JPH0510156B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-way vibration exciter that vibrates in both horizontal and vertical directions or in two horizontal directions simultaneously.

The prior art will be explained using drawings. FIG. 1 is a diagram showing a first example of the prior art, in which a is a plan view and b is an A
-A sectional view, c is a BB sectional view, and FIG. 2 is a sectional view similarly showing a second example.

The device shown in FIG. 1 includes drive coils 2-1, 3-
1 and the vibration table 1, the drive coil 3-1 of the vertical vibration generator 3 needed relief in both the vertical and horizontal directions, as shown in the figure. Therefore, the drive coil 3-1 is a rectangular coil instead of the usual cylindrical shape, and the coil protruding from the magnetic flux Φ is wasted, resulting in a problem that the efficiency of the magnet is reduced. Although the vertical vibration generator 3 has been described as an example, the same applies to the horizontal vibration generator 2.

The device shown in FIG. 2 is a multidirectional vibrator described in Utility Application No. 153847 of 1981 filed by the applicant of the present invention. In this device, vibration shafts 2-2, 3-2 are slidably guided in the axial direction by hydraulic guides 2-3, 3-3, and vibrated via hydrostatic bearings 2-4, 3-4. 1 unit
The structure is such that it vibrates. Therefore, cylindrical coils can be used for the drive coils 2-1 and 3-1, and the problem of reduced efficiency of the magnets mentioned above is solved. However, this device also has the following problems.

(1) Since the vibration table 1 is provided with the static pressure bearings 2-4 and 3-4, the vibration table 1 is a specific device and cannot be replaced.

(2) Therefore, regardless of the purpose of using the device, the limits are an acceleration of 5G and a frequency of about 100Hz.

(3) A guide portion 4' is required to prevent torsional vibration. The center of the guide portion 4' must be brought out with high precision, making the manufacturing process quite difficult.

In view of the above-mentioned problems, an object of the present invention is to provide a two-way vibrator in which the vibrating table is replaceable, the acceleration and vibration frequency are improved, and a guide part for preventing torsional vibration is unnecessary.

In order to achieve this object, the present invention combines a bidirectional vibration generator into a unit, vibrates an excitation shaft in two directions in the unit, and attaches a vibration table of a size according to the purpose to the tip of this excitation shaft. An example of this will be described below.

FIG. 3 is a sectional view showing one embodiment of the present invention, and a
is a front sectional view, and b is a side sectional view.

As shown in the figure, this embodiment is a vibration exciter in two directions, horizontal and vertical, and the vibration shaft 5 is a cylindrical shaft portion 5-1.
and a drive table 5-2 provided at one end of the shaft portion 5-1. The drive table 5-2 includes:
Although not shown, a vibration table of a size appropriate for the purpose is installed. Note that the drive table 5-2 can also be used directly as a vibration table.

The other end of the shaft portion 5-1 is connected to the table 6-1 of the vertical vibration generator 6 via a vertical coupling 8, and the opening 5-1 provided in the shaft portion 5-1 is connected to the table 6-1 of the vertical vibration generator 6.
3, 5-3, a horizontal guide shaft 7-1 of the horizontal vibration generator 7 passes loosely therethrough, and the horizontal guide shaft 7-1 is connected to the shaft portion through a horizontal coupling 9 inside the shaft portion 5-1. It is connected to 5-1. Note that the vertical coupling 8 and the horizontal coupling 9 are known T-type hydrostatic bearings.

A drive coil 6-2 is attached to the end of the table 6-1 of the vertical vibration generator 6, and the drive coil 6-2 is inserted into the yoke 6-3. The yoke 6-3 is fixed to the base and has an excitation coil 6-4 inside. A vertical guide shaft 6-5 is provided at the bottom of the table 6-1, and is guided by a vertical guide bearing 6-6 using a static pressure bearing so that it can move only in the vertical direction. An air spring 12 provided below the vertical guide shaft 6-5 supports static loads in the vertical direction.

The horizontal guide shafts 7-1, 7-1 are guided by horizontal guide bearings 7-4, 7-4 using static pressure bearings so that they can move only in the horizontal direction.
Tables 7-2, 7-2 of the vibration generators 7, 7 are provided at the ends of the horizontal guide shafts 7-1, 7-1. As the vibration generators 7, 7, like the vertical vibration generator 6, known electrodynamic vibration generators are used. The vibration generators 7, 7 operate in opposite phases, and the horizontal guide shafts 7-1, 7-1
Excite.

Although this embodiment shows a two-way vibrator in the horizontal and vertical directions, the present invention can also provide a two-way vibrator in the horizontal direction.

As explained in detail above, the two-direction vibration generator is integrated into a unit, and an exchangeable vibration table is attached to the tip of the excitation shaft that vibrates in two directions. ,Frequency
It has the effect of being able to obtain frequencies of 500Hz or more. Also,
Since a guide part for preventing torsional vibration is not required, the manufacturing operation is significantly improved.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a first example of the prior art, in which a is a plan view, b is a cross-sectional view taken along the line AA, and c is a cross-sectional view taken along the line B-B. FIG. 2 is a sectional view showing a second example of the prior art. FIG. 3 is a sectional view showing an embodiment of the present invention, in which a is a front sectional view and b is a side sectional view. 5... Vibration axis, 6... Vertical vibration generator, 7...
...Horizontal vibration generator, 8...Vertical coupling,
9...Horizontal coupling ring, 10...Vertical guide bearing, 11...Horizontal guide bearing, 12...Air spring.

Claims (1)

[Claims] 1. A vibration shaft 5 consisting of a shaft portion 5-1 and a drive table 5-2, and an electrodynamic vibration generator 7 provided parallel to and facing the shaft portion 5-1. , 7, one end is attached to the table 7-2, 7-2 of the vibration generator 7, 7, and the other end is attached to the joint part 9 with the shaft part 5-1 of the vibration shaft 5 by a hydrostatic pressure bearing. shaft parts 7-1, 7-1 that are connected to each other and vibrate in one horizontal direction;
A horizontal vibration generator comprising guide bearings 7-4, 7-4 using static pressure bearings that guide the shaft parts 7-1, 7-1 in the vibration direction of the shaft parts 7-1, 7-1; , a joint part 8 using a static pressure bearing that connects to one end of the shaft part 5-1 of the vibration shaft 5, and the shaft part 5.
A guide shaft 6-5 located in the axial direction of -1 is provided on the table 6-1, and the guide shaft 6-5
an electrodynamic horizontal or vertical vibration generator 6 equipped with a guide bearing 6-6 using a static pressure bearing that guides the vibration direction of the guide shaft in the vibration direction of the guide shaft; means 12 for supporting the load of the vibration shaft 5; A two-way vibration exciter characterized by comprising: