JP2004345544A - Cowl cover structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cowl cover structure capable of increasing allowed displacement for a load applied from every directions over a vehicle body and further improving load absorption efficiency. <P>SOLUTION: The cowl cover structure comprises a window shield 12 disposed in the front part of a vehicle, a cowl cover 13 bridged between it and the rear side of a hood 14 disposed in the longitudinal direction of the vehicle body in front of the window shield 12, and a vehicle body panel 11 that is erected in the substantially vertical direction of the vehicle body and is connected to the front part 13a of the cowl cover 13. The cowl cover 13 is made of a material with strength lower than that of the vehicle body panel 11, and a brittle section 13c is disposed near a connecting section 20 between the cowl cover 13 and the vehicle body panel 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a cowl cover structure provided between a hood and a window shield.
[0002]
[Prior art]
Conventionally, as a cowl cover structure of this type, for example, as shown in Patent Document 1, a space between a windshield (window shield) and a rear end of a hood (hood) disposed in front of the windshield is closed. And a front bulkhead (vehicle panel) for attaching the cowl top garnish, and a lower end of a front panel forming a front portion of the cowl top garnish. It is known that it extends downward and is detachably connected to the upper surface of the front bulkhead.
[0003]
In such a structure, when a force (load) of a predetermined value or more acts on the front panel from obliquely upward and forward, the lower end of the front panel separates from the upper surface of the front bulkhead.
[0004]
Therefore, in such a structure, during normal running, the seal member is reliably pressed against the rear end of the bonnet with relatively high rigidity, and a load equal to or more than a predetermined value is applied to the rear of the bonnet diagonally from the upper front of the vehicle body. In this case, the lower end of the front panel in the cowl top garnish is detached from the upper surface of the front bulkhead to increase the allowable displacement (crushing stroke) of the bonnet, thereby improving the load absorbing efficiency.
[0005]
[Patent Document 1]
JP-A-2002-46649 (FIG. 1)
[0006]
[Problems to be solved by the invention]
However, in the case of such a conventional structure, when a load equal to or more than a predetermined value is applied to the front panel from obliquely upward and forward, the lower end of the front panel is configured to separate from the upper surface of the front bulkhead. When a load equal to or more than a predetermined value acts on the front panel from directly above or obliquely from the rear, the lower end of the front panel is unlikely to separate from the upper surface of the front bulkhead, and it is possible to sufficiently improve the load absorption efficiency. It could be difficult.
[0007]
Even if the load acts on the front panel diagonally from the upper front, the load may be applied via the upper surface of the hood other than near the seal portion interposed between the hood and the cowl top garnish (for example, the vehicle body front of the seal portion). When a load is applied, the load transmitted to the joint between the lower end of the front panel and the upper surface of the front bulkhead is moved forward from above the vehicle body around the joint (that is, the joint of the joint is Since there is a possibility of acting as a moment rotating toward the direction (in the direction opposite to the direction in which it is released), there is a possibility that detachment of the coupling portion becomes difficult.
[0008]
Therefore, the present invention has been made in view of such a conventional problem, and an object thereof is to provide a cowl cover structure capable of increasing an allowable displacement amount with respect to a load applied from all directions above a vehicle body and further improving load absorption efficiency. With the goal.
[0009]
[Means for Solving the Problems]
According to the present invention, a cowl cover laid between a window shield disposed in a front portion of the vehicle, a hood disposed in front of the window shield in a vehicle longitudinal direction, and a substantially vertical In the cowl cover structure having a vehicle body panel that is erected in the direction and is coupled to the front portion of the cowl cover, the cowl cover is made of a material having a lower strength than the vehicle body panel. It is characterized by providing fragile parts.
[0010]
【The invention's effect】
According to the present invention, the cowl cover laid between the window shield and the back of the hood is made of a material having a lower strength than the body panel connected to the front portion of the cowl cover, and the cowl cover and the body panel are connected. By providing the fragile portion in the vicinity of the portion, the stress according to the load applied from all directions above the vehicle body can be concentrated on the fragile portion due to the difference in strength between the vehicle body panel and the cowl cover. The cowl cover structure can be provided in which the portion is broken and the crushing stroke of the hood due to the energy of the load, that is, the allowable displacement can be increased, and thus the load absorbing efficiency can be further improved.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0012]
1 to 5 show a first embodiment of a cowl cover structure according to the present invention. FIG. 1 is a perspective view showing a schematic configuration of a front portion of a vehicle body to which a cowl cover structure according to the present embodiment is applied, and FIG. FIG. 3 is an enlarged sectional view showing the SA-SA section in FIG. 1, and FIG. 3 is a sectional view showing a state where a load is applied to the cowl cover structure of FIG. FIG. 5 is a cross-sectional view showing a state in which a load is applied to the cowl cover structure from directly above the vehicle body, and FIG. 5 is a cross-sectional view showing a state in which a load is applied to the cowl cover structure of FIG. is there.
[0013]
In FIG. 1, reference numeral 10 denotes a steel dash panel, and a steel partition wall 11 serving as a vehicle body panel stands in front of the dash panel 10 in a substantially vertical direction of the vehicle body. The partition 11 is used to partition the engine room ER between the front and rear of the vehicle body to isolate heat-sensitive components from high-temperature components. At the same time, the partition 11 and the dash panel 10 form a double wall structure that separates the engine room ER from the vehicle interior. To provide heat and sound insulation.
[0014]
The partition 11 has a protruding portion 11b that projects rearward of the vehicle body so as to approach the dash panel 10 in a central portion in the vehicle width direction while the general portion 11a is separated from the dash panel 10. The upper end of the protruding portion 11b overlaps the upper end of a cowl cover 13 provided between the window shield 12 disposed at the front of the vehicle and the rear of a hood 14 (see FIG. 2) described later.
[0015]
Specifically, as shown in FIG. 2, the cowl cover structure of the present embodiment has a dash panel 10 in which a steel dash upper cross member 15 having a substantially hat-shaped cross section and extending in the vehicle width direction is joined to an upper end of the dash panel 10. Together with the panel 10, a closed cross-sectional structure extending in the vehicle width direction is formed. Above the dash upper cross member 15, the lower end of the window shield 12 is sandwiched and supported by claws 16 appropriately provided at the rear end of the cowl cover 13.
[0016]
A resin cowl cover 13 having a lower strength than the partition 11 is disposed between the window shield 12 and a hood 14 disposed in front of the window shield 12 in the vehicle front-rear direction. Is connected to the upper end of the protruding portion 11b of the partition wall 11 by a clip portion 17 as a connecting means integrally formed at the lower end portion of the front panel 13a. An upper flange 13b is provided at the upper end of the front panel 13a, and is in close contact with the rear end side of the hood 14 via a seal member 18 attached to the upward flange 13b to form a seal portion 19.
[0017]
In addition to this configuration, a fragile portion 13c is provided in the vicinity of the joint portion 20 of the front panel 13a with the upper end of the protruding portion 11b of the partition 11, and due to a difference in strength between the materials of the partition 11 and the cowl cover 13, The stress corresponding to the load applied to the fragile portion 13c from all directions above the vehicle body can be concentrated.
[0018]
Further, in the case of this embodiment, among the front panel 13a of the cowl cover 13 and the protruding portion 11b of the partition 11, at least the vicinity of the coupling portion 20 is formed in a substantially linear shape. Since the rigidity of the partition 11 can be used when inserting the partition 11b, there is no need to press the partition 11, and the insertion can be performed only by applying a force parallel to the direction in which the partition 11 is erected. Can be done.
[0019]
Further, in the case of this embodiment, the sealing portion 21 made of an elastic material is provided in the clip portion 17 of the connecting portion 20, that is, at the upper end of the protruding portion 11b, so that intrusion of water, dust, and the like can be prevented. By absorbing the vehicle body vibration such as the vibration of the partition wall 11 caused by the vibration of the engine or the like, the cowl cover 13 can be prevented from generating low noise.
[0020]
In such a cowl cover structure, for example, as shown in FIG. 3, when a load A having a predetermined value or more is applied to the hood 14 (FIG. 2) from diagonally upper front of the vehicle body, a front portion is provided via the seal 19 (FIG. 2). The stress transmitted to the panel 13a is concentrated on the fragile portion 13c due to the difference in strength between the cowl cover 13 and the material of the partition wall 11. When the fragile portion 13c is broken by the action of the moment toward the rear of the vehicle body due to the stress, the front panel 13a of the cowl cover 13 falls off from the protrusion 11b of the partition wall 11. The crush stroke, that is, the allowable displacement amount can be increased.
[0021]
Similarly, in the cowl cover structure, for example, as shown in FIG. 4, when a load B equal to or more than a predetermined value is applied to the hood 14 (FIG. 2) from directly above the vehicle body, via the seal portion 19 (FIG. 2). The stress transmitted to the front panel 13a is concentrated on the clip portion 17 due to the difference in strength between the cowl cover 13 and the material of the partition wall 11. When the clip portion 17 is broken by the moment toward the vehicle body downward due to the stress, that is, by the action of the shearing force, the front panel 13a of the cowl cover 13 falls off from the protruding portion 11b of the partition wall 11, so that the energy of the load B Of the hood 14, that is, the allowable displacement amount can be increased.
[0022]
Furthermore, in this cowl cover structure, as shown in FIG. 5, for example, when a load C of a predetermined value or more is applied to the hood 14 (FIG. 2) from diagonally above and behind the vehicle body, a front portion is provided via the seal portion 19 (FIG. 2). The stress transmitted to the panel 13a is concentrated on the fragile portion 13c due to the difference in strength between the cowl cover 13 and the material of the partition wall 11. When the fragile portion 13c is broken by the action of the moment toward the front of the vehicle body due to the stress, the front panel 13a of the cowl cover 13 falls off from the protruding portion 11b of the partition wall 11. The crush stroke, that is, the allowable displacement amount can be increased.
[0023]
As described above, in the cowl cover structure of the present embodiment, the cowl cover 13 laid between the window shield 12 and the back of the hood 14 is larger than the protrusion 11b of the partition 11 connected to the front panel 13a of the cowl cover 13. The weak portion 13c is provided in the vicinity of the joint 20 between the cowl cover 13 and the partition 11 so that the weak portion 13c is attached to the weak portion 13c due to a difference in material strength between the cowl cover 13 and the partition 11. Since the stresses corresponding to the loads A, B, and C applied from all directions above can be concentrated, the fragile portion 13c is damaged, and the crushing stroke of the hood 14 due to the energy of the loads A, B, and C, that is, The allowable displacement can be increased, and thus the load absorbing efficiency can be further improved.
[0024]
In addition, in this cowl cover structure, the front panel 13a and the protrusion 11b of the partition wall 11 can be connected by the clip portion 17 integrally formed with the connection portion 20 of the front panel 13a of the cowl cover 13, so that the number of parts can be reduced. In addition to the reduction, the production cost can be reduced accordingly.
[0025]
Further, in the cowl cover structure, at least the vicinity of the connecting portion 20 is formed in a substantially linear shape between the front panel 13 a of the cowl cover 13 and the protrusion 11 b of the partition 11, so that the clip portion 17 has the protrusion 11 b of the partition 11. At the time of insertion, the rigidity of the partition 11 can be utilized, and since there is no need to press the partition 11, the projection 11b can be inserted simply by applying a force parallel to the direction in which the partition 11 is erected. Performance can be improved.
[0026]
Further, in the cowl cover structure, the sealing portion 21 made of an elastic material is provided in the clip portion 17 of the connecting portion 20, that is, at the upper end of the protruding portion 11b. The vibration of the vehicle body such as the vibration of the partition wall 11 caused by the vibration of the vehicle body can be absorbed, and the cowl cover 13 can be prevented from generating low noise.
[0027]
Next, a second embodiment of a cowl cover structure according to the present invention will be described in detail with reference to the drawings.
[0028]
6 to 8 show a second embodiment of a cowl cover structure according to the present invention. FIG. 6 is a sectional view showing a schematic configuration of the cowl cover structure according to the present embodiment. FIG. FIG. 8 is a cross-sectional view illustrating a state where a load is applied from obliquely upper front or directly above, and FIG. 8 is a cross-sectional view illustrating a state where a load is applied to the cowl cover structure of FIG. .
[0029]
As shown in FIG. 6 in which the same reference numerals are given to portions corresponding to those in FIG. 2, in the cowl cover structure of the present embodiment, the connecting portion 20 of the front panel 13 a of the cowl cover 13 and the protrusion 11 b of the partition wall 11 The configuration is almost the same as the cowl cover structure of the first embodiment described above, except that the cowl cover structure is formed by bending toward the front.
[0030]
Specifically, the front panel 13a of the cowl cover 13 has a clip portion 17 integrally formed on the lower side of the vehicle body with respect to the fragile portion 13c. The upper end of the eleventh projecting portion 11b, which is coupled to the clip portion 17, is formed to bend toward the front of the vehicle body.
[0031]
In such a cowl cover structure, for example, as shown in FIG. 7, when a load A or B having a predetermined value or more is applied to the hood 14 (FIG. 6) from obliquely upper front or directly above the hood 14, FIG. ), The stress transmitted to the front panel 13a through the cowl cover 13 and the partition 11 has a difference in strength depending on the material, and the clip 17 at the front panel 13a and the clip at the protrusion 11b of the partition 11 The upper end connected to the portion 17 is formed by bending toward the front of the vehicle body at the fragile portion 13c, and thus concentrates on the fragile portion 13c. When the fragile portion 13c is broken by the moment toward the vehicle body downward due to the stress, that is, the action of the shearing force, the front panel 13a of the cowl cover 13 falls off from the protruding portion 11b of the partition wall 11, so that the load A or B The crushing stroke of the hood 14 due to the above energy, that is, the allowable displacement amount can be increased.
[0032]
Similarly, in the cowl cover structure, as shown in FIG. 8, for example, when a load C of a predetermined value or more is applied to the hood 14 (FIG. 6) from diagonally above and behind the vehicle body via the seal portion 19 (FIG. 6). And the stress transmitted to the front panel 13a has a strength difference depending on the material between the cowl cover 13 and the partition wall 11, and the clip portion 17 of the front panel 13a and the clip portion 17 of the protrusion 11b of the partition wall 11 Since the upper end to be connected is formed by bending toward the front of the vehicle body at the fragile portion 13c, the upper end concentrates on the fragile portion 13c. The fragile portion 13c is damaged by the action of the moment toward the front of the vehicle body due to the stress, or the projection 11b comes off from the clip portion 17 by the action of the moment, so that the front of the cowl cover 13 is separated from the projection 11b of the partition wall 11. Since the panel 13a falls off, the crush stroke of the hood 14 due to the energy of the load C, that is, the allowable displacement amount can be increased.
[0033]
As described above, in the cowl cover structure of the present embodiment, the cowl cover 13 laid between the window shield 12 and the back of the hood 14 is larger than the protrusion 11b of the partition 11 connected to the front panel 13a of the cowl cover 13. It is made of a material having low strength, and a fragile portion 13c is provided in the vicinity of the connecting portion 20 between the cowl cover 13 and the partition wall 11, and is connected to the clip portion 17 of the front panel 13a and the clip portion 17 of the protrusion 11b of the partition wall 11. Since the upper end is formed by bending toward the front of the vehicle body at the fragile portion 13c, stresses corresponding to loads A, B, and C applied from all directions above the vehicle body are further concentrated on the fragile portion 13c. Therefore, the fragile portion 13c is broken, and the energy due to the loads A, B, and C 14 collapse stroke, i.e. it is possible to increase the allowable displacement amount, thus it is possible to further improve the load absorbing efficiency.
[0034]
Although the engine mount structure of the vehicle according to the present invention has been described by taking the first and second embodiments as examples, the present invention is not limited to this, and various implementations are possible without departing from the gist of the present invention. A form can be adopted.
[0035]
For example, in the above-described first embodiment, a case has been described in which the clip portion 17 as the coupling means is integrally formed with the coupling portion 20 on the front panel 13a of the cowl cover 13. It may be formed integrally with the upper end of the protrusion 11b.
[0036]
Further, in the first and second embodiments described above, the case where the clip portion 17 is applied as the coupling means has been described. However, the present invention is not limited to this, and various other types of coupling means may be used. Things can be widely applied.
[0037]
Furthermore, in the above-described second embodiment, the upper end of the clip portion 17 of the front panel 13a and the clip portion 17 of the protruding portion 11b of the partition wall 11 that are bent toward the front of the vehicle body at the weak portion 13c are formed. However, the present invention is not limited to this, and the upper end of the clip portion 17 of the front panel 13a and the clip portion 17 of the protruding portion 11b of the partition wall 11 that faces the vehicle body at the weak portion 13c. It may be formed by bending. Also in this case, the same effect as in the case where the vehicle body is bent forward can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a schematic configuration of a front portion of a vehicle body to which a cowl cover structure according to a first embodiment of the present invention is applied.
FIG. 2 is an enlarged sectional view showing a SA-SA section of the vehicle body in FIG. 1;
3 is a cross-sectional view showing a state where a load is applied to the cowl cover structure of FIG. 2 from diagonally upper front of the vehicle body.
4 is a cross-sectional view showing a state where a load is applied to the cowl cover structure of FIG. 2 from directly above the vehicle body.
FIG. 5 is a cross-sectional view showing a state where a load is applied to the cowl cover structure of FIG. 2 from obliquely upper rear of the vehicle body.
FIG. 6 is an enlarged sectional view showing a cowl cover structure according to a second embodiment of the present invention.
FIG. 7 is a cross-sectional view illustrating a state where a load is applied to the cowl cover structure of FIG. 6 from obliquely upper front or right above the vehicle body.
8 is a cross-sectional view showing a state where a load is applied to the cowl cover structure of FIG. 6 from obliquely upper rear of the vehicle body.
[Explanation of symbols]
10 dash panel 11 partition wall (body panel)
11b Projecting portion 12 Window shield 13 Cowl cover 13a Front panel (front)
13c fragile part 14 hood 17 clip part (coupling means)
20: coupling portions 19, 21: seal portions A, B, C: load

Claims (5)

A window shield disposed at the front of the vehicle, a cowl cover straddling between a window hood disposed in front of the window shield and a hood rear disposed in the vehicle longitudinal direction, and standing upright in a substantially vertical direction of the vehicle body; In a cowl cover structure having a body panel coupled to a front portion of the cowl cover,
The cowl cover is made of a material having lower strength than the body panel,
A cowl cover structure provided with a fragile portion near a joint between the cowl cover and the vehicle body panel. The cowl cover structure according to claim 1, wherein a connecting means is integrally formed with a front portion of the cowl cover or the connecting portion of the vehicle body panel. 3. The cowl cover structure according to claim 2, wherein at least the vicinity of the joint between the front portion of the cowl cover and the vehicle body panel is substantially linear. The cowl cover structure according to claim 1 or 2, wherein the connecting portion is bent toward the front or rear of the vehicle body. The cowl cover structure according to any one of claims 1 to 4, wherein a seal portion made of an elastic material is provided at the coupling portion.

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