CN204906220U - Novel straight line piezoelectricity actuator - Google Patents
Novel straight line piezoelectricity actuator Download PDFInfo
- Publication number
- CN204906220U CN204906220U CN201520322804.3U CN201520322804U CN204906220U CN 204906220 U CN204906220 U CN 204906220U CN 201520322804 U CN201520322804 U CN 201520322804U CN 204906220 U CN204906220 U CN 204906220U
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- actuator
- drive nut
- nut
- piezoelectric stack
- piezoelectric
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Abstract
The utility model provides a novel straight line piezoelectricity actuator, this actuator of mainly by the lead screw, bear nut, torque motors and drive nut and constitute its characterized in that: bearing the weight of nut, torque motors and drive nut and connecting gradually through flexible shaft coupling and be in the same place, place the inside of shell in, drive nut's opposite side is equipped with piezoelectric stack, and the lead screw lies in the center of actuator, passes piezoelectric stack, drive nut, flexible shaft coupling, torque motors and bears the weight of the nut, and the lead screw lies in actuator inside to be served and be equipped with the ball spline, and the inside of shell is all placed in to piezoelectric stack and ball spline, the utility model has the advantages that: this actuator spiral clamp mechanism moment of torsion that only need deflect does not need the deflecting force, can conveniently provide the deflection moment of torsion through traditional electromagnetism motor or supersound motor, has big stroke, high thrust, outage auto -lock and characteristics such as with low costs.
Description
Technical field
The utility model relates to mechanical equipment technical field, especially relates to a kind of novel linear piezoelectric actuator.
Background technology
Because piezoelectric has superior dynamic property, high-energy-density and increment type stationkeeping ability, so the multinational primary study in the world uses the actuator (piezoelectric actuator) of piezoelectric at present.Compare with traditional electromagnetic actuator, piezoelectric actuator has does not need winding and magnetic circuit, power, positioning precision are high, the advantage such as High power output and fast response time to obtain not rely on electromagnetic coupled.Piezoelectric actuator of a great variety, for being applied to the piezoelectric actuator exporting straight line or rotary motion, can be divided into: piezoelectric ultrasonic motor, Micro Displacement Piezoelectric Actuator for Cutting, piezoelectric inertia actuator and piezoelectricity looper actuator.At present, piezoelectric ultrasonic motor development is comparatively ripe, and Successful utilization is in the fields such as optical apparatus, automobile, Aero-Space and biomedical engineering.Piezoelectric ultrasonic motor have low speed high torque, compact conformation, fast response time, noise extremely low, cut off self-lock, by magnetic interference, the advantage such as accurate of moving and low temperature resistant, the feature such as normally can to run in a vacuum, but piezoelectric ultrasonic motor causes power output less due to the restriction of its principle.The structure of Micro Displacement Piezoelectric Actuator for Cutting is comparatively simply compact, High power output, and positioning precision is high, and dynamic characteristic is good, but impulse stroke is less.Piezoelectric inertia actuator has the feature of high-resolution, Long Distances, but does not have clamping institution to cause power output less with output rigidity, and positioning precision is low.
Utility model content
For overcoming the problems referred to above, the utility model adopts following technical scheme:
A kind of novel linear piezoelectric actuator, this actuator forms primarily of leading screw, bearing screwed cap, torque motor and drive nut, it is characterized in that: bearing screwed cap, torque motor and drive nut are connected in turn by flexible clutch, be placed in the inside of shell, the opposite side of drive nut is provided with piezoelectric stack, leading screw is positioned at the center of actuator, through piezoelectric stack, drive nut, flexible clutch, torque motor and bearing screwed cap, one end that leading screw is positioned at actuator inside is provided with ball spline, and piezoelectric stack and ball spline are all placed in the inside of shell.
The helicoid of described leading screw and bearing screwed cap and drive nut is carved angle and is less than 7 °.
The utility model has the advantages that: this actuator spiral clamping institution only need deflect moment of torsion, do not need deflecting force, deflection moment of torsion can be provided conveniently by traditional electromagnetic machine or ultrasound electric machine, there is Long Distances, high thrust, cut off self-lock and the feature such as cost is low.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, a kind of novel linear piezoelectric actuator, this actuator is primarily of leading screw 1, bearing screwed cap 2, torque motor 3 and drive nut 4 form, bearing screwed cap 2, torque motor 3 and drive nut 4 are connected in turn by flexible clutch 5, be placed in the inside of shell 8, the opposite side of drive nut 4 is provided with piezoelectric stack 6, leading screw 1 is positioned at the center of actuator, through piezoelectric stack 6, drive nut 4, flexible clutch 5, torque motor 3 and bearing screwed cap 2, one end that leading screw 1 is positioned at actuator inside is provided with ball spline 7, piezoelectric stack 6 and ball spline 7 are all placed in the inside of shell 8.
The helicoid of described leading screw 1 and bearing screwed cap 2 and drive nut 4 is carved angle and is less than 7 °.
Operation principle is as follows:
During work, after applying piezoelectric stack 6 pumping signal and torque motor 3 initiating signal, piezoelectric stack 6 starts to extend, and upwards pushed up by drive nut 4, drive nut 4 drives leading screw 1 to move upward simultaneously.In this process, leading screw 1 drives bearing screwed cap 2 to move upward, and therefore bearing screwed cap 2 no longer bears load pressure, starts to rotate forward under the drive of torque motor 3, produces the axial displacement towards loading end direction.Because the pressure between drive nut 4 and piezoelectric stack 6 is very large, the frictional force produced prevents drive nut 4 following force torque motor 3 to rotate.
Piezoelectric stack 6 continues to be elongated to maximum elongation position, continues to drive leading screw 1 to move upward.In this process, bearing screwed cap 2 continues to rotate forward under the drive of torque motor 3, until cycle loading end, and the same not following force torque motor rotation because of the frictional force between itself and piezoelectric stack 6 of drive nut 4.
Claims (2)
1. a novel linear piezoelectric actuator, this actuator is primarily of leading screw (1), bearing screwed cap (2), torque motor (3) and drive nut (4) composition, it is characterized in that: bearing screwed cap (2), torque motor (3) and drive nut (4) are connected in turn by flexible clutch (5), be placed in the inside of shell (8), the opposite side of drive nut (4) is provided with piezoelectric stack (6), leading screw (1) is positioned at the center of actuator, through piezoelectric stack (6), drive nut (4), flexible clutch (5), torque motor (3) and bearing screwed cap (2), one end that leading screw (1) is positioned at actuator inside is provided with ball spline (7), piezoelectric stack (6) and ball spline (7) are all placed in the inside of shell (8).
2. a kind of novel linear piezoelectric actuator according to claim 1, is characterized in that: the helicoid of described leading screw (1) and bearing screwed cap (2) and drive nut (4) is carved angle and is less than 7 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520322804.3U CN204906220U (en) | 2015-05-19 | 2015-05-19 | Novel straight line piezoelectricity actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520322804.3U CN204906220U (en) | 2015-05-19 | 2015-05-19 | Novel straight line piezoelectricity actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204906220U true CN204906220U (en) | 2015-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520322804.3U Expired - Fee Related CN204906220U (en) | 2015-05-19 | 2015-05-19 | Novel straight line piezoelectricity actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204906220U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108969032A (en) * | 2018-07-09 | 2018-12-11 | 南京航空航天大学 | A kind of magnetic-type laparoscope mechanism of straight line-rotation-oscillation Three Degree Of Freedom |
-
2015
- 2015-05-19 CN CN201520322804.3U patent/CN204906220U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108969032A (en) * | 2018-07-09 | 2018-12-11 | 南京航空航天大学 | A kind of magnetic-type laparoscope mechanism of straight line-rotation-oscillation Three Degree Of Freedom |
| CN108969032B (en) * | 2018-07-09 | 2020-11-24 | 南京航空航天大学 | Straight line-rotation-swing three-degree-of-freedom magnetic attraction type laparoscope mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20160519 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |