JPH0333526A - Damping device - Google Patents

Abstract

PURPOSE:To obtain a compact damping device by supporting a weight with a prescribed distance on the surface of a structure to be damped, and arranging linear motors in the two squarely crossing directions between the bottom face of the weight and the surface of the structure. CONSTITUTION:A weight 1 is supported on the floor face of a structure 2, keeping a prescribed distance (d) between. On the opposing faces of the weight 1 and the structure 2, the drive side 3 and the stationary side 4 of linear motors are respectively provided. The drive side linear motors 3 are fitted in the two squarely crossing directions to drive the weight 1 in all directions on a horizontal plane. In this way, the damping device is compacted, and at the same time it is simple and appears beautiful because of dispensing with a load transmitting mechanism such as a link mechanism.

Description

[Detailed description of the invention] [Industrial application field] The present invention can also be used in active materials such as structures.

This article relates to semi-active damping devices.

[Conventional technology]

In conventional vibration damping devices, when driving a single weight, the sixth
As shown in the figure, there is a method of giving reciprocating motion to the weight 1 using a cylinder-type vibration exciter 12, and the rotation of the motor 13 is controlled by a rack and pinion 14 (Figure 7) or a ball screw 15 (Figure 8).
In Figure 1), a method such as driving the weight 1 instead of linear motion is used. In addition, as a technology related to the effective mass of a dynamic damper, patent application No. 96042 of 1999
A patent application has been filed for the No.

[Problem to be solved by the invention]

The prior art as described above has the following problems.

(11) A three-dimensional space and a load transmission mechanism are required to install and operate the drive system.

(2) To move the weight in all horizontal directions, two orthogonal
It requires a vibration exciter installed in the same direction, and a mechanism that allows the motor and rack and pinion system, and the support at both ends of the motor and ball screw system to rotate freely.

(3) Furthermore, noise generation is a problem in devices that convert rotation into linear motion.

An object of the present invention is to provide a vibration damping device that solves the above-mentioned problems and is effective in all horizontal directions.

[Means to solve the problem]

A weight is supported so as to maintain a constant gap from the floor of the structure whose vibrations are to be damped, and a linear motor is installed at a position opposite to the gap at a constant interval. As a means of maintaining gaps at regular intervals.

A method using static pressure bearings or spherical rollers, or a magnetic levitation method is adopted.

By arranging the drive side of the linear motor in two orthogonal directions, a single weight can be driven in all horizontal directions from the binding.

[For production]

By driving the linear motor, a weight movably supported on the floor of the structure moves in the horizontal direction, and is absorbed by the horizontal reaction force generated on the floor to produce a damping effect.

〔Example〕

In FIGS. 1(a) and 1(b), a weight 1 is supported at a constant distance d from the floor of a structure 2. The drive side 3 and stationary side 4 of the K'J near motor are installed on the facing surfaces of the weight 1 and the structure 2. When viewed from above, the linear motor 3 on the drive side is mounted facing two orthogonal directions, so that the weight 1 can be driven in all directions in a horizontal plane.

The orotribe side 3 and the stationary side 4 may be reversely arranged.

By arranging the linear motors 3 and 4 with a certain gap in this way, it becomes possible to drive the weight as long as there is a planar space, making it more compact, and at the same time eliminating the need for a link mechanism μ or any load transmission mechanism. Therefore, a vibration damping device that is simple and has an excellent appearance can be obtained.

As means for supporting the weight 1 so as to maintain a constant distance from the floor surface of the structure, there are the magnetic levitation method using the electromagnet 5.5' shown in FIG. 2, the air levitation method using the air 6 shown in FIG. There is a method using the static pressure bearing 7 shown in Fig. 4, a method using the spherical roller 8 shown in Fig. 5, etc., but in the present invention, as long as the spacing can be maintained constant, the support method is #! It is not limited to j′. In Figs. 1 to 5 of Mat-1, the lower surface of the single weight and the floor surface are shown as horizontal surfaces, but they can also be sloped if necessary.

It may be a curved surface, so it should be limited to horizontal surfaces.

〔Effect of the invention〕

The vibration damping device according to the present invention includes a weight movably supported at a constant interval on the surface of a structure to be damped, and two directions perpendicular to each other between the surface of the structure and the bottom surface of the weight. The following effects are produced by indulging in the linear motor placed in the .

(Since the 111J near motor is used, it is possible to drive the weight as long as there is a planar sweep.) A Yt vibration damping device is obtained.

(2) Since it is possible to drive the weight in all horizontal directions and does not require any load transmission mechanism in the link device, a simple and aesthetically pleasing vibration damping device can be obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an embodiment of the present invention, in which (a) is a side view;
(b) is a plan view. 2 to 5 are schematic diagrams showing various methods for movably supporting a weight at a constant distance from the floor of a structure. 6 to 8 are schematic diagrams of different conventional devices. 1... Weight 2... Structure floor surface 3.4.
...Linear motor (to) 3.4 Linear motor \-1~/

Claims (1)

[Claims] A weight supported at a constant interval on the surface of a structure to be damped, and a two
A vibration damping device comprising a linear motor arranged in a direction.