CN109104119B - Inertial rotation driver with composite foot support - Google Patents
Inertial rotation driver with composite foot support Download PDFInfo
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- CN109104119B CN109104119B CN201811059634.9A CN201811059634A CN109104119B CN 109104119 B CN109104119 B CN 109104119B CN 201811059634 A CN201811059634 A CN 201811059634A CN 109104119 B CN109104119 B CN 109104119B
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- rotating shaft
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- 239000002131 composite material Substances 0.000 title claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 26
- 230000033001 locomotion Effects 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000026058 directional locomotion Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/10—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
- H02N2/12—Constructional details
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention relates to an inertial rotary drive with a composite foot support, comprising: fixed circumference, central pivot, piezoelectric vibrator, connection circumference and compound foot support, wherein: the fixed circumference is connected with the frame, one end of the piezoelectric vibrator is connected with the central rotating shaft, the other end of the piezoelectric vibrator is connected with the connecting circumference, the composite foot supports are uniformly arranged on the outer annular surface of the connecting circumference, and the composite foot supports are in contact with the fixed circumference. When the piezoelectric vibrator is electrified, the piezoelectric vibrator vibrates back and forth to drive the central rotating shaft to rotate, and when the piezoelectric vibrator rotates in different directions, the high-friction-coefficient material and the low-friction-coefficient material of the composite foot support are in alternate contact with the fixed circumference, so that the magnitude of friction force changes, and further the stepping directional rotation of the central rotating shaft is realized. The driver has the advantages of quick response, high precision, no electromagnetic interference and the like of a common piezoelectric driver, and also has the advantages of simple structure, easy acquisition of driving signals and simple driving principle.
Description
Technical Field
The invention belongs to the field of piezoelectric drive, and particularly relates to an inertial rotation driver with a composite foot support.
Background
The piezoelectric drive is mainly divided into a piezoelectric ultrasonic motor, a clamp type piezoelectric driver, an inertia type piezoelectric driver and a variable friction type piezoelectric driver. The piezoelectric ultrasonic motor is divided into traveling wave driving and standing wave driving; the clamp-on piezoelectric actuator is mainly an inchworm-like piezoelectric actuator, and generally has a complex structure and needs a plurality of groups of piezoelectric vibrators; the inertial piezoelectric driver is mainly divided into an impact type and a stick-slip type, and the driver realizes the directional movement of the driver through an asymmetric driving signal, so that the requirement on a signal generator is high; the variable friction type piezoelectric actuator is mainly classified into a variable material type and a variable positive pressure type according to the friction force changing mode. Therefore, the development of a piezoelectric actuator with a simple structure and easily obtained driving signals is of great significance to the field of piezoelectric driving.
Disclosure of Invention
In order to solve the problem that the structure and the driving signal of the existing piezoelectric driver are complex, an inertial rotation driver with a composite foot support is provided, and the driver consists of a fixed circumference, a central rotating shaft, a piezoelectric vibrator, a connecting circumference and the composite foot support; the fixed circumference is connected with the frame, one end of the piezoelectric vibrator is connected with the central rotating shaft, the other end of the piezoelectric vibrator is connected with the connecting circumference, the composite foot supports are uniformly arranged on the outer annular surface of the connecting circumference, and the composite foot supports are in contact with the fixed circumference; the fixed circumference is a circular ring-shaped component, the central rotating shaft is a cylindrical component and can rotate around the axis of the central rotating shaft, the piezoelectric vibrator is formed by sticking piezoelectric thin sheet materials on a rectangular elastic base body, the connecting circumference is a circular ring-shaped component, and the composite foot support is a cylindrical component formed by compounding two materials with different friction coefficients. The piezoelectric vibrator vibrates back and forth when being electrified so as to drive the central rotating shaft to rotate, and when the piezoelectric vibrator rotates in different directions, the high friction coefficient material and the low friction coefficient material of the composite foot support alternately contact with the fixed circumference, so that the magnitude of friction force changes, and further the stepping directional rotation of the central rotating shaft is realized. The driver has the advantages of quick response, high precision, no electromagnetic interference and the like of a common piezoelectric driver, and also has the advantages of simple structure, easy acquisition of driving signals and simple driving principle.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to an inertial rotation driver with a composite foot support, which comprises a fixed circumference, a central rotating shaft, a piezoelectric vibrator, a connecting circumference and the composite foot support, wherein the fixed circumference is connected with the central rotating shaft; the fixed circumference is a circular ring-shaped component, the central rotating shaft is a cylindrical component and can rotate around the axis of the central rotating shaft, the piezoelectric vibrator is formed by sticking piezoelectric thin sheet materials on a rectangular elastic base body, the connecting circumference is a circular ring-shaped component, and the composite foot support is a cylindrical component formed by compounding a low-friction-coefficient material and a high-friction-coefficient material; the fixed circumference is connected with the frame, one end of the piezoelectric vibrator is connected with the central rotating shaft, the other end of the piezoelectric vibrator is connected with the connecting circumference, the composite foot supports are uniformly arranged on the outer annular surface of the connecting circumference, and the composite foot supports are in contact with the fixed circumference.
When the piezoelectric vibrator works, the piezoelectric vibrator does reciprocating motion under the drive of sine alternating voltage, and because the high-friction-coefficient material and the low-friction-coefficient material of the composite foot support are alternately contacted with the fixed circumference, and the rotating directions are different, the friction force of the fixed circumference on the composite foot support is different, so that the resultant force which is not received when the central rotating shaft is turned is changed, and finally the central rotating shaft realizes directional rotation. The working principle of the driver is schematically shown in fig. 3: as shown in fig. 3 (a), when the piezoelectric vibrator is not energized, the actuator is in a stationary state; as shown in fig. 3 (b), when the driving voltage gradually increases from the minimum to the maximum, the piezoelectric vibrator moves clockwise, at this time, the low-friction-coefficient material of the composite foot support is in contact with the fixed circumference, the friction force generated by the contact is small, and the central shaft rotates clockwise by an angle of w1 under the combined action of the driving force of the piezoelectric vibrator and the friction force; as shown in fig. 3 (c), when the driving voltage gradually decreases from the maximum to the minimum, the piezoelectric vibrator performs counterclockwise motion, at this time, the high friction coefficient material of the composite foot support is in contact with the fixed circumference, the friction force generated by the contact is large, and the central shaft rotates counterclockwise by an angle of w2 under the combined action of the driving force of the piezoelectric vibrator and the friction force; since the friction force on the central shaft is small during clockwise rotation, w1 is larger than w2, and the central shaft rotates clockwise by an angle at the end of a period. The driver has the advantages of quick response, high precision, no electromagnetic interference and the like of a common piezoelectric driver, and also has the advantages of simple structure, easy acquisition of driving signals and simple driving principle.
Drawings
FIG. 1 is a schematic view of the overall structure of an inertial rotary drive with a composite foot support of the present invention.
FIG. 2 is a schematic view of a composite foot rest of an inertial rotational drive having a composite foot rest according to the present invention.
FIG. 3 is a schematic representation of the motion of an inertial rotary drive with a compound foot support of the present invention.
Detailed Description
Referring to fig. 1, 2 and 3, the inertial rotation driver with a composite foot support of the present invention is composed of a fixed circumference 1, a central rotating shaft 2, a piezoelectric vibrator 3, a connecting circumference 4 and a composite foot support 5; wherein:
the fixed circumference 1 is a circular ring-shaped component, the central rotating shaft 2 is a cylindrical component and can rotate around the axis of the central rotating shaft, the piezoelectric vibrator 3 is formed by sticking piezoelectric sheet materials on a rectangular elastic base body, the connecting circumference 4 is a circular ring-shaped component, and the composite foot support 5 is a cylindrical component formed by compounding a low friction coefficient material 51 and a high friction coefficient material 52; the fixed circumference 1 is connected with the frame, one end of the piezoelectric vibrator 3 is connected with the central rotating shaft 2, the other end of the piezoelectric vibrator is connected with the connecting circumference 4, the composite foot supports 5 are uniformly arranged on the outer circular ring surface of the connecting circumference 4, and the composite foot supports 5 are in contact with the fixed circumference 1.
When the piezoelectric vibrator works, the piezoelectric vibrator does reciprocating motion under the drive of sine alternating voltage, and because the high-friction-coefficient material and the low-friction-coefficient material of the composite foot support are alternately contacted with the fixed circumference, and the rotating directions are different, the friction force of the fixed circumference on the composite foot support is different, so that the resultant force which is not received when the central rotating shaft is turned is changed, and finally the central rotating shaft realizes directional rotation. The working principle of the driver is schematically shown in fig. 3: as shown in fig. 3 (a), when the piezoelectric vibrator is not energized, the actuator is in a stationary state; as shown in fig. 3 (b), when the driving voltage gradually increases from the minimum to the maximum, the piezoelectric vibrator moves clockwise, at this time, the low-friction-coefficient material of the composite foot support is in contact with the fixed circumference, the friction force generated by the contact is small, and the central shaft rotates clockwise by an angle of w1 under the combined action of the driving force of the piezoelectric vibrator and the friction force; as shown in fig. 3 (c), when the driving voltage gradually decreases from the maximum to the minimum, the piezoelectric vibrator performs counterclockwise motion, at this time, the high friction coefficient material of the composite foot support is in contact with the fixed circumference, the friction force generated by the contact is large, and the central shaft rotates counterclockwise by an angle of w2 under the combined action of the driving force of the piezoelectric vibrator and the friction force; since the friction force on the central shaft is small when rotating counterclockwise, w1 is larger than w2, and the central shaft rotates clockwise by an angle at the end of a period. The driver has the advantages of quick response, high precision, no electromagnetic interference and the like of a common piezoelectric driver, and also has the advantages of simple structure, easy acquisition of driving signals and simple driving principle.
Claims (1)
1. An inertial rotational drive with a composite foot mount comprising: the piezoelectric vibrator comprises a fixed circumference (1), a central rotating shaft (2), a piezoelectric vibrator (3) and a connecting circumference (4), and is characterized by also comprising a composite foot support (5); the fixed circumference (1) is a circular ring-shaped member, the central rotating shaft (2) is a cylindrical member and can rotate around the axis of the central rotating shaft, the piezoelectric vibrator (3) is formed by sticking piezoelectric sheet materials on a rectangular elastic base body, the connecting circumference (4) is a circular ring-shaped member, and the composite foot support (5) is a cylindrical member formed by compounding a low friction coefficient material (51) and a high friction coefficient material (52); the fixed circumference (1) is connected with the frame, one end of the piezoelectric vibrator (3) is connected with the central rotating shaft (2), the other end of the piezoelectric vibrator is connected with the connecting circumference (4), the composite foot support (5) is uniformly arranged on the outer ring surface of the connecting circumference (4), the composite foot support (5) is in contact with the fixed circumference (1), and when the piezoelectric vibrator is driven by sine alternating voltage to do reciprocating motion, the high-friction-coefficient material and the low-friction-coefficient material of the composite foot support are in alternate contact with the fixed circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811059634.9A CN109104119B (en) | 2018-09-12 | 2018-09-12 | Inertial rotation driver with composite foot support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811059634.9A CN109104119B (en) | 2018-09-12 | 2018-09-12 | Inertial rotation driver with composite foot support |
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| Publication Number | Publication Date |
|---|---|
| CN109104119A CN109104119A (en) | 2018-12-28 |
| CN109104119B true CN109104119B (en) | 2023-03-17 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009055779A (en) * | 2007-07-31 | 2009-03-12 | Konica Minolta Opto Inc | Ultrasonic actuator, magnetic recording apparatus |
| JP2010259182A (en) * | 2009-04-23 | 2010-11-11 | Nikon Corp | Motor device, method for driving rotor, and method for driving shaft member |
| CN107968594A (en) * | 2018-01-12 | 2018-04-27 | 吉林大学 | A kind of bidirectional rotation driver with compound foot bearing |
| CN108063564A (en) * | 2018-01-12 | 2018-05-22 | 吉林大学 | A kind of novel friction type linear piezoelectric actuator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090121586A1 (en) * | 2007-11-13 | 2009-05-14 | Multimetrixs, Llc. | Apparatus for transforming inverse piezoelectric effect into rotary motion and method of manufacturing aforementioned apparatus |
| BE1022342B1 (en) * | 2014-01-09 | 2016-03-25 | Xeryon Bvba | Positioning device |
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2018
- 2018-09-12 CN CN201811059634.9A patent/CN109104119B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009055779A (en) * | 2007-07-31 | 2009-03-12 | Konica Minolta Opto Inc | Ultrasonic actuator, magnetic recording apparatus |
| JP2010259182A (en) * | 2009-04-23 | 2010-11-11 | Nikon Corp | Motor device, method for driving rotor, and method for driving shaft member |
| CN107968594A (en) * | 2018-01-12 | 2018-04-27 | 吉林大学 | A kind of bidirectional rotation driver with compound foot bearing |
| CN108063564A (en) * | 2018-01-12 | 2018-05-22 | 吉林大学 | A kind of novel friction type linear piezoelectric actuator |
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| CN109104119A (en) | 2018-12-28 |
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