JP2024002047A - Vibration control device, motor and inverter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control device with excellent performance.

SOLUTION: A vibration control device (100) according to one embodiment may comprise: a fixed part (110) including a plate-shaped portion and attached to vibration control objects (10, 502, 602); an elastic part (120) connected to the fixed part (110), extending radially from the fixed part (110), and formed of an elastic material; and a mass part (130) connected to the elastic part (120), extending so as to surround the elastic part (120), and having mass.

SELECTED DRAWING: Figure 2

COPYRIGHT: (C)2024,JPO&INPIT

Description

The technology disclosed in the present application relates to a vibration damping device that is attached to a damped object and suppresses vibrations and/or noise of the damped object.

2. Description of the Related Art Conventionally, various damping devices have been known that are attached to a damped object in order to suppress vibration and/or noise of the damped object.

Patent Document 1 discloses that a dynamic vibration damping device (vibration damping device) configured in a cantilever shape by combining a plurality of parts is attached to a housing of a motor, which is a vibration damping object.

Moreover, Patent Document 2 and Patent Document 3 disclose that an insulation jacket is attached to a housing of a motor, which is an object to be damped, so as to cover the outer surface of the housing.

Japanese Patent Application Publication No. 2013-061058 Japanese Patent Application Publication No. 2009-014146 Japanese Patent Application Publication No. 2016-127621

However, since the vibration damping device disclosed in Patent Document 1 is composed of a plurality of component parts, there is a possibility of loosening between the component parts under vibration, and it is also disadvantageous in terms of cost and strength. It is. Further, since such a vibration damping device has an asymmetrical shape with respect to the attachment point to the vibration damping object, a moment may be generated at this attachment point, which may therefore become a new source of vibration.

On the other hand, the insulation jacket disclosed in Non-Patent Document 1 is attached to the vibration-damping object so as to cover the outer surface of the housing of the vibration-damping object, so that the vibration-damping object itself is equipped with such an insulation jacket. increases in size.

Accordingly, various embodiments disclosed in the present application provide a damping device with improved performance to address at least some of these prior art problems.

A vibration damping device according to one aspect includes a fixing portion that includes a plate-shaped portion and is attached to a vibration damping object;
an elastic part connected to the fixed part, extending radially from the fixed part, and formed of an elastic material;
A mass part connected to the elastic part, extending so as to surround the elastic part, and having mass can be provided.

Various embodiments disclosed in this application can provide a damping device with improved performance.

FIG. 1 is a schematic diagram showing an overview of a vibration damping device according to an embodiment. FIG. 1 is a perspective view schematically showing an example of the configuration of a vibration damping device 100 according to an embodiment. 3 is a perspective view schematically showing various examples of elastic parts 120 included in the vibration damping device 100 shown in FIG. 2. FIG. FIG. 3 is a perspective view schematically showing another example of the configuration of the elastic section in the vibration damping device 100 shown in FIG. 2. FIG. FIG. 3 is a perspective view schematically showing another example of the configuration of the elastic section in the vibration damping device 100 shown in FIG. 2. FIG. FIG. 3 is a perspective view schematically showing another example of the configuration of the elastic section in the vibration damping device 100 shown in FIG. 2. FIG. FIG. 3 is a perspective view schematically showing another example of the configuration of the mass part in the vibration damping device 100 shown in FIG. 2. FIG. FIG. 3 is a perspective view schematically showing another example of the configuration of the mass part in the vibration damping device 100 shown in FIG. 2. FIG. FIG. 3 is a perspective view schematically showing another example of the configuration of the mass part in the vibration damping device 100 shown in FIG. 2. FIG. FIG. 9 is a perspective view schematically showing an inverter, which is a vibration damping object, to which the vibration damping device 100 shown in FIGS. 2 to 9 is attached. FIG. 9 is a perspective view schematically showing a motor, which is an object to be damped, to which the damping device 100 shown in FIGS. 2 to 9 is attached.

Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. Note that common components in the drawings are given the same reference numerals. Also, it should be noted that components depicted in one drawing may be omitted from another drawing for convenience of explanation. Furthermore, it should be noted that the attached drawings are not necessarily drawn to scale.

1. Overview FIG. 1 is a schematic diagram showing an overview of a vibration damping device according to an embodiment. On the left side of FIG. 1, a part 10 of the damping object is schematically shown, and on the right side of FIG. 1, the part 10 of the damping object and an embodiment attached to this part 10 A vibration damping device 100 according to the present invention is schematically shown.

Here, the object to be damped is any part mounted on a vehicle, and may include, without limitation, a motor (electric motor), an inverter, and/or an engine (internal combustion engine), etc. can. Further, the part 10 of the vibration damping object includes a housing or a part of the housing, a case or a part of the case, a casing or a part of the casing, and/or a lid or a part of the lid, etc. It can be included without being limited to these.

Focusing on the left side of FIG. 1, when the damping device 100 is not attached, the part 10 of the vibration damping object is supported by, for example, a plurality of support points 12, and is located at an upper position 14 and a lower position. It can oscillate between 16 and 16.

Focusing on the right side of FIG. 1, the vibration damping device 100 can be attached to a portion of the portion 10 of the vibration damping object that has a large amplitude during vibration (for example, the center portion of the portion 10). The damping device 100 is capable of at least partially suppressing vibrations and/or noise occurring in the portion 10 of the damping object by vibrating in place of (sacrificing) the portion 10 of the damping object. can.

2. Configuration example of vibration damping device 100 according to one embodiment FIG. 2 is a perspective view schematically showing an example of the configuration of vibration damping device 100 according to one embodiment. As shown in FIG. 2, the vibration damping device 100 can include a fixed part 110, an elastic part 120, and a mass part 130.

2-1. Fixed part 110
The fixing part 110 may be a part attached to (the part 10) of the object to be damped. The fixing part 110 may include a plate-shaped part. As an example, the fixing part 110 may be formed of a plate-like member having a substantially circular shape.

The fixing part 110 can be fixed to the vibration damping object (part 10) by a method such as adhesion or welding. In this case, at least a portion of the back surface of the fixing portion 110, which is not shown in FIG. 2, for example, may be fixed to the vibration damping object.

Instead of or in addition to this, the fixing part 110 allows a convex part (not shown) provided on the object to be damped to pass through a through hole penetrating the central part 112 of the fixing part 110, for example. It can be fixed to the object to be damped by tightening or by using a bolt (not shown) that is screwed into the convex portion.

Alternatively, the fixing part 110 can be fixed to the object to be damped, for example by using a screw or bolt passing through the central part 112 thereof.

Further, the fixing part 110 may be formed of a material selected from a group including iron, copper, stainless steel, aluminum, and/or duralumin.

Further, the fixing part 110 may have a point-symmetrical shape with respect to a region where the fixing part 110 is attached to the vibration damping object, for example, a center portion 112.

2-2. Elastic part 120
The elastic part 120 may be connected to the fixing part 110 and may be formed to extend radially from the fixing part 110. Elastic portion 120 may be formed of any elastic material. For example, the elastic portion 120 may be formed of a material selected from the group including iron, copper, stainless steel, aluminum, duralumin, and the like.

In the example shown in FIG. 2, the elastic part 120 can include a plurality of (for example, six) plate-like members 122 that extend radially from the fixed part 110. Each of these plate-like members 122 may be further arranged such that one end thereof is coupled to the fixed part 110 and the other end located above the one end is coupled to the mass part 130. However, the configuration shown in FIG. 2 is just an example, and the number of plate-like members 122 included in the elastic section 120 depends on the target natural frequency of the vibration damping device 100, as illustrated in FIG. can be set to any number from 0 to a plurality of values. Moreover, the width of each plate-like member 122 of the elastic part 120 can be set according to the target natural frequency of the vibration damping device 100, as illustrated in FIG. Note that the relationship between the elastic portion 120 and the target natural frequency of the vibration damping device 100 will be described later.

Further, the elastic portion 120 may have a point-symmetrical shape with respect to a region where the fixed portion 110 is attached to the vibration damping object, for example, the center portion 112.

Further, the elastic part 120 may be formed to be continuously connected to the fixing part 110.

2-3. Mass part 130
Mass portion 130 may be connected to elastic portion 120 and extend to surround elastic portion 120 . Specifically, as illustrated in FIG. (the outer end of the outer end and the inner end located on the inner side).

Mass portion 130 may be formed of any material. For example, mass portion 130 may be formed of a material selected from the group including iron, copper, stainless steel, aluminum, duralumin, and the like.

The mass portion 130 has a mass that corresponds to the target natural frequency of the vibration damping device 100. Note that the relationship between the mass of the mass portion 130 and the target natural frequency of the vibration damping device 100 will be explained later.

Further, the mass portion 130 may have a point-symmetrical shape with respect to a region where the fixed portion 110 is attached to the vibration damping object, for example, the center portion 112.

Furthermore, the mass part 130 may be formed so as to be continuously connected to (the plate-like members 122 of) the elastic part 120. In a stationary state, as described above, the other end (the end coupled to the mass section 130) of each plate member 122 of the elastic section 120 is located above the other end (the end coupled to the fixed section 110). Due to this position, the mass part 130 can be located above the fixed part 110.

2-4. Relationship between the natural frequency and the mass section 130 and the elastic section 120 Next, the relationship between the target natural frequency of the damping device 100 and the mass section 130 and the elastic section 120 will be described.

The vibration damping device 100 may be formed to have a natural frequency assumed (measured) in the object to be damped. That is, the damping device 100 can be formed to have the same or substantially the same natural frequency as the natural frequency of the object to be damped. Specifically, the natural frequency of the damped object, that is, the targeted natural frequency f in the damping device 100 can be expressed by the following formula.

f=k/m
Here, the rigidity k is determined from the rigidity of the elastic part 120 and the rigidity of the mass part 130 in the damping device 100, and may be approximately the rigidity of the elastic part 120. Further, the mass m is determined from the mass of the mass section 130 and the mass of the elastic section 120 in the vibration damping device 100, and may be approximately the mass of the mass section 130.

For example, the rigidity k can be increased by increasing the thickness of the elastic portion 120 and/or the mass portion 130. This may also increase the natural frequency f. As an example, referring to FIG. 3, the rigidity k can be increased by increasing the thickness of each plate member 122 of the elastic section 120. This may also increase the natural frequency f.

Conversely, the rigidity k can be reduced by setting the thickness of the elastic part 120 and/or the thickness of the mass part 130 small. This may also reduce the natural frequency f. As an example, referring to FIG. 3, the stiffness k can be reduced by setting the thickness of each plate member 122 of the elastic section 120 to be small. This may also reduce the natural frequency f.

Furthermore, for example, the mass m can be reduced by setting the thickness or size of the mass part 130 and/or the thickness or size of the elastic part 120 small. This allows the natural frequency f to increase.

Conversely, for example, the mass m can be increased by increasing the thickness or size of the mass section 130 and/or the elastic section 120. Thereby, the natural frequency f can be reduced.

In one embodiment, the stiffness k may be determined from the stiffness of the elastic section 120 and the stiffness of the mass section 130, as described above. In another embodiment, the stiffness k may be the stiffness of the elastic part 120, considering that the contribution of the stiffness of the mass part 130 to the natural frequency f is small.

In one embodiment, mass m may be determined from the mass of mass portion 130 and the mass of elastic portion 120, as described above. In another embodiment, the mass m may be the mass of the mass section 130, considering that the contribution of the mass of the elastic section 120 to the natural frequency f is small.

Note that the fixed part 110, the elastic part 120, and the mass part 130 can also be formed as one continuous member.

3. Operation As described above with reference to FIG. 1, the vibration damping device 100 is fixed to the vibration damping object (part 10, etc.) by attaching the fixing part 110 to the damping object (part 10, etc.). can be done. In this state, if vibration occurs in the damped object (part 10), the vibration damping device 100 can vibrate at the expense of the damped object (part 10). Specifically, referring to FIG. 2, the mass part 130 and the elastic part 120 can vibrate in the vertical direction on the paper with the fixed part 110 attached to the object to be damped as a support point. That is, the mass part 130 can vibrate in the vertical direction on the paper while being supported by the elastic part 120 coupled to the fixed part 110. Thereby, it is possible to suppress a phenomenon in which the vibration damping object (part 10) generates vibration and/or noise.

4. Variant
4-1. Method for Changing the Stiffness of the Elastic Part 120 The stiffness of the elastic part 120 can affect the natural frequency of the damping device 100, as described above. The rigidity of the elastic portion 120 can be changed by various methods as exemplified below.

FIG. 4 is a perspective view schematically showing another example of the configuration of the elastic part in the vibration damping device 100 shown in FIG. 2. As shown in FIG. 4, at least one plate member 122A included in the elastic portion 120A has at least one plate member 122A (in FIG. ) may include a first rib 124A. Thereby, the elastic part 120A can have "increased" rigidity compared to the case where the first rib 124A is not included. The first rib 124A can be formed of a material selected from the group including iron, copper, stainless steel, aluminum, and/or duralumin, and can be formed by press molding, adhesion, welding, etc. It can be formed or fixed to the elastic portion 120A by the method described above.

Note that the first rib 124A can extend to the area of the mass part 130 as illustrated in FIG. 4, or can terminate before the area of the mass part 130. Similarly, the first rib 124A can extend to the area of the fixing part 110, as illustrated in FIG. 4, or can terminate before the area of the fixing part 110.

FIG. 5 is a perspective view schematically showing another example of the configuration of the elastic portion in the vibration damping device 100 shown in FIG. 2. As shown in FIG. 5, at least one plate-like member 122B included in the elastic portion 120B extends along a direction (e.g., circumferential direction) that intersects the extending direction (e.g., radial direction) of this plate-like member 122B. At least one (three in FIG. 5) second ribs 124B can be included. As a result, the elastic portion 120B can have “decreased” rigidity compared to the case where the second rib 124B is not included. The first rib 124A can be formed of a material selected from the group including iron, copper, stainless steel, aluminum, and/or duralumin, and can be formed by press molding, adhesion, welding, etc. It can be formed or fixed to the elastic portion 120A by the method described above.

FIG. 6 is a perspective view schematically showing another example of the configuration of the elastic section in the vibration damping device 100 shown in FIG. 2. As shown in FIG. 6, at least one plate member 122C included in the elastic portion 120C has a first end 122C ₁ extending along the extending direction (for example, radial direction) of the plate member 122C, and The second end 122C 2 extends on the opposite side from the first end 122C ₁ along the extending direction (eg, radial direction) of _the shaped member 122C.

As illustrated in FIG. 6, this plate member 122C can include a first bent portion 124C that is bent at the first end 122C ₁ toward the second end 122C ₂ . Alternatively or _in addition to this, although not shown in _FIG . It is also possible to include a portion 126C. Thereby, the elastic portion 120C can have “increased” rigidity compared to the case where the first bent portion 124C (or the second bent portion 126C) is not included.

Note that when focusing on the first bent portion 124C and/or the second bent portion 126C, for example, a method of forming the hole H by punching out a region corresponding to the hole H in a single piece of arbitrary material (FIG. , 3, 4, 5, etc.), the first bent portion 124C and/or the first bent portion 124C and/or It can be used as the second bent portion 126C.

4-2. Method for changing the mass of the mass section 130 As described above, the mass of the mass section 130 can influence the natural frequency of the vibration damping device 100. The mass of this mass section 130 can be increased by various techniques as exemplified below.

FIG. 7 is a perspective view schematically showing another example of the configuration of the mass part in the vibration damping device 100 shown in FIG. As shown in FIG. 7, the mass portion 130A can include a third bent portion 132A bent toward the fixed portion 110 at the outer edge of the mass portion 130A. Thereby, the mass portion 130A can have an “increased” mass compared to the case where the third bent portion 132A is not included.

FIG. 8 is a perspective view schematically showing another example of the configuration of the mass part in the vibration damping device 100 shown in FIG. 2. As shown in FIG. 8, the mass portion 130B can include a fourth bent portion 132B that is bent at the inner edge of the mass portion 130B toward the outer edge of the mass portion 130B. Thereby, the mass portion 130B can have an “increased” mass compared to the case where the fourth bent portion 132B is not included.

Note that when focusing on the fourth bent portion 132B, for example, a method of forming a hole H by punching out a region corresponding to the hole H in a sheet of arbitrary material (FIGS. 2, 3, 4, and 5) is used. etc.), instead of punching out a part of the area corresponding to the hole H in a sheet of arbitrary material, bend it toward the outer edge of the mass part 130B and use it as the third bent part 132B. be able to.

Note that the method shown in FIG. 8 can be used instead of the method shown in FIG. 7 or in combination with the method shown in FIG.

FIG. 9 is a perspective view schematically showing another example of the configuration of the mass part in the vibration damping device 100 shown in FIG. 2. FIG. As shown in FIG. 9, the mass portion 130C can include at least one (six as an example in FIG. 9) third ribs 132C. Thereby, the mass portion 130C can have an “increased” mass compared to the case where the third rib 132C is not included. Such third rib 132C can be formed of a material selected from the group including iron, copper, stainless steel, aluminum, and/or duralumin, and can be formed by press molding, adhesion, welding, etc. It can be formed or fixed to the mass part 130C by the method described above.

4-3. Object to be damped to which the damping device is attached FIG. 10 is a perspective view schematically showing an inverter, which is the object to be damped, to which the damping device 100 shown in FIGS. 2 to 9 and the like is attached. FIG. 11 is a perspective view schematically showing a motor, which is an object to be damped, to which the damping device 100 shown in FIGS. 2 to 9 is attached.

As illustrated in FIGS. 10 and 11, the vibration damping device 100 according to the various embodiments described above can be fixed to the outer surface of the housing 502 of the inverter 500, which is the object to be damped, and It may be fixed to the outer surface of the housing 602 of a certain motor 600.

Alternatively, although not shown, the vibration damping device 100 can be fixed to the "inner surface" of the housing 502 of the inverter 500, or can be fixed to the "inner surface" of the housing 602 of the motor 600. It is possible. In this case, compared to a structure in which the vibration damping object is fixed to the "outer surface" of the housing 502 of the inverter 500 (or the housing 602 of the motor 600), the damping object can be controlled without increasing the size of the vibration damping object itself. It is possible to suppress vibrations and/or noise generated in the object to be vibrated.

In addition, in the various embodiments described above, the vibration damping device 100 has been described as not including the portion 10 of the vibration damping object to which the vibration damping device 100 is attached. However, it is also possible to interpret the damping device 100 as including the portion 10 of the damping object as a part of the damping device 100.

Further, as will be easily understood by those skilled in the art who have the benefit of this disclosure, the various examples described above can be used in appropriate combinations with each other in various patterns as long as no contradiction occurs.

5. Effects of Various Embodiments As explained above, according to various embodiments, the vibration damping device includes a fixed part attached to the object to be damped, an elastic part connected to the fixed part, and a and a mass part connected to the fixed part, and the mass part and the elastic part can vibrate in place of the object to be damped, using the fixed part as a support point. This makes it possible to at least partially suppress vibrations and/or noise occurring in the object to be damped.

Furthermore, by appropriately setting the mass of the mass part (and the elastic part) and/or the rigidity of the elastic part (and the mass part), it is possible to have a natural frequency approximately equal to the natural frequency of the damping object. A vibration damping device can be provided.

Furthermore, by forming at least two or more of the fixed part, the elastic part, and the mass part as an integral part that is continuously connected to each other, the vibration damping device can suppress loosening that occurs between the parts. In addition, it is possible to reduce costs and improve strength. Such an effect becomes remarkable by forming all of the fixed part, the elastic part, and the mass part as an integral part that is continuously connected to each other.

Furthermore, at least two or more of the fixed part, the elastic part, and the mass part can be provided so as to have a point-symmetrical shape with respect to the region of the fixed part that is attached to the object to be damped. . This makes it possible to at least partially suppress the occurrence of a moment in the above region. In particular, by forming each of the fixed part, the elastic part, and the mass part so as to have a point-symmetrical shape with respect to the region of the fixed part that is attached to the object to be damped, a moment is generated in the above-mentioned regions. It is possible to more effectively suppress the situation that occurs.

In addition, the vibration damping devices according to various embodiments can be fixed to the inner surface of the housing of the object to be damped. Thereby, it is possible to suppress an increase in the size of the vibration damping object itself.

6. Various Aspects The vibration damping device according to the first aspect includes a fixed part that includes a plate-shaped part and is attached to a damped object, and is connected to the fixed part and extends radially from the fixed part, and is made of an elastic material. and a mass part connected to the elastic part, extending so as to surround the elastic part, and having mass.

According to this configuration, in the vibration damping device, the mass part and the elastic part can vibrate in place of the vibration damping target, using the fixed part attached to the vibration damping target as a support point. This makes it possible to at least partially suppress vibrations and/or noise occurring in the object to be damped.

The vibration damping device according to the second aspect can adopt a configuration in which "the fixed part, the elastic part, and the mass part are formed as one continuously connected member" in the first aspect. .

According to this configuration, the vibration damping device can suppress phenomena such as loosening between parts, and can also reduce costs and improve strength.

The vibration damping device according to the third aspect is characterized in that in the first aspect, "each of the fixed part, the elastic part, and the mass part is based on a region where the fixed part is attached to the vibration damping object, It is possible to adopt a configuration that exhibits a point-symmetric shape.

According to this configuration, it is possible to more effectively suppress the generation of a moment in the region of the fixed part that is attached to the vibration damping object, and therefore it is possible to suppress the generation of a new vibration source.

The vibration damping device according to the fourth aspect is characterized in that in the first aspect, "the elastic part is a first rib extending along the extending direction of the elastic part, or a first rib extending along the extending direction of the elastic part". A configuration including a second rib extending along the direction can be adopted.

According to this configuration, the elastic part can increase the rigidity of the elastic part by including the first rib, or can decrease the rigidity of the elastic part by including the second rib.

The vibration damping device according to the fifth aspect is characterized in that in the first aspect, "the elastic section has a first end extending along the extending direction of the elastic section and a first end extending along the extending direction of the elastic section. and a second end portion extending on the opposite side from the first end portion, the elastic portion including a first bent portion bent toward the second end portion at the first end portion, and , a second bent portion bent toward the first end at the second end.

According to this configuration, the elastic portion includes the first bent portion and/or the second bent portion, thereby increasing the rigidity of the elastic portion.

The vibration damping device according to the sixth aspect is characterized in that in the first aspect, "the mass part includes a third bent part bent toward the fixed part at the outer edge of the mass part, and a fourth bent portion that is bent toward the outer edge of the mass portion at the inner edge.

According to this configuration, the mass part can increase the mass of the mass part by including the third bent part and/or the fourth bent part.

The motor according to a seventh aspect includes a housing, and the vibration damping device according to any one of the first to sixth aspects, in which the fixing part is fixed to the inner or outer surface of the housing. It is possible to adopt a configuration that

According to this configuration, the vibration and/or noise generated in the motor housing can be suppressed by vibrating the vibration damping device attached to the motor instead of the motor housing.

An inverter according to an eighth aspect includes a housing, and a vibration damping device according to any one of the first to sixth aspects, in which the fixing part is fixed to the inner or outer surface of the housing. It is possible to adopt a configuration that

According to this configuration, the inverter can suppress vibration and/or noise generated in the inverter housing by vibrating the vibration damping device attached to the inverter instead of the inverter housing.

10 Part of vibration damping object 12 Support point H Hole 100 Vibration damping device 110 Fixed part 112 Center part 120, 120A, 120B, 120C Elastic part 122, 122A, 122B, 122C Plate member 124A First rib 124B Second Rib 124C First bent part 126C Second bent part 130, 130A, 130B, 130C Mass part 132A Third bent part 132B Fourth bent part 132C Third rib 500 Inverter 502 Housing 600 Motor 602 Housing

Claims (8)

a fixed part that includes a plate-shaped part and is attached to a vibration damping object;
an elastic part connected to the fixed part, extending radially from the fixed part, and formed of an elastic material;
a mass part connected to the elastic part, extending so as to surround the elastic part, and having mass;
A vibration damping device equipped with. The damping device according to claim 1, wherein the fixed part, the elastic part, and the mass part are formed as one continuous member. The vibration damping device according to claim 1, wherein each of the fixed part, the elastic part, and the mass part has a point-symmetrical shape with respect to a region where the fixed part is attached to the vibration damping object. The control according to claim 1, wherein the elastic portion includes a first rib extending along an extending direction of the elastic portion or a second rib extending along a direction crossing the extending direction of the elastic portion. Shaking device. The elastic portion has a first end portion extending along the extending direction of the elastic portion, and a second end portion extending on the opposite side from the first end portion along the extending direction of the elastic portion. including;
The elastic portion includes a first bent portion bent toward the second end at the first end, and a second bent portion bent toward the first end at the second end. The vibration damping device according to claim 1, comprising at least one of the curved portions. The mass part has a third bent part bent toward the fixed part at an outer edge of the mass part, and a fourth bent part bent towards the outer edge of the mass part at an inner edge of the mass part. The vibration damping device according to claim 1, comprising at least one of the following. housing and
The vibration damping device according to any one of claims 1 to 6, wherein the fixing part is fixed to an inner surface or an outer surface of the housing,
A motor equipped with. housing and
The vibration damping device according to any one of claims 1 to 6, wherein the fixing part is fixed to an inner surface or an outer surface of the housing,
An inverter equipped with.

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