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High-precision thin-wall hollow type travelling wave ultrasonic motor

An ultrasonic motor, high-precision technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problems of small size of the hollow part of the motor and low rotation accuracy of the motor , to reduce stress concentration, eliminate clearance and increase drive accuracy

Active Publication Date: 2018-03-06
NINGBO UNIV
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Problems solved by technology

[0004] The invention provides a high-precision thin-walled hollow traveling wave ultrasonic motor, in order to solve the problem that the size of the hollow part of the entire motor is small due to the large radial installation size of the stator, and the rotation accuracy of the motor is not good due to the saving of the use of bearings. high problem

Method used

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  • High-precision thin-wall hollow type travelling wave ultrasonic motor
  • High-precision thin-wall hollow type travelling wave ultrasonic motor
  • High-precision thin-wall hollow type travelling wave ultrasonic motor

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Embodiment Construction

[0015] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] see Figure 1-Figure 3 Explain that a high-precision thin-walled hollow traveling wave ultrasonic motor includes a hollow shaft 1, a casing 2, a rotor 5, a stator 7 and a base 9; the rotor 5 is mounted on the hollow shaft 1, the casing 2 is mounted on the base 9, and the rotor The friction plate 6 in contact with the stator 7 is arranged on the end surface of the rim of the 5, and the piezoelectric ceramic sheet 8 is laid on the end surface adjacent to the base 9 of the stator 7, and the stator 7 is a folded structure with grooves on its outer surface along the circumferential direction The stator 7 is installed in the positioning installation groove on the base 9 , the hollow shaft 1 is arranged on the shell 2 and the base 9 , and the hollow shaft 1 can rotate relative to the shell 2 and the base 9 .

[0017] The stat...

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Abstract

The invention provides a high-precision thin-wall hollow type travelling wave ultrasonic motor, relates to an ultrasonic motor, and solves the problems of small dimension occupied by a hollow portionof the whole motor due to large radial installation dimension of a stator and low revolution precision of the motor due to saved usage of bearings. The motor comprises a hollow shaft, a housing, a rotor, a stator and a base, the rotor is arranged on the hollow shaft, the housing is arranged on the base in a covering manner, a flange end surface of the rotor is provided with a friction plate contacted with the stator, an end surface of the stator, adjacent to the base, is laid with piezoelectric ceramics, the stator is a folding structure with grooves arranged along the circumferential direction of an outside surface thereof, the stator is arranged in a positioning installation groove of the base, the hollow shaft is arranged on the housing and the base, and the hollow shaft can rotate relative to the housing and the base. The high-precision thin-wall hollow type travelling wave ultrasonic motor is regarded as a driver.

Description

technical field [0001] The invention relates to an ultrasonic motor, in particular to a high-precision thin-walled hollow traveling wave ultrasonic motor, which belongs to the technical field of piezoelectric drive. Background technique [0002] Ultrasonic motor is a new type of drive that uses the inverse piezoelectric effect of piezoelectric materials to convert electrical energy into mechanical energy. Its stator is usually composed of piezoelectric ceramics and metal elastomers. Stator elasticity is achieved by applying an AC voltage of ultrasonic frequency to piezoelectric ceramics. The excitation of mechanical vibration of the same frequency in the body, and then the particles in the driving area of ​​the stator form a motion trajectory with a driving effect, and the output of the macroscopic motion of the rotor is realized through the friction coupling between the stator and the rotor. The hollow type ultrasonic motor has a hollow structure inside, which can place opt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/12H02N2/16
CPCH02N2/12H02N2/16
Inventor 李锦棒陈鹏飞崔玉国于爱兵曾帅帅
Owner NINGBO UNIV
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