JP2010228717A - Vehicle body front structure in vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the generation of road noise in a cabin by preventing vibration from being easily transmitted to a cabin forming part of a vehicle body front part such as front window glass successively via right-left side members of a vehicle body and a front cowl installed at both these side members when a vehicle travels. <P>SOLUTION: The front cowl 10 has an inner cowl 26 for constituting its lower part, and a plate-like outer cowl 27 projecting forward from a rear upper part of the inner cowl 26 and supported as a cantilever by the rear upper part of the inner cowl 26. A plurality of convex seat surfaces 46-50 are formed in the width direction of the vehicle body 2 in a projecting part 42 of the outer cowl 27, and a rear edge of a cowl louver 20 is fixed to each convex seat surface 46-50 by a fixture 22. Among the respective convex seat surfaces 46-50, a bead 51 is formed in the outer cowl 27 for connecting both the mutually adjacent convex seat surfaces 46 and 47 to each other by being positioned at an end in the longitudinal direction of the outer cowl 27. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  In the present invention, when the vehicle is running, vibrations are generated in the vehicle compartment forming part such as the front windshield from the front wheel side through the left and right side members of the vehicle body and the front cowls installed on the both side members. The present invention relates to a vehicle body front structure in a vehicle for preventing transmission easily.

  The vehicle body front structure in the vehicle usually includes left and right side members of the vehicle body having a suspension tower that supports left and right front wheels by a suspension device, and a front that extends in the width direction of the vehicle body and is laid on the left and right side members. A cowl, a front windshield extending from the front cowl side toward the rear upper side and having a front lower edge portion supported by the front cowl, and a front window glass, and the front cowl are provided to cover the front cowl from above. It has a cowl louver.

  More specifically, there is a conventional one disclosed in Patent Document 1 below. According to this publication, the front cowl in the front structure of the vehicle body constitutes the lower part thereof, and the inner cowl that is U-shaped in a cross-sectional side view of the vehicle body, and projects from the rear upper part of the inner cowl toward the front, A plate-shaped outer cowl that is cantilevered at the rear upper part of the inner cowl. A convex seat surface is formed on the upper surface of the forward projecting portion of the outer cowl, and the rear edge portion of the cowl louver is fixed to the convex seat surface. A front lower edge portion of the windshield is fixed to the upper surface of the outer cowl behind the convex seat surface. Conventionally, a plurality of convex seat surfaces are formed in the width direction of the vehicle body, and a rear edge portion of the cowl louver is fixed to each of the convex seat surfaces.

  Here, when the vehicle collides with a certain object ahead (front collision) while the vehicle is traveling forward, the object may be flipped up by the front collision and collide with the front cowl from above. is there. In this case, if the strength or rigidity of the front cowl is too large, the impact force when an object collides with the front cowl tends to be excessive, which is not preferable.

  Therefore, the outer cowl of the front cowl is cantilevered at the front upper part of the inner cowl, as described above, and the outer cowl is cantilevered at the rear upper part of the inner cowl as described above. An increase in the strength of the cowl and the like is suppressed. For this reason, when an object collides with the front cowl from above during a frontal collision, the front cowl is more greatly plastically deformed, thereby sufficiently reducing the impact force.

JP 2007-131149 A

  By the way, when the vehicle travels, vibrations are normally transmitted from the front wheel side to the front windshield through the left and right side members of the vehicle body and the front cowls installed on both side members. In this case, as described above, since the strength of the front cowl is suppressed, the protrusion of the outer panel that is particularly cantilevered tends to vibrate more greatly. Then, the front window glass fixed to the outer panel and having a flat overall shape and a large area tends to vibrate in conjunction with the outer cowl. As a result, the vibration of the windshield may cause a booming noise called road noise in the passenger compartment.

  Therefore, it is conceivable to improve the strength and the like of this end by reinforcing only the longitudinal end of the front cowl while suppressing the improvement of the strength and the like of the front cowl as a whole. In this way, when the vehicle is running, the transmission of vibration from each side member of the vehicle body to the midway side in the longitudinal direction of the front cowl is restricted at each end of the front cowl. The generation of road noise is considered to be prevented.

  However, if an additional reinforcing member is provided to increase the strength of the end portion of the front cowl or the thickness of the end portion of the front cowl is increased, the structure of the front structure of the vehicle body becomes complicated. This is not preferable because of the inconvenience that the mass increases.

  The present invention has been made paying attention to the above-described circumstances, and an object of the present invention is to sequentially arrange left and right side members of a vehicle body and front cowls installed on both side members when the vehicle is running. This prevents vibration from being easily transmitted to the vehicle compartment forming parts such as the windshield through the front windshield so that road noise does not occur in the vehicle compartment. It can be achieved by avoiding it.

The invention of claim 1 includes a front cowl 10 that extends in the width direction of the vehicle body 2 and is installed on the left and right side members 4 of the vehicle body 2, and a cowl louver 20 that is provided so as to cover the front cowl 10 from above. The front cowl 10 includes an inner cowl 26 that constitutes a lower portion thereof, and a plate-shaped outer cowl 27 that protrudes forward from the rear upper part of the inner cowl 26 and is cantilevered on the rear upper part of the inner cowl 26. A plurality of convex seat surfaces 46 to 50 are formed in the width direction of the vehicle body 2 on the upper surface of the projecting portion 42 of the outer cowl 27, and the rear edge portion of the cowl louver 20 is fixed to each of the convex seat surfaces 46 to 50, respectively. In the vehicle body front structure in the vehicle fixed by 22,
A bead 51 is formed on the outer cowl 27 to connect the convex surfaces 46 and 47 adjacent to each other at the end portion of the outer cowl 27 in the longitudinal direction of the convex seat surfaces 46 to 50. The vehicle body front structure in the vehicle.

  According to the second aspect of the present invention, the front windshield 14 extending from the front cowl 10 side toward the rear upper side is provided, and the front windshield 14 is placed on the upper surface of the outer cowl 27 behind the convex seat surfaces 46 to 50. The lower edge 15 is bonded by the adhesive 16, extends along the front edge of the adhesive 16, and a ridge line 44 is formed on the upper surface of the protrusion 42 of the outer cowl 27 in the vicinity of the front edge of the adhesive 16. 2. The vehicle body front structure according to claim 1, wherein the outer cowl 27 is bent.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

The invention of claim 1 includes a front cowl that extends in the width direction of the vehicle body and is installed on left and right side members of the vehicle body, and a cowl louver that is provided so as to cover the front cowl from above. An inner cowl that forms the lower part of the inner cowl, and a plate-shaped outer cowl that projects forward from the rear upper part of the inner cowl and is cantilevered on the rear upper part of the inner cowl. In the vehicle body front structure in a vehicle in which a plurality of convex seat surfaces are formed in the width direction of the vehicle, and the rear edge portion of the cowl louver is fixed to each convex seat surface by a fixing tool.
Of the convex seat surfaces, a bead is formed on the outer cowl to connect the two convex seat surfaces adjacent to each other at the end in the longitudinal direction of the outer cowl.

  Here, out of the front cowls, the outer cowl is cantilevered by the inner cowl to prevent the strength and the like from increasing in order to reduce the impact force at the time of collision with the front cowl. However, according to the above invention, the bead for connecting the two convex seat surfaces at the end portion of the outer cowl is formed, and the two convex seat surfaces and the bead cooperate to effectively improve the strength of the end portion of the outer cowl. Will be improved.

  Therefore, during the traveling of the vehicle, the transmission of vibration from each side member of the vehicle body to the middle part in the longitudinal direction of the outer cowl is restricted at each end of the outer cowl with improved strength and the like. For this reason, the casing forming component fixed to the front cowl is prevented from vibrating in conjunction with the vibration transmitted to the middle part of the outer cowl. As a result, generation of road noise in the passenger compartment is prevented. The

  Further, the above-described effective improvement in the strength and the like at the end portion of the outer cowl has been achieved by connecting the two convex seating surfaces for fixing the rear edge portion of the cowl louver to the projecting portion of the outer cowl by a bead. Thus, the occurrence of road noise described above can be achieved with a simple configuration and avoiding an increase in mass by using both convex seat surfaces.

  According to a second aspect of the present invention, a front window glass extending from the front cowl side toward the rear upper side is provided, and the front lower edge portion of the front window glass is attached to the upper surface of the outer cowl behind each convex seat surface with an adhesive. The outer cowl is bent so that a ridge line is formed on the upper surface of the protruding portion of the outer cowl in the vicinity of the front edge of the adhesive material.

  Here, when the vehicle travels, transmission of vibration from each side member of the vehicle body to the midway side in the longitudinal direction of the front cowl is restricted by the formation of the beads as described above. However, when the vibration is transmitted from the side members of the vehicle body to the midway portion of the outer cowl in the longitudinal direction when the vehicle is traveling, the outer end of the protruding portion of the outer cowl is as described above. It vibrates relatively easily around the formed ridgeline, and the energy of this vibration is absorbed.

  Accordingly, since the entire outer cowl is prevented from vibrating, the windshield glass fixed to the outer cowl is prevented from vibrating in conjunction with the vibration of the outer cowl. Generation of noise is more reliably prevented.

It is a fragmentary top view of a vehicle body front part. It is a fragmentary perspective view of a vehicle body front part. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1.

  The vehicle body front part structure in a vehicle according to the present invention relates to a vehicle compartment forming component such as a windshield, which is sequentially passed through left and right side members of the vehicle body and front cowls installed on both side members when the vehicle is running. The purpose is to prevent vibrations from being easily transmitted to the vehicle interior so that road noise does not occur in the passenger compartment, and to achieve this with a simple configuration and avoiding an increase in mass. Therefore, the form for carrying out the present invention is as follows.

  That is, the vehicle body front structure in the vehicle includes a front cowl that extends in the width direction of the vehicle body and is installed on left and right side members of the vehicle body, and a cowl louver that is provided so as to cover the front cowl from above. The front cowl includes an inner cowl that constitutes a lower part thereof, and a plate-shaped outer cowl that projects forward from the rear upper part of the inner cowl and is cantilevered on the rear upper part of the inner cowl. A plurality of convex seat surfaces are formed on the upper surface of the projecting portion of the outer cowl in the width direction of the vehicle body, and the rear edge portion of the cowl louver is fixed to each of the convex seat surfaces by a fixing tool. A bead is formed in the outer cowl, which is located at an end portion of the outer cowl in the longitudinal direction and connects the adjacent convex seating surfaces to each other.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  In the figure, reference numeral 1 denotes a vehicle exemplified by an automobile, and an arrow Fr indicates the front in the traveling direction of the vehicle 1. The left and right described below refer to the width direction of the vehicle body 2 of the vehicle 1 toward the front.

  The vehicle body 2 is made of sheet metal, and a front portion of the vehicle body 2 includes left and right side members 3 extending in the front-rear direction of the vehicle body 2 and side members 4 extending upward from the side members 3. ing. The side member 4 extends upward from a midway portion in the longitudinal direction of the side member 3, and a center pillar 7 that supports the roof at the extended end, and a midway portion in the longitudinal direction of the center pillar 7. An apron member 8 that protrudes forward from the side member 3 and a suspension tower 9 that is mounted on the side member 3 and the apron member 8 and that suspends a front wheel (not shown) via a suspension device.

  The vehicle body 2 includes a front cowl 10 that extends in the width direction and is provided on the left and right side members 4, and a dash panel 11 that extends downward from a lower portion of the front cowl 10. . In this case, each end portion of the front cowl 10 in the longitudinal direction is coupled across the center pillar 7, apron member 8, and suspension tower 9 of the side member 4. The upper edge of the dash panel 11 is coupled to the front cowl 10, and each side edge of the dash panel 11 is a midway in the longitudinal direction of the side member 3 and the rear edge of the suspension tower 9. And is bound to. The front cowl 10 and the dash panel 11 form a lower front surface of the vehicle compartment 12 in the vehicle body 2 and are vehicle compartment forming components.

  A front windshield 14 extending from the front cowl 10 side toward the rear upper side and forming the upper front surface of the passenger compartment 12 is provided. The front windshield 14 is also a compartment forming part. The front lower edge 15 of the windshield 14 is supported by being bonded to the front cowl 10 with an adhesive 16, and the side edge of the windshield 14 is bonded to and supported by the upper portion of the center pillar 7. Yes.

  A front space between the front cowl 10 and the dash panel 11 is an engine room 18. A hood 19 is provided for closing the upper end opening of the engine room 18 from above. Further, a resin cowl louver 20 is provided so as to cover the front cowl 10 from above, and the cowl louver 20 is fixed to the front cowl 10 by front and rear fixing tools 21 and 22. A seal body 23 is provided that is attached to the front edge of the cowl louver 20 and seals between the front edge and the rear edge of the hood 19. In FIG. 1, reference numeral 24 denotes a vehicle body center in the width direction of the vehicle body 2, and the vehicle body 2 is substantially symmetrical with respect to the vehicle body center 24.

  The front cowl 10 includes an inner cowl 26 that forms the lower part thereof, and a plate-shaped outer cowl 27 that protrudes forward from the rear upper part of the inner cowl 26 and is cantilevered on the rear upper part of the inner cowl 26.

  More specifically, the inner cowl 26 has a U-shaped cross section in a side view of the vehicle body 2 (FIGS. 3 and 4), and front and rear plates 29 and 30 facing each other in the front-rear direction. A bottom plate 31 that integrally couples the lower edges of the front and rear plates 29 and 30, and a front and rear outward flange that are integrally formed with the upper edges of the front and rear plates 29 and 30, respectively. 32, 33. The bottom plate 31 of the inner cowl 26 at the longitudinal end portion of the front cowl 10, the upper surface plate of the suspension tower 9, and the upper edge portion of the dash panel 11 are coupled to each other by spot welding S1.

  The outer cowl 27 has an inverted U-shaped cross section as viewed from the side of the vehicle body 2 (FIGS. 3 and 4), front and rear plates 36 and 37 facing each other in the front-rear direction, and front and rear plates 36. , 37 integrally connecting the upper edge portions of the front and rear plates 36, 37, and the front and rear flanges 39, 40 formed integrally with the lower edge portions of the front and rear plates 36, 37, respectively. It has. In this case, the front plate 36 is inclined so as to be directed forward and downward.

  The rear upper portion of the inner cowl 26 is constituted by the rearward outward flange 33 of the inner cowl 26, and the rearward outward flange 40 of the outer cowl 27 is coupled to the rearward outward flange 33 by spot welding S2. The front plate 36, the rear plate 37, the ceiling plate 38, and the front outward flange 39 of the outer cowl 27 are formed as protrusions 42 protruding forward from the rear outward flange 33 of the inner cowl 26. Is cantilevered on the rear outward flange 33 of the inner cowl 26. Further, the front outward flange 39 of the outer cowl 27 is located farther rearward than the front outward flange 32 of the inner cowl 26 and has a rain gutter structure.

  Of the projecting portion 42 of the outer cowl 27, the upper portion of the front plate 36 extends forward and downward, and the front lower edge portion 15 of the front window glass 14 is bonded to the upper surface of the front plate 36 by an adhesive 16. . The front edge of the adhesive 16 corresponds to the front edge of the adhesive portion between the front lower edge 15 of the front window glass 14 and the front plate 36 of the outer cowl 27. A ridgeline (mountain fold line) 44 is formed along the front edge of the adhesive 16 in the width direction of the vehicle body 2 and on the upper surface of the protruding portion 42 of the outer cowl 27 in the vicinity of the front edge of the adhesive 16. The outer cowl 27 is bent. More specifically, the front portion of the outer cowl 27 is bent downward with respect to the rear portion of the front plate 36. The ridge line 44 is formed over substantially the entire length of the outer cowl 27.

  On the front upper surface of the front plate 36 in the projecting portion 42 of the outer cowl 27, a plurality (seven) of convex seat surfaces 46 to 50 projecting upward are formed in the width direction of the vehicle body 2. The front lower edge portion 15 of the windshield 14 is bonded to the upper surface of the front plate 36 of the outer cowl 27 as described above behind the convex seat surfaces 46 to 50. A front edge portion of the cowl louver 20 is fixed to the front outward flange 32 of the inner cowl 26 by the front fixing tool 21, and a rear edge portion of the cowl louver 20 is fixed to the convex seat surfaces 46 to 46 by the rear fixing tool 22. 50, respectively.

  Of the convex seat surfaces 46 to 50, a bead 51 that is located at an end portion in the longitudinal direction of the outer cowl 27 and connects the convex seat surfaces 46 and 47 that are adjacent in the longitudinal direction to each other is provided on the outer cowl 27. The protrusion 42 is formed. The beads 51 are formed so as to bulge upward, and extend linearly in the longitudinal direction of the outer cowl 27.

  A wiper device 53 that can wipe off water droplets adhering to the outer surface of the windshield 14 is provided. The wiper device 53 is housed in the inner cowl 26, a pair of left and right pivot shafts 54, 54 supported by the inner cowl 26, a wiper arm 55 fixed to each pivot shaft 54 and supporting a blade. A wiper motor 57 that is supported by the inner cowl 26 and reciprocally rotates the wiper arm 55 via the wiper link 56 and the rotation shaft 54 is provided.

  According to the said structure, the bead 51 which connects the both convex seat surfaces 46 and 47 which are located in the edge part of the longitudinal direction of the said outer cowl 27 among the convex seat surfaces 46-50 and adjoin each other in the said longitudinal direction mutually. The outer cowl 27 is formed.

  Here, as described in the prior art, out of the front cowl 10, the outer cowl 27 is cantilevered and supported by the inner cowl 26 in order to reduce the impact force at the time of collision with the front cowl 10. Etc. are suppressed from becoming large. However, according to the above configuration, since the bead 51 that connects the both convex seat surfaces 46 and 47 at the end of the outer cowl 27 is formed, the both convex seat surfaces 46 and 47 and the bead 51 cooperate to form the outer cowl. Thus, the strength of the end portion 27 is effectively improved.

  Therefore, when the vehicle 1 is traveling, the transmission of vibration from each side member 4 of the vehicle body 2 to the middle part in the longitudinal direction of the outer cowl 27 is restricted at each end of the outer cowl 27 with improved strength and the like. Is done. For this reason, the casing forming parts such as the dash panel 11 and the front windshield 14 which are fixed to the outer cowl 27 and have a flat overall shape and a large area are subjected to vibration transmitted to the middle part of the outer cowl 27. Interlocking vibration is prevented, and as a result, generation of road noise in the passenger compartment 12 is prevented.

  Further, the above-described effective improvement in strength and the like at the end portion of the outer cowl 27 is achieved by using the bead 51 to connect the two convex seat surfaces 46 and 47 for fixing the rear edge portion of the cowl louver 20 to the protruding portion 42 of the outer cowl 27. Since the two convex seat surfaces 46 and 47 are used in this way, the above-described road noise generation prevention can be achieved with a simple configuration and avoiding an increase in mass. .

  Further, the strength and the like of the end portion of the outer cowl 27 are improved, so that the strength and the like of the end portion of the front cowl 10 are improved, and the end portion of the front cowl 10 itself is more reliably maintained in a predetermined shape. Therefore, when the end portion of the front cowl 10 is assembled to the side member 4 of the vehicle body 2, the end portion of the front cowl 10 is prevented from being unnecessarily deformed, and this assembly operation can be facilitated.

  Further, as described above, the front window glass 14 extending from the front cowl 10 side toward the rear upper side is provided, and the front lower side of the front window glass 14 is provided on the upper surface of the outer cowl 27 behind the convex seat surfaces 46 to 50. The edge 15 is bonded by the adhesive 16, extends along the front edge of the adhesive 16, and a ridge line 44 is formed on the upper surface of the protrusion 42 of the outer cowl 27 in the vicinity of the front edge of the adhesive 16. The outer cowl 27 is bent.

  Here, when the vehicle 1 is traveling, the transmission of vibration from the side members 4 of the vehicle body 2 to the midway side in the longitudinal direction of the front cowl 10 is restricted by the formation of the beads 51 as described above. However, if the vibration is transmitted from the side members 4 of the vehicle body 2 to the midway in the longitudinal direction of the outer cowl 27 while the vehicle 1 is traveling, the outer cowl 27 protrudes at the protruding portion 42. The end side vibrates relatively easily around the ridge line 44 formed as described above, and the energy of this vibration is absorbed.

  Therefore, since the entire outer cowl 27 is prevented from vibrating, the front windshield 14 fixed to the outer cowl 27 is prevented from vibrating in conjunction with the vibration of the outer cowl 27. As a result, the vehicle Generation of road noise in the chamber 12 is more reliably prevented.

  In addition, although the above is based on the example of illustration, you may provide the bead which connects the convex seat surfaces 47-50 other than the both convex seat surfaces 46 and 47 in the edge part of the said outer cowl 27 mutually. Further, a notch may be formed in the upper edge portion of the front plate 29 of the inner cowl 26, and a wiper motor 57 that is a part of the wiper device 53 may be disposed in the notch. Further, a hinge for the hood 19 may be disposed in the notch.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 4 Side part 10 Front cowl 11 Dash panel 12 Car compartment 14 Front window glass 15 Front lower edge part 16 Adhesive material 20 Cowl louver 22 Fixing tool 24 Car body center 26 Inner cowl 27 Outer cowl 42 Protrusion part 44 Ridge line 46 Convex seat surface 47 Convex seat surface 48 Convex seat surface 49 Convex seat surface 50 Convex seat surface 51 Bead A Vibration

Claims (2)

A front cowl that extends in the width direction of the vehicle body and is installed on left and right side members of the vehicle body, and a cowl louver that is provided so as to cover the front cowl from above, and the front cowl is an inner cowl that forms the lower part thereof And a plate-shaped outer cowl projecting forward from the rear upper part of the inner cowl and cantilevered at the rear upper part of the inner cowl. A plurality of protrusions in the width direction of the vehicle body are formed on the upper surface of the projecting part of the outer cowl. In the vehicle body front structure in a vehicle in which a seat surface is formed and the rear edge portion of the cowl louver is fixed to each convex seat surface by a fixing tool.
A vehicle body front structure in a vehicle, wherein a bead is formed on the outer cowl to connect the two convex seating surfaces adjacent to each other at the end in the longitudinal direction of the outer cowl among the convex seating surfaces.   A front window glass extending rearward and upward from the front cowl side is provided, and a front lower edge portion of the front window glass is adhered to an upper surface of the outer cowl behind each convex seat surface with an adhesive. 2. The vehicle body in a vehicle according to claim 1, wherein the outer cowl is bent so that a ridge line is formed on an upper surface of the protruding portion of the outer cowl in the vicinity of the front edge of the adhesive material. Front structure.

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