WO2009116323A1 - Structure avant de corps de véhicule - Google Patents

Structure avant de corps de véhicule Download PDF

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Publication number
WO2009116323A1
WO2009116323A1 PCT/JP2009/051458 JP2009051458W WO2009116323A1 WO 2009116323 A1 WO2009116323 A1 WO 2009116323A1 JP 2009051458 W JP2009051458 W JP 2009051458W WO 2009116323 A1 WO2009116323 A1 WO 2009116323A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
suspension member
frame side
vehicle body
frame
Prior art date
Application number
PCT/JP2009/051458
Other languages
English (en)
Japanese (ja)
Inventor
和幸 橋本
公人 小柳
崇 大國
Original Assignee
トヨタ車体株式会社
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 トヨタ車体株式会社 filed Critical トヨタ車体株式会社
Publication of WO2009116323A1 publication Critical patent/WO2009116323A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
    • B62D21/152—Front or rear frames
    • B62D21/155—Sub-frames or underguards

Definitions

  • the present invention is formed in a square frame shape by side members extending in the vehicle front-rear direction on both sides in the vehicle width direction and front, rear, left and right frame sides, and four corners are connected to the left and right side members from below.
  • the present invention relates to a vehicle body front structure.
  • a suspension member 110 that supports the front suspension 105 includes a substantially U-shaped main body part 112 that is open on the rear side, and the main body part 112. It is formed in a square frame shape by the connecting portion 113 that connects the rear end open portions.
  • the main body 112 of the suspension member 110 is connected to the left and right side members 102 from below by left and right front end vertical portions 112s.
  • the left and right rear ends of the main body 112 of the suspension member 110 are fastened to the connecting part 113 by bolts B1 and are also fastened to the lower cross member (not shown) supported by the side members 102 through the long holes 112h. Has been. Further, the left and right rear ends of the connecting portion 113 of the suspension member 110 are fixed to a floor panel (not shown) supported by the side member 102 via a notch 113c.
  • the main body portion 112 of the suspension member 110 moves rearward by the length of the long hole 112h, and the connecting portion 113 comes off from the bolt B3 on the floor panel side by the function of the notch 113c. For this reason, the main body portion 112 and the connecting portion 113 of the suspension member 110 move rearward without being significantly deformed by the collision load. That is, the collision load is absorbed when the side member 102 is crushed in the vehicle front-rear direction, and is hardly absorbed at the suspension member 110 portion.
  • the deformation amount (collapse amount) of the side member 102 in the vehicle front-rear direction increases.
  • the amount of rearward movement of the suspension member 110 connected to the side member 102 also increases.
  • the present invention has been made to solve the above-described problems, and the problem to be solved by the present invention is that both the side member and the suspension member are deformed when subjected to a collision load. In addition, the deformation amount (crush amount) of the side member in the vehicle front-rear direction is reduced, and the rearward movement of the suspension member is suppressed.
  • 1st invention is formed in the square frame shape by the side member extended in the vehicle front-back direction in the vehicle width direction both sides, and the frame sides of the front, back, left and right, and the four corners are connected to the left and right side members from below.
  • a suspension member having a structure, a lower arm for supporting a front wheel having a strength greater than that of a frame side portion of the suspension member and connected to a left side frame side portion and a front end portion and a rear end portion of the right side frame side portion, respectively.
  • the front wheel support lower arm receives a collision load from the front wheel side and moves rearward when the front wheel support lower arm moves rearward.
  • the rear end of the left or right frame side portion rotates around the rear connection portion between the suspension member and the side member.
  • the rear frame side portion is bent by moving rearward, and the bending of the rear side frame side portion promotes the rotation of the rear end portion of the left side or right side frame portion, and the left side or right side frame thereof.
  • the side portion is bent so as to protrude inward in the vehicle width direction.
  • the front wheel support lower arm when the front wheel support lower arm receives a collision load from the front wheel side and moves rearward, the front wheel support lower arm moves the rear end of the left or right frame side of the suspension member to the rear inward in the vehicle width direction. Press. Accordingly, the rear frame side portion is bent by moving the rear end portion of the left or right frame side portion of the suspension member about the rear connection portion of the suspension member and the side member while moving backward. . Then, the turning of the rear end of the left or right frame side is facilitated by the bending of the rear frame side, and the left or right frame side is bent so as to protrude inward in the vehicle width direction.
  • the left or right frame side of the suspension member is bent so as to protrude inward in the vehicle width direction, so that the length of the suspension member in the vehicle front-rear direction is increased. Dimensions are reduced. For this reason, the side member is crushed in the vehicle front-rear direction by a reduction in the length of the suspension member between the front and rear connecting portions of the side member and the suspension member. In this way, between the connecting portions before and after the side member and the suspension member, both the side member and the suspension member are deformed by receiving a collision load, so that the collision load can be absorbed by both the side member and the suspension member.
  • the rear frame side portion of the suspension member is provided with the fragile portion configured to have low bending strength. Therefore, when the front wheel support lower arm receives a collision load from the front wheel side and moves rearward, the rear frame side portion of the suspension member is surely bent.
  • the rear frame side portion of the suspension member includes a hollow closed cross-sectional left and right end portion formed by joining a plurality of panels, and a pipe portion connecting the left and right end portions.
  • the bending strength is lower than that of the left and right end portions so that the pipe portion functions as the fragile portion.
  • the rear frame side portion of the suspension member is formed into a hollow closed cross-section by joining a plurality of panels, and the plurality of recesses formed in the circumferential direction of the panels
  • the vulnerable part is configured. For this reason, it becomes possible to press-mold a weak part, and formation of a weak part becomes easy.
  • the collision load of the vehicle can be absorbed by both the side member and the suspension member between the front and rear connecting portions of the side member and the suspension member, the deformation (collapse) of the side member can be reduced and the suspension member can be reduced. Can be prevented from moving backward.
  • FIGS. 1 to 6 the vehicle body front part structure according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 6.
  • front and rear, right and left and up and down in the figure correspond to front and rear, right and left and up and down of the vehicle.
  • a side member 10 (see a two-dot chain line) that extends in the vehicle front-rear direction on both sides in the vehicle width direction is provided at the front portion of the vehicle body 1.
  • a front cross member 12 (see a two-dot chain line) extending in the vehicle width direction is passed between the front end portions of the left and right side members 10.
  • a suspension member 20 formed in a square frame shape is disposed substantially horizontally at the rear position of the front cross member 12, and the suspension member 20 is supported from above by the left and right side members 10 (see FIG. 2).
  • the suspension member 20 is connected to lower arms 30 constituting left and right front suspensions via front and rear connecting portions 31 and 32.
  • a support member 2s (see FIG. 1) of a spindle (not shown) is supported by a tip support portion 34 of the lower arm 30 and a shock absorber (not shown) of the front suspension.
  • a hub 2 of a front wheel Tf is rotatably mounted on the spindle.
  • the suspension member 20 is a member that supports the left and right front suspensions (lower arm 30) and the front wheel Tf, and is formed in a square frame shape by front, rear, left and right frame sides 22, 25, 23, and 24 as shown in FIG. Has been.
  • the front frame side 22, the left and right frame sides 23 and 24, and the both ends 25e of the rear frame side 25 are composed of an upper panel 20u and a lower panel (not shown) with each other flange (not shown). By being joined, a hollow closed cross section is formed. And the circular pipe part 25p extended in a vehicle width direction is passed between the both ends 25e of the rear side frame side part 25. As shown in FIG.
  • the pipe portion 25p has a tube wall thickness dimension and a tube outer diameter dimension so that the bending strength is lower than both end portions 25e of the rear frame side portion 25. That is, the pipe portion 25p is configured to have a low bending strength in a state where the strength in the axial direction is ensured. For this reason, when a load in the bending direction is applied to the rear frame side portion 25, the rear frame side portion 25 bends at the boundary position between the both end portions 25e and the pipe portion 25p. Therefore, the pipe part 25p functions as a weak part of the present invention.
  • the left and right frame sides 23 and 24 of the suspension member 20 are erected with support columns 26 at the front end positions.
  • front joint flanges 26 f configured to project outward in the vehicle width direction are provided at the upper ends of the left and right support columns 26.
  • the front joint flanges 26f of the left and right support columns 26 are connected to the lower end surfaces of the left and right side members 10 by bolts B1, respectively.
  • the left and right frame sides 23 and 24 of the suspension member 20 are provided with rear joint flanges 27 at the rear end positions so as to project outward in the vehicle width direction. As shown in FIG.
  • the left and right rear joint flanges 27 are connected to the left and right support bases 16 projecting from the lower side of the side member 10 by bolts B ⁇ b> 2.
  • the height dimension of the left and right support columns 26 and the height dimension of the left and right support bases 16 are set so that the front, rear, left and right frame sides 22, 25, 23, 24 of the suspension member 20 are substantially horizontal. Is set. That is, the suspension member 20 has four corners connected to the left and right side members 10 from below, and the bolts B1, B2, etc. correspond to the front and rear connecting portions between the side member 10 and the suspension member 20 in the present invention. To do.
  • the lower arm 30 is a member that constitutes a front suspension, and is formed in, for example, a substantially ⁇ shape (a gate shape (Rosiya character)) as shown in FIG.
  • the lower arm 30 is formed with a front connecting portion 31 at a central projecting portion, a rear connecting portion 32 at a proximal end portion, and a distal end supporting portion 34 at a distal end portion projecting laterally. Then, the imaginary straight line connecting the front connecting portion 31 and the rear connecting portion 32 of the lower arm 30 is substantially perpendicular to the virtual straight line connecting the front connecting portion 31 and the tip support portion 34 as shown in FIG.
  • the shape of the lower arm 30 is set.
  • the connecting portion 31 on the front side of the lower arm 30 is connected to the front end portions of the left and right frame sides 23 and 24 of the suspension member 20 so as to be vertically rotatable via bushes. Further, the connecting portion 32 on the rear side of the lower arm 30 is connected to the rear end portions of the left and right frame side portions 23 and 24 so as to be horizontally rotatable via bushes. Further, the tip support portion 34 of the lower arm 30 is connected to the spindle support member 2s via a ball joint.
  • the lower arm 30 is configured to have sufficiently higher strength than the frame side portions 22, 25, 23, and 24 of the front and rear, left and right of the suspension member 20. For this reason, when a collision load is applied to the front wheel Tf, the lower arm 30 is hardly deformed, and the frame side portions 23, 24, 25 of the suspension member 20 are deformed.
  • the lower arm 30 rotates counterclockwise around the front connecting portion 31 while moving backward as shown in FIG.
  • the connecting part 32 on the rear side of the lower arm 30 moves rearward in the vehicle width direction (in the direction of the arrow in FIG. 3). That is, the lower arm 30 presses the rear end portion of the left side frame side portion 23 of the suspension member 20 through the connecting portion 32 inward in the vehicle width direction (arrow direction).
  • the lower arm 30 moves backward while rotating counterclockwise about the front connecting portion 31. Therefore, as shown in FIG. 4, the amount of movement Y of the rear connecting portion 32 in the vehicle front-rear direction is the front side.
  • the moving amount X of the connecting portion 31 becomes smaller.
  • the rear joint flange 27 at the rear end position is connected to the side member 10 by the bolt B2.
  • the rear end portion of the left side frame side portion 23 of the suspension member 20 is pressed rearward in the vehicle width direction (arrow direction) by the lower arm 30, the rear end portion of the left side frame side portion 23 is centered on the bolt B2.
  • Receives a force in the right-turn direction (arrow direction) That is, the rear end portion of the left frame side portion 23 of the suspension member 20 moves rearward while rotating to the right.
  • the rear frame side portion 25 of the suspension member 20 receives a bending force from the rear end portion of the left frame side portion 23.
  • the rear frame side portion 25 is composed of both end portions 25e and the pipe portion 25p, and the pipe portion 25p is configured to have a lower bending strength than the both end portions 25e. For this reason, when receiving a bending force from the rear end portion of the left side frame side portion 23, the rear side frame side portion 25 bends at the boundary position between the end portion 25e and the pipe portion 25p. That is, the rear frame side 25 is bent at the boundary position between the end 25e and the pipe 25p, thereby promoting the right rotation of the rear end of the left frame side 23, as shown in FIG. The left side frame side portion 23 is bent so as to protrude inward in the vehicle width direction.
  • the left side frame side portion 23 of the suspension member 20 is bent so as to protrude inward in the vehicle width direction.
  • the length dimension decreases (see FIGS. 1 and 3). Therefore, the side member 10 is crushed in the longitudinal direction of the vehicle by the length dimension reduction (L0-L1) of the suspension member 20 between the front and rear connecting portions B1, B2 between the side member 10 and the suspension member 20.
  • both the side member 10 and the suspension member 20 are deformed by receiving the collision load F. And the suspension member 20 can absorb.
  • the deformation (collapse) of the side member 10 can be made smaller than when the side member 10 is crushed in the vehicle front-rear direction alone as in the prior art. Thereby, the backward movement of the suspension member 20 connected to the side member 10 can also be suppressed.
  • the rear frame side portion 25 of the suspension member 20 includes a left and right end portion 25e having a hollow closed cross section formed by joining a plurality of panels, and a pipe portion 25p that connects the left and right end portions 25e. Therefore, the bending strength is lower than that of the left and right end portions 25e so that the pipe portion 25p functions as a fragile portion. For this reason, when the lower arm 30 receives the collision load F from the front wheel Tf side and moves rearward, the rear frame side portion 25 of the suspension member 20 is reliably bent. Moreover, a required weak part can be comprised in the state which ensured the intensity
  • the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention.
  • the rear frame side portion 25 of the suspension member 20 is composed of a left and right end portion 25e having a hollow closed cross-sectional shape and a pipe portion 25p that connects the left and right end portions 25e.
  • An example is shown in which fragile parts are used. However, as shown in FIGS.
  • the rear frame side 25 of the suspension member 20 is entirely configured in a hollow closed cross-section, and the panel 20u,
  • a configuration is also possible in which a plurality of recesses 125 are formed in the circumferential direction of 20d and the periphery of the recess 125 functions as the fragile portion. Thereby, a weak part can be press-molded and formation of the weak part becomes easy. Further, instead of forming the recess 125, a plurality of holes or the like can be formed, or a folding line can be formed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

L'invention porte sur une structure avant d'un corps de véhicule, dans laquelle l'ampleur de déformation (ampleur d'effondrement) d'un élément latéral dans la direction avant et arrière d'un véhicule est réduite par le fait de permettre à la fois à l'élément latéral et à un élément de suspension d'être déformés lors de la réception d'une charge de collision, et dans laquelle un mouvement vers l'arrière de l'élément de suspension est supprimé. Dans la structure avant d'un corps de véhicule, lorsqu'un bras inférieur (30) pour supporter une roue avant gauche reçoit une charge de collision (F) à partir du côté roue avant (Tf) et se déplace vers l'arrière, le bras inférieur (30) pour supporter une roue avant presse l'extrémité arrière de la partie latérale de cadre gauche (23) d'un élément de suspension (20) vers l'arrière et l'intérieur dans la direction de la largeur du véhicule. Par conséquent, l'extrémité arrière de la partie latérale de cadre gauche (23) se déplace vers l'arrière tout en tournant autour d'une partie de liaison arrière (B2) de l'élément de suspension (20) et d'un élément latéral (10) pour plier ainsi la partie latérale de cadre arrière (25). La flexion de la partie latérale de cadre arrière (25) favorise la rotation de l'extrémité arrière de la partie latérale de cadre gauche (23), et la partie latérale de cadre gauche (23) se plie ainsi pour se projeter vers l'intérieur dans la direction de la largeur du véhicule.
PCT/JP2009/051458 2008-03-18 2009-01-29 Structure avant de corps de véhicule WO2009116323A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-069262 2008-03-18
JP2008069262A JP2009220754A (ja) 2008-03-18 2008-03-18 車両の車体前部構造

Publications (1)

Publication Number Publication Date
WO2009116323A1 true WO2009116323A1 (fr) 2009-09-24

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PCT/JP2009/051458 WO2009116323A1 (fr) 2008-03-18 2009-01-29 Structure avant de corps de véhicule

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JP (1) JP2009220754A (fr)
WO (1) WO2009116323A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011178311A (ja) * 2010-03-02 2011-09-15 Toyota Motor Corp 車体構造

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5329575B2 (ja) 2011-01-26 2013-10-30 本田技研工業株式会社 車両の車体前部
WO2015189910A1 (fr) * 2014-06-10 2015-12-17 日産自動車株式会社 Dispositif de suspension

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003127893A (ja) * 2001-10-29 2003-05-08 Nissan Motor Co Ltd 車体前部構造

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003127893A (ja) * 2001-10-29 2003-05-08 Nissan Motor Co Ltd 車体前部構造

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011178311A (ja) * 2010-03-02 2011-09-15 Toyota Motor Corp 車体構造

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Publication number Publication date
JP2009220754A (ja) 2009-10-01

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