JP6488760B2 - Body structure - Google Patents

Description

  The present invention relates to a vehicle body structure.

  2. Description of the Related Art Conventionally, a vehicle body structure is known in which side sills extending in the vehicle front-rear direction are arranged at lower portions on both sides in a vehicle width direction of a vehicle and a jack-up point is set at the lower portion of the side sill (see, for example, Patent Document 1). The side sill is generally made of metal such as steel.

  However, when the side sill is made of a fiber reinforced resin, since the fiber reinforced resin has a lower strength than a metal such as steel, it is difficult to support the load when jacking up with only the side sill. In such a case, for example, a metal frame is provided on the inner side in the vehicle width direction from the side sill, a bracket extending from the frame to the outer side in the vehicle width direction is provided, and a jack-up point is set on the bracket. .

Japanese Utility Model Publication No. 3-44089

  In the above-described vehicle body structure, there is a problem in that the weight of the vehicle increases due to the provision of the metal frame, bracket, and the like, and the manufacturing cost increases accordingly.

  Therefore, an object of the present invention is to provide a vehicle body structure that does not require a metal frame, bracket, or the like and can suppress an increase in the weight and manufacturing cost of the vehicle.

  In the vehicle body structure according to the present invention, an energy absorber is disposed inside the front end portion of the side sill, and a jackup member is joined to the lower portion of the side sill located below the energy absorber.

  The energy absorber is arranged inside the front end of the side sill, and the jack-up member is joined to the lower part of the side sill located below the energy absorber, thereby joining the jack-up member in the side sill made of fiber reinforced resin. Can be reinforced. For this reason, it becomes possible to support the load at the time of jackup by a side sill. Therefore, according to the vehicle body structure of the present invention, it is not necessary to provide a metal frame, bracket, etc., and an increase in the weight of the vehicle and an increase in manufacturing cost can be suppressed.

It is a perspective view which shows the principal part of the vehicle body structure which concerns on 1st Embodiment of this invention. 1 is a side sectional view of a vehicle body structure according to a first embodiment of the present invention. It is the sectional view on the AA line of FIG. It is a principal part expanded side sectional view of the vehicle body structure which concerns on 1st Embodiment of this invention. It is a perspective view of an energy absorber. It is a partially broken perspective view of an energy absorber. It is a principal part expanded side sectional view of the vehicle body structure which concerns on 2nd Embodiment of this invention. It is a principal part expanded side sectional view of the vehicle body structure which concerns on 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the arrow FR indicates the front of the vehicle, the arrow UPR indicates the upper side of the vehicle, and the arrow IN indicates the inner side in the vehicle width direction.

[First Embodiment]
A vehicle body structure according to the first embodiment will be described with reference to FIGS.

  As shown in FIG. 1, side sills 1 extending in the vehicle front-rear direction are disposed at lower portions on both sides in the vehicle width direction of the vehicle. A pillar (front pillar) 2 extending in the vehicle vertical direction is connected to the upper portion of the side sill 1. Specifically, the side sill 1 is formed of a side sill outer panel 3 and a side sill inner panel 4 in a closed cross-sectional structure. Further, the pillar 2 is constituted by a pillar outer panel 5 and a pillar inner panel 6 in a closed cross-sectional structure. These side sill 1 and pillar 2 are formed of a fiber reinforced resin having a higher specific strength than a metal such as steel. As the fiber reinforced resin, various fiber reinforced resins such as carbon fiber reinforced resin (CFRP), glass fiber reinforced resin (GFRP), and aramid fiber reinforced resin (AFRP) can be used.

  As shown in FIGS. 1 to 4, energy in the vehicle front-rear direction input load from the tire (front wheel) to the side sill 1 at the time of a frontal collision of the vehicle is absorbed in the front end portion of the side sill 1 in the vehicle front-rear direction. An energy absorber 7 is disposed and held. For this reason, the side sill 1 also functions as a holding member that holds the energy absorber 7, and it is not necessary to separately provide the holding member on the side sill 1. The energy absorber 7 of the present embodiment is crushed between the front wheel and the side sill 1 when a front wheel (not shown) that moves backward is in contact with the front end of the side sill 1 during a frontal collision of the vehicle. It functions to absorb energy. In the present embodiment, the front end of the side sill 1 opens in the vehicle front-rear direction, and the front end of the energy absorber 7 extends outward from the inside of the side sill 1. The energy absorber 7 extends in the vehicle front-rear direction from below the front wall 2a of the pillar 2 to below the rear wall 2b.

  The energy absorber 7 may be disposed inside the rear end portion of the side sill 1, or may be disposed inside both the front end portion and the rear end portion of the side sill 1. You may arrange | position inside the site | parts other than a rear-end part. The energy absorber 7 disposed and held inside the rear end portion of the side sill 1 has a rear wheel (not shown) that moves forward in contact with the rear end portion of the side sill 1 at the time of rear collision of the vehicle. It functions to absorb energy by being crushed between the rear wheel and the side sill 1.

  The energy absorber 7 is formed of a metal material or a resin material. As shown in FIGS. 5 and 6, the energy absorber 7 includes a cylindrical structure (crash box) 8 extending in the vehicle front-rear direction and a partition wall 9 that partitions the inside of the cylindrical structure 8 in the vehicle front-rear direction. And have. In the present embodiment, the partition wall 9 is provided on the rear end side with respect to the intermediate portion in the longitudinal direction of the tubular structure 8. The partition wall portion 9 is not limited to the present embodiment, and may be provided between the front end and the rear end of the tubular structure 8 in the vehicle front-rear direction.

  The tubular structure 8 is composed of a honeycomb structure formed such that a plurality of hollow hexagonal columns are arranged in parallel. The tubular structure 8 is not limited to a honeycomb structure as long as it has a relatively high rigidity against compression in the vertical direction and can exhibit a function as a so-called crash box. On the other hand, the partition wall 9 is airtight to prevent transmission of sound to the inside of the cylindrical structure 8 and the side sill 1 and prevents water from entering the inside of the cylindrical structure 8 and the side sill 1. In order to maintain watertightness, the cylindrical structure 8 is provided. The partition wall 9 may be provided integrally with the cylindrical structure 8 or may be provided separately from the cylindrical structure 8.

  As shown in FIGS. 1 to 4, a jackup member 10 constituting a jackup point of a vehicle is joined to a lower portion of the side sill 1 positioned below the energy absorber 7. In the present embodiment, the jackup member 10 is disposed immediately below the partition wall 9 of the energy absorber 7. Further, a cushioning material 11 is interposed between the lower wall portion of the side sill 1 and the jackup member 10. The jack-up member 10 and the cushioning material 11 are formed with insertion holes 12 and 13 for inserting bolts 14 to be described later.

  The jackup member 10 is made of a metal material or a resin material. As shown in FIGS. 2 to 4, the jack-up member 10 has a jack-up portion 10 a for engaging the jack when jacking up the vehicle, and an insertion hole 12 for inserting a bolt 14 as a fastening member. And a flange portion 10b. In the present embodiment, the jack-up member 10 is joined to the lower portion of the side sill 1 via a bolt 14. Specifically, the bolt 14 is inserted through the insertion hole 12 of the jack-up member 10 and the insertion hole 13 of the shock absorber 11 and penetrates the lower wall portion of the side sill 1. In addition, the fastening member used for joining the side sill 1 and the jackup member 10 is not limited to the bolt 14, For example, a pin, a rivet, etc. may be used.

  Below, the effect by this embodiment is demonstrated.

  (1) The vehicle body structure according to the present embodiment is joined to the energy absorber 7 disposed inside the front end portion of the side sill 1 and the lower portion of the side sill 1 located below the energy absorber 7 to jack up the vehicle. A jack-up member 10 constituting a point.

  The energy absorber 7 is disposed inside the front end portion of the side sill 1, and the jack-up member 10 is joined to the lower portion of the side sill 1 located below the energy absorber 7, thereby jacking up the side sill 1 made of fiber reinforced resin. The joint portion with the member 10 can be reinforced. For this reason, it becomes possible to support the load at the time of jackup by the side sill 1. Therefore, according to the vehicle body structure according to the present embodiment, it is not necessary to provide a metal frame, a bracket, or the like, and an increase in the weight and manufacturing cost of the vehicle can be suppressed.

  (2) The energy absorber 7 includes a cylindrical structure 8 and a partition wall 9 that partitions the inside of the cylindrical structure 8.

  Since the energy absorber 7 has the partition wall portion 9 that partitions the inside of the cylindrical structure 8, the rigidity against compression in the vertical direction of the energy absorber 7 is increased, and the jackup member 10 in the side sill 1 made of fiber reinforced resin It is possible to further reinforce the joint portion. For this reason, the side sill 1 can support a larger load when jacking up.

  (3) The vehicle body structure according to the present embodiment includes a pillar 2 connected to the upper portion of the side sill 1 and extending in the vertical direction. The energy absorber 7 extends in the vehicle front-rear direction from below the front wall 2a of the pillar 2 to below the rear wall 2b.

  Since the energy absorber 7 extends in the vehicle front-rear direction from below the front wall portion 2a of the pillar 2 to below the rear wall portion 2b, the load at the time of jack-up is transferred from the energy absorber 7 to the pillar 2. Can be communicated. For this reason, the side sill 1 can support a larger load when jacking up.

[Second Embodiment]
A vehicle body structure according to the second embodiment will be described with reference to FIG. In FIG. 7, the same members as those in FIGS. 1 to 6 are denoted by the same reference numerals, and redundant description is omitted in the following description.

  In the vehicle body structure according to the second embodiment, as shown in FIG. 7, a member to be fastened (collar 21) that holds a fastening member (bolt 14) is embedded under the energy absorber 7. The collar 21 is provided with a bolt hole 22 for fastening the bolt 14. The bolt 14 is fastened to the collar 21 through the lower wall portion of the side sill 1. In the vehicle body structure according to the second embodiment, a plurality of the collars 21 are embedded below the energy absorber 7, and one of the plurality of collars 21 is the back surface of the partition wall 9 of the energy absorber 7. It is made to contact.

  Below, the effect by 2nd Embodiment is demonstrated.

  In the vehicle body structure according to the second embodiment, a to-be-fastened member (collar 21) that holds a fastening member (bolt 14) is embedded under the energy absorber 7, and the bolt 14 passes through the lower wall portion of the side sill 1. And fastened to the collar 21.

  By appropriately changing the number, position, size, etc. of the collar 21, the collision reaction force of the energy absorber 7 accompanying the increase in the weight of the vehicle can be adjusted, and the amount of energy absorbed by the energy absorber 7 can be adjusted. Is possible.

[Third Embodiment]
A vehicle body structure according to the third embodiment will be described with reference to FIG. In FIG. 8, the same members as those in FIGS. 1 to 6 are denoted by the same reference numerals, and redundant description is omitted in the following description.

  In the vehicle body structure according to the third embodiment, as shown in FIG. 8, a convex portion 31 protruding upward is provided on the upper portion of the jackup member 10, and the convex portion 31 is engaged on the lower portion of the energy absorber 7. A recess 32 that can be mated is provided. And the jackup member 10 is joined to the lower part of the side sill 1 in the state which made the convex part 31 of the jackup member 10 engage with the recessed part 32 of the energy absorber 7. FIG. The convex portion 31 may be provided integrally with the jackup member 10 or may be provided separately from the jackup member 10. Further, in the vehicle body structure according to the third embodiment, the convex portion 31 is disposed in the middle portion of the jackup member 10 in the vehicle front-rear direction, and this convex portion 31 is disposed on the back surface of the partition wall portion 9 of the energy absorber 7. It is made to contact.

  Below, the effect by 3rd Embodiment is demonstrated.

  In the vehicle body structure according to the third embodiment, a convex portion 31 protruding upward is provided on the upper portion of the jackup member 10, and a concave portion 32 that can engage the convex portion 31 is provided on the lower portion of the energy absorber 7. Then, the jackup member 10 is joined to the lower portion of the side sill 1 with the convex portion 31 engaged with the concave portion 32.

  By appropriately changing the quantity, position, size, and the like of the convex portion 31 and the concave portion 32, the collision reaction force of the energy absorber 7 accompanying the increase in the weight of the vehicle can be adjusted, and the energy by the energy absorber 7 can be adjusted. The amount of absorption can be adjusted.

  By the way, the vehicle body structure of the present invention has been described by taking the above-described embodiment as an example. However, the present invention is not limited to this embodiment, and various other embodiments can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Side sill 2 Pillar 2a Front wall part 2b Rear wall part 7 Energy absorber 8 Cylindrical structure 9 Partition part 10 Jackup member 14 Bolt (fastening member)
21 Color (member to be fastened)
31 Convex part 32 Concave part

Claims (5)

A side sill made of fiber reinforced resin located in the lower part on both sides in the vehicle width direction of the vehicle and extending in the vehicle front-rear direction;
An energy absorber that is disposed inside the front end portion of the side sill and absorbs energy with respect to an input load from the tire to the side sill at the time of a frontal collision;
A jack-up member joined to a lower part of the side sill located below the energy absorber and constituting a jack-up point of the vehicle , and
A body to be fastened that holds a fastening member is embedded under the energy absorber, and the fastening member is fastened to the fastened member by passing through a lower wall portion of the side sill. . A side sill made of fiber reinforced resin located in the lower part on both sides in the vehicle width direction of the vehicle and extending in the vehicle front-rear direction;
An energy absorber that is disposed inside the front end portion of the side sill and absorbs energy with respect to an input load from the tire to the side sill at the time of a frontal collision;
A jack-up member joined to a lower part of the side sill located below the energy absorber and constituting a jack-up point of the vehicle, and
A state in which a convex portion protruding upward is provided on the upper portion of the jack-up member, a concave portion capable of engaging the convex portion is provided in a lower portion of the energy absorber, and the convex portion is engaged with the concave portion. The jack-up member is joined to the lower part of the side sill
Body structure characterized by that. A side sill made of fiber reinforced resin located in the lower part on both sides in the vehicle width direction of the vehicle and extending in the vehicle front-rear direction;
An energy absorber that is disposed inside the front end portion of the side sill and absorbs energy with respect to an input load from the tire to the side sill at the time of a frontal collision;
A jack-up member joined to a lower part of the side sill located below the energy absorber and constituting a jack-up point of the vehicle, and
The energy absorber includes a cylindrical structure and a partition wall partitioning the inside of the cylindrical structure,
The jackup member is disposed immediately below the partition wall.
Body structure characterized by that. Wherein the energy absorber, vehicle body structure according to claim 1 or 2, characterized in that it has a tubular structure, and a partition wall for partitioning an interior of the tubular structure. A pillar connected to the upper part of the side sill and extending in the vertical direction,
Wherein the energy absorber according to any one of claims 1 to 4, characterized in that extending in the vehicle longitudinal direction across the lower rear wall portion from below the front wall portion of the pillar Body structure.

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