JP2021066307A - Vehicle cowl part structure - Google Patents

Abstract

To inhibit vibration etc. transmitted to a cowl part from being transmitted to an interior of a passenger compartment.SOLUTION: A cowl part 7 has: a rear wall part 13 extending downward from a glass support part 11 supporting a front end part of windshield glass 1 and extending in a width direction; lower wall parts 15, 25 extending forward from a lower part of the rear wall part 13 and extending in the width direction; and a front wall part 21 extending upward from a front part of the lower wall part 25 and extending in the width direction. A brace 30 is provided between the front wall part 21 and the rear wall part 13. A front joint part 35 joined to the front wall part 21 is provided at a front part of the brace 30. A rear joint part 37 joined to a rear corner part 14 formed by the rear wall part 13 and the rear lower wall part 15 is provided at a rear part of the brace 30.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vehicle cowl structure.

The cowl portion located at the front portion of the vehicle (automobile) is required to improve the so-called NVH performance of suppressing noise, vibration, and harshness. Factors that reduce NVH performance include, for example, vibration transmitted from the engine and suspension being transmitted to the vehicle interior via the cowl portion. When the vibration or the like is transmitted, an unpleasant muffled sound is generated in the vehicle interior. Further, the vibration or the like may cause vibration of the windshield glass and vibration of the steering wheel.

As a method for solving this problem, for example, as disclosed in Patent Document 1, the bracket to which the wiper device is attached is a brace that connects the front wall and the rear wall of the cowl portion of the vehicle, thereby forming the cowl portion. A structure that improves the rigidity of the cowl is known. In this structure, the NVH performance is improved by suppressing the vibration and the like transmitted from the engine and the suspension from being transmitted to the vehicle interior.

JP-A-2018-201314

In a structure like the above example, the rear end of the brace is joined to the rear wall of the cowl. In such a configuration, the rigidity of the joint between the brace and the dash panel side (rear wall of the cowl portion) becomes low, so that the so-called NVH performance may not be sufficient. Further, in this configuration, the vibration of the cowl front panel is transmitted to the rear wall via the brace and the joint having low rigidity, and excites the vibration of the cowl top panel and the windshield glass. The vibration causes a loud muffled sound in the vehicle interior. Therefore, in the structure as in the above example, there is room for improvement in improving the NVH performance.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a vehicle cowl portion structure capable of suppressing transmission of vibration or the like transmitted to the cowl portion to the vehicle interior. It is to be.

The vehicle cowl portion structure according to the present invention for achieving the above object includes a glass support portion that supports the lower portion of the windshield glass and a glass support portion that supports the glass support portion and extends downward from the glass support portion. A rear wall portion extending in the vehicle width direction, a lower wall portion extending in the vehicle front from the lower part of the rear wall portion, extending in the vehicle width direction, and a vehicle extending upward from the front portion of the lower wall portion. It has a front wall portion extending in the width direction. In the vehicle cowl portion structure, a brace extending in the vehicle front-rear direction is provided between the front wall portion and the rear wall portion, and the front portion of the brace is a front-side joint joined to the front wall portion. A portion is provided, and the rear portion of the brace is provided with a rear joint portion to be joined to the rear corner portion formed by the rear wall portion and the lower wall portion.

According to the present invention, it is possible to suppress the vibration or the like transmitted to the cowl portion from being transmitted to the vehicle interior.

It is a perspective view which looked at one Embodiment of the vehicle cowl part structure which concerns on this invention from above the vehicle. It is a top view of the brace and the like of FIG. It is a side sectional view of the brace and the like of FIG. 2 seen from the side surface of the vehicle. It is a perspective view which shows the state which attached the wiper device to the cowl part of FIG. It is a schematic side view which shows the state which attached the wiper device to the brace and the like of FIG.

Hereinafter, an embodiment of the vehicle cowl structure according to the present invention will be described with reference to the drawings (FIGS. 1 to 5).

In the figure, the arrow Fr direction indicates the front in the vehicle front-rear direction. The "front (front end) and rear (rear end)" in the description of the embodiment correspond to the front and rear parts in the front-rear direction of the vehicle. Further, the arrows R and L indicate the right side and the left side in the vehicle width direction, respectively, and the "left and right" in the present embodiment correspond to the "left side" and the "right side" when the occupant faces the front of the vehicle. There is.

As shown in FIG. 1, the vehicle cowl portion structure of the present embodiment is the structure of the cowl portion 7 located below the windshield glass 1. As shown in FIGS. 1 and 4, the structure includes a dash panel 5 that separates the interior and exterior of the vehicle, a cowl top panel 10, a cowl front panel 20, a wiper device 40, and a brace 30 to which the wiper device 40 is attached. And have. Hereinafter, each member will be described. The cowl portion 7 of the present embodiment is mainly composed of a cowl top panel 10 and a cowl front panel 20.

As shown in FIG. 1, the cowl top panel 10 is a member provided on the upper part of the dash panel 5 and extending in the vehicle width direction. The cowl top panel 10 has a glass support portion 11, a rear wall portion 13, and a rear lower wall portion 15. The glass support portion 11 supports the lower end of the windshield glass 1. The rear wall portion 13 supports the glass support portion 11 and extends downward from the glass support portion 11 to the lower side of the vehicle. That is, the rear wall portion 13 faces the front of the vehicle and extends in the vehicle width direction, and constitutes the rear wall of the cowl portion 7. The rear lower wall portion 15 extends from the lower end of the rear wall portion 13 to the front of the vehicle and extends in the vehicle width direction. In this example, the rear lower wall portion 15 is inclined downward of the vehicle toward the front of the vehicle. Further, the rear corner portion 14 is formed by the lower end of the rear wall portion 13 and the rear end of the rear lower wall portion 15.

As shown in FIGS. 1 to 3, the cowl front panel 20 is a member arranged at intervals on the front side of the vehicle with respect to the rear wall portion 13 of the cowl top panel 10, and includes the front wall portion 21 and the cowl front panel 20. It has a front lower wall portion 25 and. The front lower wall portion 25 is joined to the front portion of the rear lower wall portion 15, extends from the front portion of the rear lower wall portion 15 to the front of the vehicle, and extends in the vehicle width direction. In this example, the front lower wall portion 25 is slightly inclined upward of the vehicle toward the front of the vehicle. The front wall portion 21 extends upward from the front portion of the front lower wall portion 25 and extends in the vehicle width direction. The front wall portion 21 constitutes the front wall of the cowl portion 7, and a flange 21a to which a cowl top garnish or the like (not shown) is attached is provided at the upper end of the front wall portion 21. Further, the front corner portion 22 is formed by the lower end of the front wall portion 21 and the front end of the front lower wall portion 25. In the present embodiment, the front lower wall portion 25 and the rear lower wall portion 15 form the bottom surface of the cowl portion 7.

The brace 30 is a member extending in the front-rear direction of the vehicle, and is arranged substantially at the center of the cowl portion 7 in the vehicle width direction. The brace 30 of this example is formed by bending a metal plate-shaped member. The brace 30 has a rear leg portion 34, a front leg portion 33, an intermediate portion 31, a rear joint portion 37, and a front joint portion 35.

As shown in FIGS. 1 and 3, the rear leg portions 34 are provided on both sides in the vehicle width direction at the rear portion of the brace 30, and extend so as to incline downward toward the vehicle rearward. In this example, the rear legs 34 are composed of plate-shaped side walls arranged at intervals in the vehicle width direction. The front leg portions 33 are provided on both sides of the front portion of the brace 30 in the vehicle width direction, and extend so as to be inclined downward toward the front of the vehicle. Like the rear legs 34, the front legs 33 are composed of plate-shaped side walls arranged at intervals in the vehicle width direction. The intermediate portion 31 extends in the front-rear direction of the vehicle so as to connect the rear leg portion 34 and the front leg portion 33.

As shown in FIGS. 1 to 3, the rear joint portion 37 is provided so as to project outward from the lower portion of the left and right rear leg portions 34, and is joined to the rear corner portion 14 of the cowl portion 7. In this example, the rear joint portion 37 is joined to the lower wall surface of the rear wall portion 13 forming the rear corner portion 14 and the bottom surface (upper surface) of the rear portion of the rear lower wall portion 15 by spot welding or the like. There is. By joining to two surfaces, the joining strength is improved.

As shown in FIG. 2, the front joint portion 35 is provided so as to project outward from the lower portion of the left and right front leg portions 33, and is joined to the front corner portion 22 of the cowl portion 7. In this example, the front joint portion 35 is the same as the rear joint portion 37, with the lower wall surface of the front wall portion 21 forming the front corner portion 22 and the bottom surface (upper surface) of the front portion of the front lower wall portion 25. Is joined by spot welding or the like.

By joining the rear joint portion 37 to the rear corner portion 14, it is possible to increase the rigidity of the portion where the brace 30 and the rear wall portion 13 are joined. As a result, the vibration transmitted from the front joint portion 35 can be received by the rear wall portion 13 and the rear lower wall portion 15, and the vibration transmitted to the cowl top panel 10 and the windshield glass 1 is suppressed. be able to. As a result, so-called NVH performance is improved.

Further, since the front joint portion 35 is joined to the front corner portion 22 having high rigidity, the brace 30 stretches the vibration transmitted from the front side of the vehicle of the cowl portion 7 in the front and rear direction of the vehicle in the cowl portion 7. You can receive it at. As a result, the rigidity of the brace 30 is improved, and vibration transmission to the cowl top panel 10 can be suppressed.

Further, as shown in FIGS. 4 and 5, the wiper device 40 of the present embodiment is arranged between the front wall portion 21 and the rear wall portion 13 of the cowl portion 7. The wiper device 40 includes a main body and a wiper motor 41 attached to the main body to drive the wiper. As shown in FIGS. 1 to 3, a mounting surface 32 to which the main body of the wiper device 40 is mounted is formed on the upper portion of the brace 30. The mounting surface 32 is provided above the intermediate portion 31 of the brace 30. The mounting surface 32 is provided with bolt holes, and the main body of the wiper device 40 is mounted on the mounting surface 32 by bolts or the like. Further, the wiper device 40 is attached to the cowl portion 7 with other brackets 43 and the like interposed therebetween.

As shown in FIG. 4, the wiper motor 41 is arranged so as to be offset to the right in the vehicle width direction with respect to the brace 30 in a state where the main body of the wiper device 40 is attached to the attachment surface 32. The portion where the front joint portion 35 and the front lower wall portion 25 are joined is arranged between the front end and the rear end of the wiper motor 41 in the vehicle width direction. That is, the portion of the front joint portion 35 that is joined to the front lower wall portion 25 is arranged within the range indicated by X in FIG. 5 in the vehicle front-rear direction.

The front joint portion 35 and the rear joint portion 37 are joined to the front lower wall portion 25 and the rear lower wall portion 15. Therefore, the front lower wall portion 25 and the rear lower wall portion 15 can receive a downward load acting on the cowl portion 7 from the wiper device 40 via the brace 30. In particular, the front lower wall portion 25 can receive a load acting downward in the substantially perpendicular direction of the surface. Here, the downward load includes, for example, a load that acts downward on the vehicle among the loads that are generated when the wiper device 40 is operating. Also included is the total weight of the wiper device 40.

When no load is received in the direction perpendicular to the surface, the brace 30 is greatly deformed. As a result, the brace 30 has a reduced effect of suppressing the vibration of the cowl front panel 20. In such a case, the effect of suppressing the vibration of the cowl top panel 10 and the windshield glass 1 is reduced, so that there is a high possibility that a muffled sound in the vehicle interior is generated. In the present embodiment, as described above, in the present embodiment, the cowl portion 7 can receive the downward load from the wiper device 40 in the substantially perpendicular direction to the surface, so that the vibration suppression effect is improved.

Further, the wiper motor 41 is a heavy object among the parts constituting the wiper device 40. By setting the positional relationship between the wiper motor 41 and the portion of the front joint portion 35 to be joined to the front lower wall portion 25 as described above, the support rigidity of the wiper motor 41 is improved. Therefore, the cowl portion 7 of the present embodiment can secure the rigidity even if the wiper device 40 is attached.

Here, the intermediate portion 31 will be described. The intermediate portion 31 is inclined downward and extends toward the front of the vehicle. The intermediate portion 31 has the above-mentioned mounting surface 32 and left and right side walls extending downward from the left and right ends of the mounting surface 32. The left and right side walls are connected to the left and right front leg portions 33 and the left and right rear leg portions 34. The lower ends of the left and right side walls are arranged at intervals above the vehicle with respect to the front lower wall portion 25 and the rear lower wall portion 15. The mounting surface 32 and the lower ends of the left and right side walls of the intermediate portion 31 are inclined downward of the vehicle toward the front of the vehicle.

Since the brace 30 is inclined, the front joint portion 35 and the rear joint portion 37 of the brace 30 respectively have the front wall portion 21 and the rear wall portion in response to the load input from the wiper motor 41 to the brace 30 below the vehicle. 13 can be pressed efficiently. As a result, the brace 30 can be effectively stretched between the front wall portion 21 and the rear wall portion 13, and the rigidity of the brace 30 is improved. As a result, the above-mentioned vibration transmission is suppressed.

Further, the upper portion of the front joint portion 35 and the lower portion of the rear joint portion 37 of the present embodiment are arranged so as to overlap each other in the front-rear direction of the vehicle. That is, as shown in FIGS. 3 and 5, the upper end of the front joint portion 35 is located on the upper side of the vehicle with respect to the lower end of the rear joint portion 37. The entire region of the front joint 35 in the vehicle vertical direction may be arranged so as to overlap the rear joint 37 in the vehicle front-rear direction. Further, the entire region of the rear joint portion 37 in the vehicle vertical direction may be arranged so as to overlap the front joint portion 35 in the front-rear direction of the vehicle.

For example, when the front joint 35 and the rear joint 37 of the brace 30 are arranged at intervals in the vertical direction of the vehicle, the length in the vertical direction of the vehicle between the front joint 35 and the rear joint 37 is long. As the length increases, the bending moment acting on the brace 30 in the vehicle vertical direction increases due to the vibration of the cowl front panel 20 in the vehicle front-rear direction. As the bending moment increases, the load acting on the brace 30 and the cowl top panel 10 also increases. In such a case, the effect of suppressing the vibration transmitted from the cowl front panel 20 is reduced, the vibration of the cowl top panel 10 and the windshield glass 1 is excited, and a muffled sound in the vehicle interior is generated.

On the other hand, in the present embodiment, the front joint 35 and the rear joint 37 are formed by setting the relative positions of the front joint 35 and the rear joint 37 in the vehicle vertical direction as described above. The offset amount of is set small. When the offset amount becomes small, the moment of the brace 30 becomes small, so that the load acting on the front joint portion 35 and the rear joint portion 37 also becomes small, and as a result, the deformation of the brace 30 can be suppressed.

The description of the present embodiment is an example for explaining the present invention, and does not limit the invention described in the claims. Further, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.

For example, in the present embodiment, the front joint portion 35 is joined to the front corner portion 22, but the present invention is not limited to this. For example, the front joint portion 35 may be joined to the intermediate portion of the front wall portion 21 in the vertical direction of the vehicle. Further, in the present embodiment, the brace 30 is arranged substantially in the center in the vehicle width direction, but the present invention is not limited to this. It suffices if it is arranged in the middle part in the vehicle width direction.

Further, in the present embodiment, the bottom surface of the cowl portion 7 is composed of the rear lower wall portion 15 of the cowl top panel 10 and the front lower wall portion 25 of the cowl front panel 20, but the present invention is not limited to this. It may be composed of one of the wall portion 25 and the rear lower wall portion 15. In this case, the front portion of the rear lower wall portion 15 may be joined to the lower portion of the front wall portion 21, and the rear portion of the front lower wall portion 25 may be joined to the lower portion of the rear wall portion 13.

1 Windshield glass 5 Dash panel 7 Cowl part 10 Cowl top panel 11 Glass support part 13 Rear wall part 14 Rear corner part 15 Rear lower wall part 20 Cowl front panel 21 Front wall part 21a Flange 22 Front corner part 25 Front lower wall part 30 Brace 31 Intermediate part 32 Mounting surface 33 Front leg part 34 Rear leg part 35 Front side joint part 37 Rear side joint part 40 Wiper device 41 Wiper motor 43 Bracket

Claims (5)

A glass support portion that supports the lower portion of the windshield glass, a rear wall portion that supports the glass support portion and extends downward from the glass support portion toward the vehicle width, and a rear wall portion that extends in the vehicle width direction. It has a lower wall portion extending from the lower portion to the front of the vehicle and extending in the vehicle width direction, and a front wall portion extending from the front portion of the lower wall portion to the upper side of the vehicle and extending in the vehicle width direction. In the vehicle cowl structure
A brace extending in the front-rear direction of the vehicle is provided between the front wall portion and the rear wall portion.
The front portion of the brace is provided with a front joint portion to be joined to the front wall portion.
The vehicle cowl portion structure is characterized in that the rear portion of the brace is provided with a rear joint portion to be joined to the rear corner portion formed by the rear wall portion and the lower wall portion. The vehicle cowl portion structure according to claim 1, wherein the front side joint portion is joined to a front corner portion formed by the front wall portion and the lower wall portion. A wiper device having a wiper motor and a main body portion to which the wiper motor is attached is provided between the front wall portion and the rear wall portion.
A mounting surface to which the main body is mounted is formed on the upper portion of the brace.
In a state where the main body of the wiper device is attached to the mounting surface, the wiper motor is arranged so as to be offset in the vehicle width direction with respect to the brace, and the front joint portion and the lower wall portion are joined. The vehicle cowl portion structure according to claim 2, wherein at least a part of the portion is arranged between the front end and the rear end of the wiper motor in a vehicle width direction view. On both sides of the rear portion of the brace in the vehicle width direction, rear leg portions that incline downward to the vehicle toward the rear of the vehicle are provided, and the rear joint portion is provided at the lower portion of the rear leg portion.
On both sides of the front portion of the brace in the vehicle width direction, front leg portions that incline downward to the vehicle toward the front of the vehicle are provided, and the front joint portion is provided at the lower portion of the front leg portion.
An intermediate portion is provided between the rear leg portion and the front leg portion so as to incline downward from the vehicle toward the front of the vehicle.
The vehicle cowl portion structure according to claim 3, wherein the mounting surface is located above the intermediate portion. Claims 1 to 2, wherein at least a part of the front joint portion of the brace and at least a part of the rear joint portion are arranged so as to overlap each other in the front-rear direction of the vehicle. The vehicle cowl portion structure according to any one of 4.

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