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Rod progressive wave type ultrasonic electric machine

An ultrasonic motor, traveling wave technology, applied in the direction of generators/motors, electrical components, piezoelectric effect/electrostrictive or magnetostrictive motors, etc., can solve problems such as small torque, complex structure, and limited application range , to achieve the effect of simple structure, small volume and large torque-to-volume ratio

Inactive Publication Date: 2004-03-03
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

For example, the rod-type traveling-wave ultrasonic motor produced in Japan basically has the above advantages, but this motor adopts gear transmission mode, the structure is more complicated, the torque is small, and the application range is limited.

Method used

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  • Rod progressive wave type ultrasonic electric machine
  • Rod progressive wave type ultrasonic electric machine
  • Rod progressive wave type ultrasonic electric machine

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Experimental program
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Embodiment Construction

[0011] The invention is a novel ultrasonic motor developed based on the use of piezoelectric ceramic sheets to excite the first-order bending vibration of the Langevin vibrator. It is mainly composed of stator assembly, rotor assembly and output shaft. Fig. 1 is the specific structure schematic diagram of the present invention, as can be seen from the figure, the stator of motor is made of piezoelectric ceramic sheet group 8 (5 pieces in total) and electrode sheet group 7 (3 pieces in total) by lower counterweight block 4 and upper counterweight block 9 ) and 2 pieces of grounding piece group 6 (2 pieces in total), which are compressed by the screw on the lower weight 4 to form a Langevin vibrator. The lower counterweight 4 of the stator has an outer ring boss, and six threaded holes are arranged on the boss, in order to fix the protective cover (not shown in the structure diagram) and install the motor. There is a bearing hole in the lower counterweight 4, and the embedded r...

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Abstract

The stator assembly includes lower clump weight , upper clump weight, piezoelectric ceramic pieces and earthing strips assembled by screw. The rotor assembly includes spring pocket, spring, pin, axis and rotor. Pre-stressing between stator and rotor can be obtained and adjusted by axis and pressure spring. When AC voltage in supersound region is applied to the motor, the particles on the contact surface between upper clump weight and rotor generate elliptic motion. The pre-stressing between stator and rotor generates friction force, which push rotor rotation along surface of stator. The rotor drives rotor assembly to rotate, and power is output through axis.

Description

Technical field: [0001] The rod type traveling wave ultrasonic motor of the invention belongs to the ultrasonic motor in the field of micro motors. Background technique: [0002] Ultrasonic motor is a new type of micro motor using the inverse piezoelectric effect of piezoelectric ceramics and ultrasonic vibration. Among them, the rod type traveling wave ultrasonic motor belongs to a kind of traveling wave ultrasonic motor. This kind of motor, in addition to the advantages of compact structure, quiet operation, large torque volume ratio, easy positioning and speed control of traveling wave ultrasonic motors, also has the advantages of simple structure, low cost, high efficiency, The advantages related to the adhesion problem of ceramic sheets are easy to realize the miniaturization, miniaturization and industrialization of ultrasonic motors. For example, the rod-type traveling-wave ultrasonic motor produced in Japan basically has the above advantages, but this motor adopts ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/12H02N2/16
Inventor 赵淳生马相林
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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