CN211018679U - Utilize rotatory ultrasonic motor of flexural vibration mode multi-legged drive - Google Patents
Utilize rotatory ultrasonic motor of flexural vibration mode multi-legged drive Download PDFInfo
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- CN211018679U CN211018679U CN201922386772.4U CN201922386772U CN211018679U CN 211018679 U CN211018679 U CN 211018679U CN 201922386772 U CN201922386772 U CN 201922386772U CN 211018679 U CN211018679 U CN 211018679U
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Abstract
The utility model discloses a rotary ultrasonic motor driven by multiple feet in bending vibration mode, which comprises a shell, a stator arranged in the shell, a rotor passing through the stator in a rotatable way and a driving power supply arranged outside the shell; the stator comprises a hollow polygonal frame-shaped elastic body and a plurality of piezoelectric ceramic pieces, wherein two piezoelectric ceramic pieces are arranged at each outer edge of the polygonal frame-shaped elastic body, driving feet respectively extend from each inner edge of the polygonal frame-shaped elastic body, and the two piezoelectric ceramic pieces positioned on the same outer edge are positioned on two sides of the driving feet corresponding to the inner edges; the piezoelectric ceramic pieces are divided into two groups, the two groups of piezoelectric ceramic pieces are respectively and electrically connected with corresponding output ends of the driving power supply, the two piezoelectric ceramic pieces on the same outer side are respectively positioned in different groups, and the two adjacent piezoelectric ceramic pieces are also respectively positioned in different groups. Compared with the prior art, the structure is simple, the driving control mode is simple, and the output efficiency of the rotary ultrasonic motor is improved; meanwhile, each part is small in processing difficulty.
Description
Technical Field
The utility model relates to a rotatory supersound motor, more specifically say and relate to an utilize rotatory supersound motor of flexural vibration mode multi-legged drive.
Background
The ultrasonic motor is a novel micro special motor, the rotary ultrasonic motor is a type of the ultrasonic motor, the working principle of the rotary ultrasonic motor is that the inverse piezoelectric effect of a piezoelectric element is utilized to convert input electric energy into mechanical energy, mechanical vibration (micron order) of ultrasonic frequency of a stator vibrating body is excited, and the rotor is directly driven to rotate through the friction coupling effect between the stator and the rotor.
Compared with the traditional electromagnetic motor, the ultrasonic motor has the advantages of high corresponding speed (millisecond level), high positioning precision, no electromagnetic interference, power failure self-locking and the like, and has wide application prospect in the fields of precision instruments, aerospace, micro-electro-mechanical systems, medical instruments and the like. However, the existing rotary ultrasonic motor generally has the problems of complex stator structure, large volume and large processing difficulty.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an utilize rotatory ultrasonic motor of flexural vibration mode multi-legged drive, its simple structure, volume are less, and processing is easy, and drive control mode is simple simultaneously.
In order to achieve the above purpose, the utility model discloses a solution is:
a rotary ultrasonic motor driven by bending vibration mode and multiple feet comprises a shell, a stator arranged in the shell, a rotor passing through the stator in a rotatable manner and a driving power supply arranged outside the shell; the stator comprises a hollow polygonal frame-shaped elastic body and a plurality of piezoelectric ceramic pieces, two piezoelectric ceramic pieces are arranged at each outer edge of the polygonal frame-shaped elastic body, a driving foot for contacting and matching with the rotor extends from each inner edge of the polygonal frame-shaped elastic body, and the two piezoelectric ceramic pieces on the same outer edge are positioned on two sides of the driving foot corresponding to the inner edges; the piezoelectric ceramic pieces are divided into two groups, the two groups of piezoelectric ceramic pieces are respectively and electrically connected with corresponding output ends of the driving power supply, the two piezoelectric ceramic pieces on the same outer side are respectively located in different groups, and the two adjacent piezoelectric ceramic pieces are also respectively located in different groups.
The driving power supply is provided with two independent driving signals, the corresponding output end of the driving power supply is a signal output end, the two driving signals are respectively electrically connected with the two signal output ends in a one-to-one correspondence mode, the two driving signals are square wave driving signals or sine driving signals, and the phase difference of the two driving signals is pi/2.
The piezoelectric ceramic pieces are polarized along the thickness direction, and the polarization mode of each piezoelectric ceramic piece is d31。
The shell comprises a shell body and a stator mounting seat mounted on the shell body, a mounting cavity is formed in the shell body and the stator mounting seat after the shell body and the stator mounting seat are mounted, the polygonal frame-shaped elastic body is mounted on the stator mounting seat, and the polygonal frame-shaped elastic body is located in the mounting cavity.
The stator mounting seat and the shell are respectively provided with a bearing, the two bearings are respectively arranged on two sides of the polygonal frame-shaped elastic body, and two ends of the rotor are respectively arranged in the bearings in a penetrating manner.
Each driving foot is in a semi-cylinder shape.
Each piezoelectric ceramic piece is a square piece.
After the structure is adopted, the utility model discloses following beneficial effect has: the utility model adopts the stator in the shape of the polygonal frame for driving, has simple structure and simple driving control mode, and two piezoelectric ceramic plates are respectively pasted on each outer edge of the polygonal frame-shaped elastomer, thereby ensuring the output efficiency of the rotary ultrasonic motor; meanwhile, the whole volume formed by all the parts is small, microminiaturization is easier to realize, and the parts are simple in structure, small in processing difficulty and convenient to connect.
Drawings
Fig. 1 is a schematic structural view of a rotary ultrasonic motor according to the present invention;
fig. 2 is a cross-sectional view of a rotary ultrasonic motor according to the present invention;
FIG. 3 is a schematic view of the stator and rotor assembly of the present invention (with the flange omitted);
FIG. 4 is a schematic structural view of a three-sided frame-shaped elastic body according to the present invention;
FIG. 5 is a schematic view of a first stage bending vibration of a three-sided frame-shaped elastomer according to the present invention;
FIG. 6 is a schematic diagram of a second stage bending vibration of the three-sided frame body elastomer according to the present invention;
fig. 7 is a third stage bending vibration diagram of the three-sided frame body elastic body according to the present invention;
fig. 8 is a schematic view of the fourth stage bending vibration of the three-sided frame body elastic body according to the present invention.
In the figure:
10-a housing; 11-a housing;
111-a mounting cavity; 12-a stator mount;
13-a bearing; 20-a stator;
21-polygonal frame-shaped elastic body; 211-drive foot;
22-piezoelectric ceramic plate; 30-rotor.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.
A rotary ultrasonic motor driven by a bending vibration mode multi-legged drive, as shown in FIGS. 1 to 4, includes a housing 10, a stator 20, a rotor 30, and a driving power source. The stator 20 is installed in the outer case 10, the rotor 20 passes through the stator in a rotatable manner, the driving power source is installed outside the outer case 10, and the driving power source can output two independent driving signals.
As shown in fig. 1 to 4, the stator 20 includes a polygonal frame-shaped elastic body 21 and piezoelectric ceramic plates 22, the polygonal frame-shaped elastic body 21 has a plurality of sides, each side includes a corresponding outer side and an inner side, each inner side of the polygonal frame-shaped elastic body 21 jointly encloses a hollow portion, the rotor 30 passes through the hollow portion, two piezoelectric ceramic plates 22 are respectively attached to each outer side of the polygonal frame-shaped elastic body, and the two piezoelectric ceramic plates 22 on the same outer side are arranged side by side.
In the utility model, for the convenience of description, one side that the multilateral frame-shaped elastomer 21 surrounds is the inboard, and the one side that deviates from mutually is the outside.
Each inner edge of the polygonal frame-shaped elastic body 21 extends inward to form a driving foot 211, and the driving feet 211 are used for contacting and matching with the rotor 30 to rotate the rotor 30, in other words, each driving foot 211 contacts with the rotor through the bending deformation of the corresponding polygonal frame-shaped elastic body 21, so as to drive the rotor 30 to rotate. The two piezoelectric ceramic pieces 22 located on the same outer side are respectively located on two sides of the driving foot 211 corresponding to the inner side, that is, each driving foot 211 is respectively located between the two corresponding piezoelectric ceramic pieces 22 located on the outer side. The piezoelectric ceramic pieces 22 are divided into two groups, the two groups of piezoelectric ceramic pieces are respectively and electrically connected with the corresponding output ends of the driving power supply, the two piezoelectric ceramic pieces 22 on the same outer side are respectively positioned in different groups, and the two adjacent piezoelectric ceramic pieces are also respectively positioned in different groups.
Specifically, each of the driving legs 211 has a semi-cylindrical shape, and each of the driving legs 211 is in contact with the outer surface of the rotor 30. Each piezoelectric ceramic piece 22 is rectangular, each piezoelectric ceramic piece 22 in the same group is electrically connected to the same corresponding output end of the driving power supply, wherein each piezoelectric ceramic piece 22 is polarized along the thickness direction in the polarization mode d31。
In the present invention, the polygonal frame-shaped elastic body 21 is made of an elastic metal material, such as red copper, 45 steel or aircraft aluminum.
As shown in fig. 1-2, the rotor 30 passes through the hollow portion of the multi-frame elastic body 21, and both ends of the rotor 30 are rotatably mounted on the housing 10, respectively. Specifically, the housing 10 includes a shell 11 and a stator mounting seat 12, the shell 11 and the stator mounting seat 12 are mounted together, and a mounting cavity 111 is formed inside the shell 11 and the stator mounting seat 12 after mounting, wherein the mounting structure between the shell 11 and the stator mounting seat 12 is a conventional mounting structure, for example, the two are mounted together by using screws; the polygonal frame-shaped elastic body 21 is located in the mounting cavity 111, and the polygonal frame-shaped elastic body 21 is mounted at one side of the stator mounting seat 12 facing the mounting cavity 111, and the mounting of the stator mounting seat 12 and the polygonal frame-shaped elastic body 21 is also a conventional mounting structure, for example, the stator mounting seat 12 and the polygonal frame-shaped elastic body 21 are mounted together by using screws; the bearings 13 are respectively mounted on the housing 11 and the stator mounting base 12, the two bearings 13 are respectively disposed on two sides of the polygonal frame-shaped elastic body 21, the two bearings 13 are arranged opposite to each other, two ends of the rotor 30, that is, two ends of the rotating shaft of the rotor 30 and the two bearings 13 are respectively disposed one by one, and two ends of the rotor 30 are respectively inserted into the corresponding bearings 13.
In this embodiment, the stator mounting base 12 may be a flange, and the flange and the bearing 13 mounted thereon may together constitute a conventional well-known tape-flange bearing. The housing 11 may also be an existing conventional bearing housing. A bearing end cover is provided on the bearing seat corresponding to the bearing, so that the housing 11 and the stator mounting seat 12 form a sealed space.
The utility model discloses in, foretell drive power supply's corresponding output is signal output part, and foretell drive power supply's two way independent drive signal is connected with two signal output part one-to-ones, uses wired connection as the example here, and drive signal is applyed on a set of piezoceramics piece all the way, and another way drive signal is applyed on another set of piezoceramics piece. The two driving signals are both square wave driving signals or sine driving signals, and the phase difference of the two driving signals is pi/2.
In this embodiment, the two driving signals are both square wave driving signals, and the polygonal frame-shaped elastic body 21 is a three-sided frame elastic body.
As shown in fig. 3 to 4, when the polygonal frame-shaped elastic body 21 is a three-sided frame elastic body, six piezoelectric ceramic plates 22 are provided, and each piezoelectric ceramic plate of one group is a piezoelectric ceramic plate E1And each piezoelectric ceramic piece of the other group is a piezoelectric ceramic piece E2Piezoelectric ceramic pieces E1Are all connected with the same corresponding output of the driving power supplyOutput end connection, each piezoelectric ceramic piece E2Are all connected with the same corresponding output end of the driving power supply. Thus, the three-sided frame elastic body is arranged in the following manner in sequence in the counterclockwise direction with the upper corner in fig. 4 as a starting point: piezoelectric ceramic piece E1Piezoelectric ceramic piece E2Piezoelectric ceramic piece E1Piezoelectric ceramic piece E2Piezoelectric ceramic piece E1Piezoelectric ceramic piece E2。
As shown in fig. 5 to 8, when the rotary ultrasonic motor is in the operation mode, the driving power is applied to the three piezoelectric ceramic plates E respectively1The first top wave driving signal is applied to the three piezoelectric ceramic plates E2And the phase difference between the first square wave driving signal and the second square wave driving signal is pi/2, wherein the first square wave driving signal and the second square wave driving signal both comprise a positive voltage signal and a negative voltage signal.
Under the excitation of a square wave driving signal I and a square wave driving signal II, two groups of piezoelectric ceramic pieces are excited to generate different deformations, so that each side of the three-side frame elastic body generates bending vibration, and the bending vibration process is divided into four stages, specifically as follows:
in the first stage, positive voltage signals are simultaneously applied to the two groups of piezoelectric ceramic pieces to excite the two groups of piezoelectric ceramic pieces on each edge to simultaneously stretch, so that each edge is bent outwards convexly, and the driving feet 211 on each edge are driven to move outwards;
second stage, each piezoelectric ceramic piece E1All apply negative voltage signals, each piezoceramic wafer E2All apply positive voltage signal to excite the piezoelectric ceramic piece E on each side1All shrink to make each side correspond to the piezoelectric ceramic piece E1The part of the piezoelectric ceramic plate generates inward concave bending to excite the piezoelectric ceramic plates E on all sides2Are all stretched to make each side correspond to the piezoelectric ceramic piece E2The portion of (a) produces an outwardly convex curvature; thus, the driving feet 211 are driven to move along the counterclockwise direction simultaneously;
in the third stage, the two groups of piezoelectric ceramic pieces apply negative voltage signals at the same time to excite the two groups of piezoelectric ceramic pieces on each edge to contract at the same time, so that each edge is bent inwards, and the driving feet 211 on each edge are driven to move inwards;
in the fourth stage, each piezoelectric ceramic piece E1All apply positive voltage signals, each piezoceramic wafer E2All apply negative voltage signals to excite the piezoelectric ceramic plates E on all sides1Are all stretched to make each side correspond to the piezoelectric ceramic piece E1The part of the piezoelectric ceramic plate E generates outward convex bending to excite the piezoelectric ceramic plates E on all sides2All shrink to make each side correspond to the piezoelectric ceramic piece E2The part of (a) is bent inwards; this moves each drive foot 211 in a clockwise direction.
Through the periodic vibration, the three driving feet 211 are driven to do micro-amplitude high-frequency periodic motion, the input electric energy is converted into mechanical energy, and therefore the rotor rotates through the rolling friction between the three driving feet 211 and the outer side wall of the rotor.
The utility model discloses in, drive power supply is the general drive power supply of current common supersound motor.
In the present invention, the above-mentioned rotor 30 can be output in both sides, and also can be output in single side.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should belong to the scope of the claims of the present invention.
Claims (7)
1. A rotary ultrasonic motor driven by multiple feet in bending vibration mode is characterized in that: the motor comprises a shell, a stator arranged in the shell, a rotor passing through the stator in a rotatable mode and a driving power supply arranged outside the shell; the stator comprises a hollow polygonal frame-shaped elastic body and a plurality of piezoelectric ceramic pieces, two piezoelectric ceramic pieces are arranged at each outer edge of the polygonal frame-shaped elastic body, a driving foot for contacting and matching with the rotor extends from each inner edge of the polygonal frame-shaped elastic body, and the two piezoelectric ceramic pieces on the same outer edge are positioned on two sides of the driving foot corresponding to the inner edges; the piezoelectric ceramic pieces are divided into two groups, the two groups of piezoelectric ceramic pieces are respectively and electrically connected with corresponding output ends of the driving power supply, the two piezoelectric ceramic pieces on the same outer side are respectively located in different groups, and the two adjacent piezoelectric ceramic pieces are also respectively located in different groups.
2. A rotary ultrasonic motor driven by bending vibration mode multi-feet according to claim 1, characterized in that: the driving power supply is provided with two independent driving signals, the corresponding output end of the driving power supply is a signal output end, the two driving signals are respectively electrically connected with the two signal output ends in a one-to-one correspondence mode, the two driving signals are square wave driving signals or sine driving signals, and the phase difference of the two driving signals is pi/2.
3. A rotary ultrasonic motor driven by a flexural vibration mode multi-foot according to claim 1 or 2, characterized in that: the piezoelectric ceramic pieces are polarized along the thickness direction, and the polarization mode of each piezoelectric ceramic piece is d31。
4. A rotary ultrasonic motor driven by a flexural vibration mode multi-foot according to claim 1 or 2, characterized in that: the shell comprises a shell body and a stator mounting seat mounted on the shell body, a mounting cavity is formed in the shell body and the stator mounting seat after the shell body and the stator mounting seat are mounted, the polygonal frame-shaped elastic body is mounted on the stator mounting seat, and the polygonal frame-shaped elastic body is located in the mounting cavity.
5. A rotary ultrasonic motor driven by bending vibration mode multi-feet according to claim 4, wherein: the stator mounting seat and the shell are respectively provided with a bearing, the two bearings are respectively arranged on two sides of the polygonal frame-shaped elastic body, and two ends of the rotor are respectively arranged in the bearings in a penetrating manner.
6. A rotary ultrasonic motor driven by bending vibration mode multi-feet according to claim 1, characterized in that: each driving foot is in a semi-cylinder shape.
7. A rotary ultrasonic motor driven by bending vibration mode multi-feet according to claim 1, characterized in that: each piezoelectric ceramic piece is a square piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922386772.4U CN211018679U (en) | 2019-12-26 | 2019-12-26 | Utilize rotatory ultrasonic motor of flexural vibration mode multi-legged drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922386772.4U CN211018679U (en) | 2019-12-26 | 2019-12-26 | Utilize rotatory ultrasonic motor of flexural vibration mode multi-legged drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211018679U true CN211018679U (en) | 2020-07-14 |
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ID=71477841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922386772.4U Expired - Fee Related CN211018679U (en) | 2019-12-26 | 2019-12-26 | Utilize rotatory ultrasonic motor of flexural vibration mode multi-legged drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211018679U (en) |
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2019
- 2019-12-26 CN CN201922386772.4U patent/CN211018679U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200714 Termination date: 20211226 |