JP5983463B2 - Vehicle body structure - Google Patents

Description

  The present invention relates to a vehicle body structure of a vehicle, and more specifically, includes one or more vehicle body constituent members forming a closed cross-section portion, and a reinforcing body disposed in the closed cross-section portion and joined to the vehicle body constituent member. The present invention relates to a vehicle body structure.

In general, 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 such a vehicle body structural member having a closed cross-section, various techniques are known that are configured to reduce vibration transmitted to the vehicle body structural member in order to improve riding comfort performance while being lightweight. .

  For example, Patent Document 1 discloses a partition wall member (so-called partition wall member) in which a closed cross-section portion including a frame member (frame member) having a cross-sectional hat shape and a panel member (secondary material) is provided, and a bead is integrally formed in the closed cross-section portion. And a flange portion formed integrally with the partition wall member and an inner wall of the frame member having a hat-shaped cross section to increase the strength and rigidity of the frame member.

  In the conventional structure disclosed in Patent Document 1, the above-described partition wall member (node member) suppresses the collapse of the cross section of the closed cross section, thereby increasing the rigidity of the frame member. However, it is still not sufficient, and there is a problem that vibration cannot be effectively suppressed.

JP 2006-131125 A

  Therefore, the present invention can effectively suppress vibration while ensuring rigidity. In particular, the present invention not only attenuates vibrations in torsion mode and rhombus mode (cross-section rhombus deformation by torsion mode), but also in bending mode. An object of the present invention is to provide a vehicle body structure that can enhance the vibration damping effect by attenuating vibration.

A vehicle body structure according to the present invention includes one or more vehicle body constituent members that form a closed cross section, and a reinforcing body that is disposed in the closed cross section and joined to the vehicle body constituent member. In the vehicle body structure, a joint portion between the vehicle body constituent member and the reinforcing body includes a rigid coupling portion coupled in a state of being in contact with each other, and a flexible coupling portion, and the flexible coupling portion includes: A flexible coupling flange portion formed so as to be orthogonal to the closed cross-section direction of the closed cross-section portion and substantially parallel to one inner wall of the closed cross-section portion is coupled to the vehicle body component member via a damping member. The length of the flexible coupling flange portion in the direction perpendicular to the closed cross-sectional direction of the closed cross-sectional portion is longer than the length of the closed cross-sectional portion in the closed cross-sectional direction, A longitudinally extending in a direction substantially perpendicular to the closed cross-sectional direction of the closed cross-sectional portion A lunge portion or a bead portion is formed, the first vertical wall portion extending in parallel to the closed cross-sectional direction of the closed cross-sectional portion from the flexible coupling flange portion, and extending in parallel to the inner wall of the closed cross-sectional portion from the first vertical wall portion, a rigid coupling flange to be coupled in contact with the inner wall, the provided, the damping member is disposed left and right side portions in the longitudinal direction in the center of the four corners and flexible coupling flange of the flexible joint flange It is a thing.
The above-described vehicle body constituting member may be set to a vehicle frame such as a floor frame, a side sill, a front pillar, a center pillar, a rear pillar, a roof side rail, and a floor cross member.
Moreover, you may comprise the above-mentioned rigid coupling part by the fastening joining by fastening members, such as welding joining by spot welding etc., the adhesive joining by an adhesive agent, and a volt | bolt and a nut.

According to the said structure, since the reinforcement body is couple | bonded with the closed cross-section part of the vehicle body structural member by the said rigid coupling part, the rigidity of a vehicle body structural member can be ensured.
Further, the length of the flexible coupling flange portion in the direction orthogonal to the closed cross-section portion is formed longer than the length of the closed cross-section direction, and a damping member (details) is provided between the flexible coupling flange portion and the vehicle body constituting member. Since the flexible coupling portion and the vehicle body constituent member are coupled (flexible coupling) via the vibration damping member), the vibration damping effect in the bending mode can be enhanced in addition to the torsion mode and the rhombus mode.
In particular, the damping member can obtain a damping ability by the shearing force, and if the damping member bends in conjunction with the vehicle body constituent member, the damping effect cannot be obtained. Since the above-described vertical flange portion or bead portion is formed and bending of the flexible coupling flange portion is suppressed by the vertical flange portion or the bead portion, the damping ability of the damping member can be sufficiently ensured, and the vibration damping effect can be enhanced. .

  A first vertical wall portion extending in parallel with the closed cross-section direction of the closed cross-section portion from the flexible coupling flange portion, and extending in parallel with the inner wall of the closed cross-section portion from the first vertical wall portion and in contact with the inner wall In addition to the torsion mode and the rhombus mode, the bending mode can be achieved with a simple configuration while suppressing the collapse of the cross section of the closed cross section at the first vertical wall portion. The vibration damping effect can be enhanced.

  In one embodiment of the present invention, the reinforcing body includes a second vertical wall portion extending in parallel to the closed cross-sectional direction of the closed cross-sectional portion from the flexible coupling flange portion on the side opposite to the first vertical wall portion, A rigid coupling flange portion extending in parallel with the inner wall of the closed cross-section portion from the second vertical wall portion and coupled in a state of being in contact with the other inner wall.

The above configuration has the following effects.
If the support strength of the flexible joint portion is too low, a sufficient damping effect cannot be obtained. However, the flexible joint portion can be favorably supported by both the first vertical wall portion and the second vertical wall portion. As a result, a favorable shearing force acts on the damping member, so that a sufficient damping effect can be ensured.

  In one embodiment of the present invention, the vertical flange portion is formed by bending an end portion in the closed cross-sectional direction of the closed cross-sectional portion of the flexible coupling flange portion.

  According to the above configuration, the end portion of the flexible coupling flange portion is bent to integrally form the vertical flange portion, so that the number of parts is not increased, and the torsional mode and the rhombus mode are achieved with a simple configuration. In addition, the vibration damping effect in the bending mode can be enhanced.

  In one embodiment of the present invention, the bead portion is formed at substantially the center in the width direction of the closed cross-sectional portion of the flexible coupling flange portion.

  According to this invention, the joint portion between the vehicle body structural member and the reinforcing body has the rigid joint portion and the soft joint portion that are joined in contact with each other, and the soft joint portion is closed. By being coupled via a damping member between the flexible coupling flange portion formed so as to be orthogonal to the closed cross-sectional direction of the cross-sectional portion and substantially parallel to one inner wall of the closed cross-sectional portion, and the vehicle body constituent member The length of the flexible coupling flange portion in the direction orthogonal to the closed cross-sectional direction of the closed cross-sectional portion is longer than the length of the closed cross-sectional portion in the closed cross-sectional direction, and the flexible coupling flange portion Since the vertical flange portion or bead portion extending in a direction substantially orthogonal to the closed cross-sectional direction of the closed cross-sectional portion is formed, vibration can be effectively suppressed while securing rigidity, and in particular, torsion mode and rhombus In addition to damping mode vibration, bending mode By decays vibrations de, there is an effect that it is possible to enhance the vibration damping effect.

The perspective view which shows the vehicle body structure of a vehicle 1 is a cross-sectional view taken along line AA in FIG. BB sectional view taken on line in FIG. 1 is an enlarged perspective view of the main part of FIG. Illustration in bending mode The perspective view which shows the Example of the vehicle body structure of a vehicle The perspective view which shows the other Example of the vehicle body structure of a vehicle The perspective view which shows the further another Example of the vehicle body structure of a vehicle The perspective view which shows the further another Example of the vehicle body structure of a vehicle

The objective is to effectively suppress vibration while ensuring rigidity, and in particular to not only attenuate torsional and diamond-mode vibrations but also bending-mode vibrations to enhance the vibration damping effect. A vehicle body structure of a vehicle having one or more vehicle body components forming a cross section and a reinforcing body disposed in the closed cross section and joined to the vehicle body members. The joint portion with the reinforcing body has a rigid joint portion and a soft joint portion joined in contact with each other, and the soft joint portion is orthogonal to the closed cross-sectional direction of the closed cross-section portion. The flexible coupling flange portion formed substantially parallel to one inner wall of the closed cross-section portion and the vehicle body component member are coupled via a damping member, and the flexible coupling flange portion is closed. Length in the direction perpendicular to the closed section direction of the section Is formed longer than the length of the closed cross-section portion in the closed cross-section direction, and the flexible flange portion is formed with a vertical flange portion or a bead portion extending in a direction substantially orthogonal to the closed cross-section direction of the closed cross-section portion. A first vertical wall portion extending in parallel with the closed cross-section direction of the closed cross-section portion from the flexible coupling flange portion, and extending in parallel with the inner wall of the closed cross-section portion from the first vertical wall portion and in contact with the inner wall a rigid coupling flange is coupled, the provided and implemented by configuration of the damping member is disposed left and right side portions in the longitudinal direction in the center of the four corners and flexible coupling flange of the flexible coupling flange.
[Reference example]

Prior to the description of the embodiment of the present invention, the configuration of the reference example will be described in detail.
FIG. 1 is a perspective view showing the vehicle body structure, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG. FIG. 4 is an enlarged perspective view of a main part of FIG.

  In FIG. 1 to FIG. 4, a frame member 4 having a closed cross-section portion 3 formed by a cross-sectional hat-shaped member 1 and a panel member 2 as a flat plate is provided, and the frame member 4 forms a vehicle body constituting member.

The above-described cross-sectional hat-shaped member 1 includes a base wall 1B, a pair of side walls 1S, 1S continuous to the base wall 1B, and a flange portion 1F extending outward from the opposite base wall end of the side walls 1S, 1S. , 1F are integrally formed.
Moreover, although the flat flat plate member was illustrated as the above-mentioned panel member 2, the cross section may be a hat shape or a reverse hat shape member similarly to the cross-section hat-shaped member 1.

As shown in FIGS. 1 to 4, the frame member 4 described above is formed by joining the flange portions 1 </ b> F and 1 </ b> F of the cross-sectional hat-shaped member 1 and the panel member 2.
A reinforcing member 5 is provided inside a frame member 4 formed of two members (a cross-sectional hat-shaped member 1 and a panel member 2) and having a closed cross-sectional portion 3.
As shown in FIGS. 1 and 4, the reinforcing body 5 includes a flexible coupling flange portion 6 formed so as to be orthogonal to the closed section direction of the closed section 3.

Here, when the width direction of the closed section 3 is the arrow X direction in FIG. 4 and the depth direction (or height direction) of the closed section 3 is the arrow Z direction, the closed section direction of the closed section 3 is The direction of the plane including the arrow X direction and the arrow Z direction (the extending direction of the node members 11 and 21 described later), the direction orthogonal to the closed sectional direction of the closed sectional portion 3 (the direction orthogonal to the closed sectional direction) ) Is the arrow Y direction, and in this embodiment, the arrow Y direction is the longitudinal direction of the closed cross-section 3.
The above-described flexible coupling flange portion 6 is formed in a planar and substantially rectangular shape substantially parallel to the inner wall of the panel member 2 (inner wall of the closed section), and substantially the entire surface of the flexible coupling flange portion 6 and the vehicle body component member. A flexible coupling portion 7 (see FIGS. 2 and 3) is formed by coupling the two members 6 and 2 with the panel member 2 of the frame member 4 via the damping member V.
In other words, the flexible coupling portion 7 is configured by being coupled via the damping member V between the planar and substantially rectangular flexible coupling flange portion 6 and the panel member 2.

As shown in FIG. 1 and FIG. 4, reinforcing ribs 8 and 9 as vertical flange portions are formed at the left and right end portions of the flexible coupling flange portion 6 by bending the flexible coupling flange portion 6 downward at a substantially right angle. It is integrally formed. The reinforcing ribs 8 and 9 are formed to extend in the arrow Y direction. The reinforcing ribs 8 and 9 may not be joined to the inner wall of the closed cross section 3.
The flexible coupling flange portion 6 including the above-described reinforcing ribs 8 and 9 is formed such that the length in the arrow Y direction is longer than the length in the width direction of the closed cross-section portion 3 (length in the arrow X direction). Yes.
A planar first knuckle member 11 as a first vertical wall portion extending in parallel with the closed cross-section direction from one end portion of the above-described flexible coupling flange portion 6 is integrally and substantially bent at a right angle. The rigid coupling flange portions 12 and 13 extending in parallel to the left and right side walls 1S and 1S of the closed cross-section portion 3 from the left and right end portions of the first cross section 3 and the base wall 1B of the closed cross-section portion 3 extending in parallel from the lower end portion of the first knot member 11. The rigid coupling flange portion 14 is bent integrally and substantially at a right angle.
The rigid coupling flange portions 12 and 13 extend in the arrow Z direction, and the rigid coupling flange portion 14 extends in the arrow X direction.

As shown in FIGS. 2 and 3, the rigid coupling flange portion 14 below the first knot member 11 is brought into contact with the inner surface of the base wall 1 </ b> B (inner wall of the closed cross-section portion 3) of the cross-section hat-shaped member 1. 1B is joined and fixed by a plurality of spot welds a and a.
Also, as shown in FIGS. 2 and 3, the rigid coupling flange portion 12 on one side of the first node member 11 is brought into contact with the corresponding side wall 1 </ b> S inner surface (inner wall of the closed cross-section portion 3) of the cross-sectional hat member 1. These two 12 and 1S are joined and fixed by a plurality of spot welds b and b.

  Similarly, as shown in FIGS. 2 and 3, the rigid coupling flange portion 13 on the other side of the first knuckle member 11 is brought into contact with the corresponding inner surface of the side wall 1 </ b> S of the cross-sectional hat-shaped member 1. 1S is joined and fixed by a plurality of spot welds c and c.

That is, the joint portion between the closed cross-section portion 3 and the first node member 11 has a rigid joint portion that is joined in contact with each other. In this embodiment, each spot welded portion a, b, c is rigid. It forms a coupling part. In addition, the number of the welding locations by each spot welding part a, b, c is not limited to the number of illustration reference examples.
Furthermore, the flexible second flange portion 6 on the opposite side to the first joint member 11 described above, that is, the second planar wall as the second vertical wall portion extending in parallel with the closed cross-sectional direction from the other end of the flexible coupling flange portion 6. The joint member 21 is formed integrally and substantially at a right angle, and the rigid joint flange portions 22 and 23 extending in parallel to the left and right side walls 1S and 1S of the closed cross-section 3 from the left and right ends of the second joint member 21; A rigid coupling flange portion 24 extending in parallel to the base wall 1B of the closed cross-section portion 3 from the lower end portion of the two-barrel member 21 is integrally and substantially bent at a right angle.
The rigid coupling flange portions 22 and 23 extend in the arrow Z direction, and the rigid coupling flange portion 24 extends in the arrow X direction.

As shown in FIGS. 3 and 4, the rigid coupling flange portion 24 below the second node member 21 is brought into contact with the inner surface of the base wall 1 </ b> B of the cross-sectional hat-shaped member 1. , A are joined and fixed.
As shown in FIGS. 3 and 4, the rigid coupling flange portion 22 on one side of the second node member 21 is brought into contact with the corresponding inner surface of the side wall 1 </ b> S of the cross-sectional hat-shaped member 1. Are joined and fixed by a plurality of spot welds b and b.

  Similarly, as shown in FIG. 4, the rigid coupling flange portion 23 on the other side portion of the second node member 21 is brought into contact with the corresponding inner surface of the side wall 1S of the cross-sectional hat-shaped member 1, and a plurality of these both 23, 1S are provided. The spot welds c and c are joined and fixed.

That is, the joint portion between the closed cross-section portion 3 and the second node member 21 has a rigid joint portion that is joined in contact with each other. In this reference example, each spot welded portion a, b, c is rigid. It forms a coupling part. In addition, the number of the welding locations by each spot welding part a, b, c is not limited to the number of illustration reference examples.
As described above, the joint portion between the frame member 4 and the reinforcing body 5 as the above-described vehicle body constituting member is connected to the spot welded portions a, b, and c (rigid joint portions) that are joined in contact with each other, and is attenuated. It has the soft coupling | bond part 7 couple | bonded through the member V. FIG.

As shown in FIG. 3, the flexible coupling flange 6 and the first and second node members 11 and 12 are integrally formed in a substantially gate shape in a side view to form a substantially gate-shaped portion. The rigid coupling flange portions 12, 13, 14, 22, 23, and 24 are formed outside the substantially portal portion in consideration of the workability of spot welding.
As the above-mentioned rigid coupling portion, instead of the above-mentioned spot welded portions a, b, c, a fastening coupling portion such as a bolt or a nut may be used, or an adhesive joint portion using an adhesive may be used. Here, the adhesive used for the adhesive bonding of the rigid bond has a storage elastic modulus of 2000 MPa or more and a loss factor of 0.05 at a temperature of 20 ° C. and a vibration force frequency of 30 Hz. The following viscoelastic member is used.
On the other hand, as the damping member V, a viscoelastic member having a storage elastic modulus of 500 MPa or less and a loss coefficient of 0.2 or more is used under the condition that the temperature is 20 ° C. and the frequency of the excitation force is 30 Hz.

  By the way, as shown in FIG.1, FIG.2, FIG.4, the notch recessed part 11A, 21A is formed in the four corners of each 1st and 2nd node member 11,21, respectively. The notch recesses 11A and 21A avoid interference between the cross-section hat-shaped member 1 having the corner-shaped portion and the node members 11 and 21 when the respective node members 11 and 21 are disposed in the closed cross-section portion 3. When the frame member 4 is immersed in the electrodeposition tank and rust-proof coating is performed, the node members 11 and 21 are configured not to block the electrodeposition liquid.

The above reference example is configured as described above, and the operation will be described below.
The first and second joint members 11 and 21 coupled and fixed in the closed cross-section portion 3 can suppress the collapse of the cross-section of the closed cross-section portion 3 and spot welds a and b as rigid coupling portions. Since the reinforcing body 5 is coupled to the inner wall of the closed cross section 3 of the frame member 4 by c, c, the rigidity of the frame member 4 can be ensured.
Further, when the frame member 4 is torsionally deformed, the amount of torsional deformation of the four corner portions of the damping member V becomes large. Therefore, the damping member V can enhance the vibration damping effect in the torsion mode.

FIG. 5 is an explanatory diagram in the bending mode, and is an explanatory diagram in a state where both ends of the frame member 4 in the longitudinal direction (arrow Y direction) are restrained by the restraining portions 10 and 10.
The bending point α in the bending mode is when the thickness of the cross-section hat-shaped member 1 constituting the frame member 4 and the thickness of the panel member 2 are uniform in the longitudinal direction and the cross-sectional shape is uniform in the longitudinal direction. In the middle of the restraining portions 10 and 10, more specifically, the central portion.
Since the damping member V described above includes a bending mode bending point α at the center portion in the longitudinal direction of the rectangular shape, the damping member V can enhance the vibration damping effect of the bending mode.

  Here, the damping member V is capable of obtaining a damping ability due to a shearing force. When the damping member V bends in conjunction with the frame member 4, the damping ability cannot be obtained. In the reference example, the reinforcing ribs 8 and 9 are formed on the flexible coupling flange portion 6 and the bending of the flexible coupling flange portion 6 is suppressed. Therefore, the damping member V can exhibit a sufficient damping capacity. The vibration damping effect can be enhanced.

Here, it is as follows about the above-mentioned restraint part 10.
When the frame member 4 is applied to the floor cross member, the restraining portion 10 is set to the side sill and the tunnel portion, and when the frame member 4 is applied to the center pillar, the restraining portion 10 includes the roof side rail and the side sill. When the frame member 4 is applied to the dash cross member, the restraining portion 10 is set to the left and right hinge pillars, and thus the restraining portion 10 is used for other vehicle bodies that restrain both ends of the frame member 4 in the longitudinal direction. It is set to the member.

  As described above, the vehicle body structure of the vehicle of the reference example shown in FIGS. 1 to 5 has one or two or more vehicle body constituent members (a frame composed of the cross-sectional hat-shaped member 1 and the panel member 2) forming the closed cross-section portion 3. A vehicle body structure including a member 4) and a reinforcing body 5 disposed in the closed cross section 3 and joined to the vehicle body component (frame member 4). The joint portion between the frame member 4) and the reinforcing body 5 has a rigid joint portion (see spot welds a, b, and c) joined in contact with each other, and a soft joint portion 7, The flexible coupling portion 7 includes a flexible coupling flange portion 6 formed so as to be orthogonal to the closed sectional direction of the closed sectional portion 3 (see the arrow Y direction) and substantially parallel to one inner wall of the closed sectional portion 3; To be coupled to the vehicle body constituent member (frame member 4) via a damping member V The length of the flexible coupling flange portion 6 in the direction perpendicular to the closed cross-sectional direction of the closed cross-sectional portion 3 (the length in the arrow Y direction) is the length of the closed cross-sectional portion 3 in the closed cross-sectional direction ( A vertical flange portion (see reinforcing ribs 8 and 9) is formed which is longer than the length of the arrow X direction and extends in a direction substantially perpendicular to the closed cross-section direction of the closed cross-section portion 3 of the flexible coupling flange portion 6. (See FIGS. 1 and 4).

According to this configuration, since the reinforcing body 5 is coupled to the closed cross-section portion 3 of the vehicle body component (frame member 4) by the rigid coupling portions (spot welds a, b, c), the vehicle body component (frame The rigidity of the member 4) can be ensured.
Furthermore, the length (the length in the arrow Y direction) in the direction perpendicular to the closed section direction of the closed section 3 of the flexible coupling flange portion 6 is the length in the closed section direction (the length in the arrow X direction). ) And the flexible coupling portion 7 and the vehicle body configuration via a damping member V (specifically, a vibration damping member) between the flexible coupling flange portion 6 and the vehicle body constituent member (frame member 4). Since the member (frame member 4) is coupled (softly coupled), the vibration damping effect in the bending mode can be enhanced in addition to the torsion mode and the rhombus mode.
In particular, the damping member V can obtain a damping ability by the action of a shearing force. If the damping member V bends in conjunction with a vehicle body constituent member, the damping effect cannot be obtained. The above-described vertical flange portion (reinforcing ribs 8 and 9) is formed and the bending of the flexible coupling flange portion 6 is suppressed by the vertical flange portions (reinforcing ribs 8 and 9). Sufficiently can be secured and the vibration damping effect can be enhanced.
The reinforcing body 5 includes the flexible coupling flange portion 6 and a first vertical wall portion (see the first knuckle member 11) extending from the flexible coupling flange portion 6 in parallel to the closed sectional direction of the closed sectional portion 3. A rigid member that extends in parallel from the first vertical wall portion (first joint member 11) to another inner wall different from the one inner wall of the closed cross-section portion 3 and is in contact with the other inner wall. The coupling flange portions 12, 13, and 14 are formed (see FIGS. 1 and 4).

According to this configuration, the vibration of the bending mode is added to the torsion mode and the rhombus mode with a simple configuration while suppressing the collapse of the cross section of the closed cross section 3 by the first vertical wall portion (first node member 11). The attenuation effect can be enhanced.
Further, the reinforcing body 5 is a second vertical wall portion extending in parallel with the closed cross-sectional direction of the closed cross-sectional portion 3 from the flexible coupling flange portion 6 on the opposite side to the first vertical wall portion (first joint member 11). The (second joint member 21) and the second vertical wall portion extend in parallel to another inner wall different from the one inner wall of the closed cross-section portion 3, and are coupled in contact with the other inner wall. Rigid coupling flange portions 22, 23, 24 are further provided (see FIG. 4).

This configuration has the following effects.
When the supporting strength of the flexible joint portion 7 is too low, a sufficient damping effect cannot be obtained. However, the first vertical wall portion (first joint member 11) and the second vertical wall portion (second joint member 21) Thus, the soft coupling portion 7 can be supported so as to be favorably supported. As a result, a suitable shearing force acts on the damping member V, so that a sufficient damping effect can be ensured.
In addition, the vertical flange portions (reinforcing ribs 8 and 9) are formed by bending the closed cross-section direction end of the closed cross-section portion 3 of the flexible coupling flange portion 6.

  According to this configuration, since the end portion of the flexible coupling flange portion 6 is bent and the vertical flange portion (reinforcing ribs 8 and 9) is integrally formed, in addition to the torsion mode and the rhombus mode, The vibration damping effect in the bending mode can be enhanced.

FIG. 6 is a perspective view showing Embodiment 1 of the vehicle body structure of the vehicle.
In the first embodiment shown in FIG. 6, the damping members V <b> 1... Are arranged at the four corners of the substantially rectangular flexible coupling flange 6, and the damping members V <b> 2 are located at the center of the left and right side portions in the longitudinal direction of the flexible coupling flange 6. , V2 are arranged, and a total of six damping members V1, V2 are used.
If comprised in this way, the vibration damping effect of a torsion mode, a rhombus mode, and a bending mode can be heightened with the required minimum 6 damping members V1 and V2.
In particular, the four damping members V1 arranged at the four corners exert an effect on torsional deformation, and the two damping members V2 arranged at the center of both the left and right side parts exert an effect on bending deformation.

Also in the first embodiment, each of the above-described damping members V1 and V2 has a storage elastic modulus of 500 MPa or less and a loss factor of 0 under the condition that the temperature is 20 ° C. and the frequency of the excitation force is 30 Hz. Use two or more viscoelastic members.
Even in this configuration, the other configurations, operations, and effects are the same as in the previous reference example. Therefore, in FIG. 6, the same parts as those in FIG. Omitted.

FIG. 7 is a perspective view showing another embodiment of the vehicle body structure of the vehicle.
In the second embodiment shown in FIG. 7, instead of the reinforcing ribs 8 and 9, a bead portion 6B extending in the arrow Y direction and projecting downward is formed integrally at the approximate center of the flexible coupling flange portion 6 in the arrow X direction. Is.
In this case, the damping members may be disposed on substantially the entire surface of the flexible coupling flange portion 6 as shown by phantom lines in FIG. 7, or a total of six damping members V1, V2 as shown by solid lines in FIG. May be arranged in the same place as in the first embodiment.

  As described above, in the second embodiment shown in FIG. 7, one or more vehicle body constituting members (frame member 4) that form the closed cross-section portion 3, and the vehicle body disposed in the closed cross-section portion 3. A vehicle body structure having a reinforcing body 5 joined to a constituent member (frame member 4), wherein the joint portion between the vehicle body constituent member (frame member 4) and the reinforcing body 5 abuts each other. A rigid coupling portion (see spot welds a, b, and c) and a flexible coupling portion 7 which are coupled in a state where the flexible coupling portion 7 is orthogonal to the closed sectional direction of the closed sectional portion 3 (see FIG. A damping member (V or V1) is provided between the flexible coupling flange portion 6 formed so as to be parallel to one inner wall of the closed cross-section portion 3 and the vehicle body constituent member (frame member 4). , V2) and the flexible flange portion 6 The length of the closed cross section 3 in the direction orthogonal to the closed cross section direction (the length in the arrow Y direction) is longer than the length of the closed cross section 3 in the closed cross section direction (the length in the arrow X direction). A bead portion 6B extending in a direction (arrow Y direction) substantially orthogonal to the closed cross-sectional direction of the closed cross-sectional portion 3 of the flexible coupling flange portion 6 is formed (see FIG. 7).

According to this configuration, since the reinforcing body 5 is coupled to the closed cross-section portion 3 of the vehicle body component (frame member 4) by the rigid coupling portions (spot welds a, b, c), the vehicle body component (frame member) The rigidity of 4) can be ensured.
Furthermore, the length (the length in the arrow Y direction) in the direction perpendicular to the closed section direction of the closed section 3 of the flexible coupling flange portion 6 is the length in the closed section direction (the length in the arrow X direction). ), The flexible coupling portion 7 and the vehicle body component member (V or V1, V2) are interposed between the flexible coupling flange portion 6 and the vehicle body structural member (frame member 4). Since the frame member 4) is coupled (softly coupled), the vibration damping effect in the bending mode can be enhanced in addition to the torsional mode and the diamond mode.
In particular, the damping member can obtain a damping performance by the shearing force, and if the damping member is bent in conjunction with the vehicle body constituting member, the damping effect cannot be obtained. Since the above-described bead portion 6B is formed, and the bending of the flexible coupling flange portion 6 is suppressed by the bead portion 6B, the damping ability of the damping member (V or V1, V2) can be sufficiently secured, and the vibration damping effect is enhanced. Can do.

  In Example 2 shown in FIG. 7 as well, other configurations, operations, and effects are the same as in the previous reference example. Therefore, in FIG. Although the detailed explanation is omitted, a plurality of bead portions 6B protruding downward may be formed along the arrow Y direction.

FIG. 8 is a perspective view showing still another embodiment of the vehicle body structure of the vehicle.
In the third embodiment shown in FIG. 8, the second joint member 21 and the rigid coupling flange portions 22 to 24 are omitted from the reference example shown in FIG. 4 or FIG. 6, and the flexible coupling flange portion 6 is rigidly coupled. The first joint member 11 having the flange portions 12, 13, and 14 is configured to be cantilevered.

In this case, the damping members may be disposed substantially in front of the flexible coupling flange portion 6 as shown by phantom lines in FIG. 8, or a total of six damping members V1 and V2 as shown by solid lines in FIG. May be arranged at the four corners of the substantially rectangular flexible coupling flange 6 and at the center of the left and right sides in the longitudinal direction.
Even if configured in this way, the same operations and effects as those of the previous reference example and the respective embodiments can be obtained. Therefore, in FIG. Omitted.

FIG. 9 is a perspective view showing still another embodiment of the vehicle body structure of the vehicle.
In this Example 4 shown in FIG. 9, when the flexible coupling flange part 6 is seen from the open side of the cross-sectional hat-shaped member 1, both end dimensions in the arrow Y direction are the maximum, and the center part in the arrow Y direction is the minimum dimension. In addition to being formed into a so-called drum shape, the reinforcing ribs 8 and 9 extending in the arrow Y direction while being bent in the arrow X direction by bending the end portion of the drum-shaped flexible coupling flange portion 6 are integrally formed.
In this case, the length of the reinforcing ribs 8 and 9 farthest from the four corners of the flexible coupling flange portion 6 in the center of the arrow Y direction in the arrow Z direction is maximized with respect to the other portions of the reinforcing ribs 8 and 9. These reinforcing ribs 8 and 9 are configured to secure the necessary rigidity of the flexible coupling flange portion 6.

In the fourth embodiment shown in FIG. 9, a total of four damping members V1... Are arranged at the four corners of the drum-shaped flexible coupling flange portion 6, and one damping member V3 is disposed at the center of the flexible coupling flange portion 6. A total of five damping members V1, V3 are used.
The four damping members V1 arranged at the four corners exert an effect on torsional deformation, and the one damping member V3 arranged at the central portion exerts an effect on bending deformation.
In place of the configuration using a total of five damping members V1 and V3, as shown in phantom lines in FIG. 9, one damping member V4 disposed on substantially the entire surface of the drum-shaped flexible coupling flange portion 6 may be used. Good.
Also in the fourth embodiment shown in FIG. 9, the same operations and effects as in the previous embodiment are achieved. Therefore, in FIG. 9, the same parts as those in the previous figure are denoted by the same reference numerals, and detailed description thereof is omitted. To do.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The vehicle body constituting member of the present invention corresponds to the frame member 4 of the embodiment,
Similarly,
The vertical flange corresponds to the reinforcing ribs 8 and 9,
The first vertical wall portion corresponds to the first knuckle member 11,
The second vertical wall portion corresponds to the second knuckle member 21,
The rigid joints correspond to the spot welds a, b, c,
The present invention is not limited to the configuration of the above-described embodiment.

For example, in the above embodiment, the frame member 4 is configured by the cross-sectional hat-shaped member 1 and the panel member 2, but this frame member may be configured by combining the cross-sectional hat-shaped member and the cross-sectional inverted hat-shaped member. Good.
When a plurality of bending mode bending points α (see FIG. 5) are predicted to occur in the frame member, a plurality of reinforcing bodies and damping members are provided corresponding to the respective bending points of the plurality of bending modes. It may be provided.
Furthermore, the vehicle body structure of the vehicle of the present invention includes a front side frame, a rear side frame, a floor cross member, a dash cross member, a tunnel member, a side sill, a front pillar, a center pillar, a rear pillar, a quarter pillar, a hinge pillar, a roof side rail, and a floor frame. It can apply to each part of vehicles, such as.

  As described above, the present invention includes one or more vehicle body constituent members that form a closed cross-section portion, and a reinforcing body that is disposed in the closed cross-section portion and joined to the vehicle body constituent member. This is useful for the body structure of a simple vehicle.

3 ... Closed section 4 ... Frame member (vehicle body component)
5 ... Reinforcing body 6 ... Flexible coupling flange portion 6B ... Bead portion 7 ... Flexible coupling portion 8, 9 ... Reinforcing rib (vertical flange portion)
11 ... 1st clause member (1st vertical wall part)
12, 13, 14 ... Rigid coupling flange portion 21 ... Second joint member (second vertical wall portion)
22, 23, 24... Rigidly connected flange portions a, b, c... Spot welded portions (rigidly connected portions)
V, V1, V2, V3, V4 ... Damping member

Claims (4)

One or more vehicle body components forming a closed cross-section,
A vehicle body structure having a reinforcing body disposed in the closed cross section and joined to the vehicle body component,
The joint portion between the vehicle body component member and the reinforcing body has a rigid coupling portion coupled in a state of being in contact with each other, and a flexible coupling portion,
The flexible coupling portion is a damping member between the flexible coupling flange portion formed so as to be orthogonal to the closed sectional direction of the closed sectional portion and substantially parallel to one inner wall of the closed sectional portion, and the vehicle body component member Is composed by being coupled through
The length in the direction perpendicular to the closed cross-sectional direction of the closed cross-sectional portion of the flexible coupling flange is formed to be longer than the length of the closed cross-sectional portion in the closed cross-sectional direction,
A vertical flange portion or a bead portion extending in a direction substantially orthogonal to the closed cross-sectional direction of the closed cross-section portion is formed on the flexible coupling flange portion,
A first vertical wall portion extending in parallel with the closed cross-section direction of the closed cross-section portion from the flexible coupling flange portion;
A rigid coupling flange portion extending in parallel with the inner wall of the closed cross-sectional portion from the first vertical wall portion and coupled in contact with the inner wall;
Body structure of a vehicle in the longitudinal direction of the left and right side portions center the damping member is disposed in the four corners and flexible coupling flange of the flexible coupling flange. A second vertical wall portion extending in parallel with the closed cross-section direction of the closed cross-section portion from the flexible coupling flange portion on the opposite side to the first vertical wall portion;
The vehicle body of claim 1, further comprising: a rigid coupling flange portion extending in parallel with the inner wall of the closed cross-section portion from the second vertical wall portion and coupled in a state of being in contact with the other inner wall. Construction. The vehicle body structure according to claim 1 or 2, wherein the vertical flange portion is formed by bending an end portion of the closed cross-section portion of the flexible coupling flange portion in a closed cross-section direction. The vehicle body structure according to claim 1, wherein the bead portion is formed at a substantially center in the width direction of the closed cross-section portion of the flexible coupling flange portion.

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