JPH11236943A - Vibration control structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower the vibration while restricting increase of the weight by efficiently attaching a vibration control member to an oil pan made of steel plate of an engine to be mounted on an automobile. SOLUTION: A vibration control member 11 made of resin and for restricting the vibration is attached to a box-type oil pan 10 formed of a bottom surface 10a, side surfaces 10b, 10c and an opening part opposite to the bottom surface. In this case, the vibration control member 11 is radially attached from the center of gravity position 10g of the bottom surfaces 10a1 , 10a2 , 10a3 , 10a4 and side surfaces 10b1 , 10c1 , 10c2 , toward a vertex 10d of the outline or an intermediate point 10e.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping structure applied to suppress vibration of a box-shaped steel plate forming, for example, an oil pan of an engine mounted on an automobile.

[0002]

2. Description of the Related Art Conventionally, as a steel sheet 1 forming an oil pan of an engine mounted on an automobile, as shown in FIG. 25, petroleum asphalt, polyester fiber and vinylon fiber are used in order to impart vibration damping to the steel sheet. And a sheet-shaped damping member 2 made of a composite material of an inorganic filler such as synthetic fiber such as acrylic fiber, latex resin, rubber, talc, calcium carbonate, etc. is used. Generally, a sheet-like member having a substantially rectangular shape with a side of 20 cm to 30 cm is used, and a plurality of these substantially rectangular sheet-like vibration damping members are juxtaposed as necessary, or as necessary. The shape is modified and fused to the steel plate. Further, as shown in FIG. 26, a vibration-damping steel sheet 3 in which a resin composite material 4 is sandwiched and sandwiched between steel plates 3a and pressed into a desired shape, or the like is used. The oil pan 5 is uniformly disposed and used on the entire surface.

[0003]

However, if the above-described substantially rectangular vibration-damping member is installed on almost the entire surface of the steel sheet, it contributes to the vibration-damping property of the steel sheet, but causes a significant increase in weight. You will be invited. For example, the oil pan of an engine mounted on a medium-sized passenger car has a weight of about 2 kg.
These damping members correspond to particularly heavy parts among the components that make up the vehicle, and are a major obstacle in reducing the weight of the vehicle.

The present invention has been made in view of the above-mentioned problems in the prior art, and has as its object to reduce the vibration of a steel plate forming an oil pan of an engine mounted on an automobile or the like by using a vibration damping member. An object of the present invention is to provide a vibration damping structure capable of suppressing the weight increase due to the use of the vibration damping member, that is, reducing the weight as compared with the related art.

[0005]

Means for Solving the Problems The present inventors have conducted intensive studies on the relationship between the damping member and the damping performance in order to solve the above-mentioned problems of the prior art, and as a result, have reduced the weight and sufficiently ensured the damping performance. The installation shape of the damping member was specified, and the present invention was completed.

That is, the vibration damping structure according to the first aspect of the present invention provides a box-shaped vibration-damping member formed by a bottom surface and a side surface that require vibration damping and an opening facing the bottom surface.
A vibration damping structure in which a resin vibration damping member that suppresses vibration of the vibration damped member is attached, wherein the vibration damping member has a surface on the surface of the vibration damped member, each of the bottom surface and the side surface. It is configured to be radially attached from the region where the center of gravity is located to each vertex of the contour lines that define the contours of the bottom surface and the side surface.

According to a second aspect of the present invention, there is provided a vibration-damping structure for a box-shaped vibration-damping member formed by a bottom face and a side face that need damping and an opening facing the bottom face. A vibration damping structure in which a resin damping member that suppresses vibration of a vibration member is stuck, wherein the vibration damping member is located on a surface of the vibration-suppressed member at a position of a center of gravity of each of the bottom surface and the side surface. From the region to be formed to the midpoint of each line segment that defines the outline of the bottom surface and the side surface.

According to a third aspect of the present invention, there is provided a vibration-damping structure for a box-shaped vibration-damping member formed by a bottom face and a side face that require damping and an opening facing the bottom face. A vibration damping structure in which a resin damping member that suppresses vibration of a vibration member is stuck, wherein the vibration damping member is located on a surface of the vibration-suppressed member at a position of a center of gravity of each of the bottom surface and the side surface. From the region to be formed to the respective vertices of the contour lines defining the contours of the bottom surface and the side surface, and radially toward the midpoint of at least one line segment of the contour line.

According to a fourth aspect of the present invention, there is provided a vibration-damping structure for a box-shaped vibration-damping member formed by a bottom face and a side face that need damping, and an opening facing the bottom face. A vibration damping structure in which a resin damping member that suppresses vibration of a vibration member is stuck, wherein the vibration damping member is located on a surface of the vibration-suppressed member at a position of a center of gravity of each of the bottom surface and the side surface. From the region to be formed to the midpoint of each segment of the outline defining the outline of the bottom surface and the side surface, and radially toward at least one vertex of the outlines.

According to a fifth aspect of the present invention, there is provided a vibration damping structure which is formed by a bottom face and a side face that require damping, and an opening facing the bottom face, and wherein the bottom face and at least one of the side faces have a plurality of structures. A damping structure in which a resin damping member for suppressing vibration of the damped member is attached to a box-shaped damped member formed by coupling surfaces, wherein the damping member is Is radially affixed on the surface of the vibration-suppressed member from the region where the center of gravity of each of the constituent surfaces constituting the bottom surface and the side surface is located to each vertex of the contour lines defining the contour of each of the constituent surfaces. It is configured.

According to a sixth aspect of the present invention, there is provided a vibration damping structure which is formed by a bottom face and a side face requiring vibration suppression and an opening facing the bottom face, and wherein at least one of the bottom face and the side face has a plurality of structures. A damping structure in which a resin damping member for suppressing vibration of the damped member is attached to a box-shaped damped member formed by coupling surfaces, wherein the damping member is On the surface of the vibration-suppressed member, from the region where the center of gravity of each of the constituent surfaces constituting the bottom surface and the side surface is located, to the midpoint of each line segment defining the contour of each of the constituent surfaces. And is radially stuck.

According to a seventh aspect of the present invention, there is provided a vibration damping structure comprising a bottom face and a side face which need damping, an opening facing the bottom face, and at least one of the bottom face and the side face having a plurality of structures. A damping structure in which a resin damping member for suppressing vibration of the damped member is attached to a box-shaped damped member formed by coupling surfaces, wherein the damping member is On the surface of the vibration-suppressed member, from the region where the center of gravity of each of the constituent surfaces constituting the bottom surface and the side surface is located, to each vertex of the contour lines defining the contour of each of the constituent surfaces, and It is configured to be radially attached to the midpoint of at least one line segment of the line.

According to another aspect of the present invention, there is provided a vibration damping structure which is formed by a bottom face and a side face requiring vibration suppression and an opening facing the bottom face, and wherein the bottom face and at least one of the side faces have a plurality of structures. A damping structure in which a resin damping member for suppressing vibration of the damped member is attached to a box-shaped damped member formed by coupling surfaces, wherein the damping member is On the surface of the vibration-suppressed member, from the region where the center of gravity of each of the constituent surfaces constituting the bottom surface and the side surface is located, to the midpoint of each line segment defining the contour of each of the constituent surfaces. And at least one vertex of the contour lines is radially stuck.

A vibration damping structure according to a ninth aspect of the present invention is the vibration damping structure according to the first to eighth aspects, wherein the vibration damping member is made of a water-based paint.

According to a tenth aspect of the present invention, there is provided a vibration damping structure,
10. The vibration-damping structure according to claim 9, wherein the water-based paint has a partial area on a surface of the vibration-damped member along a contour defining an area requiring vibration damping so as to have a continuous line shape. It is also configured to be arranged.

[0016]

According to the vibration damping structure according to the first aspect of the present invention, the area where the center of gravity of the vibration-suppressed surface is located, that is, the vibration-damping of the vibration-suppressed surface is required. Because the damping members are attached to the vertices of the contour lines that define the area that needs damping from the center of the area to be damped, for example, to the vertices of the sides in the case of a rectangular shape. , Orthogonal 2
Vibration can be efficiently suppressed for a plurality of order vibration modes in each of the two side directions. Specifically, when the number of antinodes of vibration in one side direction is m, and the number of antinodes of vibration in another side direction orthogonal to this one side is n, particularly in a vibration mode represented as (m, n), , (2,2),
(3,2), (2,3), (3,3), (4,3),
Vibrations in modes such as (3, 4) can be efficiently suppressed.

Further, since the above-mentioned damping member is radially attached not to the whole surface of the surface to be damped but to connect the central portion and each vertex, the weight of the damping structure can be reduced. Can be achieved.

According to the vibration damping structure of the second aspect of the present invention, the vibration is suppressed from the region where the center of gravity of the surface to be damped is located, that is, from the central portion of the region where the surface to be damped needs to be damped. Since the vibration damping member is attached to each midpoint of the line segment of the contour line that defines the area that requires, for example, each midpoint of each side in the case of a rectangular shape, two orthogonal Vibration can be efficiently suppressed with respect to a multi-order vibration mode generated only in each side direction. Specifically, (2, 1),
(1,2), (3,1), (1,3), (4,1),
Vibrations in modes such as (1, 4) can be efficiently suppressed.

Further, since the above-mentioned damping member is radially attached not to the whole surface of the surface to be damped but to connect the center part and each midpoint of each side, the vibration damping member is formed as a vibration damping structure. Lightening can also be achieved.

According to the vibration damping structure of the third aspect of the present invention, the vibration is suppressed from the region where the center of gravity of the surface to be controlled is located, that is, from the central portion of the region where the surface to be controlled requires vibration. The vibration damping member is attached to each vertex of the contour lines that define the area that needs to be, for example, each vertex of each side in the case of a rectangular shape, and at least one or more sides Since the damping member is also attached to the point, (2, 2), (3, 2), (2, 3), (3, 3),
(4,3), (3,4) and other modes of vibration as well as (2,1), (1,2), (3,1), (1,1)
Vibrations in modes 3), (4,1), (1,4), etc. can also be efficiently suppressed.

In addition, the vibration-damping member is radially attached not to the whole surface of the vibration-suppressed surface but to connect a central portion to a vertex of each side and a midpoint of at least one side. It is also possible to achieve weight reduction as a vibration damping structure.

According to the vibration damping structure of the fourth aspect of the present invention, the vibration is suppressed from the region where the center of gravity of the surface to be damped is located, that is, from the central portion of the region where the surface to be damped needs to be damped. The vibration damping member is stuck toward each midpoint of the line segment of the contour line that defines the area requiring the, for example, each midpoint of each side in the case of a rectangular shape, and at least one or more Since the damping member is also attached to the vertices of the sides, (2, 1), (1, 2), (3, 1), (1, 3),
Not only vibrations in modes such as (4, 1) and (1, 4), but also (2, 2), (3, 2), (2, 3), (3,
Vibrations in modes 3), (4,3), (3,4), etc. can also be efficiently suppressed.

The vibration-damping member is radially attached not to the whole surface of the vibration-suppressed surface but to connect a central portion to a midpoint of each side and a vertex of at least one side. Therefore, it is possible to achieve weight reduction as the vibration damping structure.

According to the vibration damping structure of the fifth aspect of the present invention, when the surface to be damped is composed of a plurality of surfaces, the region where the center of gravity of each of the constituting surfaces is located, that is, Since the vibration damping members are stuck from the central portion to the respective vertices of the contour lines that define each constituent surface, as described above, (2, 2), (3,
2), (2,3), (3,3), (4,3), (3,3)
4) Vibration in modes such as can be suppressed efficiently,
Further, by efficiently suppressing the vibration in the constituent surfaces, the vibration of the bottom surface and the side surface formed by these constituent surfaces can also be suppressed efficiently.

Further, since the above-mentioned damping member is affixed partially, not on the entire surface of the surface to be damped, it is possible to achieve weight reduction as a damping structure.

According to the vibration damping structure of the sixth aspect of the present invention, when the surface to be controlled is composed of a plurality of surfaces, the region where the center of gravity of each of the constituent surfaces is located, that is, Since the vibration damping members are attached from the central portion to the respective midpoints of the contour lines defining the respective constituent surfaces, as described above, (2, 1), (1,
2), (3,1), (1,3), (4,1), (1,
4) Vibration in modes such as can be suppressed efficiently,
Further, by efficiently suppressing the vibration in the constituent surfaces, the vibration of the bottom surface and the side surface formed by these constituent surfaces can also be suppressed efficiently.

Further, since the above-mentioned damping member is partially adhered to the surface to be damped, not to the entire surface thereof, the weight of the damping structure can be reduced.

According to the vibration damping structure of the seventh aspect of the present invention, when the surface to be damped is composed of a plurality of surfaces, the region where the center of gravity of each of the constituting surfaces is located, that is, A damping member is stuck from the central portion to each vertex of the contour lines defining each constituent surface, and a damping member is stuck toward at least one or more midpoints of the sides. Therefore, as described above, (2, 2), (3, 2), (2, 3), (3, 3),
(4,3), (3,4) and other modes of vibration as well as (2,1), (1,2), (3,1), (1,1)
3), (4, 1), (1, 4) and other modes of vibration can be efficiently suppressed, and furthermore, by efficiently suppressing vibrations in the component planes, vibrations formed by these component planes can be achieved. Vibrations at the bottom and side surfaces can also be efficiently suppressed.

Further, since the above-mentioned damping member is affixed partially, not on the entire surface of the surface to be damped, it is possible to achieve weight reduction as a damping structure.

According to the vibration damping structure of the eighth aspect of the present invention, when the surface to be controlled is composed of a plurality of surfaces, the region where the center of gravity of each of the constituting surfaces is located, that is, A damping member is stuck from the central portion toward each midpoint of the contour line defining each component surface, and a damping member is stuck toward at least one vertex of one or more sides. Therefore, as described above, (2,1), (1,2), (3,1), (1,3),
Not only vibrations in modes such as (4, 1) and (1, 4), but also (2, 2), (3, 2), (2, 3), (3,
3), (4,3), (3,4) and other modes of vibration can be efficiently suppressed, and furthermore, by efficiently suppressing vibration in the constituent planes, the vibrations formed by these constituent planes can be formed. Vibrations at the bottom and side surfaces can also be efficiently suppressed.

Further, since the above-mentioned damping member is affixed partially, not on the entire surface of the surface to be damped, the weight of the damping structure can be reduced.

According to the vibration damping structure of the ninth aspect of the present invention, since the water-based paint is used as the damping member, the water-based paint is applied to a desired position on the surface of the member to be damped. Thus, a vibration damping member having a desired shape can be easily provided.

According to the vibration damping structure of the tenth aspect of the present invention, when the water-based paint as the vibration damping member is applied on the surface of the member to be damped, a continuous series of the coating is performed using a spray gun or the like. Can be performed, and the productivity in the process of disposing the vibration damping member can be improved.

[0034]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a vibration damping member 11 for an oil pan 10 (box-shaped damped member) of an engine mounted on an automobile.
FIG. 4 is a perspective view showing a vibration damping structure 12 with a stuck pattern. The basic configuration of the oil pan 10 is defined by a bottom surface 10a, side surfaces 10b and 10c, and an opening 10h facing the bottom surface 10a.
Are the constituent surfaces 10a ₁ , 10a ₂ , 10a ₃ , 1
0a ₄ , and constituent surfaces 10c ₁ and 10c _{2. On} these surfaces, each of the contour lines defining the contour of the region from the center of gravity of the region requiring vibration suppression, that is, the central portion 10g. A damping member 11 made of a damping material made of resin is attached so as to radially extend toward the vertex 10d and each midpoint 10e of the contour line (line segment).

As a vibration damping material forming the vibration damping member 11, a water-soluble resin using acryl, acryl-styrene, vinyl acetate, vinyl acetate-acryl, ethylene-vinyl acetate, epoxy, etc., alone or in combination, or , Water-dispersed resin, or emulsion as the main constituent, barium sulfate, calcium carbonate, talc, clay,
A water-based paint composed of water and fillers such as mica and diatomaceous earth, and further filled with calcium carbonate, silica, carbon black, mica, etc. containing styrene, isoprene, styrene copolymer, hydrogenated dicyclopentadiene as main components A water-based paint composed of materials is desirable.

In particular, when a water-based paint is used as the damping material, the damping member 11 can be easily formed into a desired shape. In addition, since the water-based paint can be applied using a device such as a spray gun, productivity can be improved in a production line by continuously applying it to a necessary area.

Here, the shapes of the damping members 31a, 41a and the like to be attached to the box-shaped damped members 30, 40 formed of steel plates will be described with reference to FIGS.

FIG. 2 shows a box-shaped vibration-suppressed member 30,
This shows a case where the region requiring damping is a rectangular bottom surface 30a and side surfaces 30b and 30c. On the surface of the member 30 to be damped, the damping member 31a is provided with a bottom surface 30a and a side surface 30b. It is radially attached so as to extend from the center of gravity position 30g of 30c, that is, the center portion, to a vertex 30d of each side (line segment) as a contour line defining a contour.

As described above, first, the bottom surface 30a and the side surface 3
The reason why the vibration damping member 31a is provided at the central portion of 0b and 30c is that (m, n) = (1, 1) when the number of antinodes of vibration in the respective side directions defining the rectangular shape is m and n.
This is because, in the case of the vibration of the mode represented by the following expression, the amplitude of the central portion is the largest, and therefore, by suppressing the amplitude of the central portion to be small, the vibration or the noise applied to the vibration can be efficiently reduced.

The reason why the vibration damping member 31a is provided so as to connect the central portion 30g and each vertex 30d is that (m, n) is (2, 2), (3, 2), (2, 3), (3,3),
This is because vibrations in modes represented by (4, 3), (3, 4), (4, 4) and the like are efficiently suppressed.

According to the above configuration, the vibration of the vibration-suppressed member 30 can be efficiently suppressed by reducing the weight.

FIG. 3 shows a box-shaped vibration-suppressed member 30,
This shows a case where the area requiring damping is a rectangular bottom surface 30a and side surfaces 30b and 30c. On the surface of the member 30 to be damped, the damping member 31b includes a bottom surface 30a and side surfaces 30b and 30b. It is radially attached so as to extend from the center of gravity 30g of 30c, that is, from the center portion, to each midpoint 30e of each side (line segment) as a contour line defining the contour.

As described above, first, the bottom surface 30a and the side surface 3
The reason why the vibration damping member 31b is provided at the central portion of 0b and 30c is that when the number of antinodes of vibration in each side direction defining a rectangular shape is m and n (m, n) = (1, 1). This is because, in the case of the vibration of the represented mode, the amplitude of the central portion becomes the largest, and therefore, by suppressing the amplitude of the central portion to be small, the vibration or the noise accompanying the vibration can be efficiently reduced.

The reason why the vibration damping member 31b is provided so as to connect the central portion 30g and each midpoint 30e is that (m, n) is (2, 1), (1, 2), (3, 1). , (1,3),
This is for efficiently suppressing the vibration of the mode represented by (4, 1), (1, 4), or the like.

According to the above configuration, the vibration of the vibration-suppressed member 30 can be efficiently suppressed by reducing the weight.

FIG. 4 shows a box-shaped vibration-suppressed member 30,
This shows a case where the area requiring damping is a rectangular bottom surface 30a and side surfaces 30b and 30c. On the surface of the member 30 to be damped, the damping member 31c has a bottom surface 30a and side surfaces 30b and 30b. 30c is radially affixed to each vertex 30d of each side (line segment) as a contour defining a contour from the center of gravity 30g of the center 30c, that is, a center portion, and a part forming the contour. Are radially attached so as to extend toward the midpoint 30e of the side.

As described above, first, the bottom surface 30a and the side surface 3a
The reason why the vibration damping member 31c is provided in the central portion of 0b and 30c is that when the number of antinodes of vibration in each side direction defining a rectangular shape is m and n (m, n) = (1, 1). This is because, in the case of the vibration of the represented mode, the amplitude of the central portion becomes the largest, and therefore, by suppressing the amplitude of the central portion to be small, the vibration or the noise accompanying the vibration can be efficiently reduced.

The reason why the vibration damping member 31c is provided so as to connect the central portion 30g and each vertex 30d is that (m, n) is (2, 2), (3, 2), (2, 3), (3,3),
This is because vibrations in modes represented by (4, 3), (3, 4), (4, 4) and the like are efficiently suppressed.

Further, the reason why the vibration damping member 31c is provided so as to connect the central portion 30g and each of the middle points 30e is (m, n).
Are (2,1), (1,2), (3,1), (1,3),
This is for efficiently suppressing the vibration of the mode represented by (4, 1), (1, 4), or the like.

According to the above configuration, the vibration of the vibration-suppressed member 30 can be efficiently suppressed by reducing the weight.

FIG. 5 shows a box-shaped vibration-suppressed member 30,
This shows a case where the area requiring damping is a rectangular bottom surface 30a and side surfaces 30b and 30c. On the surface of the member 30 to be damped, the damping member 31d has a bottom surface 30a and side surfaces 30b and 30b. 30c are radially attached so as to extend from a center of gravity position 30g of the center 30c, that is, a center point 30e of each side (line segment) as a contour defining the contour from the center portion. Vertex 30 of
It is radially affixed so as to extend toward d.

As described above, first, the bottom surface 30a and the side surface 3
The reason why the vibration damping member 31d is provided at the central portion of 0b and 30c is that when the number of antinodes of vibration in each side direction defining a rectangular shape is m and n (m, n) = (1, 1). This is because, in the case of the vibration of the represented mode, the amplitude of the central portion becomes the largest, and therefore, by suppressing the amplitude of the central portion to be small, the vibration or the noise accompanying the vibration can be efficiently reduced.

Also, the central portion 30g and the midpoint 30e of each side are shown.
The provision of the damping member 31d so as to connect (m,
n) is (2,1), (1,2), (3,1), (1,
This is because vibrations in modes represented by 3), (4, 1), (1, 4) and the like are efficiently suppressed.

Further, the reason why the vibration damping member 31d is provided so as to connect the central portion 30g and each vertex 30d is (m, n).
Are (2,2), (3,2), (2,3), (3,3),
This is because vibrations in modes represented by (4, 3), (3, 4), (4, 4) and the like are efficiently suppressed.

According to the above configuration, the vibration of the vibration-suppressed member 30 can be efficiently suppressed by reducing the weight. FIG.
An oil pan 40 made of a steel plate is used as a box-shaped vibration-suppressed member, and the region of the oil pan 40 that requires vibration damping has a bottom surface 40a and side surfaces 40b, 4 having a substantially rectangular shape.
0c, and the bottom surface 40a is
₁ , 40a ₂ , 40a ₃ , 40a ₄ , and opposing side surfaces 40c have respective constituent surfaces 40c ₁ , 40c _2.
It is composed of

The bottom surface 40a of the oil pan 40
Of the constituent surfaces 40a ₁ , 40a ₂ , 40a ₃ , 4
0a ₄ , side surface 40b, and each side surface 40c forming side surface 40c
0c ₁ and 40c ₂ , the vibration damping member 41a
Similar to that shown in, the constituent surface _40a 1 _{~40a 4, 4}
0c _{1 to} 40c ₂ , and the center of gravity 40g of the side surface 40b, that is, the vertex 40 of each side as a contour from the center portion
It is attached so as to extend toward d.

According to the above configuration, the vibration of the oil pan 40 can be efficiently suppressed while the weight is reduced as in the case shown in FIG.

FIG. 7 shows a case in which an oil pan 40 made of a steel plate is used as a box-shaped damped member.
The bottom surface 40 in which the region requiring vibration suppression of 0 has a substantially rectangular shape
a and side 40b, a 40c, and the bottom surface 40a each of constituent surfaces _{40a 1, 40a 2, 40a 3} , 40a
It consists _4, in which opposite sides 40c are each composed of constituent surfaces _40c 1, 40c _2.

The bottom surface 40a of the oil pan 40
Of the constituent surfaces 40a ₁ , 40a ₂ , 40a ₃ , 4
0a ₄ , side surface 40b, and each side surface 40c forming side surface 40c
0c ₁ and 40c ₂ , the vibration damping member 41b
Similar to that shown in, the constituent surface _40a 1 _{~40a 4, 4}
0c ₁ ~40c _2, and are affixed to extend toward the mid-point 40e of each side of the contour line from the center of gravity position 40g or central portion of the side surface 40b.

According to the above-described structure, vibration of the oil pan 40 can be efficiently suppressed while achieving weight reduction, as in the case shown in FIG.

FIG. 8 shows a case in which an oil pan 40 made of a steel plate is used as a box-shaped damped member.
The bottom surface 40 in which the region requiring vibration suppression of 0 has a substantially rectangular shape
a and side 40b, a 40c, and the bottom surface 40a each of constituent surfaces _{40a 1, 40a 2, 40a 3} , 40a
It consists _4, in which opposite sides 40c are each composed of constituent surfaces _40c 1, 40c _2.

The bottom surface 40a of the oil pan 40
Of the constituent surfaces 40a ₁ , 40a ₂ , 40a ₃ , 4
0a ₄ , side surface 40b, and each side surface 40c forming side surface 40c
0c ₁ and 40c ₂ , the vibration damping member 41c
Similar to that shown in, the constituent surface _40a 1 _{~40a 4, 4}
0c _{1 to} 40c ₂ , and the center of gravity 40g of the side surface 40b, that is, the vertex 40 of each side as a contour from the center portion
It is stuck so as to extend toward d and toward the midpoint 40e of some sides.

According to the above configuration, similarly to the configuration shown in FIG. 4, the vibration of the oil pan 40 can be efficiently suppressed while achieving weight reduction.

FIG. 9 shows a case in which an oil pan 40 made of a steel plate is used as a box-shaped damped member.
The bottom surface 40 in which the region requiring vibration suppression of 0 has a substantially rectangular shape
a and side 40b, a 40c, and the bottom surface 40a each of constituent surfaces _{40a 1, 40a 2, 40a 3} , 40a
It consists _4, in which opposite sides 40c are each composed of constituent surfaces _40c 1, 40c _2.

The bottom surface 40a of the oil pan 40
Of the constituent surfaces 40a ₁ , 40a ₂ , 40a ₃ , 4
0a ₄ , side surface 40b, and each side surface 40c forming side surface 40c
0c ₁ and 40c ₂ , the vibration damping member 41d
Similar to that shown in, the constituent surface _40a 1 _{~40a 4, 4}
0c _{1 to} 40c ₂ , and the center of gravity 40g of the side surface 40b, that is, the vertex 40 of each side as a contour from the center portion
It is attached so as to extend toward d and toward the midpoint 40e of each side.

According to the above configuration, similarly to the configuration shown in FIG. 5, the vibration of the oil pan 40 can be efficiently suppressed while achieving weight reduction.

FIGS. 10 and 11 show a coating method when a water-based paint is used as a vibration damping material. As shown in both figures, on the surface of the vibration-suppressed surface 50 having a rectangular shape, the water-based paint as
Starting from one vertex 50d and passing through all the other vertices 50d with a single stroke, a continuous line shape,
Also, starting from one vertex 50d, all other vertices 50d
It is applied so as to form a continuous line passing through d and all the midpoints 50e with one stroke.

That is, the damping members 51 and 52 are provided with a side 50a (FIG.
0) or some areas along the sides 50a and 50b (see FIG. 11).

With the above configuration, when the water-based paint is applied using a device such as a spray gun, the discharge ON, O, O
There is no need to perform FF, and application can be performed continuously in the ON state. Thereby, the productivity in the production line can be improved.

Next, a vibration damping structure was prepared by attaching a vibration damping member made of various materials and shapes to a box-shaped vibration damping member, and a vibration test was performed on these vibration damping structures to conduct vibration. The result of studying the transfer characteristics will be described.

Here, as the vibrator 110, FIG.
As shown in (a) and (b), a vibration source having a vibration source 111 and a vibration frame 112 that is reciprocated vertically at a high frequency by the vibration source 111 is used. 1
12, the outer peripheral portions of the openings 100h, 200h of the box-shaped vibration damping structures 100, 200 are fixed, and are located at approximately the center of the bottom surfaces 100a, 200a of the fixed vibration damping structures 100, 200. The vibration pickup 113 was mounted on the vibration damping members 102 and 202, and the vibration level was measured. The results are described below as Reference Examples 1 and 2, Examples 1 to 9, and Comparative Example 1.

[0073]

Reference Example 1 As a box-shaped vibration-suppressed member, the short side × long side × height is 300 mm × 500 mm × 200 mm and the plate thickness is 1.6.
As shown in FIG. 13, a damping member 102 made of an asphalt damping material having a thickness of 4 mm is attached on the entire surface of the box-shaped damped member using a steel plate having a thickness of 4 mm. A vibration structure 100 was formed.

Then, with respect to the vibration damping structure 100,
A vibration test was performed using the above-described vibrator 110 to evaluate vibration transmission characteristics.

[0075]

[Reference Example 2] As a box-shaped vibration-suppressed member, the short side × long side × height have the outline dimensions of 300 mm × 500 mm × 200 mm.
As shown in FIG. 14, the oil pan made of a steel plate having a thickness of 1.6 mm was used to cover the entire surface of the oil pan.
A damping member 202 made of an asphalt damping material having a thickness of 2 mm was attached to form a damping structure 200.

Then, for this vibration damping structure 200,
A vibration test was performed using the above-described vibrator 110 to evaluate vibration transmission characteristics.

[0077]

Embodiment 1 As a box-shaped vibration-suppressed member, the short side × long side × height is 300 mm × 500 mm × 200 mm and the plate thickness is 1.6.
mm type steel plate,
On the bottom surface 101a and the side surfaces 101b and 101c of the above, a vibration damping member 102a made of an asphalt vibration damping material having a thickness of 5 mm is formed so as to have a shape as shown in FIG. 15 (a shape connecting the central portion 101g and each vertex 101d). By pasting, the vibration damping structure 103a was formed.

Then, a vibration test was performed on the vibration damping structure 103a using the above-described vibration machine 110 to evaluate the vibration transmission characteristics. As a result, the vibration reduction characteristics were at an excellent level as compared with Reference Example 1 in which the vibration damping member was provided on the entire surface.

[0079]

Embodiment 2 As a box-shaped vibration-suppressed member, the short side × long side × height is 300 mm × 500 mm × 200 mm and the plate thickness is 1.6.
mm type steel plate,
On the bottom surface 101a and the side surfaces 101b and 101c of the above, a damping member 102b made of an asphalt damping material having a thickness of 5 mm so as to have a shape as shown in FIG. 16 (a shape connecting the central portion 101g and each midpoint 101e). To form a vibration damping structure 103b.

Then, a vibration test was performed on the vibration damping structure 103b using the above-described vibration machine 110 to evaluate the vibration transmission characteristics. As a result, the vibration reduction characteristics were at an excellent level as compared with Reference Example 1 in which the vibration damping member was provided on the entire surface.

[0081]

Embodiment 3 As a box-shaped vibration-suppressed member, the short side × long side × height is 300 mm × 500 mm × 200 mm and the plate thickness is 1.6.
mm type steel plate,
On the bottom surface 101a and the side surfaces 101b and 101c, a damping material made of an asphalt vibration damping material having a thickness of 5 mm is formed so as to have a shape as shown in FIG. 17 (a shape connecting the central portion 101g with each vertex 101d and the middle point 101e). The vibration member 102c was attached to form the vibration damping structure 103c.

Then, a vibration test was performed on the vibration damping structure 103c using the above-described vibration machine 110 to evaluate the vibration transmission characteristics. As a result, the vibration reduction characteristics were at a very excellent level as compared with Reference Example 1 in which the vibration damping member was provided on the entire surface.

[0083]

Embodiment 4 As a box-shaped vibration-suppressed member, a short side × long side × height is 300 mm × 500 mm × 200 mm and a plate thickness is 1.6.
mm type steel plate,
The bottom surface 101a and the side surfaces 101b and 101c are made of an asphalt vibration damping material having a thickness of 5 mm so as to have a shape as shown in FIG. 18 (a shape connecting the central portion 101g with each vertex 101d and each middle point 101e). The damping member 102d was attached to form the damping structure 103d.

Then, a vibration test was performed on this vibration damping structure 103d using the above-described vibration machine 110 to evaluate the vibration transmission characteristics. As a result, the vibration reduction characteristics were at a very excellent level as compared with Reference Example 1 in which the vibration damping member was provided on the entire surface.

[0085]

Embodiment 5 As a box-shaped vibration-suppressed member, the short side × long side × height have the outline dimensions of 300 mm × 500 mm × 200 mm.
Using an oil pan 201 made of a steel plate having a thickness of 1.6 mm,
The bottom surface 201a of the oil pan 201 (the constituent surface 201a)
_{1, 201a 2, 201a 3,} 201a 4) and side 2
01b and 201c (configuration surfaces 201c ₁ and 201c ₂ ) have a thickness of 5 m so as to have a shape as shown in FIG. 19 (a shape connecting the central portion 201g and each vertex 201d).
A damping member 202a made of m asphalt damping material was attached to form a damping structure 203a.

Then, a vibration test was performed on the vibration-damping structure 203a using the above-described vibrator 110 to evaluate the vibration transmission characteristics. As a result, the vibration reduction characteristics were at an excellent level as compared with Reference Example 2 in which the vibration damping member was provided on the entire surface.

[0087]

Embodiment 6 As a box-shaped vibration-suppressed member, a short side × long side × height has an outline dimension of 300 mm × 500 mm × 200 mm.
Using an oil pan 201 made of a steel plate having a thickness of 1.6 mm,
The bottom surface 201a of the oil pan 201 (the constituent surface 201a)
_{1, 201a 2, 201a 3,} 201a 4) and side 2
01b and 201c (constituting surfaces 201c ₁ and 201c ₂ ), the shape shown in FIG. 20 (the central portion 201 of each surface constituting the bottom surface 201a and the side surfaces 201b and 201c).
g and each middle point 201e) so as to form a vibration damping member 202 made of an asphalt vibration damping material having a thickness of 5 mm.
b was attached to form the vibration damping structure 203b.

Then, a vibration test was performed on the vibration damping structure 203b using the above-described vibration machine 110 to evaluate the vibration transmission characteristics. As a result, the vibration reduction characteristics were at an excellent level as compared with Reference Example 2 in which the vibration damping member was provided on the entire surface.

[0089]

Embodiment 7 As a box-shaped vibration-suppressed member, the short side × long side × height have the outline dimensions of 300 mm × 500 mm × 200 mm.
Using an oil pan 201 made of a steel plate having a thickness of 1.6 mm,
The bottom surface 201a of the oil pan 201 (the constituent surface 201a)
_{1, 201a 2, 201a 3,} 201a 4) and side 2
01b and 201c (constituent surfaces 201c ₁ and 201c ₂ ), the shape shown in FIG. 21 (the central portion 201 of each surface constituting the bottom surface 201a and the side surfaces 201b and 201c).
A vibration damping member 202c made of an asphalt vibration damping material having a thickness of 5 mm was attached to form a vibration damping structure 203c so as to have a shape that connects g with each vertex 201d and the middle point 201e.

Then, a vibration test was performed on the vibration damping structure 203c using the above-described vibration machine 110 to evaluate the vibration transmission characteristics. As a result, the vibration reduction characteristics were at a very excellent level as compared with Reference Example 2 in which the vibration damping member was provided on the entire surface.

[0091]

Embodiment 8 As a box-shaped vibration-suppressed member, the short side × long side × height have the outline dimensions of 300 mm × 500 mm × 200 mm.
Using an oil pan 201 made of a steel plate having a thickness of 1.6 mm,
The bottom surface 201a of the oil pan 201 (the constituent surface 201a)
_{1, 201a 2, 201a 3,} 201a 4) and side 2
01b and 201c (constituent surfaces 201c ₁ and 201c ₂ ), the shape shown in FIG. 22 (the central portion 201 of each surface constituting the bottom surface 201a and the side surfaces 201b and 201c).
g, the shape connecting each vertex 201g and each middle point 201e)
A vibration damping member 202d made of an asphalt vibration damping material having a thickness of 5 mm is stuck so that the vibration damping structure 203d
Was formed.

Then, a vibration test was performed on the vibration damping structure 203d using the above-described vibration machine 110 to evaluate the vibration transmission characteristics. As a result, the vibration reduction characteristics were at a very excellent level as compared with Reference Example 2 in which the vibration damping member was provided on the entire surface.

[0093]

Embodiment 9 As a box-shaped vibration-suppressed member, the short side × long side × height has an outline dimension of 300 mm × 500 mm × 200 mm.
Using an oil pan 201 made of a steel plate having a thickness of 1.6 mm,
The bottom surface 201a of the oil pan 201 (the constituent surface 201a)
_{1, 201a 2, 201a 3,} 201a 4) and side 2
01b and 201c (constituent surfaces 201c ₁ and 201c ₂ ), the shape shown in FIG. 23 (the central portion 201 of each surface constituting the bottom surface 201a and the side surfaces 201b and 201c).
g, the shape connecting each vertex 201d and each middle point 201e)
Then, a vibration damping member 202e made of a water-based paint having a thickness of 5 mm was attached (applied) to form a vibration damping structure 203e.

The water-based paint used here was an emulsion composed of acrylic / styrene / vinyl acetate 25%, pigment 1
2.5%, mica 21%, additive 13.5%, water 28%
It consisted of

Then, a vibration test was performed on the vibration-damping structure 203e using the above-described vibrator 110 to evaluate the vibration transmission characteristics. As a result, the vibration reduction characteristics were at a very excellent level as compared with Reference Example 2 in which the vibration damping member was provided on the entire surface.

[0096]

[Comparative Example 1] As a box-shaped vibration-suppressed member, the short side × long side × height have an outline dimension of 300 mm × 500 mm × 200 mm.
Using an oil pan 201 made of a steel plate having a thickness of 1.6 mm,
The bottom surface 201a of the oil pan 201 (the constituent surface 201a)
_{1, 201a 2, 201a 3,} 201a 4) and side 2
01b and 201c (constituting surfaces 201c ₁ and 201c ₂ ) so as to have a shape as shown in FIG. 24 (a frame shape disposed along the contour of each surface constituting the bottom surface 201a and the side surfaces 201b and 201c). Then, a vibration damping member 202f made of an asphalt vibration damping material having a thickness of 5 mm was attached to form a vibration damping structure 203f.

Then, a vibration test was performed on the vibration damping structure 203f using the above-described vibration machine 110 to evaluate the vibration transmission characteristics. As a result, the vibration reduction characteristics were inferior to those of Reference Example 2 in which the vibration damping member was provided on the entire surface.

The results obtained above are summarized in Table 1. In Table 1, all the numerical values are relative values expressed as percentages when the values of Reference Examples 1 and 2 are set to 100, the mark ○ indicates a level superior to those of Reference Examples 1 and 2, and the mark ◎ indicates a reference. A very good level compared to Examples 1 and 2,
The crosses indicate levels inferior to those of Reference Examples 1 and 2, respectively.

[0099]

[Table 1]

In the embodiment described above, the case where the oil pan of the engine mounted on the automobile is used as the damped member constituting the vibration damping structure has been described, but the present invention is not limited to this. If it requires vibration damping, it can also be used for engine oil pans mounted on motorcycles, or other vehicles such as electric trains, and even box-type structures used in factory facilities. Applicable.

[Brief description of the drawings]

FIG. 1 shows an embodiment in which a vibration damping structure according to the present invention is applied to an oil pan of an engine mounted on an automobile, (a) is a perspective view from an opening side, and (b) is a perspective view. It is a perspective view from the bottom side.

FIGS. 2A and 2B show one embodiment of an arrangement shape of a vibration damping member according to the present invention, wherein FIG. 2A is a perspective view and FIG. 2B is a bottom view.

FIGS. 3A and 3B show an embodiment of an arrangement shape of a vibration damping member according to the present invention, wherein FIG. 3A is a perspective view and FIG. 3B is a bottom view.

FIGS. 4A and 4B show an embodiment of an arrangement shape of a vibration damping member according to the present invention, wherein FIG. 4A is a perspective view and FIG. 4B is a bottom view.

FIGS. 5A and 5B show an embodiment of an arrangement shape of a vibration damping member according to the present invention, wherein FIG. 5A is a perspective view and FIG. 5B is a bottom view.

FIGS. 6A and 6B show an embodiment of an arrangement shape of a vibration damping member according to the present invention, wherein FIG. 6A is a perspective view and FIG. 6B is a bottom view.

FIGS. 7A and 7B show an embodiment of an arrangement shape of the damping member according to the present invention, wherein FIG. 7A is a perspective view and FIG. 7B is a bottom view.

FIGS. 8A and 8B show an embodiment of an arrangement shape of the vibration damping member according to the present invention, wherein FIG. 8A is a perspective view and FIG. 8B is a bottom view.

FIGS. 9A and 9B show an embodiment of an arrangement shape of the vibration damping member according to the present invention, wherein FIG. 9A is a perspective view and FIG. 9B is a bottom view.

FIG. 10 is a plan view showing an embodiment of an arrangement shape of a vibration damping member according to the present invention.

FIG. 11 is a plan view showing an example of an arrangement shape of a vibration damping member according to the present invention.

FIGS. 12A and 12B show a vibrator used in a vibration test, wherein FIG. 12A is an external perspective view and FIG. 12B is a side view.

13A and 13B are diagrams illustrating an arrangement shape of a vibration damping member in Reference Example 1, where FIG. 13A is a perspective view and FIG. 13B is a bottom view.

14A and 14B are diagrams illustrating an arrangement shape of a vibration damping member in Reference Example 2, in which FIG. 14A is a perspective view when viewed from an opening side.
Is a perspective view seen from the bottom side.

FIGS. 15A and 15B show an arrangement shape of the vibration damping member in the first embodiment, where FIG. 15A is a perspective view and FIG. 15B is a bottom view.

16 (a) and 16 (b) show the arrangement and shape of the vibration damping member according to the second embodiment. FIG. 16 (a) is a perspective view and FIG. 16 (b) is a bottom view.

17 (a) and 17 (b) show the arrangement and shape of the damping member according to the third embodiment. FIG. 17 (a) is a perspective view and FIG. 17 (b) is a bottom view.

FIGS. 18A and 18B are diagrams illustrating an arrangement shape of a vibration damping member according to the fourth embodiment, where FIG. 18A is a perspective view and FIG. 18B is a bottom view.

FIGS. 19A and 19B show an arrangement shape of the vibration damping member in the fifth embodiment, where FIG.
(B) is a perspective view seen from the bottom surface side.

FIGS. 20A and 20B are diagrams illustrating an arrangement shape of a vibration damping member according to the sixth embodiment, in which FIG.
(B) is a perspective view seen from the bottom surface side.

FIGS. 21A and 21B are diagrams illustrating an arrangement shape of a vibration damping member according to a seventh embodiment, in which FIG.
(B) is a perspective view seen from the bottom surface side.

FIGS. 22A and 22B are diagrams illustrating an arrangement shape of a vibration damping member according to the eighth embodiment, where FIG.
(B) is a perspective view seen from the bottom surface side.

FIGS. 23A and 23B are diagrams illustrating an arrangement shape of a vibration damping member according to a ninth embodiment, where FIG.
(B) is a perspective view seen from the bottom surface side.

24A and 24B show an arrangement shape of a vibration damping member in Comparative Example 1, wherein FIG. 24A is a perspective view seen from an opening side,
(B) is a perspective view seen from the bottom surface side.

FIG. 25 is a perspective view showing the arrangement of a vibration damping member in a conventional oil pan, where (a) is a perspective view as viewed from an opening side and (b) is a perspective view as viewed from a bottom side.

26A and 26B show a conventional oil pan using a damping steel plate, where FIG. 26A is a perspective view as viewed from the opening side, and FIG.
FIG. 4 is a cross-sectional view taken along the line EE in FIG.

[Explanation of symbols]

10 an oil pan (object to be vibration damping member) 10a bottom surface _{10a 1, 10a 2, 10a 3} , 10a 4 structure surface 10b, 10c side 10c _1, 10c ₂ constituent surface 10d apex 10e midpoint 10g gravity center position 11 the damping member 12 damping structure 30 be damped member 30a bottom surface 30b, 30c side 30d apex 30e midpoint 30g centroid position 31a, 31b, 31c, 31d damping member 40 oil pan (the damping member) 40a bottom surface _{40a 1,} 40a 2, 40a ₃ , 40a ₄ structure surface 40b, 40c side 40c _1, 40c ₂ constituent surface 40d apex 40e midpoint 40g centroid position 41a, 41b, 41c, 41d damping member 50d apex 50e midpoint 50g barycentric position 51 and 52 the vibration damping member 100 system Vibration structure 100a Bottom surface 100h Opening 101 Damped member 101 Bottom surface 101b, 101c Side surface 101d Vertex 101e Midpoint 101g Center of gravity position 102 Damping member 102a, 102b, 102c, 102d Damping member 103a, 103b, 103c, 103d Damping structure 200 Oil pan (damped member) 200a Bottom 200h opening 201 oil pan (the damping member) 201a bottom _{201a 1, 201a 2, 201a 3} , 201a 4 structure surface 201b, 201c side 201c _1, 201c ₂ configured surface 201d vertex 201c midpoint 201g centroid position 202 and 202, 202b , 202c, 202d, 2
02e, 202f Damping members 203a, 203b, 203c, 203d, 203e,
203f damping structure

Claims (10)

[Claims] 1. A vibration damper made of resin for suppressing a vibration of a vibration-suppressed member against a box-shaped vibration-suppressed member formed by a bottom surface and a side surface requiring vibration suppression and an opening facing the bottom surface. A vibration damping structure having a member attached thereto, wherein the vibration damping member defines contours of the bottom surface and the side surface from a region where a center of gravity of each of the bottom surface and the side surface is located on a surface of the vibration-suppressed member. A vibration damping structure characterized by being radially stuck to each vertex between contour lines. 2. A resin-made vibration damper that suppresses vibration of a vibration-suppressed member against a box-shaped vibration-suppressed member formed by a bottom surface and a side surface requiring vibration suppression and an opening facing the bottom surface. A vibration damping structure having a member attached thereto, wherein the vibration damping member defines contours of the bottom surface and the side surface from a region where a center of gravity of each of the bottom surface and the side surface is located on a surface of the vibration-suppressed member. A vibration damping structure characterized by being radially stuck toward a midpoint of each segment of a contour line. 3. A resin-made vibration damper that suppresses vibration of a vibration-suppressed member against a box-shaped vibration-suppressed member formed by a bottom surface and a side surface requiring vibration suppression and an opening facing the bottom surface. A vibration damping structure having a member attached thereto, wherein the vibration damping member defines contours of the bottom surface and the side surface from a region where a center of gravity of each of the bottom surface and the side surface is located on a surface of the vibration-suppressed member. A vibration damping structure which is radially attached to each vertex of the contour lines and to a midpoint of at least one line segment of the contour lines. 4. A vibration damper made of resin for suppressing a vibration of the vibration-suppressed member with respect to a box-shaped vibration-suppressed member formed by a bottom surface and a side surface requiring vibration suppression and an opening facing the bottom surface. A vibration damping structure having a member attached thereto, wherein the vibration damping member defines contours of the bottom surface and the side surface from a region where a center of gravity of each of the bottom surface and the side surface is located on a surface of the vibration-suppressed member. A vibration damping structure characterized by being radially stuck toward a midpoint of each segment of a contour and toward at least one vertex of the contours. 5. A box-shaped controlled member formed by a bottom face and a side face requiring vibration suppression and an opening facing the bottom face, and wherein the bottom face and at least one of the side faces are formed by combining a plurality of constituent faces. A vibration damping structure in which a vibration damping member made of a resin that suppresses vibration of the vibration damped member is attached to the vibration damping member, wherein the vibration damping member is provided on a surface of the vibration damped member. A vibration damping structure characterized by being radially stuck from a region where a center of gravity of each of the constituent surfaces constituting the bottom surface and the side surface is located to each vertex of contour lines defining the contour of each of the constituent surfaces. body. 6. A box-shaped controlled member formed by a bottom face and a side face requiring vibration suppression and an opening facing the bottom face, and wherein at least one of the bottom face and the side face is formed by coupling a plurality of constituent faces. A vibration damping structure in which a vibration damping member made of a resin that suppresses vibration of the vibration damped member is attached to the vibration damping member, wherein the vibration damping member is provided on a surface of the vibration damped member. It is characterized by being radially stuck from the region where the center of gravity of each of the constituent surfaces constituting the bottom surface and the side surface is located toward the midpoint of each segment of the contour line that defines the contour of each of the constituent surfaces. Damping structure. 7. A box-shaped controlled member formed by a bottom surface and a side surface requiring vibration suppression and an opening facing the bottom surface, and at least one of the bottom surface and the side surface is formed by coupling a plurality of constituent surfaces. A vibration damping structure in which a vibration damping member made of a resin that suppresses vibration of the vibration damped member is attached to the vibration damping member, wherein the vibration damping member is provided on a surface of the vibration damped member. At least one of the contour lines is directed from the region where the center of gravity of each of the constituent surfaces constituting the bottom surface and the side surface is located to each vertex of the contour lines defining the contour of each of the constituent surfaces.
A vibration damping structure characterized by being radially stuck toward the midpoint of two line segments. 8. A box-shaped controlled member formed by a bottom surface and a side surface requiring vibration suppression and an opening facing the bottom surface, and at least one of the bottom surface and the side surface is formed by coupling a plurality of constituent surfaces. A vibration damping structure in which a vibration damping member made of a resin that suppresses vibration of the vibration damped member is attached to the vibration damping member, wherein the vibration damping member is provided on a surface of the vibration damped member. From the region where the center of gravity of each of the constituent surfaces constituting the bottom surface and the side surface is located to the midpoint of each of the contour lines defining the contour of each of the constituent surfaces, and to at least one vertex of the contour lines A vibration damping structure characterized by being radially stuck toward. 9. The damping structure according to claim 1, wherein the damping member is made of a water-based paint. 10. The water-based paint is also provided on a part of the surface of the member to be damped, which is along a contour defining a region that requires damping so as to have a continuous line shape. The vibration damping structure according to claim 9, wherein: