JP4200907B2 - Vehicle hood structure - Google Patents

Description

  The present invention relates to a hood structure for a vehicle, and more particularly to a hood structure for a vehicle that protects a collision body at the time of a collision in a vehicle such as an automobile.

2. Description of the Related Art Conventionally, in a vehicle hood structure that protects a collision object in a vehicle such as an automobile, a configuration in which a striker mounting portion at the front portion of the hood is reinforced with a reinforcing plate is known (see, for example, Patent Document 1). Moreover, the structure which has arrange | positioned the impact-absorbing body between the hood outer panel and the strut tower is known (for example, refer patent document 2). Moreover, the structure which forms the slit of a perpendicular direction in the vertical wall of the rear side of a food inner panel, and absorbs impact energy is known (for example, refer patent document 3). In addition, a configuration in which the hood inner panel has a plurality of cross-sectional hat-shaped ribs that deform by absorbing an impact on the hood outer panel is known (see, for example, Patent Document 4). Moreover, the structure which has arrange | positioned many beads to the food inner panel is known (for example, refer patent document 5).
JP-A-11-321713 JP-A-7-285466 JP-A-9-249157 JP-A-7-285465 JP 2001-151159 A

  However, when the collision body contacts the front end of the hood, if there is nothing between the hood inner panel and the hood outer panel, the hood outer panel is locally deformed and the primary peak value is low. For this reason, energy cannot be absorbed only by the hood, and it collides with the internal organs, resulting in a worse injury value. Further, in the technology of Patent Document 1, the primary peak value can be increased by supporting the hood outer panel from the back surface, but since the deformation stroke is small and the deformation stroke is small, when the distance from the internal organs is short, The injury value gets worse.

  In view of the above facts, an object of the present invention is to provide a vehicle hood structure that can reduce crushing residue while ensuring a high primary peak value and can improve the impact absorption efficiency of the front end portion of the hood at the time of collision.

The present invention according to claim 1 is a vehicle hood structure having a reinforcing member between a hood outer panel and a hood inner panel at a front end portion of the hood,
A vertical wall formed in the reinforcing member and extending in the vertical direction;
An extending portion of the reinforcing member extending from the upper end portion of the vertical wall portion to the rear of the vehicle body along the hood outer panel;
Have a, the and the the vehicle body lower side of the extended portion hood front of the inner panel is disposed, to form a line along the vehicle width direction in the vertically intermediate portion of the vertical wall portion of the reinforcement member It is characterized by that.

Therefore, when the collision body comes into contact with the front end portion of the hood from above the vehicle body, the hood starts from the upper end portion of the vertical wall portion formed in the reinforcing member between the hood outer panel and the hood inner panel at the front end portion of the hood. The hood outer panel can be reinforced by the extending portion of the reinforcing member that extends to the rear of the vehicle body along the outer panel. Further, local deformation of the collision body contact portion in the hood outer panel can be suppressed. Furthermore, since the front part of the hood inner panel is disposed on the vehicle body lower side of the extension part, the extension part comes into contact with the front part of the hood inner panel, so that the front part of the hood inner panel Load can be transmitted quickly. As a result, the remaining crushing can be reduced while securing a high primary peak value, and the impact absorption efficiency of the front end of the hood at the time of collision can be improved. Further, the vertical wall portion formed in the reinforcing member and extending in the vertical direction is easily deformed starting from a broken line formed in the vertical direction intermediate portion along the vehicle width direction. As a result, collision energy can be absorbed by the deformation of the vertical wall, and the stroke amount also increases.

According to a second aspect of the present invention, in the vehicle hood structure according to the first aspect, the extending portion of the reinforcing member and the hood outer panel are fixed with an adhesive.

Therefore, in addition to the content of the first aspect, the extending portion of the reinforcing member becomes a free end by breaking the adhesive that fixes the extending portion of the reinforcing member and the hood outer panel at the time of collision. As a result, the deformation stroke of the reinforcing member can be increased.

According to a third aspect of the present invention, in the hood structure for a vehicle according to the first aspect, a bead extending along a vehicle width direction is formed in the extending portion of the reinforcing member.

Therefore, in addition to the content of the first aspect, the surface rigidity of the extending portion is improved by the bead extending along the vehicle width direction formed in the extending portion of the reinforcing member. As a result, the primary peak value of the impact received by the collision object can be further increased.

According to a fourth aspect of the present invention, in the hood structure for a vehicle according to the first aspect, an adhesive application portion is cut and raised toward the upper side of the vehicle body at a middle portion in the front-rear direction of the striker mounting portion provided on the reinforcing member. It is formed by.

Therefore, in addition to the contents of claim 1, the adhesive application part is formed by cutting and raising the middle part in the front-rear direction of the striker attachment part provided on the reinforcing member , so that when a load is applied. The adhesive application part is easily deformed. As a result, the deformation stroke of the adhesive application portion can be increased.

According to a fifth aspect of the present invention, in the hood structure for a vehicle according to the first aspect, the fold line of the reinforcing member is a straight line along the vehicle width direction .

Therefore, in addition to the content of claim 1, since the broken line of the reinforcing member is a straight line along the vehicle width direction, the vertical wall portion of the reinforcing member starts from the broken line compared to the configuration in which the broken line is a curve. It becomes easy to deform easily.

The present invention according to claim 1 is a vehicle hood structure having a reinforcing member between a hood outer panel and a hood inner panel at a front end portion of the hood , wherein the vertical wall portion is formed on the reinforcing member and extends in the vertical direction. If, possess the extended portion of the reinforcing member and extending to the rear of the vehicle body along the upper end of the vertical wall portion to the hood outer panel, the front of the hood inner panel is disposed on the vehicle body lower side of the extending portion In addition, since a fold line is formed along the vehicle width direction in the vertical middle of the vertical wall of the reinforcing member, the remaining crushing can be reduced while ensuring a high primary peak value, and the impact of the front end of the hood during a collision It has an excellent effect that the absorption efficiency can be improved. Further, since the vertical wall portion of the reinforcing member is deformed by the broken line, the collision energy can be absorbed and the stroke amount can be increased.

According to a second aspect of the present invention, in the vehicle hood structure according to the first aspect, since the extending portion of the reinforcing member and the hood outer panel are fixed with an adhesive, the reinforcing member in addition to the effect of the first aspect It has an excellent effect that the deformation stroke can be increased.

According to the third aspect of the present invention, in the vehicle hood structure according to the first aspect, since the bead extending along the vehicle width direction is formed in the extending portion of the reinforcing member, in addition to the effect of the first aspect, It has an excellent effect that the primary peak value of the impact received by the collision body can be further increased.

According to a fourth aspect of the present invention, in the hood structure for a vehicle according to the first aspect, an adhesive application portion is cut and raised toward the upper side of the vehicle body at an intermediate portion in the front-rear direction of the striker mounting portion provided on the reinforcing member. Since it formed, in addition to the effect of Claim 1, it has the outstanding effect that the deformation | transformation stroke of an adhesive application part can be enlarged.

According to the fifth aspect of the present invention, in the hood structure for a vehicle according to the first aspect, since the broken line of the reinforcing member is a straight line along the vehicle width direction, in addition to the effect of the first aspect, the broken line is a curved line. it has an excellent effect that the easily deformed as compared with configurations.

  An embodiment of a vehicle hood structure according to the present invention will be described with reference to FIGS.

  In the figure, the arrow UP indicates the upward direction of the vehicle body, and the arrow FR indicates the forward direction of the vehicle body.

  As shown in FIG. 3, in the present embodiment, a well-known hood lock mechanism 14 is disposed at the vehicle width direction center portion 12 </ b> A of the front end portion of the hood 12 of the automobile body 10.

  As shown in FIG. 1, the hood 12 includes a hood outer panel 16 that constitutes a vehicle body outer surface of the hood 12, and a hood inner panel 18 disposed on the inner side (back side) of the hood outer panel 16. The 16 front end edges 16A and the front end edge 18A of the hood inner panel 18 are coupled by hemming.

  A hole 20 is formed in the hood inner panel 18 at a predetermined distance from the front edge 18A toward the rear of the vehicle body. A striker 22 constituting a part of the hood lock mechanism 14 is formed in the hole 20 above the vehicle body. It is inserted from the side.

  The front attachment portion 22A and the rear attachment portion 22B of the striker 22 are fixed to the front attachment portion 32A and the rear attachment portion 32B of the attachment portion 32 of the hood lock reinforcement 30 as a reinforcing member.

  As shown in FIG. 2, the hood lock reinforcement 30 extends along the vehicle width direction, and the side cross-sectional shape of the mounting portion 32 of the hood lock reinforcement 30 viewed from the vehicle width direction has the opening downward. It is an approximately U-shape.

  As shown in FIG. 1, a vertical wall portion 30A is formed at the front end portion of the attachment portion 32 of the hood lock reinforcement 30 in an obliquely upward front direction of the vehicle body, and a hood is formed at the upper end portion of the vertical wall portion 30A. A flange 30 </ b> B extending forward of the vehicle body along the lower surface of the outer panel 16 is formed. The flange 30B is connected to the hood outer panel 16 by a mastic 40 as an adhesive, and the mastic 40 is filled in a mastict filling portion 41 formed in the hood lock reinforcement 30 shown in FIG.

  A vertical wall portion 30C is formed at the rear end portion of the attachment portion 32 of the hood lock reinforcement 30 obliquely upward and rearward of the vehicle body, and a vertical middle portion of the vertical wall portion 30C extends along the vehicle width direction. A broken line 34 is formed. Further, an extending portion 36 extending rearward of the vehicle body along the lower surface of the hood outer panel 16 is formed at the upper end portion of the vertical wall portion 30C, and a predetermined gap 38 is opened below the extending portion 36. A front portion 18B of the hood inner panel 18 is disposed.

  As shown in FIG. 2, the rear end portion 36 </ b> A of the extending portion 36 of the hood lock reinforcement 30 extends to the bone connecting portion 18 </ b> C of the hood inner panel 18.

  As shown in FIG. 1, the extended portion 36 of the hood lock reinforcement 30 is fixed to the lower surface of the hood outer panel 16 by a mastic 40 as an adhesive.

  In addition, a plurality of beads 42 extending in the vehicle width direction are formed in the extended portion 36 of the hood lock reinforcement 30 at predetermined intervals in the vehicle body front-rear direction, and adjacent beads in the extended portion 36 are formed. The intermediate part 36B of 42 and the part 36C between the bead 42 and the vertical wall part 30C are fixed to the lower surface of the hood outer panel 16 by mastics 40 as adhesives.

  Further, an adhesive application portion 44 is formed in the front-rear direction intermediate portion of the attachment portion 32 of the hood lock reinforcement 30 toward the upper side of the vehicle body.

  As shown in FIG. 2, a pair of left and right adhesive application portions 44 of the hood lock reinforcement 30 are formed by cutting and raising. Further, a bead 46 is formed at the center in the width direction of the adhesive application portion 44, and the mastic 40 as an adhesive is applied to the upper end portion 46 </ b> A of the bead 46.

  As shown in FIG. 1, the upper end portion 44 </ b> A of the adhesive application portion 44 of the hood lock reinforcement 30 is fixed to the lower surface of the hood outer panel 16 by a mastic 40.

  As shown in FIG. 2, a fold line 34 formed in the middle portion in the vertical direction of the vertical wall portion 30C of the hood lock reinforcement 30 is a straight line extending in the vehicle width direction, and a fold line 50 serving as a lower end of the vertical wall portion 30C. Is also a straight line extending in the vehicle width direction.

  Although not shown, a hood lock constituting a part of the hood lock mechanism 14 is disposed on the lower side of the striker 22 in the vehicle body, and the striker 22 and the hood lock latch are engaged with each other. The hood 12 is held in the closed position. Although not shown, the hood lock is disposed on the top of the hood lock brace.

  Next, the operation of this embodiment will be described.

  In the present embodiment, as shown in FIG. 4, when the collision body K comes into contact with the front end portion of the hood 12 in the vicinity of the center portion 12 </ b> A in the vehicle width direction from the upper front side of the vehicle body (in the direction of arrow A in FIG. 4). Since the hood outer panel 16 is reinforced from the lower side by the extending portion 36 of the hood lock reinforcement 30 extending rearward along the hood outer panel 16, the collision body K is formed as shown by a solid line in FIG. 7. The primary peak value P1 of the received acceleration G (deceleration because it actually decelerates, that is, a negative acceleration, which is indicated by an absolute value in FIG. 7) can be increased, and the impact of the collision object on the hood outer panel 16 can be increased. Local deformation of the contact portion can also be suppressed.

  Further, as shown in FIGS. 5 and 6, since the line length of the side section of the extending portion 36 is long due to the bead 42, internal organs such as a battery and an engine in which the hood inner panel 18 is disposed below the hood 12. When the secondary collision occurs, the extension portion 36 is largely deformed without bottoming out. For this reason, the stroke of the collision body K can be lengthened.

  Further, since the front portion 18B of the hood inner panel 18 is disposed in a wrapping manner on the vehicle body lower side of the extension portion 36, the extension portion 36 comes into contact with the front portion 18B of the hood inner panel 18 so that the hood The load at the time of collision can be quickly transmitted to the front portion 18B of the inner panel 18.

  As a result, the relationship between the acceleration G and the stroke (displacement) S when the collision body K abuts on the hood 12 of the present embodiment is as shown by a solid line in FIG. The primary peak value P1 can be increased as compared with the primary peak value P2 in the configuration in which the extending portion 36 is not formed in the hood lock reinforcement 30 shown by a broken line in FIG. For this reason, in this embodiment, the remaining crushing can be reduced while securing a high primary peak value, and the impact absorption efficiency of the front end of the hood at the time of collision can be improved.

  Further, in the present embodiment, a plurality of beads 42 extending along the vehicle width direction are formed in the extending portion 36 of the hood lock reinforcement 30 at a predetermined interval in the vehicle body front-rear direction. The rigidity of the extension part 36 of the hood lock reinforcement 30 reinforced from the back side is improved. As a result, the primary peak value P1 of the impact received by the collision body K can be improved also in this point.

  Further, in the present embodiment, a plurality of beads 42 extending along the vehicle width direction are formed in the extending portion 36 of the hood lock reinforcement 30 at a predetermined interval in the vehicle body front-rear direction. As a result, the length of the extended portion 36 is increased. As a result, the amount of deformation of the extending portion 36 until the secondary collision with the internal organs increases.

  Furthermore, in this embodiment, the extending part 36 of the hood lock reinforcement 30 is fixed to the lower surface of the hood outer panel 16 by a mastic 40 as an adhesive. As a result, the mastic 40 that fixes the extended portion 36 of the hood lock reinforcement 30 and the hood outer panel 16 at the time of collision breaks, so that the extended portion 36 of the hood lock reinforcement 30 becomes a free end, The deformation amount of the extending portion 36 until the secondary collision is increased.

  As a result, as shown by the solid line in FIG. 7, in this embodiment, the stroke value S1 of the collision body K has no extension part 36 shown by the broken line in FIG. 7, and the extension part 36 of the hood lock reinforcement 30 The fixing with the hood outer panel 16 can be made larger than the stroke value S2 of the collision body K of the comparative example in a configuration in which the hood outer panel 16 is not broken. In the present embodiment, the secondary peak value P3 is compared with the secondary peak value P4 of the comparative example. Can be lowered.

  Moreover, in this embodiment, since the adhesive application part 44 of the hood lock reinforcement 30 is formed by cutting and raising, when the collision body K contacts the upper periphery of the adhesive application part 44 in the hood 12. The adhesive application part 44 is easily deformed. As a result, the deformation stroke of the adhesive application part 44 can be increased.

  Further, since the upper end portion 44A of the adhesive application portion 44 of the hood lock reinforcement 30 is fixed to the lower surface of the hood outer panel 16 by the mastic 40, the dent resistance performance of the hood outer panel 16 can be improved.

  Moreover, in this embodiment, since the broken line 34 was formed in the vertical wall part 30C of the hood lock reinforcement 30 along the vehicle width direction, the vertical wall part 30C of the hood lock reinforcement 30 is compared with the configuration without the broken line 34. It becomes easy to deform. As a result, the collision energy can be absorbed by the deformation of the vertical wall portion 30C of the hood lock reinforcement 30, and the stroke amount is also increased.

  In this embodiment, the fold line 34 of the vertical wall portion 30C of the hood lock reinforcement 30 is a straight line extending in the vehicle width direction, and the fold line 50 serving as the lower end of the vertical wall portion 30C of the hood lock reinforcement 30 is also a vehicle. It is a straight line extending in the width direction. As a result, the hood lock reinforcement 30 is more easily deformed than the configuration in which the broken line is a curve. As a result, the collision energy can be absorbed by the deformation of the hood lock reinforcement 30, and the stroke amount is also increased.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, in the said embodiment, although the adhesive application part 44 of the hood lock reinforcement 30 was cut and formed, it replaces with this and the structure other than cutting and raising the adhesive application part 44 of the hood lock reinforcement 30 It is also good.

  Moreover, in the said embodiment, although the broken line 34 was formed in the vertical wall part 30C of the hood lock reinforcement 30, it is good also as a structure which does not form the broken line 34 in the vertical wall part 30C of the hood lock reinforcement 30 instead. .

  In the above embodiment, the fold lines 34 and 50 of the hood lock reinforcement 30 are straight lines extending in the vehicle width direction. Instead, the fold lines 34 and 50 of the hood lock reinforcement 30 are straight lines extending in the vehicle width direction. It is good also as a structure which is not.

  Further, as shown in FIG. 8, welded portions 56 that are recessed toward the vehicle body lower side are formed at both ends in the vehicle width direction at the rear end portion 36 </ b> A of the extending portion 36 of the hood lock reinforcement 30. The load at the time of collision may be more quickly transmitted to the front portion 18B of the hood inner panel 18 by fixing it to the bone connecting portion 18C of the hood inner panel 18 by spot welding or the like.

  Further, instead of the bead 42 extending along the vehicle width direction, a bead 58 extending along the longitudinal direction of the vehicle body is provided in the extending portion 36 of the hood lock reinforcement 30 in the vehicle width direction as shown in FIG. A configuration may be adopted in which a plurality of lines are formed at intervals. The bead 42 extending along the vehicle width direction may be bent in an arc shape in the longitudinal direction of the vehicle body.

  Further, as shown in FIG. 10, a shelf 60 is formed on the extended wall 36 </ b> A of the bead 42 formed along the vehicle width direction in the extended portion 36 of the hood lock reinforcement 30, and the hood lock reinforcement 30. It is good also as a structure which improves the rigidity of the extension part 36 further, and further improves the primary peak value of the impact which the collision body K receives.

  In addition, as shown in FIG. 11, a plurality of holes 62 are formed in the vertical wall portion 30C of the attachment portion 32 of the hood lock reinforcement 30 across the broken line 34 at predetermined intervals in the vehicle width direction. The vertical wall portion 30C of the reinforcement 30 may be more easily deformed, and the stroke amount may be increased.

  Further, as shown in FIGS. 12 and 13, the hood lock reinforcement 64 and the reinforcing member 66 are separate members (separate bodies) having different plate thicknesses, for example, and along the lower surface of the hood outer panel 16 at the rear part of the reinforcing member 66. Alternatively, the extended portion 36 extending rearward of the vehicle body may be formed, and the front portion 18B of the hood inner panel 18 may be disposed below the extended portion 36 with a predetermined gap 38 therebetween.

  In the configuration shown in FIGS. 12 and 13, a convex portion 66 </ b> A is formed in the vicinity of the front end portion of the reinforcing member 66 toward the vehicle body lower side, and the lower end portion 68 </ b> A of the convex portion 68 is the front end of the hood lock reinforcement 64. It is joined to the portion 64A. In addition, the rear end portion 36A of the extending portion 36 of the reinforcing member 66 is formed with a joint portion 69 that protrudes rearward of the vehicle body at a predetermined interval in the vehicle width direction. The joint portion 69 is a hood inner portion. The panel 18 is spot welded to the bone joint 18C.

  Instead of the joint portion 69, as shown in FIG. 14, foot portions 70 projecting outward in the vehicle width direction are formed in the vicinity of the rear end portion 36 </ b> A of the reinforcing member 66, and these foot portions 70 are connected to the hood inner portion. The panel 18 may be spot welded. Further, the foot portion 70 may protrude rearward from the rear end portion 36A of the reinforcing member 66.

  Further, in the above embodiment, the hood lock reinforcement 30 or the reinforcing member 66 is connected to the front end portion of the hood 12 corresponding to the hood lock mechanism 14 disposed in the vehicle width direction central portion 12A of the front end portion of the hood 12. Although arranged in the center portion 12A in the width direction, instead of this, the hood lock mechanism 14 is arranged at both ends in the vehicle width direction of the front end portion of the hood 12, and the hood lock reinforcement 30 or the reinforcing member 66 is attached to the hood. It is good also as a structure arrange | positioned at the vehicle width direction both ends etc. of the front-end part in the food | hood 12 which has arrange | positioned the locking mechanism 14. FIG.

FIG. 4 is an enlarged cross-sectional view taken along line 1-1 of FIG. It is the perspective view seen from the vehicle body diagonal front which shows the hood lock reinforcement of the hood structure for vehicles which concerns on one Embodiment of this invention. It is the perspective view seen from the vehicle body diagonally front which shows the vehicle body to which the vehicle hood structure which concerns on one Embodiment of this invention was applied. It is operation | movement explanatory drawing of the hood structure for vehicles which concerns on one Embodiment of this invention. It is operation | movement explanatory drawing of the hood structure for vehicles which concerns on one Embodiment of this invention. It is operation | movement explanatory drawing of the hood structure for vehicles which concerns on one Embodiment of this invention. It is a graph which shows the relationship between the acceleration at the time of a collision body contact | abutting to the vehicle hood, and a displacement. It is the perspective view seen from the vehicle body diagonally front which shows the principal part of the hood structure for vehicles concerning other embodiments of the present invention. It is the perspective view seen from the vehicle body diagonally front which shows the principal part of the hood structure for vehicles concerning other embodiments of the present invention. It is sectional drawing corresponding to FIG. 1 which shows the hood structure for vehicles which concerns on other embodiment of this invention. It is the perspective view seen from the vehicle body diagonal front which shows the hood lock reinforcement of the hood structure for vehicles which concerns on other embodiment of this invention. It is sectional drawing corresponding to FIG. 1 which shows the hood structure for vehicles which concerns on other embodiment of this invention. It is the perspective view seen from the vehicle body diagonally back which shows the hood structure for vehicles which concerns on other embodiment of this invention. It is the perspective view seen from the vehicle body diagonally back which shows the hood structure for vehicles which concerns on other embodiment of this invention.

Explanation of symbols

12 Hood 14 Hood lock mechanism 16 Hood outer panel 18 Hood inner panel 22 Strike 30 Hood lock reinforcement (reinforcement member)
30C Vertical wall part of food lock reinforcement 34 Folded line of vertical wall part of food lock reinforcement 36 Extension part of food lock reinforcement 40 Mastic (adhesive)
42 Beads 44 Adhesive application part 50 Polygonal line 58 Beads 60 Shelf parts 64 Food lock reinforcement 66 Reinforcement member

Claims (5)

A vehicle hood structure having a reinforcing member between a hood outer panel and a hood inner panel at a front end portion of the hood,
A vertical wall formed in the reinforcing member and extending in the vertical direction;
An extending portion of the reinforcing member extending from the upper end portion of the vertical wall portion to the rear of the vehicle body along the hood outer panel;
Have a, the and the the vehicle body lower side of the extended portion hood front of the inner panel is disposed, to form a line along the vehicle width direction in the vertically intermediate portion of the vertical wall portion of the reinforcement member A vehicle hood structure characterized by that. The vehicle hood structure according to claim 1, wherein the extending portion of the reinforcing member and the hood outer panel are fixed with an adhesive. The hood structure for a vehicle according to claim 1, wherein a bead extending along a vehicle width direction is formed in an extending portion of the reinforcing member. 2. The vehicle hood structure according to claim 1, wherein an adhesive application portion is formed by cutting and raising an upper portion of the vehicle body at an intermediate portion in a front-rear direction of a striker mounting portion provided on the reinforcing member. The hood structure for a vehicle according to claim 1, wherein the broken line of the reinforcing member is a straight line along the vehicle width direction .

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