CN107947448A - A kind of novel linear piezoelectric actuator - Google Patents
A kind of novel linear piezoelectric actuator Download PDFInfo
- Publication number
- CN107947448A CN107947448A CN201711025925.1A CN201711025925A CN107947448A CN 107947448 A CN107947448 A CN 107947448A CN 201711025925 A CN201711025925 A CN 201711025925A CN 107947448 A CN107947448 A CN 107947448A
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- CN
- China
- Prior art keywords
- actuator
- driving nut
- leading screw
- torque motor
- piezoelectric
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
Abstract
A kind of novel linear piezoelectric actuator, the actuator are mainly made of leading screw, bearing screwed cap, torque motor and driving nut etc., it is characterised in that：Bearing screwed cap, torque motor and driving nut are connected in turn by flexible clutch, it is placed in the inside of shell, the opposite side of driving nut is equipped with piezoelectric stack, leading screw is located at the center of actuator, through piezoelectric stack, driving nut, flexible clutch, torque motor and bearing screwed cap, one end that leading screw is located inside actuator is equipped with ball spline, and piezoelectric stack and ball spline are placed in the inside of shell；It is an advantage of the invention that：The spiral clamping institution of the actuator need to only deflect moment of torsion, be not required to deflecting force, and deflection moment of torsion can be provided conveniently by traditional electromagnetic machine or ultrasound electric machine, have the characteristics that big stroke, high thrust, cut off self-lock it is low with cost.
Description
Technical field
The present invention relates to mechanical equipment technical field, more particularly, to a kind of novel linear piezoelectric actuator.
Background technology
Since piezoelectric has superior dynamic property, high-energy-density and increment type stationkeeping ability, so current generation
The multinational primary study in boundary uses the actuator of piezoelectric（Piezoelectric actuator）.Compared with traditional electromagnetic actuator, piezoelectricity is made
Dynamic utensil, which has, to be not required winding and magnetic circuit, obtains high power, positioning accuracy, High power output and response speed not against electromagnetic coupled
Spend the advantages that fast.The species of piezoelectric actuator is various, can be with for the piezoelectric actuator applied to output straight line or rotary motion
It is divided into：Piezoelectric ultrasonic motor, Micro Displacement Piezoelectric Actuator for Cutting, piezoelectric inertia actuator and piezoelectricity looper actuator.At present, piezoelectricity surpasses
The development of acoustic-electric machine is more mature, in the field such as Successful utilization to optical apparatus, automobile, aerospace and biomedical engineering.
Piezoelectric ultrasonic motor has low speed high torque, compact-sized, fast response time, noise is extremely low, cuts off self-lock, is done from magnetic field
Disturb, move the advantages that accurate and it is low temperature resistant, can in a vacuum normal operation the features such as, but piezoelectric ultrasonic motor is due to its principle
Limitation causes power output smaller.The structure of Micro Displacement Piezoelectric Actuator for Cutting is relatively simple compact, High power output, and positioning accuracy is high, moves
Step response is good, but impulse stroke is smaller.Piezoelectric inertia actuator has the characteristics that high-resolution, big stroke, but does not have clamp machine
Structure causes power output and output rigidity smaller, and positioning accuracy is low.
The content of the invention
In order to overcome the problems referred above, the present invention adopts the following technical scheme that：
A kind of novel linear piezoelectric actuator, the actuator is mainly by by leading screw, bearing screwed cap, torque motor and driving nut etc.
Composition, it is characterised in that：Bearing screwed cap, torque motor and driving nut are connected in turn by flexible clutch, are placed in
The inside of shell, drives the opposite side of nut to be equipped with piezoelectric stack, and leading screw is located at the center of actuator, through piezoelectric stack, drives
Dynamic nut, flexible clutch, torque motor and bearing screwed cap, one end that leading screw is located inside actuator are equipped with ball spline,
Piezoelectric stack and ball spline are placed in the inside of shell.
The helicoid of the leading screw and bearing screwed cap and driving nut carves angle less than 7 °.
It is an advantage of the invention that：The spiral clamping institution of the actuator need to only deflect moment of torsion, be not required to deflecting force, can be easily
There is provided deflection moment of torsion by traditional electromagnetic machine or ultrasound electric machine, have big stroke, high thrust, cut off self-lock it is low with cost
The features such as.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention.
Embodiment
As shown in Figure 1, a kind of novel linear piezoelectric actuator, the actuator is mainly by by leading screw 1, bearing screwed cap 2, torque
Motor 3 and driving nut 4 grade composition, bearing screwed cap 2, torque motor 3 and driving nut 4 are sequentially connected by flexible clutch 5
Together, the inside of shell 8 is placed in, the opposite side of driving nut 4 is equipped with piezoelectric stack 6, and leading screw 1 is located at the center of actuator,
It is located at through piezoelectric stack 6, driving nut 4, flexible clutch 5, torque motor 3 and bearing screwed cap 2, leading screw 1 inside actuator
One end be equipped with ball spline 7, piezoelectric stack 6 and ball spline 7 are placed in the inside of shell 8.
The helicoid of the leading screw 1 and bearing screwed cap 2 and driving nut 4 carves angle less than 7 °.
Operation principle is as follows：
During work, while after applying 3 start signal of 6 pumping signal of piezoelectric stack and torque motor, piezoelectric stack 6 starts to extend,
Driving nut 4 is pushed up upwards, driving nut 4 drives leading screw 1 to move upwards.During this, leading screw 1 drives bearing screwed cap 2 upward
Movement, therefore bearing screwed cap 2 is not subjected to load pressure, starts to rotate forward under the drive of torque motor 3, produces towards holding
The axial displacement in section direction.Because the pressure between driving nut 4 and piezoelectric stack 6 is very big, caused frictional force prevents
Driving nut 4 follows torque motor 3 to rotate.
Piezoelectric stack 6 continues to be elongated at maximum elongation position, continues to drive leading screw 1 to move upwards.During this, carrying
Nut 2 continues to rotate forward under the drive of torque motor 3, and until cycle loading end, driving nut 4 is equally because of itself and piezo stack
Frictional force between heap 6 is without following torque motor to rotate.
Claims (2)
1. a kind of novel linear piezoelectric actuator, the actuator is mainly by by leading screw（1）, bearing screwed cap（2）, torque motor（3）
And driving nut（4）Deng composition, it is characterised in that：Bearing screwed cap（2）, torque motor（3）With driving nut（4）Joined by flexibility
Axis device（5）It is connected in turn, is placed in shell（8）Inside, drive nut（4）Opposite side be equipped with piezoelectric stack（6）, silk
Thick stick（1）Positioned at the center of actuator, through piezoelectric stack（6）, driving nut（4）, flexible clutch（5）, torque motor（3）With
Bearing screwed cap（2）, leading screw（1）One end inside actuator is equipped with ball spline（7）, piezoelectric stack（6）And ball flower
Key（7）It is placed in shell（8）Inside.
A kind of 2. novel linear piezoelectric actuator according to claim 1, it is characterised in that：The leading screw（1）With carrying
Nut（2）And driving nut（4）Helicoid carve angle less than 7 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711025925.1A CN107947448A (en) | 2017-10-27 | 2017-10-27 | A kind of novel linear piezoelectric actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711025925.1A CN107947448A (en) | 2017-10-27 | 2017-10-27 | A kind of novel linear piezoelectric actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107947448A true CN107947448A (en) | 2018-04-20 |
Family
ID=61936586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711025925.1A Withdrawn CN107947448A (en) | 2017-10-27 | 2017-10-27 | A kind of novel linear piezoelectric actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107947448A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194020A (en) * | 2018-11-07 | 2019-01-11 | 扬州电力设备修造厂有限公司 | A kind of self-locking reliable high-precision electric push rod |
-
2017
- 2017-10-27 CN CN201711025925.1A patent/CN107947448A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194020A (en) * | 2018-11-07 | 2019-01-11 | 扬州电力设备修造厂有限公司 | A kind of self-locking reliable high-precision electric push rod |
| CN109194020B (en) * | 2018-11-07 | 2023-10-13 | 扬州电力设备修造厂有限公司 | High-precision electric push rod with reliable self-locking |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180420 |
|
| WW01 | Invention patent application withdrawn after publication |