JPS60256639A - Supporting device for equipment base or the like - Google Patents

Abstract

PURPOSE:To damp vibration induced to a supporting device itself having an elastic mechanism instantaneously with a high efficiency, by adding a vibration damping mechanism utilizing a magnetic fluid to the supporting device. CONSTITUTION:An air spring member 2 formed of soft rubber materials or the like is connected to the upper end of a non-magnetic outer cylindrical foundation member 11. An outer base 6 is connected through a connecting member 5 to the center of the spring member 2. Thus, an elastic mechanism B is constructed. A vibration damping mechanism A is fixed to the elastic mechanism B. The vibration damping mechanism A is provided in the outer cylindrical foundation member 11. A ring-like cylindrical member 12 including a magnet 21 is fitted with the inner circumference of the outer cylindrical foundation member 11. A non- magnetic inner cylindrical member 13 is arranged in the ring-like cylindrical member 12 with a gap defined therebetween for incorporating a magnetic fluid 15 therein. The inner cylindrical member 13 is formed with a shaft portion 16 to be fixed to the center of the spring member 2. Thus, the vibration damping mechanism A is constructed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of Industry) The present invention provides a method for incorporating a magnet body and a magnetic fluid into an elastic mechanism body that has elasticity that is made as soft as possible by appropriate means. The present invention relates to a device incorporating a vibration damping mechanism characterized by being skillfully combined.

More specifically, the present invention uses an H-deployable mechanism to dampen vibrations generated in appropriate equipment, and moreover, the combination of a magnet and a magnetic fluid constituting the H-vibration damping mechanism. This is a device that uses the apparent increase in viscosity caused by the magnetic field of the magnetic fluid to attenuate free vibrations induced in the elastic mechanism, etc., and simultaneously damps vibrations. This invention relates to a device that is used in various fields that require attenuation.

(Prior Art) Conventionally, there are various types of devices for isolating and damping vibrations, including a 4-meter structure. However, in conventional devices that only have damping means such as orifices, the elastic mechanism inside the device is made as flexible as possible due to the need to further enhance the vibration isolation effect, so vibration damping is necessary. There is an extremely disadvantageous drawback in that vibrations, particularly free vibrations, are sustained indefinitely in the elastic mechanism itself, resulting in a reduction in the efficiency of vibration damping. In addition, in various conventional devices, it is common for the vibration generation source and the vibration damping mechanism in the device to be in harmonious contact with the debris, so the vibrations induced as appropriate due to this contact state. This is inconvenient in that the vibration is transmitted to the mechanism itself which is intended to dampen the vibration, and the mechanism itself becomes a vibration medium.

However, in the past, it has been a very important problem to solve the problem of how to improve the vibration damping ratio while eliminating the defects and inconveniences listed above.

(Objective of the present invention) The present invention has been developed in view of the conventional situation, and its purpose is to eliminate the defects and inconveniences of the conventional situation and to reduce the vibrations that occur. While providing highly efficient vibration isolation,
Moreover, J! 11 It is an object of the present invention to provide a device having a mechanical body that damps efficiently and efficiently and has an extremely good vibration damping ratio.

(Structure of the present invention) Hereinafter, one embodiment of the present invention will be described with reference to the attached drawings.

In other words, the basic configuration of the device of the present invention is to generate a strong magnetic field by arranging a plurality of magnets, and to further increase the apparent viscosity of the magnetic fluid, thereby inducing a large braking force. It quickly attenuates various free vibrations induced by the vibration, improves transient characteristics and phase characteristics extremely well, and furthermore, the device itself is a completely non-contact type damper! A vibration damping mechanism (A) characterized by:
), and an elastic mechanism (B) which incorporates the mechanism (A) mentioned above and has elasticity made as flexible as possible by some appropriate means such as an air spring system, etc. .

In order to further exhibit the vibration isolation function, the F-deployable mechanism (B) may have a structure as long as it has a springy part made as flexible as possible by appropriate means, and the springy part may be Specifically, for example, an air spring method can be considered. In the illustrated embodiment, an elastic mechanism body (B') has an air chamber 3 formed by a spring portion 2 made of a soft rubber material whose lower end is supported by a side frame l made of a suitable steel material.

In addition, the reference numeral 4 in the figure is a fastening part that fastens the side frame l and the spring part 2, and the reference numeral 5 is a fastening part that connects the spring part 2 to the upper frame 6 on which appropriate equipment, etc. not shown in the figure is placed. 2, which is located at the center of the spring section 2.

- The structure of the vibration damping mechanism (A) is that a ring-shaped cylinder part 12 is provided inside the base outer cylinder part 11 made of a non-magnetic material, and a ring-shaped cylinder part 12 is provided inside the base outer cylinder part 11. An inner cylinder part 13 made of a non-magnetic material is arranged in the ring-shaped cylinder part.
A magnetic fluid 15 is contained within the basic outer cylinder part 11 during delivery while a passage part 14 with an appropriate gap is formed between the outer peripheral surface of the ring-shaped cylinder part 12 and the inner peripheral surface of the ring-shaped cylinder part 12. A shaft portion 16 made of a non-magnetic material is installed unevenly on the L side of the inner cylinder portion 13, and the upper end of the shaft portion 16 is connected to the center of the inner surface of the spring portion 2 with a fixing portion 31. Reference numeral 18 in Fig. 0 is a tube for storing air candy in the air chamber 3, and reference numeral 19 is the upper end of the cylinder of the basic outer cylinder 11. The sloped portion is located at the lower end of the air chamber.

The structure of the link-shaped cylindrical portion 12 is such that a plurality of magnet bodies 21 are laminated with spacers 22 in between, and the magnet bodies 21 are arranged in series with the same polarity facing each other with each spacer 22 in between. are doing. However, in the present invention, the ring-shaped cylinder portion 1
It goes without saying that various combinations of the magnet bodies 21 forming the magnet body 2 are possible, and are not limited to the illustrated example.

Note that the vibration damping mechanism (^) described above can have the configuration shown in FIG. 2 as well as the configuration shown in FIG. That is, an inner cylinder s13' made of a magnet is placed inside a basic outer cylinder part 11' made of a non-magnetic material, and a passage 14° is formed between the outer peripheral surface of the inner cylinder part and the inner peripheral surface of the basic outer cylinder part. It is also possible to form a base outer cylindrical portion and incorporate a magnetic fluid 15° into the base outer cylinder. And, in this other configuration, the axis m1
6', flat plate part 17', tube part 18', inclined part 19', magnet body 21', spacer 22', etc., are the same as those shown in FIG.

Therefore, each mechanism (^), ([1) of this device configured as shown in H below, as an example of its application, when this device is used as a vibration-proof stand for an appropriate device, etc.) , mount 6
is placed in the water system H, and a lower pedestal or floor part 22 is placed on the lower surface of the basic outer cylinder part 11.

(Operation of the present invention) However, in the apparatus according to the present invention constructed as described above, the operation thereof will be explained based on the embodiment shown in FIG. 1 as follows.

First, regarding the vibration damping mechanism (A), its ring-shaped cylinder portion 1
It is possible to induce a magnetic field in the following state on the inner circumferential surface of No. 2, that is, on the passage portion 14.

That is, since the ring-shaped cylindrical portion 12 is connected with each magnet body 21 with the same polarity facing each other via each spacer 22, each magnetic field 23 is generated as shown by the m line in FIG. The maximum and intense magnetism *24 (black dots in the figure) occurs at the side portions of each spacer 22, and the magnetic field is minimum at the center of each magnet body 21. Therefore, the vibration damping Jj in the device of the present invention is
In one structure (A), the inner circumferential surface of the ring-shaped cylinder part 21 and the inner circumferential surface of the ring-shaped cylinder part 21 are A magnetic field 24 can be applied extremely effectively to the magnetic fluid 15 flowing through the passage 14 formed between the outer peripheral surface of the inner cylinder 13, and the apparent viscosity of the magnetic fluid 15 is reduced by the MI field 24. This means that it will be possible to increase it even further. The apparent viscosity of the magnetic fluid 15 can be easily adjusted by changing the viscosity concentration of the magnetic fluid 15 by concentrating or diluting the magnetic fluid 15 itself.

Incidentally, although the operation as shown in L is not particularly explained, it is exactly the same in the embodiment shown in FIG.

In this device, since the sloped portion 19.19'' is formed, even if the embodiment shown in FIG. 2 is adopted, even if the magnetic fluid 15' is located on the sloped portion. The magnetic fluid 15 is always stored in the passage portion 14' with the slope of the sloped portion, and in the embodiment shown in FIG.
1, the magnetic fluid always remains in the passage and will never migrate to the air chamber 3 under any circumstances. do not have.

On the other hand, the elastic mechanism (B) is located on the L side of the vibration damping mechanism (A) as described above, and its air chamber 3 and spring section 2 adjust air supply and exhaust through the tube section 18. It exhibits a vibration isolating function of isolating vibrations generated from appropriate equipment placed on the upper pedestal 6L as efficiently as possible.

(Effects of the Present Invention) The effects of the present apparatus will be explained below with reference to FIG. Incidentally, it goes without saying that the effects described below are exactly the same for the embodiment shown in FIG.

In other words, by installing one elastic mechanism (B), vibrations generated from the equipment on the upper frame 6 can be isolated as much as possible. The inner cylinder M of the vibration region 9 mechanism body (A) is fixed to the lower end of the flat plate part 17.
As the magnetic fluid 15 moves along the vibration of the Jilli device, etc., the magnetic fluid 15 flows through the passage section 14 while creating a velocity gradient. A pressure difference proportional to the average velocity of the flow is generated, which generates a braking force, further increases the braking force, and uses this braking force to create a deployable mechanism (B). ), etc., can be quickly damped. According to the present invention, by combining the magnetic fluid 15 and each magnet body 21 as in the above example, the braking force itself, which depends on the viscosity of the magnetic fluid 15 and the gap between the passage portions 14, Due to the above-mentioned intense magnetic field 24, the apparent viscosity of the magnetic fluid 15 increases, adding an even greater braking effect, thereby instantly and highly efficiently suppressing the vibrations induced in the I# mechanism (B), etc. It is designed so that it can be attenuated.

Note that the h-distribution power of this device can be easily adjusted by changing the concentration of the magnetic fluid 15 delivered and contained in the basic outer cylinder part 11 as mentioned above, and it also requires an even greater braking force. In case.

The braking force can be increased by increasing the number of laminated magnets 21 forming the ring-shaped cylinder 12 or by using the present device itself in parallel.

On the other hand, the present invention not only has a particularly excellent damping effect as described above, but also has a ring-shaped cylinder part 12 made of laminated magnets 21 in a magnetic fluid 15, and also Due to the strong magnetic field 24 generated on the inner circumferential side surface, the inner cylinder part 13 is centered on the waste without coming into contact with the inner circumferential surface of the ring-shaped cylinder part 12 at all. Therefore 1. In other words, the device can be called a non-contact type damping mechanism, and can completely eliminate the inconvenience that each mechanical part of the device itself becomes a vibration medium when contacted as in the conventional method. It is something.

Here, one embodiment illustrated as an example of the mechanism and application of this device is a case where it is used as a vibration-isolating stand for appropriate equipment, etc. Therefore, the V&decay ratio is determined in advance from the natural period of the stand, and the magnetic fluid 15 is When the device according to the present invention is used on such a pedestal by setting a suitable concentration of Alternatively, free vibrations induced in either the floor or the like can be quickly damped.

In addition, it goes without saying that this device can be used as a vibration damper in various fields of yuzu, without being limited to the above application example.

On the other hand, in this device, the elastic l11 structure (B) is configured to enclose and cover the vibration damping mechanism (A), so the inside of the vibration damping mechanism is completely sealed. By completely blocking dust and debris from entering the interior from the outside and preventing evaporation of the magnetic fluid, there is no inadvertent adverse effect on each mechanism of the device itself, especially the magnetic fluid. It can be resolved successfully.

As explained hereinabove, the present invention is capable of successfully solving the above-mentioned important problems of the prior art and eliminating the conventional defects, inconveniences, and also that the mechanical part for vibration damping is completely non-contact. Because of this, there is no wear on the various parts of the mechanism, resulting in an extremely long service life.Also, in the present invention, no special means for centering the inner cylinder is required, so bearings, etc. are completely unnecessary. This is an extremely excellent device that can be applied to floor boxes in various fields where it is necessary to isolate and damp various random induced vibrations while having particularly excellent effects.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional side view showing one embodiment of the present invention along with an example of its application, Fig. 2 is a longitudinal sectional side view showing another embodiment of the invention, and Fig. 3 is a longitudinal sectional view of the main parts in Fig. 1. FIG. A... Vibration damping mechanism body, B... Elastic mechanism l...
Side frame, 2. Fist/henne part, 3... φ air chamber, 4 @... Fastening part, 5... Connector, 611... To mount, 7. Skewer mount or floor part, 11 .11゛...Foundation outer cylinder part, 12.
・ψ/G-shaped cylinder part, 13.13°・Inner cylinder part, 14.
14'φ...Passage part, 15.15°・Fist・Magnetic fluid,
16°16°...shaft part, 17.17°...good deeds board part,
18.18°...φ tube part, 19.19°III-inclined part, 21.21'...Magnet body, 22.22"--Sound spacer, 23., Magnetic field, 24.. Magnetic field, Fixed part 31゜No. 1 Figure 2 Figure 3 Procedural amendment 6゜ (Voluntary) August 1980, 7゜ 1988 Patent Application No. 111985 2. Title of invention Support for equipment mounts, etc. Device 3, person making the amendment Relationship to the 9゜ case Patent applicant residence 5-10-18 Higashigotanda, Parts Ward, Tokyo (Iwata Building) Name Yakumo Kogyo Co., Ltd. Representative Hiroyuki Takagi 4, agent address Port of Tokyo "Drawing" attached to the specification subject to amendment, 9-1-7, Akasaka, Ward. Contents of the amendment: "In Figure 3, the number 23 located below the number 22 is corrected to 21," and the IF formula each We will submit the drawings. List of attached documents (1) Old-style drawings (Figures 1 to 3, each) 1 copy (2) i
Copy of Figure 3 (corrected numbers are indicated in red ink in the figure)
1 letter...(“

Claims (1)

[Claims] By arranging a plurality of magnets, a strong magnetic field is generated and the apparent viscosity of the magnetic fluid is further increased to induce a large braking force, and various types of braking force induced by the large braking force are generated. A vibration damping mechanism (A) characterized by rapidly damping the free vibrations of the air and improving the transient characteristics and phase characteristics very well. An elastic mechanism (B) that has spring properties that are made as soft as possible by some appropriate means, including a spring method. The unique Q, r deployable mechanism (B) efficiently isolates the vibrations of equipment, etc., and at the same time, by skillfully combining the magnet body and magnetic fluid, the device itself can be made completely contactless. A device mount, etc., characterized in that the free vibration generated in the elastic mechanism (B), etc. can be instantly and highly efficiently damped by the vibration damping mechanism (A) described in E, which serves as a damping mechanism of the method. support device.