JP2004314663A - Car body structure - Google Patents

Car body structure Download PDF

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Publication number
JP2004314663A
JP2004314663A JP2003107495A JP2003107495A JP2004314663A JP 2004314663 A JP2004314663 A JP 2004314663A JP 2003107495 A JP2003107495 A JP 2003107495A JP 2003107495 A JP2003107495 A JP 2003107495A JP 2004314663 A JP2004314663 A JP 2004314663A
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JP
Japan
Prior art keywords
vehicle
collision
reinforcement
floor
floor under
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003107495A
Other languages
Japanese (ja)
Inventor
Teruyuki Minami
輝之 南
Original Assignee
Toyota Motor Corp
トヨタ自動車株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp, トヨタ自動車株式会社 filed Critical Toyota Motor Corp
Priority to JP2003107495A priority Critical patent/JP2004314663A/en
Publication of JP2004314663A publication Critical patent/JP2004314663A/en
Pending legal-status Critical Current

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Abstract

An object of the present invention is to effectively disperse a collision load at the time of a vehicle offset frontal collision.
A rear portion of a kick portion of a front side member (12, 14) is bent inward in the vehicle width direction, and extends from the front outside in the vehicle width direction toward the rear inside in the vehicle width direction. 12C and 14C. The rear ends 12D and 14D of the front floor under reinforcements 12C and 14C are connected to an outer portion in the vehicle width direction of a portion 22D near the front side of the rear end 22C of the tunnel reinforcement 22. The rear end 22C of the tunnel reinforcement 22 is connected to a front wall 24A of a floor cross member 24 extending along the vehicle width direction.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle body structure, and more particularly to a vehicle body structure of a vehicle such as an automobile having a pair of left and right side members extending in a vehicle front-rear direction.
[0002]
[Prior art]
Conventionally, as a vehicle body structure of a vehicle such as an automobile having a pair of left and right side members extending in the vehicle longitudinal direction, in order to bring the side bending point of the side member at the time of a vehicle offset front collision to the front of the body mount, There is known a configuration in which an end portion of a reinforcement is disposed at a portion where the vehicle is to be horizontally folded to form a starting point of the lateral bending to absorb energy at the time of a vehicle offset front collision (for example, see Non-Patent Document 1). ).
[0003]
[Non-patent document 1]
Invention Association Open Technical Bulletin, Official Skill Number 2000-3871
[0004]
[Problems to be solved by the invention]
However, in this configuration, at the time of a vehicle offset front collision, only the collision side member of the pair of left and right side members receives the collision load. As a result, the collision load is less likely to be distributed to other parts than the collision side member, and the deformation of the vehicle body increases.
[0005]
An object of the present invention is to provide a vehicle body structure capable of effectively dispersing a collision load at the time of a vehicle offset front collision in consideration of the above fact.
[0006]
[Means for Solving the Problems]
In the vehicle body structure according to the first aspect of the present invention, the rear portion of the kick portion of the pair of left and right side members extending in the front-rear direction of the vehicle body is bent inward in the vehicle width direction, and is connected to the vicinity of the junction between the tunnel portion and the cross member. It is characterized by having done.
[0007]
Therefore, at the time of the vehicle offset front collision, the collision load received by the side member on the collision side of the pair of left and right side members is bent inward in the vehicle width direction and connected to the vicinity of the joint between the tunnel portion and the cross member. Thereby, it can be distributed to the tunnel portion and the cross member, and can also be distributed to the opposite side member via the cross member. As a result, the collision load can be effectively dispersed at the time of the vehicle offset front collision.
[0008]
According to a second aspect of the present invention, in the vehicle body structure according to the first aspect, a front end portion of a rear floor under reinforcement is connected to an outer side in a vehicle width direction of a connecting portion between the tunnel portion and the cross member.
[0009]
Therefore, in addition to the contents described in claim 1, by connecting the front end of the rear floor under reinforcement to the vehicle width direction outside of the connecting portion between the tunnel portion and the cross member, the connecting portion between the tunnel portion and the cross member is formed. The support rigidity from behind the vehicle body decreases. As a result, the load from the side member can be received by the bending of the cross member toward the rear of the vehicle body. Therefore, the axial load and the vertical bending moment acting on the kick portion of the side member can be reduced.
[0010]
In the vehicle body structure according to the third aspect of the present invention, the rear portion of the kick portion of the pair of left and right side members extending in the vehicle front-rear direction is bent inward in the vehicle width direction, and the front end of the rear floor under reinforcement on the opposite side in the vehicle width direction. It is characterized in that it is connected near the part.
[0011]
Therefore, at the time of a vehicle offset front collision, a kick in which the collision load received by the side member on the collision side of the pair of left and right side members is bent inward in the vehicle width direction and connected near the front end of the rear floor under reinforcement on the opposite side in the vehicle width direction. The rear portion can transmit the force to the rear floor under reinforcement on the opposite side in the vehicle width direction. As a result, the collision load can be effectively dispersed at the time of the vehicle offset front collision.
[0012]
According to a fourth aspect of the present invention, in the vehicle body structure according to the third aspect, a cross member extending to the left and right rockers is provided at a joint between the side member and the rear floor under reinforcement.
[0013]
Therefore, in addition to the contents described in claim 3, the load received by the collision side rocker at the time of the vehicle side collision can be transmitted to the opposite side and the front side of the vehicle body via the cross member and the side member. Therefore, the load can be dispersed even at the time of a vehicle side collision.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
A first embodiment of a vehicle body structure according to the present invention will be described with reference to FIGS.
[0015]
In the drawings, an arrow FR indicates a forward direction of the vehicle body, an arrow IN indicates an inward direction of the vehicle width, and an arrow UP indicates an upward direction of the vehicle body.
[0016]
As shown in FIG. 1, front side members 12 and 14 as a pair of left and right side members extending in the vehicle front-rear direction are disposed at lower portions on both sides in the vehicle width direction at a front portion of the vehicle body 10. A bumper reinforcement 16 is erected at the front ends 12A and 14A of the front side members 12 and 14.
[0017]
As shown in FIG. 2, the kick portions 12B, 14B of the front side members 12, 14 are inclined from the upper front side of the vehicle body to the lower rear side of the vehicle body in a side view.
[0018]
As shown in FIG. 1, portions of the front side members 12 and 14 behind the kick portion are bent inward in the vehicle width direction, and extend from the front outside in the vehicle width direction toward the rear inside in the vehicle width direction. Under reinforcements 12C and 14C are provided.
[0019]
As shown in FIG. 3, the cross-sectional shape of the front side member 14 when viewed from the vehicle front-rear direction is a hat shape with the opening directed upward from the vehicle body, and the flange is joined to the lower surface of the front floor panel 20 to close the cross-section. Forming the structure. Further, a tunnel reinforcement 22 is provided on the lower surface side of the front floor panel 20 on the outer side in the vehicle width direction of the tunnel portion 20A along the vehicle longitudinal direction. The cross-sectional shape of the tunnel reinforcement 22 when viewed from the vehicle front-rear direction is a hat shape with an opening directed upward from the vehicle body, and a flange is joined to the lower surface of the front floor panel 20 to form a closed cross-sectional structure.
[0020]
The front portion 22A of the tunnel reinforcement 22 is inclined from the inside rearward in the vehicle width direction to the front outside in the vehicle width direction, and the front end portion 22B is connected to the vehicle width direction inside portion of the kick portion 14B of the front side member 14. ing. The rear end portion 22C of the tunnel reinforcement 22 is connected to a front wall portion 24A of a floor cross member 24 extending along the vehicle width direction.
[0021]
The cross-sectional shape of the floor cross member 24 as viewed from the vehicle width direction is a hat shape with an opening directed upward from the vehicle body, and a flange is joined to the lower surface of the front floor panel 20 to form a closed cross-sectional structure. An outer end 24B of the floor cross member 24 in the vehicle width direction is connected to a center pillar standing portion 28A of the rocker 28.
[0022]
A rear end portion 14D of the front floor under reinforcement 14C is connected to an outer portion in the vehicle width direction of a portion 22D near the front side of the rear end portion 22C of the tunnel reinforcement 22. An outer torque box 30 in which a vehicle width direction inside portion of the front pillar standing portion 28B of the rocker 28 and a vehicle width direction outside portion of the kick portion 14B of the front side member 14 form a closed cross-sectional structure with a dash panel. The front portions 22A of the left and right tunnel reinforcements 22 are connected to each other by a dash cross member 32 forming a closed cross-sectional structure with a dash panel.
[0023]
A front end of a rear floor under reinforcement 36 extending in the vehicle front-rear direction is provided on a rear side of a portion 24D of the floor cross member 24 that is offset outward in the vehicle width direction with respect to a coupling portion 24C with the tunnel reinforcement 22. The part 36A is connected. The cross-sectional shape of the rear floor under reinforcement 36 as viewed from the vehicle front-rear direction is a hat shape with an opening directed upward from the vehicle body, and a flange is joined to the lower surface of the front floor panel 20 to form a closed cross-sectional structure. .
[0024]
Note that the left side of the vehicle body, not shown in FIG. 3, has the same configuration as the right side of the vehicle body shown in FIG.
[0025]
Next, the operation of the present embodiment will be described.
[0026]
In the vehicle body structure of the present embodiment, at the time of a vehicle offset front collision, a collision load (arrow shown in FIG. 1) received by a front side member on the collision side of the pair of left and right front side members 12, 14, for example, a front side member 14 on the right side of the vehicle body. F) is converted into an axial force F in the direction of the center of gravity P of the vehicle body by the front floor under reinforcement 14C extending from the front outside in the vehicle width direction toward the rear inside in the vehicle width direction. This can be reliably transmitted to the rear floor under reinforcement 36 on the collision side. Further, the load is also transmitted to the collision side rocker 28 via the outer torque box 30, and the load sharing of the collision side rocker 28 also increases.
[0027]
Further, in the present embodiment, the collision load F received by the front side member on the collision side of the pair of left and right front side members 12, 14, for example, the front side member 14 on the right side of the vehicle body during the vehicle offset front collision, By the front floor under reinforcement 14C extending from the outside front toward the inside in the vehicle width direction, by applying a force F in the axial direction toward the center of gravity P of the vehicle body, the center of gravity P around which the vehicle body is to be rotated is set. Can be suppressed.
[0028]
As a result, the frame members such as the rockers 28 disposed along the front-rear direction of the vehicle body can reliably receive the load in the axial force direction. For this reason, the energy absorption efficiency of the skeletal member is improved, and the amount of vehicle body deformation at the time of a collision can be reduced.
[0029]
Further, in the present embodiment, the rigidity of the front floor under reinforcements 12C, 14C is reduced because the front floor under reinforcements 12C, 14C behind the kick portions of the front side members 12, 14 are bent inward in the vehicle width direction. The front floor under reinforcements 12C and 14C are easily elastically deformed downward in the vehicle body (in the direction of arrow A in FIG. 2). As a result, the amount of deformation of the bend angle θ in the side view of the kick portions 12B, 14B of the front side members 12, 14 becomes smaller relative to the input load F. For this reason, the vertical bending moment M2 of the lower part (rear part S) of the kicks 12B and 14B due to the input load F can be reduced, and the reinforcement of the lower parts of the kicks 12B and 14B can be reduced accordingly, and the weight of the vehicle body can be reduced. It becomes.
[0030]
That is, in the present embodiment, the load difference generated between the left and right front side members 12, 14 can be corrected at the time of the vehicle offset front collision, and the vehicle body due to the shearing force generated between the left and right front side members 12, 14 can be corrected. Shear deformation can be suppressed. In addition, since the load can be effectively distributed to other frame members such as the rocker 28, the axial force and moment at the lower part of the kick portions 12B and 14B where the load is concentrated can be reduced, and the weight of the vehicle body can be reduced. Become.
[0031]
Further, in the present embodiment, the front end portion 36A of the rear floor under reinforcement 36 is connected to the rear side portion 24D of the floor cross member 24 that is offset to the outside in the vehicle width direction with respect to the coupling portion 24C with the tunnel reinforcement 22. ing. As a result, the joint 24C of the floor cross member 24 with the tunnel reinforcement 22 is easily bent and deformed rearward of the vehicle body, and the rigidity of the joint 24C at the rear of the vehicle body is reduced, and the load from the front side members 12 and 14 is reduced. Can be received. For this reason, the axial forces and moments at the lower portions of the kick portions 12B and 14B where the loads are concentrated can be further reduced, and the weight of the vehicle body can be further reduced.
[0032]
In the present embodiment, the rear end portion 12D of the front floor under reinforcement 12C is connected to the outer side in the vehicle width direction of the front portion 22D of the rear end portion 22C of the tunnel reinforcement 22 in the vehicle reinforcement. As shown in FIG. 4, the rear end portion 12D of the front floor under reinforcement 12C is directly connected to the front wall portion 24E of the connecting portion 24C of the floor cross member 24 with the tunnel reinforcement 22 on the outer side in the vehicle width direction 24E. May be.
[0033]
Next, a second embodiment of the vehicle body structure of the present invention will be described with reference to FIGS.
[0034]
The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0035]
As shown in FIG. 5, in this embodiment, the rear end 12D of the front floor under reinforcement 12C on the left side of the vehicle body is connected to the front end 36A of the rear floor under reinforcement 36 on the right side of the vehicle body. Similarly, a rear end portion 14D of the front floor under reinforcement 14C on the right side of the vehicle body is connected to a front end portion 36A of the rear floor under reinforcement 36 on the left side of the vehicle body, and the left and right front floor under reinforcements 12C and 14C are respectively provided. At the center part in the front-rear direction, crosses the X shape in plan view.
[0036]
As shown in FIG. 6, at the intersection of the left and right front floor under reinforcements 12C and 14C, in the present embodiment, the closed cross section of the front floor under reinforcement 14C on the right side of the vehicle body has priority. Also, the front floor under reinforcement 12C on the other side (the left side of the vehicle body) is separated by the front floor under reinforcement 14C on the right side of the vehicle body, and the front floor under reinforcement 14C is included in a closed cross section of the front floor under reinforcement 14C on the right side of the vehicle body. Bulkheads 40 are provided to match the positions of both side walls 12E of the ment 12C.
[0037]
As shown in FIG. 5, a connection portion between a rear end portion 12D of the front floor under reinforcement 12C and a front end portion 36A of the rear floor under reinforcement 36 on the right side of the vehicle body, and a rear end portion 14D of the front floor under reinforcement 14C and the vehicle body. The floor cross member 24 is divided into three parts at the connecting portion of the left rear floor under reinforcement 36 with the front end 36A.
[0038]
As shown in FIG. 7, at the connecting portion between the rear end portion 12D of the front floor under reinforcement 12C and the front end portion 36A of the rear floor under reinforcement 36 on the right side of the vehicle body, there is a closed section of the front floor under reinforcement 12C. , Bulkheads 42 are provided to match the positions of both side walls 24F of the floor cross member 24. The same configuration is applied to the connection between the rear end 14D of the front floor under reinforcement 14C and the front end 36A of the rear floor under reinforcement 36 on the left side of the vehicle body.
[0039]
Therefore, as shown in FIG. 5, the truss having a triangular shape in a plan view is formed by a portion of the left and right front floor under reinforcements 12 </ b> C, 14 </ b> C on the rear side of the vehicle body from the intersection and the center portion of the floor cross member 24 in the vehicle width direction. A structure is formed.
[0040]
Next, the operation of the present embodiment will be described.
[0041]
In the present embodiment, during a vehicle offset front collision, the collision load F1 received by the front side member on the collision side of the pair of left and right front side members 12, 14, for example, the collision load F1 received by the front side member 14 on the right side of the vehicle body is subjected to front floor under reinforcement. 14C enables direct transmission to the rear floor under reinforcement 36 on the anti-collision side.
[0042]
At the same time, at the center of the vehicle body where most of the load at the time of vehicle offset frontal collision is transmitted, the portion of the left and right front floor under reinforcements 12C and 14C from the intersection of the vehicle body and the center of the floor cross member 24 in the vehicle width direction. , A truss structure having a triangular shape in a plan view is formed. Therefore, each of the anti-collision side and the collision side is formed by a portion on the rear side of the vehicle body from the intersection of the front floor under reinforcements 12C and 14C which are two sides of the triangle. The load F1 can be distributed to the rear floor under reinforcement 36 and the like. As a result, the load F1 can be dispersed in all directions such as the anti-collision side, the collision side, and the central portion of the vehicle body. Therefore, the reinforcement of the load acting portion of the vehicle body can be reduced, and the weight of the vehicle body can be reduced.
[0043]
That is, in the present embodiment, the load difference generated between the left and right front side members 12, 14 can be corrected at the time of the vehicle offset front collision, and the vehicle body due to the shearing force generated between the left and right front side members 12, 14 can be corrected. Shear deformation can be suppressed. In addition, since the load can be effectively distributed to other frame members such as the rocker 28, the axial force and moment at the lower portion of the kick portions 12C and 14C where the load is concentrated can be reduced, and the weight of the vehicle body can be reduced. Become.
[0044]
Furthermore, in the present embodiment, the front floor under reinforcements 12C and 14C intersecting in the X shape in plan view also with respect to the load F2 entering the floor cross member 24 from the collision side rocker 28 at the time of the vehicle side collision. The load can be dispersed and the load F2 can be transmitted to the front side of the vehicle body. As a result, the load F2 at the time of the vehicle side collision can be received over a wide range of the front part (front body) of the vehicle body.
[0045]
In the above, the present invention has been described in detail with respect to a specific embodiment, but the present invention is not limited to such an embodiment, and various other embodiments are possible within the scope of the present invention. Some will be apparent to those skilled in the art.
[0046]
【The invention's effect】
In the vehicle body structure according to the first aspect of the present invention, the rear portion of the kick portion of the pair of left and right side members extending in the front-rear direction of the vehicle body is bent inward in the vehicle width direction, and is connected to the vicinity of the junction between the tunnel portion and the cross member. Therefore, there is an excellent effect that the collision load can be effectively dispersed at the time of the vehicle offset front collision.
[0047]
According to the second aspect of the present invention, in the vehicle body structure according to the first aspect, the front end of the rear floor under reinforcement is connected to the outside in the vehicle width direction of the connecting portion between the tunnel portion and the cross member. In addition, there is an excellent effect that the axial load and the vertical bending moment acting on the kick portion of the side member can be reduced.
[0048]
In the vehicle body structure according to the third aspect of the present invention, the rear portion of the kick portion of the pair of left and right side members extending in the vehicle front-rear direction is bent inward in the vehicle width direction, and the front end of the rear floor under reinforcement on the opposite side in the vehicle width direction. Since it is connected to the vicinity of the portion, it has an excellent effect that a collision load can be effectively dispersed at the time of a vehicle offset front collision.
[0049]
According to a fourth aspect of the present invention, in the vehicle body structure according to the third aspect, a cross member extending to the left and right rockers is provided at a joint between the side member and the rear floor under reinforcement. Thus, there is an excellent effect that the load can be dispersed even at the time of a vehicle side collision.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing a vehicle body structure according to a first embodiment of the present invention.
FIG. 2 is a schematic side view showing a vehicle body structure according to the first embodiment of the present invention.
FIG. 3 is a perspective view showing the vehicle body structure according to the first embodiment of the present invention, as viewed obliquely from the rear and outside of the vehicle body.
FIG. 4 is a schematic plan view showing a vehicle body structure according to a modification of the first embodiment of the present invention.
FIG. 5 is a schematic plan view showing a vehicle body structure according to a second embodiment of the present invention.
FIG. 6 is a perspective view showing a main part of a vehicle body structure according to a second embodiment of the present invention, as viewed obliquely from the front of the vehicle body.
FIG. 7 is a perspective view showing a main part of a vehicle body structure according to a second embodiment of the present invention, as viewed from an obliquely rear inner side of the vehicle body.
[Explanation of symbols]
10 Auto body 12 Front side member (side member)
12B Kick portion of front side member 12C Front floor under reinforcement (portion behind kick portion of side member)
14 Front side member (side member)
14B Kick portion of front side member 14C Front floor under reinforcement (portion behind kick portion of side member)
Reference Signs List 20 front floor panel 20A front floor panel tunnel portion 22 tunnel reinforcement 24 floor cross member 28 rocker 36 rear floor under reinforcement

Claims (4)

  1. A body structure wherein a portion behind a kick portion of a pair of left and right side members extending in a vehicle front-rear direction is bent inward in a vehicle width direction and connected near a joint between a tunnel portion and a cross member.
  2. 2. The vehicle body structure according to claim 1, wherein a front end portion of a rear floor under reinforcement is connected to an outer side in a vehicle width direction of a connecting portion between the tunnel portion and the cross member.
  3. A body structure in which a rear portion of a kick portion of a pair of left and right side members extending in a vehicle front-rear direction is bent inward in a vehicle width direction and connected to a vicinity of a front end portion of a rear floor under reinforcement on a side opposite to the vehicle width direction. .
  4. 4. The vehicle body structure according to claim 3, wherein a cross member extending to the left and right rockers is provided at a joint between the side member and the rear floor under reinforcement.
JP2003107495A 2003-04-11 2003-04-11 Car body structure Pending JP2004314663A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003107495A JP2004314663A (en) 2003-04-11 2003-04-11 Car body structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003107495A JP2004314663A (en) 2003-04-11 2003-04-11 Car body structure

Publications (1)

Publication Number Publication Date
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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007216843A (en) * 2006-02-16 2007-08-30 Honda Motor Co Ltd Vehicle body lower part structure
JP2008056115A (en) * 2006-08-31 2008-03-13 Toyota Motor Corp Structure of floor portion in vehicle
JP2009101949A (en) * 2007-10-25 2009-05-14 Honda Motor Co Ltd Vehicle body structure
CN102975770A (en) * 2012-11-27 2013-03-20 天津博信汽车零部件有限公司 Automobile floor beam and automobile floor with same
JP2014101063A (en) * 2012-11-21 2014-06-05 Press Kogyo Co Ltd Collision safety structure of vehicle body frame

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007216843A (en) * 2006-02-16 2007-08-30 Honda Motor Co Ltd Vehicle body lower part structure
JP2008056115A (en) * 2006-08-31 2008-03-13 Toyota Motor Corp Structure of floor portion in vehicle
JP2009101949A (en) * 2007-10-25 2009-05-14 Honda Motor Co Ltd Vehicle body structure
JP2014101063A (en) * 2012-11-21 2014-06-05 Press Kogyo Co Ltd Collision safety structure of vehicle body frame
CN102975770A (en) * 2012-11-27 2013-03-20 天津博信汽车零部件有限公司 Automobile floor beam and automobile floor with same

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