillar, and the cowl, and a vehicle width from the outer side surface of the dash panel toward the front of the vehicle From a pair of front side frames extending away in the direction and the rear ends of the pair of front side frames,Outside the dash panelAlong the dash panel and the floorTo form a closed section with the dash panelA vehicle front body structure comprising a pair of kick-up portions extending downward and a pair of floor frames extending rearward from the lower ends of the pair of kick-up portions along the floor portion,A columnar reinforcing member having a substantially U-shaped cross section that opens rearward has an inclined portion that abuts the rear end of the upper surface of the front side frame and extends upwardly from the corresponding portion toward the cowl toward the rear of the vehicle. As described above, of the pair of kick-up parts, the vehicle-width direction driver seat side kick-up part side is located so as to extend vertically from a portion located inside the closed cross section to above the upper surface of the front side frame, and The part is provided with a support part that supports a booster that assists the brake pedal depression force.It is characterized by this.
[0015]
  According to this configuration, the load transmitted from the front side frame at the time of a frontal collision is transmitted to the floor frame by the kick-up portion and is also transmitted to the cowl by the reinforcing member and dispersed, so that the rigidity of the front portion of the passenger compartment is increased. Can do. In addition, since the vertical deformation of the kick-up part is effectively suppressed by the stretching of the reinforcing member extending in the vertical direction, the dash panel retreat due to the bending deformation of the kick-up part can be efficiently suppressed, and the reinforcing member is minimized. The vehicle body weight can be reduced because only limited reinforcement is required.
[0016]
  The second configuration of the present invention is the configuration 1,In the reinforcing member, a contact portion with the rear end of the upper surface of the front side frame is inclined more horizontally than a support portion of the booster.It is characterized by this.
[0017]
  According to a third configuration of the present invention, in the first or second configuration, the reinforcing member isThe dash panel extends from the portion spaced downward from the rear end of the upper surface of the front side frame to the lower rear side, and the dash panel extends from the portion corresponding to the rear end of the upper surface of the front side frame to the rear upper side. The front side frame is formed so as to bend and extend downward and rearward from a portion spaced below the rear end of the upper surface of the front side frame.It is characterized by this.
[0018]
  The fourth configuration of the present invention is the first configuration.To any one of the third configurationsIn the configuration ofThe support part is wider in the vehicle width direction than a part below the upper surface of the rear end of the front side frame of the reinforcing member.Is.
[0019]
According to a fifth configuration of the present invention, in the first configuration, the reinforcing member is coupled to the kick-up portion and the dash panel, so that the cowl and the A continuous cross section is formed between the floor frame and the floor frame.
[0020]
According to this configuration, the closed cross-section formed continuously between the cowl and the floor frame supports the front side frame from the rear at the time of a frontal collision, and the reinforcing member is arranged in the vehicle front-rear direction at the upper end of the kick-up portion. Compared with the case where it is connected to a plane perpendicular to the surface, the connection part is less likely to be peeled off by the load applied from the front side frame, and the load can be effectively distributed to the cowl and floor frame without increasing the weight of the vehicle body. Bending deformation of the upper and lower ends of the kick-up portion can be further suppressed.
[0021]
  No. of the present invention6The configuration of the first to the first5In any one of the configurations described above, a vehicle is provided along the dash panel from the upper end of the kick-up portion so as to connect the upper end of the kick-up portion and the pillar between the upper end of the kick-up portion and the pillar. Extends outward in the width directionOutsideA reinforcing member is provided.
[0022]
  According to this configuration, since the load transmitted from the front side frame to the kick-up portion at the time of a frontal collision can be distributed to the pillars, bending deformation of the kick-up portion can be further suppressed.
[0023]
  No. of the present invention7The configuration of the first6StructureFinallyThe upper end of the pair of kick-up portions extends substantially horizontally along the dash panel so as to connect the upper end of the pair of kick-up portions.InsideA reinforcing member is provided.
[0024]
  According to this configuration, even when the load is intensively transmitted from one front side frame to the corresponding kick-up portion due to, for example, an offset collision, the load can be distributed to the other kick-up portion. The dash panel can be prevented from moving backward.
[0025]
  No. of the present invention8The configuration of the first7In the configuration, a tunnel portion extending in the vehicle front-rear direction and having a convex section upward is provided at the lower portion of the dash panel and the center of the floor portion.InsideThe reinforcing member is connected by a connecting member.
[0026]
  According to this configuration, the frontGRhinoDoffThe load transmitted to the dash panel by the ram and the retreating engine or the like can be distributed to the tunnel portion, and the dash panel can be prevented from retreating.
[0027]
  No. of the present invention9The configuration of the first7Or the second8In the configuration ofOuter reinforcement member and inner reinforcement memberAre located on the interior side of the dash panel, respectively, andOuter reinforcement member and inner reinforcement memberBy connecting the facing ends of the dash panel, a continuous closed cross section spanned between the pair of pillars is formed on the interior side of the dash panel.
[0028]
  According to this configuration, the upper part of the kick-up part is supported from behind by a closed cross section, and the impact load at the time of frontal collision is received and distributed with high support rigidity without reinforcing the connection part with the upper part of the kick-up part. Since the rigidity of the kick-up portion can be increased, it is possible to eliminate the reinforcement of the connecting portion between the rear end of the front side frame and the upper end of the kick-up portion, and the structure of the front portion of the passenger compartment can be reinforced without increasing the vehicle body weight.
[0029]
  No. of the present invention10The configuration of the first to the first9The reinforcing member is provided corresponding to the kick-up portion on the driver's seat side in the vehicle width direction, while the kick-up portion on the passenger seat side includes the kick-up portion. To the middle in the vertical direction between the kick-up portion and the cowl and not connected to the cowlKick-up clubA reinforcing member is provided.
[0030]
  According to this configuration, there is a pedal for operating the vehicle, and the rigidity of the front part of the passenger compartment on the driver's seat side where the allowance for backward movement of the dash panel is small can be emphasized. The front passenger compartment has a relatively large impact load at the time of frontal collision,Kick-up clubBy distributing the load over a wide area of the kick-up part and the dash panel by the reinforcing member, the rigidity can be appropriately improved while suppressing an increase in the weight of the vehicle body..
[0031]
BookFirst of the claimed invention1The configuration of the first to the first0In any one of the configurations described above, a frontal collision flow near the dash panel of the front side frame.NAn impact absorbing portion that is deformed with a smaller load than the dash panel when receiving an impact load applied to the inside frame is provided.
[0032]
  According to this configuration, the dash panel near the front side frame, which no longer needs reinforcement, can be actively compressed and deformed at the time of a frontal collision, so the impact load on the front side frame can be increased by increasing the compression deformation stroke of the front side frame. As a result, the dash panel can be prevented from moving backward without increasing the weight of the vehicle body.
[0033]
【The invention's effect】
  As described above, according to the present invention, the kick-up portion is reinforced to prevent bending deformation at the time of a frontal collision, thereby suppressing the dash panel retreat, and the front side frame rear end and the kick-up portion upper end. It is possible to provide a front vehicle body structure of an automobile that can reduce the weight of the vehicle body without reinforcing the connection portion.
[0034]
DETAILED DESCRIPTION OF THE INVENTION
  Embodiments of the present invention will be described below with reference to the drawings.
[0035]
  1 is a perspective view of a front vehicle body structure according to an embodiment of the present invention as viewed from the front of the vehicle body, FIG. 2 is a perspective view of the vehicle body side, and FIG. 3 is an arrangement of reinforcing members in FIG. It is explanatory drawing explaining these.
[0036]
  4 is an exploded perspective view for explaining the reinforcing member, FIG. 5 is a sectional view taken along line AA in FIG. 1, and FIG. 6 is a sectional view taken along line BB in FIG. .
[0037]
  As shown in FIG. 1 to FIG. 6, an automobile 1 to which the present invention is applied includes a passenger compartment 2 in which an occupant rides, and an engine compartment 3 in which a driving device such as an engine 50 is housed in a front portion. A floor portion 4 is provided on the lower surface, and a pair of hinge pillars 5 that support a side door of a vehicle (not shown) via hinges are extended in the vertical direction at both corners in the front vehicle width direction of the passenger compartment 2. In addition, a cowl 6 having a closed cross-sectional structure extending in the vehicle width direction is bridged between the upper portions of the hinge pillars 5, and a portion surrounded by the floor portion 4, the pair of hinge pillars 5, and the cowl 6 A dash panel 7 that partitions the engine room 3 and the vehicle compartment 2 is provided.
[0038]
  A pair of front side frames 8 spaced in the vehicle width direction are provided from the vehicle interior side surface of the dash panel 7 to the front of the vehicle, and from the rear end of the front side frame 8,Outside the passenger compartment of the dash panel 7Along the dash panel 7 and the floor part 4,To form a closed section with the dash panel 7A kick-up portion 9 is extended downward.The dash panel 7 extends rearward and upward from a portion corresponding to the upper rear end of the front side frame 8 in the vertical direction, and bends downward and rearward from a portion spaced below the rear upper end of the front side frame 8. It is formed to extend.
[0039]
  At the lower end of the kick-up portion 9, a floor frame 10 that forms a closed section is extended in the vehicle front-rear direction by the lower surface of the floor portion 4.
[0040]
  Further, side sills 11 having a closed cross-sectional structure extending in the vehicle front-rear direction are provided on both side edges in the vehicle width direction of the floor portion 4, and the front end of the side sill 11 and the lower end of the kick-up portion 9 are separated by a torque box 12. It is connected.
[0041]
  As shown in FIGS. 1 and 3 to 5, a closed cross-sectional structure is provided between the kick-up portion 9 and the cowl 6 on the driver seat side dash panel 7 on the left side in FIG. The reinforcing member 13 is provided.
[0042]
  The reinforcing member 13 is composed of an upper member 13a and a lower member 13b that are connected to each other, and each has a U-shaped cross section that extends in the vertical direction with the dash panel 7 side open, and is provided at the open end. A closed cross section is formed by joining the flange to the dash panel 7.The reinforcing member 13 extends upward from the upper surface of the front side frame 8, and extends and bends rearward and downward from a portion spaced below the rear end of the upper surface of the front side frame 8.
[0043]
  According to this structure, the load transmitted from the front side frame 8 at the time of a frontal collision is transmitted to the floor frame 10 by the kick-up portion 9, and the reinforcing member13Therefore, the rigidity of the front part of the passenger compartment can be increased. Further, since the vertical deformation of the kick-up portion 9 is effectively suppressed by the stretching of the reinforcing member 13 extending in the vertical direction, the connection portion between the rear end of the front side frame 8 and the upper end of the kick-up portion 9 is reinforced. Even without this, the retraction of the dash panel 7 due to the bending deformation of the kick-up portion 9 can be efficiently suppressed, and the reinforcing member13Can reduce the weight of the car body with minimal reinforcement.
[0044]
  The upper member(Inclined part)13a isAbutting the rear end of the upper surface of the front side frame 8 and extending obliquely upward from the corresponding part toward the cowl 6 toward the rear side of the vehicle;Its upper end is joined to the underside of the cowl 6ing. That is, the upper member 13a isAlong the shape of the dash panel 7, it is inclined downward and extends toward the front of the vehicle.ing.On the other hand, the lower member 13b extends downward from the connecting portion with the upper member 13a, and is formed so as to close the inner surface of the closed section of the kick-up portion 9. And an arch-like continuous closed section protruding forward of the vehicle body with the lower member 13b as a vertex is formed between the cowl 6 and the floor frame 10.
[0045]
  According to this structure, the closed side surface continuously formed between the cowl 6 and the floor frame 10 supports the front side frame 8 from the rear at the time of a frontal collision, and the reinforcing member 13 is attached to the kick-up portion 9. Compared to the case where the upper end is connected to a plane parallel to the longitudinal direction of the vehicle, the connection portion is less likely to be peeled off by the load applied from the front side frame 8, and the closed section is an arch shape protruding forward of the vehicle body. Thus, the load at the time of the frontal collision can be effectively distributed to the cowl 6 and the floor frame 10, and the bending deformation of the upper and lower ends of the kick-up portion 9 can be further suppressed without increasing the vehicle body weight.
[0046]
  As shown in FIGS. 1, 2, 4, and 5, the reinforcing member 13 includes a pedal support bracket 17 that rotatably supports an accelerator pedal 14 that is a vehicle operation pedal, a brake pedal 15, and a clutch pedal 16. Is mounted on the vehicle interior side, and a booster 18 for assisting the pedaling force when the occupant depresses the brake pedal 15 is mounted on the vehicle exterior side.
[0047]
  Since the booster 18 is a well-known device that amplifies the braking force by using the intake negative pressure of the engine, a detailed description thereof will be omitted.
[0048]
  As shown in FIGS. 4 and 5, the dash panel 7 and the reinforcing member 13 are provided with an opening 19 that communicates between the vehicle compartment 2 and the engine room 3, and connects the brake pedal 15 and the booster 18. The rod 20 to be passed is passed.
[0049]
  A plurality of mounting holes 21 through which the bolts pass are provided around the opening 20, and a plurality of mounting holes 22 corresponding to the mounting holes 21 on the reinforcing member 13 side are also provided in the pedal support bracket. The pedal support bracket 17 and the booster device 18 are supported by the reinforcing member 13 by passing the bolt portions 18 a provided in the booster device 18 to these mounting holes 21 and 22. .The periphery of the attachment hole 21 of the reinforcing member 13 constitutes a support portion that supports the booster 18. The support portion is wider in the vehicle width direction than the portion below the rear end upper surface of the front side frame 8 of the reinforcing member 13. Further, the contact portion of the reinforcing member 13 with the rear end of the upper surface of the front side frame 8 is inclined more horizontally than the support portion of the booster 18.
[0050]
  According to this structure, the pedals 14, 15, 16 for operating the vehicle are arranged on the portion of the dash panel 7 that is relatively difficult to be deformed. The safety of the feet of hands can be increased.
[0051]
  In addition, since the reinforcing member 13 also serves as a support portion of the dash panel 7 that supports the booster 18 and the pedal support bracket 17, the pedals 14, 15 are added without reinforcing the weight by separately reinforcing the dash panel 7. , 16 support rigidity can be significantly increased.
[0052]
  In particular, even when an object in the engine room 3 such as the engine 50 moves backward and pushes the booster 18 rearward at the time of a frontal collision, the load applied to the dash panel 7 from the booster 18 via the reinforcing member 13 Since it can be distributed to the cowl 6 and the floor frame 10 and the partial retreat of the dash panel 7 due to the retraction of the booster 18 is suppressed, the retraction of the booster 18 is suppressed. The backward movement of the brake pedal 15 can be suppressed.
[0053]
  2 and 3, the first embodiment of the present application extends from the upper end of the kick-up portion 9 to the side wall of the dash panel 7 so as to connect the upper end of the kick-up portion 9 and the hinge pillar 5. The second reinforcing member extending substantially horizontally outward in the vehicle width direction(Outer reinforcement member)23, and this second reinforcing member23Is formed in a U shape whose cross section is open toward the dash panel 7, and a closed cross section is formed by connecting a flange provided at the open end to the dash panel 7.
[0054]
  With this structure, the impact load transmitted from the front side frame 8 at the time of a frontal collision is the second reinforcing member.23Is transmitted to the hinge pillar 5 and the load is more dispersed, and the front side frame 8 has a rear end at the reinforcing member.13And second reinforcing member23Therefore, the rigidity of the front part of the passenger compartment in the frontal collision can be remarkably improved.
[0055]
  Furthermore, in the first embodiment of the present application, between the upper ends of the pair of left and right kick-up portions 9, the upper ends of the kick-up portions 9 are connected so as to extend substantially horizontally along the side surface of the cabin of the dash panel 7. The passed third reinforcing member(Inner reinforcement member)24. The third reinforcing member 24 is formed in a U-shape opening toward the dash panel 7, and the second reinforcing member23Similarly, the dash panel7A closed cross section is formed.
[0056]
  With this structure, for example, even when the load is intensively transmitted from one front side frame 8 to the corresponding kick-up portion 9 due to an offset collision, the load can be distributed to the other kick-up portion 9, Further, the dash panel 7 can be prevented from moving backward.
[0057]
  In the present embodiment, a tunnel portion 25 is provided at the lower portion of the dash panel 7 and at the center of the floor portion 4 so as to extend in the vehicle front-rear direction and has a convex section upward. The portion 25 and the third reinforcing member 24 are connected by a connecting member 26.
  With this structure, the load transmitted to the dash panel 7 by the front side frame 8 and the retreating engine 50 or the like at the time of a frontal collision can be distributed to the tunnel portion 25, and the retreat of the dash panel 7 can be suppressed.
[0058]
  In the present embodiment, the second and third reinforcing members 23 and 24 are located on the interior side of the dash panel 7 and face the second and third reinforcing members 23 and 24, respectively. By connecting the end portions to be connected, a continuous closed cross-section spanned between the pair of pillars 5 is formed on the interior side of the dash panel 7.
[0059]
  According to this structure, the upper end of the kick-up portion 9 is supported from behind by the closed double section of the reinforcing member and the second and third reinforcing members, and the connecting portion with the upper portion of the kick-up portion 9 is supported. Even if it is not reinforced, the impact load at the time of frontal collision can be received and distributed with high support rigidity, and the rigidity of the kick-up part 9 is increased. The structure of the front part of the passenger compartment can be reinforced without increasing the weight of the vehicle body.
[0060]
  In the present embodiment, as shown in FIGS. 1, 3 and 6, the reinforcing member 13 is provided corresponding to the kick-up portion 9 on the driver's seat side in the vehicle width direction. The kick-up portion 9 on the side extends from the kick-up portion 9 to a middle position in the vertical direction between the kick-up portion 9 and the cowl 6, and is not connected to the cowl 6.(Kick-up part reinforcement member)27 is provided.
[0061]
  According to this structure, there are pedals 14, 15, and 16 for operating the vehicle, and the rigidity of the front part of the passenger compartment on the driver's seat side where the dash panel 7 has a small backward allowance can be emphasized, and there is no pedal. The front passenger compartment has a relatively large allowance for retraction of the dash panel 7, and the impact load at the time of frontal collision is distributed by the fourth reinforcing member 27 over a wide area between the kick-up portion 9 and the dash panel 7. As a result, the rigidity can be appropriately improved while suppressing an increase in the weight of the vehicle body.
[0062]
  Further, the fourth reinforcing member 27 is located outside the passenger compartment of the dash panel 7 and is coupled to the kick-up portion 9 and the dash panel 7 so that the fourth reinforcing member 27 is located outside the passenger compartment of the dash panel 7. A closed cross section that is continuous with the floor frame 10 is formed.
[0063]
  According to this structure, the load transmitted from the front side frame 8 to the kick-up portion 9 at the time of a frontal collision can be distributed and transmitted over a wide range of the floor frame 10 and the dash panel 7 while being supported from behind by the closed cross section. Bending deformation of the upper end of the kick-up portion 9 can be suppressed.
[0064]
  In the present embodiment, as shown in FIGS. 1, 2, and 5, an impact load applied to the front side frame 8 due to a frontal collision is received near the front portion of the front side frame 8 and the vicinity of the dash panel 7. In this case, shock absorbing portions 28 and 29 that are deformed with a load smaller than that of the dash panel 7 are provided.
The impact absorbing portions 28 and 29 are beads extending in the vertical direction, and are more fragile than the kick-up portion 9 with respect to the load in the longitudinal direction of the vehicle body while ensuring rigidity with respect to the load in the vertical direction. It compresses and deforms due to the impact load of the frontal collision and absorbs the impact.
[0065]
  According to this structure, the vicinity of the dash panel 7 of the front side frame 8 that does not require reinforcement can be positively compressed and deformed at the time of a frontal collision, so that the front side frame 8 can be increased by increasing the compression deformation stroke of the front side frame 8. Therefore, the dash panel 7 can be prevented from moving backward without increasing the weight of the vehicle body.
[0066]
  Next, a second embodiment of the present application will be described.
[0067]
  The present embodiment differs from the first embodiment only in that a reinforcing member for connecting the upper end of the kick-up portion 9 and the cowl 6 is provided on the passenger side as well as the reinforcing member 13. Since the parts are the same, a common reference numeral is attached, and only the reinforcing member on the passenger seat side will be described.
[0068]
  FIG. 7 is an explanatory diagram for explaining the arrangement of the reinforcing members corresponding to FIG. 3 of the first embodiment in the second embodiment of the present application.
[0069]
  As shown in FIG. 7, in the present embodiment, a reinforcing member 30 having a closed cross-sectional structure is provided between the kick-up portion 9 and the cowl 6 on the passenger seat side dash panel 7 outer side surface. The reinforcing member 30 has a U-shaped cross section that extends in the up-down direction with the dash panel 7 side open, and forms a closed cross section by joining a flange provided at the open end to the dash panel 7. .
[0070]
  Thus, in this embodiment, the rigidity of the kick-up portion 9 is increased not only on the driver's seat side but also on the passenger seat side, and the dash panel can be prevented from further retreating.
[0071]
  As described above, in the automobile to which the invention of the present application is applied, not only the impact load at the time of a frontal collision is transmitted from the kick-up portion to the floor frame, but also efficiently transmitted to the cowl and other rigid members for dispersion. Therefore, the rigidity of the front part of the passenger compartment can be improved without increasing the weight of the vehicle body, and the dash panel can be prevented from moving backward.
[Brief description of the drawings]
FIG. 1 is a perspective view of a front vehicle body structure according to a first embodiment as viewed from the front of a vehicle body.
FIG. 2 is a perspective view of the front vehicle body structure in the first embodiment as viewed from the passenger compartment side.
FIG. 3 is an explanatory diagram for explaining the arrangement of reinforcing members in FIG. 2;
FIG. 4 is an exploded perspective view for explaining a reinforcing member in the first embodiment.
FIG. 5 is a cross-sectional view taken along line AA in FIG. 1 of the reinforcing member in the first embodiment.
6 is a cross-sectional view taken along line BB in FIG. 1 of the reinforcing member in the first embodiment.
FIG. 7 is an explanatory diagram for explaining the arrangement of reinforcing members corresponding to FIG. 3 of the first embodiment in the second embodiment.
FIG. 8 is a side sectional view of a conventional front vehicle body structure.
[Explanation of symbols]
1 Car
2, 101 ...
3, 102 ... Engine room
4, 105 ... Floor
5 ... Hinge pillar
6 ... Cowl
7, 103 ... Dash panel
8, 104 ... Front side frame
9, 107 ... Kick-up part
10, 106 ... floor frame
11 ... side sills
13, 30 ... Reinforcing member
13a ... Upper member (inclined part)
14 ... Accelerator pedal
15 ... Brake pedal
16 ... Clutch pedal
18 ... Booster
23: Second reinforcing member(Outer reinforcement member)
24: Third reinforcing member(Inner reinforcement member)
25 ... Tunnel part
26: Connecting member
27. Fourth reinforcing member(Kick-up part reinforcement member)
28, 29 ... Shock absorber

Claims (11)

A floor portion of the passenger compartment, a pair of pillars extending in the vertical direction at both corners in the vehicle width direction of the front portion of the passenger compartment, and a cowl that is a rigid member spanned between the upper portions of the pair of pillars, A dash panel provided so as to cover a portion surrounded by the front edge of the floor portion, the pillar and the cowl, and a pair of fronts extending away from the vehicle interior side surface of the dash panel toward the front of the vehicle in the vehicle width direction A pair of kicks extending downward from the rear ends of the side frames and the pair of front side frames so as to form a closed cross section with the dash panel and the dash panel along the floor portion outside the dash panel. A front body structure of an automobile comprising an up portion and a pair of floor frames extending rearward from the lower end of the pair of kick-up portions along the floor portion,
A columnar reinforcing member having a substantially U-shaped cross section that opens rearward has an inclined portion that abuts the rear end of the upper surface of the front side frame and extends upwardly from the corresponding portion toward the cowl toward the rear of the vehicle. As described above, of the pair of kick-up portions, the vehicle width direction driver seat side kick-up portion side from the portion located inside the closed cross-section extends vertically above the upper surface of the front side frame,
A front body structure of an automobile, wherein a support portion that supports a booster that assists a brake pedal depression force is provided at the inclined portion . 2. The front portion of the automobile according to claim 1 , wherein a portion of the reinforcing member that contacts the rear end of the upper surface of the front side frame is inclined more horizontally than a support portion of the booster. Body structure. The reinforcing member bends and extends downward and downward from a portion spaced downward from the rear end of the front side frame upper surface,
The dash panel extends rearward and upward from a portion corresponding to the rear end of the front side frame upper surface in the vertical direction, and bends and extends downward and rearward from a portion spaced below the rear end of the front side frame upper surface. front body structure for an automobile according to claim 1 or 2, characterized in that it is formed as. 4. The vehicle according to claim 1, wherein the support portion is wider in a vehicle width direction than a portion below the upper surface of the rear end of the front side frame of the reinforcing member . Front body structure. The reinforcing member is combined with the kick-up portion and the dash panel to form a closed cross section that is continuous between the cowl and the floor frame on the outside of the cabin of the dash panel. The front body structure of an automobile according to claim 1. An outer reinforcing member is provided between the upper end of the kick-up portion and the pillar, and extends outward in the vehicle width direction along the dash panel from the upper end of the kick-up portion so as to connect the upper end of the kick-up portion and the pillar. 6. The front body structure of an automobile according to any one of claims 1 to 5 , wherein: Between the pair of kick-up portion upper end, claim 6, characterized in that to couple the pair of kick-up portion the upper end, the inner reinforcing member extending substantially horizontally along the dash panel is provided The front body structure of the automobile described in 1. At the lower part of the dash panel and at the center of the floor part, a tunnel part extending in the vehicle front-rear direction and having a convex section upward is provided, and the tunnel part and the inner reinforcing member are connected members. The vehicle front body structure according to claim 7 , wherein the vehicle front body structure is connected to each other. The outer reinforcing member and the inner reinforcing member are respectively located on the interior side of the dash panel , and the facing end portions of the outer reinforcing member and the inner reinforcing member are connected to each other, so that the vehicle of the dash panel is connected. 9. The front body structure of an automobile according to claim 7 or 8 , wherein a continuous closed cross section spanned between the pair of pillars is formed on the indoor side. The reinforcing member is provided corresponding to the kick-up portion on the driver's seat side in the vehicle width direction, and the kick-up portion on the passenger seat side includes the kick-up portion, the cowl, and the kick-up portion. 10. A front body of a vehicle according to any one of claims 1 to 9 , further comprising a kick-up portion reinforcing member that extends to an intermediate position in the up and down direction and is not connected to the cowl. Construction. 2. An impact absorbing portion that is deformed with a smaller load than the dash panel when an impact load applied to the front side frame due to a frontal collision is received in the vicinity of the dash panel of the front side frame. front body structure for an automobile according to any one of 1 0.

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