CN209402437U - A kind of rotation piezoelectric rotary driver twice - Google Patents
A kind of rotation piezoelectric rotary driver twice Download PDFInfo
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- CN209402437U CN209402437U CN201920163106.1U CN201920163106U CN209402437U CN 209402437 U CN209402437 U CN 209402437U CN 201920163106 U CN201920163106 U CN 201920163106U CN 209402437 U CN209402437 U CN 209402437U
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- flexible hinge
- annulus
- parallelogram
- driving
- parallelogram flexible
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Abstract
The utility model relates to a kind of rotation piezoelectric rotary drivers twice, including fixed platform (1), piezoelectric stack (2), parallelogram flexible hinge a (3), rotating platform (4), pedestal (5), driving flexible hinge (6), mobile platform (7), parallelogram flexible hinge b (8), driving annulus (9), hold-down support (10), triangle microprotrusion (11).At parallelogram flexible hinge a (3), b (8) and triangle microprotrusion (11) collective effect, electric signal motivated in a duty cycle of the extension/contraction of piezoelectric stack (2), drive annulus (9) alternately by parallelogram flexible hinge a (3)/b (8) driving, the rotation twice for realizing rotating platform (4), improves the delivery efficiency of driver.
Description
Technical field
The utility model relates to a kind of rotation piezoelectric rotary drivers twice, belong to micro-nano precision actuation technical field.
Background technique
Along with the fast development in the fields such as precision and ultra-precision machining, electronics, biotechnology, accurate measurement, to micro-nano
Rice precision actuation technology requirement it is higher and higher, each research institution also actively to big stroke, high-precision piezoelectric actuator into
Row research.In existing big stroke, high-precision piezoelectric actuator, driving process can be usually divided into the piezoelectric stack elongation stage
With piezoelectric stack retraction stage, realized using the slow elongation of piezoelectric stack and snapback.In the process, pressure can only be passed through
Electricity stacks the elongation stage and realizes that driver rotates in the forward direction driving, and piezoelectric stack retraction stage can not be such that driver rotates in the forward direction,
Can even driver be made to retract, greatly reduce the delivery efficiency of driver.
Summary of the invention
In order to realize big stroke, it is high-precision improve the delivery efficiency of driver simultaneously, the utility model discloses one kind
Rotation piezoelectric rotary driver twice.
The utility model is achieved through the following technical solutions:
A kind of rotation piezoelectric rotary driver twice, including it is flexible including fixed platform, piezoelectric stack, parallelogram
Hinge a, rotating platform, pedestal, driving flexible hinge, mobile platform, parallelogram flexible hinge b, driving annulus, fixed branch
Seat, triangle microprotrusion；Pedestal is integrally machined with hold-down support, and annulus and rotating platform is driven integrally to turn to match and be mounted on fixation
On support, fixed platform, driving flexible hinge and mobile platform are integrally machined, and are fixedly mounted on pedestal by fixed platform
On；Parallelogram flexible hinge a, b of the changeable normal pressure between driving annulus are arranged symmetrically outer with driving annulus
Side and inside, and parallelogram flexible hinge a, b are on a mobile platform；It is suitable, counterclockwise when making rotating platform along Z axis rotation
The different triangle microprotrusion of coefficient of friction is set to parallelogram flexible hinge a, b and drives at the contact surface of annulus；?
Under parallelogram flexible hinge a, b and triangle microprotrusion collective effect, electric signal motivates the extension/contraction of piezoelectric stack
During one duty cycle, driving annulus is alternately driven by parallelogram flexible hinge a/b, realizes the two of rotating platform
Secondary rotation.
Detailed process is as follows: in piezoelectric stack elongation process, driving annulus is clockwise by parallelogram flexible hinge a
The frictional force in direction makes to drive annulus along up time greater than the anticlockwise frictional force by parallelogram flexible hinge b
Needle direction rotates θ；During piezoelectric stack shortens, driving annulus is rubbed by parallelogram flexible hinge b is clockwise
Power is wiped, is greater than by the anticlockwise frictional force of parallelogram flexible hinge a, makes that annulus is driven to continue along clockwise direction
β is rotated, the rotation twice for the rotating platform a cycle integrally assembled with driving annulus is completed.
During the piezoelectric stack elongation strain, mobile platform is moved along X-axis positive direction, is moved along Y-axis negative direction
Parallelogram flexible hinge a and driving annulus between normal pressure to be greater than the parallelogram moved along Y-axis positive direction flexible
Normal pressure between hinge b and driving annulus, resulting frictional force drives annulus rotate clockwise；Piezoelectric stack shortens deformation
In the process, mobile platform is moved along X-axis negative direction, the parallelogram flexible hinge b moved along Y-axis negative direction and driving annulus
Between normal pressure be greater than the normal pressure between parallelogram flexible hinge a that Y-axis positive direction moves and driving annulus, thus produce
Raw frictional force drives annulus continues to rotate clockwise.
The surface parallelogram flexible hinge a, b is provided with triangle microprotrusion, and triangle microprotrusion is non-central
Symmetric shape, inclined direction is consistent with parallelogram flexible hinge inclined direction, makes the coefficient of friction and normal pressure that are inclined to side
The both greater than other side；The triangle microprotrusion of the described driving annulus surfaces externally and internally setting respectively with parallelogram flexible hinge
B and the triangle microprotrusion of the parallelogram surface flexible hinge a setting are worked in coordination；During piezoelectric stack extension/contraction,
Annulus is driven alternately to be driven by parallelogram flexible hinge a/ parallelogram flexible hinge b, realization rotates twice.
The beneficial effects of the utility model are: driver is generated within the one action period using a piezoelectric stack,
It rotates twice, improves the delivery efficiency of driver.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The illustrative example and its explanation of the utility model do not constitute the improper limit to the utility model for explaining the utility model
It is fixed.
Fig. 1 show the overall structure diagram of the utility model；
Fig. 2 show the inside top figure of the utility model；
Fig. 3 show the working principle diagram of the utility model；
Fig. 4 show triangle between parallelogram flexible hinge a, b of the utility model and driving annulus contact surface
Microprotrusion enlarged drawing；
Specific embodiment
The detailed content and its specific embodiment of the utility model are further illustrated with reference to the accompanying drawing.
Referring to FIG. 1 to FIG. 4, present embodiment provides a kind of specific implementation of rotation piezoelectric rotary driver twice
Scheme.A kind of described rotation piezoelectric rotary driver twice, including include fixed platform (1), piezoelectric stack (2), in parallel
Quadrangle flexible hinge a (3), rotating platform (4), pedestal (5), driving flexible hinge (6), mobile platform (7), parallelogram
Flexible hinge b (8), driving annulus (9), hold-down support (10), triangle microprotrusion (11)；Pedestal (5) and hold-down support (10)
It is integrally machined, annulus (9) and rotating platform (4) is driven integrally to turn to match and be mounted on hold-down support (10), fixed platform (1),
Driving flexible hinge (6) and mobile platform (7) are integrally machined, and are fixedly mounted on pedestal (5) by fixed platform (1)；It can
Parallelogram flexible hinge a (3), the b (8) for changing the normal pressure between driving annulus (9) are arranged symmetrically and driving annulus
(9) outside and inside, and parallelogram flexible hinge a (3), b (8) are on mobile platform (7)；Make rotating platform (4)
Triangle microprotrusions (11) suitable, that coefficient of friction counterclockwise is different are set to parallelogram flexible hinge a when along Z axis rotation
(3), b (8) and driving annulus (9) contact surface at；In parallelogram flexible hinge a (3), b (8) and triangle microprotrusion
(11) under collective effect, during electric signal motivates a duty cycle of the extension/contraction of piezoelectric stack (2), annulus is driven
(9) rotation twice of rotating platform (4) alternately is realized by parallelogram flexible hinge a (3)/b (8) driving.
Detailed process is as follows: in piezoelectric stack (2) elongation process, driving annulus (9) by parallelogram flexible hinge a
(3) clockwise frictional force is greater than the anticlockwise frictional force by parallelogram flexible hinge b (8), makes to drive
Dynamic annulus (9) are rotated in the clockwise direction θ；During piezoelectric stack (2) shortens, driving annulus (9) is soft by parallelogram
Property hinge b (8) clockwise frictional force, be greater than by parallelogram flexible hinge a (3) anticlockwise friction
Power makes that annulus (9) is driven to continue to be rotated in the clockwise direction β, completes the rotating platform (4) integrally assembled with driving annulus (9)
The rotation twice of a cycle.
During described piezoelectric stack (2) elongation strain, mobile platform (7) is moved along X-axis positive direction, along Y-axis losing side
It is greater than to the normal pressure between the parallelogram flexible hinge a (3) and driving annulus (9) of movement and is put down along what Y-axis positive direction moved
Normal pressure between row quadrangle flexible hinge b (8) and driving annulus (9), resulting frictional force drives annulus (9) are clockwise
Rotation；Piezoelectric stack (2) shortens in deformation process, and mobile platform (7) is moved along X-axis negative direction, moves along Y-axis negative direction flat
It is soft that normal pressure between row quadrangle flexible hinge b (8) and driving annulus (9) is greater than the parallelogram moved along Y-axis positive direction
Property hinge a (3) and driving annulus (9) between normal pressure, resulting frictional force drives annulus (9) continues to rotate clockwise.
The parallelogram flexible hinge a (3), b (8) surface are provided with triangle microprotrusion (11), and triangle is micro-
Raised (11) non-centrosymmetry shape, inclined direction is consistent with parallelogram flexible hinge inclined direction, makes to be inclined to rubbing for side
It wipes coefficient and normal pressure is both greater than the other side；The triangle microprotrusion (11) point of driving annulus (9) the surfaces externally and internally setting
The triangle microprotrusion (11) not being arranged with parallelogram flexible hinge b (8) and (3) surface parallelogram flexible hinge a
It works in coordination；During piezoelectric stack (2) extension/contraction, driving annulus (9) is alternately by parallelogram flexible hinge a
(3)/parallelogram flexible hinge b (8) driving, realization rotate twice.
Claims (4)
1. a kind of rotation piezoelectric rotary driver twice, it is characterised in that: flexible hinge is driven using a piezoelectric stack,
In one duty cycle of piezoelectric stack extension/contraction, the rotation twice of rotating platform is realized；Specific structure includes fixed platform
(1), piezoelectric stack (2), parallelogram flexible hinge a (3), rotating platform (4), pedestal (5), driving flexible hinge (6), shifting
Moving platform (7), parallelogram flexible hinge b (8), driving annulus (9), hold-down support (10), triangle microprotrusion (11)；Bottom
Seat (5) is integrally machined with hold-down support (10), and annulus (9) and rotating platform (4) is driven integrally to turn to match and be mounted on hold-down support
(10) on, fixed platform (1), driving flexible hinge (6) and mobile platform (7) are integrally machined, and fixed by fixed platform (1)
It is mounted on pedestal (5)；Parallelogram flexible hinge a (3), the b (8) of the changeable normal pressure between driving annulus (9)
It is arranged symmetrically the outside and inside with driving annulus (9), and parallelogram flexible hinge a (3), b (8) are in mobile platform
(7) on；Triangle microprotrusions (11) suitable, that coefficient of friction counterclockwise is different are set to flat when making rotating platform (4) along Z axis rotation
Row quadrangle flexible hinge a (3), b (8) and driving annulus (9) contact surface at；In parallelogram flexible hinge a (3), b
(8) and under triangle microprotrusion (11) collective effect, electric signal motivates a work week of the extension/contraction of piezoelectric stack (2)
During phase, driving annulus (9) alternately by parallelogram flexible hinge a (3)/b (8) driving, is realized and driving annulus (9)
The rotation twice of the rotating platform (4) integrally assembled.
2. a kind of rotation piezoelectric rotary driver twice according to claim 1, it is characterised in that: in one cycle
Parallelogram flexible hinge a (3), b (8) driven driving annulus (9) rotation, realize turning twice for rotating platform (4)
It is dynamic；In piezoelectric stack (2) elongation process, driving annulus (9) is rubbed by parallelogram flexible hinge a (3) is clockwise
Power is wiped, the anticlockwise frictional force by parallelogram flexible hinge b (8) is greater than, makes to drive annulus (9) along clockwise
Direction rotates θ；During piezoelectric stack (2) shortens, driving annulus (9) is square clockwise by parallelogram flexible hinge b (8)
To frictional force, be greater than by parallelogram flexible hinge a (3) anticlockwise frictional force, make that annulus (9) is driven to continue
It is rotated in the clockwise direction β, completes the rotation twice of rotating platform (4) a cycle integrally assembled with driving annulus (9).
3. a kind of rotation piezoelectric rotary driver twice according to claim 1, it is characterised in that: the piezo stack
During heap (2) elongation strain, mobile platform (7) is moved along X-axis positive direction, and the parallelogram moved along Y-axis negative direction is soft
Property hinge a (3) and driving annulus (9) between normal pressure be greater than the parallelogram flexible hinge b (8) that moves along Y-axis positive direction
With the normal pressure between driving annulus (9), resulting frictional force drives annulus (9) is rotated clockwise；Piezoelectric stack (2) shortens
In deformation process, mobile platform (7) is moved along X-axis negative direction, the parallelogram flexible hinge b (8) moved along Y-axis negative direction
Normal pressure between driving annulus (9) is greater than the parallelogram flexible hinge a (3) and driving annulus moved along Y-axis positive direction
(9) normal pressure between, resulting frictional force drives annulus (9) continue to rotate clockwise.
4. a kind of rotation piezoelectric rotary driver twice according to claim 1, it is characterised in that: described parallel four
Side shape flexible hinge a (3), b (8) surface are provided with triangle microprotrusion (11), triangle microprotrusion (11) non-centrosymmetry shape
Shape, inclined direction is consistent with parallelogram flexible hinge inclined direction, is both greater than the coefficient of friction for being inclined to side and normal pressure
The other side；The triangle microprotrusion (11) of described driving annulus (9) the surfaces externally and internally setting respectively with parallelogram flexible hinge
Chain b (8) and the triangle microprotrusion (11) of (3) surface parallelogram flexible hinge a setting are worked in coordination；Piezoelectric stack (2)
During extension/contraction, driving annulus (9) is alternately by parallelogram flexible hinge a (3)/parallelogram flexible hinge b
(8) it drives, realization rotates twice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920163106.1U CN209402437U (en) | 2019-01-30 | 2019-01-30 | A kind of rotation piezoelectric rotary driver twice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920163106.1U CN209402437U (en) | 2019-01-30 | 2019-01-30 | A kind of rotation piezoelectric rotary driver twice |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209402437U true CN209402437U (en) | 2019-09-17 |
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ID=67899219
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920163106.1U Expired - Fee Related CN209402437U (en) | 2019-01-30 | 2019-01-30 | A kind of rotation piezoelectric rotary driver twice |
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| Country | Link |
|---|---|
| CN (1) | CN209402437U (en) |
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2019
- 2019-01-30 CN CN201920163106.1U patent/CN209402437U/en not_active Expired - Fee Related
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Granted publication date: 20190917 Termination date: 20200130 |
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