JP4407599B2 - Body front support structure - Google Patents

Description

  The present invention relates to a vehicle body front support structure in which a fender panel and an engine hood are attached to a vehicle body skeleton member at a vehicle body front portion of an automobile.

Patent Document 1 below discloses a structure in which hood cushions (also referred to as dampers) are arranged in front portions of left and right upper frames that support the periphery of the engine hood, and the engine hood is supported by these hood cushions. . In this structure, the upper portion of the hood cushion having a truncated cone shape and the tapered surface formed on the side wall of the hood inner panel are in close contact with each other.
Japanese Utility Model Publication No. 2-64479

  However, in the structure of Patent Document 1, in order to prevent interference between the support position of the fender panel and the disposition position of the hood cushion on the left and right upper frames, it is necessary to separate the two in the longitudinal direction of the vehicle body. As a result, one of the intervals between the support position of the fender panel or the disposition position of the hood cushion and the parting line between the front end of both ends in the vehicle width direction of the engine hood and the upper front end of the fender panel is the other. Longer than that. For this reason, the variation in the assembling position on the side where the interval between the support position of the fender panel and the disposition position of the hood cushion is longer than that of the other part becomes larger, and the assembly of the parting part in the engine hood The attaching accuracy deteriorates.

  In view of the above facts, the present invention has an object to provide a vehicle body front support structure that can improve the assembling accuracy of the parting part between the front end of both ends in the vehicle width direction of the engine hood and the upper front end of the fender panel. .

The vehicle body front part support structure of the present invention according to claim 1 is a vehicle body skeleton member disposed on the left and right sides of the engine room, and a fender panel fixed by a plurality of attachment portions on the upper surface of the vehicle body skeleton member, An engine hood that covers an upper portion of the engine room, a hood cushion that supports the engine hood on the vehicle body skeleton member, and an upper portion of the attachment portion on the vehicle body front side of the plurality of attachment portions at the upper portion of the vehicle body skeleton member An upper wall portion for mounting the fender panel; a vertical impact load absorbing portion formed on a lower side of the upper wall portion; and the vehicle body skeleton formed from the upper wall portion toward the inside in the vehicle width direction. It has a hood cushion support portion protruding from member to the vehicle width direction inner side to support the hood cushion, a support bracket having a, a, in the support bracket The vertical wall portion is formed from the vehicle width direction inner edge of the hood cushion support portion toward the vehicle body downward, the inclined wall portion is formed from the lower end edge of the vertical wall portion to the vehicle width direction outer lower, A flange formed from the lower end edge of the inclined wall portion toward the lower side of the vehicle body is fixed to the vehicle width direction inner side wall portion of the vehicle body skeleton member. The interval along the width direction is wider than the interval along the vehicle width direction of the vertical wall portions of the left and right support brackets.

A plurality of mounting portions for fixing the fender panel are provided on the upper surface of the vehicle body skeleton member that is disposed on the left and right sides of the engine room and is a strength member for supporting a load from the outside. On the upper part of the mounting part on the front side of the vehicle body, there is an upper wall part for attaching the fender panel, a vertical impact load absorbing part formed on the lower side of the upper wall part, and from the upper wall part to the inside in the vehicle width direction And a hood cushion support portion that protrudes inward in the vehicle width direction from the vehicle body skeleton member and supports the hood cushion. As a result, the distance along the vehicle body front-rear direction from the parting portion that becomes the boundary between the front end of both ends in the vehicle width direction of the engine hood and the upper front end of the fender panel to the mounting portion on the front side of the vehicle body of the fender panel, and the hood The level difference of the parting part between the engine hood and the fender panel based on the difference with the distance along the vehicle body longitudinal direction to the cushion can be reduced. In addition, when the impactor hits the fender panel and an impact load is applied to the fender panel from the upper side of the vehicle body to the lower side of the vehicle body, it is formed on the lower side of the upper wall portion for attaching the fender panel of the support bracket provided on the vehicle body skeleton member. The vertical impact load absorbing portion is deformed to absorb the impact load. Further, a hood cushion support portion in the support bracket is formed from the upper wall portion toward the inside in the vehicle width direction and protrudes inward in the vehicle width direction from the vehicle body skeleton member . In addition, a vertical wall portion is formed from the vehicle width direction inner edge of the hood cushion support portion toward the vehicle body lower side, and an inclined wall portion is formed from the lower end edge of the vertical wall portion to the vehicle width direction outer lower side to be inclined. A flange formed from the lower edge of the wall portion toward the lower side of the vehicle body is fixed to the vehicle width direction inner side wall portion of the vehicle body skeleton member , and in the vehicle width direction of the vehicle width direction inner wall portion of the left and right vehicle body skeleton members. The interval along the vehicle is wider than the interval along the vehicle width direction of the vertical wall portion of the left and right support brackets. As a result, the space in the vehicle width direction in the engine room is widened below the mounting portion of the hood cushion in the support brackets provided on the left and right sides of the vehicle body.

The present invention is claimed in claim 2, wherein, in the vehicle body front support structure as claimed in claim 1, wherein the hood cushion support portion of the support bracket, the vertical wall portion, the sloped wall portion and the flange, in the support bracket It is formed of a plate material different from other parts.

A plate material that constitutes the support bracket as a hood cushion support portion, a vertical wall portion, an inclined wall portion, and a flange is formed of a plate material that is different from a plate material that constitutes another part of the support bracket. For this reason, by changing the plate thickness of each plate material, while supporting the support of the engine hood by the hood cushion, it is supported when an impact load acts on the upper edge of the fender panel from the top of the vehicle body to the bottom of the vehicle body. The bracket can be easily deformed.

The present invention according to claim 1 improves the assembly accuracy of the parting portion that is the boundary between the front end of both ends in the vehicle width direction of the engine hood and the upper front end of the fender panel, and reduces the impact received by the collision object. And the space in an engine room can be enlarged.

According to the present invention, the support bracket can be easily mounted when an impact load acts on the upper edge of the fender panel from the upper side of the vehicle body to the lower side of the vehicle body while ensuring the support rigidity of the engine hood by the hood cushion. Can be deformed.

  1st Embodiment of the vehicle body front part support structure in this invention is described according to FIGS.

  In the figure, the arrow UP indicates the upper side of the vehicle body, the arrow FR in the figure indicates the front of the vehicle body, and the arrow IN in the figure indicates the vehicle width inside direction.

  As shown in FIG. 4, in this embodiment, left and right apron upper members 12 as vehicle body skeleton members are arranged on the side of an engine room 10 formed at the front of the vehicle body of the automobile. These apron upper members 12 is arranged with its longitudinal direction along the longitudinal direction of the vehicle body. FIG. 4 shows only the front end portion of the apron upper member 12 on the right side of the vehicle body. The apron upper member 12 has an open cross-sectional structure in which only the front end portion has an L-shaped cross section, and the other portions are closed cross sections having a rectangular cross section. It has a structure.

  On the upper surface of the upper wall portion 12A of the apron upper member 12, a fender panel 16 is fixed via a support bracket 14 to a plurality of mounting portions 15 set at predetermined intervals in the longitudinal direction of the vehicle body. FIG. 4 shows only the attachment portion 15 at the front of the vehicle body.

  The support bracket 14 is formed by cutting a plate material into a predetermined shape (deployed shape) and then bending it.

  As shown in FIG. 2, a vertical wall portion 16 </ b> B bent downward from the vehicle body is formed from the upper end edge portion 16 </ b> A of the fender panel 16, and from the lower end edge portion of the vertical wall portion 16 </ b> B in the vehicle width direction. A flange 16 </ b> C bent toward the direction is formed. Further, mounting holes 18 are formed in the flange 16C of the fender panel 16 at a predetermined interval in the longitudinal direction of the vehicle body.

  As shown in FIG. 3, the side cross-sectional shape of the support bracket 14 (cross-sectional shape by a vertical cross section along the vehicle body longitudinal direction) is a substantially hat shape with the opening facing downward, and the upper wall portion 14A is The flange 16C of the fender panel 16 is supported from below. A mounting hole 20 is formed in the upper wall portion 14A. A bolt 22 inserted into the mounting hole 18 and the mounting hole 20 from above the vehicle body and a nut 24 disposed on the lower surface side of the upper wall portion 14A. The flange 16C of the fender panel 16 is fixed to the upper wall portion 14A of the support bracket 14.

  A front inclined wall portion 14B is formed from the front end portion of the upper wall portion 14A of the support bracket 14 toward the vehicle body obliquely downward, and a front vertical wall portion from the front end portion of the front inclined wall portion 14B toward the vehicle body downward. 14C is formed. In addition, a connecting portion between the front inclined wall portion 14B and the front vertical wall portion 14C is a vertical impact load absorbing portion 26. Further, a front flange 14D is formed from the lower end portion of the front vertical wall portion 14C toward the front of the vehicle body, and the front flange 14D is welded to the upper surface of the upper wall portion 12A of the apron upper member 12.

  On the other hand, a rear inclined wall portion 14E is formed from the rear end portion of the upper wall portion 14A of the support bracket 14 obliquely downward to the rear of the vehicle body, and from the rear end portion of the rear inclined wall portion 14E to the lower portion of the vehicle body. A rear vertical wall portion 14F is formed. Further, a connecting portion between the rear inclined wall portion 14E and the rear vertical wall portion 14F is a vertical impact load absorbing portion 28. Further, a rear flange 14G is formed from the lower end portion of the rear vertical wall portion 14F toward the rear of the vehicle body, and the rear flange 14G is welded to the upper surface of the upper wall portion 12A of the apron upper member 12.

  Therefore, when an impact load (arrow F1 in FIG. 3) acts on the upper edge 16A of the fender panel 16 from the upper side of the vehicle body to the lower side of the vehicle body, the front inclined wall portion 14B and the front vertical wall portion 14C of the support bracket 14 are applied. Is deformed in a direction in which the opening angle θ1 of the vertical impact load absorbing portion 26 is narrowed, and the rear inclined wall portion 14E and the rear vertical wall portion 14F are deformed in a direction in which the opening angle θ2 of the vertical impact load absorbing portion 28 is narrowed. It is supposed to be.

  As a result, as shown in FIG. 5, when the collision body K hits the upper edge 16A of the fender panel 16 from above the vehicle body, the support bracket 14 is crushed to absorb the vertical impact load F1, and the collision body The impact acting on K can be reduced.

  As shown in FIG. 4, the plurality of mounting portions 15 provided on the upper wall portion 12 </ b> A of the apron upper member 12 for supporting the fender panel 16 are arranged on the mounting portion 15 located on the most front side of the vehicle body. In the support bracket 14, a hood cushion support portion 14 </ b> H is integrally formed on the inner side in the vehicle width direction of the upper wall portion 14 </ b> A that supports the fender panel 16.

  The hood cushion support portion 14H is a horizontal plate portion having the same front-rear width W1 as the upper wall portion 14A and extending inward in the vehicle width direction, and an attachment hole 30 formed in the central portion of the hood cushion support portion 14H. The lower part 32A of the hood cushion 32 is fixed to.

  Note that the hood cushion 32 has a well-known structure made of an elastic body such as rubber having a cylindrical shape, for example, and a detailed description thereof will be omitted.

  As shown in FIG. 2, the engine hood 36 covering the upper portion of the engine room 10 is attached to the rear end portion of the apron upper member 12 through a hinge (not shown) so as to be opened and closed. The engine hood 36 includes a hood outer panel 38 that constitutes the upper portion of the engine hood 36 and a hood inner panel 40 that constitutes the lower portion of the engine hood 36. The outer peripheral edge 38A of the hood outer panel 38 and the hood inner panel 40 are provided. The outer peripheral edge portion 40A is coupled to each other by femming.

  In the vicinity of the outer peripheral edge portion 40A of the hood inner panel 40, a bone portion 40B separated from the hood outer panel 38 is formed along the outer peripheral edge portion 40A. In addition, the lower surface 40C of the bone portion 40B of the hood inner panel 40 abuts on the upper end portion 32B of the hood cushion 32 when the engine hood 36 is in a closed state, and the engine hood 36 is caused to move to the hood cushion support portion 14H by the hood cushion 32. It is supported by.

  That is, in the present embodiment, as shown in FIG. 1, the engine is located on the inner side (right side) in the vehicle width direction of the shaft center P <b> 1 of the bolt 22, which is the most fixed portion of the fender panel 16 to the apron upper member 12. An axis P2 of the hood cushion 32 that supports the hood 36 on the apron upper member 12 is set. As a result, the shaft of the bolt 22 serving as the attachment portion of the fender panel 16 to the apron upper member 12 from the parting portion P3 which is the boundary between the front end of both ends in the vehicle width direction of the engine hood 36 and the upper front end of the fender panel 16. The distance S1 along the longitudinal direction of the vehicle body to the center P1 is equal to the distance S2 along the longitudinal direction of the vehicle body from the parting portion P3 to the axis P2 of the hood cushion 32 (S1 = S2), and the distances S1, S2 are It is getting shorter.

  Therefore, by supporting the fender panel 16 and the engine hood 36 at these support points P1 and P2, the assembly positions of the engine hood 36 and the fender panel 16 at the parting portion P3 generated by the distances S1 and S2 are determined. The vertical variation is reduced.

  As shown in FIG. 2, a vertical wall portion 14J is formed from the vehicle width direction inner edge portion of the hood cushion support portion 14H in the support bracket 14 toward the vehicle body lower side, and from the lower end edge portion of the vertical wall portion 14J. Is formed with an inclined wall portion 14K toward the lower outside in the vehicle width direction. Further, a flange 14L is formed from the lower end edge of the inclined wall portion 14K toward the lower side of the vehicle body, and this flange 14L is welded to the inner side wall portion 12B of the apron upper member 12 in the vehicle width direction.

  Therefore, the space | interval L1 along the vehicle width direction of the vehicle width direction inner side wall part 12B in the left and right apron upper members 12 is wider than the space | interval L2 along the vehicle width direction of the left and right vertical wall part 14J (L1>). L2).

  Further, as shown in FIG. 5, when the collision body K hits the upper edge 16A of the fender panel 16 from above the vehicle body, the vertical wall load 14J and the inclined wall 14K are deformed to deform the vertical impact load F1. The impact acting on the collision body K can be further reduced.

  The vertical wall portion 14J and the inclined wall portion 14K are not deformed when the engine hood 36 is tightly closed, and an impact load (from FIG. 3) is applied to the upper edge 16A of the fender panel 16 from above the vehicle body to below the vehicle body. Deformation occurs when the arrow F1) acts.

  Next, the operation of this embodiment will be described.

  In the present embodiment, as shown in FIG. 1, the engine hood 36 is placed on the inner side in the vehicle width direction of the shaft center P <b> 1 of the bolt 22, which is the most adhering portion of the fender panel 16 to the apron upper member 12. An axis P2 of the hood cushion 32 supported by the member 12 is set. As a result, the shaft of the bolt 22 serving as the attachment portion of the fender panel 16 to the apron upper member 12 from the parting portion P3 which is the boundary between the front end of both ends in the vehicle width direction of the engine hood 36 and the upper front end of the fender panel 16. The distance S1 along the longitudinal direction of the vehicle body to the center P1 and the distance S2 along the longitudinal direction of the vehicle body from the parting portion P3 to the axis P2 of the hood cushion 32 can be made equal (S1 = S2) and the distances S1, S2 Becomes shorter.

  Therefore, by supporting the fender panel 16 and the engine hood 36 at these support points P1 and P2, the assembly positions of the engine hood 36 and the fender panel 16 at the parting portion P3 generated by the distances S1 and S2 are determined. The vertical variation is reduced, and the assembly accuracy of the parting part P3 can be improved. That is, the step in the vertical direction of the vehicle body at the parting part P3 between the fender panel 16 and the engine hood 36 based on the difference between the distances S1 and S2 can be reduced.

  Further, in the present embodiment, when an impact load (arrow F1 in FIG. 3) acts on the upper edge 16A of the fender panel 16 from the upper side of the vehicle body to the lower side of the vehicle body, the front inclined wall portion 14B of the support bracket 14, The front vertical wall portion 14C is deformed in the direction in which the opening angle θ1 is narrowed starting from the vertical impact load absorbing portion 26, and the rear inclined wall portion 14E and the rear vertical wall portion 14F are starting from the vertical impact load absorbing portion 28. Thus, the opening angle θ2 is deformed in a narrowing direction. At this time, the vertical wall portion 14J and the inclined wall portion 14K of the support bracket 14 are also deformed.

  As a result, as shown in FIG. 5, the support bracket 14 is crushed to absorb the vertical impact load F <b> 1 and reduce the impact acting on the collision body K.

  Further, in the present embodiment, as shown in FIG. 2, a vertical wall portion 14J is formed from the inner edge of the hood cushion support portion 14H in the vehicle width direction toward the lower side of the vehicle body, and the lower end of the vertical wall portion 14J. An inclined wall portion 14K is formed from the edge portion toward the lower outside in the vehicle width direction. As a result, the distance L1 along the vehicle width direction of the inner side wall portion 12B in the vehicle width direction of the left and right apron upper members 12 is wider than the distance L2 along the vehicle width direction of the left and right vertical wall portions 14J (L1). > L2). For this reason, the space in the engine room 10 can be enlarged.

  Next, a second embodiment of the vehicle body front support structure according to the present invention will be described with reference to FIGS.

  In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIGS. 6 and 7, in this embodiment, the upper wall portion 14A, the front inclined wall portion 14B, the front vertical wall portion 14C, the front flange 14D, the rear inclined wall portion 14E, and the rear vertical wall portion of the support bracket 14 are provided. 14F, the rear flange 14G, and the hood cushion support portion 14H, the vertical wall portion 14J, the inclined wall portion 14K, and the flange 14L of the support bracket 14 are formed of different plate materials.

  Specifically, the vehicle width direction outer side portion 14M of the hood cushion support portion 14H extends below the upper wall portion 14A of the support bracket 14. Further, the vehicle width direction outer side portion 14M of the hood cushion support portion 14H is fastened together with a bolt 22 and a nut 24 to a joint portion between the upper wall portion 14A of the support bracket 14 and the flange 16C of the fender panel 16.

  Therefore, also in this embodiment, the same effect as the first embodiment can be obtained. Further, since the support bracket 14 is composed of two plates, for example, an upper wall portion 14A that supports the fender panel 16, a front inclined wall portion 14B, a front vertical wall portion 14C, a front flange 14D, a rear inclined wall portion 14E, The plate thickness M1 of the rear vertical wall portion 14F and the rear flange 14G is set thinner than the plate thickness M2 of the hood cushion support portion 14H, the vertical wall portion 14J, the inclined wall portion 14K, and the flange 14L that support the hood cushion 32 (M1). <M2) By securing the support rigidity of the engine hood 36 by the hood cushion 32 (the hood cushion support portion 14H is not deformed when the engine hood 36 is strongly closed), the upper edge of the fender panel 16 is secured. When an impact load (arrow F1 in FIG. 3) is applied to 16A from the upper side of the vehicle body to the lower side of the vehicle body, the support bracket 14 can be easily deformed. Can.

  The support bracket 14 may be composed of three plates.

  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 each of the above-described embodiments, the upper wall portion 14A of the support bracket 14 provided on the attachment portion 15 which is the foremost end of the plurality of attachment portions 15 along the vehicle body longitudinal direction to the apron upper member 12 in the fender panel 16. The hood cushion 32 is disposed on the inner side in the vehicle width direction, but instead of this, the mounting portion 15 of the front half of the plurality of mounting portions 15 along the vehicle body front-rear direction to the apron upper member 12 in the fender panel 16. The hood cushion 32 may be disposed on the inner side in the vehicle width direction of the upper wall portion 14A of the support bracket 14 provided on the front side.

In addition, the vehicle width direction of the upper wall portion 14A of the support bracket 14 (mounting portion), in addition to just beside the upper wall portion 14A of the support bracket 14, somewhat to the vehicle longitudinal direction with respect to the upper wall portion 14A of the support bracket 14 The position may be shifted.

It is a top view which shows a fender panel and an engine hood with an alternate long and two short dashes line in a vehicle body front support structure according to a first embodiment of the present invention. FIG. 2 is an enlarged cross section along line 2-2 in FIG. 1. FIG. 3 is an enlarged cross section taken along line 3-3 in FIG. 2. It is the perspective view which looked at the vehicle body front part support structure which concerns on 1st Embodiment of this invention from the vehicle body diagonally forward inner side which shows a fender panel with a dashed-two dotted line. It is sectional drawing corresponding to FIG. 2 which shows the deformation | transformation state of the vehicle body front part support structure which concerns on 1st Embodiment of this invention. It is sectional drawing corresponding to FIG. 2 which shows the vehicle body front part support structure which concerns on 2nd Embodiment of this invention. It is the perspective view which looked at the vehicle body front part support structure which concerns on 2nd Embodiment of this invention from the vehicle body diagonally forward inner side which shows a fender panel with a dashed-two dotted line.

Explanation of symbols

10 Engine room 12 Apron upper member (body frame member)
14 support bracket 14A upper wall portion of support bracket 14B front inclined wall portion of support bracket 14C front vertical wall portion of support bracket 14D front flange of support bracket 14E rear tilt wall portion of support bracket 14F rear vertical wall portion of support bracket 14G support Rear flange of bracket 14H Hood cushion support portion of support bracket 14J Vertical wall portion of support bracket 14K Inclined wall portion of support bracket 14L Flange of support bracket 14M Outside width direction of food cushion support portion 15 Fender panel mounting portion 16 Fender Panel 26 Vertical impact load absorbing portion of support bracket 28 Vertical impact load absorbing portion of support bracket 32 Hood cushion 36 Engine hood P3 The front end of both ends in the vehicle width direction of the engine hood and the fender panel Parting portion serving as a boundary between the parts front end

Claims (2)

Body skeleton members arranged on the left and right sides of the engine room,
A fender panel fixed by a plurality of attachment portions on the upper surface of the vehicle body skeleton member;
An engine hood covering the upper part of the engine room;
A hood cushion for supporting the engine hood on the body frame member;
In the upper part of the vehicle body skeleton member, an upper wall part that is provided on an upper part of the attachment part on the vehicle body front side of the plurality of attachment parts, and that is formed on the lower side of the upper wall part for attaching the fender panel. A support bracket comprising: a direction impact load absorbing portion; and a hood cushion support portion that is formed inward in the vehicle width direction from the upper wall portion and protrudes inward in the vehicle width direction from the vehicle body skeleton member to support the hood cushion. ,
Have
A vertical wall portion is formed from the vehicle width direction inner edge of the hood cushion support portion in the support bracket toward the vehicle body lower side, and an inclined wall portion is formed from the lower end edge of the vertical wall portion to the vehicle width direction outer lower side. A flange formed from the lower edge of the inclined wall portion toward the lower side of the vehicle body is fixed to the inner side wall portion in the vehicle width direction of the vehicle body skeleton member , and the vehicle width direction inner sides of the left and right vehicle body skeleton members front vehicle body support structure, characterized in that spacing along the vehicle width direction of the wall portion is wider than along the vehicle width direction of the vertical wall portions of the left and right of the support bracket spacing. The hood cushion support portion, the vertical wall portion, the inclined wall portion, and the flange in the support bracket are formed of a plate material different from other portions in the support bracket. Car body front support structure.

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