JP6160327B2 - Car cowl structure - Google Patents

Description

  The present invention relates to an automobile cowl structure.

  Conventionally, a cowl top is disposed along the vehicle width direction at the front of the vehicle body (see, for example, Patent Document 1). The cowl top described in Patent Document 1 includes a dash upper having a U-shaped cross-section with an opening at the top, and a cowl top cover disposed so as to cover the opening at the top of the dash upper.

  The cowl top cover is provided with a convex portion formed in an upward U-shaped cross section that is convex upward. Accordingly, the obstacle hits the rear end portion of the hood, the rear end portion of the hood is deformed downward, and the convex portion of the cowl top cover is crushed, so that the collision load can be absorbed.

JP 2005-238915 A

  However, since the convex part of the cowl top cover described above is formed in a gently curved shape with an inverted U-shaped cross section, the rigidity of the cowl top cover is low. For this reason, the cowl top cover may resonate due to vibrations of the vehicle engine, air conditioner, etc., and unpleasant sounds and vibrations may be transmitted to the vehicle interior.

  On the other hand, it is conceivable to suppress the resonance by connecting the cowl top cover to the vehicle body member with a support member or the like. Become.

  Accordingly, an object of the present invention is to provide an automobile cowl structure capable of obtaining high rigidity while maintaining an inexpensive cost.

  An automobile cowl structure according to the present invention includes a dash upper and a cowl top cover. The cowl top cover has a main body portion disposed at the rear portion of the joining surface to be joined to the windshield.

As for the plane part which constitutes the main part, a center side plane part is arranged on the center side in the vehicle width direction, and an outside plane part is arranged at a position higher than the center side plane part on the vehicle width direction outer side. The side plane part and the outer side plane part are connected via a connection part. Further, each of the central plane portion and the outer plane portion is formed such that the height of the front end portion is equal to the height of the rear end portion.

  According to the cowl structure of an automobile according to the present invention, since the flat portion of the cowl top cover is formed in a stepped shape, the rigidity of the cowl top cover is improved. Therefore, since no separate parts or the like are used, it is possible to provide an automobile cowl structure that can obtain high rigidity while maintaining low cost.

It is the rear view which looked at the cowl top and windshield which concern on embodiment of this invention toward the front from the vehicle interior. FIG. 2 is an exploded perspective view of FIG. 1. It is the perspective view which looked at the cowl top which concerns on embodiment of this invention from diagonally forward. It is the perspective view which looked at the cowl top cover which concerns on embodiment of this invention from diagonally backward. It is the rear view which looked at the cowl top cover concerning the embodiment of the present invention from back. It is sectional drawing by the AA line of FIG. It is sectional drawing by the BB line of FIG. It is sectional drawing by CC line of FIG. FIG. 4 is a partial perspective view of the cowl top cover and the air conditioner at the center in the vehicle width direction.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the front side of the vehicle is FR and the rear side is RR. Further, the right side in the vehicle width direction is RH, and the left side is LH. Further, the upper side of the vehicle is designated as UPR, and the lower side is designated as LWR.

  As shown in FIGS. 1 to 3, the cowl top 1 according to this embodiment extends in a long shape along the vehicle width direction, and a windshield 3 is joined to the cowl top 1.

  The cowl top 1 includes a dash upper 5 formed in an L shape in a side view, and a cowl top cover 7 joined to the upper portion of the dash upper 5 by, for example, spot welding.

  Specifically, the dash upper 5 is integrated with a horizontal wall 9 extending horizontally along the vehicle width direction and the front-rear direction, and a vertical wall 11 bent from the rear end of the horizontal wall 9 and extending upward. Is formed. A plurality of beads 15 are formed at a corner portion 13 between the horizontal wall 9 and the vertical wall 11 in the vehicle width direction central portion with a predetermined interval in the vehicle width direction. This bead 15 improves the rigidity of the dash upper 5. The upper end 17 of the vertical wall 11 of the dash upper 5 is formed in a shape along the rear end 19 of the cowl top cover 7, and the rear end of the cowl top cover 7 is connected to the upper end 17 of the vertical wall 11 of the dash upper 5. 19 is joined.

  As shown in FIGS. 4 to 8, the cowl top cover 7 includes a joining surface 21 disposed at the front end portion and a main body portion 23 disposed on the rear side of the joining surface 21.

  The joint surface 21 is a flat portion that extends along the vehicle width direction and extends obliquely upward as it goes rearward. A front end portion 25 (see FIG. 2) of the windshield 3 formed in a rectangular shape is joined to the joining surface 21 of the cowl top cover 7. Accordingly, the windshield 3 extends obliquely upward as it goes rearward from the joint surface 21 of the cowl top cover 7 (see FIG. 2).

  The main body portion 23 includes a vertical wall surface 31 that is bent from the rear end of the joint surface 21 and extends downward, and a flat surface portion 33 that is bent from the lower end of the vertical wall surface 31 and extends rearward. Become.

  As shown in FIG. 4, the vertical wall surface 31 includes a central vertical wall surface 35 disposed on the center side in the vehicle width direction, and an outer vertical wall surface 37 disposed on the outer side in the vehicle width direction of the central side vertical wall surface 35. 39, the height dimension of the central vertical wall surface 35 is set higher than the height dimension of the outer vertical wall surface 37, as shown in FIGS. The height of the center-side vertical wall surface 35 at the center in the vehicle width direction of the cowl top cover 7 is H1, and the connection is arranged at the boundary between the center-side vertical wall surface 35 and the outer vertical wall surfaces 37, 39 of the outer vertical wall surfaces 37, 39. The height of the portions 41 and 43 is H2, and the height of the end portions in the vehicle width direction of the outer vertical wall surfaces 37 and 39 is H3. In this case, the magnitude relationship is H1> H2> H3.

  Further, as shown in FIG. 5, the flat surface portion 33 is disposed at a position corresponding to the central flat surface portion 51 disposed at a position corresponding to the central vertical wall surface 35 and the outer vertical wall surfaces 37 and 39. The outer plane portions 53 and 55 and the connecting portions 41 and 43 that connect the central plane portion 51 and the outer plane portions 53 and 55.

  The outer plane portion 53 is disposed at a position higher than the central plane portion 51, and the connecting portions 41 and 43 extend obliquely upward as they go outward in the vehicle width direction in the rear view. The flat portion 33 is formed in a step shape as a whole. That is, when the cowl top cover 7 is viewed from the back, the height of the joint surface 21 along the vehicle width direction is constant, and therefore the height of the central side vertical wall surface 35 is high at the center in the vehicle width direction. The central plane portion 51 is lowered. Moreover, since the height of the outer vertical wall surfaces 37 and 39 is low, the outer flat portions 53 and 55 are higher than the central flat portion 51 in the outer portion in the vehicle width direction.

  As shown in FIG. 4, a plurality of beads are formed on the flat surface portion 33 of the cowl top cover 7. Three reinforcing beads 57, 59, and 61 are formed at a boundary portion (corner portion) between the vertical wall surface 31 and the flat surface portion 33 at a predetermined interval along the vehicle width direction. And in the plane part 33, it arrange | positions in the vehicle width direction by arrange | positioning the four concave beads 63 arranged on the front side intermittently at predetermined intervals along the vehicle width direction, and the rear side of these concave beads 63. There is one long concave bead 65 extending along. A flange 67 that bends and extends downward extends along the vehicle width direction at the rear end of the flat portion.

  Further, as shown in FIG. 9, an air conditioning duct 71, which is an indoor part, is disposed behind the cowl top cover 7. The air conditioning duct 71 has an air passage 77 formed between a front side wall 73 and a rear side wall 75, and a flange 79 is formed at each upper end. A defroster 81 is disposed on these flanges 79, and an upper opening 83 of the air conditioning duct 71 and an outlet 85 of the defroster 81 communicate with the air passage 77 of the air conditioning duct 71.

  Here, the upper part of the front side wall 73 of the air conditioning duct 71 is disposed in the vicinity of the cowl top cover 7. However, as shown in FIG. 9, since the height dimension of the central vertical wall surface 35 of the cowl top cover 7 is large, a large indoor space 87 is formed between the cowl top cover 7 and the front side wall 73 of the air conditioning duct 71. ing.

  Below, the effect by embodiment of this invention is demonstrated.

(1) A cowl structure for an automobile according to an embodiment of the present invention includes a dash upper 5 extending along the vehicle width direction of the vehicle, and joined to the upper portion of the dash upper 5 extending along the vehicle width direction. A cowl top cover 7 is provided.

  The cowl top cover 7 includes a joining surface 21 that is joined to the front end portion 25 of the windshield 3, and a main body portion 23 that is disposed at the rear part of the joining surface 21.

  The main body portion 23 includes a vertical wall surface 31 that is bent from the rear end of the joint surface 21 and extends downward, and a flat surface portion 33 that is bent from the lower end of the vertical wall surface 31 and extends rearward. Become.

  When viewed from the rear, the flat surface portion 33 is disposed on the center side in the vehicle width direction, and on the center side in the vehicle width direction. It has the outer side plane parts 53 and 55 arrange | positioned in a position higher than the plane part 51, and the connection parts 41 and 43 which connect these center side plane parts 51 and the outer side plane parts 53 and 55.

  The flat portion 33 of the cowl top cover 7 is formed in a step shape from the central flat portion 51, the outer flat portions 53 and 55, and the connecting portions 41 and 43, and the flat portion 33 is coupled to the vertical wall surface 31. The rigidity of the cowl top cover 7 is improved. Therefore, even if vibration from the engine, air conditioner, etc. is transmitted to the dash upper 5, the cowl top cover 7 suppresses resonance due to the vibration, so that unpleasant sound and vibration are effectively transmitted to the vehicle interior. Can be prevented.

  In addition, since it has a simple structure in which the shape of the cowl top cover 7 is changed, a member for suppressing resonance is not required, and an increase in the number of parts and an increase in the number of mounting work steps can be suppressed, so that an inexpensive cost can be achieved. Thus, a highly rigid cowl top cover 7 can be obtained.

(2) For the vertical wall surface 31 in the cowl top cover 7, the central vertical wall surface 35 connected to the central flat surface portion 51 is more than the outer vertical wall surfaces 37 and 39 connected to the outer flat surface portions 53 and 55. The height dimension in the vertical direction is set large.

  Since the center-side vertical wall surface 35 is larger in height in the vertical direction than the outer vertical wall surfaces 37, 39, the indoor space in the center in the vehicle width direction is increased. Therefore, even when a collision load is input to the cowl top cover 7 and the cowl top cover 7 is deformed at the time of a frontal collision of the vehicle, avoid interference between the cowl top cover 7 and indoor components (for example, the air conditioning duct 71). Can do.

  Further, since the indoor space 87 in the center portion in the vehicle width direction becomes large, a space for arranging the sound insulating material can be provided in the main body portion 23 of the cowl top cover 7.

5 dash upper 7 cowl top cover 21 joint surface 23 body portion 31 vertical wall surface 33 flat surface portion 35 central vertical wall surface 37, 39 outer vertical wall surface 41, 43 connecting portion 51 central flat surface portion 53 outer flat surface portion

Claims (3)

A dash upper extending along the vehicle width direction of the vehicle;
A cowl top cover extending along the vehicle width direction and joined to the upper portion of the dash upper, and
The cowl top cover is composed of a joining surface joined to the front end portion of the windshield, and a main body portion arranged at the rear part of the joining surface,
The main body portion is composed of a vertical wall surface that is bent from the rear end of the joint surface and extends downward, and a flat surface portion that is bent from the lower end of the vertical wall surface and extends rearward.
When viewed from the rear, the plane portion is disposed on the center side plane portion disposed on the center side in the vehicle width direction and on the vehicle width direction outer side than the center side plane portion and from the center side plane portion. possess an outer flat portion is also disposed at a higher position, and a connecting portion connecting the these central side flat portion and the outer flat portion,
Each of the central plane portion and the outer plane portion has a front end portion and a rear end portion that are formed to have the same height . 2. The cowl structure for an automobile according to claim 1, wherein each of the central plane portion and the outer plane portion extends perpendicularly to the vertical wall surface. About the vertical wall surface in the cowl top cover, the height dimension in the vertical direction of the central vertical wall surface connected to the central flat surface portion is set larger than the vertical vertical wall surface connected to the outer flat surface portion. The cowl structure for an automobile according to claim 1 or 2 .

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