SU853709A1 - Vibromotor - Google Patents

Description

(54) VIBRATION MOTOR

 1 The deception relates to the field of electric motors and can be used in automation devices and as a universal purpose engine.

A vibratory motor 1J is known, which contains a power unit, a hollow cylindrical rotor and a piezoelectric transducer made in the form of a tetrahedral metal rod, on the planes of which the piezoelectric plates are fixed.

The disadvantage of this vibromotor is that the converter has a relatively large cross section. This does not allow to obtain high oscillation amplitudes of the transducer, which degrades the power and speed characteristics of the motion.

The vibration motor 2 is known, comprising a housing and a hollow rotor installed therein in bearing supports and a piezoelectric transducer associated with it, connected to the power supply unit. A converter made of several piezoceramic plates or rods fastened with side surfaces into one oscillatory system.

The drawbacks of the device are the complexity of the design, as well as the fact that the converter has a large cross section and a relatively high rigidity, which reduces the amplitude of its oscillations, and consequently, degrades the power and speed characteristics.

The aim of the invention is to simplify the design, increase power and stability of rotation.

The goal is achieved by the fact that in a known vibration motor comprising a housing and installed in

15 there is a hollow rotor in bearing supports and a piezoelectric transducer coupled to it, connected to a power supply unit, a piezoelectric transducer is made of a piezoceramic rod, the polarization direction of one half of which is perpendicular to the polarization direction of the other half. Both electrodes are first and second

The 25 halves are divided into two equal parts, which are connected to the high-frequency power unit in antiphase.

FIG. 1 shows converter}

30 in FIG. 2 - the same in section; on

FIG. 3 - section A-A of FIG. 2; on

FIG. 4 - axis movement path

converter

The vibration motor includes a housing 1, a hollow rotor 2 in bearing supports 3, a piezoelectric transducer made in the form of a piezoceramic rod 4, the polarization direction of one half of whose length is oriented perpendicular to the polarization direction of the other half of length. Both electrodes of the first and second halves are divided by wire cut into two equal parts, which are connected to the high-frequency power supply unit 5 in antiphase. The fixed end of the piezoelectric ceramic; rod 4 is attached to the housing 1 through a dielectric holder b with the possibility of adjusting its position. At the movable end of the rod 4, the shoes 7 are fastened, mating with the rotor 2.

The vibrator works as follows.

When the power supply unit 5 is turned on, high-frequency voltage is applied to all parts of the electrodes. Since the electrodes of each half of the rod 4 are divided into two parts and connected to the power supply unit in antiphase, they oscillate to the bend, but since the direction of polarization of one half is perpendicular to the direction of polarization of the other half, the directions of bending oscillations of one half and the second will also be perpendicular, which contributes to the formation of a circular trajectory of oscillation of the movable end of the rod 4. The shoes 7, interacting with the rotor 2, convert these circular vibrations into rotational motion of the rotor 2

The layout of the device is made and researched by the manufacturer.

Studies have shown that when compared to the prototype, the design of the converter is simplified, as well as increased power by 10-15% and rotational stability by 30-40%, since the resulting higher amplitude of oscillation allows for reliable contact between the rotor and bgpmaki.

Claims (2)

1. The patent of Germany No. 1488698, cl. And 02 By 33/00, published. 1965. 2. US patent number 2439499, cl. 171-327, publ. 1948 (prototype) four: LA f (pug. 1 ff yzh 2