JP2009286246A - Vehicular hood structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular hood structure provided with a hood body which covers an engine room at a front part of a vehicle and has a vertically penetrating opening, and an opening covering member fitted to cover the opening of the hood body, and capable of absorbing an impact even if an impact load from an upper side is applied to a part in front of the opening in the hood body. <P>SOLUTION: In the vehicular hood structure, an opening covering member 60 is coupled with a peripheral edge of an opening 50a in a hood body 50 at a plurality of parts including a front side of the opening 50a by using coupling means 70 etc. and 90 etc. The coupling means 70 etc. on the front side of the opening out of the coupling means are uncoupled when an impact load from the upper side is applied to a part 50A in front of the opening in the hood body 50. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure of a hood that covers an engine room in a front portion of a vehicle, and belongs to the technical field of a vehicle body structure of an automobile.

  The hood body that covers the engine compartment at the front of the vehicle may have a role to absorb the shock by being deformed when an impact load is applied to the front of the vehicle body. It may not be absorbed.

  That is, an engine, a transmission, and other various devices are arranged in the engine room, and a part of the hood main body is bulged upward or an engine interface is provided to secure a space for installing these devices. An air inlet may be provided to supply air to the cooler. However, for design and structural reasons, instead of the structure, an opening is provided so as to include the bulging part and a part where the air introduction port is provided, and an opening cover member corresponding to the application is provided in the opening. May be attached. However, the opening cover member may be more rigid than the hood body, in which case the rigidity of the hood as a whole is increased and the hood body is difficult to deform, that is, it is difficult to absorb impact. .

  As a countermeasure against this problem, for example, Patent Document 1 discloses the following. That is, the opening cover member and the hood main body are fastened with bolts and nuts, and the bolt insertion hole of the hood main body is formed in a daruma shape in which two substantially circular holes are connected to the front and rear. The diameter of the part is such that the shaft part of the bolt can be inserted, the hole on the front side is made larger than the nut, and when an impact load is applied to the hood body from the front, the part ahead of the opening in the hood body By deforming rearwardly, the bolt and the nut are relatively moved to the front hole portion and come out of the hole portion. According to this, the front side of the opening cover member is detached from the hood main body, and the hood main body is easily bent back and forth on the side of the opening.

Japanese Examined Patent Publication No. 63-23028

  However, in the thing of the said patent document 1, when the impact load acts on the said hood main body from the upper part, for example by the light collision to the vehicle body front part, etc., since the hood main body itself does not deform | transform back and forth, In addition, the nut does not come out of the bolt insertion hole, and as a result, the front portion of the opening mounting member does not come off from the hood main body, and the impact may not be sufficiently absorbed. In particular, the front portion of the air intake member in the hood main body is generally locked to the vehicle body main body side by a striker and is more unlikely to be deformed, and the shock is more difficult to absorb.

  Then, this invention makes it a subject to provide the hood structure for vehicles which can absorb an impact, even when an impact load acts on the part ahead of the said opening in the said hood main body from upper direction.

  In order to solve the above-described problems, the present invention is configured as follows.

  First, the invention according to claim 1 of the present application covers a hood main body that covers an engine room in a front portion of a vehicle and has an opening penetrating vertically, and an opening cover that is attached to cover the opening of the hood main body. A vehicle hood structure including a member, wherein the opening cover member is coupled to a peripheral portion of the opening in the hood main body at a plurality of locations including a front side of the opening by using coupling means. Among the coupling means, the coupling means on the front side of the opening is configured such that the coupling is released when an impact load is applied to the portion of the hood body in front of the opening from above.

  According to a second aspect of the present invention, in the vehicular hood structure according to the first aspect, the opening cover member is an air intake member having an outside air inlet.

  According to a third aspect of the present invention, in the vehicle hood structure according to the first or second aspect, a striker for fixing the hood main body to the vehicle body main body is provided at a portion of the hood main body in front of the opening. It is provided.

  According to a fourth aspect of the present invention, in the vehicle hood structure according to the third aspect, the coupling means on the front side of the opening is formed through the hole provided in the hood body from the opening cover member. A projecting member extending downward to the lower surface side of the hood main body and having an engaging portion; and engaged with the engaging portion of the projecting member on the lower surface side of the hood main body; It is comprised with the fastener which has an engagement member from which the said engagement is cancelled | released when an impact load acts.

  According to a fifth aspect of the present invention, in the hood structure for a vehicle according to any one of the first to fourth aspects of the present invention, the coupling means on the rear side of the opening extends from the opening cover member to the hood. A bolt that extends downward to the lower surface side of the hood main body through a hole provided in the main body, and a nut that is screwed to the bolt on the lower surface side of the hood main body.

  According to a sixth aspect of the present invention, in the hood structure for a vehicle according to any one of the first to fifth aspects of the present invention, the front of the front of the vehicle is formed on the side of the opening in the hood main body. A fragile portion is provided that folds and deforms the hood body forward and backward when an impact load is applied.

  The invention according to claim 7 is the vehicle hood structure according to any one of claims 1 to 6, wherein a front portion of the vehicle front portion is provided at a peripheral portion of the opening in the hood body. A notch for bending the hood body back and forth when an impact load is applied is provided.

  According to an eighth aspect of the present invention, in the hood structure for a vehicle according to any one of the first to fifth aspects of the present invention, the front of the front of the vehicle is formed at a side of the opening in the hood main body. A fragile portion that folds and deforms the hood body forward and backward when an impact load from the vehicle is applied to the hood body, and extends outward from the vehicle width direction at both ends of the opening in the vehicle width direction. There is provided a notch that folds and deforms the hood body forward and backward when an impact load from the front is applied to the part, and the notch and the fragile part are formed so as to be at substantially the same position in the vehicle longitudinal direction. It is characterized by being.

  Next, the effect of the present invention will be described.

  First, according to the first aspect of the present invention, a pedestrian comes into contact with the front portion of the hood main body from above by, for example, a light collision with the front portion of the vehicle body, and the hood main body touches the front portion of the opening. When an impact load is applied from above, the coupling by the coupling means on the front side of the opening among the plurality of coupling means for coupling the opening cover member to the hood body is released. Therefore, the front part of the opening in the hood main body can be displaced downward, and the impact can be absorbed well. Therefore, pedestrian protection at the time of a light collision will be realized satisfactorily.

  Further, according to the invention described in claim 2, when the opening cover member is an air intake member having an outside air inlet, the above-described effects are exhibited. In other words, the air intake member that introduces the outside air for the intercooler and the air intake member that introduces the outside air into the engine room must have higher rigidity than the bonnet body so as to withstand the wind pressure of the inflowing outside air. In many cases, the invention according to claim 1 is particularly effective in such a case. In addition, the opening cover member in Claim 1 includes the thing which does not have an external air inlet.

  According to the invention described in claim 3, when the striker for fixing the hood main body to the vehicle body main body is provided in the front portion of the opening in the hood main body, The invention is particularly effective. That is, when the striker is provided as described above, the front portion of the opening in the hood main body is restrained on the vehicle body main body side, and it is difficult to displace further downward. When the coupling by the coupling means on the front side of the opening of the coupling means is released, the portion of the hood main body other than the portion supported by the striker can be deformed downward. Therefore, even when the striker is provided as described above, the impact can be absorbed well.

  According to the invention of claim 4, the coupling means on the front side of the opening extends downward from the opening cover member to the lower surface side of the hood body through a hole provided in the hood body, and A projecting member having an engaging portion; engaged with the engaging portion of the projecting member on the lower surface side of the hood main body; and when the impact load is applied to a portion of the hood main body in front of the opening from above It is comprised with the fastener which has an engaging member from which release is carried out. Therefore, it is possible to easily set an appropriate coupling strength according to the impact load, and to improve the mounting operability. Also, the structure itself is simple.

  According to the invention described in claim 5, the coupling means on the rear side of the opening is a bolt that extends downward from the opening cover member to the lower surface side of the hood body through a hole provided in the hood body. And a nut screwed onto the bolt on the lower surface side of the hood main body. Therefore, a sufficient coupling strength is ensured on the rear side where the coupling release is not required, and the opening mounting member is prevented from completely falling off when an impact load is applied.

  By the way, even when configured as described above, there are the following problems. That is, if the hood body is provided with an opening, the folding position and the folding direction are difficult to determine, and as a result, when the hood body should be folded back and forth on the side of the opening, On the other hand, it is deformed with a slight inclination, or is deformed with an inclination in the opposite direction, so that the state of bending deformation is not stable, and shock absorption cannot be performed stably.

  However, according to the invention described in claim 6, the fragile portion that bends and deforms the hood body forward and backward when the impact load from the front to the vehicle front part acts on the side of the opening in the hood body. Since it is provided, it is guided to this weak part, and the hood body is easily folded back and forth and deformed. That is, the front and rear positions and directions of the hood body are deformed and the impact applied to the hood body from the front of the vehicle is stably absorbed.

  According to the seventh aspect of the present invention, a notch that folds and deforms the hood main body forward and backward when an impact load from the front to the front of the vehicle is applied is provided at a peripheral edge portion of the opening in the hood main body. Therefore, it is guided by this notch, and the hood body is easily folded back and forth and deformed. That is, the front and rear positions and directions of the hood main body are further stabilized, and the impact applied to the hood main body from the front of the vehicle is more stably absorbed.

  According to the eighth aspect of the invention, the same effects as in the sixth and seventh aspects can be obtained, and the following effects can be obtained. That is, since the notches are formed so as to extend outward in the vehicle width direction from both ends of the opening in the vehicle width direction, the direction in which the broken line extends in the vehicle width direction when the notch is bent back and forth. Will match. Therefore, the bending deformation of the hood body is further stabilized. Further, the structure of the notch is simple and can be easily formed.

  Further, since the notch and the fragile portion are formed so as to be substantially at the same position in the longitudinal direction of the vehicle body, the folding position by the notch and the folding position by the fragile portion in the longitudinal direction of the vehicle body coincide with each other. . Therefore, the bending deformation before and after the hood body is further stabilized.

  Hereinafter, a vehicle hood structure according to an embodiment of the present invention will be described.

  FIG. 1 is a perspective view of a vehicle 1 according to an embodiment of the present invention. As can be seen from this figure, the outer surface of the front portion of the vehicle 1 is constituted by members such as a hood hood 2 (hereinafter simply referred to as “hood 2”), a front bumper 3, a front fender 4, and the like, as shown in FIG. As described above, an engine room X in which various devices such as the engine 11 and the transmission 12 are disposed is formed in these inner spaces.

  Further, the front body of the vehicle 1 extends vertically along a dash panel (not shown) that partitions the engine room X and the rear passenger compartment, and both sides of the panel, and the front end of the front door 5 is pivoted. The supporting pillar 21 includes a supporting pillar 21, a front side frame 22 that extends forward from the dash panel, an apron reinforcement 23 that extends forward from the upper end side of the hinge pillar 21, and the like. A frame-shaped shroud panel 25 that supports a radiator or the like is attached to the front end side of the front side frame 22. The shroud panel 25 is made of resin and constitutes a vehicle body.

  The bumper 3 includes a bumper face 31 that is formed of resin and forms the outer surface of the vehicle, and a bumper reinforcement 32 that forms a skeleton of the bumper 3 and supports the bumper face 31. The bumper reinforcement 32 is attached to the front end portion of the front side frame 22 via a bellows-like crush can 24 that can be compressed and deformed in the front-rear direction. The front part of the front side frame 22 is also configured to be compressible and deformable in the front and rear direction.

  Next, the structure of the hood 2 according to the present embodiment will be described in detail.

  As can be seen from FIG. 2, the hood 2 is rotatably supported by the vehicle body via a hinge 40 at the rear end, and the upper side of the shroud panel 25 via a striker 41 provided on the lower surface of the front end. The latch mechanism 42 attached to can be locked.

  Further, as can be seen from FIG. 1, the hood 2 is attached to the hood main body 50 provided with an opening 50 a penetrating vertically at the center in the front side vehicle width direction, and the opening 50 a, and is attached to the intercooler of the engine 11. And an air intake member 60 having an air introduction port 60h for introducing air to be supplied.

  3 is a bottom view of the hood 2, and FIG. 4 is an AA cross section, a BB cross section, a CC cross section, a DD cross section, and an EE cross section of FIG. 3. As can be seen from these drawings, the hood main body 50 of the hood 2 is provided with an outer panel 51 that constitutes the outer surface of the vehicle and a space on the outer side of the outer panel 51 so as to form a surface on the engine room X side. And an inner panel 52 to be joined, and these outer edges are joined to each other.

  The opening 50a of the hood main body 50 is formed with openings 52a and 51a having substantially rectangular shapes that are long in the vehicle width direction at the front side in the vehicle width direction center of the inner panel 52 and the outer panel 51, respectively. It is comprised by joining peripheral parts.

  Notches 50b and 50b are formed by cutting the inner panel 52 and the outer panel 51 into the same shape at the same position on the front side of both ends in the vehicle width direction in the peripheral portion of the opening 50a of the hood main body 50. . The notches 50b and 50b are formed so as to extend outward from the opening 50a in the vehicle width direction, and have a substantially rectangular shape.

  In the inner panel 52, in order to ensure the rigidity of the hood 2 at normal times, a front end convex portion 52b that protrudes downward so as to substantially follow the front edge portion, the rear edge portion, and the left and right side edge portions of the panel 52, A rear end convex portion 52c and side end convex portions 52d and 52d are formed.

  The inner panel 52 is formed with a plurality of openings 52e... 52e for the purpose of reducing the weight of the vehicle body, etc., behind the opening 50a for attaching the air intake member 60. The part along the edge of these openings 52e ... 52e in the inner panel 52 is bent to the outer panel 51 side. As a result, the portions extending in the vehicle width direction and the vehicle body front-rear direction by partitioning the openings 52e... 52e have a substantially inverted hat shape in cross section, and the beam of the hood 2 at the normal time is used as a beam between the convex portions. It plays a role of securing surface rigidity. Hereinafter, a portion extending substantially in the vehicle width direction is referred to as a vehicle width direction connecting portion 52f, and a portion extending substantially in the vehicle body front-rear direction is referred to as a front-rear direction connecting portion 52g.

  Here, the side end protrusions 52d and 52d have a bead shape that is recessed upward along a planned front bend line Lf set in the vehicle width direction so as to pass through the notches 50b and 50b on both ends of the opening 50a. The fragile portions 52h and 52h, each of which is a concave portion, are formed, and when an impact load from the front of the vehicle is input to the hood 2, the front fragile portions 52h and 52h can be folded back and forth and deformed.

  Further, the side end protrusions 52d and 52d are bead-shaped recesses that are recessed upward along a planned rear bending line Lr set in the vehicle width direction so as to pass through the vehicle width direction connecting portion 52f. The first rear fragile portions 52j and 52j are respectively formed, and when an impact load from the front of the vehicle is input to the hood 2, the rear first fragile portions 52j and 52j can be deformed by being folded back and forth in a mountain fold shape. Has been.

  Further, the front-rear direction connecting portions 52g... 52g are rear second fragile portions 52k... 52k formed of bead-shaped recesses that are recessed upward and rearward of the vehicle width direction connecting portion 52f, that is, sandwiching the planned rear bending line Lr. Are formed, and when an impact load from the front of the vehicle is input to the hood 2, the rear second weakened portion 52 k. The line Lr is configured to be able to be bent back and forth.

  Here, the rigidity with respect to bending deformation of these weak parts is weaker in the front weak parts 52h and 52h than in the rear weak parts 52j, 52j, 52k... 52k. This rigidity is set by adjusting the depth of the concave portion of each fragile portion.

  Further, among the peripheral portions of the opening 50a of the hood body 50, the front peripheral portion 50f and the rear peripheral portion 50r are respectively provided with attachment portions 50c... 50c for the air intake member 60 at substantially equal intervals in the vehicle width direction. A place is formed. In this case, the front mounting portion is located in front of the planned fold line Lf.

  Next, the air intake member 60 will be described. The air intake member 60 is formed of a hard resin, and as shown in FIGS. 5 and 6, an upper surface portion 60 a formed to be continuous with the upper surface of the rear portion of the air intake member 60 in the hood main body 50, and the hood A lower surface portion that is formed to be continuous with the upper surface of the front portion 50b of the air intake member 60 in the main body 50, rises smoothly rearward and upward in the left and right directions, and the left and right end portions are coupled to the left and right end portions of the upper surface portion 60a. 60b. And in the rear end part and lower surface part 60b of the upper surface part 60a, it is fixed to the front peripheral part 50f and the rear peripheral part 50r of the opening 50a in the hood main body 50 by fasteners 70 ... 70 and fastening members 90 ... 90. It has become.

  As shown in FIG. 6, on the rear end side of the upper surface portion 60a of the air intake member 60 and on the lower surface of the lower surface portion 60b, there are mounting boss portions 60c ... 60c corresponding to the mounting portions 50c ... 50c of the hood main body 50. Five points are formed at approximately equal intervals in the vehicle width direction.

  Next, the attachment structure of the air intake member 60 to the front peripheral portion 50f of the opening 50a and the attachment structure to the rear peripheral portion 50r will be described in detail. First, the attachment to the front peripheral portion 50f of the opening 50a will be described. Of the five attachment portions 50c ... 50c shown in FIG. 6, the attachment portions 50c ... 50c other than the center in the vehicle width direction are shown in FIG. As shown, it is secured by fasteners 70. More specifically, the fastener 70 is fixed by embedding the head portion 71a in the boss portion 60c of the lower surface portion 60b of the air intake member 60, and the fastener main body 71 having the engaging portion 71c on the shaft portion 71b, And an engaging member 72 having a hole 72a engageable with the engaging portion 71c of the fastener main body 71. Then, the shaft portion 71b of the fastener main body 71 is inserted from above into a fastener insertion hole 50s formed in the attachment portion 50c of the front peripheral portion 50f of the hood main body 50, and the front peripheral portion 50f of the front peripheral portion 50f is inserted into the shaft portion 71b of the fastener main body 71. By engaging the engaging member 72 from below, the lower surface portion 60 b of the air intake member 60 is fixed to the front peripheral edge portion 50 f of the hood main body 50. A washer 73 is interposed between the engaging member 72 and the attachment portion 50c.

  In this case, the strength of the engagement between the fastener main body 71 and the engagement member 72 of the fastener 70 is such that when a predetermined force or more is applied in the direction of separating the fastener main body 71 in the axial direction, It is set by adjusting the strength and elasticity of the engaging portion 71c so as to be released. This predetermined force is applied when, for example, an impact force acts on a front portion 50A of the air intake member 60 of the hood main body 50 due to, for example, a light collision or the like when an adult of a standard body abuts from above. The size is set to be canceled.

  On the other hand, among the five attachment portions 50c... 50c of the front peripheral portion 50f shown in FIG. 6, the attachment portion 50c in the center in the vehicle width direction is positioned with respect to the hood main body 50 by the positioning pins 80 as shown in FIG. Is made. More specifically, the positioning pin 80 is fixed by embedding the head portion 80a in the boss portion 60c of the lower surface portion 60b of the air intake member 60, and the main body portion 80b of the positioning pin 80 is fixed to the front side of the hood main body 50. It is positioned by being inserted from above into a positioning pin insertion hole 50t formed in the attachment portion 50c of the peripheral edge portion 50f.

  Next, the attachment to the rear peripheral edge portion 50r of the opening 50a will be described. Of the five attachment portions 50c... 50c shown in FIG. As shown in FIG. 9, it is fixed by a fastening member 90. The fastening member 90 includes a bolt 91 and a nut 92. More specifically, the bolt 91 is fixed by embedding a head portion 91 a in a boss portion 60 c of the upper surface portion 60 a of the air intake member 60, and the screw portion 91 b of the bolt 91 is fixed to the opening 50 a of the hood main body 50. By inserting the nut 92 from below the rear peripheral edge 50r into the bolt insertion hole 50u formed in the mounting part 50c of the rear peripheral edge 50f, and screwing the nut 92 from below the rear peripheral edge 50r, the air intake The rear end side of the upper surface portion 60 a of the member 60 is fixed to the rear peripheral edge portion 50 r of the hood main body 50. A washer 93 is interposed between the nut 92 and the mounting portion 50c.

  On the other hand, of the five attachment portions 50c of the rear peripheral edge portion 50r, the attachment portions other than the both ends in the vehicle width direction and the center are positioned by the same positioning structure as the positioning pin 80. The description is omitted.

  Next, the structure of the front portion 50A of the air intake member 60 in the hood main body 50 will be described with reference to FIG. As shown in the drawing, the striker train to which the striker 41 is fixed is located in a predetermined range portion (see FIG. 3) sandwiching the center in the vehicle width direction of the space between the front end convex portion 52b of the inner panel 52 and the outer panel 51. A force 53 is provided. The striker reinforcement 53 includes a front member 54 and a rear member 55.

  The front member 54 includes a lower surface portion 54a whose both end sides are fixed to the lower surface portion 52w of the front end convex portion 52b of the inner panel 51, an inclined surface portion 54b that rises from the front end of the lower surface portion 54a to the vicinity of the inner surface of the outer panel 51, An upper surface portion 54c that extends substantially forward from the front end of the inclined surface portion 54b substantially parallel to the outer panel 51 is provided. An elastic material 56 is attached to the upper surface of the upper surface portion 54c, and the upper surface portion 54c supports the vicinity of the front end portion of the outer panel 51 via the elastic material 56.

  The rear member 55 includes a lower surface portion 55a fixed to the lower surface portion 54a of the front member 54, an inclined surface portion 55b that rises rearward and upward from the rear end of the lower surface portion 55a to the vicinity of the inner surface of the outer panel 51, and the inclined surface portion 55b. An upper surface portion 55c that extends substantially rearward from the rear end substantially parallel to the outer panel 51, and a bent portion 55d that is bent downward at the rear end of the upper surface portion 55c and is fixed to a portion immediately behind the front end convex portion 52b of the inner panel 52. And have. An elastic material 56 is attached to the upper surface of the upper surface portion 55c, and the front portion of the air intake member 60 in the outer panel 51 is supported by the upper surface portion 55c via the elastic material 56.

  The striker 41 is fixed to the center in the vehicle width direction of the lower surface portion 54a of the front member 54 using, for example, a bolt or the like, and has a through hole 52x formed in the lower surface portion 52w of the front end convex portion 52b of the inner panel 51. Projecting downward and engaged with a latch mechanism 42 provided on the upper side of the shroud panel 25.

  In that case, when the strike load is applied to the upper surface portions 54c and 55c of the front member 54 and the rear member 55 via the outer panel 51 and the elastic members 56 and 56, the striker reinforcement 53 is virtually As shown by the line, the inclined surface portion 54b of the front member 54 is tilted forward, and the inclined surface portion 55b of the rear member 55 is tilted backward, whereby the impact can be absorbed.

  Next, the effect | action by this Embodiment is demonstrated.

  First, there is a light collision or the like at a front portion of the vehicle 1 that does not cause deformation of the vehicle body with an obstacle such as a pedestrian, and the front portion of the air intake member 60 in the hood main body 50 as shown in FIG. The case where an impact load is applied from above as indicated by the white arrow on 50A will be described. In this case, the front portion of the front portion 50A is restrained by the latch mechanism 42 on the vehicle body main body side via the striker 41. Therefore, it cannot be displaced downward. On the other hand, the engagement between the fastener main body 71 and the engagement member 72 of the fastener 70 is released on the rear side of the front portion 50A. That is, the coupling between the front side of the air intake member 60 and the front peripheral edge 50f of the opening 50a in the hood main body 50 is released, and as a result, the rear side of the front portion 50A of the air intake member 60 in the hood main body 50 is directed downward. Displaceable. Since the cutouts 50b and 50b and the fragile portions 50h... 50h are provided on the side of the opening 50a, the hood main body 50 is bent into a valley shape at the position of the planned fold line Lf, and the opening front portion 5A. The rear side will be displaced downward.

  Further, when an impact load is applied to the opening front portion 50A of the hood body 50 from above, the impact load is also applied to the striker reinforcement 53 inside the opening front portion 50A via the outer panel 51 and the like. Thus, as shown in FIG. 5 described above, the inclined surface portion 54b of the front member 54 is deformed forward and the inclined surface portion 55b of the rear member 55 is deformed backward.

  Next, a description will be given of a case where there is a collision in which a larger impact load than the light collision occurs, such that the body of the vehicle body is deformed at the front portion of the vehicle 1. In this case, the bumper face 31 of the front bumper 3 is first rearward The object further enters the engine room X side. Then, when contacting the bumper reinforcement 32, the front side of the crash can 24 and the front side frame 22 is compressed and deformed, and the shroud panel 25 attached to the front end of the front side frame 22 is retracted accordingly. To do.

  In this case, since the front end position of the hood 2 is positioned forward of the front end of the front side frame 22, an impact load from the front is applied to the hood 2 in the middle of the compression deformation of the vehicle body. . In that case, in the structure of the hood 2 according to the present embodiment, the deformation of the hood 2 proceeds as follows.

  That is, when an object comes into contact with the front end of the hood 2, the front side of the hood 2 locked to the vehicle body body is pushed rearward by the impact load by the striker 41, and as shown in FIG. At the position of the line Lf, the first weakened parts 52j, 52j and the rear first weakened parts 52j, 52j The second second fragile portion 52k... 52k) is bent into a mountain fold shape. Here, the reason why the front end 50A of the opening 50a in the hood main body 50 is bent and deformed so that the front end is downward is because the hood 2 is lowered forward.

  In that case, the engagement between the fastener main body 71 and the engagement member 72 of the fastener 70 is released on the rear side of the front portion 50A in the initial stage of the bending deformation. That is, the coupling between the front side of the air intake member 60 and the front peripheral edge 50f of the opening 50a in the hood main body 50 is released, and the bending deformation at the position of the front folding line Lf is reliably performed.

  As described above, according to the hood structure according to the present embodiment, the pedestrian comes into contact with the portion 50A in front of the opening 50a in the hood main body 50 from above, for example, by a light collision with the front part of the vehicle body, When an impact load is applied to the opening front portion 50A from above, the fastener 70 on the opening front side of the plurality of fasteners 70... 70 and the fastening members 90. .., 70 (joining means) is released. Therefore, the front portion 50A of the opening 50a in the hood main body 50 can be deformed downward, and the shock can be absorbed well. Therefore, pedestrian protection at the time of a light collision will be realized satisfactorily.

  Moreover, when the said opening cover member is the air intake member 60 which has the external air inlet 60a, the above-mentioned effect will be show | played. That is, the air intake member 60 that introduces the outside air for the intercooler and the air intake member that introduces the outside air into the engine room have to be more rigid than the bonnet body 50 so as to withstand the wind pressure of the inflowing outside air. In many cases, the invention described in claim 1 is particularly effective.

  Further, when the striker 41 for fixing the hood main body 50 to the vehicle body main body is provided in the opening front portion 50A of the hood main body 50, the invention according to claim 1 is particularly effective. That is, when the striker 41 is provided as described above, the front portion 50A of the opening 50a in the hood main body 50 is restrained on the vehicle body main body side, and is less likely to be displaced downward. When the coupling by the fasteners 70... 70 (coupling means) on the opening front side of the plurality of fasteners 70... 70 and the fastening members 90... 90 (coupling means) is released, the opening front portion 50 </ b> A in the hood main body 50. Of these, portions other than those supported by the striker 41 can be deformed downward. Therefore, even when the striker 41 is provided as described above, the impact can be absorbed well.

  Further, the coupling means on the front side of the opening extends downward from the opening cover member 60 to the lower surface side of the hood main body 50 through a hole 60s provided in the hood main body 60, and has a fitting portion 71b. When the main body 71 (projecting member) is engaged with the engaging portion 71b of the fastener main body 71 on the lower surface side of the hood main body 50, and an impact load is applied to the opening front portion 50A of the hood main body 50 from above. The fastener 70 has an engaging member 72 to be disengaged. Therefore, it is possible to easily set an appropriate coupling strength according to the impact load, and to improve the mounting operability. Also, the structure itself is simple.

  Further, the coupling means on the rear side of the opening 50a includes a bolt 91 extending downward from the opening cover member 60 to the lower surface side of the hood main body 50 through a hole 60u provided in the hood main body 60, and the hood main body. 50 and the nut 92 screwed onto the bolt 91 on the lower surface side. Therefore, sufficient coupling strength is ensured on the rear side where it is not necessary to release the coupling, and the opening mounting member 60 is prevented from completely falling off when an impact load is applied.

  By the way, as described above, if the hood body is provided with an opening, the folding position and the folding direction are difficult to determine, and as a result, when the hood body should be folded back and forth on the side of the opening, the vehicle width direction There is a problem that the state of bending deformation is not stable, such as being deformed with a slight inclination with respect to the expected folding line, or deforming in the opposite direction, and shock absorption cannot be performed stably. .

  However, in the present embodiment, a fragile portion 50h that folds and deforms the hood main body 50 back and forth when the impact load from the front to the front of the vehicle acts on the side of the opening 50a in the hood main body 50. Since 50h is provided, the hood main body 50 is easily bent and deformed by being guided by the fragile portions 50h and 50h. That is, the front and rear positions and directions of the bending deformation of the hood main body 50 are stabilized, and the impact applied to the hood main body 50 from the front of the vehicle is stably absorbed.

  In addition, notches 50b and 50b are provided at the periphery of the opening 50a in the hood main body 50 so as to bend and deform the hood main body 50 forward and backward when an impact load is applied to the front of the vehicle. Guided by the notches 50b and 50b, the hood main body 50 is easily folded back and forth and deformed. That is, the front and rear positions and directions of the bending deformation of the hood body 50 are further stabilized, and the impact applied to the hood body 50 from the front of the vehicle is more stably absorbed.

  Further, since the notches 50b and 50b are formed so as to extend outward in the vehicle width direction from both ends of the opening 50a in the vehicle width direction, the vehicle when the direction of the notches 50b and 50b is folded back and forth is deformed. This coincides with the extending direction of the broken line Lf in the width direction. Therefore, the bending deformation of the hood main body 50 is further stabilized. Moreover, the structure of the notches 50b and 50b is simple and can be formed easily.

  Further, the notches 50b and 50b and the fragile portions 50h and 50h are formed so as to be substantially at the same position in the longitudinal direction of the vehicle body. Therefore, the broken positions of the notches 50b and 50b in the longitudinal direction of the vehicle body and the fragile portions 50h and 50h, The folding position by 50h matches. Therefore, the bending deformation before and after the hood main body 50 is further stabilized.

  In the present embodiment, the example in which the air intake member 60 is applied as the opening cover member in the claims has been described. However, the present invention is also applicable to the following. That is, as shown in FIG. 12, in a hood 2 'of a vehicle 1' according to another example, a cover member 60 'having no outside air inlet is applied to an opening 50a' of the hood main body 50 '. Has been. In the engine room, an engine, a transmission, and various other devices are arranged. In order to secure a space for installing these devices, it may be necessary to bulge a part of the hood upward. In the example, the bulging portion is constituted by another member in consideration of the design and structure. Even in the case of such a cover member 60 ', the rigidity may be high, and in order to solve the above-described problems associated therewith, the cover member 60' is attached to the hood main body 50 'as described above. The structure is the same as that of the embodiment.

  INDUSTRIAL APPLICABILITY The present invention can stabilize the deformation of the hood body and can be widely used in the automobile industry.

1 is a perspective view of a front portion of a vehicle according to a first embodiment of the present invention. FIG. 3 is a side view of the front portion of the vehicle body (shown in a state where a fender panel and a bumper face are seen through). It is a bottom view of a bonnet. It is a figure which shows the AA cross section of FIG. 3, a BB cross section, CC cross section, DD cross section, and EE cross section. It is FF expanded sectional drawing of FIG. FIG. 4 is a partially broken enlarged view of a portion around an opening for attaching an air intake member in FIG. 3. It is GG expanded sectional drawing of FIG. It is HH expanded sectional drawing of FIG. It is JJ expanded sectional view of FIG. It is explanatory drawing of an effect | action when an impact load is applied to the opening front part of the food | hood main body from upper direction (It is an AA cross-section position of FIG. 3, but it replaces with the positioning pin 80 for convenience of explanation, and is a front side coupling means. As fastener 70). It is explanatory drawing of an effect | action when an impact load is added to the hood main body from the front of the vehicle body (the AA cross-sectional position in FIG. 3; Fastener 70 is displayed). It is a figure equivalent to FIG. 1 about the vehicle to which a different opening cover member was applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Hood 41 Strike 50 Hood main body 50A Opening front part (The front part of opening in a hood main body)
50a opening 50b notch 50h fragile part (fragile part provided on the side of the opening)
50j rear vulnerable part (fragile part provided behind the opening)
50k Rear fragile part 50s Fastener insertion hole (hole where the protruding part of the fastener extends to the lower surface side of the hood body)
50u Bolt insertion hole (Hole where the bolt extends to the bottom side of the hood body)
60 Air intake member (opening cover member)
60h Outside air introduction port 70 Fastener (coupling means on the front side of the opening)
71 Fastener body (protruding member)
71b engaging part 72 engaging member 90 fastening member (joining means on the rear side of the opening)
91 Bolt 92 Nut X Engine room

Claims (8)

A hood body that covers the engine room at the front of the vehicle and has an opening that penetrates up and down;
A vehicular hood structure comprising an opening cover member attached to cover the opening of the hood body,
The opening cover member is coupled to the peripheral portion of the opening in the hood body using coupling means at a plurality of locations including the front side of the opening,
Of these coupling means, the coupling means on the front side of the opening is configured such that the coupling is released when an impact load is applied to the front portion of the hood body from above. Vehicle hood structure. In the vehicle hood structure according to claim 1,
The vehicle hood structure, wherein the opening cover member is an air intake member having an outside air inlet. In the vehicle hood structure according to claim 1 or 2,
A hood structure for a vehicle, wherein a striker for fixing the hood main body to a vehicle body main body is provided at a portion of the hood main body in front of the opening. In the vehicle hood structure according to claim 3,
The coupling means on the front side of the opening includes a projecting member that extends downward from the opening cover member to a lower surface side of the hood main body through a hole provided in the hood main body, and has an engaging portion. A fastener having an engaging member that is engaged with an engaging portion of the projecting member on the lower surface side and that is disengaged when an impact load is applied to the front portion of the hood body from above. The hood structure for vehicles characterized by being made. In the vehicle hood structure according to any one of claims 1 to 4,
The coupling means on the rear side of the opening includes a bolt extending downward from the opening cover member to a lower surface side of the hood main body through a hole provided in the hood main body, and a screw on the bolt on the lower surface side of the hood main body. A hood structure for a vehicle characterized by comprising a nut to be joined. In the hood structure for vehicles according to any one of claims 1 to 5,
A vehicular hood structure characterized in that a fragile portion is provided at a side of the opening in the hood main body to fold and deform the hood main body forward and backward when an impact load is applied to the front portion of the vehicle. In the vehicle hood structure according to any one of claims 1 to 6,
A hood structure for a vehicle, wherein a notch that folds and deforms the hood main body forward and backward when an impact load from the front to the front of the vehicle is applied is provided at a peripheral edge portion of the opening in the hood main body. In the hood structure for vehicles according to any one of claims 1 to 5,
On the side of the opening in the hood body, a fragile portion is provided that folds the hood body back and forth when the impact load from the front to the vehicle front acts.
The hood body is provided with notches extending outwardly in the vehicle width direction from both ends of the opening in the vehicle width direction and bending the hood body forward and backward when an impact load is applied from the front to the front of the vehicle. And
The vehicle hood structure, wherein the notch and the fragile portion are formed so as to be substantially in the same position in the longitudinal direction of the vehicle body.

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