JP2023000229A - vehicle front structure - Google Patents

Abstract

To provide a vehicle front structure which can easily secure rigidity required for vibration suppression while achieving pedestrian protection.SOLUTION: A vehicle front part 1 having a vehicle front structure includes a cowl part 4, a cowl top garnish 5, a reinforcement member 6, and a support member 7. The support member 7 has a fixed part 71 fixed to the reinforcement member 6, a connection part 72 connected to the cowl top garnish 5, and an extension part 73. The extension part 73 has a lower extension piece 73a continuously extending to the vehicle upper part from one end in a vehicle longitudinal direction in the fixed part 71, and an upper extension piece 73b continuously extending from the other end in the vehicle longitudinal direction in the connection part 72 so as to extend the connection part 72, and is bent in the vehicle longitudinal direction in a connection part 73c between the lower extension piece 73a and the upper extension piece 73b. A width of the vehicle width direction in the upper extension piece 73b is set so as to be narrower than the with in the vehicle width direction in the lower extension piece 73a.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle front structure including a cowl portion and a cowl top garnish.

Generally, in a vehicle front structure, a cowl portion has an opening that opens upwardly of the vehicle and is arranged along the lower portion of the windshield, and the opening of the cowl portion is covered with a cowl top garnish. A wiper driving section having a motor, links, etc., for driving the wiper for wiping the windshield is arranged in the cowl section. In the conventional vehicle front structure, for example, from the viewpoint of protection of pedestrians, the cowl top garnish or the like is provided with a structure for mitigating the impact when an impact load is applied from above. It has been proposed to improve the protection performance.

As an example of the vehicle front structure, a structure described in Patent Document 1 is known. In the structure described in Patent Document 1, the motor is supported by inserting support pins protruding forward from the motor of the wiper driving portion into support holes of a mounting bracket attached to the cowl front wall portion. . When an impact load is applied to the cowl louvers as the cowl top garnish, the motor is directly pushed downward over the cowl louvers by the impact load. At this time, the rising portion of the lower edge of the support hole in the mounting bracket is buckled and deformed, and the support pin falls out of the mounting bracket, thereby dropping the motor. As a result, impact is mitigated, and pedestrian protection performance is improved.

JP 2014-189258 A

However, in the structure described in Patent Document 1, in order to mitigate the impact, the support pins of the motor are reliably removed from the mounting bracket (that is, the cowl portion) attached to the cowl front wall portion according to the impact load. You need structure. Since the structure described in Patent Document 1 is based on the premise that the support pins will fall off, the support rigidity (mounting rigidity) of the motor decreases due to this structure for falling off. As a result, the motor tends to vibrate during normal running. In other words, in the structure described in Patent Literature 1, the supporting rigidity (mounting rigidity) of the parts is lowered due to the structure for mitigating the impact, and there is a high possibility that an increase in vibration will occur.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a vehicle front structure that can easily secure the rigidity necessary for suppressing vibration while protecting pedestrians in the event of a collision.

In order to achieve the above object, according to one aspect of the present invention, the vehicle includes a cowl portion having an opening opening upwardly of the vehicle and arranged along the lower portion of the windshield, and a cowl top garnish covering the opening. A vehicle front structure is provided. This vehicle front structure includes a reinforcing member that extends in the vehicle longitudinal direction in the cowl portion and reinforces the cowl portion, a fixing portion that is fixed to the reinforcing member, a connecting portion that is connected to the cowl top garnish, and the fixing portion. a support member having an extension portion extending from a portion to the connection portion and supporting the cowl top garnish from below. The extending portion includes a lower extending piece that extends upwardly of the vehicle continuously from one end of the fixed portion in the vehicle front-rear direction, and a lower extending piece that extends from the other end of the connecting portion in the vehicle front-rear direction to extend the connecting portion. It has an upper extension piece that extends in such a manner as to extend so as to bend in the vehicle front-rear direction at a connecting portion between the lower extension piece and the upper extension piece. The width of the upper extension piece in the vehicle width direction is set narrower than the width of the lower extension piece in the vehicle width direction.

In the vehicle front structure according to one aspect of the present invention, the cowl portion is reinforced by the reinforcing member extending in the longitudinal direction of the vehicle inside the cowl portion, and the cowl top garnish covering the opening of the cowl portion is fixed to the reinforcing member. It is supported from below by a support member having a fixing portion that is attached to the cowl top garnish, a connecting portion that is connected to the cowl top garnish, and an extension portion that extends from the fixing portion to the connecting portion. As a result, the cowl top garnish, which is a member elongated in the vehicle width direction, is reliably supported from below by the support member. In addition, the extending portion of the support member extends from one end of the fixed portion in the vehicle front-rear direction and extends toward the upper side of the vehicle, and the connecting portion continues from the other end of the connecting portion in the vehicle front-rear direction to extend the connecting portion. and is bent in the vehicle front-rear direction at the connecting portion between the lower extension piece and the upper extension piece. It is formed in an S shape or a generally flattened Z shape. Therefore, when an impact load is applied to the cowl top garnish from above, the extended portion of the support member is further bent and deformed to absorb part of the impact energy and reduce the impact on pedestrians. , Pedestrian protection at the time of collision is achieved.

Since the width of the upper extension piece in the vehicle width direction is set narrower than the width of the lower extension piece in the vehicle width direction, the strength of the portion on the upper extension side of the extension portion is the strength of the portion on the lower extension side of the extension portion. lower. As a result, when an impact load is applied to the cowl top garnish, the portion of the support member including the upper extending piece can be mainly deformed. Therefore, in the extending portion of the support member, the main deformation portion and the hard-to-deform high-rigidity portion are vertically divided, and the distance between the main deformation portion and the high-rigidity portion and the distance between the main deformation portion and the reinforcing member are calculated. Sufficient distance is ensured between As a result, it is possible to prevent further deformation of the deformed portion from being suppressed (so-called bottoming out) due to the deformed portion coming into contact with a high-rigidity portion or a reinforcing member, etc., ensuring a sufficient deformation amount of the deformed portion. , effectively absorb impact energy and effectively improve pedestrian protection performance. In addition, since the structure absorbs a portion of the impact energy by deforming the extended portion of the support member at the time of a collision, the support rigidity required to suppress the vibration of the cowl top garnish can be easily obtained during normal driving. can be secured to As for the wiper drive section including the wiper motor that can be arranged in the cowl section, it is necessary to suppress the vibration of the wiper parts during normal running by simply adopting a structure that is held using a reinforcing member or the like. sufficient support rigidity is easily ensured.

In this way, it is possible to provide a vehicle front structure that can easily secure the rigidity necessary for suppressing vibration while protecting pedestrians in the event of a collision.

BRIEF DESCRIPTION OF THE DRAWINGS It is the perspective view which looked at the vehicle front part to which the vehicle front part structure which concerns on embodiment of this invention is applied from the vehicle front side diagonally upper direction. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1; FIG. 4 is a partial enlarged view of a main part including a reinforcing member and a supporting member in the cowl portion of the vehicle front portion as viewed from above the vehicle; 3 is a partially enlarged perspective view of the vehicle front portion; FIG. It is the front view which looked at the said reinforcement member and the support member from the vehicle front. It is the side view which looked at the said reinforcement member and the support member from the side of the vehicle width direction. FIG. 5 is a cross-sectional view taken along the line BB in FIG. 4;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 4 show a vehicle front structure according to one embodiment of the present invention. In the drawings, the direction of arrow Fr indicates the front of the vehicle in the longitudinal direction of the vehicle, the direction of arrow O indicates the outer side of the vehicle in the width direction of the vehicle, and the direction of arrow U indicates the upper direction of the vehicle in the vertical direction of the vehicle. 4, the wiper 8 and the pivot shaft portion 92, which will be described later, are removed.

As shown in FIGS. 1 to 4, a vehicle front portion 1 to which the vehicle front portion structure according to the embodiment of the present invention is applied is opened and closed by a front hood (not shown) that is rotatable in the vertical direction of the vehicle. An engine room E is provided, and a compartment R is provided behind the engine room E in the vehicle. An engine room E and a vehicle room R are separated by a dash panel 2. - 特許庁The dash panel 2 extends over the entirety of the engine room E in the vehicle width direction. In this embodiment, the windshield 3 is arranged along the upper edge of the dash panel 2 .

The vehicle front portion 1 of this embodiment includes a cowl portion 4 , a cowl top garnish 5 , a reinforcing member 6 and a supporting member 7 . For example, the cowl portion 4, the reinforcement member 6 and the support member 7 are made of thin metal plates, and the cowl top garnish 5 is made of a resin member.

The cowl portion 4 has an opening 4 a that opens upwardly of the vehicle and is arranged along the lower portion of the windshield 3 . The cowl portion 4 extends in the width direction of the vehicle and has a substantially concave cross section (in other words, a groove cross-sectional structure) that opens upwardly of the vehicle. In this embodiment, part of the cowl portion 4 is configured using part of the dash panel 2 . Specifically, the cowl portion 4 is composed of a windshield support portion 41 including the upper end portion of the dash panel 2 and a cowl top 42 arranged in front of the windshield support portion 41 with respect to the vehicle.

More specifically, the windshield support portion 41 includes a support wall 41a formed along the lower portion of the surface of the windshield 3 on the vehicle interior R side, and a support wall 41a that is continuous with the lower end of the support wall 41a and bulges toward the vehicle interior R side. and a bulging portion 41b formed in the . A lower end portion of the support wall 41 a extends in the vertical direction of the vehicle and protrudes below the lower end of the windshield 3 . A portion on the lower end side of the bulging portion 41b is formed as a forwardly downward inclined portion 41b1 that is inclined away from the opening portion 4a toward the front of the vehicle. The remaining portion of the dash panel 2 is formed so as to extend generally downward of the vehicle so as to be continuous with the lower end of the inclined portion 41b1. Further, the cowl top 42 has, for example, a bottom wall portion 42a forming the bottom wall of the cowl portion 4 and an inclined portion 42b that generally rises forward from the front end of the bottom wall portion 42a. The front edge portion 42c of the cowl portion 4 (in other words, the upper end portion of the inclined portion 42b of the cowl top 42) is located below the lower end of the support wall 41a of the windshield support portion 41, and the cowl portion 4 constitutes an opening edge on the front side of the vehicle of the opening 4a.

A wiper driving portion 9 (see FIG. 3, etc.) for driving a pair of left and right wipers 8, 8 for wiping the windshield 3 is arranged in the cowl portion 4. As shown in FIG. The wiper driving portion 9 is configured as a unit that is long in the vehicle width direction as a whole, and the wiper fixing portions 9a forming each end portion in the vehicle width direction are attached to the portion of the cowl portion 4 on the vehicle body side via bolts 10. Fixed. The wiper drive unit 9 is arranged closer to the driver's seat side in the vehicle width direction, and the end portion on the side opposite to the driver's seat is generally positioned near the center portion in the vehicle width direction. 2 and 3 show a portion of the wiper driving portion 9 including the end portion opposite to the driver's seat. In the present embodiment, the wiper fixing portion 9a of the wiper driving portion 9 on the side opposite to the driver's seat is located in a region on the side opposite to the driver's seat in the vehicle width direction beyond the center line X (central portion) in the vehicle width direction. positioned.

The wiper driving portion 9 in the cowl portion 4 includes a rod-shaped stay 91 extending in the vehicle width direction, an electric motor (not shown) as a drive source fixed to the central portion of the stay 91 , and both ends of the stay 91 . and a link mechanism 93 for transmitting the power of the electric motor to the corresponding pivot shaft portion 92 . 3 shows the end of the stay 91 opposite to the driver's seat, the pivot shaft 92 opposite to the driver's seat, and part of the link mechanism 93 opposite to the driver's seat.

The cowl top garnish 5 is a member that covers the opening 4 a of the cowl portion 4 . In this embodiment, the cowl top garnish 5 includes an upper wall portion 51 extending generally forward along the lower portion of the windshield 3 and a front end portion extending from the front end of the upper wall portion 51 to the front edge portion 42 c of the cowl top 42 . and a wall portion 52 .

More specifically, a receiving portion 51a (see FIG. 2) that receives the lower end portion of the windshield 3 is formed in the rear edge portion of the upper wall portion 51. The center portion of the upper wall portion 51 in the vehicle width direction The seat-side portion is formed with a concave portion 51b (see FIGS. 1, 3 and 4) that is recessed to allow the wiper 8 to rotate. The recessed portion 51b forms a substantially triangular pyramidal region that allows the wiper 8 to rotate, and protrudes downward from the vehicle. The front wall portion 52 is inclined so as to be substantially parallel to the inclined portion 42 b of the cowl top 42 of the cowl portion 4 . Mounting holes (not shown) are formed in a plurality of locations spaced apart in the vehicle width direction on the lower end of the front wall portion 52 of the cowl top garnish 5 . Resin fittings 53 (see FIG. 4) inserted through the respective mounting holes are inserted into holes (not shown) opened in the front edge portion 42c of the cowl portion 4 and locked to the cowl portion 4. As a result, the cowl top garnish 5 is attached to the front edge portion 42c of the cowl portion 4. As shown in FIG.

The cowl top garnish 5 is provided with a shaft portion hole 51c (see FIG. 4) through which the pivot shaft portion 92 is inserted. Specifically, the wall surface portion of each recess 51b on the windshield 3 side is inclined so as to be substantially parallel to the windshield 3, and the axial hole 51c is formed in the wall surface portion near the top (bottom) of the recess 51b. is open. A tip portion of the pivot shaft portion 92 protrudes upward from the upper wall portion 51 of the cowl top garnish 5 through the shaft portion hole 51c, and a base end portion of the wiper 8 is attached to the tip portion.

In this embodiment, a water receiving portion 94 formed to surround the pivot shaft portion 92 is provided below the shaft portion hole 51c. The water receiving portion 94 is made of, for example, a resin member and is formed integrally with the base end portion of a resin pivot holder 95 provided around the pivot shaft portion 92 so as to hold the pivot shaft portion 92 . The water receiving portion 94 receives rainwater or the like that has entered the cowl portion 4 through the gap between the shaft portion hole 51 c of the cowl top garnish 5 and the pivot shaft portion 92 . It is configured to drop water toward a predetermined position within the cowl portion 4 .

Specifically, the water receiver 94 is formed in a curved shape as a whole around the base of the pivot holder 95 so as to cover the end of the stay 91 and part of the link mechanism 93 from above. The water receiving portion 94 has an upper receiving portion 94a above the base end portion of the pivot shaft portion 92 and a lower receiving portion 94b below the base end portion. A water stop wall 94c is formed to protrude upward from the upper edge and both edges of the water receiving portion 94 in the longitudinal direction of the vehicle, and the lower edge of the water receiving portion 94 is open downward. As a result, the members of the wiper driving portion 9 are prevented from being wet with rainwater or the like that has entered through the shaft portion hole 51c of the cowl top garnish 5 .

The reinforcing member 6 is a member that extends in the longitudinal direction of the vehicle inside the cowl portion 4 and reinforces the cowl portion 4 . The reinforcement member 6 is provided, for example, in the vicinity of the center portion in the vehicle width direction in the cowl portion 4, between the windshield support portion 41 (portion on the lower end side of the support wall 41a) and the cowl top 42 (bottom wall portion 42a). It is installed between them (in other words, between the upper end portion of the dash panel 2 and the cowl top 42). In this embodiment, the reinforcing member 6 is located in the vicinity of the center line X in the width direction of the vehicle and in the region opposite to the driver's seat.

The reinforcement member 6 has a reinforcement main body portion 61 which is arranged in an inclined posture so as to approach the cowl top garnish 5 toward the rear of the vehicle, and to which a fixing portion 71 of the support member 7 (to be described later) is fixed. The rear end portion of the reinforcement body portion 61 is joined to the support wall 41a, and the front end portion of the reinforcement body portion 61 is joined to the bottom wall portion 42a. A wiper fixing portion 9 a of the wiper driving portion 9 on the side opposite to the driver's seat is fixed to the rear end side (upper end side) of the reinforcing member 6 via a bolt 10 . Although not shown, the wiper fixing portion 9a on the driver's seat side of the wiper driving portion 9 is fixed to the side panel of the cowl portion 4 via bolts 10. As shown in FIG. As a result, the wiper driving portion 9 including the electric motor is reliably supported by the cowl portion 4 . As described above, the wiper driving portion 9 is held by the reinforcing member 6 and part of the cowl portion 4 (the side panel). Support rigidity required for restraint is easily ensured.

5 is a front view of the reinforcing member 6 and the supporting member 7 viewed from the front of the vehicle, and FIG. 6 is a side view of the reinforcing member 6 and the supporting member 7 viewed from the side in the vehicle width direction. FIG. 7 is a cross-sectional view taken along line BB in FIG. 5 and 6, illustration of members other than the reinforcing member 6 and the supporting member 7 in the vehicle front portion 1 is omitted.

As shown in FIGS. 5 and 6, the support member 7 includes a fixing portion 71 fixed to the reinforcing member 6, a connecting portion 72 connected to the cowl top garnish 5, and an extending portion extending from the fixing portion 71 to the connecting portion 72. 73 and supports the cowl top garnish 5 from below. As a result, the cowl top garnish 5, which is a member elongated in the vehicle width direction, is reliably supported by the support member 7 from below.

The support member 7 is joined to the upper surface of the reinforcing member 6 (reinforcing main body portion 61) at a substantially central portion in the longitudinal direction, and extends upward from the central portion. The supporting member 7 is made of a thin metal plate material, and a fixing portion 71, a connecting portion 72 and an extending portion 73 are integrally formed by press molding or the like.

The fixed portion 71 is a portion of the support member 7 fixed to the reinforcing member 6 . Here, the fixed portion 71 is fixed to the reinforcing member 6 by being joined to the reinforcing member 6 by spot welding or the like.

The connecting portion 72 forms a portion of the support member 7 that is connected to the cowl top garnish 5 . Specifically, the support member 7 (that is, the connecting portion 72) is connected to the back surface (lower surface) of the portion corresponding to the center portion in the vehicle width direction of the recessed portion 51b on the center line X side of the cowl top garnish 5. . The metal connecting portion 72 and the resin cowl top garnish 5 are connected by a connecting tool 54 (see FIGS. 2 and 4) made of a resin clip. As shown in FIG. 7, the connector 54 includes a disk-shaped head portion 54a, a rod-shaped clip shaft portion 54b projecting from the back surface of the head portion 54a, and a portion on the tip side of the clip shaft portion 54b. , and has a connection claw portion 54c for connection (locking) formed in a tapered shape so as to be elastically deformable.

The extending portion 73 is a portion extending from the fixing portion 71 to the connecting portion 72 as described above. The shape of each portion (fixed portion 71, connecting portion 72, extending portion 73) of the support member 7 will be described later in detail.

The cowl top garnish 5 is provided with a coupling hole 51d (see FIG. 7) through which a coupling 54 for coupling with the coupling portion 72 of the support member 7 is inserted. Specifically, a connecting tool hole 51d is opened in a wall surface portion on the windshield 3 side of the concave portion 51b on the center line X side. A seat surface portion 51e protruding downward is formed in the cowl top garnish 5 around the connector hole 51d. The coupling portion 72 abuts on the seat surface portion 51e, so that the longitudinal central portion of the cowl top garnish 5 is supported from below. Specifically, regarding the positional relationship in the vehicle width direction, the connector hole 51d is positioned between the pivot shaft portion 92 on the center line X side and the reinforcing main body portion 61 of the reinforcing member 6 (in other words, on the side opposite to the driver's seat). and the end of the wiper fixing portion 9a on the side opposite to the driver's seat). The connecting portion 72 of the support member 7 also has an insertion hole 72a through which the connecting member 54 is inserted. The connecting claw 54c of the connecting tool 54 is engaged with the connecting part 72 in a state in which the connecting tool 54 inserted through the connecting tool hole 51d of the cowl top garnish 5 is inserted into the insertion hole 72a of the connecting part 72 of the support member 7. By stopping, the cowl top garnish 5 and the support member 7 are connected (fastened).

Next, the shape of each part of the support member 7 will be described in detail.

The fixed portion 71 of the support member 7 is formed, for example, in a substantially trapezoidal shape in a plan view, and is arranged with the trapezoidal base directed toward the rear of the vehicle. Specifically, the fixing portion 71 is joined to the reinforcing member 6 in such a posture that one oblique side of the trapezoid is parallel to the vehicle width direction.

The connecting portion 72 has a flat surface that abuts against the rear surface (specifically, the seat surface portion 51e) of the inclined wall surface portion on the windshield 3 side of the cowl top garnish 5, and the flat surface is the above-mentioned surface. It is connected to the cowl top garnish 5 via a connector 54 while being in contact with the back surface of the wall surface. The flat surface of the connecting portion 72 extends parallel to the upper surface of the reinforcing body portion 61 of the reinforcing member 6 . The connecting portion 72 (the flat surface) is in a forward-downward position while being in contact with the cowl top garnish 5 . Specifically, the connecting portion 72 is inclined at an angle of approximately 45° with respect to the running surface (horizontal plane) of the vehicle, and its upper surface faces forward of the vehicle. The seat surface portion 51 e of the cowl top garnish 5 and the reinforcing main body portion 61 of the reinforcing member 6 are also inclined in the same manner as the connecting portion 72 .

In the present embodiment, the connecting portion 72 has flange portions 72b (hereinafter referred to as first reinforcing flange portions 72b) that protrude downward in the vehicle at both edges thereof in the vehicle width direction. That is, the connecting portion 72 is formed as a portion having high rigidity by bending downward both edge portions of the flat plate portion forming the flat surface.

The extending portion 73 includes a lower extending piece 73a that extends upwardly of the vehicle from one end of the fixing portion 71 in the vehicle front-rear direction, and the connecting portion 72 that extends from the other end of the connecting portion 72 in the vehicle front-rear direction. It has an elongated upper extension piece 73b, and is bent in the vehicle front-rear direction at a connecting portion 73c between the lower extension piece 73a and the upper extension piece 73b.

In the present embodiment, the extending portion 73 extends from the rear end of the fixed portion 71 in the vehicle front-rear direction to the front end of the connecting portion 72 in the vehicle front-rear direction. Specifically, the lower extending piece 73a extends generally upward continuously from the rear end of the fixing portion 71 (the base of the trapezoid), and the upper extending piece 73b extends continuously from the front end of the connecting portion 72 to the connecting portion. It extends generally parallel to 72 . The extending portion 73 is, for example, bent such that its upper end portion is bent toward the rear of the vehicle. In other words, in the present embodiment, the extending portion 73 is bent starting from the connecting portion 73c so that the upper extending piece 73b faces toward the rear of the vehicle. Portions of the lower extension piece 73a and the upper extension piece 73b on the connecting portion 73c side are smoothly curved. The support member 7 is formed in a generally flat S-shape (in other words, a generally flat Z-shape) as a whole when viewed from the side in the vehicle width direction.

The width of the upper extension piece 73b in the vehicle width direction is set narrower than the width of the lower extension piece 73a in the vehicle width direction. Specifically, when the extension portion 73 is viewed from the front of the vehicle, the lower extension piece 73a is formed in a trapezoidal shape that widens toward the bottom, and the upper extension piece 73b has a width narrower than that of the lower extension piece 73a. and is formed in a generally rectangular shape. That is, the strength of the portion of the extension portion 73 on the upper extension piece 73b side is set lower than the strength of the portion of the extension portion 73 on the lower extension piece 73a side.

In the present embodiment, the extending portion 73 of the support member 7 extends obliquely to one side in the vehicle width direction. In other words, as shown in FIG. 5, the width direction of the reinforcement member 6 (reinforcement main body portion 61) increases as the center line X1 passing through the center of the extension portion 73 in the width direction moves upward in a front view from the front of the vehicle. The extending portion 73 extends obliquely away from the center line X2 passing through the center toward the driver's seat (the center line X side of the vehicle in this embodiment, the left side in FIG. 5).

In the present embodiment, a reinforcing flange portion 73d (hereinafter referred to as a second reinforcing flange portion 73d) is formed on one edge portion of the extension portion 73 in the vehicle width direction and protrudes downward of the vehicle. The second reinforcing flange portion 73d is provided, for example, at the edge portion (the one edge portion) on the side opposite to the driver's seat in the vehicle width direction of the extension portion 73, and is located on the driver's seat side in the vehicle width direction of the extension portion 73. edge (the other edge). As a result, the strength of the portion of the extending portion 73 on the side of the second reinforcing flange portion 73d becomes higher than the strength of the portion of the extending portion 73 on the side opposite to the second reinforcing flange portion 73d. Differences occur. Specifically, the second reinforcing flange portion 73d is formed over the entire right edge of the extending portion 73 in FIG. 5, and is not formed on the left edge of the extending portion 73. The second reinforcing flange portion 73d is inclined with respect to the center line X2 of the reinforcing member 6 (reinforcing main body portion 61), similarly to the center line X1 of the extending portion 73. As shown in FIG. When viewed from the front of the vehicle, the left edge of the lower extending piece 73a extends substantially parallel to the center line X2 of the reinforcing member 6, and the left edge of the upper extending piece 73b is the second reinforcing flange. 73d (in other words, it is inclined with respect to the center line X2).

In this embodiment, the one edge portion of the lower extending piece 73a extends in a direction substantially perpendicular to the upper surface of the reinforcing body portion 61, and the other edge portion of the lower extending piece 73a in the vehicle width direction is the reinforcing body portion. It extends in a direction forming an acute angle with the upper surface of 61 . That is, in a side view in the vehicle width direction, the one edge portion of the lower extending piece 73a on which the second reinforcing flange portion 73d is formed extends in a direction substantially perpendicular to the upper surface of the reinforcing main body portion 61. . The other edge portion of the lower extending piece 73a where the second reinforcing flange portion 73d is not formed is formed so as to be inclined at an acute angle with respect to the upper surface of the reinforcing main body portion 61. Specifically, Specifically, it extends at an inclination angle of approximately 45° (in other words, an angle approximately perpendicular to the running surface of the vehicle) with respect to the surface of the upper surface of the reinforcing body portion 61 that includes the surface facing the connecting portion 72. doing. As a result, the difference in the strength of the extending portion 73 in the width direction is remarkable. In other words, the angle formed by the other edge of the lower extension piece 73a and the upper surface of the reinforcement main body 61 when viewed from the side in the vehicle width direction is It is smaller than the angle with the upper surface of 61.

In the present embodiment, as shown in FIG. 5, the extending portion 73 has a plurality of beads (a first bead portion 75a, a second bead portion 75b, and a third bead portion 75c) extending in the longitudinal direction of the extending portion 73. is formed. Each bead (75a-75c) is formed by, for example, press molding so as to protrude upward from the vehicle.

The first bead portion 75a is formed in the center portion of the extending portion 73 in the vehicle width direction, and extends from the lower end of the extending portion 73 to a predetermined position on the upper extending piece 73b. The upper extending piece 73b is divided into a flat portion continuous with the flat surface of the connecting portion 72 and having a surface parallel to the flat surface and a curved portion on the connecting portion 73c side. For example, it is positioned at the boundary between the flat portion and the curved portion of the upper extending piece 73b.

The second bead portion 75b is formed in a portion of the extending portion 73 on the one edge side (that is, on the side of the second reinforcing flange portion 73d), and extends from the lower end of the extending portion 73 to a predetermined position on the upper extending piece 73b. exist. The upper end of the second bead portion 75b is positioned, for example, at the curved portion of the upper extending piece 73b. In the figure, the longitudinal length of the second bead portion 75b (second bead length) is shorter than the longitudinal length of the first bead portion 75a (first bead length). The length may match the first bead length (ie, the first bead length≧the second bead length).

The third bead portion 75c is formed in a portion of the extending portion 73 on the other edge portion side (that is, the side opposite to the second reinforcing flange portion 73d), and is located at a predetermined position from the lower end of the extending portion 73 to the connecting portion 73c. extends to the position of The upper end of the third bead portion 75c is positioned, for example, in the vicinity of the connecting portion 73c. That is, the longitudinal length of the third bead portion 75c (third bead length) is shorter than the longitudinal length of the second bead portion 75b (second bead length). Therefore, there is a relationship of size: first bead length≧second bead length>first bead length.

The number of beads formed in the portion of the extending portion 73 below the connecting portion 73c is greater than the number of beads formed in the portion of the extending portion 73 above the connecting portion 73c.

The first reinforcing flange portion 72b on the side of the other edge portion in the vehicle width direction of the connecting portion 72 (that is, the side opposite to the second reinforcing flange portion 73d) is linear in the vehicle front-rear direction and parallel to the vehicle front-rear direction. is stretched. The first reinforcement flange portion 72b on the one edge side (that is, the second reinforcement flange portion 73d side) of the connecting portion 72 in the vehicle width direction extends continuously with the second reinforcement flange portion 73d to provide reinforcement. It is obliquely inclined with respect to the center line X2 of the member 6 .

The first reinforcing flange portion 72b on the other edge side protrudes outward from the other edge portion of the extension portion 73 in the vehicle width direction (that is, the edge portion on the left side of the extension portion 73 in FIG. 5), It is formed so as to be discontinued at the boundary position with the extending portion 73 . That is, the first reinforcing flange portion 72b on the other edge portion side is not continuous with the upper extending piece 73b of the extending portion 73 . The end portion (lower end portion/vehicle front end portion) of the first reinforcement flange portion 72b on the other edge portion side on the extension portion 73 side is located further than the other edge portion of the extension portion 73 in the vehicle width direction. It is formed as a corner portion 72b1 protruding outward (to the left in FIG. 5).

Next, the pedestrian protection performance of the vehicle front portion 1 to which the vehicle front portion structure of the present embodiment is applied will be described by taking as an example the case where an impact load is applied to the cowl top garnish 5 from above. 2 and 6, the impact load is applied to the cowl top garnish 5 and the support member 7 diagonally downward from the front of the vehicle (approximately diagonally at 45° to the vertical direction). It acts on the cowl top garnish 5 and the support member 7 as a pressing load.

When an impact load is applied to the cowl top garnish 5, the extended portion 73 of the support member 7 bends starting from the connection portion 73c, thereby absorbing part of the impact energy. As a result, the impact on pedestrians is reduced, and pedestrian protection is achieved in the event of a collision. Specifically, since the width of the upper extension piece 73b in the vehicle width direction is set narrower than the width of the lower extension piece 73a in the vehicle width direction, when an impact load is applied to the cowl top garnish, the support member 7 is The portion including the upper extending piece 73b can be mainly deformed (displaced so as to bend downward).

Specifically, as shown in FIG. 6 , when the connecting portion 72 of the support member 7 receives an impact load, the connecting portion 72 itself having high rigidity does not deform, and the connecting portion 72 is mainly formed on the upper surface of the reinforcing main body portion 61 . , and the upper extending piece 73b deforms so as to bend downward starting from the connecting portion 73c. At this time, the portion of the support member 7 extending from the connecting portion 72 to the upper extending piece 73b as a whole is greatly deformed into a V-shape that protrudes downward, and the upper half of the support member 7 is deformed into a Z-shape. , the high-rigidity portion of the support member 7 below the connecting portion 73c is not greatly deformed. That is, the main deformation portion and the hard-to-deform high-rigidity portion are vertically divided in the extension portion 73 of the support member 7, and the distance between the main deformation portion and the high-rigidity portion and the distance between the main deformation portion and the main deformation portion are determined. A sufficient distance to the reinforcing member 6 is ensured. As a result, further deformation of the deformed portion is prevented from being suppressed (so-called bottoming out) due to the deformed portion coming into contact with the high-rigidity portion or the reinforcing member 6, etc., and a sufficient amount of deformation of the deformed portion is ensured. As a result, impact energy is effectively absorbed, and pedestrian protection performance is effectively improved.

In addition, since the structure absorbs a part of the impact energy by deforming the extending portion 73 of the support member 7 at the time of a collision, the cowl top garnish 5 is provided with the necessary support to suppress vibration during normal running. Rigidity can be easily secured. As for the wiper driving section 9 including the electric motor for the wiper disposed in the cowl section 4, by simply adopting a structure in which the reinforcing member 6 and the side panel of the cowl section 4 are used to hold the wiper driving section 9, normal running is possible. In some cases, the support rigidity necessary for suppressing the vibration of the wiper driving portion 9 is easily ensured.

As described above, the vehicle front portion 1 having the vehicle front portion structure according to the present embodiment can easily secure the rigidity necessary for suppressing vibration while protecting pedestrians in the event of a collision.

In this embodiment, the second reinforcing flange portion 73d is formed only at the one edge portion of the extending portion 73 in the vehicle width direction. In other words, a difference is provided in the width direction of the strength of the extension portion 73 . This makes it easier for the extended portion 73 to deform when an impact load is applied, so that impact energy can be reliably absorbed. Then, during normal running, the portion of the extension portion 73 on the side of the second reinforcement flange portion 73d can easily secure the support rigidity necessary for suppressing vibration.

In this embodiment, the one edge portion of the lower extending piece 73 a extends in a direction substantially perpendicular to the upper surface of the reinforcing body portion 61 , and the other edge portion of the lower extending piece 73 a extends toward the upper surface of the reinforcing body portion 61 . It extends in a direction forming an acute angle with respect to As a result, the difference in the strength of the extending portion 73 in the width direction can be significantly provided, and the impact energy can be absorbed more reliably.

In the present embodiment, in the extended portion 73, the length in the longitudinal direction of the third bead portion 75c is shorter than the length in the longitudinal direction of the second bead portion 75b. As a result, the difference in the strength of the extending portion 73 in the width direction can be made more conspicuous, and the impact energy can be absorbed more effectively. Since the number of beads on the lower end side of the extending portion 73 is greater than the number of beads on the upper end side of the extending portion 73, when an impact load is applied, the lower end portion of the extending portion 73 is Deformation is effectively suppressed, and the portion on the upper end side of the extending portion 73 is mainly deformable. As a result, the substantially upper half of the support member 7 is deformed into a substantially Z shape, so that the deformed portion can be more reliably prevented from bottoming out, and a sufficient amount of deformation can be reliably secured.

In the present embodiment, first reinforcing flange portions 72b are formed on both edges of the connecting portion 72 in the vehicle width direction. That is, the extending portion 73 has the second reinforcing flange portion 73d on only one side in the vehicle width direction, but the connecting portion 72 has the first reinforcing flange portion 72b on both sides. As a result, deformation of the connecting portion 72 itself is suppressed and deformation of the extended portion 73 is promoted when an impact load is applied. Therefore, when an impact load is applied, the coupling between the cowl top garnish 5 and the coupling portion 72 is prevented from being released, the cowl top garnish 5 is prevented from falling off, and the extending portion 73 is securely attached. transformed into

Although it is preferable that the reinforcing flange portions (72c, 73d) are formed in the connecting portion 72 and the extension portion 73, these reinforcing flange portions (72c, 73d) may not be formed. Also, each bead (75a, 75b, 75c) may not be formed. The extending portion 73 may be formed to extend from the front end portion of the fixed portion 71 in the vehicle front-rear direction to the rear end portion of the connecting portion 72 in the vehicle front-rear direction.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and further modifications and changes are possible based on the technical idea of the present invention.

3 ... windshield,
4 ... cowl part,
4a ... opening,
5 ... cowl top garnish,
6... Reinforcing member,
61... Reinforcing main body,
7 ... support member,
71... Fixed part,
72 ... connecting part,
72b... first reinforcing flange portion (flange portion),
73 ... extension part,
73a ... lower extension piece,
73b ... upper extension piece,
73c ... connection part,
73d... second reinforcing flange portion (flange portion),
75a... first bead portion,
75b ... second bead portion,
75c... Third bead portion

Claims (5)

A vehicle front structure comprising: a cowl portion having an opening opening upwardly of the vehicle and arranged along a lower portion of a windshield; and a cowl top garnish covering the opening,
a reinforcing member extending in the longitudinal direction of the vehicle in the cowl portion and reinforcing the cowl portion;
a support member having a fixing portion fixed to the reinforcing member, a connecting portion connected to the cowl top garnish, and an extending portion extending from the fixing portion to the connecting portion, and supporting the cowl top garnish from below;
including
The extending portion includes a lower extending piece that extends upwardly of the vehicle continuously from one end of the fixed portion in the vehicle front-rear direction, and a lower extending piece that extends from the other end of the connecting portion in the vehicle front-rear direction to extend the connecting portion. and is bent in the vehicle front-rear direction at a connection portion between the lower extension piece and the upper extension piece,
The vehicle front structure, wherein the width of the upper extension piece in the vehicle width direction is set narrower than the width of the lower extension piece in the vehicle width direction. 2. The vehicle front structure according to claim 1, wherein a flange portion projecting downward of the vehicle is formed at one edge portion of the extending portion in the vehicle width direction. The reinforcing member has a reinforcing main body portion that is arranged in an inclined posture so as to approach the cowl top garnish toward the rear of the vehicle and to which the fixing portion is fixed,
the one edge of the lower extending piece extends in a direction substantially perpendicular to the upper surface of the reinforcing main body;
3. The vehicle front structure according to claim 2, wherein the other edge in the vehicle width direction of the lower extending piece extends in a direction forming an acute angle with respect to the upper surface of the reinforcing main body. . A first bead portion extending from a lower end of the extending portion to a predetermined position on the upper extending piece is formed at a central portion of the extending portion in the vehicle width direction,
A second bead portion extending from the lower end of the extending portion to a predetermined position on the upper extending piece is formed on the portion of the extending portion on the one edge side,
3. A third bead portion extending from a lower end of the extending portion to a predetermined position in front of the connecting portion is formed on the portion of the extending portion on the side of the other edge portion. 3. The vehicle front structure according to 3. The vehicle front structure according to any one of claims 1 to 4, wherein each of the connecting portions has a flange portion projecting downward of the vehicle at both edges thereof in the vehicle width direction.

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