JP2017081189A - Vehicle body structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a riding comfort by suppressing vibration transmitted to an occupant in a cabin while securing and enhancing rigidity.SOLUTION: This vehicle body structure of a vehicle comprises a node member 70 in a closed cross section part CS which is defined by one or two or more vehicle body constituent members 20, 60. The node member 70 has: a main body part 71 which defines the closed cross section part CS in its longitudinal direction; a first flange part 72 which extends along one longitudinal direction from the main body part 71 via a bent part 76, and is joined to a first face of the closed cross section part CS via a vibration attenuation member 80; and second flange parts 73, 74 which extend along the other longitudinal direction from an anti-first flange part side region of the bent part 76 in the main body part 71, and are joined to second faces 62, 63 which adjoin the first face of the closed cross section part CS. Edges 73a, 74a of the second flange parts 73, 74 at the first face side extend while being inclined so as to approximate the first face of the closed cross section part CS from the main body part 71.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vehicle body structure of a vehicle, and more particularly to a closed cross-section structure of the vehicle body, and belongs to the technical field of the vehicle body structure of a vehicle.

  In vehicles such as automobiles, it is required to increase the rigidity of the vehicle body structure in order to improve riding comfort and safety. In order to improve riding comfort, it has been studied to provide a member that attenuates vibration between each part of the vehicle, which is a vibration generation source, and the passenger compartment.

  For example, in the vehicle body structure disclosed in Patent Document 1, a node member is provided in a closed cross-section defined by a floor panel and a cross-sectional hat-shaped frame member provided on the lower side of the floor panel. A vibration damping member is interposed in a part of the joint with the closed cross section. In this way, the rigidity of the frame member or the floor panel to which the frame member is joined is enhanced, and the strain is intensively absorbed by the joint portion where the vibration damping member is interposed, so that the vehicle can be separated from the vibration source. The transmission of vibration to is suppressed.

JP 2013-049376 A

  According to the vehicle body structure described in Patent Document 1, it is possible to attenuate the vibration that is input from the outside of the closed section and transmitted to the passenger compartment while maintaining high rigidity of the vehicle body structure. However, in order for the vibration damping member of the node member to exhibit high vibration damping performance, it is necessary to further optimize the arrangement structure of the node member in the closed cross section.

  It is an object of the present invention to provide a vehicle body structure for a vehicle that improves the ride comfort by suppressing vibration transmitted to an occupant in a vehicle cabin while ensuring and improving rigidity.

  In order to solve the above problems, the present invention is configured as follows.

The invention according to claim 1 is a vehicle body structure for a vehicle including a node member in a closed cross section defined by one or more vehicle body components.
The node member extends along one side of the longitudinal direction from the main body part through the bent part, and extends along the longitudinal direction from the main body part through the bending part. A first flange portion joined to the first surface, and extends along the other side in the longitudinal direction from a portion on the side opposite to the first flange portion of the bent portion in the main body portion, and is adjacent to the first surface of the closed cross-section portion A second flange portion joined to the second surface,
The edge on the first surface side of the second flange portion extends from the main body portion so as to be inclined with respect to the first surface of the closed cross section.

The invention according to claim 2 is the invention according to claim 1,
A truss shape is defined in a side view by an edge portion on the first surface side of the main body portion, the second flange portion, and a first surface of the closed cross-sectional portion.

The invention according to claim 3 is the invention according to claim 1 or 2,
The closed cross-section is defined by a floor panel and a tunnel-side tunnel side frame that is joined to one surface of the floor panel and extends in one of the vehicle body longitudinal directions,
A floor cross member extending in the vehicle width direction is joined to the other surface of the floor panel,
The floor cross member has a flange portion extending in one of the vehicle body longitudinal directions,
The first flange portion of the node member overlaps with the flange portion of the floor cross member in the longitudinal direction of the vehicle body.

  According to the first aspect of the present invention, since the vibration damping member is provided between the first flange portion of the node member disposed in the closed cross-section portion and the first surface of the closed cross-section portion, the closed cross-section is provided. The vibration input from the outside of the unit is absorbed and damped by the distortion of the vibration damping member. Thereby, the vibration transmitted to the passenger | crew of a vehicle interior can be suppressed and riding comfort can be improved.

  In particular, the second flange portion joined to the second surface of the closed cross section extends from the opposite side portion of the bent portion of the main body portion to the first surface of the closed cross section. Thus, the second flange portion functions as a support portion against distortion of the bent portion. As a result, the rigidity around the bent portion that is likely to be distorted by vibration is improved, and the strain is more concentrated on the vibration damping member. In this manner, the vibration damping member can exhibit high damping performance while improving rigidity by disposing the node member.

  According to the second aspect of the present invention, the truss shape is defined in a side view by the body portion, the edge on the first surface side of the second flange portion, and the first surface of the closed cross-section portion, whereby the second flange Since the portion functions more effectively as a support portion against distortion of the bent portion, the effect of claim 1 can be enhanced.

  According to the third aspect of the present invention, the first flange portion provided with the vibration damping member overlaps the flange portion of the floor cross member in the longitudinal direction of the vehicle body with the floor panel interposed therebetween, so that the vibration damping member Since the peripheral rigidity becomes higher, strain can be more concentrated on the vibration damping member, and the effect of claim 1 can be enhanced.

It is a figure which shows the bottom part of the compartment which applied the vehicle body structure of the vehicle which concerns on embodiment of this invention. It is sectional drawing along the AA line of FIG. It is sectional drawing along the BB line of FIG. FIG. 3 is a partially enlarged view of FIG. 2. It is a perspective view shown in the state where a node member was joined to a tunnel side frame. It is a front view which shows a node member alone. It is a top view which shows a node member alone. It is a figure which shows the advantage at the time of manufacturing the vehicle body structure of the vehicle which concerns on embodiment of this invention.

  Hereinafter, a vehicle body structure of a vehicle according to an embodiment of the present invention will be described with reference to the accompanying drawings. In the following description, terms indicating directions such as “front”, “rear”, “left”, and “right” are directions when the traveling direction of the vehicle is “front”, unless otherwise specified. Shall be pointed to.

  FIG. 1 is a view showing a bottom portion of a passenger compartment to which a vehicle body structure of a vehicle according to an embodiment of the present invention is applied, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. It is sectional drawing along the BB line of 1. FIG. 1 to 3 show only the vehicle body structure provided on the left side of the bottom of the passenger compartment, the same vehicle body structure is also provided on the right side.

  As shown in FIG. 1, a floor panel 10 that defines a bottom surface of a passenger compartment includes a tunnel constituent member 11 and a panel member 12 that are joined to each other. The tunnel constituent member 11 extends in the front-rear direction at the center of the floor panel 10 to constitute a tunnel portion, and the panel member 12 constitutes the other portion of the floor panel 10. The tunnel constituent member 11 has a flange-like flat portion 13 extending outward in the vehicle width direction, and is joined to the panel member 12 by the flat portion 13. Hereinafter, unless there is a special description, when the members are joined, it is assumed that the joining is performed by spot welding.

  On the upper surface of the floor panel 10, from the front side of the vehicle body, 2 Cross member 21, No. 2 2.5 cross member 22 and no. Three cross members 23 are spaced apart from each other in the front-rear direction and extend in the vehicle width direction. The cross members 21, 22 and 23 are joined to the tunnel constituent member 11 on the inner side of the vehicle, and are joined to side sills 30 extending in the front-rear direction of the vehicle body on the left and right sides of the floor panel 10 on the outer side of the vehicle.

  As shown in FIG. The 2.5 cross member 22 has two cross-sectional hat-shaped portions 22a and 22b that open downward in the vehicle body. No. The 2.5 cross member 22 has a flange portion 22c extending from the cross-sectional hat-shaped portion 22a on the front side of the vehicle body, and is joined to the panel member 12 by the flange portion 22c. No. The 2.5 cross member 22 has a flange portion 22d at the inner end of the vehicle, and is joined to the tunnel constituent member 11 by the flange portion 22d. Although not shown, no. The 2.5 cross member 22 has a flange portion at the outer end portion of the vehicle, and is joined to the side sill 30 at the flange portion.

  As shown in FIG. The 2.5 cross member 22 is provided with a seat rail mounting member 50 for mounting the seat rail 40. The seat rail mounting member 50 is formed in a substantially right-angle cross section, and the flange components 50a and 50b provided at both ends in the vehicle width direction, respectively, the tunnel component member 11 and the No. 2.5 It is joined to the cross member 22. A bolt insertion hole 51 is formed in the seat rail mounting member 50 so that the seat belt mounting bolt BT is inserted, and a nut NT fastened to the bolt BT is joined. The seat rail 40 is fixed to the seat rail mounting member 50 using bolts BT and nuts NT.

  As shown in FIGS. 2 and 3, a tunnel side frame 60 extending in the longitudinal direction of the vehicle body is joined to the lower surface of the floor panel 10. Hereinafter, it may be referred to as the lower surface of the floor panel 10 regardless of whether it is the lower surface of the tunnel constituent member 11 or the lower surface of the panel member 12. The tunnel side frame 60 is formed in a cross-sectional hat shape that opens upward in the vehicle body. As shown in FIG. 3, the tunnel side frame 60 has a lower surface 61, a side surface 62 on the vehicle inner side, a side surface 63 on the vehicle outer side, a flange portion 64 on the vehicle inner side, and a flange portion 65 on the vehicle outer side. The flange portion 64 on the inner side of the tunnel side frame 60 is joined to the tunnel constituting member 11 of the floor panel 10, and the flange portion 65 on the outer side of the vehicle is joined to the panel member 12.

  In the present embodiment, a closed cross section CS having a substantially square cross section is defined by a frame member constituted by the floor panel 10 and the tunnel side frame 60 which are two vehicle body constituting members. Hereinafter, the upper surface, the lower surface, or the side surface of the closed section CS refers to the upper surface, the lower surface, or the side surface of the frame member. Further, the longitudinal direction of the closed section CS refers to the longitudinal direction of the frame member, that is, the longitudinal direction of the tunnel side frame 60.

  The upper surface of the closed cross section CS is defined by the lower surface of the floor panel 10, and the lower surface and side surfaces of the closed cross section CS are defined by the lower surface 61 and side surfaces 62, 63 of the tunnel side frame 60, respectively. Within the closed section CS, no. Below the 2.5 cross member 22 is provided a node member 70 having a function of suppressing vibrations generated in various parts of the vehicle such as tires and suspensions from being transmitted to the passenger compartment.

Next, the structure of the node member 70 will be described in detail with reference to FIGS. 4 and 5, the welded portion of the node member 70 to the tunnel side frame 60 is indicated by x (cross).
The node member 70 includes a main body portion 71, a first flange portion 72, two second flange portions 73 and 74, a third flange portion 75, a first bent portion 76, second bent portions 77 and 78, and a third fold. A curved portion 79 is provided. The main body 71 is provided so as to partition the closed section CS in the longitudinal direction of the tunnel side frame 60 (or the longitudinal direction of the closed section CS). The body portion 71 is inclined from the vehicle body vertical direction to the vehicle body front-rear direction so that the upper side of the body portion 71 is located in front of the vehicle body with respect to the lower side in a side view (viewed from the vehicle width direction) The portion 71, the first flange portion 72, and the third flange portion 75 have a substantially crank shape in a side view. In the center of the main body 71, a hole 71a is formed for facilitating electrodeposition coating, which will be described later, and for reducing the weight of the vehicle body structure.

  As shown in FIGS. 2 and 4, the first flange portion 72 of the node member 70 has a No. 1 plate sandwiched between the panel members 12 of the floor panel 10. 2.5 It overlaps with the flange portion 22c of the cross member 22 in the longitudinal direction of the vehicle body.

  The first flange portion 72 extends forward of the vehicle body on the upper side of the main body portion 71 (or along one longitudinal direction of the closed section CS), and the upper surface thereof faces the lower surface of the floor panel 10. A vibration damping member 80 is provided on the upper surface of the first flange portion 72 over substantially the entire surface. The first flange portion 72 is joined to the lower surface of the floor panel 10 via the vibration damping member 80, whereby a flexible coupling portion is formed between the first flange portion 72 and the closed cross-section portion CS. As will be described later, when the vibration damping member 80 is formed by applying a paste-like material to the upper surface of the first flange portion 72 and thermosetting it, the vibration damping member 80 may protrude from the upper surface of the first flange portion 72. is there.

  Of the two second flange portions 73 and 74, the second flange portion 73 is provided on the vehicle inner side, and the second flange portion 74 is provided on the vehicle outer side. The second flange portions 73 and 74 extend to the rear of the vehicle body (or along the other longitudinal direction of the closed section CS) on the side of the main body 71 and are joined to the side surfaces 62 and 63 on the rear side of the vehicle body. Has been. The end portions of the second flange portions 73 and 74 on the main body portion 71 side are located below the first bent portion 76 (or on the side opposite to the first flange portion). The main surfaces of the second flange portions 73 and 74 intersect with the main surface of the first flange portion 72.

  Further, the upper edge portions 73 a and 74 a of the second flange portions 73 and 74 extend obliquely upward from the main body portion 71. That is, the upper edge portions 73a and 74a are inclined so as to approach the upper surface of the closed section CS from the main body portion 71. At this time, as shown in FIG. 4, the upper surface 73a (74a) of the main body 71, the second flange 73 (74), and the upper surface of the closed cross-section CS are seen from the side (viewed from the vehicle width direction). It is preferable that a truss shape indicated by a symbol TR in FIG. In the present embodiment, the main body portion 71 is not in contact with the floor panel 10, but the line portion constituting the main body portion 71 constitutes one side of the truss shape. Further, in addition to the case where the upper edge portion 73a (74a) of the second flange portion 73 (74) is in contact with the floor panel 10, the upper edge portion 73a (74a) slightly extends from the lower surface of the floor panel 10 (the thickness of the floor panel 10). The degree of truss shall be defined even if they are separated. The lower edge portions of the second flange portions 73 and 74 extend from the main body portion 71 without being inclined upward or downward.

  The third flange portion 75 extends to the rear of the vehicle body below the main body portion 71 and is joined to the lower surface 61 of the tunnel side frame 60 in a state where substantially the entire surface is in contact, thereby forming a rigid coupling portion. . The first bent portion 76 is bent to connect the main body portion 71 and the first flange portion 72. The second bent portions 77 and 78 are bent to connect the main body portion 71 and the second flange portions 73 and 74, respectively. The third bent portion 79 is bent and connects the main body portion 71 and the third flange portion 75.

  The vibration damping member 80 is made of a material that can be bonded to the upper surface of the first flange portion 72 of the node member 70 and the lower surface of the floor panel 10. The vibration damping member 80 is a viscoelastic member made of a silicone material or an acrylic material. Specifically, the vibration damping member 80 is a viscoelastic member having a storage elastic modulus of 500 MPa or less and a loss coefficient of 0.2 or more under the conditions of a temperature of 20 degrees and an excitation force frequency of 30 Hz. Is preferably used. When the storage elastic modulus is 500 MPa or less, it is possible to avoid an excessive increase in the coupling rigidity at the flexible coupling portion between the first flange portion 72 and the closed cross section CS. Further, when the loss coefficient is 0.2 or more, a high vibration damping effect by the vibration damping member 80 can be obtained.

  The thickness of the vibration damping member 80 is preferably larger than the gap between the upper surface of the first flange portion 72 and the lower surface of the floor panel 10. Thereby, it can provide in the state which compressed the vibration damping member 80 between the 1st flange part 72 and the floor panel 10, and can make the contact | adhesion power of the 1st flange part 72 and the floor panel 10 high.

  When vibration is input to the closed section CS, the vibration is absorbed by the distortion of the vibration damping member 80 and is released as thermal energy. At this time, the second flange portions 73 and 74 of the node member 70 extend from below the first bent portion 76 in the main body portion 71, and the upper edge portions 73 a and 74 a of the second flange portions 73 and 74 are the main body portion 71. For example, the second flange portions 73 and 74 function as support portions against distortion of the first bent portion 76. In addition, above the first flange portion 72 of the node member 70, the panel member 12 of the floor panel 10 is sandwiched between No. 1 and No. 2. 2.5 The flange 22c of the cross member 22 is positioned so as to overlap in the longitudinal direction of the vehicle body. As a result, the rigidity around the first bent portion 76 that is likely to be distorted by vibration is improved, and the strain is more concentrated on the vibration damping member 80. In this way, a high vibration damping effect can be obtained by the vibration damping member 80 while improving the rigidity by disposing the node member 70 in the closed cross section CS.

Next, an exemplary method for disposing the node member 70 in the closed cross section CS defined by the floor panel 10 and the tunnel side frame 60 will be described. This method includes the following steps S1 to S5.
(S1) The node member 70 having the above structure is prepared and disposed in the tunnel side frame 60.
(S2) The second flange portions 73 and 74 and the third flange portion 75 of the joint member 70 are respectively positioned at the positions indicated by x (cross) in FIGS. 4 and 5 and the side surfaces 62 and 63 of the tunnel side frame 60. Spot welding is performed on the lower surface 61.
(S <b> 3) An uncured paste-like material constituting the vibration damping member 80 is applied to the upper surface of the first flange portion 72 of the node member 70.
(S4) The flange portions 64 and 65 of the tunnel side frame 60 are joined to the lower surface of the floor panel 10.
(S5) The paste-like material is thermally cured to form the vibration damping member 80.

  In the present embodiment, the thermosetting of the pasty material in step S5 is performed by heating in the electrodeposition coating drying step.

  Here, as shown in FIG. 8, in step S <b> 2, the second flange portion 73 (74) is spot welded to the side surface 62 (63) of the tunnel side frame 60 using the spot welding gun WG. The spot welding gun WG has two electrode tips at the tip, and welding is performed by applying pressure with the electrode tip sandwiching the welded portion. Typically, the electrode tip of the spot welding gun WG is formed with its tip bent. In FIG. 8, the second flange portion 73 that is the welded portion can be appropriately welded to the side surface 62 of the tunnel side frame 60. On the other hand, when it is necessary to weld the second flange portion 73 further downward, and therefore it is necessary to move the gun WG further downward, the electrode tip on the outside of the vehicle interferes with the flange portion 65 of the tunnel side frame 60. In the present embodiment, since the upper edge portions 73a and 74a of the second flange portions 73 and 74 are inclined upward from the main body portion 71, the second flange portion on the side surface 62 (63) of the tunnel side frame 60 is obtained. The position of 73 (74) can be made sufficiently upward, so that the gun WG and the flange portion 65 of the tunnel side frame 60 can be prevented from interfering with each other.

  The present invention has been described above with reference to exemplary embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements and design changes can be made without departing from the scope of the present invention. It is.

  For example, in the above embodiment, the node member 70 is provided in the closed cross section defined by the two vehicle body components (the floor panel 10 and the tunnel side frame 60), but the present invention is not limited to this. A node member may be provided in a closed cross section defined by one vehicle body component member or three or more vehicle body component members.

  Moreover, in the said embodiment, although the shape of closed cross-section part CS was made into the square (or substantially square), this invention is not limited to this, The polygon (or substantially polygon) which has five or more sides Alternatively, the shape may be partially curved. In the embodiment, the first flange portion 72 and the second flange portions 73 and 74 are respectively joined to the upper surface and the side surface adjacent to each other in the closed section CS, but the shape of the closed section CS has five or more sides. In the case of a square shape or the like, the surface to which the first flange portion 72 is joined and the surface to which the second flange portions 73 and 74 are joined may be adjacent to each other via another surface.

  In the above embodiment, the vibration damping member 80 is provided on the upper side of the node member 70. However, the present invention is not limited to this, and the vibration is applied to the lower side of the node member 70, that is, the lower surface of the third flange portion 75. A damping member 80 may be provided.

  Moreover, in the said embodiment, although the tunnel side frame 60 and the node member 70 which define the closed cross-section part CS were joined by spot welding, this invention is not limited to this, For example, the volt | bolt and the nut were used. You may join by bolting.

  In the above-described embodiment, an example in which paste material is applied to the upper surface of the first flange portion 72 of the node member 70 and thermally cured is used as the vibration damping member 80 has been described. Without being limited thereto, a sheet-like viscoelastic member may be provided on the upper surface of the first flange portion 72.

  Moreover, in the said embodiment, although only one node member 70 is provided in the closed cross-section part CS, this invention is not limited to this, The several position where distortion becomes large by the vibration generate | occur | produced in each part of the vehicle A similar node member can be provided.

  Moreover, although the lower edge part of the 2nd flange parts 73 and 74 demonstrated the example extended without tilting upward or downward with respect to the upper surface (or lower surface) of the closed cross-section part CS in the said embodiment. The present invention is not limited to this, and the lower edge portion may extend from the main body portion 71 in an inclined manner.

  As described above, according to the present invention, the node member provided in the closed cross-section portion secures and improves the rigidity and suppresses the vibration transmitted to the passenger in the vehicle cabin to improve the riding comfort. Therefore, the present invention may be suitably used in the field of manufacturing a vehicle body having such a closed cross section.

10 Floor panel 11 Tunnel component 12 Panel member 22 2.5 cross member (floor cross member)
22c Flange portion 30 Side sill 40 Seat rail 50 Seat rail mounting member 60 Tunnel side frame 70 Node member 71 Body portion 72 First flange portion 73, 74 Second flange portion 73a, 74a Upper edge portion 75 Third flange portion 76 First fold Curved portions 77, 78 Second bent portion 79 Third bent portion 80 Vibration damping member CS Closed cross-sectional portion

Claims (3)

A vehicle body structure for a vehicle having a node member in a closed cross section defined by one or more vehicle body components,
The node member extends along one side of the longitudinal direction from the main body part through the bent part, and extends along the longitudinal direction from the main body part through the bending part. A first flange portion joined to the first surface, and extends along the other side in the longitudinal direction from a portion on the side opposite to the first flange portion of the bent portion in the main body portion, and is adjacent to the first surface of the closed cross-section portion A second flange portion joined to the second surface,
The vehicle body structure of a vehicle, wherein an edge portion on the first surface side of the second flange portion extends so as to approach the first surface of the closed section from the main body portion. A truss shape is defined in a side view by an edge portion on the first surface side of the main body portion, the second flange portion, and a first surface of the closed section portion,
The vehicle body structure according to claim 1. The closed cross-section is defined by a floor panel and a tunnel-side tunnel side frame that is joined to one surface of the floor panel and extends in one of the vehicle body longitudinal directions,
A floor cross member extending in the vehicle width direction is joined to the other surface of the floor panel,
The floor cross member has a flange portion extending in one of the vehicle body longitudinal directions,
The first flange portion of the node member overlaps with the flange portion of the floor cross member in the vehicle longitudinal direction,
The vehicle body structure according to claim 1 or 2.

Images