JP2014156243A - Vehicular cowl structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular cowl structure which absorbs an impact load efficiently, without bridging of a cowl panel in proximity of a bonnet, when the rear part of the bonnet deforms and moves to the lower side under an impact load applied to the bonnet from above.SOLUTION: A vehicular cowl structure comprises: lower end part 2a of a front window panel 2 of a vehicle; a seal mounting part 8 which is a cowl top cover 6 arranged between an upper end part 4a of a dash panel 4 and a rear end part 3a of a bonnet 3 and supports the rear end part 3a of the bonnet 3 through a sealing material 7; a vertical wall part 9 which is formed in the lower-side LWR, with the rear end part 8a of the seal mounting part 8 as the starting point 5; and a panel mounting part 10a which is supported in the upper end part 4a of the dash panel 4. The vertical wall part 9 consists of a first slope part 12 which is formed in the rear-side RR at a specified angle θ1 relative to a reference perpendicular line 11, with the rear end part 8a of the seal mounting part 8 as the starting point 5, and a second slope part 13 which is formed in the front-side FR of the first slope part 12 in a bent form.

Description

  The present invention relates to an automobile cowl structure, and more particularly to an automobile cowl structure that is disposed between a lower end portion of a front wind panel of an automobile, a bonnet, and a dash panel.

  As a car cowl structure straddling between the lower end of the front wind panel of a conventional car, the bonnet, and the dash panel, for example, the cross-sectional shape of the cowl panel holds the rear end of the bonnet from below As is known in the art, a bonnet is formed by projecting forward and holding a bonnet through a sealing member fixed to the tip of the cowl panel (prior art document 1). It has been.

JP 2009-090787 A

  However, in such a conventional technique, the vehicle hits a pedestrian or the like, and when the pedestrian or the like is pushed by a bumper, there is a possibility that the upper body of the pedestrian or the like, particularly the head, may hit the rear end of the bonnet. In such a case, when the rear end portion of the bonnet is deformed and moved downward due to an impact load generated at the rear end portion of the bonnet, the cowl panel that holds the rear end portion of the bonnet from below serves as a barrier. There is a problem of fear.

  In order to solve the above-described problems, the present invention is arranged so that when the rear end of the bonnet is deformed and moved downward due to an impact load applied from the upper end to the lower side of the rear end of the bonnet, It is an object of the present invention to provide an automobile cowl structure capable of efficiently absorbing the load without stretching the cowl panel.

  In order to solve the above-described problems, a cowl structure for an automobile according to claim 1 of the present invention is arranged between a lower end portion of a front wind panel of an automobile, a rear end portion of a bonnet, and an upper end portion of a dash panel. A cowl top cover, wherein the cowl top cover is formed so as to extend from the rear end portion of the seal mount portion to a seal mount portion that supports the rear end portion of the bonnet together with a seal material. The vertical wall portion is formed at least by a panel mounting portion supported by the upper end portion of the dash panel, and the vertical wall portion extends from the seal mounting portion at an angle in the rear lower direction. Are connected to the first inclined surface portion at the bent portion of the vertical wall portion, and extend from the first inclined surface portion to the front position of the seal placing portion in the forward and downward direction. Before A second slope portion formed by bending forward from a lower end portion of the first slope portion, a horizontal plane portion formed at the lower end portion of the second slope portion and supported on the panel rest portion, and When the load applied from the rear end portion of the bonnet is included, the load is absorbed by the bent portion between the first slope portion and the second slope portion, and the bent portion is downward in the rear portion. It is characterized by being configured to be deformed.

  Further, in the cowl structure for an automobile according to claim 2 of the present invention, the vertical wall portion according to claim 1 is formed by folding the rear end portion of the seal placing portion, the first slope portion, and the second slope portion. The vertical dimension with the curved portion is constant.

  Furthermore, in the cowl structure for an automobile according to claim 3 of the present invention, the second slope portion according to claim 1 or claim 2 is 80 degrees or more and 100 degrees or less with respect to the first slope section. It is characterized by being.

  According to the first aspect of the present invention, there is provided a cowl top cover disposed between a lower end portion of a front wind panel of an automobile, a rear end portion of a bonnet, and an upper end portion of a dash panel. The cowl top cover includes a seal mount portion that supports a rear end portion of the bonnet together with a seal material, a vertical wall portion formed to extend downward from the rear end portion of the seal mount portion, A panel mounting portion supported at the upper end portion of the dash panel; and a first slope portion formed by extending the vertical wall portion at an angle in a rear lower direction from the seal mounting portion. The bent portion of the vertical wall portion is connected to the first inclined surface portion, extends from the first inclined surface portion to the front position of the seal placing portion, and extends downward in the forward direction. The lower end of the first inclined surface portion Bend forward from the front A second inclined surface portion, and a horizontal surface portion formed on the lower end portion of the second inclined surface portion and supported on the panel mounting portion, and from the rear end portion of the bonnet When there is an applied load, the load is absorbed by the bent portion between the first slope portion and the second slope portion, and the bent portion is configured to be deformed downward in the rear portion. The impact load applied from the upper part to the lower part of the rear end part is applied to the bent part of the first slope part and the second slope part, and the bent part is elastically deformed or plastically deformed, whereby the seal mounting part. However, since the vertical wall portion does not stretch, the impact load applied from the bonnet can be efficiently absorbed.

  Further, according to the invention of claim 2, the vertical wall portion is vertically arranged between a rear end portion of the seal placing portion and bent portions of the first slope portion and the second slope portion. Since the dimensions are constant, there is an effect that the absorption level of the impact load can be kept the same no matter where the pedestrian or the like hits from the left and right center to the left and right ends of the bonnet.

  Furthermore, according to the present invention, the second inclined surface portion receives the impact load by being 80 degrees or more and 100 degrees or less with respect to the first inclined surface section. In some cases, the second inclined surface portion is easily deformed downward, and an effect is obtained in that reliable shock absorption can be achieved.

Sectional drawing which shows the cowl structure for motor vehicles concerning Example 1 of this invention, and followed the SA-SA line of FIG. The perspective view which shows the cowl top cover of FIG. The expansion perspective view of the B section of FIG. Sectional drawing equivalent to FIG. 1 which concerns on Example 2 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail. In the present invention, a cowl top cover is disposed between a lower end portion of a front wind panel of an automobile, a rear end portion of a bonnet, and an upper end portion of a dash panel, and the cowl top cover is formed of the bonnet. It is supported by a seal mounting portion that supports the rear end portion together with the sealing material, a vertical wall portion formed so as to extend downward from the rear end portion of the seal mounting portion, and an upper end portion of the dash panel. The vertical wall portion includes a first slope portion formed by extending at an angle in a rear lower direction from the seal mounting portion, and a bent portion of the vertical wall portion. It is connected to the first slope portion, extends from the first slope portion to the front position of the seal mounting portion in the forward downward direction, and is bent forward from the lower end portion of the first slope portion. Second slope And a horizontal plane portion formed on the lower end portion of the second slope portion and supported on the panel rest portion, and when there is a load applied from the rear end portion of the bonnet, Is absorbed by the bent portion between the first slope portion and the second slope portion, and the bent portion is configured to be deformed downward in the rear portion. Embodiments of the present invention will be described below with reference to the drawings.

  A structure according to the first embodiment of the present invention will be described with reference to FIGS. The cowl structure 1 for an automobile according to the first embodiment includes a lower end 2a of a front wind panel 2 of the automobile, a rear end 3a of a bonnet 3 that covers the engine room ER from above, and the engine room ER and the passenger room PR. This is a cowl top cover 6 made of a synthetic resin and disposed between the upper end portion 4a of the dash panel 4 to be partitioned.

  The cowl top cover 6 is in contact with the rear end 3a of the bonnet 3 to seal off the odor in the engine room ER (the seal material 7 in FIG. 1 is the result of the bonnet 3 closing the engine room ER, And a vertical wall portion 9 formed on the lower LWR starting from the rear end portion 8a of the seal mounting portion 8; The dash panel 4 is formed by a panel placing portion 10a at the front end of the vehicle body panel 10 supported by the upper end portion 4a of the dash panel 4.

  The vertical wall portion 9 includes a first slope portion 12 formed so as to have a predetermined angle θ1 on the rear portion RR side with respect to a perpendicular line 11 starting from the rear end portion 8a of the seal rest portion 8 and a starting point 5. It consists of the 2nd slope part 13 bent from the lower end part of the 1 slope part 12 to the front side FR. Reference numeral 14 denotes a bent portion of the second slope portion 13 that is formed at the lower end portion of the first slope portion 12.

  The vertical wall portion 9 has a vertical dimension 15 between the rear end portion 8a of the seal placing portion 8 and the bent portion 14 of the first inclined surface portion 12 and the second inclined surface portion 13, so that This is constant both at the left and right ends of the vehicle.

  For example, the angle θ1 of the first slope portion 12 at the left and right central portion of the automobile is about 45 degrees with respect to the perpendicular 11 and the angle θ1 at the left and right ends of the automobile is 25 with respect to the perpendicular 11. Make a degree. Further, the angle θ1 at the left and right ends of the automobile can be appropriately set to an angle smaller than 45 degrees with respect to the perpendicular 11. And angle (theta) 1 may be a fixed angle in the left-right center part of a motor vehicle, and the left-right edge part of a motor vehicle.

  Further, the angle θ2 formed by bending the second slope portion 13 at the front side FR with respect to the first slope portion 12 is not less than 80 degrees and not more than 100 degrees. A horizontal plane portion 16 is formed at the lower end portion of the second inclined surface portion 13 so as to ride on the panel placing portion 10 a at the front end of the vehicle body panel 10. Reference numeral 17 denotes a reinforcing rib which is continuously provided on the lower surface portion 8b of the seal placing portion 8, the front surface portion 12a of the first inclined surface portion 12, and the front surface portion 13a of the second inclined surface portion 13. is there.

  As shown in FIG. 2, the cowl top cover 6 is long in the left and right directions LH and RH, and is integrally formed, and an outside air intake 18 is formed in a bar shape.

  Next, the operation of the first embodiment will be described.

  A cowl top cover 6 disposed between a lower end portion 2a of a front wind panel 2 of an automobile, a rear end portion 3a of a bonnet 3, and an upper end portion 4a of a dash panel 4, the cowl top cover 6 being , A seal placing portion 8 formed by supporting the rear end portion 3a of the bonnet 3 via a sealing material 7, and a vertical wall formed on the lower LWR starting from the rear end portion 8a of the seal placement portion 8 Part 9 and a panel placing part 10 a supported by the upper end part 4 a of the dash panel 4. The vertical wall part 9 has a rear end part 8 a of the seal placing part 8 as a starting point 5. A first slope portion 12 formed to have a predetermined angle θ1 on the rear RR side with respect to the perpendicular line 11 and a second slope portion 13 bent at the front side FR of the first slope portion 12. Bonne by The impact load F applied from the upper side to the lower side of the rear end portion 3a of the G3 is applied to the bent portion 14 of the first inclined surface portion 12 and the second inclined surface portion 13, and the bent portion 14 is shown in FIG. As shown by the two-dot chain line, the elastic wall portion or plastic deformation causes the seal mounting portion 8 to move to the lower LWR while maintaining the horizontal state as shown in FIG. 9 is not stretched, and the impact load F applied from the bonnet 3 can be efficiently absorbed.

  Further, the vertical wall portion 9 has a constant vertical dimension 15 between the rear end portion 8a of the seal placing portion 8 and the bent portion 14 of the first slope portion 12 and the second slope portion 13. Even if a pedestrian (not shown) collides with the bonnet 3 from the left and right center to the left and right ends, the absorption level of the impact load F can be kept the same.

  Further, the first inclined surface portion 12 has a left and right central portion of the automobile facing a rear side RR of about 45 degrees with respect to the vertical line 11 and a right and left end portion of the automobile has a rear side RR of 25 degrees with respect to the vertical line 11. When a pedestrian (not shown) collides with the left and right center part of the automobile, the impact force is greatly dispersed to the left and right, and when a pedestrian (not shown) collides with the left and right ends of the automobile, Since the dispersion force of the impact force is small, there is an effect that the shock absorption value is at substantially the same level although the angle θ1 of the first inclined surface portion 12 with respect to the perpendicular 11 is different.

  Furthermore, the second inclined surface portion 13 has an angle θ2 with respect to the first inclined surface portion 12 of 80 degrees or more and 100 degrees or less, and preferably has a substantially right angle, thereby reducing the impact load F. When it is received, the second inclined surface portion 13 is easily deformed downward, and there is an effect that reliable shock absorption can be achieved. When the angle θ2 formed by the second inclined surface portion 13 with respect to the first inclined surface portion 12 is smaller than 80 degrees, the amount of protrusion of the bent portion 14 toward the vehicle rear portion RR is increased, and the degree of freedom in vehicle layout is increased. Will be limited. Further, when the angle formed by the second inclined surface portion 13 is larger than 100 degrees, the second inclined surface portion 13 tends to be stretched when an impact load is input, and the second inclined surface portion 13 is moved downward. The movement is hindered and the impact absorbing effect tends to be reduced.

  Further, the first inclined surface portion 12 and the second inclined surface portion 13 are formed with reinforcing ribs 17 so that the cowl top cover 16 is not deformed due to snow accumulation on the bonnet 3 or due to handling. Thus, there is an effect that a certain rigidity can be given.

  A structure according to Embodiment 2 of the present invention will be described with reference to FIG. The cowl structure 20 for an automobile according to the second embodiment includes a lower end 2a of the front wind panel 2 of the automobile, a rear end 3a of the bonnet 3 that covers the engine room ER from above, and the engine room ER and the passenger room PR. This is a cowl top cover 21 made of a synthetic resin and disposed between the upper end portion 4a of the dash panel 4 to be partitioned.

  The cowl top cover 21 is in contact with the rear end 3a of the bonnet 3 to seal off the odor in the engine room ER (the seal material 7 in FIG. 4 is formed by the bonnet 3 closing the engine room ER. And a vertical wall portion 22 formed on the lower LWR starting from the rear end portion 8a of the seal mounting portion 8; The dash panel 4 is formed by a panel placing portion 10a at the front end of the vehicle body panel 10 supported by the upper end portion 4a of the dash panel 4.

  The vertical wall portion 22 includes a first slope portion 12 formed so as to have a predetermined angle θ1 on the rear portion RR side with respect to a perpendicular line 11 starting from the rear end portion 8a of the seal placing portion 8 and a starting point 5. A second inclined surface portion 13 bent from the lower end portion of the first inclined surface portion 12 to the front side FR, and a bent portion formed at the lower end portion of the first inclined surface portion 12 and the upper end portion of the second inclined surface portion 13; The bent portion 14 is formed between the rear end portion 8a of the seal placing portion 8 and the upper end portion of the first inclined surface portion 12, the bent portion 14, the lower end portion of the second inclined surface portion 13, and the horizontal surface portion 16. Between the two, thin-walled fragile portions 23, 24, and 25 surrounded by circles are formed.

  Next, the operation of the second embodiment will be described.

  By forming the fragile portions 23, 24, 25 in the vertical wall portion 22, when the hood 3 receives an impact F on the bonnet 3, the fragile portions 23, 24, 25 move to the lower LWR. The amount of movement is large, and there is an effect that the shock can be reliably absorbed.

  In Examples 1 and 2, a pedestrian or the like is used. This pedestrian or the like is a concept that includes not only a case where a person is walking on the street but also a difference in a state such as joking and a case where a target such as a deer is other than a person.

DESCRIPTION OF SYMBOLS 1,20 Car cowl structure 2 Front wind panel 2a Lower end of front wind panel 3 Bonnet 3a Rear end of bonnet 4 Dash panel 4a Upper end of dash panel 5 Start point 6, 21 Cowl top cover 7 Seal material 8 Seal Placement portion 8a Rear end portion of seal placement portion 9,22 Vertical wall portion 10a Panel placement portion 11 Normal 12 First slope portion 13 Second slope portion 14 Bending portion 15 Vertical dimension 17 Reinforcement ribs 23, 24, 25 Vulnerable portion

Claims (3)

A cowl top cover arranged between a lower end portion of a front wind panel of an automobile, a rear end portion of a bonnet, and an upper end portion of a dash panel,
The cowl top cover includes a seal placing portion that supports a rear end portion of the bonnet together with a sealing material, a vertical wall portion formed to extend downward from the rear end portion of the seal placement portion, and the dash It is formed at least by a panel placing portion supported by the upper end portion of the panel,
The vertical wall portion is connected to the first slope portion at a bent portion of the vertical wall portion and a first slope portion formed by extending at an angle in the rear lower direction from the seal placing portion, A second slope portion that extends downward from the first slope portion to a front position of the seal placing portion and is bent forward from a lower end portion of the first slope portion; and the second slope portion A horizontal plane portion formed on the lower end portion of the panel and supported on the panel rest portion.
When there is a load applied from the rear end portion of the bonnet, the load is absorbed by the bent portion between the first slope portion and the second slope portion, and the bent portion is deformed downward in the rear portion. An automotive cowl structure characterized by comprising. The cowl structure for an automobile according to claim 1,
The vertical wall portion has a vertical cowl structure in which the vertical dimension of the rear end portion of the seal placing portion and the bent portion of the first slope portion and the second slope portion is constant. The automobile cowl structure according to claim 1 or 2,
The cowl structure for an automobile, wherein the second slope portion is 80 degrees or more and 100 degrees or less with respect to the first slope section.

Images