JPH11165129A - Rotary oscillation mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a rotary oscillation mechanism which can be used as an oscillating machine which is compact, noise-reduced, inexpensive, and reliable by oscillating a roof around a prescribed axis by reciprocating the first permanent magnet and the opposite second permanent magnet by a driving source. SOLUTION: With a load to investigate oscillation properties mounted on a roof 4, when a driving source 16 is actuated, its driving axis 16a is reciprocated at a certain frequency in the arrow direction, and the first permanent magnet 6 is also reciprocated in the same direction through a link mechanism 14. Since the second permanent magnet 8, the same magnetic pole with the first permanent magnet 6 is facing, with the reciprocation of the first permanent magnet 6, the facing area of the magnets 6, 8 is changed, and repulsive force is changed periodically. As a result, since the second permanent magnet 8 is reciprocated in the perpendicular direction of the arrow X along a linear guide 30, a roof 4 is oscillated periodically around pivot axes 42, 42 in the arrow Y direction through the first and second links 32, 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary swinging mechanism for generating vibration energy around an axis by using a repulsive force of a pair of opposed permanent magnets.

[0002]

2. Description of the Related Art Conventionally, a vibrator that artificially generates vibration has been used to examine the vibration characteristics of a certain structure around an axis. Further, as a vibrator, an electrodynamic type and an unbalanced mass or cam type are generally known.

[0003]

However, in a vibrator using a link mechanism such as a crank, a relatively large drive motor is required because a load is directly applied to the drive motor. There was a problem that it could not handle low frequencies.

Further, since the apparatus itself is large-scale, not only is it necessary to secure an installation place and work, but also because of the large amount of heat generated, forced air cooling is required, and it is not possible to evaluate abnormal noise due to exhaust noise of fans and the like. There was a problem.

Further, since all of the above-mentioned vibrators have complicated structures, are heavy, and are expensive, light and inexpensive ones have been desired.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. By incorporating a plurality of permanent magnets, the present invention is compact, has low noise, and
It is an object of the present invention to provide a rotation swinging mechanism that can be used as an inexpensive and highly reliable shaker.

[0007]

Means for Solving the Problems In order to achieve the above object, of the present invention, the invention according to claim 1 comprises a base plate,
A top plate that is separated from the base plate by a predetermined distance and is swingably mounted around a predetermined axis, a drive source fixed to the base plate, and connected to the drive source and slidably on the base plate. A first permanent magnet attached, and a second permanent magnet having the same magnetic pole facing the first permanent magnet and slidably attached to the base plate, wherein the driving source reciprocates the first permanent magnet. A rotation rocking mechanism, wherein the top plate is rocked around the predetermined axis by moving the second permanent magnet back and forth.

[0008] The invention described in claim 2 is the first invention.
The reciprocating movement of the permanent magnet changes the facing area of the first and second permanent magnets to reciprocate the second permanent magnet.

Further, the invention according to claim 3 is characterized in that the second permanent magnet is reciprocated perpendicular to the moving direction of the first permanent magnet.

According to a fourth aspect of the present invention, the drive source and the first permanent magnet are connected via a link mechanism, and a load adjusting means is connected to the first permanent magnet to be applied to the top plate. The neutral position of the driving source is determined according to the load.

The invention according to claim 5 is characterized in that elastic means are attached to both sides of the swing center of the top plate, and the top plate is balanced by the elastic force of the elastic means. .

Further, according to a sixth aspect of the present invention, there is provided a base plate, a top plate which is separated from the base plate by a predetermined distance and is swingably mounted around a predetermined axis, and a driving source fixed to the base plate. A first permanent magnet connected to the driving source and slidably attached to the base plate; and a second permanent magnet fixed to the top plate with the same magnetic pole facing the first permanent magnet as opposed to the first permanent magnet. Wherein the driving source reciprocates the first permanent magnet to change an area facing the second permanent magnet, thereby swinging the top plate around the predetermined axis. This is a rotating and swinging mechanism.

According to a seventh aspect of the present invention, the drive source and the first permanent magnet are connected via a link mechanism, and a load adjusting means is connected to the first permanent magnet to be applied to the top plate. The neutral position of the driving source is determined according to the load.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the first embodiment of the present invention.
4 shows a rotation swing mechanism M1 according to the embodiment. FIG.
Is provided with a base plate 2 and a top plate 4 which is separated from the base plate 2 by a predetermined distance and is swingably mounted around an axis. A first permanent magnet 6 slidable in the direction of the arrow and a second permanent magnet 8 slidable in the vertical direction of the arrow X with the same magnetic pole facing the first permanent magnet 6 are attached.

The first permanent magnet 6 includes a linear bearing 10
Is slidably attached to a linear guide 12 fixed to the base plate 2 through the
A drive source 16 such as an M (voice coil motor) is connected via a link mechanism 14.

The link mechanism 14 includes a first lever 18 and a second lever 18.
The first lever 18 includes a lever 20 and a third lever 22.
Is pivotally connected to the first permanent magnet 6 while the other end is pivotally connected to one end of the second lever 20.
The other end of 0 is pivotally attached to the base plate 2. The intermediate portion of the first lever 18 is pivotally connected to one end of the third lever 22, and the other end of the third lever 22 is connected to the drive shaft 16 of the drive source 16.
a.

A load adjusting means 24 is connected in the vicinity of a connection portion of the first permanent magnet 6 with the first lever 18, and the load adjusting means 24 has a built-in elastic means 26 such as a spring. .

On the other hand, similarly to the first permanent magnet 6, the second permanent magnet 8 is slidably mounted on a linear guide 30 fixed to the base plate 2 via a linear bearing 28. One end of a first link 32 is fixed to the surface of the second permanent magnet 8 opposite to the surface facing the first permanent magnet 6, and the other end of the first link 32 is pivotally connected to one end of a second link 34. The other end of the second link 34 is pivotally attached to a bracket 36 fixed to one side of the top plate 4.

Fixed on the lower surface of the top plate 4 are two U-shaped brackets 38, 38 separated by a predetermined distance along the center line in the vertical direction of the arrow X.
Are two support members 40, 40 fixed to the base plate 2.
, Respectively, and the pivot shafts 42, 42 of the brackets 38, 38 and the support members 40, 40 extend in the vertical direction of the arrow X.

A coil spring 44 as an elastic means is disposed on one side of a line connecting the two pivots 42, 42, and another coil spring 46 is disposed on the other side. Both ends of the coil springs 44 and 46 are connected to the base plate 2 and the top plate 4, respectively, and elastically support the top plate 4.

The rotation swing mechanism M according to the present invention having the above-described structure.
The operation of No. 1 will be described below. When the drive source 16 is operated while a load (not shown) for examining the swing characteristic is mounted on the top plate 4, the drive shaft 16a reciprocates (vibrates) in the direction of arrow X at a certain frequency. The first permanent magnet 6 also reciprocates in the same direction via the link mechanism 14. Since the second permanent magnet 8 has the same magnetic pole as the first permanent magnet 6,
As the first permanent magnet 6 reciprocates, the opposing areas of the first and second permanent magnets 6, 8 change, and the repulsive force periodically fluctuates. As a result, since the second permanent magnet 8 reciprocates in the vertical direction of the arrow X along the linear guide 30, the top plate 4 is connected to the pivot shafts 42, 4 via the first and second links 32, 34.
2 periodically swings in the direction of arrow Y.

Here, the top plate 4 and the load are basically supported by the support members 40, 40.
The load difference between both sides of the coil springs 2, 42 is absorbed to some extent by the coil springs 44, 46 as balance springs. Further, the reaction force in the sliding direction (X direction) that the first permanent magnet 6 receives from the second permanent magnet 8 is canceled by the elastic force of the load adjusting means 24.

More specifically, the stroke amount of the first permanent magnet 6 is set by a load curve, an amplitude, and a load mass. The center of the stroke amount is the reference position, which is the neutral position of the drive source 16. Load adjusting means 24 for setting to neutral position
The valley of the load is set in the following manner. The valley of the load is a state in which the load in the sliding direction applied to the first permanent magnet 6 via the second permanent magnet 8 is canceled by the load adjusting means 24 and is in a balanced state. Refers to position.

FIG. 2 shows a rotation swing mechanism M2 according to a second embodiment of the present invention. The configuration of the rotation oscillating mechanism M2 shown in FIG. 2 is substantially the same as the configuration of the rotation oscillating mechanism M1 of FIG. 1, and the positions of the U-shaped brackets 38, 38 and the support members 40, 40 are 90 °. Change the pivot axis 42,
42 is different in that it extends in the direction of arrow X.

Therefore, while the rotation swinging mechanism M1 shown in FIG. 1 swings the load placed on the top plate 4 in the Y direction,
2 rotates the load in a Z direction perpendicular to the Y direction.

FIG. 3 shows a rotation swing mechanism M3 according to a third embodiment of the present invention. The rotation oscillating mechanism M3 shown in FIG. 3 is similar to the rotation oscillating mechanism M2 of FIG. 2, but in the rotation oscillating mechanism M2 of FIG. To
The end of the second link 34a is pivotally connected to the lower end thereof.

According to this configuration, the second permanent magnet 8 reciprocates in the vertical direction of the arrow X with the reciprocation of the first permanent magnet 6 in the X direction by the operation of the drive source 16. As a result, the U-shaped bracket 38a periodically swings in the Z direction about the pivots 42, 42 via the first and second links 32, 34a. Since the U-shaped bracket 38a and the top plate 4 are integrally connected, the top plate 4 also swings periodically in the same direction as the U-shaped bracket 38a.

FIG. 4 shows a rotary swing mechanism M4 according to a fourth embodiment of the present invention. In the rotation swinging mechanism M4 shown in FIG. 4, the lower ends of the plate-shaped support members 40a, 40a are fixed to both ends of the base plate 2, and the upper ends thereof are plate-shaped brackets 48, the lower ends of which are fixed to the top plate 4. 4
8 is pivotally attached to the upper end.

The base plate 2 is provided with a drive source 16, a first permanent magnet 6 which reciprocates via a link mechanism 14 by a driving force of the drive source 16, and a load adjusting means 24. Are substantially the same as those provided in the rotation rocking mechanisms M1 to M3 of FIGS. 1 to 3, and therefore description thereof is omitted.

The second permanent magnet whose same magnetic pole faces the first permanent magnet 6
The permanent magnet 8 is fixed to the lower surface of the top plate 4. The other end of the elastic means 50 such as a coil spring having one end fixed to the second permanent magnet 8 is fixed to a bracket 52 fixed to the base plate 2. Therefore, the second permanent magnet 8 is constantly biased toward the first permanent magnet 6 by the elastic force of the elastic means 50. The fixed position of the second permanent magnet 8 is determined by the plate-shaped support members 40a, 40a and the plate-shaped bracket 4
8, 48 are set directly below the axis of the pivot shafts 54, 54.

According to the above configuration, when the drive source 16 is operated with the load (not shown) for examining the swing characteristic placed on the top plate 4, the drive shaft 16a is driven by the arrow X at a certain frequency.
, And the first permanent magnet 6 also reciprocates in the same direction via the link mechanism 14. Second
Since the same magnetic pole of the permanent magnet 8 faces the first permanent magnet 6, the first and second permanent magnets 6 move together with the reciprocating movement of the first permanent magnet 6.
The facing areas of the permanent magnets 6 and 8 gradually change, and the repulsive force fluctuates periodically. As a result, the distance between the second permanent magnet 8 and the first permanent magnet 6 fluctuates periodically, and the top plate 4 periodically swings around the pivot shafts 54 in the direction of arrow Z.

[0032]

Since the present invention is configured as described above, it has the following effects. According to the first aspect of the present invention, the top plate is swung about a predetermined axis by reciprocating the first permanent magnet by the driving source and reciprocating the opposing second permanent magnet. With this configuration, the configuration of the rotation swinging mechanism is simplified, and a compact and inexpensive shaker can be provided.

According to the second aspect of the present invention, the reciprocating movement of the first permanent magnet changes the facing area of the first and second permanent magnets to reciprocate the second permanent magnet. By utilizing the repulsive force of the first and second permanent magnets, the driving force can be transmitted in a non-contact manner, and a vibration exciter with extremely low noise can be provided.

Further, according to the third aspect of the present invention,
Since the second permanent magnet is reciprocated perpendicular to the moving direction of the first permanent magnet, the facing area of the first and second permanent magnets can be easily changed in a small space,
A compact shaker can be provided.

According to the fourth aspect of the present invention, the drive source and the first permanent magnet are connected via the link mechanism, and the first permanent magnet is connected to the load adjusting means, so that the load applied to the top plate can be reduced. Since the neutral position of the drive source is determined accordingly, the neutral position of the drive source is appropriately set regardless of the magnitude of the load, and the reliability of the vibrator can be improved.

According to the fifth aspect of the present invention, the elastic means is attached to both sides of the center of swinging of the top plate, and the top plate is balanced by the elastic force of the elastic means. Can also respond.

Further, according to the invention described in claim 6,
The top plate is swung about a predetermined axis by reciprocating the first permanent magnet by the driving source to change the area facing the second permanent magnet, so that a mechanism for sliding the second permanent magnet is provided. This eliminates the necessity and further simplifies the configuration of the rotation swinging mechanism and the vibration exciter.

According to the seventh aspect of the present invention, the drive source and the first permanent magnet are connected via the link mechanism, and the first permanent magnet is connected to the load adjusting means, so that the load applied to the top plate can be reduced. Since the neutral position of the drive source is determined accordingly, the neutral position of the drive source is appropriately set regardless of the magnitude of the load, and the reliability of the vibrator can be improved.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional perspective view of a rotation swing mechanism according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional perspective view of a rotation swing mechanism according to a second embodiment of the present invention.

FIG. 3 is a partial cross-sectional perspective view of a rotation rocking mechanism according to a third embodiment of the present invention.

FIG. 4 is a partial cross-sectional perspective view of a rotation rocking mechanism according to a fourth embodiment of the present invention.

[Explanation of symbols]

 2 Base plate 4 Top plate 6 First permanent magnet 8 Second permanent magnet 14 Link mechanism 16 Drive source 24 Load adjusting means 42, 54 Pivot shaft M1, M2, M3, M4 Rotation swing mechanism

Claims (7)

[Claims] 1. A base plate, a top plate which is separated from the base plate by a predetermined distance and is swingably mounted around a predetermined axis, a drive source fixed to the base plate, and connected to the drive source. A first permanent magnet slidably mounted on the base plate, and a second permanent magnet slidably mounted on the base plate with the same magnetic pole facing the first permanent magnet and slidably mounted on the base plate. A rotation rocking mechanism, wherein the top plate is rocked around the predetermined axis by reciprocating the first permanent magnet and reciprocating the second permanent magnet by a source. 2. The reciprocating movement of the first permanent magnet changes the facing area of the first and second permanent magnets to change the second permanent magnet.
The rotation swing mechanism according to claim 1, wherein the permanent magnet is reciprocated. 3. The rotation oscillating mechanism according to claim 1, wherein said second permanent magnet is reciprocated perpendicularly to a moving direction of said first permanent magnet. 4. The drive source and the first permanent magnet are connected via a link mechanism and a load adjusting means is connected to the first permanent magnet, and the drive source is neutralized according to a load applied to the top plate. 4. The method according to claim 1, wherein the position is determined.
The rotation swinging mechanism according to any one of the above. 5. The rotation according to claim 1, wherein elastic means are attached to both sides of the center of swing of the top plate, and the top plate is balanced by the elastic force of the elastic means. Swing mechanism. 6. A base plate, a top plate which is separated from the base plate by a predetermined distance and is mounted to be swingable about a predetermined axis, a drive source fixed to the base plate, and connected to the drive source. A first permanent magnet slidably attached to the base plate, and a second permanent magnet fixed to the top plate with the same magnetic pole facing the first permanent magnet, and A rotation rocking mechanism, wherein the top plate is rocked around the predetermined axis by reciprocating one permanent magnet to change an area facing the second permanent magnet. 7. The drive source and the first permanent magnet are connected via a link mechanism and a load adjusting means is connected to the first permanent magnet, and the drive source is neutralized according to a load applied to the top plate. 7. The rotation swing mechanism according to claim 6, wherein the position is determined.