JP2010215101A - Suspension member mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the deformation of a side member toward the direction of the vehicle's width by restraining occurrence of a potential large variation in an angle between the lower surface and side surface of the side member, so as to obtain an outstanding traveling stability. <P>SOLUTION: There are provided a side member 11 extended in the longitudinal direction of a vehicle; a side sill provided at the side member 11 outward of the vehicle, extending in the longitudinal direction of the vehicle; an outrigger provided between the side member 11 and side sill for connecting them; and a suspension member mounting bracket 15 provided on the underside-surface of the side member 11 to support the suspension member. In the side member 11, an angle portion 13C, where the underside-surface 13A on which the suspension member mounting bracket 15 is provided intersects to a side surface 13B extendedly disposed from the side end part of the underside-surface 13A to upward, is provided with a protrusion section 16 projecting to outside from the inside of the side member 11, and the protrusion section 16 and outrigger are connected. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a suspension member mounting structure in which suspension support portions are respectively provided on the lower surfaces of a pair of left and right side members in the vehicle width direction, and suspension members are mounted on these suspension support portions.

  In general, in a vehicle such as an automobile, a pair of side members are arranged along the vehicle front-rear direction on the left and right sides in the vehicle width direction. As a conventional suspension member mounting structure, a suspension member support portion is provided on the lower surface of each side member, and a suspension member is mounted on each suspension member support portion.

  In such a suspension member mounting structure, for example, a plurality of beads are arranged on the side surface of the side member along the vehicle vertical direction and the vehicle front-rear direction so that the side member is crushed and absorbs an impact force at the time of a vehicle frontal collision. It is proposed to form (for example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 5-116646

  By the way, in the above prior art, the side member includes an inner panel having a hat-shaped cross section and a planar outer panel joined to the upper and lower portions of the inner panel, and is formed in a substantially rectangular closed cross section. A suspension member support portion is attached to the lower surface of the side member.

  However, when the vehicle travels, a force in the vehicle width direction (hereinafter referred to as a lateral deflection force) is applied to the suspension due to road surface unevenness or the like, and this lateral deflection force is transmitted to the side member via the suspension member support portion.

  In the prior art, as described above, since the side member is formed in a substantially rectangular closed cross section, the side member is easily deformed in the vehicle width direction when a lateral swing force is applied to the side member. That is, the conventional side member has a substantially rectangular cross section, and has a lower surface and a side surface arranged upward from the side edge of the lower surface, but the angle at which the lower surface and the side surface intersect. When the lateral deflection force is applied, the angle between the lower surface and the side surface changes greatly, and as a result, the side member repeatedly deforms in the vehicle width direction when traveling. It will be. When the side member is repeatedly deformed in the vehicle width direction as described above, traveling stability is deteriorated.

  An object of the present invention is to prevent the side member from being deformed in the vehicle width direction by suppressing a large change in the angle between the lower surface and the side surface of the side member, and to obtain excellent running stability. The object is to provide a suspension member mounting structure.

  In order to solve the above-described problems, a suspension member mounting structure according to the present invention includes a side member extending in the vehicle front-rear direction, a side sill extending in the vehicle front-rear direction outside the vehicle of the side member, An outrigger that is provided between the side member and the side sill and connects the side member and the side sill, and a suspension member support that is provided on the lower surface of the side member and supports the suspension member.

  In the suspension member mounting structure of the present invention, an angle at which a lower surface of the side member provided with the suspension member support portion and a side surface disposed upward from a side end portion of the lower surface intersect. A protruding portion that protrudes from the inside to the outside of the side member is provided on the portion, and the protruding portion and the outrigger are coupled to each other.

  According to the present invention, among the side members, from the inside of the side member to the corner portion where the lower surface provided with the suspension member support portion and the side surface disposed upward from the side end portion of the lower surface intersect. By providing the protruding portion that protrudes outward, the rigidity of the corner portion can be increased. Thereby, when a lateral deflection force is applied, it is possible to suppress a large change in the angle between the lower surface and the side surface of the side member.

  In addition, by combining the protrusion and the outrigger, the lateral runout force applied to the side member can be supported by the side sill via the outrigger, so that the rigidity of the side member can be improved. It is possible to suppress a large change in the angle between the lower surface and the side surface of the side member.

It is a perspective view which shows the principal part of the suspension member attachment structure by Example 1. FIG. FIG. 2 is a cross-sectional view taken along line SA-SA when a suspension member mounting bracket and an outrigger are mounted on a side member in FIG. 1. It is a figure explaining an effect | action when a protrusion part is provided in the corner | angular part of a side member. It is a figure explaining an effect | action when the protrusion part is not provided in the corner | angular part of a side member. In the suspension member mounting structure according to the second embodiment, the operation at the time of vehicle front collision will be described. FIG. 10 is a perspective view showing a main part of a suspension member mounting structure according to a third embodiment. It is sectional drawing along the SB-SB line | wire of FIG. It is sectional drawing along the SC-SC line of FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a main part of a suspension member mounting structure according to the present invention. A pair of side members 11 are provided on the left and right in the vehicle width direction, and are disposed along the vehicle front-rear direction. FIG. 1 shows the left side member of the pair of side members provided and the front side member. In FIG. 1, FR indicates the front side of the vehicle, OTR indicates the outside in the vehicle width direction, and UPR indicates the upper side of the vehicle.

  The front side of the side member 11 is horizontal, and is bent obliquely downward near the bent portion 11A indicated by the broken line, and is bent in the horizontal direction near the bent portion 11B indicated by the broken line. That is, when the side member 11 is mounted on a vehicle, a portion on the front side of the bent portion 11A and a portion on the rear side of the bent portion 11B are horizontal, but between the bent portion 11A and the bent portion 11B. The portion is inclined (see FIG. 5). The side member 11 includes an inner side member 12 disposed on the inner side in the vehicle width direction, and a closing 13 disposed on the outer side in the vehicle width direction.

  The inner side member 12 has an L-shaped cross section, and has a lower surface 12A and a side surface 12B disposed upward from a side end portion of the lower surface 12A. A corner portion 12C is formed at a portion where the lower surface 12A and the side surface 12B intersect, and the angle between the lower surface 12A and the side surface 12B is substantially a right angle. The tip of the lower surface 12A is bent downward at a substantially right angle, and this bent portion forms a lower flange 12D.

  On the other hand, the closing 13 has an L-shaped cross section opposite to the inner side member 12, and has a lower surface 13A and a side surface 13B arranged upward from the side end of the lower surface 13A. ing. A corner portion 13C is formed at a portion where the lower surface 13A and the side surface 13B intersect, and the angle between the lower surface 13A and the side surface 13B is substantially a right angle. The tip of the lower surface 13A is bent downward at a substantially right angle, and this bent portion forms a lower flange 13D.

  The lower flange 12D of the inner side member 12 and the lower flange 13D of the closing 13 are coupled to each other to form the side member 11.

  The inner side member 12 is provided with an upper flange 12E in the horizontal portion on the front side, and an upper flange 12F (see FIG. 2) in the inclined portion and the horizontal portion on the rear side. The upper flange 12E is bent toward the outer side in the vehicle width direction (closing 13 side). The upper flange 12F is bent inward in the vehicle width direction.

  Further, the closing 13 is provided with an upper flange 13E at the front horizontal portion, and an upper flange 13F at the inclined portion and the rear horizontal portion. The upper flange 13E is bent toward the inner side in the vehicle width direction (inner side member 12 side). The upper flange 13F is bent outward in the vehicle width direction.

  The lower flange 12D of the inner side member 12 and the lower flange 13D of the closing 13 are partially expanded downward in a substantially triangular shape in the inclined portion between the bent portion 11A and the bent portion 11B. An enlarged portion 14 is formed in the portion. A suspension member mounting bracket (suspension member support portion) 15 is attached to the enlarged portion 14.

  The suspension member mounting bracket 15 includes a bottom wall 15A bent into a dogleg shape, and a side wall 15B disposed upward at a side end portion (side end portion in the vehicle width direction) of the bottom wall 15A. Have. Further, a flange 15C is provided at a side end portion (side end portion on the outer side in the vehicle width direction) of the bottom wall 15A. The upper end of the side wall 15B is joined to the side surface 12B of the inner side member 12, and the flange 15C is joined to the lower flange 12D of the inner side member 12 by welding or the like. As a result, the suspension member mounting bracket 15 is mounted on the lower surface of the side member 11 (see FIG. 2).

  A bolt hole 15D is formed in the bottom wall 15A of the suspension member mounting bracket 15 at substantially the center thereof. A bolt hole 12G (see FIG. 2) is also formed in the bottom surface 12A of the inner side member 12. A suspension member (not shown) is fixed to the suspension member mounting bracket 15 by a bolt inserted into the bolt hole 15D and the bolt hole 12G. Here, the alternate long and short dash line in the figure indicates the position of the bolt.

  In the present embodiment, a protruding portion 16 that protrudes from the inside of the side member 11 toward the outside is formed at a corner portion 13C near the suspension member mounting bracket 15 of the corner portion 13C of the closing 13. . The side member 11 is disposed in the vehicle front-rear direction, and the protruding portion 16 is formed in the vehicle front-rear direction along the corner portion 13C.

  FIG. 2 is a cross-sectional view taken along the line SA-SA when the suspension member mounting bracket 15 and the outrigger 17 are mounted on the side member 11 in FIG. As shown in FIG. 2, the protruding portion 16 protrudes obliquely downward on the outer side in the vehicle width direction, and the tip portion of the protruding portion 16 is a flat surface 16A. In addition, the suspension member mounting bracket 15 has a bottom wall 15A and a side wall 15B arranged substantially at right angles, and has a L-shaped cross section.

  A side sill 18 is disposed on the outer side of the side member 11 along the vehicle width direction, and the outrigger 17 connects the side member 11 and the side sill 18 together. That is, one end (outer end in the vehicle width direction) of the outrigger 17 is coupled to the flat surface 16A of the protrusion 16 of the closing 13 by welding or the like, and the other end (outer end in the vehicle width direction) of the outrigger 17 ) Is coupled to the lower portion of the side sill 18 by welding or the like.

  Next, the effect | action of a present Example is demonstrated using FIG.3 and FIG.4. Here, FIG. 3 shows the operation when the protruding portion 16 is provided on the closing 13 (this embodiment), and FIG. 4 shows the operation when the protruding portion is not provided on the closing 13 (reference example). In both figures, the two-dot chain line shows the state before deformation, and the solid line shows the state after deformation.

  In the suspension member mounting structure of the present embodiment, as shown in FIG. 3, when a lateral swinging force F1 outward in the vehicle width direction is applied to the suspension, the force F1 is applied to the flange 15C of the suspension member mounting bracket 15, the inner It is transmitted to the closing 13 via the lower flange 12D of the side member 12 and the lower flange 13D of the closing 13. In this case, since the protrusion 13 is provided at the corner 13C (see FIG. 1) of the closing 13, the rigidity of the corner 13C is improved and the deformation of the closing 13 is suppressed. That is, in the closing 13, the angle θ between the lower surface 13A and the side surface 13B does not change so much because the rigidity of the corner portion 13C is improved (before the deformation, the angle θ is substantially a right angle), and the position of the corner portion 13C is also Not much displacement.

  Further, the deformation of the closing member 13 is suppressed, so that the deformation of the inner side member 12 is also suppressed, so that the position of the suspension member mounting bracket 15 is not greatly displaced. That is, the side member 11 is not greatly deformed even when the lateral deflection force F1 outward in the vehicle width direction is applied, so the position of the bolt for fixing the suspension (the one-dot chain line in the figure indicates the position of the bolt). Not shown). As a result, good running stability can be maintained.

  In the suspension member mounting structure shown as a reference example, as shown in FIG. 4, when a lateral deflection force F1 outward in the vehicle width direction is applied to the suspension, the force F1 is applied to each flange as in FIG. It is transmitted to the closing 13 via 15C, 12D and 13D, and the closing 13 is greatly deformed. That is, in this reference example, since the closing portion 13 of the closing portion 13 is not formed with the protruding portion 16, the angle θ between the lower surface 13A and the side surface 13B is greatly changed, and the position of the corner portion 13C is also changed. Displaces greatly. Further, a large force is applied to the outrigger 17 in the out-of-plane direction, and as shown in the figure, the center portion of the outrigger 17 is greatly recessed downward.

  In contrast, in the suspension member support structure according to the present embodiment, as described above, the protrusions 16 are formed at the corners 13C of the closing 13, so that the rigidity of the corners 13C is improved and the lateral deflection force F1 is applied. Sometimes, the outrigger 17 can be prevented from being greatly deformed in the out-of-plane direction, and as a result, the lateral shake force F1 can be received by the outrigger 17.

  According to the present embodiment, since the protruding portion 16 is formed in the vehicle front-rear direction along the corner portion 13C of the closing 13, the rigidity of the side member 11 in the vehicle front-rear direction is improved, and the vehicle is input from the suspension. The support rigidity of the side member 11 can be improved even with respect to the force in the front-rear direction.

  In addition, the protrusion part 16 may not be a continuous thing, but may be formed in dot shape along the corner | angular part 13C of the closing 13. FIG.

  FIG. 5 shows a second embodiment. In the present embodiment, a vertical bead 21 in the vehicle vertical direction is formed on the side surface 13B of the closing 13 in the inclined portion of the side member 11. A lateral bead 22 (see FIG. 6) in the vehicle width direction is formed on the lower surface 13A of the closing 13. The vertical beads 21 are formed to protrude outward in the vehicle width direction, and the horizontal beads 22 are formed to protrude downward in the vehicle (see FIG. 7). The vertical beads 21 and the horizontal beads 22 intersect with the protrusions 16 formed at the corners 13C of the closing 13, and the intersecting positions coincide with each other in the vehicle front-rear direction (see FIG. 6).

  Further, the front end portion of the protruding portion 16 is positioned in front of the front end portion of the suspension member mounting bracket 15, and the rear end portion of the protruding portion 16 is positioned rearward of the rear end portion of the suspension member mounting bracket 15. .

  A suspension member 23 is provided below the side member 11, and a rear end portion of the suspension member 23 is coupled to the suspension member mounting bracket 15 by a bolt. Further, the side member 11 is provided with a front side bracket 24, and the front portion of the suspension member 23 is coupled to the side member 11 via the front side bracket 24. Further, a dash panel 25 and a floor panel 26 are provided on the upper surface of the side member 11.

  Next, the operation of this embodiment will be described. In the present embodiment, since the protruding portion 16 is formed on the side member 11, the rigidity of the side member 11 is increased. When the impact force F2 is applied to the front end portion of the side member 11 at the time of the frontal collision of the vehicle, the vertical bead 21 and the horizontal bead 22 are crushed. As shown in the figure, the side member 11 has the vertical bead 21 and the horizontal bead 22 A clockwise moment M acts around the vicinity where the is formed.

  On the other hand, at the time of frontal collision of the vehicle, an impact force F2 is also applied to the front end portion of the suspension member 23, and the suspension member 23 is subjected to a counterclockwise moment m around the suspension member mounting bracket 15.

  Since the moment M and the moment m are opposite to each other, they cancel each other, and the impact force acting on the side member 11 and the suspension member 23 can be reduced. As a result, the retraction amount of the dash panel 25 can be reduced.

  According to the present embodiment, the elastic deformation in the out-of-plane direction of the side surface 13B of the closing 13 is suppressed by the vertical beads 21, and the deformation of the side member 11 can be further suppressed.

  Further, according to the present embodiment, the lateral bead 22 suppresses elastic deformation of the lower surface 13A of the closing 13 in the out-of-plane direction, whereby the deformation of the side member 11 can be further suppressed.

  Further, according to the present embodiment, the vertical beads 21 and the horizontal beads 22 intersect with the protruding portions 16 formed at the corner portions 13C of the closing 13, and the intersecting positions coincide with each other in the vehicle front-rear direction. The deformation of the side member 11 can be further suppressed.

  Furthermore, according to the present embodiment, the front end portion of the projecting portion 16 is positioned in front of the front end portion of the suspension member mounting bracket 15, and the rear end portion of the projecting portion 16 is from the rear end portion of the suspension member mounting bracket 15. Also, the strength of the side member 11 in the vicinity of the suspension member mounting bracket 15 can be increased. Thereby, at the time of a vehicle front collision, the front part of the side member 11 is crushed before the vicinity of the suspension member mounting bracket 15, and the impact force can be reliably absorbed by the front part of the side member 11 due to the collision.

  6 to 8 show a third embodiment, FIG. 6 is a perspective view of the main part of the present embodiment, FIG. 7 is a sectional view taken along line SB-SB in FIG. 6, and FIG. It is sectional drawing along SC line. In this embodiment, a bead 31 is formed on the outrigger 17 along the vehicle width direction. The bead 31 protrudes downward from the vehicle. Further, the bead 31 is aligned with the vertical bead 21 and the horizontal bead 22 in the vehicle longitudinal direction.

  According to the present embodiment, since the bead 31 is formed on the outrigger 17, the rigidity of the outrigger 17 is improved. As a result, when a lateral swing force F1 (see FIG. 3) is applied to the side member 11 and an out-of-plane force is applied to the outrigger 17, large deformation of the outrigger 17 is suppressed, and the lateral swing force F1 is used as the outrigger 17 You can catch it.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, each of the above embodiments is only an example of the present invention, and the present invention is not limited only to the configuration of each of the above embodiments. . Needless to say, changes in design and the like within the scope of the present invention are included in the present invention.

  For example, in each of the above embodiments, the example in which the suspension member mounting structure of the present invention is applied to the vehicle front side suspension has been described. However, the suspension member mounting structure of the present invention can also be applied to the vehicle rear side suspension.

11 Side member 12 Inner side member 12A Lower surface 12B Side surface 12C Corner portion 13 Closing 13A Lower surface 13B Side surface 13C Corner portion 15 Suspension member mounting bracket 16 Protruding portion 17 Outrigger 18 Side sill 21 Vertical bead 22 Horizontal bead 23 Suspension member 31 Bead

Claims (7)

A side member extending in the longitudinal direction of the vehicle,
A side sill extending in the vehicle longitudinal direction on the outside of the vehicle of the side member;
An outrigger provided between the side member and the side sill and connecting the side member and the side sill;
A suspension member support portion provided on the lower surface of the side member and supporting the suspension member;
Among the side members, a corner portion where a lower surface provided with the suspension member support portion and a side surface disposed upward from a side end portion of the lower surface crosses from the inner side to the outer side of the side member. Provided with a protruding part
A suspension member mounting structure, wherein the protruding portion and the outrigger are combined.   The suspension member mounting structure according to claim 1, wherein the protrusion is formed in the vehicle front-rear direction along the corner.   The suspension member mounting structure according to claim 2, wherein a vertical bead is provided on a side surface of the side member, and the vertical bead intersects the protruding portion.   The suspension member mounting structure according to claim 2, wherein a lateral bead in a vehicle width direction is provided on a lower surface of the side member, and the lateral bead intersects with the protruding portion. A vertical bead in the vertical direction is provided on the side surface of the side member, and the vertical bead intersects the protruding portion,
The suspension member mounting structure according to claim 2, wherein a lateral bead in a vehicle width direction is provided on a bottom surface of the side member, and the lateral bead intersects the protruding portion.   The suspension member mounting structure according to claim 5, wherein the vertical bead and the horizontal bead are aligned with each other in the vehicle front-rear direction.   The suspension member mounting structure according to claim 6, wherein the outrigger is provided with a bead in a vehicle width direction, and the bead has a position in the vehicle front-rear direction that coincides with the vertical bead and the horizontal bead. .

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