JPS59213286A - Stator support of surface wave motor - Google Patents

Abstract

PURPOSE:To obtain a highly efficient surface wave motor by supporting an elastic unit by an elastic unit having the bending vibration of intrinsic vibration frequency and/or twisting vibration or a slide or an acoustic insulator capable of moving in parallel with the vibrating direction. CONSTITUTION:A rod-shaped elastic unit 1 creates a traveling wave due to a bending vibration, and is supported at a point A on a neutral axis B. The point A is vibrated in a perpendicular direction to the neutral axis, and simultaneously rotatably vabrated at the point A as a center. One end of an elastic unit 2 is secured to the point A, and the other end is fixedly supported. The diameter and the length of the round rod of the unit 2 are set so that the intrinsic vibration frequency of the bending and twisting of the unit 2 are equally to the vibration frequency of the traveling wave of the unit 1, thereby eliminating the influence to the vibration system of the unit 1. Accordingly, a highly efficient surface wave motor can be provided. A spring is used, or a slide member which can move in the vibrating direction, or an acoustic insulator is used to support it.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stator support for a surface wave motor. A traveling wave is generated due to the motion, and there is no stationary part.Therefore, the fixed f is supported by a snow ring or an acoustic insulator, but when the rod-shaped elastic body is photographed, It must be supported in a way that does not add force that would damage the system.It must also be taken into consideration from the point of view of efficiency that there will be no leakage to the outside through the rigid support.

2゛〉 Purpose of the present invention Therefore, the present invention supports the rod-shaped elastic body corresponding to the stator of these devices in a method with low contact loss, thereby converting the vibration energy of the stator to the size of the rotor with high efficiency. The purpose is to provide a high-performance motor device by transmitting the information to the mover.

<3> Regarding the relationship between the natural frequency of bending and torsion of an elastic body and the oscillation Dlh number of a traveling wave of a rod-shaped elastic body, Figure 1 (A) shows a traveling wave caused by bending vibration, -
When a part of the rod-shaped elastic body 1 at C is supported at a point A on the neutral axis B, the point A is vibrating in a direction perpendicular to the neutral axis, and at the same time the point A is vibrating at right angles to the neutral axis. It produces a rotational vibration. Therefore, if one end of the elastic body 2 is fixed at point A and the other end is fixedly supported as shown in Fig. 1 (B) as a cross-sectional view of the rod-shaped elastic body, the elastic body 2 will cause bending vibration and torsional vibration. Become.

In order not to affect the vibration system of the rod-shaped elastic body, elastic body 2
The natural frequencies of bending and torsion are equal to the frequency of the traveling wave of the rod-shaped elastic body 1.1. It is necessary to

Therefore, if we take a round bar as an example of the elastic body 2, then (11
, (It turns out that it is sufficient to find the diameter and length of a round bar that satisfies the formula 2j, and fix one end to the motor's loop 1.

<4>> Regarding the relationship between the natural frequencies of bending and torsion of the spring and the frequency of the traveling wave of the ring-shaped elastic body. Figure 2 shows the neutral shaft portion of the ring-shaped elastic body 1a, which is the stator of a rotary surface wave motor. is supported by a plurality of suits 1 and 2a, and the end of the spring 2a is shown fixed to the motor frame 3.

The natural frequency of bending and torsion of the spring 2a is set equal to the number of traveling waves of the ring-shaped elastic body 1a (7.4).
It is also a 4-digit rotor.

(5> Regarding support by springs, FIG. 3 shows a case in which both ends of a rod νζ elastic body 1b, which is a stator of a linear motor, are supported by springs 2a.

One end of the spring 2a is fixedly supported by the motor frame 3, and the natural frequency due to its bending vibration is made equal to the number of vibrations of the rod-shaped elastic body 1b. (There is no point in saying that it is okay to form 7 in one piece.

<6> Supporting method using a sliding member Figure 4 shows an example of a supporting method using a sliding member 6. In this example, a rod-shaped elastic body corresponding to a stator vibrates with transverse waves such as longitudinal waves. This shows Equation I for a two-dimensional plane.

Therefore, it can be supported by a sliding member that is movable in the vibration direction.

Of course, the feature of this method of support using a sliding member is that whereas the method of supporting using an elastic body requires a certain shape due to natural vibration, the sliding member does not vibrate and can have any shape.

<7) -++ Regarding the support method using an acoustic insulator, Fig. 5 shows an example in which an acoustic insulator 5 such as felt or sponge is glued 17 to a ring-shaped elastic body 1a that is a stator, and is fixedly supported on an E-tar frame. When an elastic wave is incident through the boundary surface of a general medium v'C2-), if there is a large difference in the characteristic acoustic impedance of each medium, the incident wave r, eyes: 1, and mostly reflected 1. When the I-sized transmitted wave V becomes close to zero, the acoustic impedance of elastic bodies such as metals is very high.On the other hand, tools, sponges, etc. It was found that these charges were small enough to provide sufficient acoustic insulation.

<8> Effects of the present invention As explained in detail above, the present invention supports a rod-shaped elastic body corresponding to a fixed element without damaging its vibration, thereby transmitting motive power to a rotor-straddling movable element with high efficiency. It can be said that this is an extremely useful invention that has the effect of making transmission 1~ a higher performance device.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. FIG. 1 (A) is an explanatory diagram of a rod-shaped elastic body, and FIG. FIG. 2 i1 is an explanatory diagram showing the relationship between the elastic bodies 2 and FIG. Fig. 4 is an explanatory diagram of a rod-shaped elastic body supported by a support member, and Fig. 5 is an explanatory diagram of a rotary motor supported by an acoustic insulator. 1 Rod-shaped elastic body 5 Acoustic insulator No. Figure 1 (A) (B) Figure 2 2'a ゝ3 Figure 3] Figure 4 Figure 5 771L/ Procedural amendment (spontaneous) 1971, No. 1, June 1999, Mr. Commissioner of the Patent Office, 1. Indication of the case Japanese Patent Application No. 58-84802 2 Title of the invention Stator support of a surface wave motor 3, person making the amendment Relationship to the case Address of the patent applicant 2-1-8 Kasuya, Setagaya-ku, Tokyo (Specification 11) Column 5 of the Detailed Description of the Invention of the Book, Contents of the Amendment (1) As per the attached sheet (1) ``Surface wave motor...
From J to line 10 of the same page, [...Nana lx, J is translated as "A traveling wave is generated due to bending vibration in the rod-shaped elastic body corresponding to the stator of a surface wave motor, and the stationary 1~ Therefore, the stator is supported by springs or acoustic insulators, but it must be supported in a way that does not apply forces that would damage the vibration system of the rod-shaped elastic body. In terms of efficiency, it is also necessary to take into account that the liquid does not leak to the outside through the support.'' 2.

Claims (1)

[Scope of Claims] 1. A stator support for a surface wave motor, characterized in that the elastic body is supported by an elastic body having bending vibration and/or torsional vibration of a natural frequency. 2. A stator support for a surface wave motor according to item 1 of the scope claimed in Patent U, characterized in that an end of the rod-shaped elastic body is supported by an elastic body having a bending vibration of a natural frequency. 3. A stator support for a surface wave motor, characterized in that a rod-shaped elastic body is supported by a sliding body that is movable in parallel to the vibration direction of the rod-shaped elastic body. 4. A stator support for a surface wave motor, characterized in that a rod-shaped elastic body is supported by an acoustic insulator.