JPH03181636A - Vibration damper - Google Patents

Abstract

PURPOSE:To enable a vibrator to be driven in all the horizontal direction by forming the bottom of the vibrator of a part of a spherical surface, providing a slider connected to the bottom and perpendicular beams to which the slider is attached slidably, and driving the beams by using a motor. CONSTITUTION:A motor 6 drives a connection shaft 8 on the basis of a command from a controller or the like. A ball screw 4 is screwed via a gear 7 so that a nut 4a is moved along the ball screw. Simultaneously, beams 3 for holding the ball screw move a slider 2 so that the slider 2 drives a vibrator 1 through a universal joint 10 and a slide jig 9. The simultaneous movement of a pair of perpendicular beams moves the vibrator 1 in the synthetic direction. Since the vibrator 1 is supported on the spherical bottom thereof by a plurality of spherical seats, the lowermost portion at the bottom moves horizontally. Therefore, the vibrator 1 can be driven in all the horizontal direction, thereby obtaining a vibrationproof effect in all the direction.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a vibration damping device for a structure.

[Conventional technology]

FIG. 7 shows a side view of a first example of a conventional vibration damping device. In the figure, 1 is a vibrating body, 21 is an arc-shaped rail provided below the vibrating body, 22 is a wheel that is attached to the lower part of the vibrating body and rolls on the rail, and 23 is the vibrating body. The vibration exciter is attached to a fixed part on the side of the vibration body, and one end of the vibration exciter is connected to the side of the vibration body. This device applies a restoring force to the vibrating body 1 supported by wheels 22 rolling on a rail 21 by driving it with a cylinder-type vibration exciter 23. Fig. 8 shows a conventional vibration damping system. Figure 3 shows a side view of a second example of the device. In the figure, 1 is a vibrating body whose bottom part is formed by a part of a cylindrical surface, 20 is a roller that supports the cylindrical surface of the vibrating body, 24 is a motor, and 25 is the cylinder of the vibrating body. A rack 25a provided along the surface is connected to the shaft of the motor and is a pinion that meshes with the shaft.

This device uses a vibrating body l whose bottom part is cylindrical, and a roller 2.
The rack and pinion 25 installed at the bottom of the vibrating body 1 are
．． 25a in one direction to give a restoring force to the vibrating body. [Problems to be Solved by the Invention] Regarding the conventional vibration damping device, its damping effect is limited to the rail or rack. Limited to one direction with a binion installed. In order to obtain a sufficient damping effect, it is necessary to have a damping effect in all horizontal directions, and for this purpose, it is necessary to drive the vibrating body in two orthogonal directions, but conventional methods stably drive the vibration in two directions. Difficult to drive in direction. The present invention aims to provide a vibration damping device that can be stably driven in two directions in a horizontal plane.

[Means to solve the problem]

The present invention has solved the above problems, and includes a vibrating body whose bottom surface is formed of a part of a downwardly convex spherical surface, and a spherical seat that movably supports the bottom of the vibrating body in contact with the spherical bottom surface. , a slider connected to the bottom of the vibrating body, a horizontal beam that intersects perpendicularly in a horizontal projection plane, the slider is slidably attached to the three-dimensional intersection thereof, and has an engaging part at the end, and a horizontal beam that engages with the engaging part. The present invention relates to a vibration damping device comprising: a horizontal screw extending perpendicularly to the beam and rotatably held in a fixed part; and a motor provided in the fixed part for rotationally driving the screw.

[Effect]

In the vibration damping device of the present invention, when the motor turns the screw, the engaging portion moves along the screw, the common beam also moves in the moving direction of the engaging portion, and the slider also moves in the same direction. When both orthogonal beams move, the slider slides along the beam, and the bottom of the zero vibration body that moves in the composite direction of the movement directions of both beams is connected to the slider, and the bottom has a spherical shape. Since it is movably supported by the bottom surface, the bottom portion of the vibrating body can move in the combined direction of the movement directions of both beams.

〔Example〕

FIG. 1 is a side view of the first embodiment of the present invention. In this figure, the lower half is shown in cross section. FIG. 2 is a side view of the first embodiment of the present invention.
Referring to Figure 0, which is a cross-sectional view taken along line A-A in the figure, 1 is a vibrating body formed of a part of a spherical surface with a downwardly convex bottom, 2 is a slider provided below the vibrating body, and 3 is a beam provided horizontally passing through the slider. This beam consists of a pair of beams that are vertically separated but orthogonal in the horizontal projection plane. 4 is a horizontal ball screw that is rotatably held near the end of the beam and perpendicular to the beam; 4a is a horizontal ball screw that is provided at the end of the beam and is connected to the ball screw by a screw hole that is perpendicular to the beam; 5 is a bearing attached to the fixed part and rotatably holds the ball screw; 6 is a motor provided in the fixed part; 7 is a gear; 8 is the motor. a connecting shaft to which the gear is fixed, 9 a slide jig held in a hollow hole provided at the bottom of the vibrating body; 10;
11 is a universal joint provided between the slide jig 9 and the slider 20, and 11 is a universal joint provided between the vibrating body 1 and the slide jig 9 and between the slider 2 and the beam 3. A sliding guide 18 is made of a material with a small friction coefficient and holds the beam 3 in a slidable manner. The spherical seat is movably supported, and 19 is a support member to which the spherical seat is attached. The ball screw 4 is turned through the ball screw 7, and the nut portion 4a set thereon moves along the ball screw.

At the same time, the beam 3 holding the ball screw is attached to the slider 2
The slider 2 drives the vibrating body 1 via the universal joint 10 and the slide jig 9. When the pair of orthogonal beams move together, the slider 2 moves in the combined direction, driving the vibrating body 1 in the combined direction. In this embodiment, the vibrating body 1 has a spherical bottom supported by a plurality of spherical seats, so that the lowest part of the bottom can move horizontally. When the vibrating body moves in the horizontal direction, vertical movement and inclination occur in the hollowed-out portion of the vibrating body. This vertical movement and inclination can be absorbed by vertically sliding the slide jig 9 and rotating the universal joint part 100 times.

FIG. 3 is a partial side view of a second embodiment of the invention. In the figure, 1 is a vibrating body, 2 is a slider, 9 is a slide jig, 10 is a universal joint provided between the slide jig and the slider, 11 is a sliding guide, 12
1 is a cylindrical holder that holds the slide jig 9 via a sliding guide 11, and 13 is a safety device provided between the universal joint 10 and the slider 2 for cutting with a constant load. Since the parts other than the above are the same as those in the first embodiment, their explanation will be omitted. This embodiment differs from the first embodiment in that the slide jig 9 and the slide guide 11 are connected by a cylindrical holder 12. , the universal joint 10 and the slider 2 are connected via a safety device that disconnects the universal joint 10 and the slider 2 under a constant load, so that it is installed so as to protrude downward from the bottom of the vibrating body. The point is that when an abnormal load is applied, the vibrating body and the drive device are separated from each other to protect the drive device. This safety device 13 may be installed between the cylindrical jig 12 and the vibrating body 1.

FIG. 4 is a partial side view of a third embodiment of the invention. In the figure, 1 is a vibrating body, 72 is a slider, 3 is a beam, and 9
is a slide jig, 10 is a universal joint, 11
14 is a sliding guide, and 15 is a rail attached to the beam 3. Portions other than the above are the same as in the first embodiment.

This embodiment differs from the first embodiment in that the slider 2 does not directly slide around the beam 3 via the sliding guide 11;
The difference is that a sliding guide 14, which is attached to the slider 2 and has a different shape from the first embodiment, is configured to slide on a rail 15 attached to the beam 3. This embodiment has the advantage that even if the beam 3 is made thicker when a large driving force is required, there is no need to enlarge the sliding guide or the like. A plurality of inner sliding guides 14 and rails 15 may be provided in parallel.

FIG. 5 is a plan view showing a part of a driving device according to a fourth embodiment of the present invention. In the figure, 4 is a ball screw, 6 is a motor, 7 is a gear, 8 is a connecting shaft, 16 is a reducer or speed increaser provided according to the speed of the motor, and 17 is a torque limiter. 0 Parts other than the above is the same as in the first embodiment.

This embodiment is an example in which driving in one direction is performed by two motors, and a reduction gear or a speed increaser is provided, and a torque limiter is provided to protect the drive system when it starts moving with excessive torque. This embodiment differs from the first embodiment in that Of these, the connecting shaft 8 can also be omitted. Also, motor 6
It is also possible to further increase the number of motors so that one ball screw can be driven by a plurality of motors.

FIG. 6 is a plan view showing a portion of a driving device according to a fifth embodiment of the present invention. In the figure, 2 is a slider, 3 is a beam, 3a is a connecting member connecting the two beams, 4 is a ball screw, and 4a is a nut. Portions other than the above are the same as in the first embodiment.

In this embodiment, two parallel beams are connected by a connecting member 3a to increase the rigidity of the part constituted by them, and instead of the ball screws 4 provided at both ends of each beam in the first embodiment. This is characterized in that a nut 4a is provided at one end of each beam, and has the advantage that the number of ball screws can be reduced.

As described above in detail, the device of this embodiment can drive the bottom of the vibrating body in all directions within a horizontal plane, and therefore can obtain vibration damping effects in all directions.

〔Effect of the invention〕

In the vibration damping device of the present invention, the bottom of the vibrating body is formed of a part of a spherical surface, the bottom is movably supported by a spherical seat,
A beam orthogonal to each other in the horizontal projection plane is provided, a slider is slidably attached to the three-dimensional intersection of the beam, the slider is connected to the bottom of the vibrating body, and the beam is connected to the motor via a screw and an engaging part. Since the vibrating body can be driven in all horizontal directions, vibration damping effects can be obtained in all directions.

[Brief explanation of drawings]

FIG. 1 is a side view of the first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1, FIG. 3 is a partial side view of the second embodiment of the present invention, and FIG. is a partial side view of a third embodiment of the present invention,
FIG. 5 is a partial plan view of a fourth embodiment of the present invention, FIG. 6 is a partial plan view of a fifth embodiment of the present invention, and FIG. 7 is a side view of a first example of a conventional vibration damping device. Figure 8 shows the second part of the conventional vibration damping device.
FIG. 3 is a side view of the example. 1... Vibrating body, 2... Slider, 3...
Beam, 3a... Connecting material, 4... Pole screw,
4a... Nut, 5... Bearing, 6... Motor, 7... Gear, 8... Connecting shaft, 9...
Slide jig, 10... Universal joint, 11... Sliding guide, 12... Cylindrical holder, 1
3...Safety device, 14...Sliding guide, 15
...Rail, 16...Reducer or speed increaser, 1
7... Torque limiter, 18... Ball seat, 19.
...Supporting material, 20...Roller, 21...Rail, 22...Wheel, 23...Vibrator, 24...
・Motor, 25...Rack, 25a...Pinion.

Claims (1)

[Claims] A vibrating body formed of a part of a spherical surface with a downwardly convex bottom, a spherical seat that movably supports the bottom of the vibrating body in contact with the spherical bottom, a slider connected to the bottom of the vibrating body, and a horizontal a horizontal beam that intersects perpendicularly in the projection plane, the slider is slidably attached to the three-dimensional intersection thereof, and has an engaging part at the end, which engages with the engaging part, is perpendicular to the beam and is rotatable at a fixed part; 1. A vibration damping device comprising: a horizontal screw held at a fixed portion; and a motor provided at a fixed portion for rotationally driving the screw.