SU873271A1 - Tape drive vibration motor - Google Patents

Description

(54) VIBRATOR MOTOR BENDING MECHANISM

I

The invention relates to instrumentation, in particular to the driving mechanisms of magnetic recording apparatus.

A vibromotor is known, comprising a housing, a rotor located therein in bearing supports, a piezoelectric vibrator made in the form of two flat piezoceramic elements mounted at an angle to each other, the ends of which are rigidly connected; one shoe, a high-frequency power supply unit and a switch Cl3 .

This vibration motor has an insufficient efficiency, as well as a low stability of the rotor speed.

Also known is a vibration motor of a tape drive mechanism, comprising a housing that is rotatably mounted therein; a rotor, and a piezoelectric transducer attached to the end of a stepped concentrator of longitudinal vibrations, driven

a part of which is made of inclined rods symmetrically arranged around the circumference 2}

This vibration motor has a high value of efficiency and speed stability. However, the collision of the ends of the inclined hub rods with the rotor surface leads to wear of the contacting surfaces, which reduces its

10 durability. In addition to i, the design of the vibromotor eliminates the possibility of reversing the rotor damage.

The purpose of the invention is to increase the durability and. providing reversirovani vani vibrider.

Claims (2)

This goal is achieved by the fact that the vibromotor is provided with a connecting element in contact with the working surface of the rotor, made of a friction material that holds the end portions of two inclined rods, and the piezoelectric transducer is made of two piezoceramic vibrators mounted symmetrically on the end surface of the concentrator, the possibility of exciting each of said inclined rods to the HOCTHt section. It is preferable to perform a concentrator with a longitudinal groove in its the base between the inclined wall, On the 1st | one is depicted one of the variants of the design of the vibromotor-motor. The vibration motor includes a housing 1 mounted inside it rotatably with a rotor 2, a stepped concentrator of longitudinal vibrations, 3 with a drive part made in the form of two inclined rods 4 and 5, the ends of which are fastened by means of a connecting element 6 made of friction material and contacting with the working the surface of the rotor 2. To the end surface of the concentrator 3 through the plate spring 7 are attached by means of bolts 8 two piezo ceramic vibrators 9 and 10, equipped with passive lining 1 1. Plate spring 7 is fastened with bolts 12 on housing I. Piezoceramic vibrators 9 and 10 through switch 13 connect to power supply 14. When switch 13 is set to, for example, 1, high-frequency voltage from power supply 14 p is given to piezoceramic a vibrator which excites the drive part 4, the end of which moves the connecting element 6 and the drive part 5 tangentially to the cylindrical surface of the rotor 2. At the same time, a reverse piezoelectric effect occurs in the other piezoceramic vibrator 10, i.e. An electric voltage is formed at the next stage, which at the next moment causes the vibrator 10 to oscillate, but somewhat out of phase. The end of the drive part 5 also acts on the connecting element $, as a result of which the element moves along an elliptical trajectory, jointly rotating the rotor 2. When the switch 13 is set to the P position, the power from the block 14 is applied to the piezoceramic vibrator 4 10. an oscillatory process similar to that described occurs, the trajectory of the connecting element remains elliptical, however, its direction of movement changes to the opposite, which leads to a change in the direction of rotation The rotor 2. The implementation of the inventive invention provides for the reliable operation of the drive unit, the tape drive mechanism, thereby improving the economic performance of magnetic recording apparatus with vibrating motors. . Claim 1. Vibromotor of a tape-forming mechanism, comprising a body mounted thereto with rotation of a rotor, and a piezoelectric transducer attached to the end of a stepped longitudinal oscillation concentrator, the drive part of which is symmetrically located around the circumference of the rod), characterized by that, in order to increase durability and to provide reversing of the vibromotor, it is provided with a connecting element in contact with the working surface of the rotor ohm made of friction material, .skrepl yuschim torpevye portions of the two inclined rods, and a piezoelectric transducer formed of two piezoelectric vibrators fixed symmetrically on the end surface of the hub, with the drive of each of said inclined rods separately. 2. Engine rotor under item 1, from-. In order to reduce the parasitic effect of one piezoceramic vibrator on another, a longitudinal groove is made at the base of the concentrator between the inclined rods. Sources of information taken into account in the examination 1. The author's certificate of the USSR 681479, cl. H 01 L 41/10, H 02 N 11/00, 04/18/78. 2. USSR author's certificate No. 532947, cl. H 02 N 11/00, 11.08.75 (prototype). g h rW / r. g, J