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Barrel structure rotary linear ultrasonic motor excited by piezoelectric driver and its excitation method

A technology of linear ultrasonic motor and piezoelectric driver, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve problems such as low output power and small output force of motors , to achieve the effect of high output power, large output force and wide application prospects

Active Publication Date: 2017-02-01
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned rotary linear ultrasonic motors are different in the configuration of the vibrator or the driving excitation mode, they have one thing in common that the piezoelectric excitation elements used to excite vibration in the vibrator all adopt a single-layer sheet-like piezoelectric element. The electric sheet is used as the excitation source, resulting in a small output force of the motor (generally not exceeding 10 N), and a low output power (generally not exceeding 20mW)

Method used

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  • Barrel structure rotary linear ultrasonic motor excited by piezoelectric driver and its excitation method
  • Barrel structure rotary linear ultrasonic motor excited by piezoelectric driver and its excitation method
  • Barrel structure rotary linear ultrasonic motor excited by piezoelectric driver and its excitation method

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specific Embodiment approach 1

[0023] Specific implementation mode one: combine figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 with Figure 15 This embodiment will be described. This embodiment provides an embodiment of a cylindrical structure rotating linear ultrasonic motor excited by a piezoelectric driver in a single-wavelength excitation mode and its excitation method. The piezoelectric driver in a single-wavelength excitation mode The ultrasonic motor is mainly composed of a motor support 1, a piezoelectric driver 2, an excited body nut 3, an output shaft 4 and a pre-tightening screw 5.

[0024] The motor support 1 is a cylindrical structure with fixed ends, and 4 planes are evenly distributed on its outer circumference for cooperating with the pre-tightening screws 5, specifically the first outer plane 1-1 of the motor support, the motor The second outer plane 1-2 of the support, the third outer plane 1-3 of the motor support and the fourth outer plane 1-4 of the motor sup...

specific Embodiment approach 2

[0027] Specific implementation mode two: combination Figure 7 , Figure 8 , Figure 9 , Figure 10 with Figure 15 This embodiment will be described. This embodiment provides an embodiment of a cylinder-structure rotary linear ultrasonic motor excited by a piezoelectric driver in a two-wavelength excitation mode and an excitation method thereof. Its components and connections are the same as those in Embodiment 1, the difference lies in the excitation mode of the piezoelectric driver 2 to the excited nut 3 is different.

[0028] The motor support 1 is a cylindrical structure with fixed ends, and 8 planes are evenly distributed on its outer circumference for cooperating with the pre-tightening screws 5, specifically the first outer plane 1-1 of the motor support, the motor The second outer plane of the support 1-2, the third outer plane of the motor support 1-3, the fourth outer plane of the motor support 1-4, the fifth outer plane of the motor support 1-5, the sixth oute...

specific Embodiment approach 3

[0032] Specific implementation mode three: combination Figure 11 , Figure 12 , Figure 13 , Figure 14 with Figure 15 This embodiment will be described. This embodiment provides an embodiment of a cylinder-structure rotary linear ultrasonic motor excited by a piezoelectric driver in a three-wavelength excitation mode and an excitation method thereof. Its components and connections are the same as those in Embodiment 1 and Embodiment 2, except that the piezoelectric driver 2 excites the excited nut 3 in different modes.

[0033] The motor support 1 is a cylindrical structure with fixed ends, and 12 planes are evenly distributed on its outer circumference for cooperating with the pre-tightening screws 5, specifically the first outer plane 1-1 of the motor support, the motor The second outer plane of the support 1-2, the third outer plane of the motor support 1-3, the fourth outer plane of the motor support 1-4, the fifth outer plane of the motor support 1-5, the sixth ou...

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Abstract

The invention discloses a cylindrical structure rotary linear ultrasonic motor of excitation of a piezoelectric actuator and an excitation method of the cylindrical structure rotary linear ultrasonic motor. The problems that an existing rotary linear ultrasonic motor is small in output force, low in output power and the like are solved. The cylindrical structure rotary linear ultrasonic motor comprises a motor support, the piezoelectric actuator, an excited body nut, an output shaft and a pre-tightening screw. The motor support is of a cylindrical structure with the ends fixed. The excited body nut is an elastic nut body with an external plane and internal threads. The output shaft is a rigid body of a threaded shaft structure. A piezoelectric element is arranged in the motor support in a piezoelectric stacking mode and tightened to the external plane of the excited body nut in advance through the pre-tightening screw. The excited body nut and the output shaft are in transmission through a thread pair. Alternating electric signals are exerted on the piezoelectric actuator, a bending vibration mode of the excited body nut is stimulated, driving traveling waves are generated through superposition and coupling, driving force is generated through transmission of the thread pair, and therefore rotary linear output of the output shaft is achieved. The cylindrical structure rotary linear ultrasonic motor has the advantages that the output force is large, the output power is high, and the application prospects in the fields of aerospace and the like are wide.

Description

technical field [0001] The invention relates to a cylinder-structure rotating linear ultrasonic motor excited by a piezoelectric driver and an excitation method thereof, belonging to the technical field of precision driving and positioning. Background technique [0002] Ultrasonic motor (also known as ultrasonic motor) is a kind of ultrasonic vibration that uses the inverse piezoelectric effect of the piezoelectric driver to excite the vibrator (or stator) to generate small-amplitude high-frequency ultrasonic vibration, and realizes mechanical energy output through the frictional coupling between the vibrator and the mover. micro motor. According to the different output forms of movers, ultrasonic motors can be divided into several output types such as linear, rotary and multi-degree-of-freedom. As one of the current output types of ultrasonic motors, the rotary linear ultrasonic motor is mainly driven by a screw pair between the vibrator and the mover, and the output of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/02H02N2/04H02N2/06
Inventor 程廷海何丽鹏王良张邦成高智姜大伟
Owner CHANGCHUN UNIV OF TECH