JP5235298B2 - Automotive hood structure - Google Patents

Description

  The present invention includes an outer panel and an inner panel provided on the back side of the outer panel, and the inner panel has low strength portions extending in the vehicle width direction on both outer and inner portions of a substantially middle portion in the front-rear direction. About the hood structure.

  FIG. 6 is a bottom view showing a conventional bonnet structure of an automobile. The bonnet 100 mainly includes an outer panel 102 and an inner panel 103, and the inner panel 103 is joined to the outer panel 102 with an adhesive or the like. In the drawing, the arrow (F) indicates the front of the vehicle, and the arrow (R) indicates the rear of the vehicle.

  The bonnet 100 is attached to a vehicle body (not shown) via a hinge member 105 at the rear edge thereof, and is supported so as to be rotatable about a hinge shaft (not shown).

  Further, the bonnet 100 is provided with bent beads (low-strength portions) 131C1, 131D1, 132a1 to 131a3 extending in the vehicle width direction on both outer and inner sides of a substantially intermediate portion in the front-rear direction of the inner panel 103. The conventional bonnet structure as described above is disclosed in Patent Document 1, for example.

  FIG. 7 is a view showing a state of the bonnet 100 before and after an excessive impact force is applied to the conventional bonnet 100 from the front direction. The outer panel 102 is folded to have the beads 131C1, 131D1, and 132a1 to 132a3. When an excessive impact force is applied from the front direction of the vehicle body, the bent beads 131C1, 131D1, 132a1 to 132a3 provided on the kk line in the vehicle width direction are bent as they are pushed by the impact force. Thus, the bonnet 1 is bent from the state shown in FIG. 7A into a generally U shape as shown in FIG. 7B.

  According to Patent Document 1 described below, the impact force can be absorbed by bending the bonnet 100.

JP-A-8-58624

  By the way, as a shape of the bonnet 100, there exists what is formed so that both the outer side parts of the vehicle width direction of the outer panel 102 may be located below with respect to the inner side part extended in a substantially horizontal direction. In this case, as shown in FIG. 7A, the inner panel 103 is positioned below the middle frame portion 132 constituting the inner portion, as shown in FIG. To be formed.

  In such a bonnet structure, when the folding beads 131C1, 131D1, 132a1 to 132a3 disclosed in Patent Document 1 are provided, an impact force is applied from the front direction of the vehicle body, and the bonnet 100 is bent as shown in FIG. As described above, the positions of the bent portions formed by the bent beads 132a1 to 132a3 are shifted to the rear of the vehicle with respect to the positions of the bent portions formed by the bent beads 131C1 and 131D1.

  This deviation hinders the deformation of the outer frame portion 131 and the middle frame portion 132 while the bonnet 100 is bent, and causes the bonnet 100 to be stretched.

  It is an object of the present invention to provide an automobile bonnet structure that can be smoothly bent when an excessive impact force is applied from the front side of the vehicle body, while suppressing the tension action.

An automobile bonnet structure according to the present invention is an automobile bonnet structure in which the bonnet is rotatably supported around a hinge member disposed at a rear portion of the bonnet, and is provided on an outer panel and a back side of the outer panel. The inner panel is formed such that both outer side portions in the vehicle width direction are positioned below the inner side portion, and is formed on both the outer side portion and the inner side portion in the substantially middle portion in the front-rear direction. A low-strength portion extending in the vehicle width direction and corresponding to a position where the vertical distance of the closed cross section between the outer panel and the inner panel is relatively small is the inner side of the inner panel in the vehicle width direction. And a low-strength portion corresponding to a position where the vertical distance of the closed cross section between the outer panel and the inner panel is relatively large. In both outer portions in the vehicle width direction of the panel, and is provided at a relatively rearward position, the low strength portion respectively provided on the both outer portion and the inner portion extends in the vehicle width direction in parallel to each other, of the hood The bent portions are bent along with the bending, and the low-strength portions provided on both the outer side portion and the inner side portion are provided so that the bent portions are aligned at the same position in the vehicle front-rear direction. .

According to this configuration, since the low strength portion formed at the inner portion is provided at the front position with respect to the low strength portion formed at both the outer portions, the inner side of the bonnet is bent at the time of the vehicle front collision. Both the bent portions of the outer portion and the outer portion can be aligned at the same position in the vehicle front-rear direction.
For this reason, it is possible to suppress the tensioning action that can occur when the bonnet is bent, and it is possible to smoothly bend the bonnet by the two bent portions aligned at the same position.

  In one embodiment of the present invention, a plurality of openings are provided in the inner portion of the inner panel along the vehicle width direction, and among the openings, the opening portion on the inner side in the vehicle width direction is the width in the front-rear direction. It is provided so that the low strength part of the inner part is located inside, and an opening part on the outer side in the vehicle width direction is provided so that the low strength part of the inner part is located at the rear end position in the front-rear direction. And

  According to this configuration, the inner portion can be reliably bent at a desired position in the vehicle width direction by the low-strength portion on the inner portion and the opening, so that the load caused by the impact force from the front direction can be It becomes possible to support efficiently by the inclined part between the outer part.

  In one embodiment of the present invention, a reinforcing portion extending in the vehicle width direction is provided at the rear end of the opening in the vehicle width direction outside.

  According to this configuration, the outer side of the inner portion can be more reliably bent at a desired position due to the difference in rigidity between the rear end edge portion of the opening and the reinforcing portion. For this reason, it can suppress that the outer side of an inner side part bends in the same position as this outer side part under the influence of the bending of the said outer side part.

  In one embodiment of the present invention, a second outer opening is provided outside the vehicle width direction outside opening, and a suction cup of the transfer device is arranged inside the vehicle width direction outside opening rear. It is characterized by having an adsorbed part to be adsorbed.

  According to this configuration, during production in which the bonnet is transported by the transport device provided with the suction cup portion, it can function as an attracted portion. Furthermore, since the rigidity of the rear portion of the low strength portion of the inner portion can be improved by the attracted portion, the bending at the low strength portion can be reliably realized when the bonnet is bent.

  In one embodiment of the present invention, the front end of the second outer opening is provided at the same position as the position where the low strength portion of the outer portion is formed in the front-rear direction, and the second outer opening A reinforcing portion extending in the vehicle width direction is provided at the front end of the opening.

  According to this configuration, the outer portion can be more reliably bent at a desired position due to the difference in rigidity between the front end edge of the second outer opening and the reinforcing portion.

  In one embodiment of the present invention, a longitudinal middle frame portion extending in the front-rear direction is provided between the openings, and a low-strength portion of the inner portion is disposed in the longitudinal middle frame portion.

  According to this configuration, the inner portion can be reliably bent at a desired position when the bonnet is bent due to a large rigidity difference between the low strength portion of the inner portion and the longitudinal middle frame portion.

According to the present invention, the low-strength portion corresponding to the position where the vertical distance of the closed cross section between the outer panel and the inner panel of the bonnet is relatively small is the inner portion in the vehicle width direction of the inner panel and is relatively The low strength part corresponding to the position where the vertical distance of the closed cross section between the outer panel and the inner panel of the bonnet is relatively large is provided on both outer side parts in the vehicle width direction of the inner panel and relative to each other. The low-strength parts provided on the rear side and the outer part and the inner part respectively extend in the vehicle width direction in parallel with each other and bend as the bonnet bends. the low intensity portion provided respectively on the parts, by providing as the bending portion are aligned in the same position in the vehicle longitudinal direction, with the bending of the hood, the inner portion, both flexion of the outer portion Since parts can be aligned in the same position in the vehicle longitudinal direction, to suppress the bracing effect it is possible to bend the hood smoothly.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing a front portion of an automobile provided with a bonnet structure according to the present embodiment. The bonnet 1 constitutes a part of the outer surface of the vehicle body by an outer panel 2 formed of a large single substantially trapezoidal metal panel. In the present embodiment, the outer panel 2 is formed such that both the outer side portions 21 and 21 in the vehicle width direction are positioned below the inner side portion 22 extending in the substantially horizontal direction.

  FIG. 2 is a bottom view showing the hood structure of the automobile according to the present embodiment. As shown in FIG. 2, the hood 1 of the present embodiment includes an outer panel 2, an inner panel 3, and both panels 2, 3. And a plurality of adhesive seals 4 to be bonded and held.

  The above-mentioned inner panel 3 is disposed on the back side (engine room side) of the outer panel 2 and is similarly formed of a metal panel body, ensuring the rigidity of the outer panel 2 and forming the back surface of the bonnet 1. .

  The inner panel 3 has increased rigidity by forming a plurality of substantially cross-sectionally shaped frame portions 30 protruding toward the engine room side. The frame portion 30 includes an outer frame portion 31 (31A, 31B, 31C, 31D) formed on the outer peripheral edge portion of the inner panel 3, and an intermediate frame portion 32 formed on the inner side portion. Three longitudinal middle frame portions 32a, 32a, 32a extending in the vehicle front-rear direction substantially radially from the front end, and between the longitudinal middle frame portions 32a, 32a, 32a and between the side end outer frame portions 31C, 31D in the vehicle width direction Are formed with a plurality of horizontal middle frame portions 32b.

  The front end outer frame portion 31A provided at the front end of the bonnet 1 is provided with a front end reinforcing portion 33 that further protrudes toward the engine room side in order to increase the support rigidity of the hood striker 34 and the like.

  At both outer end portions of the rear end outer frame portion 31B provided at the rear end of the bonnet 1, hinge fixing portions 35 that are fixed to the hinge member 5 provided on the vehicle body side are provided. By fixing the hinge fixing portion 35 to the hinge member 5, the bonnet 1 can be installed on the engine room so as to be freely opened and closed.

  3 (a) to 3 (c) are sectional views taken along lines XX, YY, and ZZ in FIG. 2, respectively. As shown in FIG. The outer panel 2 and the inner panel 3 are configured to be integrated by being joined by a joining flange 36 provided at an outer edge portion.

  By the way, the side end outer frame portions 31C and 31D provided on both outer side portions of the bonnet 1 have folded beads 31C1 and 31D1 having concave shapes in a bottom view as shown in FIGS. It is formed to extend in the vehicle width direction.

  Further, in accordance with the shapes of the outer portion 21 and the inner portion 22 in the outer panel 2, the side end outer frame portions 31C and 31D are formed to be positioned below the middle frame portion 32, and there is an inclination between them. The part is formed. The bent beads 31C1 and 31D1 extend inward in the vehicle width direction from the side end outer frame portions 31C and 31D, and a part thereof reaches the inclined portion.

  Further, each of the vertical middle frame portions 32a, 32a, 32a formed on the inner side of the bonnet 1 has a folded bead having a concave shape in a bottom view as shown in FIGS. 2, 3B, and 3C, respectively. 32a1 to 32a3 are formed to extend in the vehicle width direction.

  Here, the folded beads 31C1 and 31D1 of the side end outer frame portions 31C and 31D and the folded beads 32a1 to 32a3 of the middle frame portion 32 are all provided in a substantially middle portion in the vehicle longitudinal direction, as shown in FIGS. Are provided on the mn line and the nn line respectively extending in the vehicle width direction. In the present embodiment, the folded beads 32a1 to 32a3 formed on the middle frame portion 32 (vertical middle frame portion 32a) are folded beads 31C1 formed on the outer frame portion 31 (side end outer frame portions 31C and 31D). It is positioned forward by a distance L1 in the vehicle longitudinal direction with respect to 31D1.

  A plurality of openings 37 are provided in the inner frame portion 32 of the inner panel 3 along the vehicle width direction and the vehicle front-rear direction so as to sandwich the vertical middle frame portion 32a. Thus, by providing the opening part 37, the excess panel part is removed and the weight reduction of the inner panel 3 is achieved.

  Among these openings 37..., The inner one in the vehicle width direction is provided so that the center fold bead 32a2 is located within the width L2 in the vehicle front-rear direction, while the outer one in the vehicle width direction In FIG. 2, the bead 32a1 and the bead 32a3 are provided at the rear end position.

  Further, a horizontal middle frame portion 32b is provided at the rear end of the opening 37.

  Here, in the present embodiment, rear end openings 37 ′ and 37 ′ are further provided behind the outer opening 37, and are arranged on the outer side with respect to the front opening 37. In addition, on the inner side behind the opening 37, extending portions 38, 38 extending outward in the vehicle width direction from the longitudinal middle frame portions 32a, 32a are provided. In the present embodiment, in addition to the extending portions 38, 38, extending portions 38 ', 38' are also provided behind the front end outer frame portion 31A, and these are set in the attracted portion P described later.

  Further, the front ends of the rear end openings 37 ′ and 37 ′ are provided in the same position as the positions where the bead 31C1 and 31D1 are formed in the vehicle front-rear direction, and the rear end openings 37 ′ and 37 ′. A horizontal middle frame portion 32b is provided at the front end of the frame.

  The adhesive seals 4 are formed of a circular elastic body and are interposed between the outer panel 2 and the inner panel 3 so as to surround the openings 37... 37 ′ of the inner panel 3. Installed. By the adhesive seals 4..., The outer panel 2 and the inner panel 3 are bonded to prevent the outer panel 2 from floating from the inner panel 3.

  Here, the case where an excessive impact force is applied to the bonnet 1 of this embodiment shown in FIGS. 2 and 3 from the front direction of the vehicle body will be further described with reference to FIG. FIG. 4 is a diagram illustrating a state of the bonnet 1 before and after an excessive impact force is applied to the bonnet 1 of the present embodiment from the front direction.

  In the state shown in FIG. 4A, when an excessive impact force is applied to the bonnet 1 from the front direction of the vehicle body, as shown in FIG. The bent bead 31C1, 31D1, 32a1 to 32a3 is bent at the part, and the bonnet 1 is bent at the rear side with the hinge member 5 as the center at the same time as the bent part is bent along the mm line and the nn line. Is forcibly rotated in the opening direction.

  As described above, in the present embodiment, the bonnet 1 is deformed into a substantially square shape with respect to the impact force from the front direction, so that the impact force is absorbed, and the retreat of the bonnet 1 can be suppressed. It is like that.

  Here, in the prior art, since all the bent beads 131C1, 131D1, 132a1 to 132a3 (see FIGS. 6 and 7) are provided on one straight line extending in the vehicle width direction, when the bonnet 1 is bent, Although the phenomenon that the bent part of the frame part 132 shifted rearward with respect to the bent part of the outer frame part 131 has occurred, in the present embodiment, the folded beads 32a1 to 32a3 formed in the middle frame part 32 are used as the outer frame. Since the bent beads 31C1 and 31D1 formed in the portion 31 are provided at the front position, as shown in FIG. 4B, the two bent portions may be aligned at the same position in the vehicle longitudinal direction as the bonnet 1 is bent. it can.

  As described above, by aligning the two bent portions at the same position in the vehicle front-rear direction, it is possible to suppress the tension action that may occur in the conventional bonnet 100. Therefore, in the present embodiment, the bonnet 1 can be smoothly bent by the two bent portions aligned at the same position.

  However, if one of the outer frame portion 31 and the middle frame portion 32 is affected by the other bending while the bonnet 1 is bent, a bent portion may be formed only by the mm line or the nn line. There is. In this case, since the same behavior as in the conventional case is taken, a tensile action is eventually generated. Therefore, in order to suppress this, it is important to reliably bend each along the mm line and the nn line.

  In the present embodiment, the inner opening 37 is provided such that the bead 32a2 is located within the width L2 in the front-rear direction, and the outer opening 37 is folded at the rear end position so that the beads 32a1 to 32a3 are provided. Since it is provided so as to be positioned, the middle frame portion 32 can be reliably bent at a desired position along the nn line by the bent beads 32a1 and 32a3 of the middle frame portion 32 and the opening 37.

  As described above, by reliably performing the bending along the line nn, the load due to the impact force can be efficiently supported by the inclined portion between the middle frame portion 32 and the outer frame portion 31. It becomes. Therefore, the outer frame portion 31 can be prevented from being bent along the line nn due to the influence of the bending of the middle frame portion 32.

  Further, since the folded beads 32a1 to 32a3 are formed in the vertical middle frame portions 32a, 32a, and 32a of the middle frame portion 32, the rigidity with respect to the load in the front-rear direction is enhanced except for the folded beads 31a1 and 31a3. Therefore, when the bonnet 1 is bent, it can be reliably bent by the bent beads 32a1 to 32a3 due to a large difference in rigidity between the bent beads 32a1 to 32a3 and the vertical middle frame portions 32a, 32a, and 32a.

  Further, by providing the horizontal middle frame portions 32b and 32b along the rear ends of the outer opening portions 37 and 37, the middle frame portion is caused by the difference in rigidity between the rear end edge portion of the opening portion 37 and the horizontal middle frame portion 32b. The outer side of 32 can be more reliably bent along the nn line. Thereby, it can suppress that the outer side of the middle frame part 32 receives the influence of the bending of the outer frame part 31, and it bends along a m-m line.

  In addition, by providing the extending portions 38 and 38 (adsorbed portions P) inside the openings 37 and 37, the rigidity behind the folded beads 32a1 and 32a3 can be improved. Thereby, since the difference in rigidity between the folded beads 32a1 and 32a3 and the rear thereof can be further increased, the folding at the folded beads 32a1 and 32a3 can be reliably realized.

  Further, the front ends of the rear end openings 37 ′ and 37 ′ are provided so as to be at the same positions as the positions where the folded beads 31C1 and 31D1 are formed, and the horizontal middle frame is formed at the front ends of the rear end openings 37 ′ and 37 ′. By providing the portion 32b, the outer frame portion 31 is reliably bent at a desired position along the line m-m by the difference in rigidity between the front end edge portion of the rear end opening portion 37 ′ and the horizontal middle frame portion 32b. Can do.

  In the present embodiment, a bent bead having a concave shape in bottom view is provided in order to bend the bonnet 1 at a desired position when an impact force is applied from the front direction. It is not limited. For example, an opening may be formed in the same range as when a folded bead is provided, and a portion having a lower strength than the surroundings may be formed. Moreover, it may replace with a bending bead and you may make it provide the weak part made thinner than others.

  By the way, when the bonnet 1 is assembled, the plane formed by the extending portions 38, 38, 38 ′, 38 ′ (see FIG. 2) is set to the attracted portions P, P. 5 can be carried out by the carrying device 60 as shown in FIG.

The conveyance operation of the inner panel 3 at the time of assembling the bonnet 1 will be described with reference to FIG.
The bonnet 1 is assembled by first pressing the inner panel 3 and the outer panel 2 from different steel sheet sheets with a press machine, and transporting the press-molded inner panel 3 and outer panel 2 to the assembly line by a conveyor. Thereafter, the two panels 2 and 3 are combined and welded by a welding machine.

  For this reason, the inner panel 3 is conveyed by the conveying device after being press-molded. FIG. 5 shows a transfer operation of the inner panel 3 by the transfer device 60.

  This transport device 60 is configured such that a plurality of suction cups 63 slidable in the vertical direction are provided on a head part 62 mounted on a base 61 and the inner panel 3 is adsorbed at the tip of the suction cups 63. Yes. Further, a laminating pallet 64 for laminating the inner panel 3 after press molding is installed on the side of the conveying device 60.

  The carrying work is performed by sucking the press-molded inner panels 3 one by one with the suction cups 63, and moving the head part 62 to a desired position.

  At this time, the inner panel 3 is adsorbed by the suction cups 63 of the conveying device 60. However, since the inner panel 3 is adsorbed after the press molding is performed, the portion of the adsorbed part to be adsorbed is limited. .

  In the inner panel 3 of the present embodiment, as shown in FIG. 2, the attracted portions P are set in the above-described extending portions 38 and 8 and the flat portions 38 ′ and 38 ′ behind the front end outer frame portion 31 </ b> A. That is, the function of the site | part which improves the workability | operativity of a conveyance operation | work is obtained using the extension parts 38 and 38 which raise the rigidity of the back of the bending beads 32a1 and 32a3.

  For this reason, the extension parts 38 and 38 improve the function as the to-be-adsorbed part P used at the time of production, and the rigidity of the site | part behind the folding beads 32a1 and 32a3 outside the middle frame part 32, and the folding beads 32a1 , 32a3 can be combined with the function of reliably realizing the bending.

  Therefore, according to the inner panel 3 of the present embodiment, since the extending portion 38 can be used more efficiently, many openings 37 can be provided, and the bonnet 1 can be reduced in weight.

In correspondence between the configuration of the present invention and the above-described embodiment,
The reinforcing portion of the present invention corresponds to the horizontal middle frame portion 32b,
Similarly,
The second outer opening corresponds to the rear end opening 37 ′,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

The perspective view which shows the front part of the motor vehicle provided with the bonnet structure which concerns on this embodiment. The bottom view which shows the bonnet structure of the motor vehicle which concerns on this embodiment. (A) XX sectional view taken on the line in FIG. 2, (b) YY sectional view taken on the line in FIG. 2, (c) ZZ sectional view taken on the line in FIG. The figure which shows the state of the bonnet before and after an excessive impact force is added to the bonnet of this embodiment from a front direction. The side view explaining the conveyance state of the inner panel by a conveying apparatus. The bottom view which shows the bonnet structure of the conventional motor vehicle. The figure which shows the state of the bonnet before and after the excessive impact force is added to the conventional bonnet from the front direction.

DESCRIPTION OF SYMBOLS 1 ... Bonnet 2 ... Outer panel 3 ... Inner panel 31C1, 31D1 ... Folding bead (low strength part of both outer side parts)
32a ... Vertical middle frame portions 32a1, 32a2, 32a3 ... Folded beads (low strength portion on the inner side)
32b ... Horizontal middle frame part 37 ... Opening part 37 '... Rear end opening part 5 ... Hinge member 60 ... Conveying device 63 ... Suction cup part P ... Adsorbed part

Claims (6)

A bonnet structure of an automobile in which the bonnet is rotatably supported around a hinge member disposed at the rear of the bonnet,
Outer panel,
An inner panel provided on the back side of the outer panel,
The inner panel is formed such that both outer portions in the vehicle width direction are positioned below the inner portion, and has a low strength extending in the vehicle width direction on the outer portion and the inner portion of the substantially middle portion in the front-rear direction. Part
A low-strength portion corresponding to a position where the vertical distance of the closed cross section between the outer panel and the inner panel is relatively small is provided on the inner side in the vehicle width direction of the inner panel and at a relatively forward position. ,
Low-strength portions corresponding to positions where the vertical distance of the closed cross section between the outer panel and the inner panel is relatively large are provided at both outer portions in the vehicle width direction of the inner panel and at relatively rear positions. And
The low-strength portions provided on both the outer and inner portions respectively extend in the vehicle width direction in parallel with each other, and become bent portions as the bonnet is bent.
The bonnet structure of an automobile, wherein the low-strength portions provided on both the outer side portion and the inner side portion are provided so that the bent portions are aligned at the same position in the vehicle front-rear direction . In the inner part of the inner panel, a plurality of openings are provided along the vehicle width direction,
Among the openings, an opening on the inner side in the vehicle width direction is provided so that the low-strength portion of the inner part is positioned within the width in the front-rear direction,
The automobile bonnet structure according to claim 1, wherein an opening on the outer side in the vehicle width direction is provided so that the low-strength portion on the inner side is located at the rear end position in the front-rear direction. The hood structure for an automobile according to claim 2, wherein a reinforcing portion extending in the vehicle width direction is provided at a rear end of the opening portion on the outer side in the vehicle width direction. A second outer opening is provided outside the vehicle width direction outer opening, and a second outer opening is provided.
The bonnet structure for an automobile according to claim 3, further comprising an adsorbed part to which the suction cup of the conveying device is adsorbed inside the rear side of the opening on the outer side in the vehicle width direction. While providing the front end of the second outer opening so as to be in the same position as the position where the low strength portion of the outer portion is formed in the front-rear direction,
The automobile bonnet structure according to claim 4, wherein a reinforcing portion extending in a vehicle width direction is provided at a front end of the second outer opening. While providing a longitudinal middle frame portion extending in the front-rear direction between the openings,
The bonnet structure for an automobile according to any one of claims 2 to 5, wherein the low-strength portion of the inner portion is disposed in the vertical middle frame portion.

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