JP2021084490A - Vehicle body structure - Google Patents

Abstract

To provide a vehicle body structure capable of reducing low-frequency noise for an occupant in a vehicle interior through damping vibration of a roof panel.SOLUTION: A vehicle body structure 100 comprises: a roof panel 104 which covers an upper section 106 of an interior of a vehicle 102; a frame body 108 which encloses a periphery of the roof panel; and a cross member 114 which is arranged on the roof panel at an interior side in a manner that stretches across the frame body in a vehicle width direction with a groove 168 arranged along a longitudinal direction thereon. The roof panel has: a concave section 152 which is intermittently concaved along the cross member; convex sections 156 and 158 which have longer distance to the cross member than the concave section; and two inclined sections 162 and 164 which connect the concave section and the convex sections. The vehicle body structure also has: two first sealer materials 134 and 136 which are arranged in the groove of the cross member, bond the cross member and the roof panel, and has damping force; and a second sealer material 146 which is arranged in the groove of the cross member and is filled in a gap between the first sealer materials so as to bond the cross member and the concave section of the roof panel.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle body structure.

The roof panel of a vehicle such as an automobile has a thin plate shape and has a size that covers the upper part of the passenger compartment. For this reason, the roof panel easily vibrates, and when a low frequency is formed, it becomes one of the causes of low frequency noise for the occupants in the passenger compartment. Therefore, in general, the vibration of the roof panel is reduced by forming a bead on the roof panel or increasing the structural strength of the roof panel by a reinforcing member such as a cross member located on the passenger compartment side of the roof panel. Measures have been taken.

Patent Document 1 describes a vehicle roof including a pair of left and right roof side rails extending in the front-rear direction of the vehicle, reinforcement extending in the vehicle width direction between the pair of roof side rails, a roof panel, and an adhesive portion. The structure is described. The roof panel is located above the reinforcement and between the pair of roof side rails. Further, the roof panel is provided with concave lines extending in the front-rear direction of the vehicle at two locations arranged side by side when viewed in the vehicle width direction. The adhesive portion is provided at the intersection with the concave line on the upper surface of the reinforcement, and the roof panel and the reinforcement are adhered to each other by using a mastic adhesive.

In Patent Document 1, a concave line extending in the front-rear direction of the vehicle is provided on the roof panel, and an adhesive portion is provided at the intersection of the reinforcement and the concave line to bond the roof panel and the reinforcement to the roof panel. It is said that the generated vibration is efficiently damped.

Japanese Unexamined Patent Publication No. 2012-245988

However, in the vehicle roof structure of Patent Document 1, although the adhesive is arranged at the intersection of the reinforcement and the concave line, the adhesive is only used to fix the roof panel. That is, in Patent Document 1, there is room for improvement regarding damping the vibration of the roof panel.

In view of such a problem, an object of the present invention is to provide a vehicle body structure capable of attenuating the vibration of the roof panel and reducing low-frequency noise for occupants in the vehicle interior.

In order to solve the above problems, a typical configuration of the vehicle body structure according to the present invention is a vehicle body structure including a roof panel covering the upper part of the passenger compartment of the vehicle, and the vehicle body structure is a frame body surrounding the outer periphery of the roof panel. The roof panel is provided with a reinforcing member which is located on the passenger compartment side of the roof panel and is extended to the frame in the vehicle width direction or the vehicle front-rear direction and has a recessed groove formed along the longitudinal direction thereof. An inclined connecting between a plurality of concave portions intermittently recessed along the reinforcing member, a convex portion having a longer distance to the reinforcing member than the plurality of concave portions, and each of the convex portion and the plurality of concave portions. Each having two inclined portions, the vehicle body structure is further arranged in a groove of the reinforcing member, and two first sealer materials each having a predetermined damping force by adhering the reinforcing member and each of the two inclined portions of the roof panel. It is characterized by including a predetermined second sealer material which is arranged in the groove of the reinforcing member and is filled between the two first sealer materials to adhere the reinforcing member and the recess of the roof panel.

According to the present invention, it is possible to provide a vehicle body structure capable of attenuating the vibration of the roof panel and reducing low-frequency noise for occupants in the vehicle interior.

It is a figure which shows the vehicle body structure which concerns on embodiment of this invention. It is a figure which shows the main part of the vehicle body structure of FIG. It is a figure which shows the behavior of the 1st sealer material and the 2nd sealer material at the time of assembling the vehicle body structure of FIG.

A typical configuration of the vehicle body structure according to the embodiment of the present invention is a vehicle body structure including a roof panel covering the upper part of the passenger compartment of the vehicle, and the vehicle body structure further includes a frame body surrounding the outer periphery of the roof panel and a roof. The roof panel is provided with a reinforcing member which is located on the passenger compartment side of the panel and is provided on the frame body in the vehicle width direction or the vehicle front-rear direction and has a recessed groove formed along the longitudinal direction thereof. A plurality of recesses that are intermittently recessed along the surface, a convex portion that has a longer distance to the reinforcing member than the plurality of recesses, and two inclined portions that connect between the convex portion and each of the plurality of recesses. The vehicle body structure has an inclined portion, and the vehicle body structure is further arranged in a groove of the reinforcing member, and the reinforcing member and the two inclined portions of the roof panel are adhered to each other to reinforce the two first sealer materials having a predetermined damping force. It is characterized by comprising a predetermined second sealer material which is arranged in a groove of the member and is filled between each of the two first sealer materials to adhere the reinforcing member and the recess of the roof panel.

In the above configuration, two first sealer materials each having a damping force are arranged in the groove of the reinforcing member, and the reinforcing member and the two inclined portions of the roof panel are adhered to each other. Further, a predetermined second sealer material is arranged in the groove of the reinforcing member, and each of the two first sealer materials is filled between the two first sealer materials to bond the reinforcing member and the recess of the roof panel. Therefore, even if the roof panel is deformed in the vertical direction due to an external load when assembling the vehicle body structure, the second sealer material is filled between the two first sealer materials. The shape of the 1 sealer material can be maintained by preventing the flow into the recesses by the second sealer material. Therefore, according to the above configuration, sufficient adhesion can be ensured between the reinforcing member and the inclined portion and the recess of the roof panel when the first sealer material and the second sealer material are thermoset. As a result, the vibration of the roof panel can be attenuated more effectively, and the low frequency noise for the occupants in the vehicle interior can be reduced. Further, since both the first sealer material and the second sealer material are arranged in the groove recessed along the longitudinal direction of the reinforcing member, they are prevented from flowing in the lateral direction of the reinforcing member and the shape is further maintained. Can be done. The second sealer material does not have to have the same damping force as the first sealer material as long as the reinforcing member and the recess of the roof panel can be adhered to each other. Therefore, the manufacturing cost can be reduced.

Each of the above two first sealer materials may straddle each of the two lower corners formed by each of the plurality of recesses of the roof panel and each of the two inclined portions. As a result, the first sealer material having a damping force supports the roof panel at the lower corner portion which is the boundary between the concave portion and the inclined portion of the roof panel, so that the damping force can be easily exerted.

It is preferable that each of the above two first sealer materials straddles each of the two upper corners formed by the convex portion of the roof panel and the two inclined portions. As a result, in addition to the lower corner portion that is the boundary between the concave portion and the inclined portion of the roof panel, the first sealer material having a damping force supports the roof panel at the upper corner portion that is the boundary between the convex portion and the inclined portion. Therefore, it becomes easier to exert the damping force. It should be noted that the lower corner portion to the upper corner portion of the roof panel is a highly rigid portion, and since the portion is supported by the first sealer material, the roof panel and the reinforcing member can be more firmly bonded to each other.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the examples are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate description, and elements not directly related to the present invention are not shown. To do.

FIG. 1 is a diagram showing a vehicle body structure 100 according to an embodiment of the present invention. FIG. 1A shows a state in which the vehicle 102 to which the vehicle body structure 100 is applied is viewed from diagonally forward. FIG. 1B shows the inside of the vehicle body structure 100. In each of the following figures, the front-rear direction of the vehicle is illustrated by arrows Front and Back, the left and right in the vehicle width direction are illustrated by arrows Left and Right, and the vehicle vertical direction is illustrated by arrows Up and Down, respectively.

The vehicle body structure 100 includes a roof panel 104 shown in FIG. 1 (a). The roof panel 104 is a thin plate-shaped body panel, and has a size that covers the upper part 106 of the passenger compartment of the vehicle 102. The vehicle body structure 100 further includes a frame body 108 shown in FIG. 1 (b) and a plurality of (here, four) cross members 110, 112, 114, and 116 as reinforcing members.

The frame body 108 has a pair of roof rails 118 and 120, a roof front member 122, and a roof end member 124, and these members surround the outer periphery of the roof panel 104. The pair of roof rails 118 and 120 are located on the left and right side ends of the roof panel 104 and extend in the front-rear direction of the vehicle. The roof front member 122 is located on the front end side of the roof panel 104 and extends in the vehicle width direction between the pair of roof rails 118 and 120. The roof end member 124 is located on the rear end side of the roof panel 104 and extends in the vehicle width direction between the pair of roof rails 118 and 120.

The plurality of cross members 110, 112, 114, 116 are located on the vehicle interior 126 side shown in FIG. 1A of the roof panel 104. Further, the cross members 110, 112, 114, 116 are separated from each other in the vehicle front-rear direction at predetermined intervals, and are further spread in the vehicle width direction between the pair of roof rails 118, 120 of the frame body 108.

The vehicle body structure 100 further comprises a plurality of first sealer members 128 as shown by hatching in FIG. 1 (b). The plurality of first sealer materials 128 are sealer materials to which a predetermined damping force is added in addition to an adhesive force, and exhibit a predetermined performance by being cured at the time of heat treatment. The predetermined damping force is, for example, one in which the loss tangent (tan δ) is as high as 0.5 or more at room temperature (20 degrees Celsius) and has a damping effect about twice as much as usual. As shown in FIG. 1B, the plurality of first sealer materials 128 are applied to a plurality of predetermined positions of the plurality of cross members 110, 112, 114, 116, and the plurality of cross members 110, 112, 114, The 116 and the roof panel 104 (see FIG. 2A) are glued together.

In the figure, among the plurality of cross members 110, 112, 114, 116, the first sealer materials 130, 132, 134, 136, 138 applied to a plurality of (six in this case) predetermined locations of the cross members 114. , 140 are typically coded.

The plurality of first sealer materials 128 shown in FIG. 1B are in a state of being cured by adhering the plurality of cross members 110, 112, 114, 116 and the roof panel 104. Here, when assembling the vehicle body structure 100, the vehicle body skeleton is cleaned before the applied first sealer material 128 is thermoset. During this cleaning, the thin plate-shaped roof panel 104 is greatly elastically deformed by the water flow. When the elastic deformation of the roof panel 104 is repeated, the first sealer material 128 before thermosetting is stretched and flows between the plurality of cross members 110, 112, 114, 116 and the roof panel 104, and the grounding is achieved. It becomes weak and may not provide sufficient adhesion during thermosetting. Further, if sufficient adhesion cannot be obtained during thermosetting, the thin plate-shaped roof panel 104 tends to vibrate, and if a low frequency is formed, low frequency noise to the occupants in the passenger compartment 126 is generated. It becomes one of the causes.

Therefore, in the vehicle body structure 100, the first sealer material 128 is arranged at an appropriate position in consideration of the shape of the roof panel 104 and the shapes of the plurality of cross members 110, 112, 114, 116 which are reinforcing members. Further, a predetermined second sealer material 142 (see FIG. 2A) is provided.

FIG. 2 is a diagram showing a main part of the vehicle body structure 100 of FIG. FIG. 2A is a cross-sectional view taken along the line AA of FIG. 1, in which the roof panel 104 is shown by a chain line. FIG. 2B is an enlarged view of a part of FIG. 2A. FIG. 2C is a diagram showing a vehicle body structure 200 of a comparative example.

The second sealer material 142 is filled in a plurality of predetermined positions of the plurality of cross members 110, 112, 114, 116 shown in FIG. 1 (b). Further, the second sealer material 142 does not have to have a damping force equivalent to that of the first sealer material 128 as long as the plurality of cross members 110, 112, 114, 116 and the roof panel 104 can be adhered to each other. Note that, in FIG. 2A, among the plurality of cross members 110, 112, 114, 116, the second sealer materials 144, 146, and 148 filled in a plurality of (three in this case) of the cross members 114 are used. It is typically coded.

As shown in FIG. 2B, the roof panel 104 has a plurality of (here, three) recesses 150, 152, 154, and a plurality of (here, two) convex portions 156, 158, and a plurality (here, two). It has four) inclined portions 160, 162, 164, and 166. The recesses 150, 152, and 154 are portions that are intermittently recessed along the cross member 114 extending in the vehicle width direction. The convex portions 156 and 158 are portions where the distance to the cross member 114 is longer than that of the plurality of concave portions 150, 152 and 154.

The inclined portions 160 and 166 are inclined portions connecting the concave portions 150 and 154 and the convex portions 156 and 158, respectively. The inclined portions 162 and 164 are inclined portions connecting the concave portions 152 and the convex portions 156 and 158, respectively, and face each other with the concave portion 152 interposed therebetween. In the following, the positions where the first sealer material 134, 136 and the second sealer material 146 are typically arranged will be described.

FIG. 3 is a diagram showing the behavior of the first sealer material 134, 136 and the second sealer material 146 when assembling the vehicle body structure 100 of FIG. 1. FIG. 3A shows a state in which the roof panel 104 is installed from above with respect to the first sealer material 134, 136 and the second sealer material 146 before thermosetting arranged on the cross member 114. FIG. 3B is a cross-sectional view taken along the line BB of FIGS. 1 and 3A.

The cross member 114 is extended to the frame body 108 in the vehicle width direction (see FIG. 1 (b)), and further recesses along the longitudinal direction, that is, the vehicle width direction, as shown in FIG. 3 (b). A groove 168 is formed. Then, as shown on the left side of FIG. 3A, the first sealer material 134, 136 and the second sealer material 146 before thermosetting are arranged in the groove 168 of the cross member 114.

At this time, as shown on the right side of FIG. 3A, the first sealer materials 134 and 136 are arranged so as to bond the groove 168 of the cross member 114 and the two inclined portions 162 and 164 of the roof panel 104. To. Further, the second sealer material 146 is filled between the two first sealer materials 134 and 136, and is arranged so as to bond the groove 168 of the cross member 114 and the recess 152 of the roof panel 104.

Here, at the time of assembling the vehicle body structure 100, the first sealer material when the elastic deformation of the roof panel 104 in the vertical direction is repeated before the thermosetting of the first sealer material 134, 136 and the second sealer material 146 is repeated. The behaviors of 134, 136 and the second sealer material 146 will be described. Even in such a case, in the vehicle body structure 100, as shown by the arrow on the right side of FIG. 3A, the first sealer material 134, 136 is the roof panel 104 by the filled second sealer material 146. The flow to the recess 152 is prevented and the shape can be maintained.

Further, since the first sealer material 134, 136 and the second sealer material 146 are all arranged in the groove 168 recessed along the vehicle width direction of the cross member 114, they flow in the vehicle front-rear direction of the cross member 114. Can be prevented and the shape can be maintained better.

On the other hand, in the vehicle body structure 200 of the comparative example shown in FIG. 2C, the second sealer materials 144, 146, and 148 are not filled. In such a vehicle body structure 200, the first sealer materials 132A, 134A, 136A, and 138A flow into the recesses 150, 152, and 154 of the roof panel 104 as shown by the arrows in the drawing, and cannot maintain their shapes. As a result, in the vehicle body structure 200, sufficient adhesion cannot be ensured between the cross member 114 and the inclined portions 160, 162, 164, and 166 of the roof panel 104, and the vibration of the roof panel 104 cannot be sufficiently damped. ..

On the other hand, according to the vehicle body structure 100, when the first sealer material 134, 136 and the second sealer material 146 are thermoset, between the groove 168 of the cross member and the inclined portions 162, 164 and the recess 152 of the roof panel 104. Can ensure sufficient adhesion. As a result, the vibration of the roof panel 104 can be attenuated more effectively, and the low frequency noise for the occupant in the passenger compartment 126 can be reduced. The second sealer material 146 filled between the two first sealer materials 134 and 136 does not have to have the same damping force as the first sealer materials 134 and 136, so that the manufacturing cost can be reduced. You can also.

Further, as shown in FIG. 2B, the two first sealer materials 134 and 136 straddle the two lower corner portions 170 and 172. The two lower corner portions 170 and 172 are portions formed by the recess 152 of the roof panel 104 and the two inclined portions 162 and 164. Therefore, in the vehicle body structure 100, at the two lower corner portions 170 and 172 that are the boundaries between the recess 152 of the roof panel 104 and the two inclined portions 162 and 164, the first sealer materials 134 and 136 having a damping force are the roof panel. Since it supports 104, it becomes easy to exert a damping force.

Further, as shown in FIG. 2B, the two first sealer members 134, 136 straddle the two upper corner portions 174, 176. The two upper corner portions 174 and 176 are portions formed by the convex portions 156 and 158 of the roof panel 104 and the two inclined portions 162 and 164.

Therefore, in the vehicle body structure 100, in addition to the lower corner portions 170 and 172 of the roof panel 104, the upper corner portions 174 and 176 that form the boundary between the convex portions 156 and 158 and the inclined portions 162 and 164 are used to form the first sealer material 134. 136 can support the roof panel 104. Therefore, in the vehicle body structure 100, the damping force of the first sealer materials 134 and 136 can be more easily exerted.

Further, in the roof panel 104, the lower corner portions 170 and 172 to the upper corner portions 174 and 176 have high rigidity and are greatly deformed by an external load. In the vehicle body structure 100, since the highly rigid portion of the roof panel 104 is supported by the first sealer materials 134 and 136, the cross member 114 and the roof panel 104 can be more firmly bonded to each other.

In the above embodiment, as shown in FIG. 1B, a plurality of cross members 110, 112, 114, 116 are delivered in the vehicle width direction of the frame body 108, but the present invention is not limited to this, and the vehicle front and rear of the frame body 108 Multiple cross members may be passed in the direction.

In this case, the plurality of cross members are formed with recessed grooves along the longitudinal direction thereof, that is, the vehicle front-rear direction. Further, the roof panel 104 has a plurality of concave portions intermittently recessed along a plurality of cross members extending in the front-rear direction of the vehicle, a convex portion having a longer distance to the cross member than the concave portion, and a convex portion and the plurality of concave portions. It forms two inclined portions, each of which is inclined to connect with each other. Then, two first sealer materials are arranged in the grooves of the cross member, and the cross member and the two inclined portions of the roof panel are adhered to each other. Further, a predetermined second sealer material is arranged in the groove of the cross member and filled between each of the two first sealer materials to bond the cross member and the recess of the roof panel.

In this way, the first sealer material can maintain its shape by the groove of the filled second sealer material and the cross member, and the cross member and the roof panel 104 can be sufficiently adhered to each other. As a result, the vibration of the roof panel 104 can be attenuated more effectively, and the low frequency noise for the occupant in the passenger compartment 126 can be reduced.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood.

The present invention can be used for a vehicle body structure.

100, 200 ... Body structure, 102 ... Vehicle, 104 ... Roof panel, 106 ... Upper part of cabin, 108 ... Frame, 110, 112, 114, 116 ... Cross member, 118, 120 ... Roof rail, 122 ... Roof front member, 124 ... Roof end member, 126 ... Vehicle interior, 128, 130, 132, 134, 136, 138, 140 ... First sealer material, 142, 144, 146, 148 ... Second sealer material, 150, 152, 154 ... Recessed , 156, 158 ... Convex part, 160, 162, 164, 166 ... Inclined part, 168 ... Groove, 170, 172 ... Lower corner part, 174, 176 ... Upper corner part

Claims (3)

In a vehicle body structure with a roof panel covering the upper part of the vehicle interior, the vehicle body structure is further described.
A frame that surrounds the outer circumference of the roof panel and
It is provided with a reinforcing member located on the passenger compartment side of the roof panel and extending to the frame in the vehicle width direction or the vehicle front-rear direction and having a recessed groove formed along the longitudinal direction thereof.
The roof panel has a plurality of concave portions intermittently recessed along the reinforcing member, a convex portion having a longer distance to the reinforcing member than the plurality of concave portions, and each of the convex portion and the plurality of concave portions. It has two sloping portions, each sloping connecting between, and
The body structure is further
Two first sealer materials each having a predetermined damping force by adhering the reinforcing member and two inclined portions of the roof panel, which are arranged in the groove of the reinforcing member, and
A vehicle body provided with a predetermined second sealer material which is arranged in a groove of the reinforcing member and is filled between each of the two first sealer materials to adhere the reinforcing member and the recess of the roof panel. Construction. The first aspect of claim 1, wherein each of the two first sealer materials straddles each of two lower corner portions formed by each of the plurality of recesses of the roof panel and each of the two inclined portions. The described body structure. The vehicle body structure according to claim 2, wherein each of the two first sealer members straddles each of two upper corner portions formed by a convex portion of the roof panel and two inclined portions. ..

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