JP3413482B2 - 3-axis vibration test equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an X direction, a Y direction,
The present invention relates to a triaxial vibration testing device capable of simultaneously generating vibration in the Z axial directions. This vibration test equipment is used to check the behavior of various structures, structures, vibration control devices, vibration isolation devices, etc. when an earthquake is actually encountered, that is, to check the seismic performance of the DUT, vibration control and vibration isolation performance. For this reason, it is a vibration test device for accurately generating a seismic wave for giving a real seismic waveform or a simulated seismic waveform to a test object. Especially, in order to reproduce the situation as close as possible to the actual seismic phenomenon, the X direction , Y
It is a three-axis vibration test device capable of simultaneously generating vibrations in three directions, the Z direction and the Z direction.

[0002]

2. Description of the Related Art In order to construct a vibrating device that simultaneously vibrates in three axial directions, a unidirectional vibration generator is used in the X, Y and Z directions.
3 units are connected in each direction, the vibration in one direction (for example, X direction) generated by one vibration generator is transmitted to the vibration table, and the other two vibration generators (Y direction, Z direction) ) Is required to transmit the vibration in that direction (X direction). Conventionally, a hydraulic bearing has been used for such a mechanism.

[0003]

Therefore, the conventional vibration device requires a hydraulic pressure generating device for operating the hydraulic pressure bearing, a cooling device for the hydraulic oil, and the like, which inevitably requires a large scale of equipment. It takes a lot of time and effort to install and maintain each device. Further, measures against noise generated by the hydraulic pressure generator require enormous cost and a considerable installation space, and in general, it is necessary to install a dedicated test building.

Therefore, the object of the present invention is to provide a compact, lightweight and easy to assemble and maintain without requiring a hydraulic pressure source.
An object is to provide an axial vibration test device.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a common base, a vibration table, and an X-direction applying device installed on the common base for applying vibrations in the X-direction, Y-direction, and Z-direction to the vibration table. A three-axis direction vibration test apparatus including a shaker, a Y-direction shaker, and a Z-direction shaker, and driving the X-direction shaker, the Y-direction shaker, and the Z-direction shaker. Each of the parts has two stages of first linear motion bearing means that enables movement in one axial direction and second linear motion bearing means that enables movement in the direction perpendicular to the one axial direction. And the driven body is connected to the vibration table via a biaxial orthogonal linear motion bearing that is movable in biaxial orthogonal directions, and the Z axis biaxial orthogonal linear motion bearing is connected to the vibration table.
The movable table can be moved in the X and Y directions.
Combined with the lower surface of the vibration table,
Between the cable and the drive unit of the Z-direction vibrator.
Between the intermediate table and the vibration table.
A plurality of Z-direction orthogonal linear motion bearings are arranged between them.
It is characterized by being placed .

In the present triaxial vibration test apparatus, the biaxial orthogonal linear motion bearing for the X direction is mounted on the first side surface of the vibration table so as to move the vibration table in the Y and Z directions. Combined, the two-axis orthogonal linear motion bearings for the Y direction are arranged so that the first table in the vibration table is movable so as to move the vibration table in the X and Z directions.
Are combined in the second side surfaces perpendicular direction Ru.

[0007]

In the present triaxial vibration test apparatus,
A plurality of Z-direction guide mechanisms may be arranged between the common base and the intermediate table. In this case, the guide mechanism includes a guide shaft extending in the Z direction and a guide holding the guide shaft. It is composed of a shaft holder and a cylindrical linear guide installed in the intermediate table and guided along the guide shaft.

Further, in the triaxial vibration test apparatus,
At least one air spring mechanism may be arranged between the common base and the intermediate table.

The first linear motion bearing means has two first guide rails fixed in parallel to each other on the first bearing unit connecting plate, and each of the two first guide rails. It is possible to construct a combination of two first circulation type rolling guide mechanisms which are spaced apart from each other.
The linear motion bearing means fixes the two second guide rails parallel to each other below the second bearing unit connecting plate as the driven body, and also the two second guide rails. Can be configured by combining two second circulation type rolling guide mechanisms, each of which is spaced apart from each other, and further four second circulation type rolling guide mechanisms can be formed with four of the first circulation type rolling guide mechanisms. Mounted on a rolling guide mechanism, and the two second guide rails are respectively attached to the two first guide rails.
The two-axis orthogonal linear motion bearing is constructed by combining them so as to be orthogonal to the guide rail, and the first bearing unit connecting plate is the X-direction exciter or the Y-direction exciter, or The second bearing unit connecting plate is connected to the drive unit of the Z-direction shaker, and is connected to the vibration table.

As described above, by constructing a three-axis direction vibration test apparatus using a plurality of two-axis orthogonal linear motion bearings, the apparatus is small and lightweight, easy to assemble and maintain, and the entire facility is simple. Since there is no source of pollution noise, there is no need to install a soundproof wall, etc., and it is possible to provide a triaxial vibration test device that can be installed in one corner of the existing experimental building. .

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is constructed by using a plurality of linear motion bearings with a circulating rolling guide mechanism.
A bearing for linear motion orthogonal to the axis can be installed in three directions, X, Y and Z.
A characteristic is that a three-axis vibration test apparatus is configured by combining them in the axial direction, and a case of providing a three-axis vibration test apparatus for seismic wave reproduction will be described below.

With reference to FIGS. 1 and 2, a vibration table 10 is provided.
Is installed on the common base 11 with the structure described below. The common base 11 has a rising portion 11-1 having an L-shaped planar shape that rises upward from the main surface thereof. The vibration table 10 is connected to the drive unit 20X-1 of the X-direction vibrator 20X fixed on the rising portion 11-1 of the common base 11 via the biaxial orthogonal linear motion bearing 30X. The vibration table 10 also includes a start-up unit 11- of the common base 11.
Drive unit 20Y-of Y-direction vibrator 20Y fixed on
They are connected to each other via a 1-axis and 2-axis orthogonal linear motion bearing 30Y. The vibration table 10 is further connected to the intermediate table 12 directly connected to the drive unit 20Z-1 of the Z-direction vibrator 20Z via a plurality of (here, four) bearings 30Z for biaxial orthogonal linear motion. . At least three such biaxial orthogonal linear motion bearings 30Z are sufficient, and in the case of three, they are arranged so as to be located at the vertices of an equilateral triangle.

As is well known, the X-direction vibrator 20X is for vibrating the vibration table 10 in the X-direction by reciprocally moving the drive unit 20X-1 in the X-axis direction. This type of exciter is provided by, for example, a combination of a permanent magnet and a movable coil, but is not limited to this. The same applies to the Y-direction vibrator 20Y and the Z-direction vibrator 20Z. Therefore, detailed description of the structure of the vibrator is omitted here.

The main surface of the common base 11 and the intermediate table 12
In order to increase the rigidity of the vibration table 10 against the rotational movement in the horizontal plane, the guide mechanism 13 in the Z direction is provided between
Are provided in plurality (here, four). The guide mechanism 13 includes a guide shaft holder 13-1 fixed on the main surface of the common base 11, a guide shaft 13-2 attached to the guide shaft holder 13-1 and extending in the Z direction, and inside the intermediate table 12. And a cylindrical linear guide 13-3, which is incorporated in the intermediate table 12 to allow only the vertical movement of the intermediate table 12. With such a plurality of guide mechanisms 13, it is possible to bear the allowable rotation moment in the vertical plane generated on the vibration table 10 and to perform the movement in the Z direction with very little resistance. At least three such guide mechanisms 13 are sufficient, and in the case of three, they are arranged so as to be located at the vertices of an equilateral triangle.

The intermediate table 12 further includes the common base 11.
It is supported by two air spring mechanisms 14 fixed on the main surface of. The air spring mechanism 14 includes an air tank 14-1 for supplying compressed air and an air spring 14-2 that operates by the compressed air supplied from the air tank 14-1.
Although one air spring mechanism 14 may be provided, when two air spring mechanisms 14 are installed, they are arranged side by side on the center line of the intermediate table 12 in the Y direction as shown in the drawing, or the center of the intermediate table 12 in the X direction. It is preferable to arrange them in a line. In this way, the intermediate table 12 can carry a vertical load and a static center point is maintained. That is, the vibration table 1 receives the vertical load due to gravity by the air spring mechanism 14.
0 loading load capacity and Z-direction shaker 20Z
You can maximize your ability.

Biaxial orthogonal linear motion bearings 30X, 30Y,
30Z has the same structure, and the case of the biaxial orthogonal linear motion bearing 30Z will be described below with reference to FIGS. 3 to 5. 3 to 5, two first guide rails 32 are provided on the first bearing unit connecting plate 31 so as to extend in the uniaxial direction in parallel with each other. Two first bearing units 33 are associated with each of the two first guide rails 32. The second bearing unit 34 is fixed on each of the four first bearing units 33. The first and second bearing units 33 and 34 each act as a linear motion bearing. A second guide rail 35 is provided between the two second bearing units 34 on different first guide rails 32 so as to be orthogonal to the first guide rail 32. A second bearing unit connecting plate 36 is fixed on the two second guide rails 35. With such a structure, the second bearing unit connecting plate 36 is movable only in the X direction and the Y direction shown in FIG.

As described above, one set of bearing blocks is a combination of two bearing units on one guide rail, and a total of four sets of bearing blocks are combined in two stages to form a biaxial orthogonal linear motion bearing. It makes up 30Z.
Then, the first bearing unit connecting plate 31 is fixed to the upper surface of the intermediate table 12, and the second bearing unit connecting plate 36.
Is fixed to the lower surface of the vibration table 10. Therefore, the vibration table 10 is movable in the X direction and the Y direction.

The two-axis orthogonal linear motion bearings 30X and 30Y have exactly the same structure but different installation structures. As for the two-axis orthogonal linear motion bearing 30X, the first bearing unit connecting plate 31 is the drive unit 20 of the X-direction vibrator 20X.
The second bearing unit connecting plate 3 fixed to X-1
6 is fixed so as to be parallel to the side surface of the vibration table 10. This means that the vibration table 10 can be excited in the X direction while being movable in the Z direction and the Y direction. On the other hand, regarding the biaxial orthogonal linear motion bearing 30Y, the first bearing unit connecting plate 31 is the Y-direction vibrator 20.
The second bearing unit connecting plate 36 is fixed to the Y drive unit 20Y-1 so as to be parallel to the side surface of the vibration table 10. This means that the vibration table 10 can be vibrated in the Y direction while being movable in the Z direction and the X direction.

As described above, the biaxial orthogonal linear motion bearing 3
The vibration table 10 can be moved in three axial directions by using 0X, 30Y and the bearing 30Z for two-axis orthogonal linear motion as a joint for orthogonal horizontal vibration and a joint for vertical vibration. It is possible to construct a shaking table for seismic wave reproduction in three axes.

Each bearing unit corresponds to the first bearing unit 3
As for FIG. 3, as shown in FIG. 6 and FIG. 7, it has a plurality of spheres 33-1 made of a four-row high-rigidity material that rolls continuously in the first bearing unit 33. In the first bearing unit 33, the plurality of spherical bodies 33-1 roll on the first guide rail 32 by rolling using the four grooves 32a, which are each formed into a circular shape on the first guide rail 32, as guides. Along with that, linear movement with low friction is possible. The four grooves 32 a are formed on the left, right, up and down with respect to the cross section of the first guide rail 32. And sphere 3
The row 3-1 is arranged at an angle of 45 ° above and below with respect to the moving plane passing through the center of the quadrangle formed by the four grooves 32a. A linear motion bearing with equivalent rigidity in each direction is constructed. Such a bearing unit itself is known as a circulating rolling guide mechanism.

[0022]

As described above, since the triaxial vibration test apparatus according to the present invention does not use the conventional hydrostatic bearing, it does not require a hydraulic pressure generation source and an accompanying cooling device. Therefore, it is not necessary to take measures against noise by the hydraulic pressure generation source and the cooling device, electric power for driving them, installation space, and complicated maintenance of the hydraulic oil to be used. Due to the reduction of construction period, environmental protection, energy saving, space saving, reduction of maintenance cost, etc., customers who have been difficult or unable to install the system can install this device.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of an embodiment when a three-axis direction vibration test apparatus according to the present invention is applied as a seismic wave reproduction vibration test apparatus.

FIG. 2 is a plan view of the triaxial vibration test apparatus shown in FIG.

FIG. 3 is a plan view for explaining the configuration of a biaxial orthogonal linear motion bearing used in the triaxial vibration testing apparatus shown in FIG.

FIG. 4 shows the bearing for biaxial orthogonal linear motion shown in FIG.
It is the side view seen from the arrow A direction.

FIG. 5 is a perspective view of the biaxial orthogonal linear motion bearing shown in FIG.
It is the side view seen from the arrow B direction.

FIG. 6 is a front view for explaining the configuration of the bearing unit shown in FIG.

7 is a cross-sectional view taken along the line C-0-C ′ of the bearing unit shown in FIG.

[Explanation of symbols]

10 Vibration table 11 common base 12 Intermediate table 13 Guide mechanism 13-1 Guide shaft holder 13-2 Guide shaft 13-3 Cylindrical linear guide 14 Air spring mechanism 14-1 Air tank 14-2 Air spring 20X X direction shaker 20Y Y direction shaker 20Z Z-direction shaker 30X, 30Y, 30Z Biaxial orthogonal linear motion bearing 31 First bearing unit connecting plate 32 First guide rail 33 First bearing unit 34 Second bearing unit 35 Second guide rail 36 Second bearing unit connecting plate

Claims (5)

(57) [Claims] 1. A common base, a vibration table, and an X-direction vibration exciter installed on the common base for applying vibrations in the X-direction, the Y-direction, and the Z-direction to the vibration table.
In a three-axis direction vibration test apparatus including a directional exciter and a Z-direction exciter, each of the X-direction exciter, the Y-direction exciter, and the drive unit of the Z-direction exciter, The first linear motion bearing means that allows the movement in the uniaxial direction and the second bearing means for the linear motion that enables the movement in the direction perpendicular to the uniaxial direction are combined in a two-stage stack to form a cover. The driving body is connected to the vibration table via a biaxial orthogonal linear motion bearing that is movable in biaxial orthogonal directions, and the biaxial orthogonal linear motion bearing for the Z direction is the vibration table.
The vibration table so that the bull can move in the X and Y directions.
The lower surface of the table is combined with the vibration table.
And an intermediate table between the drive unit of the Z-direction shaker and
Z between the intermediate table and the vibration table.
A three-axis vibration test apparatus , wherein a plurality of the above-mentioned two-axis orthogonal linear motion bearings are arranged . 2. The triaxial vibration test apparatus according to claim 1, wherein the bearing for the biaxial orthogonal linear motion for the X direction is provided on the vibration table so as to move the vibration table in the Y direction and the Z direction. Combined with the first side surface, the biaxial orthogonal linear motion bearing for the Y direction is arranged in a direction perpendicular to the first side surface of the vibration table so as to move the vibration table in the X direction and the Z direction. Combined on the side of 2
3 axial vibration test apparatus characterized by being. 3. A three-axis direction vibration testing apparatus according to claim 2, Z between the common base and the intermediate table
A plurality of directional guide mechanisms are arranged, and the guide mechanisms are
Direction, a guide shaft holder that holds the guide shaft, and a cylindrical linear guide that is incorporated in the intermediate table and guided along the guide shaft. Directional vibration test equipment. 4. The triaxial vibration test apparatus according to claim 3, further comprising at least one air spring mechanism arranged between the common base and the intermediate table. . 5. The triaxial vibration test apparatus according to claim 4, wherein the first linear motion bearing means includes two first guide rails parallel to each other on the first bearing unit connecting plate. It is fixed and is formed by combining two first circulating type rolling guide mechanisms spaced apart from each other of the two first guide rails. Two second guide rails are fixed in parallel to each other on the lower side of the second bearing unit connecting plate as a driving body, and the two second guide rails are connected to each other.
Each of the two guide rails are spaced apart from each other, and are combined with two second circulation type rolling guide mechanisms, and four of the second circulation type rolling guide mechanisms are combined with four of the first circulation type rolling guides. The two second guide rails are attached to the guide mechanism and the two first guide rails are respectively attached to the two first guide rails.
The two-axis orthogonal linear motion bearing is configured by combining them so as to be orthogonal to the guide rail, and the first bearing unit connecting plate is the X-direction exciter or the Y-direction exciter, or A three-axis vibration test apparatus, characterized in that the vibration test apparatus is connected to a drive unit of a Z-direction shaker, and the second bearing unit connecting plate is connected to the vibration table.