JP2007131260A - Dash panel reinforcing structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dash panel reinforcing structure of a vehicle having more enhanced strength. <P>SOLUTION: In the reinforcing structure, a dash upper side cross member 4 connecting an apron side member 3 with a dash side panel 2 composing a front pillar is disposed at the front side of a dash panel 1, a dash panel side reinforcement 5 is disposed on the rear surface of the dash panel 1 so as to oppose to the dash upper side cross member 4, and those opposed parts are mutually joined by a spot welding across the dash panel 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a dash panel reinforcing structure for a vehicle.

  As shown in FIG. 9, in the front structure of the vehicle, both side ends of the dash panel 51 are connected to a dash side panel 52 that constitutes a part of the front pillar. A dash upper cross member 53 is arranged in the vehicle width direction at the lower front portion of the dash panel 51, and apron side members (also referred to as front side members) 54 are provided at both side ends of the dash upper cross member 53. Each end is joined. Further, on the front side of the dash panel 51, as shown in FIG. 10, dash upper side cross members 55 connected to both ends of the dash upper cross member 53 are extended to the dash side panel 52. A dash panel side reinforcement 56 is disposed on the rear surface of the panel 51 with the dash panel 51 interposed therebetween.

  In such a vehicle front structure, as shown in FIG. 10, the dash upper side cross member 55 is a front side of the dash panel 51, and the dash upper side cross member 55 whose center in the vertical direction of the cross section bulges forward is formed. The lower flange 55a and the lower flange 56a of the dash panel side reinforcement 56 whose center in the vertical direction of the cross section bulges rearward are opposed to each other with the dash panel 51 interposed therebetween, and they are coupled to each other via the dash panel 51. Yes. Further, the upper portion of the dash upper side cross member 55 is extended upward with respect to the dash panel side lean force 56, and the upper flange 55 b is joined to the dash panel 51. The upper part is a position corresponding to the middle part in the height direction of the dash upper side cross member 55, and the upper flange 56 b is joined to the dash panel 51.

Further, at the lower part of the front surface between the apron side members 54 of the dash panel 51, as shown in FIG. 11, a dash having an inner end flange 57a joined to the dash panel 51 and an outer end flange 57b joined to the floor tunnel 58. A lower inner extension 57 is provided.
JP-A-8-282537 Utility Model Registration No. 2522690 JP 2004-276630 A JP 2003-118648 A

  Incidentally, in the vehicle front structure described above, the dash panel 51 is reinforced by the dash upper side cross member 55, the dash panel side lean force 56, and the dash lower inner extension 57. As a result, as shown by the dotted lines in FIGS. 10 and 11, the dash panel 51 may be deformed to the vehicle interior side.

  An object of the present invention is to solve the above-mentioned problems and to provide a vehicle dash panel reinforcing structure with higher strength.

A dash panel reinforcing structure for a vehicle according to the present invention includes a dash upper side cross member that connects an apron side member and a dash side panel that constitutes a part of a front pillar, and is disposed on the front surface of the dash panel. A dash panel side reinforcement is disposed on the rear surface so as to face the dash upper side cross member, and the facing portions are joined to each other by spot welding with the dash panel interposed therebetween.
In the dash panel reinforcing structure for a vehicle according to the present invention, one of the dash upper side cross member and the dash panel side reinforcement is a large member in the vertical direction of the vehicle relative to the other, and the one member is the vertical direction of the vehicle. The counter part is formed in the middle part of the.
In the vehicle dash panel reinforcing structure of the present invention, the dash upper cross member connected between the inner ends of the dash upper side cross member is disposed on the steering shaft insertion hole, and is joined to the dash panel. The dash lower inner extension that connects the apron side member and the floor tongue is disposed below the steering shaft insertion hole, and the steering shaft bracket through which the steering shaft passes is joined to the dash upper cross member and the dash lower inner extension. is there.

According to the first aspect of the present invention, the dash upper side cross member and the dash panel side lean force form closed cross sections that connect the apron side member and the front pillar at opposite positions with the dash panel interposed therebetween. Therefore, the load input to the apron side member can be reliably transmitted to the rigid front pillar, and deformation of the dash panel can be effectively suppressed.
According to invention of Claim 2, even if it is a dash upper side cross member and a dash panel side lean force from which the magnitude | size of the vertical direction of a vehicle body differs, a dash upper side cross member and a dash panel side lean force are via a dash panel. Are combined, a closed cross-section is formed at the opposite position, and the rigidity of the dash panel is improved.
According to the invention of claim 3, the strength of the dash panel where the steering shaft penetrates is reduced because a through hole is formed, but the steering shaft bracket is attached to the dash upper cross member and the dash lower inner extension. Since they are connected, the rigidity in the vicinity of the through hole of the dash panel can be improved. Furthermore, the dash panel can have sufficient strength against the backward movement of the steering system parts due to the load from the front of the vehicle.

Below, the dash panel reinforcement structure of the vehicle which concerns on this invention is demonstrated, referring drawings.
FIG. 1 is a perspective view of a vehicle body viewed from the front of the dash panel according to the present invention, and FIG. 2 is a rear view of the dash panel reinforcing structure of the vehicle according to the present invention. 3 is a perspective view of the vehicle body viewed from the front, FIG. 3 is a front view showing the right half portion viewed from the front of the vehicle body in FIG. 2, FIG. 4 is a cross-sectional view taken along line AA in FIG. 6 is a cross-sectional view taken along the line CC in FIG. 3, FIG. 7 is a cross-sectional view taken along the line DD in FIG. 3, and FIG. 8 is a diagram showing the propagation of force applied from the front. It is a figure.

  In the vehicle of the present embodiment, as shown in FIGS. 1 to 3, both side ends of the dash panel 1 are connected to a dash side panel 2 that constitutes a part of the front pillar. The proximal ends of the apron side members 3 are respectively arranged on both sides of the dash panel 1.

  The dash panel 1 between the left and right dash side panels 2 and the respective apron side members 3 includes a dash upper side cross member 4 joined to the front surface of the dash panel 1 and a dash panel joined to the rear surface of the dash panel 1. Side lean forces 5 are respectively provided.

As shown in FIG. 4, the dash upper side cross member 4 has a vertical middle portion 4a projecting rearward (in the direction of the dash panel), thereby bulging forward between the middle portion 4a and the upper and lower edges. The protruding parts 4b and 4c are formed. As shown in FIG. 3, the bulging portions 4 b and 4 c gradually approach toward the apron side member 3 and are associated with each other at the base end of the apron side member 3.
On the other hand, the dash panel side reinforcement 5 is formed with a bulging portion 5a in which an intermediate portion in the vertical direction bulges rearward.

Then, the lower flange 4d formed on the lower edge of the dash upper side cross member 4 and the lower flange 5b formed on the lower edge of the dash panel side reinforcement 5 are opposed to each other with the dash panel 1 interposed therebetween, and they are spot welded. The upper flange 5c formed at the upper edge of the dash upper side cross member 4 and the upper edge of the dash panel side reinforcement 5 are opposed to each other with the dash panel 1 interposed therebetween, and they are bonded to each other by spot welding. The upper flange 4e formed on the upper edge of the dash upper side cross member 4 is joined to the dash panel 1 by spot welding. In addition, the intermediate part 4a is formed in the groove shape extended along the upper flange 5c used as the upper edge of the dash panel side reinforcement 5 with respect to the bulging parts 4b and 4c.
With such a structure, two closed cross sections formed by the dash upper side cross member 4 and the dash panel 1 can be formed vertically, and the dash upper side cross member 4 has a groove shape of the intermediate portion 4a. The rigidity is improved and both sides of the dash panel 1 can be effectively reinforced. And since the dash upper side cross member 4 and the dash panel side reinforcement 4 are joined up and down across the dash panel 1 to form a closed cross section, the closed cross section can be formed even if the amount of protrusion from the dash panel 1 is small. Therefore, an effective closed cross-sectional structure can be formed. Further, since the dash panel 1 exists in the closed cross section and functions as a reinforcing member that prevents the closed cross section from being crushed, both side portions of the dash panel 1 can be reinforced by a synergistic effect. Further, the portion of the dash panel 1 is formed in a curved shape so as to constitute the rear portion of the wheel house, but the dash upper side cross member 4 and the dash panel side lean force 5 are provided at the front and rear of the curved dash panel 1. Is disposed and the curved surface of the dash panel 1 does not have to be used as a member having a closed cross section, so that a closed cross section with high strength can be freely set. In the embodiment, as shown in FIG. 8, a substantially linear closed cross-sectional structure is formed between the base end of the apron side member 3 and the dash side panel 2 constituting the front pillar, and the rigidity of the dash panel 1 is increased. While improving, it also becomes possible to transmit force to a more rigid member, and can suppress a deformation | transformation of a dash panel. Moreover, even if the dash panel 1 is joined to the front end of the front pillar (the front end of the dash side panel 2) to secure the indoor space, a closed cross section can be easily secured.

As shown in FIGS. 1 and 3, end portions of a dash upper cross member 6 joined to the front surface of the dash panel 1 are connected to inner end portions 4 f of the left and right dash upper side cross members 4, respectively. . The base ends of the apron side members 3 described above are coupled to the inner end portions 4 f of the respective dash upper side cross members 4.
The dash upper cross member 6 extends downward from the lower end of the dash upper side cross member 4. As shown in FIG. 3, the dash upper cross member 6 is formed with a curved notch 6 a so as to avoid the steering shaft insertion hole 7 formed in the dash panel 1.

On the other hand, a dash lower inner extension 8 is disposed on the lower surface of the dash panel 1 as shown in FIG. As shown in FIGS. 6 and 7, the dash lower inner extension 8 has bulging portions 8a and 8b extending in the front-rear direction, and a recess 8c between the peripheral edge and the bulging portion is provided between the dash panel 1 and the floor. It is joined to the side surface of the tunnel 9.
The dash lower inner extension 8 is joined to the dash panel 1 to be a reinforcing member that forms a closed cross section, but a recess 8c is formed between the bulging portions, and the recess 8c is also joined to the dash panel 1. The surface rigidity of the dash panel 1 is improved, and in addition to preventing deformation, uncomfortable vibration of the dash panel 1 and transmitted noise can be prevented, and passenger comfort is improved.

Further, as shown in FIG. 5, a dash panel extension 10 having a steering shaft insertion hole 10a is disposed on the periphery of the steering shaft insertion hole 7 of the dash panel 1, and a steering shaft is provided on the front surface of the dash panel extension. A steering shaft bracket 11 having an insertion hole 11a is disposed.
The substantially entire peripheral edge portion 10b of the dash panel extension 10 is joined to the lower surface of the dash panel 1, the upper edge portion 10c is joined to the upper edge portion 6b of the dash upper cross member 6, and the upper edge portion of the steering shaft bracket 11 11c is joined to the notch peripheral part 6c of the dash upper cross member 6, and the lower edge part 11d is joined to the dash panel 1 so as to be sandwiched between the dash panel 1 and the upper edge 8d of the dash lower inner extension 8. ing.
As described above, when the steering shaft insertion hole 7 is formed at the position of the dash upper cross member 6 due to the layout, the closed cross section formed by the dash panel 1 and the dash upper cross member 6 is interrupted, and the rigidity is lowered. However, in the present embodiment, the steering shaft bracket 11 and the dash panel extension 10 are arranged on the peripheral edge portion 6c of the notch portion of the dash upper cross member 6, so that the left and right closures are formed around the steering shaft insertion holes 10a and 11a. A closed cross-section is formed in which the cross-sections are continuous (see FIG. 5), and the reduction in the rigidity of the part is minimized, including the rigidity of each part.

  As shown in FIG. 7, the inner end portion 11e of the steering shaft bracket 11 is coupled to the floor tunnel panel 9a with the dash panel 1 interposed therebetween. And the floor tunnel panel 9a of the said part is joined to the dash panel 1 on both sides of the floor tunnel reinforcement 12 which is the reinforcement member. Thereby, the rigidity of the periphery of the steering shaft insertion hole 7 of the dash panel 1 can be further improved.

According to the vehicle dash panel reinforcing structure thus configured, as shown in FIG. 8, the force from the front is transmitted as indicated by the arrow, and the apron side member 3 and the dash upper cross member 6 and the dash upper member are transmitted. The component force distributed to the side cross member 4 and the dash panel side lean force 5 and propagated to the dash upper side cross member 4 and the dash panel side lean force 5 is received by the dash side panel 2 constituting the front pillar.
Therefore, the influence on the dash panel 1 is reduced, and deformation of the dash panel 1 is prevented.

1 is a perspective view of a vehicle body as viewed from the front of a dash panel, showing a dash panel reinforcing structure for a vehicle according to the present invention. 1 is a perspective view of a vehicle body showing a vehicle dash panel reinforcing structure according to the present invention, viewed from the rear of the dash panel. FIG. 3 is a front view showing a right half portion viewed from the front of the vehicle body in FIG. 2. It is the sectional view on the AA line in FIG. FIG. 4 is a sectional view taken along line BB in FIG. 3. It is CC sectional view taken on the line in FIG. It is the DD sectional view taken on the line in FIG. It is the figure which showed propagation of the force applied from the front. It is the perspective view of the vehicle body which showed the conventional dash panel reinforcement structure and was seen from the front of the dash panel. It is sectional drawing of the dash lower inner extension arrange | positioned under the dash panel between apron side members, and is sectional drawing which showed the deformation | transformation state of the dash panel by the force applied from the front. It is sectional drawing of a dash upper side cross member and a dash panel side reinforcement, and is sectional drawing which showed the deformation | transformation state of the dash panel by the force applied from the front.

Explanation of symbols

1 Dash panel
2 Dash side panel
3 Apron side member 4 Dash upper side cross member 4a Intermediate part 4b, 4c Swelling part 4d Lower flange 4e Upper flange 4f Inner end part 5 Dash panel side lean force 5a Swelling part 6 Dash upper cross member 6a Curved notch part 6b Upper edge 6c Notch peripheral edge 7 Steering shaft insertion hole 8 Dash lower inner extension 8a, 8b Expansion part 8c Between expansion parts 8d Upper edge 9 Floor tunnel 9a Floor tunnel panel 10 Dash panel extension 10a Steering shaft insertion hole 10b Almost all peripheral edge portion 10c Upper edge portion 11 Steering shaft bracket 11a Steering shaft insertion hole 11b Almost all peripheral edge portion 11c Upper edge portion 11d Lower edge portion 11e Inner end portion 12 Floor tunnel leaf Source

Claims (3)

  A dash upper side cross member that connects the apron side member and the dash side panel that forms part of the front pillar is disposed on the front surface of the dash panel, and the rear surface of the dash panel is opposed to the dash upper side cross member. A dash panel reinforcing structure for a vehicle, in which dash panel side reinforcements are arranged and their opposing portions are joined to each other by spot welding with the dash panel interposed therebetween.   One of the dash upper side cross member and the dash panel side reinforcement is a large member in the vertical direction of the vehicle with respect to the other, and the opposing portion is formed in an intermediate portion of the one member in the vertical direction of the vehicle. The dash panel reinforcing structure for a vehicle according to claim 1.   A dash upper cross member connected between the inner ends of the dash upper side cross member is disposed above the steering shaft insertion hole, and is joined to the dash panel to connect the apron side member and the floor tongue portion. The inner extension is disposed below the steering shaft insertion hole, and a steering shaft bracket through which the steering shaft passes is joined to the dash upper cross member and the dash lower inner extension. Vehicle dash panel reinforcement structure.

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