CN214591207U - Micro-miniature ultrasonic motor based on longitudinal vibration mode - Google Patents
Micro-miniature ultrasonic motor based on longitudinal vibration mode Download PDFInfo
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- CN214591207U CN214591207U CN202121196913.7U CN202121196913U CN214591207U CN 214591207 U CN214591207 U CN 214591207U CN 202121196913 U CN202121196913 U CN 202121196913U CN 214591207 U CN214591207 U CN 214591207U
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Abstract
The utility model relates to a microminiature ultrasonic motor based on longitudinal vibration mode, which comprises a base, a stator and a rotor; the stator is fixedly connected to the base, the rotor is clamped on an elastic body in the stator in a self-adaptive pre-tightening mode, and two groups of piezoelectric sheets are bonded on the elastic body; the micro-ultrasonic motor uses the two groups of piezoelectric sheets as driving sources, and is respectively used for exciting the longitudinal vibration of a longitudinal vibration part a and a longitudinal vibration part b in the elastic body and synthesizing the longitudinal vibration into sawtooth waves in two directions so as to drive the rotor to move linearly. Has the advantages that: the micro-miniature ultrasonic motor has the characteristics of simple structure, small size, low cost, convenience in processing, easiness in integration and the like, can realize large-scale production and commercial application, and has higher practical value in the aspects of precision driving and positioning in occasions with limited application space.
Description
Technical Field
The utility model relates to a little special motor technical field, in particular to microminiature ultrasonic motor based on longitudinal vibration mode, this ultrasonic motor utilize the supersound to arouse the principle of the synthetic sawtooth wave of elastomer resonance, have simple structure, small in size, characteristics fast are applicable to the accurate positioning and the drive of object in the small space.
Background
With the development of science and technology, high-precision technical fields such as aerospace engineering, biomedical engineering, ultra-precision machining and micro-electro-mechanical systems and the like have put forward requirements on a driving device for high precision, small volume, large stroke and the like, and a piezoelectric driver has the advantages of simple structure, high precision, high response speed, no electromagnetic interference and the like, so that the piezoelectric driver is widely concerned. Because the displacement stroke output by a single piezoelectric element is very limited, researchers put forward different stepping driving principles such as ultrasound, stick-slip, impact, inchworm and the like based on the idea of stepping accumulation, and develop corresponding piezoelectric drivers. Among them, the ultrasonic motor has the advantages of small noise, fast response, large output force and the like, and has higher practicability. The problem that the size of the existing linear ultrasonic motor is not compact enough still exists, and the positioning requirement in an extremely small space size cannot be met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a microminiature ultrasonic motor based on indulge mode of shaking, it utilizes the piezoelectric patches as the power supply, and structural design is nimble, can realize the structure realization of super small-size. The ultrasonic resonance saw-tooth wave sensor is driven by adopting a mode of synthesizing the ultrasonic resonance saw-tooth wave, has the characteristics of simple and compact structure, high speed and high compatibility, and can realize the precise positioning of a target object in a very small application space.
The above object of the utility model is realized through following technical scheme:
a microminiature ultrasonic motor based on longitudinal vibration mode is characterized in that: the device comprises a base 1, a stator 2 and a rotor 3; the stator 2 is fixedly connected to the base 1, and the mover 3 is clamped on the elastic bodies 2-3 in the stator 2 in a self-adaptive pre-tightening mode.
The stator 2 consists of a piezoelectric sheet a2-1-1, a piezoelectric sheet b2-1-2, a piezoelectric sheet c2-2-1 and a piezoelectric sheet d 2-2-2; the piezoelectric sheet a2-1-1 and the piezoelectric sheet b2-1-2 are respectively stuck on the upper surface and the lower surface of the longitudinal vibration part a2-3-2 of the elastic body 2-3; the piezoelectric sheet c2-2-1 and the piezoelectric sheet d2-2-2 are respectively stuck on the upper surface and the lower surface of the longitudinal vibration part b2-3-3 of the elastic body 2-3;
the elastic body 2-3 consists of a fixed end 2-3-1, a longitudinal vibration part a2-3-2, a longitudinal vibration part b2-3-3 and a transmission rod 2-3-4.
The rotor 3 is composed of an opening 3-1, a circular arm 3-2, a straight beam 3-3 and a hollow body 3-4. Wherein the opening 3-1 is used for making the circular ring arm 3-2 have certain elasticity, and can be clamped on the flexible hinge mechanism 2-3 in the stator 2 in a self-adaptive pre-tightening way, and the straight beam 3-3 plays a role in guiding and can also be used for placing other driven objects on the upper surface.
The driving method of the microminiature ultrasonic motor based on the longitudinal vibration mode mainly comprises the following steps:
a) a sinusoidal electric signal of U-Asin (4 pi ft + phi 1) is applied to the piezoelectric sheet a2-1-1 and the piezoelectric sheet b2-1-2 of the stator 2, a longitudinal vibration mode of a longitudinal vibration part a2-3-2 is excited, and sinusoidal mechanical vibration along the x direction is generated; simultaneously, a sinusoidal electric signal of U ═ Bsin (2 pi ft + phi 2) is applied to the piezoelectric sheet c2-2-1 and the piezoelectric sheet d2-2-2, a longitudinal vibration mode of a longitudinal vibration part b2-3-3 is excited, and sinusoidal mechanical vibration is generated; the mechanical vibration of the longitudinal vibration part a2-3-2 and the longitudinal vibration part b2-3-3 are coupled, so that sawtooth-like wave mechanical vibration along the x direction is generated on the transmission rod 2-3-4, and the transmission rod 2-3-4 drives the rotor 3 to generate linear stepping motion along the x direction according to the stick-slip driving principle;
b) by controlling the amplitude A, B and the phases phi 1 and phi 2 of the excitation signals of the piezoelectric sheet a2-1-1, the piezoelectric sheet b2-1-2, the piezoelectric sheet c2-2-1 and the piezoelectric sheet d2-2-2, the adjustment of the movement speed and the forward and reverse directions of the movement can be realized.
The beneficial effects of the utility model reside in that: through the utility model provides a pair of microminiature ultrasonic motor based on longitudinal vibration mode can realize having characteristics such as simple structure, size are small, fast, the precision is high, easily processing to the precision drive and the location of target object in small application space, has the potentiality of large-scale production and commercial application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate example embodiments of the invention and together with the description serve to explain the invention without limitation.
Fig. 1 is a schematic view of the overall structure of a micro-miniature ultrasonic motor based on longitudinal vibration mode according to the present invention;
fig. 2 is a schematic structural view of the stator of the present invention;
FIG. 3 is a schematic view of the structure of the elastomer of the present invention;
fig. 4 is a schematic structural view of the mover of the present invention;
in the figure: 1. a base; 2. a stator; 2-1-1, piezoelectric sheet a; 2-1-2, piezoelectric sheet b; 2-2-1, piezoelectric sheet c; 2-2-2, piezoelectric sheet d; 2-3, an elastomer; 2-3-1, fixed end; 2-3-2, longitudinal vibration part a; 2-3-3, longitudinal vibration part b; 2-3-4, a transmission rod; 3. a mover; 3-1, opening; 3-2, a circular ring arm; 3-3, straight beam; 3-4, hollow body.
Detailed Description
The details of the present invention and its embodiments are further described below with reference to the accompanying drawings.
Referring to fig. 1 to 4, a micro-miniature ultrasonic motor based on longitudinal vibration mode is characterized in that: the device comprises a base 1, a stator 2 and a rotor 3; the stator 2 is fixedly connected to the base 1, and the mover 3 is clamped on the elastic bodies 2-3 in the stator 2 in a self-adaptive pre-tightening mode.
The stator 2 consists of a piezoelectric sheet a2-1-1, a piezoelectric sheet b2-1-2, a piezoelectric sheet c2-2-1 and a piezoelectric sheet d 2-2-2; the piezoelectric sheet a2-1-1 and the piezoelectric sheet b2-1-2 are respectively stuck on the upper surface and the lower surface of the longitudinal vibration part a2-3-2 of the elastic body 2-3; the piezoelectric sheet c2-2-1 and the piezoelectric sheet d2-2-2 are respectively stuck on the upper surface and the lower surface of the longitudinal vibration part b2-3-3 of the elastic body 2-3;
the elastic body 2-3 consists of a fixed end 2-3-1, a longitudinal vibration part a2-3-2, a longitudinal vibration part b2-3-3 and a transmission rod 2-3-4.
The rotor 3 is composed of an opening 3-1, a circular arm 3-2, a straight beam 3-3 and a hollow body 3-4. Wherein the opening 3-1 is used for making the circular ring arm 3-2 have certain elasticity, and can be clamped on the flexible hinge mechanism 2-3 in the stator 2 in a self-adaptive pre-tightening way, and the straight beam 3-3 plays a role in guiding and can also be used for placing other driven objects on the upper surface.
The driving method of the microminiature ultrasonic motor based on the longitudinal vibration mode comprises the following steps:
a) a sinusoidal electric signal of U-Asin (4 pi ft + phi 1) is applied to the piezoelectric sheet a2-1-1 and the piezoelectric sheet b2-1-2 of the stator 2, a longitudinal vibration mode of a longitudinal vibration part a2-3-2 is excited, and sinusoidal mechanical vibration along the x direction is generated; simultaneously, a sinusoidal electric signal of U ═ Bsin (2 pi ft + phi 2) is applied to the piezoelectric sheet c2-2-1 and the piezoelectric sheet d2-2-2, a longitudinal vibration mode of a longitudinal vibration part b2-3-3 is excited, and sinusoidal mechanical vibration is generated; the mechanical vibration of the longitudinal vibration part a2-3-2 and the longitudinal vibration part b2-3-3 are coupled, so that sawtooth-like wave mechanical vibration along the x direction is generated on the transmission rod 2-3-4, and the transmission rod 2-3-4 drives the rotor 3 to generate linear stepping motion along the x direction according to the stick-slip driving principle;
b) by controlling the amplitude A, B and the phases phi 1 and phi 2 of the excitation signals of the piezoelectric sheet a2-1-1, the piezoelectric sheet b2-1-2, the piezoelectric sheet c2-2-1 and the piezoelectric sheet d2-2-2, the adjustment of the movement speed and the forward and reverse directions of the movement can be realized.
The above description is only a preferred example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made to the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A microminiature ultrasonic motor based on longitudinal vibration mode is characterized in that: the device comprises a base (1), a stator (2) and a rotor (3); the stator (2) is fixedly connected to the base (1), and the rotor (3) is clamped on the elastic body (2-3) in the stator (2) in a self-adaptive pre-tightening mode.
2. The ultrasonic micro-motor based on longitudinal vibration mode as claimed in claim 1, wherein: the stator (2) is composed of a piezoelectric sheet a (2-1-1), a piezoelectric sheet b (2-1-2), a piezoelectric sheet c (2-2-1) and a piezoelectric sheet d (2-2-2); the piezoelectric sheet a (2-1-1) and the piezoelectric sheet b (2-1-2) are respectively stuck on the upper surface and the lower surface of the longitudinal vibration part a (2-3-2) of the elastic body (2-3); the piezoelectric sheet c (2-2-1) and the piezoelectric sheet d (2-2-2) are respectively stuck on the upper surface and the lower surface of the longitudinal vibration part b (2-3-3) of the elastic body (2-3).
3. The ultrasonic micro-motor based on longitudinal vibration mode as claimed in claim 1, wherein: the elastic body (2-3) consists of a fixed end (2-3-1), a longitudinal vibration part a (2-3-2), a longitudinal vibration part b (2-3-3) and a transmission rod (2-3-4).
4. The ultrasonic micro-motor based on longitudinal vibration mode as claimed in claim 1, wherein: the rotor (3) is composed of an opening (3-1), a circular ring arm (3-2), a straight beam (3-3) and a hollow body (3-4).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113517825A (en) * | 2021-05-31 | 2021-10-19 | 吉林大学 | Micro-miniature ultrasonic motor based on longitudinal vibration mode and driving method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113517825A (en) * | 2021-05-31 | 2021-10-19 | 吉林大学 | Micro-miniature ultrasonic motor based on longitudinal vibration mode and driving method thereof |
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