Protrudent toothed belt groove longitudinal bending mode conversion dual-rotor ultrasonic motor

An ultrasonic motor and mode conversion technology, which is applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve problems such as complex processing technology, and save bearings, The effect of high torque

Inactive Publication Date: 2009-11-04
TSINGHUA UNIV
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Problems solved by technology

This design effectively reduces noise and improves stability, but t

Method used

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  • Protrudent toothed belt groove longitudinal bending mode conversion dual-rotor ultrasonic motor
  • Protrudent toothed belt groove longitudinal bending mode conversion dual-rotor ultrasonic motor
  • Protrudent toothed belt groove longitudinal bending mode conversion dual-rotor ultrasonic motor

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Embodiment Construction

[0015] The longitudinal-bending mode conversion double-rotor ultrasonic motor with protruding teeth and grooves proposed by the present invention has a structure such as figure 2 Said, including the first rotor 3 , the second rotor 3 , the stator, the rotating shaft 4 , the chassis 6 and the solenoid 9 . The first rotor 3 , the solenoid tube 9 and the second rotor 3 are sequentially fitted on the rotating shaft 4 from top to bottom and then placed on the chassis 6 . The stator is screwed on the screw tube 9 through the stator cap, and the stator is composed of the first stator cap 2, the first piezoelectric sheet 1, the second piezoelectric sheet 1 and the second stator cap 2 which are stacked in sequence. The nut 5 applies a preload to the first rotor 3 and the second rotor 3 through the spring 7 .

[0016] In the above ultrasonic motor, the structures of the first stator cap and the second stator cap are frustum-shaped, such as image 3 As shown in (a), in one embodiment ...

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Abstract

The invention relates to a protrudent toothed belt groove longitudinal and bending mode conversion dual-rotor ultrasonic motor, which belongs to the technical field of design of ultrasonic micro-motors. The dual-rotor ultrasonic motor comprises a first rotor, a second rotor, a stator, a rotary shaft, a chassis and a spiral tube. The first rotor, the spiral tube and the second rotor are sequentially sleeved on the rotary shaft from top to bottom and then arranged on the chassis. The stator is screwed on the spiral tube, and the stator is composed of a first stator cap, a first piezoelectric plate, a second piezoelectric plate and a second stator cap by sequential overlapping. A nut imposes pre-pressure on the first rotor and the second rotor through a spring. The ultrasonic motor adopts the dual-rotor structure, eliminates a bearing, has dual-end output and can rotate in single direction; furthermore, the torque is great, and the output torque can be more than 30 percent. The ultrasonic motor can be widely applied in industrial, defense and medical equipment as a driving source. If the high and low temperature resistant piezoelectric plates are used in the ultrasonic motor, then the ultrasonic motor can be applied in high and low temperature extreme environments.

Description

technical field [0001] The invention relates to a longitudinal bending mode conversion double-rotor ultrasonic motor with protruding teeth and grooves, and belongs to the technical field of ultrasonic micro-motor design. Background technique [0002] The mode conversion motor is an ultrasonic motor for special requirements such as large torque and single rotation direction. It relies on the mode conversion mechanism to generate vibration modes that can drive the rotor to rotate. In general, the vibration as the driving force source is completed by a vertical vibrator with a high electromechanical conversion capability, so this type of motor has a high conversion efficiency and is suitable for high power output. The main parts of this kind of motor are the conversion mechanism of the vibration mode of the stator cap and the toggle mechanism of the stator to the rotor. Generally, the mode conversion motor is driven by a single electrical signal. [0003] In 1985, Akio Kumada...

Claims

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Application Information

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IPC IPC(8): H02N2/10H02N2/12
Inventor 周铁英谢天束逸陈宇傅德永
Owner TSINGHUA UNIV
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