JP2018184077A - Vehicle body structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a vibration attenuation effect so as to be efficient in weight by forming a reinforcement body in a highly rigid and light-weight structure.SOLUTION: A vehicle body structure has a reinforcement body 10 jointed to an internal surface of a closed cross-sectional part 4 formed by a vehicle body compositional member. A joining part of respective internal surfaces 2a, 3a of the closed cross-sectional part 4 and the reinforcement body 10 has a rigid binding part 15 and a soft binding part 16. The reinforcement body 10 has: at least two flange parts 12 joined to the internal surface 3a of the closed cross-sectional part 4; and a coupling part 13 coupling the flange parts 12. The rigid binding part 15 is formed by joining the coupling part 13 to the internal surface 3a of the closed cross-sectional part 4 via the flange part 12. The soft binding part 16 is formed by joining so as to sandwich a vibration attenuation member 21 between the coupling part 13 and the internal surface 2a of the closed cross-sectional part 4. The coupling part 13 is formed in a spherical or curved shape.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle body structure of a vehicle having a reinforcing body joined to an inner surface of a closed cross section formed by a vehicle body constituent member.

  Generally, a vehicle body constituting member as a vehicle frame such as a floor frame, a side sill, a pillar, a roof side rail, and a floor cross member has a closed cross section formed by one or more members.

  In a vehicle body structural member having such a closed cross section, in order to improve riding comfort performance, the reinforcing body is joined to the inner surface of the closed cross section so as to reduce vibration transmitted to the vehicle body structural member. Various techniques arranged in the closed cross section are known.

  For example, the vehicle body structure of a vehicle disclosed in Patent Document 1 has a rigid coupling portion and a flexible coupling portion as a joint portion between a vehicle body constituent member and a reinforcing body, thereby effectively suppressing vibration while ensuring rigidity. is there.

  The rigid coupling portion is obtained by directly joining a flange provided in a reinforcing body formed in a side view portal shape to the inner surface of the closed cross-section portion, and the flexible coupling portion includes the inner surface of the closed cross-section portion and the inner surface of the closed cross-section portion. Are joined via a damping member to a flat flexible flange portion that constitutes a part of the reinforcing body and is disposed in parallel to the reinforcing member.

  However, the vehicle body structure of the vehicle disclosed in Patent Document 1 is provided with a reinforcing portion (vertical flange portion or the like) that reinforces the damping member so that the damping member does not bend and deform, or the reinforcing body is formed in a side-view portal shape. By adopting such a configuration, there is a possibility that the weight can be increased while the vibration can be suppressed while ensuring the rigidity as a whole, and there is room for further improvement in terms of weight reduction and weight efficiency.

JP 2014-162400 A

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a vehicle body structure of a vehicle that can obtain a vibration damping effect in a weight efficient manner by forming a reinforcing body with a rigid and lightweight structure. To do.

  The present invention provides a vehicle body structure having a reinforcing body joined to an inner surface of a closed cross section formed by a vehicle body component, wherein the joint between the inner surface of the closed cross section and the reinforcing body is a rigid coupling portion. And the flexible body has at least two flange portions joined to the inner surface of the closed cross-section portion, and a connecting portion that connects these flange portions, The coupling portion is formed by joining the inner surface of the closed cross-section portion via the flange portion, and the flexible coupling portion sandwiches a vibration damping member between the connection portion and the inner surface of the closed cross-section portion. In this way, the connecting portion is formed as a spherical surface or a curved surface.

  According to the said structure, a vibration damping effect can be acquired with a weight efficiency by forming the said reinforcement body (node member) with a rigid and lightweight structure. In particular, among the vibration damping effects, the vibration damping effects of the three modes of the torsional mode, rhombus mode, and bending mode of the vehicle body constituent member can be enhanced.

  Here, the vibration damping member is a member having a Young's modulus lower than that of the connecting portion and the flange portion, in other words, a member having superior viscoelastic properties than the connecting portion and the flange portion.

  As an aspect of the present invention, in the flexible joint portion, a flat portion is formed at a portion facing the inner surface of the closed cross-section portion of the connecting portion, and the flat portion and the inner surface of the closed cross-section portion have the above-mentioned between them. The vibration damping member is sandwiched.

  According to the said structure, the contact area of a connection part and a vibration damping member can be expanded, and the vibration damping effect can be acquired further.

  As an aspect of the present invention, the vibration damping member is disposed so as to include the planar portion in a plan view and have a larger area than the planar portion.

  According to the said structure, the contact area of the said plane part of the said connection part and a vibration damping member can be ensured reliably irrespective of the joining precision to the said closed cross-section part inner surface of the said reinforcement body at the time of manufacture.

  As an aspect of the present invention, the closed section is formed by at least two vehicle body constituent members, and the flange portion and the vibration damping member are joined to the different vehicle body constituent members.

  According to the above configuration, the vehicle body constituent member (the vehicle body constituent member having the flexible coupling portion) on the side to which the vibration damping member is joined from the vehicle body constituent member on the side joined to the flange portion (the vehicle body constituent member having the rigid joint portion). The vibration transmitted to can be effectively suppressed.

  As an aspect of the present invention, an inner surface of the plurality of closed cross-section portions constituting the closed cross-section portion is provided with a damping member joint surface that joins the vibration damping member, an opposing surface that faces the damping member joint surface, and the damping A non-facing surface that does not oppose the member joining surface, the facing surface and the non-facing surface are constituted by the same vehicle body constituent member, and the damping member joining surface is another vehicle body constituent member different from the vehicle body constituent member The flange portion includes a first flange portion joined to the facing surface and a second flange portion joined to the non-facing surface.

  According to the above configuration, the vibration damping effect can be enhanced by further increasing the rigidity.

  As an aspect of the present invention, the connecting portion is formed in a curved shape that is curved only when viewed from a cross-sectional view in the longitudinal direction of the closed cross section, and a flange-like end is formed at the end in the longitudinal direction of the connecting portion. A reinforcing part is formed.

  According to the above configuration, the vibration damping effect can be enhanced by further increasing the rigidity.

  As an aspect of the present invention, a bead is formed at the connecting portion.

  According to the said structure, rigidity can further be improved with the said bead and, thereby, a vibration damping effect can be improved.

  According to the present invention, the vibration damping effect can be obtained in a weight efficient manner by forming the reinforcing body with a highly rigid and lightweight structure.

The perspective view which shows the vehicle body structure of the vehicle of this invention of 1st Embodiment. AA sectional view taken on the line AA of FIG. BB sectional drawing of FIG. The CC sectional view taken on the line of FIG. The perspective view (a) and top view (b) of the reinforcement body of 1st Embodiment. The side view (a) and front view (b) of the reinforcement body of 1st Embodiment. The frequency characteristic figure of each inertance of 1st Embodiment and a comparative example. The perspective view which shows the vehicle body structure of the vehicle of this invention of 2nd Embodiment. The perspective view which shows the vehicle body structure of the vehicle of this invention of 3rd Embodiment. The perspective view which shows the vehicle body structure of the vehicle of this invention of 4th Embodiment.

Hereinafter, embodiments of the present invention will be described in detail.
First, prior to the description of the configuration of the vehicle body structure of the vehicle according to the first embodiment, although not shown, the vehicle body front structure in which the front side frame is disposed will be briefly described.

  Although not shown in the front of the vehicle, a dash panel that partitions the engine room and the vehicle compartment and a pair of left and right front side frames that extend forward from the front of the dash panel through the left and right sides of the engine room are provided. Yes.

  A kick-up portion is integrally formed at the rear portion of the front side frame so as to be inclined downwardly and along the front surface and the lower surface of the dash panel. A crash can is connected to the front end of the front side frame via a flange.

  A substantially cylindrical engine mount is provided in the front-rear direction intermediate portion between the crash can and the kick-up portion of the front side frame, and the engine disposed in the engine room is elastically supported by the engine mount.

(First embodiment)
1 is a perspective view schematically showing a frame member provided with a reinforcing body as a vehicle body structure of a vehicle according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. FIG. 4 is a sectional view taken along the line CC of FIG. 2, FIG. 5 is a perspective view (a) and a plan view (b) of the reinforcing body of the first embodiment, and FIG. 6 is the first embodiment. It is the side view (a) and front view (b) of the reinforcement body of a form.

  Hereinafter, a first embodiment in which a frame member 1 provided in a vehicle body structure of a vehicle according to the present invention is applied to the above-described front side frame will be described with reference to FIGS.

  A frame member 1 serving as a front side frame is divided into a left and right part by a hat-shaped member 2 (for example, an inner member) having a substantially hat-shaped cross section and a panel member 3 (for example, an outer member) having a substantially panel shape. A closed cross section 4 extending in the front-rear direction is formed.

  Here, the width direction of the above-mentioned closed cross section 4 is the arrow X direction in each drawing, the depth direction (or height direction) of the closed cross section 4 is the arrow Y direction, and the longitudinal direction (extension) of the closed cross section 4 is The installation direction) is the arrow Z direction. That is, the cross section orthogonal to the arrow Z direction of the closed section 4 is a plane including the arrow X direction and the arrow Y direction.

  Further, the right side of each drawing in the arrow X direction is the arrow X1 direction, the left side of each drawing is the arrow X2 direction, and the upper side of each drawing in the arrow Y direction is the arrow Y1 direction. The arrow Y2 direction is the side, the arrow Z1 direction (vehicle front) is the front side of the drawing in the arrow Z direction, and the back side of the drawing is arrow Z2 (vehicle rear).

The above-described hat-shaped member 2 includes a base wall 2B, a pair of side walls 2S and 2S continuous with the base wall 2B, and an end of the side walls 2S and 2S on the side opposite to the base wall 2B from the closed cross section 4 outward. It is a vehicle body strength member in which extending flange portions 2F and 2F are integrally formed.
Moreover, although the flat plate member was illustrated as the above-mentioned panel member 3, the cross section may be a hat shape or a reverse hat shape member similarly to the hat-shaped member 2.

  As shown in FIGS. 1 to 4, the frame member 1 described above includes the flange portions 2 </ b> F and 2 </ b> F of the hat-shaped member 2 and the panel member 3 joined at a plurality of locations along the arrow Z direction at the spot welded portion Sa. Is formed.

  The frame member 1 is thus formed by the hat-shaped member 2 and the panel member 3, and includes a reinforcing body 10 in the closed cross-sectional portion 4. The reinforcing body 10 is joined to the inner surface of the closed cross-section portion 4 (the hat-shaped member 2 constituting the closed cross-section portion 4 and the inner surfaces 2a and 3a of the panel member 3). It is disposed in the vicinity of the rear side of the mounting location of the mount, that is, in the front portion of the kick-up portion.

  As shown in FIGS. 1 to 4, the reinforcing body 10 includes a reinforcing body body member 11 and a vibration damping member 21.

  As shown in FIGS. 5 (a), 5 (b), 6 (a) and 6 (b), the reinforcing body body member 11 includes a plurality of flange portions 12 joined to the inner surface of the closed cross section 4 and the flanges. It is formed integrally with a connecting portion 13 that connects the portions 12.

  The connecting portion 13 is formed in a hollow shape whose inside opens in the direction of the arrow Y2 (panel member 3 side), and the entire thickness is formed substantially integrally. The whole is formed in a substantially hemispherical shape (so-called bowl-like shape) that becomes a shape on one side when divided into two along the long axis of the long sphere (ellipsoid), and in plan view (from the arrow Y1 side to Y2 It is formed in an elliptical shape having a major axis extending in the arrow Z direction (as viewed from the direction) and a minor axis extending in the X direction.

  The outer peripheral surface of the connecting portion 13 is not limited to a spherical surface such as a hemispherical shape or a hemispherical shape, and is formed with another curved surface (curved surface) if it does not have corners or the like so that the load is difficult to concentrate on a part. May be. The connecting portion 13 is not limited to a curved surface having a substantially constant curvature, and may be formed from a plurality of curved surfaces having two or more different curvatures.

  As shown in FIGS. 6A and 6B, the connecting portion 13 is disposed so that the opening side (Y2 direction side) of the connecting portion 13 faces the inner surface 3 a of the panel member 3, and the outer peripheral edge in a side view. It is formed in a semicircular arc shape that protrudes substantially in the direction of the arrow Y1 from the (opening edge), and is arranged in the closed cross section 4 so that the top portion 17 faces the inner surface 2a of the base wall 2B of the hat-shaped member 2. ing.

  A flat plane portion 14 is formed on the top portion 17 of the connecting portion 13 so as to face the inner surface 2a of the base wall 2B of the hat-shaped member 2 in parallel with a gap therebetween. The planar portion 14 is formed in an elliptical shape that is coaxial with the major and minor axes of the connecting portion 13 in plan view (see FIGS. 5A and 5B).

  As shown in FIGS. 1 to 4, the flange portion 12 is formed as a leg portion that supports the connecting portion 13 so that the connecting portion 13 is arranged in the closed cross-section portion 4.

  In this example, three flange portions 12 are provided, all of which extend from the outer peripheral edge of the connecting portion 13 in the direction of the arrow Y2 (panel member 3 side), and bend and extend outward from the tip portion.

  Specifically, as shown in FIGS. 5A and 5B in particular, the three flange portions 12 are phase-separated in the X direction toward the tip at the portion on the outer peripheral edge of the connecting portion 13 on the arrow Z1 direction side. And a pair of front flange portions 12f, 12f extending in the Z1 direction and a rear flange portion 12r extending in the arrow Z2 at a portion on the arrow Z2 direction side.

  As shown in FIGS. 1 to 4, the three flange portions 12 (12 f, 12 f, 12 r) are all in contact with the inner surface 3 a of the panel member 3 in a surface contact state, and are joined and fixed at the spot welded portion Sb. ing. That is, the connecting portion 13 is joined to the inner surface 3 a of the panel member 3 via the flange portion 12 to form the rigid coupling portion 15. Note that the inner surface 3a of the panel member 3 to which the three flange portions 12 are joined corresponds to a facing surface facing the inner surface 2a of the base wall 2B of the hat-like member 2 as a vibration damping member joining surface (2a) described later. To do.

  As shown in FIGS. 1 to 4, the vibration damping member 21 is interposed between these connecting portions 13 and 2 a so as to fill a gap between the connecting portion 13 and the inner surface 2 a of the base wall 2 </ b> B of the hat-shaped member 2. Intervene. Furthermore, the vibration damping member 21 includes at least the plane part 14 in plan view, in other words, includes the plane part 14 in plan view and has a larger area than the plane part 14. It is disposed between the inner surface 2a of the wall 2B.

  Here, as the vibration damping member 21, a viscoelastic member having a storage elastic modulus of 500 MPa or less and a loss coefficient of 0.2 or more under a condition where the temperature is 20 ° C. and the frequency of the excitation force is 30 Hz. Use.

  The vibration damping member 21 itself has an adhesive action, and has a relatively high viscosity before drying, and is also referred to as a damping bond. The inner surface 2a of the base wall 2B of the hat-shaped member 2 and the connecting portion 13 are joined to each other only by the adhesive force of the vibration damping member 21.

  In this way, the inner surface 2a of the base wall 2B of the hat-shaped member 2 and the connecting portion 13 are not rigidly joined by spot welding or the like, but are joined only by the vibration damping member 21, thereby increasing the rigidity of the joined portion. Therefore, the vibration absorbability of the vibration damping member 21 is not impaired.

  Specifically, the vibration damping member 21 is joined in contact with the inner surface 2a of the base wall 2B of the hat-like member 2 as the vibration damping member joining surface (2a), and the outer peripheral surface of the connecting portion 13 is joined. Are joined in contact with the entire flat portion 14 and its peripheral portion. As described above, the vibration damping member 21 is joined to the connecting portion 13 so as to include the flat surface portion 14 and to come into contact with the wider area than the flat surface portion 14.

  As described above, the flexible coupling portion 16 is formed by sandwiching the vibration damping member 21 between the coupling portion 13 and the inner surface 2a of the base wall 2B of the hat-shaped member 2.

  Further, as described above, the flange portion 12 is joined to the inner surface 3a of the panel member 3, and the vibration damping member 21 is joined to the inner surface 2a of the base wall 2B of the hat-like member 2 so as to be softly coupled to the rigid coupling portion 15. The part 16 is formed in different vehicle body constituting members (each of the panel member 3 and the hat-like member 2) constituting the closed cross-section part 4.

  In this example, a rigid coupling portion 15 is formed on the panel member 3 side of the engine mount that is the excitation point, and the hat-shaped member 2 side that transmits vibration from the panel member 3 through the reinforcing body 10 is mainly used. The soft coupling part 16 is formed.

  FIG. 7 is a frequency characteristic diagram of each inertance of the present example and the comparative example as a simulation result performed to verify the effectiveness of the frame member 1 including the reinforcing body 10 of the first embodiment. In FIG. 7, the waveform indicated by the solid line indicates the waveform of this embodiment, and the waveform indicated by the broken line indicates the waveform of the comparative example.

  In this simulation, as shown in FIG. 2, a predetermined point on the side of the panel member 3 on one end side in the Z direction (longitudinal direction) of the closed cross section 4 (in this example, the engine mount arrangement portion of the front side frame) is added. A predetermined point on the hat-like member 2 side on the other end side in the longitudinal direction of the closed cross-section portion 4 (the middle portion of the kick-up portion behind the engine mount arrangement portion of the front side frame in this example) ) As a response point y.

  Further, in this simulation, the space between the excitation point x and the response point y in the longitudinal direction of the closed section 4 (in this example, an intermediate position between the excitation point x and the response point y in the front-rear direction of the front side frame) is reinforced. It is a body arrangement point.

  The reinforcing body 10 according to the first embodiment described above is employed as the present example, and as a comparative example, as illustrated in Patent Document 1 (Japanese Patent Laid-Open No. 2014-162400), the side-view portal-shaped reinforcing body body. A reinforcing body provided with a damping member interposed between the member and the reinforcing body main body member and the inner surface of the closed cross-section facing the member is employed.

In FIG. 7, the inertance (magnitude of acceleration amplitude per unit exciting force: mm / s ² / N) at the response point according to the frequency of the exciting force is compared between the present embodiment and the comparative example. Yes.

  As shown in FIG. 7, in the frequency band lower than the high frequency band A, the present embodiment and the comparative example had substantially the same inertance. However, in the high frequency band A, the present embodiment was more effective than the comparative example. The result was clearly lower inertance (ie higher vibration damping).

  Thus, compared with the comparative example, the present embodiment has an equal or greater attenuation amount in the process of transmitting vibration from the excitation point x to the response point y. Therefore, the frame member 1 of the first embodiment The vibration damping effect was confirmed.

  That is, in the case of the gate-shaped reinforcing body body member (bracket) of the comparative example, the vibration damping effect of the vibration damping member is diminished by the deformation of the reinforcing body body member itself. The vibration damping effect of the vibration damping member 21 can be further enhanced by forming the member 11 with a spherical surface or curved surface having a higher rigidity than the gate shape.

  The frame member 1 according to the present embodiment is a vehicle body structure having a reinforcing body 10 joined to an inner surface of a closed cross-section portion 4 formed by a vehicle body constituent member, and includes inner surfaces 2a and 3a (hats) of the closed cross-section portion 4. The joint between the inner surface 2a of the base wall 2B of the shaped member 2 and the inner surface 3a) of the panel member 3 and the reinforcing body 10 has a rigid coupling portion 15 and a flexible coupling portion 16, and the reinforcing body 10 has a closed cross section. Three flange portions 12 (12f, 12f, 12r) joined to the inner surface 3a of the portion 4 and a connecting portion 13 for connecting these flange portions 12 (FIGS. 5A and 5B) 6 (a) and 6 (b)), the rigid coupling portion 15 is formed by joining the coupling portion 13 to the inner surface 3a of the closed cross-sectional portion 4 via the flange portion 12, and the flexible coupling portion 16 is formed. The vibration damping member 21 is sandwiched between the connecting portion 13 and the inner surface 2a of the closed section 4. It has been formed by joining the one in which the formation of the connecting portion 13 with a spherical surface or a curved surface (see FIGS. 1 to 4).

  According to the above configuration, the vibration damping effect can be obtained with high weight efficiency by forming the reinforcing body 10 (node member) with a highly rigid and lightweight structure.

  Specifically, the reinforcing body disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2014-162400) is moved from the inner surface of the closed cross-section portion into the closed cross-section portion 4 at each position spaced by a predetermined interval in the longitudinal direction of the closed cross-section portion. A gate shape in a side view of the closed section 4 (that is, in the X direction view) by a pair of vertical wall portions that rise and a flexible coupling flange portion 12 that connects the free ends of the pair of vertical wall portions along the longitudinal direction. (Hat-shaped).

On the other hand, by forming the reinforcing body 10 in a curved surface shape as in the present embodiment, the surface area (material) of the reinforcing body 10 itself is reduced as compared with the conventional side-view-type reinforcing body, and Rigidity can be ensured without increasing the plate thickness. In addition, since the reinforcing body 10 has a curved surface shape that does not have corner portions, the rigidity and load transmission efficiency can be increased as compared with a side-view portal shape that has corner portions. The vibration damping effect in the (vibration damping member 21) can be enhanced.
In particular, among the vibration damping effects, the vibration damping effects of the three modes of the torsional mode, rhombus mode, and bending mode of the vehicle body constituent member can be enhanced.

  As an aspect of the present invention, the closed cross-section portion 4 is formed of at least two vehicle body constituting members by the panel member 3 and the hat-like member 2, and the flange portion 12 is joined to the inner surface 3a of the panel member 3 (vehicle body constituting member). The vibration damping member 21 is joined to the inner surface 2a of the base wall 2B of the hat-shaped member 2 (a vehicle body structural member different from the panel member 3) (see FIGS. 1 to 4).

  According to the said structure, the hat-shaped member 2 (vehicle body structural member which has the flexible coupling part 16) which joined the vibration damping member 21 from the panel member 3 (hat-shaped member 2 which has the rigid coupling part 15) which joined the flange part 12 The vibration transmitted to can be effectively suppressed.

  As an aspect of the present invention, a flat portion 14 is formed in a portion (top portion 17) of the flexible joint portion 16 facing the base wall 2B of the hat-shaped member 2 of the connecting portion 13, and the flat portion 14 and the base wall 2B are formed. The vibration attenuating member 21 between them is sandwiched between the inner surface 2a (see FIGS. 1, 2, and 4).

  According to the above configuration, the contact area between the connecting portion 13 and the vibration damping member 21 can be increased, and a further vibration damping effect can be obtained.

  As an aspect of the present invention, the vibration attenuating member 21 is disposed so as to include the flat portion 14 in a plan view and to have an area larger than the flat portion 14 (see FIGS. 1 to 4).

  According to the above configuration, the contact area between the flat surface portion 14 of the connecting portion 13 and the vibration damping member 21 can be reliably ensured regardless of the accuracy of joining the inner surface 2a of the base wall 2B of the reinforcing body 10 during manufacturing. it can.

  Hereinafter, the frame member provided with the reinforcement body of other embodiment is demonstrated. However, the same components as those of the frame member 1 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

(Second Embodiment)
FIG. 8 is a perspective view of the frame member 1A provided with the reinforcing body 10A of the second embodiment. Here, the reinforcing body body member 11A provided in the reinforcing body 10A includes a connecting portion 13A and two flange portions 12A and 12A. And are integrally formed.

  13 A of connecting parts are integrally formed by the top part 17A which has the plane part 14, and a pair of leg parts 18 and 18 extended from the top part 17A to the side which separates this top part 17A in planar view. The pair of leg portions 18, 18 both extend so as to protrude outward from the state of overlapping the vibration damping member 21 in plan view.

  The connecting portion 13A is formed integrally with the flange portions 12A and 12A that are bent and extended from the extending tips of the leg portions 18 and 18. The pair of flange portions 12 </ b> A and 12 </ b> A extend in directions away from each other from the extending tips of the leg portions 18 and 18, and are both joined to the inner surface 3 a of the panel member 3.

  The connecting portion 13A has an arrow on the intermediate side between the pair of flange portions 12A and 12A in the longitudinal direction L of the connecting portion 13A in the closed cross section 4 so as to connect the base portions of the pair of flange portions 12A and 12A. It curves and extends in an arch so as to protrude in the Y1 direction.

  In this way, the connecting portion 13A is curved in an arch shape along its longitudinal direction L (extending direction), and is also curved in an arch shape along its short direction S (width direction). Is formed. That is, the connecting portion 13A extends in an arch shape so as to protrude in the arrow Y1 direction toward the intermediate side in the short direction S of the connecting portion 13A from both side edges in the short direction.

  That is, the connecting portion 13A includes not only the top portion 17A (excluding the flat portion 14A) but also the pair of leg portions 18 and 18, and the curved surfaces of the outer peripheral surface and the inner peripheral surface of the connecting portion 13 of the first embodiment. It is formed in the shape (curvature) substantially the same as the curved surface.

  According to the frame member 1A of the second embodiment, the connecting portion 13A has a curved surface curved in an arch shape not only in the longitudinal direction L but also in the lateral direction S (width direction). Therefore, for example, it is possible to increase rigidity as compared with a belt-shaped (strip-shaped) flat plate member having a curved surface that is curved in an arch shape only along the longitudinal direction L, and the connecting portion 13 of the first embodiment. Rigidity can be ensured while forming with less material. That is, even in the frame member 1A provided with the reinforcing body 10A of the second embodiment, it is possible to obtain a vibration damping effect with high weight efficiency while ensuring rigidity.

(Third embodiment)
FIG. 9 is a perspective view of a frame member 1B provided with the reinforcing body 10B of the third embodiment. Here, the reinforcing body body member 11B provided in the reinforcing body 10B includes a connecting portion 13B and four flange portions 12B (12Ba). , 12Bb, 12Bc, 12d).

  The connecting portion 13B includes a top portion 17B located substantially in the center in plan view, and a plurality (four in this example) of leg portions 18B (18Ba, 18Bb, 18Bc, 18d) extending radially from the top portion 17B in plan view. It is formed with. Of these, the leg portion 18Ba extending in the arrow Z1 direction and the leg portion 18Bb extending in the arrow Z2 direction (strictly, closer to the arrow X1 direction with respect to the arrow Z2 direction) are the base wall 2B of the hat-shaped member 2. It extends toward the inner surface 2a.

  Here, in this example, the vibration damping member 21 is joined to the inner surface 3a of the panel member 3, and the flange portion 12B is joined to the inner surface 2a of the base wall 2B of the hat-like member 2 as will be described later. The surface is the inner surface 3 a of the panel member 3. For this reason, the inner surface 2a of the base wall 2B of the hat-shaped member 2 corresponds to a surface facing the inner surface 3a of the panel member 3 as a damping member bonding surface.

  Specifically, the flange portion 12Ba is bent and extended from the extending tip of the leg portion 18Ba, and the flange portion 12Ba is joined to the inner surface 2a of the base wall 2B of the hat-shaped member 2, and the leg portion 18Bb is extended. The flange portion 12Bb bends and extends from the leading end, and the flange portion 12Bb is joined to the inner surface 2a of the base wall 2B of the hat-shaped member 2.

On the other hand, of the remaining two leg portions 18Bc, 18d, the leg portion 18Bc extending mainly in the direction of the arrow X1 extends toward the inner surface 2c of the side wall 2S on the arrow X1 direction side of the hat-shaped member 2, and mainly the arrow. The leg portion 18d extending in the X2 direction extends toward the inner surface 2d of the side wall 2S of the hat-shaped member 2 on the arrow X2 direction side.
Here, the inner surfaces 2c and 2d of the side walls 2S and 2S are both non-facing surfaces that do not face the damping member bonding surface (3a).

  Then, the flange portion 12Bc is bent and extended from the extending end of the leg portion 18Bc, and the flange portion 12Bc is joined to the inner surface 2c of the side wall 2S of the hat-shaped member 2 on the arrow X1 direction side, and the leg portion 18Bd. The flange portion 12Bd bends and extends from the extending tip, and the flange portion 12Bd is joined to the inner surface 2d of the side wall 2S of the hat-shaped member 2 on the arrow X2 direction side.

  Further, the connecting portion 13B of the present embodiment is similar to the connecting portion 13A of the second embodiment, including not only the top portion 17B (excluding the flat surface portion 14B) but also the plurality of leg portions 18B, the respective outer peripheral surfaces and inner peripheral surfaces. Are formed in substantially the same shape (curvature) as the curved surface of the connecting portion 13 of the first embodiment.

  According to the frame member 1B of the third embodiment, on the plurality of inner surfaces constituting the closed cross-section portion 4, the damping member joining surface 3a that joins the vibration damping member 21 and the opposing surface that faces the damping member joining surface 3a. 2a and non-opposing surfaces 2c and 2d that do not oppose the damping member joint surface 3a. The opposing surface 2a and the non-opposing surfaces 2c and 2d are constituted by the same hat-shaped member 2, and the damping member joint surface 3a The flange portion 12 is configured by another panel member 3 different from the hat-like member 2, and the flange portion 12 is joined to flange portions 12Ba and 12Bb as first flange portions joined to the opposing surface 2a and non-opposing surfaces 2c and 2d. Two flange portions 12Bc and 12Bd are provided.

  According to the above configuration, the plurality of flange portions 12Ba, 12Bb, 12Bc, and 12Bd are not joined only to the facing surface 2a but are also dispersedly joined to the non-facing surfaces 2c and 2d, thereby further increasing the rigidity. And the vibration damping effect can be enhanced.

  Particularly in this example, the plurality of flange portions 12Ba, 12Bb, 12Bc, and 12Bd are alternately joined to each other between the facing surface 2a and the non-facing surfaces 2c and 2d in plan view. Since it can be joined well, the above effect can be enhanced.

(Fourth embodiment)
FIG. 10 shows a perspective view of a frame member 1C provided with the reinforcing body 10C of the fourth embodiment.

  Here, the reinforcing body main body member 11C provided in the reinforcing body 10C is integrally formed of the connecting portion 13C and the two flange portions 12C and 12C.

  13C of connection parts are formed in the curved surface shape which curves only when it sees from the orthogonal cross-section view of the arrow Z direction of the closed cross-section part 4. FIG. In other words, the connecting portion 13 </ b> C is formed in a curved surface shape such that a flat plate is curved around an axis extending in the arrow Z direction of the closed cross-sectional portion 4.

  That is, the connecting portion 13C has a long hole shape in which the cross section orthogonal to the arrow Z direction is long in the arrow X direction with respect to the arrow Y direction, and the cylindrical member extending in the arrow Z direction is divided into two (vertical) along the arrow X direction. It is formed in a substantially half-cylindrical cylindrical shape that becomes the shape of one side when it is split.

  The connecting portion 13C has a top portion 17C at the center portion in the arrow X direction and has leg portions 18C and 18C on both sides thereof, and is formed over the entire length in the arrow Z direction. The flat portion 14C is formed flat over the entire length in the arrow Z direction.

  Further, flange portions 12C and 12C are integrally formed at both end portions in the arrow X direction of the connecting portion 13C, in other words, at both end portions in the circumferential direction of the connecting portion 13C as viewed in the Z direction.

  The pair of flange portions 12C and 12C extend outward in the arrow X direction (on the side opposite to the top portion 17C in the arrow X direction) and extend over the entire length in the arrow Z direction. The flange portion 12C is joined and fixed to the inner surface 2a of the base wall 2B of the hat-shaped member 2 along the arrow Z direction at a plurality of spot weld portions Sb (in FIG. 10, spot welding of the flange 12C on the front side of the paper surface). Only the part Sb is shown).

  Further, flange-shaped reinforcing portions 22 (ribs) are formed at both ends of the connecting portion 13C in the arrow Z direction (in FIG. 10, only the reinforcing portion 22 of the flange 12C on the front side of the drawing is shown).

  The reinforcing portion 22 is formed to protrude in a flange shape toward the internal space (diameter inside) of the connecting portion 13C at both end portions in the arrow Z direction of the connecting portion 13C, and both end portions in the arrow Z direction of the connecting portion 13C. It extends over almost the whole of each edge.

  In addition, although the reinforcement part 22 was formed in the both ends of the arrow Z direction of the connection part 13C in this example, you may form it only in either one end of the arrow Z direction of the connection part 13C.

  Furthermore, the pair of leg portions 18C, 18C provided in the connecting portion 13C is formed with a bead 23 (convex rib, thick portion) protruding in a convex shape from the outer peripheral surface of the leg portions 18C, 18C. (Only the bead 23 on the front side of the paper is shown in FIG. 10). The bead 23 is disposed at each of the three leg portions 18C and 18C on both sides in the direction of the arrow X, ie, an intermediate position in the Z direction and both side positions, and connects the top portion 17C and the flange portion 12C, respectively. It extends along the extending direction of the leg 18C.

  The frame member 1C of the fourth embodiment is formed in a curved shape in which the connecting portion 13C is curved only when viewed from an orthogonal sectional view of the closed section 4 in the arrow Z direction (longitudinal direction). A flange-shaped reinforcing portion 22 is formed at the end in the direction.

  According to the above configuration, the vibration damping effect can be enhanced by further increasing the rigidity by the reinforcing portion 22.

  A frame member 1C according to the fourth embodiment has a bead 23 formed on a connecting portion 13C.

  According to the said structure, rigidity can further be improved with the bead 23, and it becomes possible to raise a vibration damping effect by this.

  Furthermore, the frame member 1C of the fourth embodiment is formed with the flange portions 12C and 12C at both end portions (both end portions in the arrow X direction) of the connecting portion 13C in the cross-sectional view, so that the vibration damping member particularly for the diamond mode 21 can be further promoted to enhance the vibration damping effect.

  Further, the frame members 1, 1A, 1B, and 1C of the first to fourth embodiments described above are applied to the front side frame, and the reinforcing bodies 10, 10A, 10B, and 10C are provided on the vehicle rear side near the engine mount in the front-rear direction. Since the provided configuration is employed, vibration transmitted from the engine via the engine mount at a position closer to the vibration generation source (upstream side) can be efficiently suppressed.

The present invention is not limited to the configuration of the above-described embodiment, and can be formed in various embodiments.
The reinforcing body provided in the vehicle body rigid structure of the present invention is not limited to being provided around the engine mount member mounting portion, but may be provided around the mount member mounting portion for a subframe (cross member) that supports the pivot of the suspension arm. .

  Furthermore, the vehicle body rigid structure of the present invention is not limited to being employed in the front side frame, and may be applied to other frame members such as a floor frame, a side sill, a pillar, a roof side rail, and a floor cross member.

  In the present embodiment of the present invention, the number of rigid coupling portions, that is, the number of flange portions and spot welding locations is three, but the number of rigid coupling portions, flange portions and spot welding locations is limited to the number of examples. It is not something.

  Moreover, in embodiment mentioned above, while joining the vibration damping member 21 to the inner surface 2a of the hat-shaped member 2, and joining the flange parts 12 and 12A to the inner surface 3a of the panel member 3 in 1st, 2nd embodiment. In the third and fourth embodiments, the vibration damping member 21 is joined to the inner surface 3a of the panel member 3, and the flange portions 12B, 12C are joined to the inner surfaces 2a, 2b, 2d of the hat-shaped member 2. Not only the form but also the vibration damping member and the flange portion may be joined to either side of the hat-shaped member 2 and the panel member 3 as long as they are joined to different vehicle body constituent members.

  As described above, the present invention is useful for a vehicle body structure of a vehicle having a reinforcing body joined to an inner surface of a closed cross section formed by a vehicle body constituent member, for example.

1, 1A, 1B, 1C ... Frame member (body structure)
2 ... Hat-shaped member (vehicle body component)
2a: inner surface of the base wall of the hat-shaped member (the inner surface of the closed cross section, the facing surface of the third and fourth embodiments)
2c, 2d ... non-facing surface 3 ... panel member (vehicle body component)
3a ... inner surface of panel member (inner surface of closed cross section, damping member joint surface, opposing surface of first and second embodiments)
4 ... Closed section 10, 10A, 10B, 10C ... Reinforcing body 12 (12f, 12r), 12A, 12B, 12C ... Flange 12Ba, 12Bb ... Flange (first flange)
12Bc, 12Bd ... Flange (second flange)
13, 13 </ b> A, 13 </ b> B, 13 </ b> C... Connecting part 14, 14 </ b> A, 14 </ b> B, 14 </ b> C.

Claims (7)

A vehicle body structure having a reinforcing body joined to an inner surface of a closed cross section formed by a vehicle body component,
The joint between the inner surface of the closed section and the reinforcing body has a rigid coupling portion and a soft coupling portion,
The reinforcing body has at least two flange portions joined to the inner surface of the closed cross-section portion, and a connecting portion that connects these flange portions,
The rigid coupling portion is formed by joining the connecting portion to the inner surface of the closed cross-section portion via the flange portion,
The flexible coupling portion is formed by joining so as to sandwich a vibration damping member between the coupling portion and the inner surface of the closed cross-section portion,
A vehicle body structure in which the connecting portion is formed of a spherical surface or a curved surface. A flat portion is formed at a portion of the flexible coupling portion facing the inner surface of the closed cross-section portion of the connecting portion, and the vibration damping member between the flat portion and the inner surface of the closed cross-section portion is sandwiched between the flat portion and the inner surface of the closed cross-section portion. The vehicle body structure according to claim 1, which is configured. The vehicle body structure according to claim 2, wherein the vibration damping member is disposed so as to include the planar portion in a plan view and to have a larger area than the planar portion. The closed cross section is formed by at least two vehicle body components,
The vehicle body structure according to any one of claims 1 to 3, wherein the flange portion and the vibration damping member are joined to each of the different vehicle body constituent members. A plurality of inner surfaces of the closed cross section constituting the closed cross section are provided with a damping member joining surface for joining the vibration damping member, a facing surface facing the damping member joining surface, and not facing the damping member joining surface. A non-facing surface,
The facing surface and the non-facing surface are composed of the same vehicle body constituting member,
The damping member joint surface is constituted by another vehicle body constituent member different from the vehicle body constituent member,
The vehicle body structure according to claim 4, wherein the flange portion includes a first flange portion joined to the facing surface and a second flange portion joined to the non-facing surface. The connecting portion is formed in a curved shape that is curved only when viewed from a cross-sectional view in the longitudinal direction of the closed cross-section portion,
The vehicle body structure according to any one of claims 1 to 5, wherein a flange-shaped reinforcing portion is formed at an end portion in a longitudinal direction of the connecting portion. The vehicle body structure according to any one of claims 1 to 6, wherein a bead is formed in the connecting portion.

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