JP6136350B2 - Structure around the cowl top panel - Google Patents

Description

  The present invention relates to a peripheral structure of a cowl top panel disposed along a vehicle width direction below a windshield glass in front of a vehicle body.

  In vehicles such as automobiles, when an external object such as a pedestrian comes into contact with the windshield glass (front glass) in front of the vehicle body, in order to protect the external object, such a contact is added to the windshield glass from above. It is required to absorb the load applied (hereinafter referred to as “contact load”). A cowl top panel is arranged below the windshield glass along the vehicle width direction. When an external object contacts the windshield glass, the windshield glass deformed by the contact load is received by the cowl top panel. Will be. Therefore, the conventional vehicle employs a structure that absorbs the contact load by reducing the rigidity of the cowl top panel and its peripheral part (hereinafter referred to as “cowl top panel peripheral part”).

  Regarding the structure of the periphery of the cowl top panel, for example, in Patent Document 1, a cowl top panel (cowl upper panel) is arranged along the vehicle width direction below the windshield glass (front window) in front of the vehicle body, and the windshield glass The windshield glass is supported by a window support portion disposed between the upper panel and the cowl top panel, and the cowl top panel is joined to these lower members so as to form a closed section together with the lower members. . In such a structure, when an external object comes into contact with the windshield glass, the cowl top panel and its lower member are crushed from the cowl top panel side by the contact load so that the closed cross section of the cowl top panel and its lower member is crushed from the cowl top panel side. Has become deformed.

Japanese Patent Laid-Open No. 2007-22199

  Further, vibration and noise due to disturbance factors are likely to be generated in the periphery of the cowl top panel, and the periphery of the cowl top panel affects noise due to resonance in the vehicle interior. However, in the structure of Patent Document 1, the rigidity of the cowl top panel and the members below the cowl top panel are low so that the cowl top panel is easily deformed. Therefore, vibration and noise due to disturbance factors are likely to occur in the periphery of the cowl top panel. Furthermore, noise due to resonance in the passenger compartment is likely to occur. This is a problem.

  The present invention has been made in view of such a situation, and an object of the present invention is to reduce vibration and noise, and to efficiently reduce the load applied when an external object comes into contact with the windshield glass in front of the vehicle body. It is to provide a peripheral structure of a cowl top panel that can be absorbed.

In order to solve the problem, a cowl top panel peripheral structure according to an aspect of the present invention includes a cowl top panel disposed along a vehicle width direction below a windshield glass in front of a vehicle body, and a vehicle width of the vehicle body. A cowl front panel disposed along the vehicle width direction below the cowl top panel so as to connect the dash side panels on both sides in the direction, and at the center of the cowl top panel in the vehicle width direction, the cowl top panel and A peripheral structure of a cowl top panel comprising a connecting bracket arranged along the vehicle vertical direction so as to connect the cowl front panel, the cowl top panel having a substantially U-shaped cross section, The cowl top panel has a front corner formed between a top portion and a front portion extending obliquely downward and forward from a front end of the top portion, and the top portion A rear corner is formed between the rear end of the top portion and a rear portion extending obliquely downward, and the front portion of the cowl top panel is disposed so as to face the windshield glass. Two beads projecting downward in the vehicle are formed in the center portion in the width direction, and the two beads are directed from the front corner or the vicinity thereof to the rear corner and intersect the rear corner. And an attachment body provided at the upper end of the connection bracket is attached to the rear portion of the cowl top panel so as to straddle one of the two beads.

  In such a configuration, when an external object contacts the windshield glass, the windshield glass is deformed downward by a load applied from above. The deformed windshield glass contacts the cowl top panel, and a load from an external object is transmitted to the cowl top panel via the windshield glass. Due to this load, the cowl top panel is deformed so as to widen the angle of the front corner, and is bent and deformed in the front-rear direction so as to narrow the angle of the rear corner. When the bending deformation in the front-rear direction that narrows the angle of the rear side corner portion of the cowl top panel further proceeds, the cowl top panel is deformed so that the entire cowl top panel moves downward. When the windshield glass is further deformed, the windshield glass and the cowl top panel are brought into close contact with each other, and a load from an external object is directly applied to the cowl top panel. Due to this load, the cowl top panel is bent and deformed in the vehicle width direction around one of the two beads. Thereafter, the cowl top panel is deformed so as to move the whole of the cowl top panel further downward.

  Therefore, the cowl top panel is deformed in the front-rear direction so as to narrow the angle of the rear side corner portion of the cowl top panel, and is folded in the vehicle width direction around one of the two beads in the cowl top panel. The stress applied to the load is distributed so that the load can be absorbed efficiently by the cowl top panel and its periphery. In particular, since the attachment body at the upper end of the connection bracket is attached to the rear part of the cowl top panel so as to straddle only one of the two beads, the cowl top panel is firstly mounted around the other of the two beads. After further bending deformation in the front-rear direction, which is bent and deformed in the width direction and narrows the angle of the rear corner of the cowl top panel, the cowl top panel is folded in the vehicle width direction around one of the two beads. It will be deformed. Therefore, the load can be efficiently absorbed by the stepwise deformation of the cowl top panel. Moreover, the rigidity of the cowl top panel can be increased with respect to a load other than the load from above by the two beads protruding downward from the vehicle. Furthermore, since the attachment body at the upper end of the connection bracket is attached to the rear part of the cowl top panel so as to straddle one of the two beads, the rigidity of the cowl top panel can be further increased. By increasing the rigidity of the cowl top panel in this way, vibration and noise can be reduced.

  In the peripheral structure of the cowl top panel according to one aspect of the present invention, the vehicle interior side disposed along the vehicle front-rear direction so as to connect the cowl top panel and the vehicle interior structure positioned behind the cowl top panel. A bracket is further provided, and an attachment body provided at a front end of the vehicle compartment side bracket is attached to the rear portion of the cowl top panel so as to straddle the other of the two beads. Therefore, while the vehicle compartment side bracket can suppress bending deformation in the vehicle width direction around the other of the two beads in the cowl top panel, the vehicle width around the one of the two beads in the cowl top panel. Directional deformation can be promoted. Accordingly, the bending deformation of the cowl top panel in the vehicle width direction can be adjusted so as to efficiently disperse the stress applied to the cowl top panel. Moreover, when the rear-end part of the compartment side bracket is attached to the instrument panel, for example, the vibration and noise of the instrument panel that affect the merchantability of the vehicle can be efficiently reduced.

  In the peripheral structure of the cowl top panel according to one aspect of the present invention, the two beads are oriented parallel to each other, and the distance between the two beads is shorter than the total length of the other of the two beads. Therefore, the distance between the two beads is adjusted so as to promote a stepwise deformation of the cowl top panel, and the load can be efficiently absorbed by the cowl top panel and its peripheral portion.

  In the peripheral structure of the cowl top panel according to an aspect of the present invention, one of the two beads extends between the upper end and the lower end of the rear portion of the cowl top panel. Therefore, bending deformation in the vehicle width direction around one of the two beads in the cowl top panel can be promoted, and the load can be efficiently absorbed by the cowl top panel and its peripheral part. Moreover, the rigidity of the rear part of the cowl top panel is efficiently increased by one of the two beads, and vibration and noise can be reduced.

  According to the peripheral structure of the cowl top panel according to one aspect of the present invention, vibration and noise can be reduced, and a load applied when an external object contacts the windshield glass in front of the vehicle body can be efficiently absorbed.

1 is a perspective view schematically showing a front part of a vehicle body including a peripheral structure of a cowl top panel according to an embodiment of the present invention. 1 is a perspective view schematically showing a peripheral structure of a cowl top panel according to an embodiment of the present invention when viewed obliquely from the upper front of a vehicle. FIG. 2 is a plan view schematically showing the peripheral structure of the cowl top panel according to the embodiment of the present invention when viewed from above the vehicle. It is AA sectional drawing of FIG. 1 is a perspective view schematically showing a peripheral structure of a cowl top panel according to an embodiment of the present invention when viewed obliquely from above and rearward of a vehicle. It is the B section enlarged view of FIG. In embodiment of this invention, it is a top view which shows roughly the attachment structure of the connection bracket to a cowl top panel, and a vehicle compartment side bracket seeing a cowl top panel from the vehicle upper direction in the state shown with the broken line. It is a figure which shows the cross section cut | disconnected along the AA line | wire of FIG. 3 in the state immediately after an external object contacted the windshield glass. It is a figure which shows the cross section cut | disconnected along the AA line of FIG. 3 in the state which the deformation | transformation of the windshield glass and the cowl top panel advanced. It is a figure which shows the cross section cut | disconnected along CC line | wire of FIG. 3 in the state which the deformation | transformation of the windshield glass and the cowl top panel advanced.

  A peripheral structure of the cowl top panel according to the embodiment of the present invention will be described. As shown in FIG. 1, the vehicle body front portion 1 of the vehicle has a windshield glass 2, and the windshield glass 2 is located above the rear portion of the engine room E and in front of the vehicle compartment C. The windshield glass 2 is formed so as to incline from the front to the rear as it goes from below to above. The vehicle body front portion 1 has a cowl top panel 3 disposed along the vehicle width direction below the lower end portion of the windshield glass 2. As shown in FIG. 2, a cowl front panel 4 is disposed below the cowl top panel 3 along the vehicle width direction. The cowl front panel 4 connects the dash side panels 5 positioned on both sides of the vehicle body front portion 1 in the vehicle width direction. The cowl top panel 3 and the cowl front 4 are connected by a connecting bracket 6. The connecting bracket 6 is disposed along the vertical direction at the approximate center of the cowl top panel 3 in the vehicle width direction. As shown in FIGS. 2 to 6, the cowl top panel 3 and an instrument panel (not shown) located behind the cowl top panel 3 are connected by a vehicle compartment side bracket 7. The vehicle compartment side bracket 7 is disposed along the front-rear direction at the approximate center of the cowl top panel 3 in the vehicle width direction.

  Details of the cowl top panel 3 will be described with reference to FIGS. As shown in FIG. 4, the cowl top panel 3 has a substantially U-shaped cross section. As shown in FIGS. 2 to 5, such a cowl top panel 3 includes a top portion 3 a, a front portion 3 b that extends diagonally forward and downward from the front end of the top portion 3 a, and a diagonally rearward downward direction from the rear end of the top portion 3 a. And a rear portion 3c. As shown in FIG. 4 again, the front portion 3b of the cowl top panel 3 is disposed so as to face the windshield glass 2, and as an example, it may be disposed substantially parallel to the windshield glass 2. As shown in FIGS. 2 to 5 again, a front corner 3d is formed between the top 3a and the front 3b, and a rear corner 3e is formed between the top 3a and the rear 3c. .

  As shown in FIG. 5 to FIG. 7, a first bead 3 f and a second bead 3 g having a throttle shape protruding downward are formed at the center portion in the vehicle width direction of the cowl top panel 3. The first bead 3f and the second bead 3g are oriented parallel to each other along the front-rear direction. Such a first bead 3f extends from a position near the front corner 3d at the top 3a toward the rear corner 3e, intersects with the rear corner 3e, and extends from the upper end of the rear portion 3c to the lower end of the rear portion 3c. It extends. The second bead 3g extends from the position near the front corner 3d of the top 3a toward the rear corner 3e, intersects with the rear corner 3e, and extends from the upper end of the rear 3c to the middle in the vertical direction of the rear 3c. ing. In this case, the front ends of the first and second beads 3f and 3g are located in the vicinity of the front corner 3d of the top 3a. Such a distance between the first bead 3f and the second bead 3g is shorter than the entire length of the second bead 3g.

  With reference to FIG.6 and FIG.7, the detail of the connection bracket 6 and the compartment side bracket 7 is demonstrated. An attachment body 8 is provided at the upper end of the connection bracket 6, and the attachment body 8 is formed in a substantially hat shape in sectional view. The attachment body 8 has a convex portion 8a that protrudes downward, and an attachment portion 8b that extends from both ends of the convex portion 8a in the vehicle width direction. The convex portion 8 a is located below the first bead 3 f in a region between the front end of the top portion 3 a and the middle of the rear portion 3 c in the cowl top panel 3, and the first bead of the cowl top panel 3. 3 f is surrounded by the convex portion 8 a of the attachment body 8. The attachment portion 8b is arranged so as to overlap the area of the cowl top panel 3 located on both sides in the vehicle width direction with respect to the first bead 3f. The attachment body 8 of such a connection bracket 6 is arrange | positioned so that the 1st bead 3f may be straddled. Although not particularly shown, the connecting bracket 6 extends from the convex portion 8 a of the mounting body 8.

  As shown in FIGS. 6 and 7, a mounting body 9 is provided at the front end of the passenger compartment side bracket 7, and the mounting body 9 is formed in a substantially hat shape in cross section. The attachment body 9 has a convex portion 9a that protrudes rearward, and attachment portions 9b that extend in the vehicle width direction from both ends of the convex portion 9a in the vehicle width direction. The convex portion 9a is located on the rear side of the second bead 3g. Moreover, the attaching part 9b is arrange | positioned so that it may overlap with the area | region of the cowl top panel 3 located in the vehicle width direction both sides with respect to the 2nd bead 3g. Therefore, the attachment body 9 of the compartment side bracket 7 is disposed so as to straddle the second bead 3g. As shown in FIG. 7, the rear portion 3 c of the cowl top panel 3, the second bead side mounting portion 8 b in the mounting body 8 of the connection bracket 6, and the first in the mounting body 9 of the vehicle compartment side bracket 7. It arrange | positions so that it may overlap with the attaching part 9b by the side of the bead 3f. Furthermore, the attachment body 9 is preferably disposed at a sufficient distance from the rear corner 3g, and is disposed at the middle in the vertical direction of the rear portion 3c of the cowl top panel 3 in FIG. As shown in FIG. 6 again, the vehicle compartment side bracket 7 extends from the convex portion 9 a of the attachment body 9.

  The attachment of the connecting bracket 6 and the vehicle compartment side bracket 7 will be described. The attachment portion 8b of the attachment body 8 of the connecting bracket 6 and the top portion 3a and the rear portion 3c of the cowl top panel 3 are joined by spot welding, and the attachment portion 9b of the attachment body 9 of the vehicle compartment side bracket 7 and the cowl top panel 3 The rear part 3c is joined by spot welding. In particular, the rear portion 3c of the cowl top panel 3, the second bead side mounting portion 8b of the connecting bracket 6 mounting body 8, and the first bead 3f mounting of the mounting bracket 9 of the vehicle interior side bracket 7 are mounted. Three pieces are joined to the portion 9b by spot welding.

  As described above, according to the present embodiment, the following operations and effects can be obtained. According to the present embodiment, as shown in FIG. 8, when the external object W comes into contact with the windshield glass 2, the windshield glass 2 is deformed downward by the load F applied from above. The deformed windshield glass 2 comes into contact with the cowl top panel 3, and the load F 1 from the external object W is transmitted to the cowl top panel 3 through the windshield glass 2. As shown in FIGS. 9 and 10, the load F1 causes the cowl top panel 3 to be deformed so as to widen the angle of the front corner 3d and bend back and forth so as to narrow the angle of the rear corner 3e. Deform. When the bending deformation in the front-rear direction that narrows the angle of the rear corner 3e in the cowl top panel 3 further proceeds, the cowl top panel 3 is deformed so that the entire cowl top panel 3 moves downward. When the windshield glass 2 is further deformed, the windshield glass 2 and the cowl top panel 3 are brought into close contact with each other, and the load F2 from the external object W is directly applied to the cowl top panel. Due to this load F2, the cowl top panel 3 is bent and deformed in the vehicle width direction around one of the first and second beads 3f, 3g. Thereafter, the cowl top panel 3 is deformed so as to move the whole thereof further downward.

  According to such deformation, one of the front-rear direction bending deformation that narrows the angle of the rear corner 3e in the cowl top panel 3 and one of the first and second beads 3f and 3g in the cowl top panel 3 The stress applied to the cowl top panel 3 is dispersed by the bending deformation in the vehicle width direction with the center at the center, so that the load can be efficiently absorbed by the cowl top panel 3 and its peripheral part. In particular, since the attachment body 8 at the upper end of the connecting bracket 6 is attached to the rear portion 3c of the cowl top panel 3 so as to straddle only the first bead 3f, the cowl top panel 3 is first attached to the second bead. After further bending deformation in the front-rear direction such that the rear corner portion 3e of the cowl top panel 3 is bent and deformed in the vehicle width direction about 3g, the cowl top panel 3 is moved to the first bead 3f. Will bend and deform in the vehicle width direction around the center. Therefore, the load can be efficiently absorbed by the stepwise deformation of the cowl top panel 3. Further, the first and second beads 3f and 3g projecting downward from the vehicle can increase the rigidity of the cowl top panel 3 with respect to loads other than the loads F1 and F2 from above. Furthermore, since the attachment body 8 at the upper end of the connection bracket 6 is attached to the rear portion 3c of the cowl top panel 3 so as to straddle the first bead 3f, the rigidity of the cowl top panel 3 can be further increased. By increasing the rigidity of the cowl top panel 3 in this way, vibration and noise can be reduced.

  According to the present embodiment, the mounting body 9 provided at the front end of the vehicle compartment side bracket 7 is attached to the rear portion 3c of the cowl top panel 3 so as to straddle the second bead 3g. 7, the bending deformation in the vehicle width direction around the second bead 3g in the cowl top panel 3 is suppressed, while the bending deformation in the vehicle width direction around the first bead 3f in the cowl top panel 3 is suppressed. Can be urged. Accordingly, the bending deformation of the cowl top panel 3 in the vehicle width direction can be adjusted so as to disperse the stress applied to the cowl top panel 3. Moreover, since the rear end part of the compartment side bracket 7 is attached to the instrument panel (not shown), the vibration and noise of the instrument panel that affect the merchantability of the vehicle can be efficiently reduced.

  According to the present embodiment, since the distance between the first and second beads 3f, 3g is shorter than the entire length of the second bead 3g, the distance between the first and second beads 3f, 3g is a cowl. The top panel 3 is adjusted so as to promote stepwise deformation, and the cowl top panel 3 and its peripheral portion can absorb the load efficiently.

  According to the present embodiment, since the first bead 3f extends between the upper end and the lower end of the rear portion 3c of the cowl top panel 3, the first bead 3f in the cowl top panel 3 is positioned in the vehicle width direction with the first bead 3f as the center. The bending deformation can be promoted, and the load can be absorbed efficiently by the cowl top panel 3 and its peripheral portion. Further, the rigidity of the rear portion 3c of the cowl top panel 3 can be efficiently increased by the first bead 3f, and vibration and noise can be reduced.

  Although the embodiments of the present invention have been described so far, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention.

  For example, as a first modification of the present invention, the front end of at least one of the first and second beads 3f and 3g is located at the front corner 3d or near the front corner 3d in the front 3a. It may be.

  As a second modification of the present invention, instead of spot welding, joining between members is performed by gas welding, arc welding, TIG welding, plasma welding, self-shielded arc welding, electroslag welding, electron beam welding, laser beam welding, Projection welding, seam welding, upset welding, flash welding, butt seam welding, brazing, brazing, friction stir welding, and the like may be used. Further, instead of spot welding, fastening members such as screws and bolts may be used.

DESCRIPTION OF SYMBOLS 1 Vehicle body front part 2 Windshield glass 3 Cowl top panel 3a Top part 3b Front part 3c Rear part 3d Front side corner part 3e Rear side corner part 3f First bead 3g Second bead 4 Cowl front panel 5 Dash side panel 6 Connecting bracket 7 Case side brackets 8, 9 Attachment body E Engine room C Case W External object F1, F2 Load

Claims (4)

A cowl top panel disposed along the vehicle width direction below the windshield glass in front of the vehicle body;
A cowl front panel disposed along the vehicle width direction below the cowl top panel so as to connect the dash side panels on both sides in the vehicle width direction of the vehicle body;
A cowl top panel peripheral structure comprising: a connecting bracket disposed along a vehicle vertical direction so as to connect the cowl top panel and the cowl front panel at a vehicle width direction center of the cowl top panel;
The cowl top panel has a substantially U-shaped cross section, and the cowl top panel has a front corner formed between a top portion and a front portion extending obliquely forward and downward from a front end of the top portion; and A rear corner is formed between the top and the rear part extending obliquely downward and rearward from the rear end of the top,
The front part of the cowl top panel is arranged so as to face the windshield glass,
Two beads projecting downward in the vehicle are formed in the vehicle width direction center portion of the cowl top panel, and the two beads are directed from the front corner portion or the vicinity thereof to the rear corner portion and the rear side. It is arranged along the vehicle front-rear direction so as to intersect the corner,
A peripheral structure of the cowl top panel, wherein an attachment body provided at an upper end of the connection bracket is attached to a rear portion of the cowl top panel so as to straddle one of the two beads. A vehicle compartment side bracket disposed along the vehicle front-rear direction so as to connect the cowl top panel and the vehicle cabin structure positioned behind the cowl top panel;
The peripheral structure of the cowl top panel according to claim 1, wherein an attachment body provided at a front end of the vehicle compartment side bracket is attached to a rear portion of the cowl top panel so as to straddle the other of the two beads. The two beads are oriented parallel to each other;
The peripheral structure of the cowl top panel according to claim 2, wherein a distance between the two beads is shorter than a total length of the other of the two beads.   The peripheral structure of the cowl top panel according to any one of claims 1 to 3, wherein one of the two beads extends between an upper end and a lower end of a rear portion of the cowl top panel.

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