CN208226897U - A kind of differential rotary piezoelectric stepper motor - Google Patents
A kind of differential rotary piezoelectric stepper motor Download PDFInfo
- Publication number
- CN208226897U CN208226897U CN201820281246.4U CN201820281246U CN208226897U CN 208226897 U CN208226897 U CN 208226897U CN 201820281246 U CN201820281246 U CN 201820281246U CN 208226897 U CN208226897 U CN 208226897U
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- driving
- mover
- driving foot
- foot
- shaft
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Abstract
The utility model discloses a kind of differential rotary piezoelectric stepper motors, including driving assembly, mover, pre-tightening mechanism and pedestal, the pre-tightening mechanism includes the shaft affixed with the pedestal, the mover is fixedly connected with the shaft, the driving component one end connects the pedestal, and the other end hugs the mover by the pre-tightening mechanism.The driving component includes the first driving foot, the second driving foot and third driving foot being distributed in a ring around shaft, the first driving foot, the second driving foot and third driving foot all have displacement converted mechanism, the displacement converted mechanism is equipped with stacked piezoelectric ceramics, and makes the mover rotation to drive the shaft to rotate by displacement converted mechanism described in the stacked piezoelectric ceramic driving.The differential rotary piezoelectric stepper motor of the utility model is used to solve the problems, such as that existing stepper motor presence to cut off self-lock, high thrust is difficult to take into account with high-precision.
Description
Technical field
The utility model relates to Precision Piezoelectric braking technology fields, and in particular to a kind of differential rotary piezoelectric stepper motor.
Background technique
The mode for realizing precision stepper motor driving at present is mainly that Inchworm type precision actuation and inertia friction drive two kinds
Mode.Inchworm type precision actuation is capable of providing biggish precision and thrust, but since structure is complicated leads to driving frequency for it
Smaller, small so as to cause driving speed, the complexity of structure also results in control difficulty and increases, and installation accuracy is difficult to control, in addition, ruler
The cooperation serious wear of earwig type precision actuation eventually leads to poor contact, performance reduction；The knot for the inertial piezoelectric driving device that rubs
Structure is easier to compared with simple, control, driving speed is larger, but is led since friction inertial piezoelectric driving device lacks clamping mechanism
Cause pretightning force insufficient, thrust is small.
Stacked piezoelectric ceramics are because performance is advantageous, the promotion of manufacturing process in recent years, the realization of large-scale production, increasingly
More is used on precision actuation.Stacked piezoelectric ceramics have the stabilization output displacement of nano-precision, and have linear
Good, easy to control, high resolution, response frequency be high, fever less, without magnetic disturbance, noise is low the features such as, therefore set using the structure
The piezoelectric actuator of meter has unique advantage.In recent years, Precision Piezoelectric actuation techniques have become domestic and international precision actuation field
One of research hotspot.But current non-resonant piezoelectric motor main problem is the hesitation shadow of stacked piezoelectric ceramics
It rings, the hysterisis error of piezoelectric motor is caused to accumulate and increase its position error, can solve the biped driving piezoelectric straight line of the problem
There is also high thrusts and high-precision to be difficult to the problem of taking into account for motor.
Utility model content
The purpose of the utility model is to overcome the deficiencies of the prior art, provide a kind of differential rotary piezoelectric stepper motor,
The advantages of comprehensively utilizing Precision Piezoelectric driving and friction inertial piezoelectric driving, solution cuts off self-lock, high thrust is difficult to high-precision
The problem of taking into account.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of differential rotary piezoelectric stepper motor, including driving assembly, mover, pre-tightening mechanism and pedestal, the pretightening machine
Structure includes the shaft affixed with the pedestal, and the mover is fixedly connected with the shaft, described in the connection of the driving component one end
Pedestal, the other end hug the mover by the pre-tightening mechanism；
The driving component includes the first driving foot, the second driving foot and the third driving being distributed in a ring around shaft
Foot, the first driving foot, the second driving foot and third driving foot all have displacement converted mechanism, set on the displacement converted mechanism
There are stacked piezoelectric ceramics, and makes the mover rotation to drive by displacement converted mechanism described in the stacked piezoelectric ceramic driving
State shaft rotation.
In preferred embodiment, the first driving foot, the second driving foot and third driving foot also all include wearable ceramic ball,
The wearable ceramic ball is arranged between the displacement converted mechanism and mover and displacement converted mechanism described in contact and dynamic up and down
Son.
In preferred embodiment, the pre-tightening mechanism further includes spring, metal ring and the hexagonal spiral shell that shaft one end is arranged in
Mother, the spring are set in shaft, and the metal ring is connected with the spring.
In preferred embodiment, the first driving foot, the second driving foot and third drive boll of foot girth spaced set around the shaft.
In preferred embodiment, the mover is antifriction metal (AFM) disk.
In preferred embodiment, the wearable ceramic ball of the first driving foot, the second driving foot and third driving foot is shape
The identical sphere of size.
Compared with the prior art, the utility model has the following beneficial effects:
(1) it is designed in the piezoelectricity stepper motor of the utility model using three driving foots, between opposite mover of three drivings foots etc.
Every arrangement, three driving foots directly hug mover by pre-tightening mechanism, and the telescopic action of three driving foots is passed by displacement converted mechanism
It is delivered to mover, rotates mover；After to three driving foot input three-phase voltage control signals, differential actuation can be realized, thus
Realize that high thrust is taken into account with high-precision.
(2) three drivings of piezoelectricity stepper motor described in the utility model are pressed on mover by pre-tightening mechanism always enough
On, this makes motor have the ability to cut off self-lock, and three driving foots use the wearable ceramic ball of hard high-wearing feature
It is contacted with pre-tightening mechanism, this will greatly improve the service life of motor.
(3) the utility model overall structure is simple, improves the assembly efficiency of motor, and is easily achieved mass production.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is the top view of the utility model；
Fig. 2 is the side view of the utility model.
Specific embodiment
Embodiment:
Please refer to Fig. 1 and Fig. 2, in preferred embodiment, a kind of differential rotary piezoelectric stepper motor, including it is driving assembly 1, dynamic
Son 2, pre-tightening mechanism 3 and pedestal 4.
In specific structure, the pre-tightening mechanism 3 includes the shaft 31 affixed with the pedestal, and the mover 2 is fixedly connected
The shaft 31,1 one end of the driving component connect the pedestal 4, and the other end hugs the mover by the pre-tightening mechanism 3
2。
Specifically, the driving component 1 includes that the first driving foot A of equidistantly distributed, second drive in a ring around shaft
Action spot B and third drive foot C, and one end of the first driving foot A and the pedestal 4 are connected, and the other end passes through the pretightening machine
Structure 3 hugs the mover 2；One end of the second driving foot B and the pedestal 4 are connected, and the other end passes through the pre-tightening mechanism 3
Hug the mover 2；One end of the third driving foot C and the pedestal 4 are connected, and the other end is tight by the pre-tightening mechanism 3
Embrace the mover 2.
First driving foot A, the second driving foot B and third driving foot C all have displacement converted mechanism 11, and the displacement turns
Structure 11 of changing planes is equipped with stacked piezoelectric ceramics 111, and is made by the 11 driving displacement converted mechanism 11 of stacked piezoelectric ceramics
The rotation of mover 2 is to drive the shaft 31 to rotate.
In the present embodiment, the first driving foot A, the second driving foot B and third driving foot C also include wearable ceramic ball
12, the wearable ceramic ball 12 is arranged between the displacement converted mechanism 11 and mover 2 and is displaced conversion described in contact up and down
Mechanism 11 and mover 2.
In the present embodiment, the pre-tightening mechanism 3 further includes that spring 32, hex nut 33 and metal ring (do not show in figure
Out), the hex nut 33 is arranged in 31 one end of shaft, and the bullet, 32 are set in shaft 31, the metal ring 34 and institute
Spring 32 is stated to be connected.The displacement converted mechanism of the first driving foot A is connected by wearable ceramic ball with metal ring, described
The displacement converted mechanism of second driving foot B is connected by wearable ceramic ball with metal ring；The displacement of the third driving foot C turns
Structure of changing planes is connected by wearable ceramic ball with metal ring, and the spring 32 is connected with metal ring to be moved in shaft.
The first driving foot A, the second driving foot B and the wearable ceramic ball on third driving foot C are that shape size is identical
Sphere.
By the size of precompression provided by the rotation adjustable pre-tightening mechanism 3 of hex nut 33, metal ring can
It is applied to precompression uniformly on three driving foots, the pre-tightening mechanism 3 compresses the displacement interpreter by metal ring
Wearable ceramic ball on structure makes the first driving foot A, the second driving foot B, third driving foot C pass through the displacement interpreter
Structure hugs the mover 2, and telescopic action is transmitted to mover 2 by the displacement converted mechanism, rotates mover 2.To three
Driving foot one differential wave of input, achieves differential actuation.During entire driving, drive mode copies inertia friction
The driving of formula；Differential actuation can satisfy the requirement of big stroke.
The utility model embodiment utilizes the inverse piezoelectric effect of stacked piezoelectric ceramics, the voltage applied to stacked piezoelectric ceramics
Increase, the elongation of stacked piezoelectric ceramics；Voltage reduces, stacked piezoelectric ceramics retraction.Therefore, giving a voltage signal may be implemented
The stretching motion of stacked piezoelectric ceramics may be implemented axial displacement variation, change in displacement be transferred to mover by fricting movement
The movement of mover can be realized.The motion range very little of single stacked piezoelectric ceramics, only tens microns, frictional force also very little,
Will be in parallel on multiple stacked piezoelectric ceramic machineries, it connects on circuit, gives the driving signal control of a differential actuation, realize step
Stroke into driving is accumulated, it can realizes a wide range of driving；The frictional force individually driven is very limited, the joint of multiple driving foots
Using the output driving of high thrust can be realized with increasing friction force.
Further, the utility model realizes Differential Driving control using three driving foots.Differential actuation works normally
Requirement: three drivings are contacted in a manner of face contact with mover respectively enough, contact material, contact area, the way of contact and in advance
Clamp force is identical, and the driving frictional force of single only foot is less than the stiction of mover, the sum of the driving frictional force of three driving foots
Greater than the stiction of mover；Three drive foot successively actuation, and mover is stationary in this process；It is all stretched to three driving foots
It bounces back simultaneously after length, total driving force at this time is greater than the stiction of mover, and mover rotates one under the action of total driving force
Step pitch, three driving foots are successively restored to former length again, and at this time mover remains stationary under effect of inertia, repeats above-mentioned movement, can
To realize the continuous rotation steps of mover.
The above, only the utility model preferred embodiment, therefore, it cannot be limited according to, and the utility model is implemented
It is practical new to should still belong to this for range, i.e., equivalent changes and modifications made according to the scope of the patent of the utility model and the content of the manual
In the range of type covers.
Claims (6)
1. a kind of differential rotary piezoelectric stepper motor, it is characterised in that: including driving assembly, mover, pre-tightening mechanism and pedestal, institute
Stating pre-tightening mechanism includes the shaft affixed with the pedestal, and the mover is fixedly connected with the shaft, the driving component one end
The pedestal is connected, the other end hugs the mover by the pre-tightening mechanism；
The driving component includes the first driving foot, the second driving foot and third driving foot being distributed in a ring around shaft, should
First driving foot, the second driving foot and third driving foot all have displacement converted mechanism, and the displacement converted mechanism is equipped with folded
It is laminated electroceramics, and makes the mover rotation to drive described turn by displacement converted mechanism described in the stacked piezoelectric ceramic driving
Axis rotation.
2. a kind of differential rotary piezoelectric stepper motor according to claim 1, it is characterised in that: the first driving foot,
Second driving foot and third driving foot also all include wearable ceramic ball, and the wearable ceramic ball is arranged in the displacement converted mechanism
Between mover and up and down displacement converted mechanism and mover described in contact.
3. a kind of differential rotary piezoelectric stepper motor according to claim 1, it is characterised in that: the pre-tightening mechanism also wraps
Include spring, metal ring and the hex nut that shaft one end is set, the spring is set in shaft, the metal ring with
The spring is connected.
4. a kind of differential rotary piezoelectric stepper motor according to claim 1, it is characterised in that: the first driving foot,
Second driving foot and third drive boll of foot girth spaced set around the shaft.
5. a kind of differential rotary piezoelectric stepper motor according to claim 1, it is characterised in that: the mover is wear-resisting gold
Belong to disk.
6. a kind of differential rotary piezoelectric stepper motor according to claim 2, it is characterised in that: the first driving foot,
The wearable ceramic ball of second driving foot and third driving foot is the identical sphere of shape size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820281246.4U CN208226897U (en) | 2018-02-28 | 2018-02-28 | A kind of differential rotary piezoelectric stepper motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820281246.4U CN208226897U (en) | 2018-02-28 | 2018-02-28 | A kind of differential rotary piezoelectric stepper motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208226897U true CN208226897U (en) | 2018-12-11 |
Family
ID=64530519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820281246.4U Withdrawn - After Issue CN208226897U (en) | 2018-02-28 | 2018-02-28 | A kind of differential rotary piezoelectric stepper motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208226897U (en) |
-
2018
- 2018-02-28 CN CN201820281246.4U patent/CN208226897U/en not_active Withdrawn - After Issue
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181211 Effective date of abandoning: 20230620 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20181211 Effective date of abandoning: 20230620 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |