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Multi-stage parallel double-output-shaft rotary ultrasonic motor

A technology of ultrasonic motor and dual output shafts, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problem of small output torque, short arm, radial dimension Small and other problems, to achieve the effect of large torque output, stable output performance, and improved parallel efficiency

Active Publication Date: 2019-10-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent [CN201210433818.3] proposes a rotating ultrasonic motor driven by multiple parallel V vibrators, but the disadvantage is that the V vibrator contacts act on the mover (that is, the output shaft), and the radial dimension of the shaft It must be very small, which causes the problem of short arm and small output torque

Method used

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  • Multi-stage parallel double-output-shaft rotary ultrasonic motor
  • Multi-stage parallel double-output-shaft rotary ultrasonic motor
  • Multi-stage parallel double-output-shaft rotary ultrasonic motor

Examples

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Effect test

Embodiment 1

[0032] In this embodiment, the N V vibrators can generate driving force simultaneously or not at the same time (four V vibrators in the schematic diagram of the present invention). When the number of V oscillators is an even number, the V oscillators are numbered clockwise or counterclockwise. In the schematic diagram, they are numbered counterclockwise, such as image 3As shown, the two sandwich transducers of each V vibrator are divided into two phases, A and B. As shown in the figure, in this embodiment, the vibrators (711) and (713) are connected to phases A and B with a phase difference of 90°. Simple harmonic excitation signal, (712), (714) oscillator A phase access and (711), (713) oscillator A phase difference of 180 ° simple harmonic excitation signal, (712), (714) The phase B of the vibrator is connected to the simple harmonic excitation signal with a phase difference of 180° from the phase B of the vibrator (711) and (713). It can ensure that the contact of the V v...

Embodiment 2

[0034] In this embodiment, the four V oscillators generate driving force at the same time, and the excitation signal of each V oscillator is completely the same, that is, the same frequency and the same phase. If the phase difference of the two-phase excitation signals of V vibrator A and B is adjusted to -90°, the reverse rotation of the motor can be realized. Such as image 3 The four V vibrators of the rotor shown, (711), (712), (713), (714) vibrators A and B phases are connected to simple harmonic excitation signals with a phase difference of 90°, and the radial force of the rotor is balanced.

Embodiment 3

[0036] In this embodiment, the size of the included angle of the transducer is changed. By changing the angle between the two sandwich transducers of the V vibrator, the contact of the V vibrator can be controlled to form an elliptical motion. When the included angle is less than 90°, the ellipse formed by the V vibrator contact is prolate, such as Figure 8 As shown in (a), (82) is the trajectory of the contact, which is oblong and elliptical. The normal direction of the contact between the contact and the friction layer has a large amplitude, so when the contact contacts the friction layer, a large friction force can be generated , so that the output torque of the motor is large.

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Abstract

The invention discloses a multi-stage parallel double-output-shaft rotary ultrasonic motor, and the motor comprises a base (61) for mounting a V vibrator, a pre-pressure mechanism and an output shaft;a V oscillator (71); a preload bolt (111); a nut (51); a pressure nail (91) which is in contact with the pre-pressure bolt and is pressed; a spring (101); a shaft (11); a bearing (31); an end cap (21); and a housing (41). A friction material layer is arranged in the shell and is a friction layer (81). The motor excites a rear contact to perform elliptical motion through a V-shaped vibrator hand,and generates a driving force through friction with the friction layer. The principle and the structure are simple, and the rotating motor has the advantages of large output torque, good operation stability and the like.

Description

technical field [0001] The invention relates to an ultrasonic motor, in particular to a rotating ultrasonic motor designed by connecting V vibrators in parallel, and belongs to the field of ultrasonic motors. Background technique [0002] Compared with traditional electromagnetic motors, ultrasonic motors do not rely on electromagnetic media to transfer energy, but use the inverse piezoelectric effect of piezoelectric ceramics to convert and couple various stretching vibration modes to amplify the microscopic deformation of materials through resonance and friction. The coupling is converted into the macroscopic motion of the vibrator or the slider, and the motor is not easily disturbed by the electromagnetic field when it is working. At present, most rotary ultrasonic motors have the defect that the output torque is not large. The V-shaped linear ultrasonic motor designed based on the Langevin vibrator has the advantage of large thrust. If the V vibrator is used as the rotor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/12
CPCH02N2/12
Inventor 张彦虎袁项辉周玉华全力
Owner JIANGSU UNIV
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