JPH094679A - Inertial mass element and vibration control device therewith - Google Patents

Abstract

PURPOSE: To manufacture an inertial mass element easily and at a low cost by bending, winding or compressing a metallic flat plate so as to deform it into a massive one. CONSTITUTION: By bending the end of a flat plate manufactured by cutting or punching metallic flat plate base material such as steel so as to be a rectangular one or the like, into a wavy plate shape alternately by a corrugating roll or into a wavy shape by a metal mold in one working process, an intermediate body of an inertial mass element can be obtained. When its mounting piece part 6 is clamped by the metal mold and the top end is pressed in the lengthwise direction of the intermediate body by a piston of a press, bent surfaces are brought into contact alternately by compression to form a deformed massive mass element 5. In an engine mount 10, elastic elements 2A, 2B such as rubber are cure-bonded to both sides of the front and back of the mounting piece part 6 of the inertial mass element 1 and are then cure-bonded integrally to mounting plates 3A, 3B. The inertial mass element 1 is integrally-formed beforehand by the mass element 5 and the mounting piece part 6, so vibration is absorbed by the internal friction of the elastic elements 2A, 2B provided between both the mounting plates 3A, 3B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inertial mass body suitable for use in a dynamic damper for suppressing transmission of vibration generated from an engine or the like.

[0002]

2. Description of the Related Art Conventionally, a dynamic damper has been known as a device for suppressing vibration with respect to vibration of a specific frequency. This dynamic damper supports an inertial mass body having a predetermined mass by an elastic body such as rubber having a predetermined spring constant, and applies a vibration input matching the natural frequency determined by the mass and the spring constant to the inertial mass. It is suppressed by resonance. Then, for example, it is attached to a vibration generating source such as an automobile engine or a vehicle body structural member connected to the vibration generating source to prevent vibration noise and deterioration of riding comfort. FIG. 8 shows a conventional engine mount device that elastically supports an automobile engine, and this device also functions as the dynamic damper described above.

To explain the structure of this apparatus, the engine mount 110 has elastic bodies 102A and 102B made of rubber or the like vulcanized and bonded to both front and rear surfaces of the intermediate plate 107, and these elastic bodies 102A and 102B are further attached. The plates 103A and 103B are also integrally vulcanized and bonded. Mounting screws 104A, are attached to the mounting plates 103A and 103B.
104B is provided, and the mounting screws 104A and 104B and the nuts are used to mount the mounting plates 103A and 103B to the vibration generating portion or the vibration receiving portion, respectively. Further, a mass body 105 is previously fixed to a part of a peripheral edge of the intermediate plate 107 by a welding portion 106 by welding, and the inertial mass body 101 is formed by the intermediate plate 107 and the mass body 105. Therefore, in this device, when the mounted engine operates to generate vibration, the vibration is absorbed by the internal friction of the two elastic bodies 102A, 102B disposed between the mounting plates 103A, 103B. , The elastic bodies 102A and 102B, and the intermediate plate 107 and the mass body 105 arranged therebetween.
The harmful vibration of the engine is suppressed and reduced by the dynamic damper constituted by the inertial mass body 101 composed of.

[0004]

In the structure shown in FIG. 8, the inertial mass body 1 constituting the dynamic damper is constructed.
In order to obtain No. 01, a metal lump-shaped mass material is manufactured in advance by cutting a metal round bar or square bar made of iron, steel, stainless steel, etc. to a desired weight, and finishing of this mass material Processing is performed to form the mass body 105. Then, the mass body 105 is fixed to the peripheral portion of the intermediate plate 107 by welding or the like to form the inertial mass body 101. However, iron,
A round bar or square bar made of metal such as steel or stainless steel is more expensive than a flat metal plate, and the unit price is further increased when the necessary amount of the mass body 105 is less than the production lot. Furthermore, after cutting and fusing, a chamfering process such as deburring of the material for the mass body is required as a post process, which makes the work complicated.

It is also possible to stack a plurality of small pieces of metal plates punched from a flat metal sheet by press working to form a metal block. In this case as well, after the small pieces of a plurality of metal plates are stacked, the side surface thereof is formed. Although a material for a mass-like mass body composed of a laminated body of metal plates is obtained by welding or caulking, the work becomes complicated and the above-mentioned post-process is also required. As another method for obtaining a material for a particularly large mass, cast iron can be obtained by casting it to a desired weight and cutting it, but a special mold is required and deburring of cast products and Since cutting is also required, the cost will increase.

On the other hand, when the mass body 105 is actually used, as shown in FIG. 8, the intermediate plate 107 is manufactured in a separate process in advance, and the mass body function is performed through the intermediate plate 107. In order to work, the mass body 105 is used by mounting it on the intermediate plate 107. Since the mass body 105 is in the form of a metal block as described above, this mounting method is performed by arc welding in order to improve the mounting strength. A step of fixing the intermediate plate 107 and the mass body 105 is required. When the intermediate plate 107 and the mass body 105 are welded, the mass body manufactured by the above method has a flat surface, so that the welding surface of the intermediate plate 107 is a curved surface. It becomes necessary to perform overlay welding on the mass body 10, and depending on the welding site, the mass body 10 may be formed.
The degree of freedom of the mounting position of the mass body 105 is limited such that the mounting of No. 5 cannot be performed.

Therefore, according to the present invention, when forming the inertial mass body, it is not necessary to use an expensive round bar made of metal such as steel or a metal block obtained by cutting a square bar as the inertial mass body, and the manufacturing is easy and inexpensive. (EN) An inertial mass body that can be manufactured and a vibration damping device using the same, and on the other hand, it is not necessary to purposely fix the peripheral mass of an intermediate plate by welding or the like, and to manufacture easily and inexpensively. It is an object to provide an inertial mass body that can be manufactured and a vibration damping device using the same.

[0008]

The present invention has the following constitution in order to achieve such an object. That is, the invention according to claim 1 is an inertial mass body that is connected to an elastic body having a predetermined spring constant provided in a vibration source or a vibration transmission path and suppresses vibration in a natural frequency range. The inertial mass body is characterized by having a massive mass body part formed by bending, winding and / or compressing a metal flat plate.
According to a second aspect of the present invention, the inertial mass body is a block-shaped mass body part formed by bending, winding and / or compressing a metal flat plate, and the inertial mass body is attached to a predetermined mounting portion. It is characterized in that it is integrally formed with the flat plate-shaped mounting piece. The invention according to claim 3 is
A vibration isolator comprising an elastic body provided in a vibration source or a vibration transmission path and having a predetermined spring constant, and an inertial mass body attached to the elastic body, wherein the inertial mass body is a metal. An anti-vibration device having a mass-shaped mass portion formed by bending, winding and / or compressing a flat plate. According to a fourth aspect of the invention, the inertial mass body is a lumpy mass body part formed by bending, winding and / or compressing a metal flat plate, and the inertial mass body is attached to the vibration isolator. A vibration-damping device characterized by being integrally formed with a flat plate-shaped mounting piece for mounting on the.

[0009]

According to the first aspect of the present invention, in providing the inertial mass body, the inertial mass body is formed by continuously bending and folding a one-piece metal flat plate by press working or winding the metal plate into a coil. Since it is deformed into a lump shape, it is possible to provide an inexpensive inertia mass body with a simple structure from a one-piece metal flat plate that is easy to obtain and does not have much thickness limitation without using an expensive round bar or square bar. In addition, the manufacturing is easier and less expensive than a product obtained by stacking and welding a plurality of metal plates and a cast product. Further, according to the invention of claim 2, further, since a part of the inertial mass body integrally has a mounting piece portion, it is not necessary to separately prepare a mounting plate, and this mounting piece is provided when the mass body is provided. By using the parts, mounting of the mass body becomes extremely easy. According to a third aspect of the present invention, when the inertial mass body is used in a vibration damping device having a dynamic damper function, which includes an elastic body and an inertial mass body attached to the elastic body, the mass body portion is formed by deforming a metal plate. The vibration damping device can be manufactured at a low cost. According to a fourth aspect of the invention, when the inertial mass body is used in a vibration damping device such as an engine mount including an elastic body and an inertial mass body attached to the elastic body, the inertial mass body is formed integrally with the mass body portion. By using the mounting piece, mounting can be easily performed without welding, and an inexpensive vibration damping device with a dynamic damper can be manufactured.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an inertial mass body and a vibration isolator using the same according to a first embodiment of the present invention. That is, to explain the configuration of this device, in the engine mount 10, elastic bodies 2A and 2B such as rubber are vulcanized and adhered to both front and rear surfaces of the mounting piece portion 6 of the inertial mass body 1, and the elastic bodies 2A and 2B are further bonded. They are integrally vulcanized and bonded to the mounting plates 3A and 3B. Screws 4A and 4B are provided on the attachment plates 3A and 3B, and the attachment plates 3A and 3B are attached to either one or the other of the vibration generating portion or the vibration receiving portion by the screws 4A and 4B and a nut (not shown). Further, as will be described later, the inertial mass body 1 for suppressing the vibration input by the resonance of the inertial mass is integrally formed in advance by the mass body portion 5 and the mounting piece portion 6. Therefore, in this engine mount, when the mounted engine operates and vibration occurs, the two mounting plates 3A, 3
Vibration is absorbed by the internal friction of the two elastic bodies 2A, 2B arranged between the two B's, and both elastic bodies 2A, 2B are absorbed.
The harmful vibration of the engine is suppressed and reduced by the dynamic damper configured by the inertial mass body 1 including the mass body part 5 and the mounting piece part 6 arranged between them. The mounting piece 6 is a spring in the axial direction (the vertical direction in FIG. 1) of the elastic body interposed between the mounting plates 3A and 3B, like the intermediate plate 107 in the vibration isolator of FIG. 8 (prior art). It can also be used as a hard plate that adjusts the constant to be harder.

The method of manufacturing the inertial mass body 1 used in this embodiment will be described in more detail. 2 (a) and 2 (b) are iron,
A metal flat plate base material such as steel or stainless steel can be formed into a desired shape,
For example, a metal flat plate 1A obtained by cutting or punching into a shape such as a square or a rectangle, and the flat plate end portion 5A is alternately bent into a corrugated plate shape by a corrugated roll, or a corrugated plate is once formed by a mold or the like. When it is bent into a shape, an intermediate body 1B of the inertial mass body 1 as shown in FIG. 2C is obtained. Next, FIG.
As shown in (d), this intermediate body 1B is placed in the mold 36 to sandwich the mounting piece 6 between the molds, and the tip 34 of the intermediate body 1B is fixed to the length of the intermediate body 1B by the piston 34 of the press. When pressed in the direction, the compression causes the bent surfaces to alternately come into contact with each other to form a deformed mass body portion 5. By dividing the mold 36 in this manner, the inertial mass body 1 having the mass body portion 5 and the mounting piece portion 6 is obtained as shown in FIGS. In this way, it is possible to integrally manufacture the inertial mass body 1 made of a one-piece metal flat plate.

In the present embodiment, the inertial mass body 1 is formed by integrally molding the mass body portion 5 and the mounting piece portion 6 from a one-piece metal flat plate, but the spring constant is used for the vibration isolator. It is also possible to use an existing hard plate provided for adjustment and to manufacture and weld only the mass body portion 5 made of a one-piece metal flat plate to this hard plate. Further, in the production of the inertial mass body 1, a metal flat plate may be directly crushed by a press without being bent into a corrugated plate shape to form a lump.

As described above, in this engine mount, vibration is absorbed by the internal friction of the two elastic bodies 2A, 2B disposed between the two mounting plates 3A, 3B, and at the same time, the elastic bodies 2A, 2B and these elastic bodies 2A, 2B are absorbed. The harmful vibration of the engine can be suppressed and reduced by the dynamic damper configured with the inertial mass body 1 disposed between the two.

FIG. 3 is a sectional view showing a second embodiment of the inertial mass body and the vibration isolator according to the present invention. Explaining the configuration of this device, the engine mount 10 includes a lid member 12 as a mounting plate having a mounting screw 12A and a mounting screw 1.
An elastic body 16 such as rubber is interposed between the elastic body 16 and the mounting plate 14 having 4A, and a liquid chamber 18 in which a liquid is sealed is provided inside the elastic body 16 and a liquid chamber 1 is formed by a partition wall portion 26 described later.
8 is divided into a pair of main liquid chamber 18A and sub liquid chamber 18B, and these main liquid chamber 18A and sub liquid chamber 18B are structured to communicate with each other through an orifice 30 provided in the partition wall portion 26. . The partition wall 26 is a rubber membrane 20.
And a first partition member 22 having the membrane 20 in the central hole portion, and a second partition member 24 that abuts the first partition member 22. First partition member 22
Is formed into an annular shape having a cylindrical portion, and the membrane 2
When 0 is fixed, it becomes a hat shape. The second partition member 24 is formed in a hat shape having a cylindrical portion having a smaller diameter than the cylindrical portion of the first partition member 22, and the first partition member 22 and the second partition member having these membranes 20 are formed. The orifice 30 is formed by incorporating the concave portions 24 and 24. First partition member 2
The second partition member 24 and the second partition member 24 are sandwiched between the lid member 12 and the caulking metal fitting 32 together with the outer peripheral portion of the diaphragm 28. Further, in the middle of the elastic body 16 in the vertical direction, the elastic body 16 and the mounting piece 6 of the inertial mass body 1 including the ring-shaped annular mounting piece 6 and the mass body 5 are added. Sulfurized and bonded. The mounting piece 6 has a large central hole for disposing the liquid chamber 18.

When the engine mounted on the lid member 12 operates, the vibration of the engine causes the elastic body 16 to pass through the lid member 12.
The vibration is absorbed by the internal friction of the elastic body 16. Further, as the liquid in the main liquid chamber 18A changes in pressure in accordance with the deformation of the elastic body 16, the liquid passes through the orifice 30 and is expanded and contracted by the main liquid chamber 18A and the diaphragm 28. Vibration is suppressed by the damping action based on the viscous resistance of the liquid flow generated in the orifice 30 and the liquid column resonance, and the vibration is suppressed, and further, the mass body portion 5 arranged on the elastic body 16 and the mounting piece. The dynamic damper configured with the section 6 suppresses harmful vibration of the engine and improves the vibration damping effect.

FIGS. 4A, 4B, and 4C are views for explaining the manufacture of the inertial mass body 1 of this embodiment shown in FIG. 3, and this point will be further described. That is, as shown in FIGS. 3A and 3B, a one-piece metal flat plate 1A having a hole 6B is manufactured by cutting or punching a metal flat plate base material such as iron, steel, and stainless steel, and then metal When the flat plate end 5A, which is the end of the flat plate, is wound and wound up into a coil, the flat plate end 5A becomes a massive mass part 5 as shown in FIG. 3C, and the flat plate annular part 6A is attached to the mounting piece 6 Inertial mass 1 is obtained.

FIG. 5 is a sectional view showing the third embodiment of the inertial mass body according to the present invention. FIG. 5 shows a dynamic damper constructed by the inertial mass body 1 according to the present invention. The dynamic damper 40 is formed by vulcanizing and adhering the inertial mass body 1 including the mass body portion 5 to the mounting plate 41 via the elastic body 42 such as rubber. Is fastened to the member. Although the elastic body 42 covers the entire circumference of the mass body portion 5 in FIG.
It may be only the surface of the bent portion 5B. Mass part 5
As for the manufacturing method of, like the inertial mass body 1 in the first embodiment, a metal flat plate is bent into a corrugated plate and then pressed into a block. At this time, the thing of the first embodiment is
The difference is that the mounting plate 6 is not provided and the entire metal flat plate is made into a lump.

FIG. 6 is a perspective view showing a fourth embodiment of the inertial mass body 1 according to the present invention. The mass body portion 5 is the mass body portion 5 when the mass body portion 5 shown in the first embodiment of FIG. 1 and the second embodiment of FIG. 3 is manufactured in advance and is attached to another attachment plate by welding. . The mass body portion 5 is a mass body portion 5 formed of a one-piece metal flat plate by the same manufacturing method as that described in the third embodiment, but the length of the folding margin of the metal flat plate is gradually increased. The mass body is a lump, and such a shape can prevent interference with other components (not shown) adjacent to the vicinity of the mass body portion 5.

FIG. 7 is a perspective view showing a fifth embodiment of the inertial mass body according to the present invention. In the inertial mass body 1 shown in FIG. 7, the mounting piece 6 is integrally formed with the mass body 5, and the mounting piece 6
The mounting hole 6B is drilled in and is attached to, for example, a body component member to which an elastic body is connected by bolting or the like. In this case, the vehicle body component itself functions as the inertial mass of the dynamic damper, but the inertial mass body 1 is used for mass adjustment at that time. For example,
By using the suspension spring in the vehicle suspension device as a spring element and the shock absorber as a damping element, the inertial mass body 1 is attached to a body component member connected to an elastic body composed of the suspension spring and the shock absorber to adjust the mass. A dynamic damper having an inertial mass of Then, it is possible to prevent harmful vibrations from being generated in the vehicle constituent members due to vibrations from the road surface when the vehicle is traveling.

[0020]

As described above, when forming an inertial mass body for suppressing vibrations in the natural frequency range, an expensive mass rod made of metal such as steel or a metal block obtained by cutting a square bar is used as an inertial mass. It is possible to provide an inertial mass body that does not need to be used as a body and can be manufactured easily and inexpensively, and a vibration damping device using the same, and, on the other hand, purposely fix the peripheral mass of the intermediate plate by welding or the like. It is possible to provide an inertial mass body that can be manufactured easily and at low cost, and a vibration isolation device using the same, without the need to do so.

[Brief description of drawings]

FIG. 1 is a sectional view of an inertial mass body and a vibration isolator according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a manufacturing process of the first embodiment of the inertial mass body according to the present invention.

FIG. 3 is a sectional view of an inertial mass body and a vibration isolator according to a second embodiment of the present invention.

FIG. 4 is a diagram showing a manufacturing process of a second embodiment of the inertial mass body according to the present invention.

FIG. 5 is a sectional view of an inertial mass body and a vibration isolator according to a third embodiment of the present invention.

FIG. 6 is a perspective view of a fourth embodiment of the inertial mass body according to the present invention.

FIG. 7 is a perspective view of an inertial mass body according to a fifth embodiment of the present invention.

FIG. 8 is a cross-sectional view of a conventional inertial mass body and a vibration isolator.

[Explanation of symbols]

1, 101 Inertial mass body 1A Metal flat plate 1B Intermediate body 1C Tip part 2A, 2B, 16, 42, 102A, 102B Elastic body 3A, 3B, 14, 41, 103A, 103B Mounting plate 4A, 4B, 12A, 14A, 104A , 104B Mounting screw 5, 105 Mass body portion 5A Flat plate end portion 5B Bending surface 6 Mounting piece portion 6A Flat plate annular portion 6B hole 10, 50, 110 Engine mount 40 Dynamic damper 12 Lid member 18 Liquid chamber 18A Main liquid chamber 18B Sub liquid Chamber 20 Membrane 22 First Partition Member 24 Second Partition Member 26 Partition Part 28 Diaphragm 30 Orifice 32 Crimping Fitting 34 Piston 36 Mold 43 Mounting Hole 106 Welding Part 107 Intermediate Plate

Claims (4)

[Claims] 1. An inertial mass body connected to an elastic body having a predetermined spring constant, which is provided in a vibration source or a vibration transmission path, for suppressing vibration in a natural frequency range, the inertial mass. An inertial mass body, characterized in that the body has a massive mass part formed by bending, winding and / or compressing a metal flat plate. 2. The inertial mass body is a lumpy mass body part formed by bending, winding and / or compressing a metal flat plate, and a flat plate-like mass for mounting the inertial mass body at a predetermined mounting site. The device is integrally formed with the mounting piece.
The inertial mass body according to 1. 3. A vibration isolator comprising an elastic body having a predetermined spring constant provided in a vibration source or a vibration transmission path, and an inertial mass body attached to the elastic body, wherein the inertia An anti-vibration device, wherein the mass body has a massive mass body part formed by bending, winding and / or compressing a metal flat plate. 4. An inertial mass body is a lumpy mass body part formed by bending, winding and / or compressing a metal flat plate, and an inertial mass body for attaching the inertia mass body to a mounting portion of the vibration isolator. The vibration damping device according to claim 3, wherein the vibration damping device is integrally formed with the flat plate-shaped mounting piece.