JP5251262B2 - Vehicle hood structure - Google Patents

Description

  The present invention relates to a hood structure that covers an engine room at the front 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 move relative 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

  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. Note that this problem occurs even when the opening cover member is not rigid enough to remove the opening cover member.

  Then, this invention makes it a subject to provide the hood structure for vehicles which can stabilize the bending deformation of a hood main body.

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

First, an invention according to claim 1 of the present application covers a hood main body that covers an engine room at a front portion of a vehicle and has an opening that penetrates up and down, and an opening cover that is attached to cover the opening of the hood main body. and a member, and the front portion of the forward portion of the opening in the hood main body is a vehicle hood structure which is bound to the vehicle body side of the latching mechanism, the periphery of the opening in the hood body, the The inner panel and the outer panel constituting the hood main body are notched into corresponding shapes at corresponding positions, and are formed so as to extend outward in the vehicle width direction from the both ends of the opening in the vehicle width direction. There is a notch that allows the hood body to be folded back and forth when the impact load from the top is applied, and to be folded back and forth when the impact load from the top is applied. The opening cover member is coupled to the peripheral edge of the opening in the hood main body using coupling means at a plurality of locations including the front side of the opening. The coupling means is configured so that the coupling is released when an impact load is applied to a front portion of the opening in the hood body .

  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 , an impact load from the front to the front of the vehicle is applied to a side of the opening in the hood body. A fragile portion that folds and deforms the hood main body forward and backward during operation is provided, and the fragile portion and the notch are formed so as to be at substantially the same position in the longitudinal direction of the vehicle body.

According to a fourth aspect of the present invention, in the vehicle hood structure according to any one of the first to third aspects, an action of an impact load from the front to the front portion of the vehicle is applied to the hood main body. The hood main body is sometimes provided with a rear fragile portion that folds back and forth behind the opening.

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

First, according to the first aspect of the present invention, when an impact load is applied to the front portion of the vehicle from the front, the hood main body is guided by the notch formed in the peripheral portion of the opening, and is bent back and forth. It becomes easy. Therefore, even when the opening to which the opening cover member is attached is provided in the hood main body, the front and rear positions and directions of the hood main body are stably deformed, and the impact applied to the hood main body from the front of the vehicle is stably absorbed. It becomes.
That is, when an impact load is applied to the hood main body from the front, the hood main body is guided by notches formed so as to extend outward in the vehicle width direction from both ends of the opening in the vehicle width direction, and is bent back and forth. It will be. In this case, the notch formation direction coincides with the extending direction of the fold line in the vehicle width direction when the fold body is bent back and forth, so that the hood body is more stably bent and deformed.
In particular, according to the present invention, the opening cover member is coupled to the peripheral portion of the opening in the hood main body using coupling means at a plurality of locations including the front side of the opening. 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 a portion of the hood body in front of the opening. Therefore, for example, when an impact load acts on the front part of the opening from the front due to a front collision or the like, and the hood body is guided to the notch and bends back and forth, the deformation becomes easy. That is, the front and rear bending deformation of the hood body is further stabilized.
Further, when a pedestrian comes into contact with the front portion of the hood body from above due to, for example, a light collision with the front of the vehicle body, and an impact load acts on the front portion of the hood body from above, the front of the opening The coupling by the side coupling means is released. Accordingly, the front portion of the opening in the hood main body can be displaced downward, so that the impact can be absorbed well, and pedestrian protection at the time of a light collision can be realized well.

  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 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 impact load from the front to the front portion of the vehicle is applied, the hood main body is also moved back and forth by the fragile portion provided on the side of the opening in the hood main body. It will be bent and deformed. In this case, since the fragile portion and the notch are formed so as to be substantially in 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. It will be. Therefore, the bending deformation before and after the hood body is further stabilized.

According to the invention described in claim 4 , when the impact load from the front of the vehicle is applied to the front of the vehicle body, the hood main body is provided behind the opening in addition to the bending deformation at the notch position. Even the rear weak part can be folded back and forth and deformed. That is, the hood main body can be bent and deformed at two places in the front and rear, and the amount of shock absorption can be increased. In that case, since the notch existing in front of the rear weak portion stabilizes the bending deformation of the front portion of the hood body relative to the rear weak portion, the bending deformation due to the rear weak portion is also stable.

  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 from above 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 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 constrained by the latch mechanism 42 on the vehicle 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 downwards. 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 in 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 main 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 or 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 hood main body 50 moves from the both ends in the vehicle width direction of the opening 50a when the impact load is applied to the front portion of the vehicle from the front. It is guided to the notches 50b and 50b formed so as to extend outward in the direction, and is easily bent back and forth and deformed. Therefore, even when the hood main body 50 is provided with the opening 50a to which the air intake member 60 (opening cover member) is attached, the front and rear positions and directions of the hood main body 50 are stably deformed, and the hood main body 50 can be moved from the front of the vehicle. The applied impact is stably absorbed.

  In this case, the formation direction of the cutouts 50b and 50b coincides with the extending direction of the planned folding line Lf (folded line) in the vehicle width direction when it is folded back and forth, so that the hood body 50 is further bent and deformed. It will be stable. Moreover, the structure of the notches 50b and 50b is simple and can be formed easily.

  Further, when an impact load from the front is applied to the front portion of the vehicle, the hood main body 50 is also bent back and forth by the weak portions 50h and 50h provided on the side of the opening 50a in the hood main body 50. Become. In this case, the fragile portions 50h, 50h and the cutouts 50b, 50b are formed so as to be substantially at the same position in the vehicle body front-rear direction. The folding positions of the weak parts 50h and 50h coincide with each other. Therefore, the bending deformation before and after the hood body 50 is further stabilized.

  The air intake member 60 includes fasteners 70... 70 (coupling means) and fastening members 90... 90 (coupling means) at a plurality of locations including the front side of the opening 50 a at the peripheral portion of the opening 50 a in the hood body 50. The fasteners 70... 70 on the opening front side of these connecting means are released when an impact load is applied to the opening front portion 50 </ b> A of the hood body 50. It is configured as follows. Therefore, for example, when an impact load acts on the portion 50A in front of the opening due to a front collision or the like, and the hood body 50 is guided to the notches 50b and 50b and bends back and forth, the deformation is easy. Become. That is, the bending deformation before and after the hood main body 50 is further stabilized.

  Further, for example, a pedestrian comes into contact with the opening front portion 50A of the hood main body 50 from above due to a light collision with a pedestrian on the front of the vehicle body, and an impact load is applied to the opening front portion 50A of the hood main body 50 from above. When acted, the connection by the fasteners 70... 70 on the front side of the opening is released. Therefore, the opening front portion 50A of the hood main body 50 can be displaced downward to absorb the impact well, and pedestrian protection at the time of a light collision is also realized.

  Further, when an impact load from the front of the vehicle is applied to the front of the vehicle body, the hood main body 50 is not only bent at the notch position but also rear vulnerable portions 50j, 50j, 50k provided behind the opening 50a. ... It can be folded back and forth even at 50k. That is, the hood main body 50 can be bent and deformed at two locations in the front and rear directions, and the amount of shock absorption can be increased. In that case, the notch 50b, 50b existing in front of the rear fragile portions 50j, 50j, 50k,... 50k stabilizes the bending deformation of the front portion of the hood body 50 relative to the rear fragile portions 50j, 50j, 50k,. Further, the bending deformation caused by the rear weak parts 50j, 50j, 50k,... 50k is also 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, and the same operation and effect as the above-described embodiment can be obtained.

  INDUSTRIAL APPLICABILITY The present invention can stabilize the bending 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 from the upper part to the opening front part of a hood main body (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 (A 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 (fragile part provided behind the opening)
50s Fastener insertion hole 50u Bolt insertion hole 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 71b Engagement portion 72 Engagement member 90 Fastening member 91 Bolt 92 Nut X Engine room

Claims (4)

A hood body that covers the engine room at the front of the vehicle and has an opening that penetrates up and down;
An opening cover member attached to cover the opening of the hood body , and
A hood structure for a vehicle in which a front portion of a front portion of the opening in the hood body is restrained by a latch mechanism on a vehicle body side ,
The inner panel and the outer panel constituting the hood main body are notched in the corresponding shapes at corresponding positions at the peripheral edge of the opening in the hood main body, respectively, so that the vehicle width direction outward from the both ends in the vehicle width direction of the opening. A notch is formed to extend so that the hood body is folded back and forth in the case of an impact load from the front to the front part of the vehicle, and is bent back and forth in the shape of a valley when the impact load from above is applied. Provided , and
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 so that the coupling is released when an impact load is applied to a front portion of the opening in the hood body. 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,
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 structure for a vehicle , wherein the fragile portion and the notch are formed so as to be substantially at the same position in the longitudinal direction of the vehicle body . In the vehicle hood structure according to any one of claims 1 to 3 ,
A hood structure for a vehicle, wherein the hood main body is provided with a rear fragile portion that folds and deforms the hood main body back and forth behind the opening when an impact load is applied to the front portion of the vehicle from the front .

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