CN112104258A - Clamp type inertia piezoelectric linear motor - Google Patents
Clamp type inertia piezoelectric linear motor Download PDFInfo
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- CN112104258A CN112104258A CN202010964410.3A CN202010964410A CN112104258A CN 112104258 A CN112104258 A CN 112104258A CN 202010964410 A CN202010964410 A CN 202010964410A CN 112104258 A CN112104258 A CN 112104258A
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- 239000000919 ceramic Substances 0.000 claims abstract description 15
- 238000010586 diagram Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000256247 Spodoptera exigua Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000003825 pressing Methods 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
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/04—Constructional details
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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
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/021—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors using intermittent driving, e.g. step motors, piezoleg motors
- H02N2/025—Inertial sliding motors
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Abstract
The invention discloses a clamp type inertia piezoelectric linear motor which comprises a stator fixing frame and an output rod, wherein the stator fixing frame is of a hollow structure, two ends of the stator fixing frame are respectively connected with a left lever and a right lever, the upper end and the lower end of the left lever and the right lever are respectively and horizontally provided with an upper clamp block and a lower clamp block, and a wedge block is arranged between the two lower clamp blocks; the stator fixing frame is internally provided with annular laminated piezoelectric ceramics, the upper end of the annular laminated piezoelectric ceramics is abutted against the inner surface of the upper end of the stator fixing frame, the lower end of the annular laminated piezoelectric ceramics is abutted against the upper end of a wedge block, an output rod downwards sequentially penetrates through the stator fixing frame, the annular laminated piezoelectric ceramics and the wedge block, and the lower end of the output rod extends out of the wedge block. The stator in the inertia piezoelectric linear motor adopts a clamp type structure, and the left lever and the right lever can be adjusted to meet different precision requirements; meanwhile, the clamp type structure can improve the output thrust by increasing the positive pressure and the friction force between the clamp and the output rod during working while realizing high precision.
Description
Technical Field
The invention belongs to the technical field of piezoelectric precise actuation, and particularly relates to a clamp type inertia piezoelectric linear motor.
Background
The piezoelectric linear motor has the characteristics of high positioning precision, high response speed, flexible design, no electromagnetic interference and the like, and has wide application prospect in the emerging leading-edge scientific and technological field. In recent years, piezoelectric linear motors have been rapidly developed with the wide focus of many researchers. The piezoelectric motors can be classified according to principles, and can be divided into resonant motors and non-resonant motors, in the resonant motors, a vibrating body is driven by signals of ultrasonic frequency band frequencies to generate micro-amplitude vibration through modal coupling, a rotor is driven to generate large-stroke motion by virtue of friction force, and the stability of the motion of the motor is reduced by virtue of the application of a coupling mode.
The non-resonance type piezoelectric motor can be further divided into a piezoelectric driving walking motor and an inertia driving motor, the piezoelectric driving walking motor is also called as an inchworm motor, and a plurality of piezoelectric actuators are used for alternately clamping and moving a rotor; in the inertia type piezoelectric motor, the motion is derived from asymmetric excitation of an input signal, the inertia type piezoelectric motor belongs to a single-phase driving mode, is simple in structure and high in precision, and is widely applied to high-end equipment in the frontier fields of optics, biomedicine, intelligent manufacturing and the like. However, the performance of such a motor currently has a limiting factor: although the motor has high precision, the thrust of the motor is small, and the motor is difficult to bear working load.
Disclosure of Invention
The invention aims to solve the technical problem of providing a clamp type inertia piezoelectric linear motor with flexible design, small volume and large thrust-weight ratio aiming at the defects of the prior art.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a clamp-on inertial piezoelectric linear motor, wherein: the clamp comprises a stator fixing frame and an output rod, wherein the stator fixing frame is of a hollow structure, two ends of the stator fixing frame are respectively connected with a left lever and a right lever, the upper end and the lower end of the left lever and the right lever are respectively and horizontally provided with an upper clamp block and a lower clamp block, a wedge block is arranged between the two lower clamp blocks,
the output rod penetrates through the stator fixing frame, the annular laminated piezoelectric ceramics and the wedge block downwards in sequence, and the lower end of the output rod extends out of the wedge block.
In order to optimize the technical scheme, the specific measures adopted further comprise:
furthermore, the end faces, close to each other, of the two upper clamp blocks are sequentially a vertical plane and an inclined plane from top to bottom, the two inclined planes form a splayed shape, and the distance between the two clamp blocks is larger than the diameter of the cross section of the output rod.
Further, the distance between the two upper clamp blocks is smaller than the distance between the two lower clamp blocks.
Further, the shape of two wedge surfaces of the wedge block is consistent with the shape of the end surface of the lower clamping block which is correspondingly contacted with the wedge block.
Furthermore, the end surfaces of the two lower clamp blocks, which are close to each other, are inverted splayed.
Furthermore, the left lever and the right lever are respectively and flexibly hinged with the stator fixing frame through the left straight beam and the right straight beam.
Further, the upper end of the stator fixing frame is provided with an upper through hole, the lower end of the stator fixing frame is provided with a lower through hole, the annular laminated piezoelectric ceramic is provided with a first through hole, the wedge block is provided with a second through hole, the circle centers of the upper through hole, the lower through hole, the first through hole and the second through hole are all located on the same vertical line, the upper through hole is smaller than the lower through hole, the sizes of the upper through hole, the first through hole and the second through hole are all consistent, the output rod sequentially penetrates through the first through hole and the second through hole from the upper through hole downwards, and the annular laminated piezoelectric ceramic penetrates through the lower through hole and is.
Furthermore, the annular laminated piezoelectric ceramic extends to downwards push the wedge block to jack the left two lower clamp blocks under the sawtooth wave electric signal, so that the two upper clamp blocks at the upper ends of the left lever and the right lever are close to each other to be matched with each other to clamp the output rod, and the output rod is pushed to do linear motion along the axial direction.
The invention has the beneficial effects that:
the stator in the inertia piezoelectric linear motor adopts a clamp type structure, and the left lever and the right lever can be flexibly designed according to actual application to meet different precision requirements; meanwhile, the clamp type structure can improve the output thrust by increasing the positive pressure and the friction force between the clamp and the output rod during working while realizing high precision. The invention has simple structure and avoids complex clamping mechanism and pressing mechanism.
Drawings
FIG. 1 is a schematic structural diagram of a clamp type inertial piezoelectric linear motor according to the present invention;
FIG. 2 is a schematic structural view of a stator;
FIG. 3 is a schematic diagram of the motor with a disassembled overall structure;
FIG. 4 is a schematic diagram of motor motion during a period when a sawtooth signal is applied.
The reference signs are: the device comprises a stator fixing frame 1, an output rod 2, a left lever 3, a right lever 4, an upper clamp block 5, a lower clamp block 6, a wedge 7, annular laminated piezoelectric ceramics 8, a left straight beam 9 and a right straight beam 10.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, the invention relates to a clamp type inertia piezoelectric linear motor, which comprises a stator fixing frame 1 and an output rod 2, wherein the stator fixing frame 1 is of a hollow structure, two ends of the stator fixing frame 1 are respectively connected with a left lever 3 and a right lever 4, the upper end and the lower end of each of the left lever 3 and the right lever 4 are respectively and horizontally provided with an upper clamp block 5 and a lower clamp block 6, and a wedge block 7 is arranged between the two lower clamp blocks 6;
the utility model discloses a fixed frame of stator, including the fixed frame of stator 1, be provided with annular stromatolite piezoceramics 8 in the fixed frame of stator 1, the upper end of annular stromatolite piezoceramics 8 supports and leans on the internal surface at the fixed frame of stator 1 upper end, the lower extreme of annular stromatolite piezoceramics 8 supports and leans on 7 upper ends of voussoirs, output rod 2 passes fixed frame of stator 1, annular stromatolite piezoceramics 8, voussoir 7 downwards in proper order, 2 lower extremes.
As shown in fig. 2, the end surfaces of the two upper gripper blocks 5, which are close to each other, are a vertical plane and an inclined plane in sequence from top to bottom, the two inclined planes form a splayed shape, and the distance between the two upper gripper blocks 5 is greater than the diameter of the cross section of the output rod 2; the distance between the two upper clamp blocks 5 is smaller than the distance between the two lower clamp blocks 6; the shapes of two wedge surfaces of the wedge 7 are consistent with the shapes of the end surfaces of the lower clamp blocks 6 correspondingly contacted with the wedge; the end surfaces of the two lower clamp blocks 6 close to each other are in the shape of inverted V; the left lever 3 and the right lever 4 are respectively flexibly hinged with the stator fixing frame 1 through a left straight beam 9 and a right straight beam 10.
As shown in fig. 2 and 3, the upper end of the stator fixing frame 1 is provided with an upper through hole, the lower end of the stator fixing frame is provided with a lower through hole, the annular laminated piezoelectric ceramic 8 is provided with a first through hole, the wedge 7 is provided with a second through hole, the circle centers of the upper through hole, the lower through hole, the first through hole and the second through hole are all located on the same vertical line, the upper through hole is smaller than the lower through hole, the sizes of the upper through hole, the first through hole and the second through hole are all consistent, the output rod 2 sequentially penetrates through the first through hole and the second through hole from the upper through hole downwards, and the annular laminated piezoelectric ceramic 8 penetrates through the lower through hole and is.
The working modes of the motor structure of the invention are as follows:
as shown in fig. 4, after the ring-shaped laminated piezoelectric ceramic 8 receives the sawtooth wave electric signal that rises and falls slowly, the motor undergoes a motion process in a cycle:
the point O is in an initial state, and all parts are in a relaxed state;
from O to A, a voltage signal slowly rises, the annular laminated piezoelectric ceramic 8 slowly extends to push the wedge 7 to move downwards, the left and right lower clamp blocks 6 are jacked open through the left wedge surface and the right wedge surface, and the left and right upper clamp blocks 5 are matched with the clamping output rod 2 and move downwards for a certain distance along the axial direction through the left flexible hinge and the right flexible hinge;
from A to B, the voltage signal is rapidly reduced, the annular laminated piezoelectric ceramic 8 is rapidly retracted to the original length, the wedge block 7 moves upwards to the original position, the left lever and the right lever respectively return to the original state, the left upper clamp block 5 and the right upper clamp block 5 release the output rod 2, and the original state is recovered;
the above processes are repeated, and the large-stroke unidirectional motion of the output rod 2 can be realized.
The structure is reversely arranged on the output rod 2, so that the reverse movement of the output rod can be realized.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (8)
1. The utility model provides a clamp formula inertia piezoelectricity linear electric motor which characterized in that: the device comprises a stator fixing frame (1) and an output rod (2), wherein the stator fixing frame (1) is of a hollow structure, two ends of the stator fixing frame (1) are respectively connected with a left lever (3) and a right lever (4), the upper end and the lower end of the left lever (3) and the upper end and the lower end of the right lever (4) are respectively and horizontally provided with an upper clamping block (5) and a lower clamping block (6), and a wedge block (7) is placed between the two lower clamping blocks (6);
be provided with annular stromatolite piezoceramics (8) in the fixed frame of stator (1), the upper end of annular stromatolite piezoceramics (8) is supported and is leaned on the internal surface of the fixed frame of stator (1) upper end, the lower extreme of annular stromatolite piezoceramics (8) is supported and is leaned on voussoir (7) upper end, output rod (2) are passed stator fixed frame (1), annular stromatolite piezoceramics (8), voussoir (7) downwards in proper order, voussoir (7) are stretched out to output rod (2) lower extreme.
2. The clamp-on inertial piezoelectric linear motor of claim 1, wherein: the end faces, close to each other, of the two upper clamping blocks (5) are vertical planes and inclined planes sequentially from top to bottom, the two inclined planes form a splayed shape, and the distance between the two clamping blocks (5) is larger than the diameter of the cross section of the output rod (2).
3. A clamp-on inertial piezoelectric linear motor according to claim 2, wherein: the distance between the two upper clamping blocks (5) is smaller than the distance between the two lower clamping blocks (6).
4. A clamp-on inertial piezoelectric linear motor according to claim 3, wherein: the shapes of the two wedge surfaces of the wedge block (7) are consistent with the shapes of the end surfaces of the lower clamp blocks (6) which are correspondingly contacted with the wedge block.
5. The inertial piezoelectric linear motor of claim 4, wherein: the end surfaces of the two lower clamp blocks (6) which are close to each other are inverted splayed.
6. The clamp-on inertial piezoelectric linear motor of claim 1, wherein: the left lever (3) and the right lever (4) are flexibly hinged with the stator fixing frame (1) through a left straight beam (9) and a right straight beam (10) respectively.
7. The clamp-on inertial piezoelectric linear motor of claim 1, wherein: the utility model discloses a stator, including the fixed frame of stator (1), the through-hole has been seted up to the fixed frame of stator (1) upper end, and the lower extreme has been seted up down the through-hole, first through-hole has been seted up in annular stromatolite piezoceramics (8), the second through-hole has been seted up in voussoir (7), the centre of a circle of going up through-hole, lower through-hole, first through-hole and second through-hole all is in same vertical line, it is less than down the through-hole to go up the through-hole, it is all unanimous to go up through-hole, first through-hole and second through-hole are passed downwards in proper order in output pole (2), annular stromatolite piezoc.
8. The clamp-on inertial piezoelectric linear motor of claim 1, wherein: the annular laminated piezoelectric ceramic (8) extends to downwards push a wedge block (7) to jack a left lower clamp block (6) under a sawtooth wave electric signal, so that two upper clamp blocks (5) at the upper ends of a left lever (3) and a right lever (4) are close to each other to be matched with each other to clamp an output rod (2), and the output rod (2) is pushed to do linear motion along the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010964410.3A CN112104258B (en) | 2020-09-15 | 2020-09-15 | Clamp type inertia piezoelectric linear motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010964410.3A CN112104258B (en) | 2020-09-15 | 2020-09-15 | Clamp type inertia piezoelectric linear motor |
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| CN112104258A true CN112104258A (en) | 2020-12-18 |
| CN112104258B CN112104258B (en) | 2021-08-31 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1474504A (en) * | 2003-07-16 | 2004-02-11 | 沈阳工业大学 | Magnetic control shape memery alloy crawling type linea motor |
| EP2590315A1 (en) * | 2011-11-02 | 2013-05-08 | Physik Instrumente (PI) GmbH & Co. KG | Drive device |
| CN104716864A (en) * | 2014-12-05 | 2015-06-17 | 南京航空航天大学 | Linear piezoelectric motor of inertia type middle-sized structure and control method thereof |
| CN205195594U (en) * | 2015-12-07 | 2016-04-27 | 天津大学 | Two holders are received a little to dual drive |
| CN106787935A (en) * | 2016-12-16 | 2017-05-31 | 南京航空航天大学 | A kind of inertia non-resonant biped piezoelectric straight line actuator and method of work |
| CN108964512A (en) * | 2018-08-07 | 2018-12-07 | 苏州大学 | A kind of across scale motion platform of inertia stick-slip formula |
| CN110581670A (en) * | 2019-09-27 | 2019-12-17 | 长春工业大学 | Precise linear driving device with clamping type stator |
-
2020
- 2020-09-15 CN CN202010964410.3A patent/CN112104258B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1474504A (en) * | 2003-07-16 | 2004-02-11 | 沈阳工业大学 | Magnetic control shape memery alloy crawling type linea motor |
| EP2590315A1 (en) * | 2011-11-02 | 2013-05-08 | Physik Instrumente (PI) GmbH & Co. KG | Drive device |
| CN104716864A (en) * | 2014-12-05 | 2015-06-17 | 南京航空航天大学 | Linear piezoelectric motor of inertia type middle-sized structure and control method thereof |
| CN205195594U (en) * | 2015-12-07 | 2016-04-27 | 天津大学 | Two holders are received a little to dual drive |
| CN106787935A (en) * | 2016-12-16 | 2017-05-31 | 南京航空航天大学 | A kind of inertia non-resonant biped piezoelectric straight line actuator and method of work |
| CN108964512A (en) * | 2018-08-07 | 2018-12-07 | 苏州大学 | A kind of across scale motion platform of inertia stick-slip formula |
| CN110581670A (en) * | 2019-09-27 | 2019-12-17 | 长春工业大学 | Precise linear driving device with clamping type stator |
Non-Patent Citations (1)
| Title |
|---|
| 梁海澄等: "步进式直线压电驱动器研究综述", 《广东轻工职业技术学院学报》 * |
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| CN112104258B (en) | 2021-08-31 |
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Application publication date: 20201218 Assignee: Hanzhong (Nanjing) Technology Co.,Ltd. Assignor: NANJING INSTITUTE OF TECHNOLOGY Contract record no.: X2024980000528 Denomination of invention: A clamp type inertial piezoelectric linear motor Granted publication date: 20210831 License type: Common License Record date: 20240112 |
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