JP2013082245A - Cowl part structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cowl part structure of a vehicle that attempts improvement of riding comfort capability, an anti-vibration measure of a vehicle body, and a noise countermeasure by controlling rocking deformation by sectional collapse in an open cross-section part by a reinforcing body, and aiming at vibration damping effectively by a vibration damping member, without causing weight increase in the vehicle body, while securing pedestrian protection performance.SOLUTION: A cowl part structure includes a reinforcing body 30 that ties a cowl upper member 9 and a cowl lower member 7. The reinforcing body 30 includes: a first reinforcement part 31 that is tied with the cowl upper member 9, and extends to the cowl lower member 7 direction and a second reinforcement part 32 that is tied with the cowl lower member 7, and extends to the cowl upper member 9 direction. The first reinforcement part 31 and the second reinforcement part 32 has an overlapping part 33, and the first reinforcement part 31 and the second reinforcement part 32 are united at least a part of the overlapping part 33 through a vibration damping member 34.

Description

  The present invention relates to a vehicle cowl structure that extends in the vehicle width direction of the vehicle and has an open cross section that is opened forward by a cowl upper member such as a cowl panel and a cowl lower member such as a dash upper panel. About.

  In general, when a collision object such as a pedestrian collides with the front part of the vehicle, it is known that a cowl box structure including a cowl panel is formed as a so-called open cowl structure in which an upper part is opened in order to reduce the impact. ing.

However, when the above-described open cowl structure is employed, the opening formed by the dash upper panel on the upper side of the dash lower panel and the cowl panel is oscillated and deformed, and the front window is joined to the cowl panel by means such as adhesion. There is a problem that the vibration of the member (front window glass) is increased, and a booming sound (a sound that presses the ear as a feeling in the 20 to 300 Hz _Z band) becomes uncomfortable for passengers in the passenger compartment. It was.

As a conventional technique for solving such a problem, a structure disclosed in Patent Document 1 is known.
That is, the one disclosed in Patent Document 1 is provided with a support bracket that supports a vehicle width direction intermediate portion of a cowl panel extending in the vehicle width direction of the vehicle to a corresponding portion of the dash upper panel, and the above-described cowl is supported by this support bracket. The vibration of the cowl panel is suppressed while suppressing the rocking deformation of the panel.
In the conventional structure disclosed in Patent Document 1, the vibration of the front window member can be reduced to some extent, but it is still not sufficient.
In the structure disclosed in Patent Document 1, in order to further improve the reduction of vibration, it is conceivable to increase the thickness of the support bracket. In this case, however, not only the weight of the vehicle body is increased. There was a problem that the pedestrian protection performance deteriorated.

JP 2011-37288 A

  Therefore, the present invention provides a reinforcing body that connects the cowl upper member and the cowl lower member, the reinforcing body extends from the cowl upper member to the cowl lower member side, and the cowl lower member to the cowl upper member side. A second reinforcing portion that extends, and a vibration damping member is interposed in at least a part of the overlapped portion of the first and second reinforcing portions, so that the swinging deformation caused by the cross-sectional collapse of the open cross-sectional portion is caused by the reinforcing body. In addition to suppressing the vibration, the vibration damping member can effectively attenuate the vibration without causing an increase in the weight of the vehicle body, while ensuring the pedestrian protection performance, improving the riding comfort performance, An object of the present invention is to provide a vehicle cowl structure capable of taking measures against noise.

A vehicle cowl structure according to the present invention is a vehicle cowl structure that extends in the vehicle width direction of the vehicle and has an open cross section that is opened forward by the cowl upper member and the cowl lower member. A reinforcing body that connects the cowl upper member and the cowl lower member, the reinforcing body being coupled to the cowl upper member and extending in the direction of the cowl lower member; and to the cowl lower member. A second reinforcing part extending in the direction of the cowl upper member, the first reinforcing part and the second reinforcing part have an overlapping part, and the first reinforcing part and the second reinforcing part are At least a part of the overlapping portion is coupled via a vibration damping member.
The above-described cowl upper member may be set on the cowl panel. Further, the above-described cowl lower member may be set to a dash upper panel, a cowl front panel, or a cowl cross member.
Further, as the above-described vibration damping member, a viscoelastic member having a loss coefficient (20 ° C., 30H _Z ) of 0.2 or more is desirable.

According to the said structure, the rocking | fluctuation deformation by the cross-sectional collapse of an open cross-section part can be suppressed by the reinforcement body which connects a cowl upper member and a cowl lower member.
Further, vibration attenuation can be effectively achieved by the vibration damping member interposed in at least a part of the overlapping portion of the first reinforcing portion and the second reinforcing portion without increasing the plate thickness of the reinforcing body. . Therefore, it is possible to improve riding comfort performance, take measures against vibrations of the vehicle body, and take measures against noise without increasing the weight of the vehicle body and ensuring pedestrian protection performance.
Further, since the first reinforcing part is coupled to the cowl upper member and the second reinforcing part is coupled to the cowl lower member, the first and second reinforcing parts are attached to the cowl structure. Becomes easy.

  The vehicle cowl structure according to the present invention is also a vehicle cowl structure that extends in the vehicle width direction of the vehicle and has an open cross-section formed by a cowl upper member and a cowl lower member that opens forward of the vehicle. A first reinforcing member formed by bending at least a part of a front end portion of the cowl upper member toward the cowl lower member, the reinforcing member connecting the cowl upper member and the cowl lower member. And a second reinforcing part coupled to the cowl lower member and extending in the direction of the cowl upper member, the first reinforcing part and the second reinforcing part having an overlapping part, and the first reinforcing part The reinforcing part and the second reinforcing part are coupled via a vibration damping member in at least a part of the overlapped part.

According to the said structure, the rocking | fluctuation deformation by the cross-sectional collapse of an open cross-section part can be suppressed by the reinforcement body which connects a cowl upper member and a cowl lower member.
Further, vibration attenuation can be effectively achieved by the vibration damping member interposed in at least a part of the overlapping portion of the first reinforcing portion and the second reinforcing portion without increasing the plate thickness of the reinforcing body. . Therefore, it is possible to improve riding comfort performance, take measures against vibrations of the vehicle body, and take measures against noise without increasing the weight of the vehicle body and ensuring pedestrian protection performance.
Furthermore, since the first reinforcing portion is integrally bent with the cowl upper member, the number of parts can be reduced.

  The vehicle cowl structure according to the present invention is a vehicle cowl structure that further extends in the vehicle width direction of the vehicle and is formed with an open cross section that opens forward of the vehicle by a cowl upper member and a cowl lower member. A reinforcing body that connects the cowl upper member and the cowl lower member, the reinforcing body being coupled to the cowl upper member and extending in the direction of the cowl lower member; and at least one of the cowl lower member A second reinforcing portion formed by bending a part thereof toward the cowl upper member, wherein the first reinforcing portion and the second reinforcing portion have an overlapping portion, and the first reinforcing portion The second reinforcing portion is coupled to at least a part of the overlapping portion via a vibration damping member.

According to the said structure, the rocking | fluctuation deformation by the cross-sectional collapse of an open cross-section part can be suppressed by the reinforcement body which connects a cowl upper member and a cowl lower member.
Further, vibration attenuation can be effectively achieved by the vibration damping member interposed in at least a part of the overlapping portion of the first reinforcing portion and the second reinforcing portion without increasing the plate thickness of the reinforcing body. . Therefore, it is possible to improve riding comfort performance, take measures against vibrations of the vehicle body, and take measures against noise without increasing the weight of the vehicle body and ensuring pedestrian protection performance.
Further, since the second reinforcing portion is integrally bent with the cowl lower member, the number of parts can be reduced.

In one embodiment of the present invention, the overlapping portion is configured to be overlapped in the longitudinal direction of the vehicle.
According to the above configuration, vibration damping can be effectively achieved by the vibration damping member interposed in at least a part of the overlapping portion that is overlapped in the front-rear direction of the vehicle.

In one embodiment of the present invention, the overlapping portion is configured to overlap in the vehicle front-rear direction, and a coupling portion between the cowl upper member and the first reinforcing portion is provided in the vicinity of the front end of the opening. It is a thing.
According to the above configuration, in the opening of the cowl upper member and the cowl lower member, the vicinity of the front end of the opening has a larger relative displacement with respect to the rear part of the opening, and the portion where the relative displacement is larger (near the front end of the opening) ), A coupling portion between the cowl upper member and the first reinforcing portion is provided, and a vibration damping member is interposed in at least a part of the overlapping portion where the first reinforcing portion and the second reinforcing portion are overlapped. Therefore, the vibration damping effect can be further enhanced.

In one embodiment of the present invention, the overlapping portion is configured to be overlapped in the vehicle width direction.
According to the above configuration, the vibration damping can be effectively achieved by the vibration damping member interposed in at least a part of the overlapping portion that is overlapped in the vehicle width direction.

In one embodiment of the present invention, the cowl upper member is a cowl panel that extends forward from the upper portion of the dash upper panel and supports the lower end portion of the front window member.
According to the above configuration, since the cowl upper member is set to the cowl panel, the reinforcing member that connects the cowl panel and the cowl lower member can suppress the rocking deformation due to the collapse of the cross section of the open cross section.

In one embodiment of the present invention, the overlapping portion is configured to be overlapped in the vertical direction of the vehicle.
According to the above configuration, vibration damping can be effectively achieved by the vibration damping member interposed in at least a part of the overlapping portion that is overlapped in the vertical direction of the vehicle.

In one embodiment of the present invention, the cowl lower member is arranged in the vehicle width direction between the dash upper panel, a cowl front panel extending forward from the lower portion of the dash upper panel, or the cowl front panel. It is a cowl cross member that forms a closed cross section that extends.
According to the above configuration, since the cowl lower member is set to the dash upper panel, the cowl front panel, or the cowl cross member, the reinforcing member that connects the cowl upper member and the dash upper panel, the cowl front panel, or the cowl cross member, Oscillating deformation due to the collapse of the cross section of the open cross section can be suppressed.

  According to the present invention, the reinforcing body that connects the cowl upper member and the cowl lower member is provided, the reinforcing body extends from the cowl upper member to the cowl lower member side, and the cowl lower member to the cowl upper member side. Since the vibration damping member is interposed in at least a part of the overlapping portion of the first and second reinforcing portions, the swinging deformation due to the collapse of the cross section of the open cross-sectional portion is suppressed by the reinforcing body. In addition, the vibration damping member can effectively attenuate the vibration without causing an increase in the weight of the vehicle body, and while ensuring the pedestrian protection performance, improving the riding comfort performance, the vehicle body vibration countermeasures and the noise. There is an effect that measures can be taken.

The perspective view which shows the cowl part structure of the vehicle of this invention Side view of essential parts of FIG. Enlarged perspective view of reinforcement Characteristic chart showing characteristics of panel acceleration with respect to frequency The perspective view which shows the other Example of the cowl part structure of a vehicle Side view of essential parts of FIG. Enlarged perspective view of reinforcement Characteristic chart showing characteristics of panel acceleration with respect to frequency The perspective view which shows other Example of the cowl part structure of a vehicle Side view of essential parts of FIG. Enlarged perspective view of reinforcement Characteristic chart showing characteristics of panel acceleration with respect to frequency Explanatory drawing which shows the some joint position with respect to the opening of a reinforcement FIG. 13 is a characteristic diagram showing point inertances at a plurality of coupling positions in FIG. The perspective view which shows other Example of the cowl part structure of a vehicle The perspective view which shows other Example of the cowl part structure of a vehicle The other Example of a reinforcement body is shown, (a) is a side view before vibration damping member interposition, (b) is a side view after vibration attenuation member intervention The other Example of a reinforcement body is shown, (a) is a side view before vibration damping member interposition, (b) is a side view after vibration attenuation member interposition Side view showing still another embodiment of the cowl structure of the vehicle Side view showing still another embodiment of the cowl structure of the vehicle Side view showing still another embodiment of the cowl structure of the vehicle

  While suppressing the swing deformation due to the collapse of the cross section of the open cross section with the reinforcing body, the vibration damping member effectively attenuates the vibration, without causing an increase in the weight of the vehicle body, while ensuring the pedestrian protection performance, A vehicle that extends in the vehicle width direction of the vehicle for the purpose of improving riding comfort performance, measures against vibrations of the vehicle body, and noise measures, and has an open cross section that is opened forward by the cowl upper member and the cowl lower member In the cowl part structure, a reinforcing body that connects the cowl upper member and the cowl lower member is provided, and the reinforcing body is coupled to the cowl upper member and extends in the direction of the cowl lower member; and A second reinforcing portion coupled to the cowl lower member and extending in the direction of the cowl upper member, wherein the first reinforcing portion and the second reinforcing portion have an overlapping portion, and the first reinforcing portion and the above Second reinforcement Bets are realized by configurations that are coupled via a vibration damping member at least a part of the mating portion overlapped above.

An embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing a structure of a cowl part of a vehicle, FIG. 2 is a side view of a main part of FIG. 1, and FIG. 3 is an enlarged perspective view of a reinforcing body. In the figure, arrow F indicates the front of the vehicle.
1 and 2, the dash lower panel 2 is joined and fixed between the left and right hinge pillars 1 and 1 (only the hinge pillar on the right side of the vehicle is shown in the drawing), and the engine room 3 and the vehicle behind the dash lower panel 2 are joined. The chamber 4 is partitioned in the front-rear direction.
The front pillar 5 is joined and fixed to the upper portion of the above-described hinge pillar 1 so that the front portion is low and the rear portion is high.
Furthermore, the floor panel 6 is bonded and fixed to the lower rear end portion of the dash lower panel 2 described above. The floor panel 6 extends substantially horizontally toward the rear and constitutes the bottom surface of the passenger compartment 4. The floor panel 6 protrudes into the passenger compartment 4 at the center in the vehicle width direction, and A tunnel portion extending in the front-rear direction is integrally formed.

As shown in FIGS. 1 and 2, a dash upper panel 7 is joined and fixed to the upper bent portion 2 a of the dash lower panel 2 described above. A rear end portion of a cowl panel 9 that supports an inclined lower end portion of a front window glass 8 as a front window member is joined and fixed to the upper portion of the dash upper panel 7.
In other words, the cowl portion structure of the vehicle of this embodiment extends in the vehicle width direction of the vehicle, and opens to the front of the vehicle by the cowl panel 9 as the cowl upper member and the dash upper panel 7 as the cowl lower member. An open section 10 (hereinafter referred to as a cowl opening) is formed.
The front end 7a of the above-described dash upper panel 7 is provided with a cowl front panel 11 that is joined to the rear end 11a and extends forward. Between the front vertical wall 11b of the cowl front panel 11 and in the vehicle width direction. A cowl cross member 13 is attached to the front upper side of the cowl front panel 11 so as to form an extended closed section 12.
The dash upper panel 7, the cowl panel 9, the cowl front panel 11, and the cowl cross member 13 form a cowl box 14 having a so-called open cowl structure that extends in the vehicle width direction.

Incidentally, as shown in FIG. 1, a suspension tower 15 is disposed at a position spaced forward from the dash lower panel 2 described above. An apron reinforcement 16 extending forward from the upper part of the hinge pillar 1 is provided outside the suspension tower 15 in the upper vehicle width direction.
The apron reinforcement 16 is a vehicle body rigid member that includes an apron rain outer and an apron rain inner. A front side frame 17 is connected to the inside of the suspension tower 15 in the lower vehicle width direction, and the front side frame 17 is provided substantially in parallel with the apron reinforcement 16 described above.
The front side frame 17 described above is a vehicle body rigid member that extends in the front-rear direction of the vehicle on both side portions of the engine room 3. The front side frame 17 is connected to the lower portion of the suspension tower 15 and has a rear end portion. Is curved downward and connected to the front portion of the floor frame 18.
In FIG. 2, 19 is a bonnet that covers the upper part of the engine room 3 so as to be openable and closable, and 20 is a bonnet reinforcement provided integrally on the lower surface of the bonnet 19.

  As shown in FIGS. 1 and 2, a dash upper panel 7 that forms the above-described cowl opening 10, and a cowl panel that extends forward from the upper portion of the dash upper panel 7 and supports the lower end of the front window glass 8. 9 is formed by joining and fixing the rear end portion 7b of the dash upper panel 7 and the rear end portion 9b of the cowl panel 9. The cowl panel 9 as a cowl upper member and the dash upper member as a cowl lower member are formed. A reinforcing body 30 (so-called V-shaped gusset) is provided to connect the panel 7 to the substantially vertical direction.

  As shown in FIGS. 2 and 3, the reinforcing body 30 is formed of an iron plate, is coupled to the cowl panel 9 and extends in the direction of the dash upper panel 7 (that is, downward), and a dash upper. A second reinforcing portion 32 coupled to the panel 7 and extending in the direction of the cowl panel 9 (that is, upward), and the first reinforcing portion 31 and the second reinforcing portion 32 have an overlap portion 33 as an overlapping portion. In addition, the first reinforcing portion 31 and the second reinforcing portion 32 are coupled to each other via a vibration damping member 34 in at least a part of the overlap portion 33 (almost all in this embodiment).

As shown in FIGS. 2 and 3, in this embodiment, the reinforcing body 30 is formed in a substantially inverted triangular shape in a side view, and the first reinforcing portion 31 located on the upper side is spaced apart in the front-rear direction at the upper portion thereof. Two bent pieces 31a and 31b are integrally formed, and the second reinforcing portion 32 located on the lower side is integrally formed with one bent piece 32a at the lower portion thereof. The two bent pieces 31a and 31b are joined and fixed to the upper lower surface (the lower surface on the free end side) of the cowl panel 9 by spot welding means, and one bent piece 32a of the second reinforcing portion 32 is arranged in front of the dash upper panel 7. It is bonded and fixed by spot welding means to the front surface of the slant portion having a low rear height.
The bent piece 32a is coupled to the front surface of the slant portion so as to be located on the rear side of the dash lower panel 2.
Further, as shown in FIG. 1, the above-described reinforcing body 30 is a position that divides the length of the front window glass 8 in the vehicle width direction into approximately two equal parts, that is, an intermediate part in the vehicle width direction of the cowl opening 10. In the vehicle width direction center part, the 1st reinforcement part 31 and the 2nd reinforcement part 32 are provided so that it may overlap in a vehicle width direction.
As the above-described vibration damping member 34, a viscoelastic member having a loss coefficient (20 ° C., 30 H _Z ) of 1.0 or more is used, and this viscoelastic member is bonded and fixed to the overlap portion 33.

  FIG. 4 shows a product of this embodiment in which a vibration damping member 34 is interposed in an overlap portion 33 of a reinforcing member 30 having a two-part structure, and a comparative example having a non-split structure reinforcing body and using no vibration damping member. And the result of having performed the simulation analysis with respect to each cowl part structure with the conventional product which does not have a reinforcement body itself is shown with the characteristic view.

  As an analysis evaluation method, the front suspension mounting portion as a vibration position is vibrated, and the vibration acceleration of each point of the front window glass 8 that is in contact with the cavity in the passenger compartment 4 is tabulated. In FIG. 4, the acceleration of the nodes of the analysis model is shown as a sum of squares.

Figure 4 takes the frequency band of 47.5～82.5H _Z in the horizontal axis, which was taken panels acceleration on the vertical axis, the characteristic shown in FIG. In a is that of the Example product, with b and the characteristic shown those comparison example, there is the characteristic indicated by c is conventional, these characteristics a, b, in c, the maximum peak value among the 47.5~82.5H _Z P1, P2 , P3 is evaluated according to the magnitude.
In comparison with the peak value P3 in the characteristic c of the conventional product that does not have the reinforcing body itself, it is recognized that the peak value P2 is reduced in the characteristic b of the comparative product having the reinforcing body. On the other hand, it is recognized that the peak value P1 is further lowered in the characteristic a of the product of this embodiment, and the panel acceleration level (vibration level) is sufficiently lowered in the product of this embodiment, and the vibration damping effect becomes the highest. It became clear.

  As described above, the cowl structure of the vehicle according to the first embodiment shown in FIGS. 1 to 3 extends in the vehicle width direction of the vehicle, and includes a cowl upper member (see the cowl panel 9) and a cowl lower member (dash upper panel). 7) in which the open cross section (see the cowl opening 10) that opens in front of the vehicle is formed, the cowl upper member (the cowl panel 9) and the cowl lower member (the dash upper panel). 7), a first reinforcing portion 31 coupled to the cowl upper member (cowl panel 9) and extending in the direction of the cowl lower member (dash upper panel 7); A second reinforcing part 32 coupled to the cowl lower member (dash upper panel 7) and extending in the direction of the cowl upper member (cowl panel 9), the first reinforcing part 31 and the first reinforcing part The reinforcing portion 32 has an overlapping portion (overlap portion 33), and the first reinforcing portion 31 and the second reinforcing portion 32 are at least part of the overlapping portion (overlap portion 33) (this implementation). In the example, substantially all) are coupled via the vibration damping member 34 (see FIG. 2).

According to this configuration, the reinforcing body 30 that connects the cowl upper member (the cowl panel 9) and the cowl lower member (the dash upper panel 7) suppresses the rocking deformation due to the cross-sectional collapse of the open cross-section (the cowl opening 10). can do.
Further, without increasing the plate thickness of the reinforcing body 30, the vibration damping member 34 interposed in at least a part of the overlapping portion (overlap portion 33) of the first reinforcing portion 31 and the second reinforcing portion 32, Vibration attenuation can be achieved effectively. Therefore, it is possible to improve riding comfort performance, take measures against vibrations of the vehicle body, and take measures against noise without increasing the weight of the vehicle body and ensuring pedestrian protection performance.
Further, the first reinforcing portion 31 is coupled to the cowl upper member (the cowl panel 9), and the second reinforcing portion 32 is coupled to the cowl lower member (the dash upper panel 7). The first and second reinforcing portions 31 and 32 can be easily attached.
Further, the overlapping portion (overlap portion 33) is configured to be overlapped in the vehicle width direction (see FIG. 3).

According to this configuration, the vibration damping can be effectively achieved by the vibration damping member 34 interposed in at least a part of the overlapping portion (overlap portion 33) overlapped in the vehicle width direction.
Further, the cowl upper member is a cowl panel 9 that extends forward from the upper portion of the dash upper panel 7 and supports the lower end portion of the front window member (front window glass 8).

According to this configuration, since the cowl upper member is set to the cowl panel 9, the reinforcing section 30 that connects the cowl panel 9 and the cowl lower member (see the dash upper panel 7) allows the open cross section (the cowl opening 10) to be Oscillating deformation due to cross-sectional collapse can be suppressed.
In addition, the cowl lower member is closed between the dash upper panel 7 or the cowl front panel 11 extending forward from the lower portion of the dash upper panel 7 or the cowl front panel 11 in the vehicle width direction. A cowl cross member 13 forming a cross section 12 (in the first embodiment, a dash upper panel 7).

According to this configuration, since the cowl lower member is set to the dash upper panel 7, the cowl front panel 11 or the cowl cross member 13, the cowl upper member (the cowl panel 9), the dash upper panel 7, the cowl front panel 11 or By the reinforcing body 30 that connects the cowl cross member 13, it is possible to suppress the rocking deformation caused by the collapse of the cross section of the open cross section (the cowl opening 10).
In the illustrated embodiment, the first reinforcing portion 31 is located on the left side in the vehicle width direction, and the second reinforcing portion 32 is located on the right side in the vehicle width direction (see FIG. 3). Of course, it may be reversed.

  5 to 7 show a second embodiment of the cowl structure of the vehicle, FIG. 5 is a perspective view showing the cowl structure, FIG. 6 is a side view of the main part of FIG. 5, and FIG. It is. 5 to 7, the same parts as those in the previous figures are denoted by the same reference numerals, and detailed description thereof is omitted.

In the second embodiment, an existing wiper bracket 42 (specifically, a wiper mounting bracket) is used as the second reinforcing portion.
That is, a reinforcing body 40 that connects a cowl panel 9 as a cowl upper member and a cowl front panel 11 as a cowl lower member is provided.
The reinforcing body 40 is coupled to the front end portion of the cowl panel 9 by spot welding means or the like and extends in the direction of the cowl front panel 11, more specifically, a first reinforcing portion 41 that extends forward and downward toward the wiper bracket 42. And a wiper bracket 42 (second reinforcing portion) coupled to the cowl front panel 11 and extending in the direction of the cowl panel 9.
The arrangement position of the first reinforcing portion 41 is set to an intermediate position in the vehicle width direction of the cowl opening 10 in order to correspond to the existing wiper bracket 42.

As shown in an enlarged perspective view in FIG. 7, the wiper bracket 42 serving as the second reinforcing portion includes left and right side walls 42a, 42a and a connecting wall 42b for connecting the upper portions of the side walls 42a, 42a in the vehicle width direction. An extension portion 42c extending from the upper rear portion of the connecting wall 42b toward the front end side of the cowl panel 9, and bent pieces 42d and 42e formed at the lower portions of the left and right side walls 42a and 42a are integrally formed. It is.
The plurality of bent pieces 42d and 42e located at the lower portion of the wiper bracket 42 are coupled to the cowl front panel 11 by spot welding or the like as shown in FIG.

As shown in FIGS. 6 and 7, the front portion of the first reinforcing portion 41 and the rear portion of the extension portion 42 c of the wiper bracket 42 are overlapped to form an overlap portion 43. And the extension portion 42c of the wiper bracket 42 are coupled to each other via a vibration damping member 44 in at least a part of the overlap portion 43 (substantially all in this embodiment).
As the vibration damping member 44, a viscoelastic member having a loss coefficient (20 ° C., 30 H _Z ) of 1.0 or more is used, and the viscoelastic member is bonded and fixed to the overlap portion 43.

  FIG. 8 shows a product of this embodiment in which a vibration damping member 44 is interposed in an overlap portion 43 of a reinforcing body 40 having a two-part structure, and a comparative example product having a non-partition structure reinforcing body and using no vibration damping member. And the result of having performed the simulation analysis with respect to each cowl part structure with the conventional product which does not have a reinforcement body itself is shown with the characteristic view.

  As an analysis evaluation method, as in the first embodiment, the front suspension mounting portion serving as the vibration position is vibrated, and vibrations of each point of the front window glass 8 that is in contact with the cavity in the passenger compartment 4 are performed. FIG. 8 shows the sum of the accelerations of the nodes of the analysis model as a sum of squares.

Figure 8 takes the frequency band of 47.5～82.5H _Z in the horizontal axis, which was taken panels acceleration on the vertical axis, characteristic in FIG indicated a is that of the Example product, with b and the characteristic shown those comparison example, there is the characteristic indicated by c is conventional, these characteristics a, b, in c, the maximum peak value among the 47.5~82.5H _Z P11, P12 , P13 is used for evaluation.
It is recognized that the peak value P12 is lower in the characteristic b of the comparative product having the reinforcing body than the peak value P13 in the characteristic c of the conventional product having no reinforcing body itself. On the other hand, it is recognized that the peak value P11 is further reduced in the characteristic a of the product of this example, and it is clear that the panel acceleration level is sufficiently lowered and the vibration damping effect is the highest in this product. became.

  As described above, the cowl structure of the vehicle according to the second embodiment shown in FIGS. 5 to 7 extends in the vehicle width direction of the vehicle, and includes a cowl upper member (see the cowl panel 9) and a cowl lower member (a cowl front panel). 11) and a cowl structure of the vehicle in which an open cross section (see the cowl opening 10) that opens forward of the vehicle is formed, the cowl upper member (the cowl panel 9) and the cowl lower member (the cowl front panel). 11), and a first reinforcing portion 41 coupled to the cowl upper member (cowl panel 9) and extending in the direction of the cowl lower member (cowl front panel 11); A second reinforcing portion (see wiper bracket 42) coupled to the cowl lower member (the cowl front panel 11) and extending in the direction of the cowl upper member (the cowl panel 9). The first reinforcing portion 41 and the second reinforcing portion (wiper bracket 42) have an overlapping portion (overlap portion 43), and the first reinforcing portion 41 and the second reinforcing portion (wiper bracket 42). ) Are coupled via a vibration damping member 44 in at least a part of the overlapping portion (overlap portion 43) (see FIG. 6).

According to this configuration, the reinforcing member 40 that connects the cowl upper member (the cowl panel 9) and the cowl lower member (the cowl front panel 11) suppresses the rocking deformation due to the cross-sectional collapse of the open cross-section (the cowl opening 10). can do.
Further, the vibration damping is interposed in at least a part of the overlapping portion (overlap portion 43) of the first reinforcing portion 41 and the second reinforcing portion (wiper bracket 42) without increasing the plate thickness of the reinforcing body 40. The member 44 can effectively reduce vibration. Therefore, it is possible to improve riding comfort performance, take measures against vibrations of the vehicle body, and take measures against noise without increasing the weight of the vehicle body and ensuring pedestrian protection performance.
Furthermore, since the first reinforcing portion 41 is coupled to the cowl upper member (the cowl panel 9) and the existing wiper bracket 42 is used as the second reinforcing portion, the first reinforcing portion 41 can be easily attached to the cowl portion structure.

9 to 11 show a third embodiment of the cowl structure of the vehicle, FIG. 9 is a perspective view showing the cowl structure, FIG. 10 is a side view of the main part of FIG. 9, and FIG. 11 is an enlarged perspective view of the reinforcing body. It is. 9 to 11, the same parts as those in the previous figures are denoted by the same reference numerals, and detailed description thereof is omitted.
As shown in FIG. 10, also in the third embodiment, a reinforcing body 50 (so-called I) having a forward inclined posture that connects a cowl panel 9 as a cowl upper member and a dash upper panel 7 as a cowl lower member in a substantially vertical direction. Character gusset).
The reinforcing body 50 includes a first reinforcing portion 51 which is coupled to the lower surface of the front end portion of the cowl panel 9 by spot welding means and extends in the direction of the dash upper panel 7, and the front end portion 7 a and the rear end portion 7 b of the dash upper panel 7. And a second reinforcing portion 52 that is coupled to the front surface of the slant portion between the two by a spot welding means or the like and extends in the front portion direction of the cowl panel 9. Here, although each of the first and second reinforcing portions 51 and 52 described above is formed of an iron plate having a plate thickness of 0.55 mm, the plate thickness and material are not limited thereto.

As shown in FIG. 9, the reinforcing body 50 described above divides the length of the front window glass 8 in the vehicle width direction into approximately two equal parts. It is provided corresponding to the center in the vehicle width direction.
As shown in an enlarged perspective view in FIG. 11, the reinforcing body 50 includes a first reinforcing portion 51 integrally formed with a bent piece 51a at the upper end portion and extending in the vertical direction, and a bent piece 52a formed integrally with the lower end portion. And a second reinforcing portion 52 extending in the vertical direction, and an overlapping portion 53 as an overlapping portion is formed by overlapping the lower portion of the first reinforcing portion 51 and the upper portion of the second reinforcing portion 52 in the front-rear direction of the vehicle. The first reinforcing portion 51 and the second reinforcing portion 52 are connected to each other via at least a part (substantially all in this embodiment) of the overlap portion 53 via the vibration damping member 54.

Here, the bent piece 51 a of the first reinforcing portion 51 is coupled to the lower surface of the front end portion of the cowl panel 9 in the vicinity of the front end of the cowl opening 10, and the coupling portion 55 between the cowl panel 9 and the first reinforcing portion 51. Is provided.
Further, the bent piece 52a of the second reinforcing portion 52 is coupled to the front surface of the slant portion of the dash upper panel 7 below and behind the above-described coupling portion 55, so that the dash upper panel 7 and the second reinforcing portion 52 The coupling portion 56 is provided.
Further, as the above-described vibration damping member 54, a viscoelastic member having a loss coefficient (20 ° C., 30H _Z ) of 1.0 is used, and the viscoelastic member is bonded and fixed to the overlap portion 53. In addition, the 1st, 2nd reinforcement parts 51 and 52 are formed with the iron plate, The plate | board thickness is set to 0.55 mm.

  FIG. 12 shows a product of this embodiment in which a vibration damping member 54 is interposed in an overlap portion 53 of a reinforcing member 50 having a two-part structure, and a comparative example having a non-split structure reinforcing body and using no vibration damping member. And the result of having performed the simulation analysis with respect to each cowl part structure with the conventional product which does not have a reinforcement body itself is shown with the characteristic view.

  As an analysis evaluation method, as in the first and second embodiments, the front suspension mounting portion as a vibration position is vibrated, and each point of a portion of the front window glass 8 that is in contact with the cavity in the passenger compartment 4 is analyzed. In FIG. 12, the acceleration of the nodes of the analysis model is shown as a sum of squares.

Figure 12 takes the frequency band of 47.5～82.5H _Z in the horizontal axis, which was taken panels acceleration on the vertical axis, characteristic in FIG indicated a is that of the Example product, with b and the characteristic shown those comparison example, there is the characteristic indicated by c is conventional, these characteristics a, b, in c, the maximum peak value among the 47.5~82.5H _Z P21, P22 , P23 is evaluated according to the size.
It is recognized that the peak value P22 is lower in the characteristic value b of the comparative example product having the reinforcing body than the peak value P23 in the characteristic value c of the conventional product having no reinforcing body itself. On the other hand, it is recognized that the peak value P21 is further lowered in the characteristic a of this example product, and it is clear that the panel acceleration level is sufficiently lowered and the vibration damping effect is the highest in this example product. became.

  As described above, the cowl structure of the vehicle of the third embodiment shown in FIGS. 9 to 11 extends in the vehicle width direction of the vehicle, and includes a cowl upper member (cowl panel 9) and a cowl lower member (dash upper panel 7). ) And a cowl structure of the vehicle in which an open cross section (cowl opening 10) that opens forward of the vehicle is formed, the cowl upper member (cowl panel 9) and the cowl lower member (dash upper panel 7), A first reinforcing portion 51 coupled to the cowl upper member (cowl panel 9) and extending in the direction of the cowl lower member (dash upper panel 7), and the cowl lower portion. A second reinforcing part 52 coupled to a member (dash upper panel 7) and extending in the direction of the cowl upper member (cowl panel 9), the first reinforcing part 51 and the second reinforcing part 5 Has an overlapping portion (overlap portion 53), and the first reinforcing portion 51 and the second reinforcing portion 52 have the vibration damping member 54 in at least a part of the overlapping portion (overlap portion 53). (See FIG. 10).

According to this configuration, the reinforcing member 50 that connects the cowl upper member (the cowl panel 9) and the cowl lower member (the dash upper panel 7) suppresses the rocking deformation caused by the collapse of the cross section of the open cross section (the cowl opening 10). can do.
Further, without increasing the plate thickness of the reinforcing body 50, the vibration damping member 54 interposed in at least a part of the overlapping portion (overlap portion 53) of the first reinforcing portion 51 and the second reinforcing portion 52, Vibration attenuation can be achieved effectively. Therefore, it is possible to improve riding comfort performance, take measures against vibrations of the vehicle body, and take measures against noise without increasing the weight of the vehicle body and ensuring pedestrian protection performance.
Further, the first reinforcing portion 51 is coupled to the cowl upper member (the cowl panel 9), and the second reinforcing portion 52 is coupled to the cowl lower member (the dash upper panel 7). The first and second reinforcing portions 51 and 52 can be easily attached.

In FIG. 10, the first reinforcing portion 51 is located on the front side in the vehicle front-rear direction, and the second reinforcing portion 52 is located on the rear side in the vehicle front-rear direction. Of course.
In addition, the overlapping portion (overlap portion 53) is configured to overlap in the vehicle front-rear direction (see FIGS. 10 and 11).

According to this configuration, vibration damping can be effectively achieved by the vibration damping member 54 interposed in at least a part of the overlapping portion (overlap portion 53) overlapped in the front-rear direction of the vehicle.
The overlapping portion (overlap portion 53) is configured to be overlapped in the vehicle front-rear direction, and the cowl upper member (the cowl panel 9) and the first member are disposed in the vicinity of the front end of the opening (the cowl opening 10). 1 A connecting portion 55 with the reinforcing portion 51 is provided (see FIG. 10).

  According to this configuration, in the opening (the cowl opening 10) of the cowl upper member (the cowl panel 9) and the cowl lower member (the dash upper panel 7), the vicinity of the front end of the opening is relatively displaced with respect to the rear part of the opening. The coupling portion 55 between the cowl upper member (the cowl panel 9) and the first reinforcing portion 51 is provided at a portion where the relative displacement is larger (near the front end of the opening), and the first reinforcing portion 51 and the first reinforcing portion 51 Since the vibration damping member 54 is interposed in at least a part of the overlapping portion (overlap portion 53) where the two reinforcing portions 52 are overlapped, the vibration damping effect can be further enhanced.

This point will be further described in detail with reference to FIGS.
In FIG. 13, the position of the reinforcing body 50 in the forward inclined posture is changed between the cowl panel 9 and the dash upper panel 7, and the position A is the open end position of the cowl opening 10 and the position B is the cowl. The opening side position of the opening 10, position C is a front position in the middle of the cowl opening 10 in the front-rear direction, position D is a rear position in the middle of the cowl opening 10 in the front-rear direction, and position E is the rearmost position of the cowl opening 10. FIG. 14 shows the result of simulation analysis with the reinforcing body 50 attached alternatively to each of these positions A to E.

FIG. 14 is a characteristic diagram in which frequency is plotted on the horizontal axis and point inertance is plotted on the vertical axis. The characteristic a at the position A, the characteristic b at the position B, the characteristic c at the position C, and the characteristic d at the position D , And a characteristic e of the position E.
As an analysis evaluation method, the central lower portion of the front window glass 8 is vibrated in the vertical direction, the acceleration of the same part is measured, and this measured value is shown as a point inertance in FIG.

As is clear from FIG. 14, the point inertance decreases in the order of the characteristics e, d, c, b, and a characteristic a at the position A corresponding to the open end of the cowl opening 10 has the highest vibration damping effect. It was found that the amount of vibration level reduction was the largest.
Therefore, it was proved that the vibration damping effect increases as the reinforcing body 50 is provided on the front end open side of the cowl opening 10.

In the embodiment shown in FIG. 9, the single reinforcing member 50 is placed at the center in the vehicle width direction in correspondence with the mode (primary mode) in which the lower center of the front window glass 8 vibrates most in the direction perpendicular to the plane. Although provided, a plurality of reinforcing bodies 50 may be provided corresponding to the vibration mode.
That is, corresponding to the mode (secondary mode) in which the lower left side and the lower right side of the front window glass 8 vibrate in opposite phases, as shown in FIG. Reinforcing bodies 50 may be provided respectively at locations (positions that divide the vehicle width direction into approximately three equal parts). As shown in FIG. 16, in order to correspond to the primary mode and the secondary mode of vibration, Reinforcing bodies 50 may be provided respectively at a total of three locations in the center and in the vehicle width direction.

FIG. 17 shows an embodiment for improving the assembly of the reinforcing body 50. FIG. 17A is a side view before the vibration damping member is interposed, and FIG. 17B is a side view after the vibration damping member is interposed. It is. In FIG. 17, the same parts as those of the third embodiment (particularly, FIG. 10) are denoted by the same reference numerals, and detailed description thereof is omitted.
As shown in FIG. 17, a clip unit 37 in which a vibration damping member 54 is sandwiched and integrated is provided between a U-shaped resin clip 35 in a side view and a reverse U-shaped resin clip 36 in a side view. The unit 37 is inserted into the first reinforcing portion 51 and the second reinforcing portion 52 shown in FIG. 17A from the lateral direction in the vehicle width direction, and as shown in FIG. Is attached to the lower part of the first reinforcing part 51, and at the same time, the resin clip 36 is attached to the upper part of the second reinforcing part 52.
With this configuration, when the clip unit 37 is inserted from the lateral direction with respect to the reinforcing portions 51 and 52, the vibration damping member 54 is interposed in the overlap portion 53. The assembling property of the member 54 can be improved, and the occurrence of rust at the site where the vibration damping member 54 is interposed can be prevented.

  18A and 18B show still another embodiment for improving the assembling property of the reinforcing body 50. FIG. 18A is a side view before the vibration damping member is interposed, and FIG. FIG. In FIG. 18, the same parts as those of the third embodiment (particularly, FIG. 10) are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIG. 18A, a resin-made or rubber-made front grommet 45 is attached to a portion corresponding to the overlap portion of the second reinforcing portion 52, and the grommet 45 is made of resin via a vibration damping member 54. Alternatively, a rubber rear grommet 46 is attached, and an assembly 47 in which these elements 52, 45, 46, 54 are integrated into an integrated unit is provided.
A resin clip 48 is attached to the bent piece 52a of the second reinforcing portion 52, and a resin clip is attached to a predetermined portion (slant portion) of the dash upper panel 7 to which the bent piece 52a of the second reinforcing portion 52 is coupled. A locking hole 7c for locking 48 is formed as an opening.
Further, a locking hole 51 b for locking the rear grommet 46 is formed in the lower portion of the first reinforcing portion 51.
Then, from the state shown in FIG. 18A, first, the rear grommet 46 of the assembly 47 is engaged with the locking hole 51b of the first reinforcing portion 51, and then the resin clip 48 of the assembly 47 is inserted into the dash upper panel 7. As shown in FIG. 18B, a reinforcing body 50 is provided between the cowl panel 9 and the dash upper panel 7, and the vibration damping member 54 is provided in the overlap portion 53. It becomes the structure where is interposed.
Even if comprised in this way, while being able to aim at the assembly | attachment improvement of the reinforcement body 50, generation | occurrence | production of the rust in the insertion site | part of the vibration damping member 54 can be prevented.

FIG. 19 shows still another embodiment of the cowl structure of the vehicle. In this embodiment 6, a cowl panel 9 as a cowl upper member and a dash upper panel 7 as a cowl lower member are connected in a substantially vertical direction. A reinforcing body 60 is provided. The reinforcing body 60 bends a part of the front end portion of the cowl panel 9 in the direction of the dash upper panel 7, and a first reinforcing portion 61 integrally formed with the cowl panel 9, and the dash upper panel 7. And a second reinforcing portion 62 that extends in the direction of the front end portion of the cowl panel 9. In addition, the reinforcing body 60 is slanted in a front and rear and low state. The length of the reinforcing body 60 in the vehicle width direction is the same as that in FIG.
Moreover, also in the sixth embodiment, the first reinforcing portion 61 and the second reinforcing portion 62 have an overlap portion 63 as an overlapping portion, and each element 61, 62 is at least a part of the overlap portion 63 ( In this embodiment, substantially all) are coupled via the vibration damping member 64.
Here, as the above-described vibration damping member 64, a viscoelastic member having a loss coefficient (20 ° C., 30H _Z ) of 1.0 or more is used, and the viscoelastic member is bonded and fixed to the overlap portion 63.

  Thus, the cowl structure of the vehicle of the sixth embodiment shown in FIG. 19 extends in the vehicle width direction of the vehicle, and includes a cowl upper member (cowl panel 9) and a cowl lower member (dash upper panel 7). Reinforcement for connecting a cowl upper member (cowl panel 9) and a cowl lower member (dash upper panel 7) to a vehicle cowl structure in which an open section (cowl opening 10) that opens to the front of the vehicle is formed. A first reinforcing portion formed by bending at least a part of a front end portion of the cowl upper member (cowl panel 9) toward the cowl lower member (dash upper panel 7). 61 and a second reinforcing portion 62 coupled to the cowl lower member (dash upper panel 7) and extending in the direction of the cowl upper member (cowl panel 9), and the first reinforcing portion 6 And the second reinforcing portion 62 has an overlapping portion (overlap portion 63), and the first reinforcing portion 61 and the second reinforcing portion 62 are at least one of the overlapping portions (overlap portion 63). Are coupled via a vibration damping member 64 (see FIG. 19).

According to this structure, the rocking | fluctuation deformation | transformation by the cross-sectional collapse of an open cross-section part can be suppressed by the reinforcement body 60 which connects a cowl upper member (cowl panel 9) and a cowl lower member (dash upper panel 7).
Further, without increasing the plate thickness of the reinforcing body 60, the vibration damping member 64 interposed in at least a part of the overlapping portion (overlap portion 63) of the first reinforcing portion 61 and the second reinforcing portion 62, Vibration attenuation can be achieved effectively. Therefore, it is possible to improve riding comfort performance, take measures against vibrations of the vehicle body, and take measures against noise without increasing the weight of the vehicle body and ensuring pedestrian protection performance.
Further, since the first reinforcing portion 61 is integrally bent with the cowl upper member (the cowl panel 9), the number of parts can be reduced.
In the sixth embodiment shown in FIG. 19 as well, the other configurations, operations, and effects are almost the same as those of the previous embodiment. Therefore, in FIG. Detailed description thereof will be omitted.

FIG. 20 shows still another embodiment of the cowl structure of the vehicle. In this embodiment 7, a cowl panel 9 as a cowl upper member and a dash upper panel 7 as a cowl lower member are connected in a substantially vertical direction. A reinforcing body 70 is provided, and the reinforcing body 70
The first reinforcing portion 71 coupled to the lower surface of the front end portion of the cowl panel 9 and extending in the direction of the dash upper panel 7 and a portion of the dash upper panel 7 bent toward the front end portion of the cowl panel 9 7 and a second reinforcing portion 72 that is formed integrally with 7. Further, the reinforcing body 70 is slanted in a front and rear and low state. The length of the reinforcing body 70 in the vehicle width direction is the same as that in FIG.
Moreover, also in the seventh embodiment, the first reinforcing portion 71 and the second reinforcing portion 72 have an overlap portion 73 as an overlapping portion, and each element 71, 72 is at least a part of the overlap portion 73 ( In this embodiment, substantially all) are coupled via a vibration damping member 74.
Here, as the above-described vibration damping member 74, a viscoelastic member having a loss coefficient (20 ° C., 30H _Z ) of 1.0 or more is used, and the viscoelastic member is bonded and fixed to the overlap portion 73.

  In this manner, the cowl structure of the vehicle of the seventh embodiment shown in FIG. 20 extends in the vehicle width direction of the vehicle, and includes a cowl upper member (cowl panel 9) and a cowl lower member (dash upper panel 7). Reinforcement for connecting a cowl upper member (cowl panel 9) and a cowl lower member (dash upper panel 7) to a vehicle cowl structure in which an open section (cowl opening 10) that opens to the front of the vehicle is formed. A first reinforcing portion 71 coupled to the cowl upper member (cowl panel 9) and extending toward the cowl lower member (dash upper panel 7); and the cowl lower member (dash). A second reinforcing portion 72 formed by bending at least a part of the upper panel 7) toward the cowl upper member (the cowl panel 9), and the first reinforcing portion 71 and the second reinforcing portion 72 2 The reinforcing part 72 has an overlapping part (overlapping part 73), and the first reinforcing part 71 and the second reinforcing part 72 vibrate in at least a part of the overlapping part (overlapping part 73). It is connected via a damping member 74 (see FIG. 20).

According to this structure, the rocking | fluctuation deformation | transformation by the cross-sectional collapse of an open cross-section part can be suppressed by the reinforcement body 70 which connects the cowl upper member (cowl panel 9) and the cowl lower member (dash upper panel 7).
Further, without increasing the plate thickness of the reinforcing body 70, the vibration damping member 74 interposed in at least a part of the overlapping portion (overlap portion 73) of the first reinforcing portion 71 and the second reinforcing portion 72, Vibration attenuation can be achieved effectively. Therefore, it is possible to improve riding comfort performance, take measures against vibrations of the vehicle body, and take measures against noise without increasing the weight of the vehicle body and ensuring pedestrian protection performance.
Further, since the second reinforcing portion 72 is integrally formed with the cowl lower member (dash upper panel 7), the number of parts can be reduced.
In the seventh embodiment shown in FIG. 20 as well, the other configurations, operations, and effects are almost the same as those of the previous embodiment. Therefore, in FIG. Detailed description thereof will be omitted.

FIG. 21 shows still another embodiment of the structure of the cowl portion of the vehicle. In Embodiment 8, a cowl panel 9 as a cowl upper member and a dash upper panel 7 as a cowl lower member are connected in a substantially vertical direction. A reinforcing body 80 is provided, and the reinforcing body 80
The first reinforcing portion 81 coupled to the lower surface of the front end portion of the cowl panel 9 and extending toward the dash upper panel 7, and the second reinforcing portion 82 coupled to the dash upper panel 7 and extending toward the front end portion of the cowl panel 9; It has. Further, the reinforcing body 80 is formed by slanting the main parts other than the overlap part 83 described below in a front and rear and low state. The length of the reinforcing body 80 in the vehicle width direction is the same as that in FIG.
The lower part of the first reinforcing part 81 is bent substantially horizontally with the rear side facing backward, and the bent piece 81a is integrally formed, and the upper part of the second reinforcing part 82 is also bent with the upper part bent substantially horizontally with the rear side being bent. The piece 82 a is integrally formed, and an overlap portion 83 is formed in which the first reinforcement portion 81 and the second reinforcement portion 82 are vertically overlapped, and each of the bent pieces 81 a and 82 a is at least a part of the overlap portion 83. (In this embodiment, substantially all of them) are coupled via a vibration damping member 84.
As the vibration damping member 84, a viscoelastic member having a loss coefficient (20 ° C., 30 H _Z ) of 1.0 or more is used, and the viscoelastic member is bonded and fixed to the overlap portion 83.

As described above, the cowl structure of the vehicle of the eighth embodiment shown in FIG. 21 is configured such that the overlapping portion (overlap portion 83) is overlapped in the vertical direction of the vehicle (FIG. 21). reference).
According to this configuration, vibration attenuation can be effectively achieved by the vibration damping member 84 interposed in at least a part of the overlapping portion (overlap portion 83) that is overlapped in the vertical direction of the vehicle.
In the eighth embodiment shown in FIG. 21 as well, the other configurations, functions, and effects are almost the same as those of the previous embodiment. Therefore, in FIG. Detailed description thereof will be omitted.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The cowl upper member of the present invention corresponds to the cowl panel 9 of the embodiment,
Similarly,
The cowl lower member corresponds to the dash upper panel 7 or the cowl front panel 11,
The open section that opens to the front of the vehicle corresponds to the cowl opening 10,
The overlapping part corresponds to the overlapping parts 33, 43, 53, 63, 73, 83,
Front window member corresponds to the front window glass 8,
In the second embodiment, the second reinforcing portion corresponds to the wiper bracket 42.
The present invention is not limited to the configuration of the above-described embodiment.
For example, in the overlap portions 33, 43, 53, 63, 73, 83 as overlapping portions, the first reinforcing portion and the second reinforcing portion are partially rigidly connected by spot welding bonding, adhesive bonding or fastening bonding. May be.
Moreover, you may cover the circumference | surroundings of the above-mentioned overlapping part with a rubber member etc. in order to aim at the position shift prevention at the time of an assembly | attachment.
Further, the material of the first reinforcing portion and the second reinforcing portion constituting the reinforcing body may be made of stainless steel or a hard resin having high rigidity in place of the iron plate so as to prevent rust and prevent electric corrosion. .

  As described above, the present invention is useful for a vehicular cowl structure that extends in the vehicle width direction of the vehicle and has an open cross section that is open to the front of the vehicle by a cowl upper member and a cowl lower member.

7. Dash upper panel (Cowl lower part)
8 ... Front window glass (front window member)
9 ... Cowl panel (Cowl upper member)
10 ... Cowl opening (open section)
11 ... Cowl front panel (Cowl lower part)
30, 40, 50, 60, 70, 80 ... reinforcement bodies 31, 41, 51, 61, 71, 81 ... first reinforcement portions 32, 52, 62, 72, 82 ... second reinforcement portions 33, 43, 53, 63, 73, 83 ... overlap portions 34, 44, 54, 64, 74, 84 ... vibration damping member 42 ... wiper bracket (second reinforcing portion)
55. Joint part

Claims (9)

A cowl structure of a vehicle that extends in the vehicle width direction of the vehicle and has an open cross section that is opened forward of the vehicle by a cowl upper member and a cowl lower member,
A reinforcing body that connects the cowl upper member and the cowl lower member;
A first reinforcing portion coupled to the cowl upper member and extending toward the cowl lower member;
A second reinforcing portion coupled to the cowl lower member and extending in the direction of the cowl upper member,
The first reinforcing part and the second reinforcing part have an overlapping part,
A vehicle cowl structure in which the first reinforcing portion and the second reinforcing portion are coupled to each other in at least a part of the overlapping portion via a vibration damping member. A cowl structure of a vehicle that extends in the vehicle width direction of the vehicle and has an open cross section that is opened forward of the vehicle by a cowl upper member and a cowl lower member,
A reinforcing body that connects the cowl upper member and the cowl lower member;
A first reinforcing portion formed by bending at least a part of a front end portion of the cowl upper member toward the cowl lower member;
A second reinforcing portion coupled to the cowl lower member and extending in the direction of the cowl upper member,
The first reinforcing part and the second reinforcing part have an overlapping part,
A vehicle cowl structure in which the first reinforcing portion and the second reinforcing portion are coupled to each other in at least a part of the overlapping portion via a vibration damping member. A cowl structure of a vehicle that extends in the vehicle width direction of the vehicle and has an open cross section that is opened forward of the vehicle by a cowl upper member and a cowl lower member,
A reinforcing body that connects the cowl upper member and the cowl lower member;
A first reinforcing portion coupled to the cowl upper member and extending toward the cowl lower member;
A second reinforcing portion formed by bending at least a part of the cowl lower member toward the cowl upper member,
The first reinforcing part and the second reinforcing part have an overlapping part,
A vehicle cowl structure in which the first reinforcing portion and the second reinforcing portion are coupled to each other in at least a part of the overlapping portion via a vibration damping member. The vehicle cowl structure according to claim 1 or 3, wherein the overlapping portion is configured to be overlapped in a longitudinal direction of the vehicle. The overlapping part is configured to be overlapped in the longitudinal direction of the vehicle,
The vehicle cowl structure according to claim 1 or 2, wherein a coupling portion between the cowl upper member and the first reinforcing portion is provided in the vicinity of a front end of the opening. The vehicle cowl structure according to claim 1, wherein the overlapping portion is configured to be overlapped in the vehicle width direction. The vehicle cowl part structure according to any one of claims 1 to 6, wherein the cowl upper member is a cowl panel that extends forward from the upper part of the dash upper panel and supports the lower end of the front window member. The vehicle cowl part structure according to any one of claims 1 to 3, wherein the overlapping part is configured to be overlapped in a vertical direction of the vehicle. The cowl lower member forms a closed cross section extending in the vehicle width direction between the dash upper panel, a cowl front panel extending forward from the lower portion of the dash upper panel, or the cowl front panel. The cowl structure of a vehicle according to any one of claims 1 to 8.

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