JP2022170198A - Panel structure of vehicle - Google Patents

Abstract

To secure high sound insulation performance while improving panel rigidity.SOLUTION: A floor panel 7 is structured of a double wall panel 40 having an inner wall 43 (a first panel) and an outer wall 42 (a second panel). The double wall panel 40 includes a barrier wall 45 interposed between the inner wall 43 and the outer wall 42. The barrier wall 45 is structured of an inner side barrier wall main body 50 (a first barrier wall main body), an outer side barrier wall main body 51 (a second barrier wall main body), and damping members 53, 54 arranged between the inner side barrier wall main body 50 and the outer side barrier wall main body 51, and between the inner side barrier wall main body 50 and the outer wall 42. The inner side barrier wall main body 50 and outer side barrier wall main body 51 are structured so that the damping members 53, 54 are sheared and deformed when the inner wall 43 and outer wall 42 relatively contact with each other and separate from each other and when the inner wall 43 and outer wall 42 relatively displace in a direction along panel surfaces of both of the panels.SELECTED DRAWING: Figure 4

Description

The present invention relates to a vehicle panel structure comprising a double-wall panel in which a closed hollow layer (intermediate layer) is formed between an outer wall panel positioned on the outer side of the vehicle and an inner wall panel positioned on the inner side of the vehicle.

Research is progressing on suppressing the intrusion of noise from the exterior of the vehicle into the interior of the vehicle by constructing a part of the vehicle with the above-described double-walled panels. Double wall panels can be said to be an effective means of improving sound insulation performance, but it is difficult to ensure rigidity due to their hollow structure.

Therefore, when applying it to a vehicle, it is one of the issues to secure sufficient rigidity as well as securing sound insulation performance. For example, as one of means for solving such problems, a technique such as Patent Document 1 is disclosed. This document 1 discloses a vehicle floor structure consisting of double wall panels. Specifically, by installing partition walls (ribs) that divide the hollow layer between the upper and lower plates that make up the floor into multiple spaces (cells), the rigidity of the panel is increased while ensuring the hollow layer. An improved floor structure is disclosed.

JP 2018-177126 A

According to the conventional floor structure as disclosed in Patent Document 1, it is possible to improve panel rigidity while ensuring a hollow layer. However, according to this floor structure, for example, when vibration is transmitted to the lower plate through the tires, the vibration is further transmitted to the upper plate through the partition wall, and the vibration of the upper plate causes radiated noise in the passenger compartment. invade. Therefore, it is conceivable that noise in a relatively low frequency range, such as road noise, is likely to enter the vehicle interior.

The present invention has been made in view of the circumstances as described above, and an object of the present invention is to secure high sound insulation performance while improving panel rigidity in a vehicle panel structure composed of double wall panels. .

According to one aspect of the present invention, a vehicle panel structure includes a first panel and a second panel facing each other, and a closed hollow layer formed between the first and second panels. A panel structure for a vehicle comprising heavy wall panels, comprising a partition interposed between the first panel and the second panel. The partition wall includes a first partition wall body extending from the first panel toward the second panel, a second partition wall body extending from the second panel toward the first panel, and a first partition wall body and the first partition wall body. a damping member made of an adhesive material and provided at least between the first partition body and the second partition body among the two partition body bodies and between the first partition body and the second panel; and the first partition body and the second partition body are configured such that when the first panel and the second panel are relatively brought into contact with each other, and when the first panel and the second panel are both panels The damping member is configured to undergo shear deformation when relatively displaced in a direction along the panel surface of the damping member.

According to this panel structure, since the partition is interposed between the first panel and the second panel, the rigidity of the panel can be secured by the partition while securing the hollow layer. Moreover, since the partition wall is provided with a damping member, for example, even when vibrations are incident on the second panel from tires or the like, the vibration damping effect suppresses the propagation of vibrations from the second panel to the first panel. be. That is, the damping member undergoes shear deformation due to the relative displacement between the second panel and the first panel caused by the vibration of the second panel. Vibration propagation from to the first panel is suppressed. This prevents or suppresses a phenomenon in which vibration propagates from the second panel to the first panel through the partition, the second panel vibrates, and the radiated sound (noise) enters the vehicle interior.

Therefore, according to the above-described panel structure, it is possible to ensure high sound insulation performance while improving the panel rigidity in the vehicle panel structure composed of the double wall panel.

As a more specific structure, when the damping member is provided between the first partition wall body and the second partition wall body and between the first partition wall body and the second panel, the first The partition wall body includes a partition wall main portion extending from the first panel toward the second panel, and a flange portion extending along the second panel from the tip thereof. each has an opposing surface facing the direction along the panel surface, the damping member is provided between the flange portion of the first partition body and the second panel, and the first partition body and It is provided between the facing surfaces of the second partition main body.

According to this panel structure, the damping member provided between the first bulkhead main body and the second panel surface undergoes shear deformation with respect to the vibration component in the direction along the panel surface (the in-plane direction of the panel surface). A vibration damping effect is thereby obtained. Further, with regard to the vibration component in the direction perpendicular to the panel surface (the out-of-plane direction of the panel surface), the damping member provided between the facing surfaces of the first partition body and the second partition body undergoes shear deformation. A vibration damping effect is obtained by Therefore, regardless of the direction of vibration, it is possible to suppress the propagation of vibration from the second panel to the first panel (from the first panel to the second panel).

In addition, in the panel structure, the damping member may be provided only between the first partition body and the second partition body. In this case, each of the first partition body and the second partition body has a surface inclined with respect to the panel surface and facing each other, and the damping member includes the first partition body and the second partition body. It is preferable to provide between the opposing surfaces of the second partition main body. In this case, the facing surface may be inclined at 45° with respect to the panel surface.

In this panel structure, the damping member is provided only between the facing surfaces of the first partition body and the second partition body. can also shear the damping member. Therefore, with a simple structure in which the damping member is provided only between the first bulkhead body and the second bulkhead body, it is possible to enjoy the vibration damping effect regardless of the direction of vibration.

In this case, the first partition wall main body is configured by assembling a first part separate from the first panel to the first panel, and the second partition wall main body is the second partition wall main body. A second part, which is separate from the panel, is assembled to the second panel, and the first and second parts include the first partition main body and the It consists of a set of first and second parts selected from a plurality of types of first and second parts for forming the second partition main body.

Ideally, the damping member is provided for efficient shear deformation. In other words, it is ideal that the inclination angle of the facing surface is set so as to efficiently shear deformation according to the direction of vibration, and the angle is set to the location where the double wall panel is installed in the vehicle body. and the specific structure of the car body. In this regard, according to the above configuration, while the first and second panels are shared, only by changing the first and second parts assembled to them, a plurality of types of two panels having different inclination angles of the facing surfaces can be obtained. It becomes possible to manufacture heavy wall panels.

In the above-described panel structure, the first partition wall body includes a bulging portion integrally formed with the first panel so as to bulge toward the second panel side, and the second partition wall body includes the The configuration may be a bulging portion integrally formed with the second panel so as to bulge toward the first panel.

According to this structure, in the manufacturing process of the first panel and the second panel, the first partition main body and the second partition main body can be formed on the first panel and the second panel by pressing in one step. . Therefore, it contributes to the improvement of the productivity of the double wall panel.

A vehicle panel structure according to another aspect of the present invention includes a first panel and a second panel facing each other, and a closed hollow layer between the first panel and the second panel. 1. A panel construction for a vehicle, comprising formed double-walled panels, comprising a bulkhead interposed between said first panel and said second panel. The partition includes a first mode partition and a second mode partition. The first mode partition comprises a first partition body extending from the first panel toward the second panel and a damping adhesive material disposed between the first partition body and the second panel. The second mode partition wall portion includes a second partition wall main body extending from the second panel toward the first panel and the second partition wall portion facing each other in a direction along the panel surfaces of both panels. a third partition body extending from a first panel toward the second panel; and a damping member made of an adhesive material provided between the facing surfaces of the second partition body and the third partition body. ing.

According to this panel structure, since the partition is interposed between the first panel and the second panel, the rigidity of the panel can be secured by the partition while securing the hollow layer. Moreover, since the partition wall is provided with a damping member, for example, even if vibration is incident on the second panel from a tire or the like, the vibration damping effect suppresses the propagation of vibration from the second panel to the first panel. . In this case, the damping member of the first mode partition wall undergoes shear deformation to obtain a vibration damping effect for the vibration component in the direction along the panel surface (the in-plane direction of the panel surface). Further, with respect to the vibration component in the direction perpendicular to the panel surface (the out-of-plane direction of the panel surface), the damping member of the second mode partition wall undergoes shear deformation, thereby obtaining a vibration damping effect. Therefore, it is possible to suppress the propagation of vibration from the second panel to the first panel (from the first panel to the second panel) regardless of the direction of vibration.

Therefore, according to the above-described panel structure, it is possible to ensure high sound insulation performance while improving the panel rigidity in the vehicle panel structure composed of the double wall panel.

In the vehicle panel structure described above, the first panel is positioned inside the vehicle, and the second panel is positioned outside the vehicle.

According to this structure, the propagation of vibration from the second panel on the outside of the vehicle to the first panel on the inside of the vehicle is effectively suppressed, so that the sound insulation performance of the vehicle is improved.

Further, the vehicle panel structure described above is any one of a floor panel, a dash panel, a roof panel, and a door panel.

According to this structure, it is possible to effectively suppress the intrusion of noise such as road noise and running noise from outside the vehicle into the vehicle interior while ensuring the rigidity of the vehicle.

As described above, according to the vehicle panel structure of the present invention, it is possible to secure high sound insulation performance while improving panel rigidity in a vehicle panel structure composed of double wall panels.

1 is a perspective view of an automobile body to which a panel structure according to the present invention is applied; FIG. FIG. 2 is a partial cross-sectional view of the vehicle body including the floor panel (cross-sectional view taken along line II-II in FIG. 1); 1 is a perspective view of a double wall panel (first embodiment) that constitutes a floor panel; FIG. FIG. 4 is a partial cross-sectional view of the double wall panel (a cross-sectional view along line IV-IV in FIG. 3); FIG. 4 is a partial cross-sectional view of a double wall panel according to a second embodiment; FIG. 11 is a partial cross-sectional view of a double wall panel according to a third embodiment; FIG. 11 is a partial cross-sectional view of another aspect of the double wall panel according to the third embodiment; FIG. 11 is a partial cross-sectional view of a double wall panel according to a fourth embodiment; FIG. 11 is a schematic plan view of a double wall panel according to a fifth embodiment; Fig. 9 is a partial cross-sectional view of a double-walled panel according to a fifth embodiment, where (a) is a cross-section of the first partition (front part of the partition) (cross-sectional view of the portion along line Xa-Xa in Fig. 9) ), and (b) is a cross-sectional view of the portion of the second partition wall 47 (right side of the partition wall) (a cross-sectional view of the portion along line Xb-Xb in FIG. 9).

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[Car body structure]
FIG. 1 is a perspective view of an automobile body to which a vehicle panel structure according to the present invention is applied. In FIG. 1, reference numeral 1 indicates an engine room 1 (a motor room in the case of an electric vehicle), and reference numeral 2 indicates a passenger compartment. A dash panel 3 is provided between an engine room 1 and a vehicle compartment 2 to partition the vehicle in the longitudinal direction. An apron 4 extends toward the front of the vehicle from both upper parts of the dash panel 3 in the vehicle width direction. is provided with a front side frame 5. Bumper beams 6 extending in the vehicle width direction are attached to the front ends of these front side frames 5 via crash cans.

A floor panel 7 forming the floor surface of the vehicle interior 2 is continuously provided at the rear end of the lower portion of the dash panel 3. At the center of the floor panel 7 in the vehicle width direction, the floor panel 7 bulges into the vehicle interior 2 and extends forward and backward of the vehicle. A tunnel section 8 is provided extending in the direction. A kick-up portion 9 extending in the vertical direction is provided at the rear end of the floor panel 7 , and a rear floor 10 is connected to the rear of the kick-up portion 9 .

Hinge pillars 11 extending in the vertical direction of the vehicle are provided at both ends of the dash panel 3 in the vehicle width direction. A side sill 12 extending in the longitudinal direction of the vehicle is connected to the lower end of each hinge pillar 11 , and a front pillar 13 extending obliquely upward and rearward of the vehicle is connected to the upper end of the hinge pillar 11 .

A roof side rail 14 extending in the longitudinal direction of the vehicle is connected to the rear end of the front pillar 13 , and a rear pillar 15 extending obliquely to the rear and downward of the vehicle is connected to the rear end of the roof side rail 14 . there is

A longitudinally intermediate portion of the roof side rail 14 and a longitudinally intermediate portion of the side sill 12 are connected by a vertically extending center pillar 16 . A front door opening 17 is formed surrounded by the hinge pillar 11, the front pillar 13, the roof side rail 14, the center pillar 16, and the side sill 12, and a front door (not shown) can be opened and closed in the front door opening 17. It has been incorporated.

Also, the rear portion of the roof side rail 14 and the rear portion of the side sill 12 are vertically connected by an intermediate pillar 19 and a rear wheel house portion 20 . A rear door opening 21 is formed surrounded by the center pillar 16, the roof side rail 14, the intermediate pillar 19, the rear wheel house portion 20, and the side sill 12. A rear door (not shown) can be opened and closed at the rear door opening 21. It has been incorporated.

A front header 22 extending in the vehicle width direction is connected over the upper ends of the left and right front pillars 13 , and a rear header 23 extending in the vehicle width direction is connected over the upper ends of the left and right rear pillars 15 . A roof panel 24 is incorporated in a space surrounded by the front header 22, the rear header 23, and the left and right roof side rails 14. As shown in FIG.

FIG. 2 is a partial cross-sectional view of the vehicle body including mainly the lower part of the vehicle body, that is, the floor panel 7 (cross-sectional view taken along line II-II in FIG. 1).

The tunnel portion 8 includes a main body portion 30 having a gate shape in cross section, and lateral projecting portions 32 projecting outward in the vehicle width direction from lower portions on both left and right sides of the main portion 30 . The side protruding portion 32 has a closed cross-sectional structure with a rectangular cross section (rectangular or positive direction in this example) extending in the front-rear direction, and is formed integrally with the main body portion 30 . Reinforcement knots are provided at a plurality of locations in the front-rear direction inside the side protruding portion 32 .

A lower opening portion of the tunnel portion 8 is covered with a tunnel cover 36 . An exhaust pipe Ep (or a propeller shaft) is arranged in a space surrounded by the tunnel portion 8 and the tunnel cover 36 .

The side sill 12 has a closed cross-sectional structure with a rectangular cross section (rectangular or normal direction in this example) extending in the front-rear direction. At a plurality of positions inside the side sill 12 in the front-rear direction, knots for reinforcement against a collision load from the side are provided.

As shown in FIG. 2, the upper surface of the side sill 12 and the upper surface of the side protrusion 32 in the tunnel portion 8 are set at approximately the same height. A seat support frame (not shown) for supporting the seat is horizontally attached across the upper surface of the side projecting portion 32 .

The floor panel 7 is installed between the inner side surface 12a of the side sill 12 and the outer side surface 32a of the side protruding portion 32 on both left and right sides of the tunnel portion 8, respectively. Although not shown in FIG. 2, the inner side surface 12a and the outer side surface 32a facing each other are formed to be slightly tapered from the upper side to the lower side. It is fitted into the space between the side surface 12a and the outer side surface 32a from above.

The floor panel 7 consists of a double-walled panel, ie a panel in which a sealed hollow layer is formed between the inner and outer walls facing each other. FIG. 3 is a perspective view showing a double wall panel 40 (first embodiment) that constitutes the floor panel 7. FIG.

As shown in FIGS. 2 and 3, the double wall panel 40 is a hollow panel that is flat in the vertical direction, has a constant thickness, and is elongated in the front-rear direction and has a rectangular shape in plan view. The double wall panel 40 comprises an outer wall 42 , an inner wall 43 , a perimeter wall 44 and a partition wall 45 .

Each of the walls 42 to 45 is made of a rigid plate-like member having a certain thickness. Alternatively, it is made of fiber-reinforced resin such as CFRP or GFRP.

The outer wall 42 of the double-wall panel 40 forms the wall surface (lower surface) of the floor panel 7 outside the vehicle, and the inner wall 43 forms the wall surface (upper surface) of the floor panel 7 inside the vehicle. part. The outer wall 42 and the inner wall 43 are provided parallel to each other. In this example, the inner wall 43 corresponds to the "first panel" of the invention, and the outer wall 42 corresponds to the "second panel" of the invention.

The peripheral wall 44 is a portion forming the outer peripheral wall surface of the floor panel 7 . In this example, the peripheral wall 44 is formed integrally with the periphery of the outer wall 42 . That is, the outer wall 42 and the peripheral wall 44 are integrally formed to form a box-like shape that opens upward. By joining the inner wall 43 to the peripheral wall 44 , a hollow layer S sealed by the outer wall 42 , the inner wall 43 and the peripheral wall 44 is formed. The peripheral wall 44 may be formed integrally with the peripheral portion of the inner wall 43 , or may be formed separately from the outer wall 42 and the inner wall 43 and joined to the outer wall 42 and the inner wall 43 .

The partition wall 45 is a reinforcing member of the double wall panel 40 interposed between the outer wall 42 and the inner wall 43 . The rigidity of the double wall panel 40 is ensured by providing the partition wall 45 .

The partition 45 includes, as shown in FIG. 3 , a first partition 46 linearly extending in the front-rear direction, and two second partitions 47 intersecting the first partition 46 in a direction perpendicular thereto. The first partition 46 is arranged at the center of the outer wall 42 (inner wall 43) in the vehicle width direction, and the second partitions 47 are arranged at positions dividing the outer wall 42 (inner wall 43) into three equal parts in the longitudinal direction, for example. . Thereby, the hollow layer S of the double wall panel 40 is divided into six rectangular areas Sp in plan view.

The first partition wall 46 includes three portions, a partition front portion 46a, a partition middle portion 46b, and a partition rear portion 46c, which are aligned in the front-rear direction with the intersection of the second partition walls 47 as a boundary. Each second partition wall 47 includes two portions, a right partition wall portion 47a and a left partition wall portion 47b, which are aligned to the left and right with the intersecting position of the first partition walls 46 as a boundary.

FIG. 4 is a partial cross-sectional view of the double wall panel 40 (a cross-sectional view taken along line IV-IV in FIG. 3), showing a cross-section of the bulkhead front portion 46a of the first bulkhead 46. FIG.

As shown in FIGS. 3 and 4, the front bulkhead portion 46a is composed of an inner bulkhead body 50 and an outer bulkhead body 51 each made of a rigid body, and damping members 53 and . The inner partition wall body 50 and the outer partition wall body 51 are made of the same material as the walls 42 to 45 described above. made of the same material as The inner partition wall main body 50 corresponds to the "first partition main body" of the present invention, and the outer partition main body 51 corresponds to the "second partition main body" of the present invention.

The inner partition main body 50 is provided integrally with the inner wall 43 . The inner partition main body 50 and the inner wall 43 may be molded integrally, or may be formed separately from the inner wall 43 and joined to the inner wall 43 to be integrated.

The inner partition wall body 50 includes a partition main portion 501 extending from the lower surface of the inner wall 43 toward the outer wall 42 and a flange portion 502 extending leftward along the outer wall 42 from the tip thereof. The bulkhead main portion 501 has a plate-like shape having a thickness in the left-right direction (vehicle width direction), and the flange portion 502 has a plate-like shape having a thickness in the vertical direction. Therefore, the inner partition main body 50 has an L-shaped cross section as a whole.

The flange portion 502 and the outer wall 42 are parallel to each other and opposed to each other in the vertical direction with a gap G1 of a certain size therebetween. A damping member 53 made of an adhesive material is filled between the facing surfaces of the flange portion 502 and the outer wall 42 .

In this example, the damping member 53 has a storage elastic modulus of 0.6 to 500 MPa and a loss factor of 0.2 or more under the condition that the temperature is 20° C. and the frequency of the excitation force is 30 Hz. , for example, attenuating bonds. As the damping member 53, for example, a material mainly composed of rubber such as styrene-butadiene rubber or elastomer resin such as polyester resin can be applied. As a result, the inner partition main body 50 can be positioned with respect to the outer wall 42 in any direction along the facing surfaces of the outer wall 42 and the inner wall 43 (hereinafter referred to as the panel surface), that is, the in-plane direction of the panel surface (FIG. 4). It is fixed to the outer wall 42 so as to allow relative displacement (see white arrow D1 in the middle). Note that the arrow D1 in FIG. 4 indicates only the horizontal direction of the in-plane directions of the panel surface.

The outer partition main body 51 is provided integrally with the outer wall 42 . The outer partition wall body 51 has a plate-like shape extending from the upper surface of the outer wall 42 toward the inner wall 43 and having a thickness in the left-right direction. is placed parallel to the

The outer partition wall main body 51 and the partition main portion 501 face each other with a gap G2 having a constant dimension in the left-right direction. The dimension of this gap G2 is substantially the same as the gap G1 between the flange portion 502 of the inner partition main body 50 and the outer wall 42 .

A damping member 54 is filled between the opposing surfaces of the outer partition main body 51 and the main partition 501 . The damping member 54 is the same damping bond as the damping member 53 that is filled between the flange portion 502 of the inner bulkhead body 50 and the outer wall 42, but is separated from the damping member 53 as shown in FIG. It is provided in a continuous state (discontinuous). As a result, the outer partition wall main body 51 is positioned with respect to the inner wall 43 in all directions along the opposing surface between the main partition wall portion 501 and the outer partition main body 51, that is, in the in-plane direction of the opposing surface (arrow D2 in FIG. 4). ) are fixed to the inner bulkhead main body 50 so as to allow relative displacement. The arrow D2 indicates only the direction orthogonal to the panel surface (the out-of-plane direction of the panel surface) among the in-plane directions of the facing surface. The out-of-plane direction is, in short, the direction in which the outer wall 42 and the inner wall 43 approach and separate from each other.

The structure of the partition wall front portion 46a of the first partition wall 46 has been described above, and the structures of the partition wall middle portion 46b and the partition wall rear portion 46c are the same as the partition wall front portion 46a. The structure of the second partition 47 (right partition 47a and left partition 47b) is basically the same as that of the first partition 46 (front partition 46a, middle partition 46b and rear partition 46c). . For example, the cross-sectional structure of the partition wall right portion 47a along line QQ in FIG. 3 is basically the same as the cross-sectional structure of the partition wall front portion 46a shown in FIG. Therefore, regarding the structural portions of the middle partition wall portion 46b, the rear partition wall portion 46c, and the second partition wall 47 (the right partition wall portion 47a and the left partition wall portion 47b) of the first partition wall 46, the same portion as the front partition wall portion 46a is Description will be made using the same reference numerals as those of the portion 46a.

In the double-wall panel 40, as shown in FIG. 3, the partition wall main portions 501 of the partition wall front portion 46a, the partition wall middle portion 46b, and the partition wall rear portion 46c of the first partition wall 46 are continuous in the front-rear direction. In other words, each partition wall main portion 501 is provided in common to the entire first partition wall 46 . On the other hand, the flange portion 502 and the outer partition main body 51 of each of the partition wall front portion 46a, the partition wall middle portion 46b and the partition wall rear portion 46c are provided independently of each other at the partition wall front portion 46a, the partition wall middle portion 46b and the partition wall rear portion 46c. That is, the flange portion 502 and the outer partition main body 51 are separated from the second partition 47 and the peripheral wall 44 at both ends in the longitudinal direction (front-rear direction), as shown in FIG.

The same applies to the second partition 47 as well. Each partition main portion 501 of the right partition wall portion 47a and the left partition wall portion 47b of the second partition wall 47 is continuous in the left-right direction. On the other hand, the flange portion 502 and the outer partition wall main body 51 are provided independently of each other at the partition wall right portion 47a and the partition wall left portion 47b. That is, as shown in FIG. 3, the flange portion 502 and the outer partition main body 51 are separated from the first partition 46 and the peripheral wall 44 at both ends in the longitudinal direction (horizontal direction).

[Effects, etc.]
The floor panel 7 described above is composed of a double wall panel 40 in which a closed hollow layer S is formed between an outer wall 42 positioned on the vehicle exterior side and an inner wall 43 positioned on the vehicle interior 2 side. As described above, the double wall panel 40 has a partition wall 45 interposed between the inner wall 43 and the outer wall 42 . Therefore, sufficient rigidity is ensured while ensuring the hollow layer S.

Moreover, since the partition wall 45 is provided with the damping members 53 and 54 , even if vibrations from tires or the like are transmitted to the outer wall 42 , the vibration damping effect of the damping members 53 and 54 causes the inner wall 43 to move through the partition wall 45 . Propagation of vibration to is suppressed. That is, when the outer wall 42 vibrates and the outer wall 42 and the inner wall 43 are relatively displaced, the damping members 53 and 54 are sheared due to the relative displacement, and part or all of the vibrational energy is converted into thermal energy. disappears. As a result, vibration propagation from the inner wall 43 to the outer wall 42 is suppressed. Therefore, the provision of the partition wall 45 causes an adverse effect, that is, vibration propagates from the outer wall 42 to the inner wall 43 via the partition wall 45, and radiated sound (noise) due to the vibration of the inner wall 43 enters the vehicle interior 2. phenomenon is effectively suppressed. For example, noise in a relatively low frequency range (mainly 500 Hz or less) such as road noise is effectively suppressed from entering the vehicle interior.

Therefore, according to the structure of the floor panel 7 (double wall panel 40), it is possible to ensure high sound insulation performance while improving panel rigidity.

In particular, the partition 45 (first partition 46, second partition 47) includes an inner partition body 50 extending from the inner wall 43 toward the outer wall 42 and an outer partition body 51 extending from the outer wall 42 toward the inner wall 43, and further The inner partition body 50 includes a partition main portion 501 extending from the inner wall 43 toward the outer wall 42 and a flange portion 502 extending along the outer wall 42 from the tip thereof. A damping member 53 is filled between the flange portion 502 of the inner partition body 50 and the outer wall 42, and a damping member 54 is filled between the facing surfaces of the main partition portion 501 of the inner partition body 50 and the outer partition body 51. It is

According to such a structure of the partition 45 (the first partition 46 and the second partition 47), of the vibration transmitted to the outer wall 42, the vibration component in the in-plane direction of the panel surface (arrow D1 in FIG. 4) is The damping member 53 between the bulkhead main body 50 (flange portion 502) and the outer wall 42 undergoes shear deformation. On the other hand, with respect to the vibration component in the out-of-plane direction (arrow D2 in FIG. 4) of the vibration, the damping member 54 between the inner partition wall body 50 and the outer partition wall body 51 undergoes shear deformation. Therefore, according to the structure of the floor panel 7 (double wall panel 40), it is possible to enjoy the vibration damping effect regardless of the direction of vibration, and it can be said that it greatly contributes to the improvement of the sound insulation performance.

As shown in FIG. 4, the double-wall panel 40 has a dimension h1 from the lower surface of the inner wall 43 to the tip (lower end) of the inner partition body 50, which extends from the upper surface of the outer wall 42 to the tip (upper end) of the outer partition body 51. ) is set larger than the dimension h2. That is, the double-wall panel 40 is configured such that the section modulus of the inner wall 43 side including the inner partition body 50 is larger than the section modulus of the outer wall 42 side including the outer partition wall body 51 . Therefore, according to the structure of the double wall panel 40, the panel rigidity on the inner wall 43 side, that is, the panel rigidity on the side supporting the occupant, etc. can be increased, and the durability of the floor panel 7 (double wall panel 40) can be improved. Contribute to improvement.

[Second Embodiment of Double Wall Panel]
FIG. 5 is a partial cross-sectional view of a double wall panel 40A according to the second embodiment, and is a cross-sectional view corresponding to FIG. 4 of the first embodiment. It is a sectional view.

As shown in FIG. 5, also in the second embodiment, the partition front part 46a (first partition 46) is composed of an inner partition main body 50, an outer partition main body 51, and a damping member 54. The configuration is common to that of the partition wall front portion 46a of the embodiment.

However, in the second embodiment, the inner partition main body 50 has a partition main portion 501 extending vertically from the lower surface of the inner wall 43 toward the outer wall 42 and an inclined portion 503 extending obliquely from the tip thereof. The inclined portion 503 is inclined at a predetermined angle θ with respect to the panel surface, and in this example, is inclined at θ=45°, for example.

The outer partition main body 51 also extends obliquely from the outer wall 42 toward the inner wall 43 so as to be parallel to the inclined portion 503 with a gap G3 of a certain size. A damping member 54 is filled between the facing surfaces of the inclined portion 503 of the inner partition main body 50 and the outer partition main body 51 .

With this configuration, in the second embodiment, the relative displacement between the inner partition wall body 50 and the outer partition wall body 51 is controlled by the in-plane direction ( 5) to shear the damping member 54. As shown in FIG. Note that the arrow D3 in FIG. 5 indicates only the left and right directions of the in-plane directions of the facing surface.

The structure of the partition wall front portion 46a of the first partition wall 46 has been described above, and the structures of the partition wall middle portion 46b and the partition wall rear portion 46c are the same as the partition wall front portion 46a. The structure of the second partition 47 (right partition 47a and left partition 47b) is basically the same as that of the first partition 46 (front partition 46a, middle partition 46b and rear partition 46c). .

According to the double wall panel 40A of the second embodiment as described above, the damping member 54 is provided only between the facing surfaces of the inner partition body 50 and the outer partition wall body 51. The damping member 54 can be shear-deformed by vibrations in both the inward and out-of-plane directions. Therefore, with a simple structure in which the damping member 54 is provided only between the inner bulkhead body 50 and the outer bulkhead body 51, it is possible to enjoy the vibration damping effect regardless of the direction of vibration. Therefore, it contributes to simplifying the structure of the partition wall 45 , thereby improving the productivity and reducing the cost of the double-wall panel 40 .

[Third Embodiment of Double Wall Panel]
FIG. 6 is a partial cross-sectional view of a double wall panel 40B according to the third embodiment, and is a cross-sectional view corresponding to FIG. The double wall panel 40B of the third embodiment is positioned as a modification of the second embodiment.

As shown in FIG. 6, the inner partition wall body 50 is configured by a bulging portion 504 integrally formed with the inner wall 43 so as to bulge toward the outer wall 42 , and the outer partition wall body 51 is formed by the inner wall 43 . A bulging portion 511 integrally formed with the outer wall 42 bulges toward the outer wall 42 .

The inner partition wall main body 50 (bulged portion 504) and the outer partition wall main body 51 (bulged portion 511) have a rectangular cross-sectional shape extending in the front-rear direction. The lower end surface 504a of the inner partition main body 50 and the upper end surface 511a of the outer partition main body 51 are opposed to each other with a gap G3 of a constant size, and these end surfaces 504a and 511a are formed at a predetermined angle θ ( θ=45°). A damping member 54 is filled between the lower end surface 504a of the inner partition main body 50 and the upper end surface 511a of the outer partition main body 51. As shown in FIG.

The structure of the partition wall front portion 46a of the first partition wall 46 has been described above, and the structures of the partition wall middle portion 46b and the partition wall rear portion 46c are the same as the partition wall front portion 46a. The structure of the second partition 47 (right partition 47a and left partition 47b) is basically the same as that of the first partition 46 (front partition 46a, middle partition 46b and rear partition 46c). .

According to the structure of the double-wall panel 40B of the third embodiment, the inner partition wall body 50 and the outer partition wall body 51 can be easily formed by press working during the manufacturing process of the outer wall 42 and the inner wall 43. It contributes to the improvement of the productivity of the wall panel 40 . In addition, since the inner partition main body 50 and the outer partition main body 51 are formed by the bulging portions 504 and 511, it is advantageous in terms of strength, and contributes to improving the durability of the floor panel 7 (double wall panel 40). .

In the double wall panel 40B of FIG. 6, the cross-sectional shape of the inner partition main body 50 (expanded portion 504) and the outer partition main body 51 (expanded portion 511) is rectangular. , the inner partition wall body 50 and the outer partition wall body 51 may have a triangular cross-sectional shape having inclined surfaces 504b and 511b inclined at a predetermined angle θ (θ=45°).

[Fourth Embodiment of Double Wall Panel]
FIG. 8 is a partial cross-sectional view of a double wall panel 40C according to the fourth embodiment, and is a cross-sectional view corresponding to FIG. The double wall panel 40C of the fourth embodiment is also positioned as a modification of the second embodiment.

In the fourth embodiment, the inner wall side part 60A is assembled to the inner wall 43 to form the inner partition wall main body 50, and the outer wall side part 60B is attached to the outer wall 42 to form the outer wall side part 60A. An outer partition main body 51 is formed by the part 60B. That is, the inner wall side part 60A corresponds to the "first part" of the present invention, and the outer wall side part 60B corresponds to the "second part" of the present invention. In this example, the outer wall 42, the inner wall 43 and the parts 60A and 60B are made of a metal material such as a steel plate, and the parts 60A and 60B are joined to the outer wall 42 and the inner wall 43 by welding, for example. Note that the means for assembling the parts 60A and 60B is not limited to welding.

The inner wall side part 60A is a plate-like part having a V-shaped cross section and having a first surface portion 61 and a second surface portion 62 corresponding to the partition wall main portion 501 and the inclined portion 503. is joined to The outer wall side part 60B is a plate-like part having a V-shaped cross section and having a first surface portion 65 corresponding to the outer partition main body 51 and a second surface portion 66. The second surface portion 66 is superimposed on the outer wall 42. In this state, the second surface portion is joined to the outer wall 42 .

With this configuration, an inner partition body 50 is provided on the inner wall 43 and an outer partition body 51 is provided on the outer wall 42 . A damping member 54 is filled between the inclined portion 503 of the inner partition body 50 (the second surface portion 62 of the inner wall side part 60A) and the outer partition wall body 51 (the first surface portion 65 of the outer wall side part 60B). .

The structure of the partition wall front portion 46a of the first partition wall 46 has been described above, and the structures of the partition wall middle portion 46b and the partition wall rear portion 46c are the same as the partition wall front portion 46a. The structure of the second partition 47 (right partition 47a and left partition 47b) is the same as that of the first partition 46 (front partition 46a, middle partition 46b and rear partition 46c).

According to the structure of the double-walled panel 40C of the fourth embodiment, the angle between the inclined portion 503 of the inner partition main body 50 and the outer partition main body 51 (said angle θ with respect to the panel surface) is set to a desired angle. It becomes possible to rationally produce the heavy wall panel 40C.

That is, the direction of vibration transmitted to the double wall panel 40C differs depending on the installation location of the double wall panel in the vehicle body, the specific structure of the vehicle body, and the like. Therefore, it is ideal to set the angle θ so that the damping member 54 is efficiently sheared according to the direction of vibration. For example, when the vibration component in the in-plane direction of the panel surface is dominant, the damping member 54 can be shear-deformed efficiently by setting the angle θ relatively small. On the other hand, when the vibration component in the direction orthogonal to the panel surface (the out-of-plane direction of the panel surface) is dominant, the damping member 54 can be shear-deformed efficiently by setting the angle θ relatively large. can. Therefore, it is ideal to optimize the angle θ according to the vibration characteristics such as the installation location of the double wall panel 40C in the vehicle body and the specific structure of the vehicle body.

Regarding this point, according to the configuration of the double wall panel 40C of the fourth embodiment, a set of parts 60A and 60B capable of realizing a desired angle θ is selected from a plurality of types of parts 60A and 60B having different angles θ. By incorporating the parts 60A and 60B into the outer wall 42 and the inner wall 43, the outer wall 42 and the inner wall 43 can be used in common while a plurality of types of double wall panels 40C having different angles θ can be rationally manufactured.

In this case, the parts 60A and 60B can be easily manufactured by press working, and the angle α between the first surface portion 61 and the second surface portion 62 of the inner wall side part 60A and the first surface portion 65 of the outer wall side part 60B and the second surface portion 66, the parts 60A and 60B having different angles .theta. can be easily manufactured.

The specific materials and shapes of the parts 60A and 60B that constitute the inner partition body 50 and the outer partition body 51 are not limited to those shown in FIG. 8, and can be changed as appropriate.

[Fifth Embodiment of Double Wall Panel]
FIG. 9 is a schematic plan view of a double wall panel 40D according to the fifth embodiment. 10(a) and 10(b) are partial cross-sectional views of the double wall panel 40D, and FIG. 10(a) is a cross-sectional view of the partition wall front portion 46a of the first partition wall 46 (see FIG. 9). 10(b) is a cross-sectional view of a portion of the right partition wall 47a of the second partition wall 47 (a cross-sectional view of a portion along the Xb-Xb line in FIG. 9). Figure). The double wall panel 40D of the fifth embodiment is positioned as a modification of the first embodiment.

In the first embodiment, both the first partition wall 46 and the second partition wall 47 are composed mainly of damping members 53 that shear deformation due to vibration components in the in-plane direction (arrow D1 in FIG. 4) of the panel surface, and mainly the panel surface. and a damping member 54 that is shear-deformed by a vibration component in a direction orthogonal to (the out-of-plane direction of the panel surface/arrow D2 in FIG. 4). On the other hand, in the double wall panel 40D of the fifth embodiment, the first partition 46 includes only the damping member 53 that shears due to the vibration component in the in-plane direction (arrow D1) of the panel surface, and the second partition 47 has a structure including only a damping member 54 that is shear-deformed by a vibration component in a direction orthogonal to the panel surface (out-of-plane direction of the panel surface/arrow D2).

Specifically, as shown in FIG. 10( a ), the partition front portion 46 a (first partition wall 46 ) includes a partition main portion 501 extending from the lower surface of the inner wall 43 toward the outer wall 42 and a main portion 501 extending from the tip of the main partition wall 501 toward the outer wall 42 . It has an inner partition main body 50 having an inverted T-shaped cross section and a flange portion 502 extending in the left-right direction along. A damping member 53 is filled between the flange portion 502 of the inner partition main body 50 and the outer wall 42 . The structure of the partition wall front portion 46a of the first partition wall 46 has been described above, and the structures of the partition wall middle portion 46b and the partition wall rear portion 46c are the same as the partition wall front portion 46a.

Further, as shown in FIG. 10(b), the partition wall right portion 47a (second partition wall 47) includes an inner partition wall main body 50 (referred to as the "third partition main body" of the present invention) extending from the lower surface of the inner wall 43 toward the outer wall 42. ) and an outer bulkhead body 51 extending from the outer wall 42 toward the inner wall 43 at a position adjacent to the front of the inner bulkhead body 50 and provided parallel to the inner bulkhead body 50 . A damping member 54 is filled between the inner partition body 50 and the outer partition body 51 . The structure of the right partition wall portion 47a of the second partition wall 47 has been described above, and the structure of the left partition wall portion 47b is the same as that of the front partition wall portion 46a.

In this example, the first partition wall 46 (front partition wall portion 46a, middle partition wall portion 46b, rear partition wall portion 46c) corresponds to the "first mode partition wall portion" of the present invention, and the second partition wall 47 (right partition wall portion 47a, The left partition wall portion 47b) corresponds to the "second mode partition wall portion" of the present invention.

In the double-wall panel 40D of the fifth embodiment, the damping member 53 of the first partition wall 46 shears mainly the vibration component in the in-plane direction (arrow D1) of the panel surface, and the damping member 53 attenuates the vibration. As a result, vibration propagation from the outer wall 42 to the inner wall 43 is suppressed. On the other hand, the vibration component in the direction perpendicular to the panel surface (arrow D2) is mainly sheared by the damping member 54 of the second partition 47, and the vibration damping effect of the damping member 54 causes the vibration from the outer wall 42 to the inner wall 43. Vibration propagation is suppressed. Therefore, similarly to the double wall panel 40 of the first embodiment, vibration propagation from the outer wall 42 to the inner wall 43 is effectively suppressed regardless of the direction of vibration.

In this example, as described above, the first partition 46 is configured as the "first mode partition" of the present invention, and the second partition 47 is configured as the "second mode partition" of the present invention. However, the configuration may be reversed and can be changed as appropriate.

[Modifications, etc.]
The structure of the floor panel 7 (double wall panels 40, 40A to 40D) of the embodiment described above is an example of a preferred embodiment of the vehicle panel structure according to the present invention. Modifications can be made as appropriate without departing from the scope of the invention. For example, it is possible to employ the following configuration.

(1) In the double wall panel 40 of the first embodiment, as shown in FIG. The partition 46 and the second partition 47 are connected (continuous) to each other at their intersections. However, both ends of the first partition 46 and the second partition 47 may be separated from the peripheral wall 44 . Similarly, the intersections of the first partition 46 and the second partition 47 may be separated from each other. This point is the same for the double wall panels 40A-40D of the other embodiments.

(2) In the double-wall panel 40 of the first embodiment, the partition 45 has a lattice shape composed of the first partition 46 extending in the front-rear direction and the second partition 47 extending in the vehicle width direction. However, the partition 45 is not limited to this. For example, the partition 45 may be provided so as to be positioned on the diagonal line of the double wall panel 40 in plan view. This point is the same for the double wall panels 40A-40D of the other embodiments.

(3) In the embodiment, an example in which the floor panel 7 is composed of double wall panels 40, 40A to 40D has been described. It may be configured by a double wall panel having a structure similar to the double wall panels 40, 40A to 40D already described. According to these structures, it is possible to effectively suppress the intrusion of noise such as road noise and running noise from outside the vehicle into the vehicle interior 2 while ensuring the rigidity of the vehicle.

2 vehicle compartment 3 dash panel 7 floor panel 8 tunnel part 10 rear floor 12 side sill 24 roof panel 40, 40A, 40B, 40C, 40D double wall panel 42 outer wall (first panel)
43 Inner wall (second panel)
44 peripheral wall 45 partition 46 first partition 47 second partition 50 inner partition main body (first partition main body)
51 outer bulkhead body (second bulkhead body)
501 partition wall main portion 502 flange portion 53, 54 damping member S hollow layer

Claims (9)

1. A panel structure for a vehicle, comprising a double-walled panel having first and second panels facing each other and having a closed hollow layer formed between the first and second panels, comprising:
a partition interposed between the first panel and the second panel;
The partition is
a first partition body extending from the first panel toward the second panel;
a second partition body extending from the second panel toward the first panel;
Between the first partition body and the second partition body and between the first partition body and the second panel, at least between the first partition body and the second partition body , and a damping member made of an adhesive material,
The first partition wall body and the second partition wall body are arranged such that when the first panel and the second panel are relatively brought into contact with each other, and when the first panel and the second panel are brought into contact with the panel surfaces of both panels. A panel structure for a vehicle, wherein the damping member is configured to undergo shear deformation when relatively displaced in a direction along the vehicle. In the vehicle panel structure according to claim 1,
The damping member is provided between the first partition body and the second partition body and between the first partition body and the second panel,
The first partition main body includes a partition main portion extending from the first panel toward the second panel, and a flange portion extending along the second panel from the tip thereof,
each of the first partition body and the second partition body has a facing surface facing the direction along the panel surface;
The damping member is provided between the flange portion of the first partition body and the second panel, and is provided between the facing surfaces of the first partition body and the second partition body. A vehicle panel structure characterized by: In the vehicle panel structure according to claim 1,
The damping member is provided only between the first partition body and the second partition body,
each of the first partition body and the second partition body has a surface inclined with respect to the panel surface and facing each other;
The vehicle panel structure, wherein the damping member is provided between the facing surfaces of the first partition body and the second partition body. In the vehicle panel structure according to claim 3,
A panel structure for a vehicle, wherein the facing surface is inclined at 45° with respect to the panel surface. In the vehicle panel structure according to claim 3,
The first partition main body is configured by assembling a first part separate from the first panel to the first panel,
The second partition main body is configured by assembling a second part separate from the second panel to the second panel,
The first and second parts are a set selected from a plurality of types of first and second parts for forming the first partition body and the second partition body, the inclination angles of the facing surfaces of which are different from each other. A vehicle panel structure comprising first and second parts. In the vehicle panel structure according to any one of claims 1, 3 and 4,
the first partition main body includes a bulging portion integrally formed with the first panel so as to bulge toward the second panel;
A panel structure for a vehicle, wherein the second partition main body comprises a bulging portion integrally formed with the second panel so as to bulge toward the first panel. 1. A panel structure for a vehicle, comprising a double-walled panel having first and second panels facing each other and having a closed hollow layer formed between the first and second panels, comprising:
a partition interposed between the first panel and the second panel;
the partition includes a first mode partition and a second mode partition;
The first mode partition comprises a first partition body extending from the first panel toward the second panel and a damping adhesive material disposed between the first partition body and the second panel. is composed of
The second mode partition wall portion includes a second partition main body extending from the second panel toward the first panel, and a second mode partition wall portion extending from the first panel to the first partition wall so as to face each other in a direction along the panel surfaces of both panels. characterized by comprising a third partition body extending toward two panels, and a damping member made of an adhesive material provided between opposing surfaces of the second partition body and the third partition body. vehicle panel structure. In the vehicle panel structure according to any one of claims 1 to 7,
A panel structure for a vehicle, wherein the first panel is positioned inside the vehicle, and the second panel is positioned outside the vehicle. In the vehicle panel structure according to any one of claims 1 to 8,
A vehicle panel structure, wherein the panel structure is any one of a floor panel, a dash panel, a roof panel, and a door panel.

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