CN208862771U - A kind of hollow piezoelectric actuator - Google Patents
A kind of hollow piezoelectric actuator Download PDFInfo
- Publication number
- CN208862771U CN208862771U CN201821643306.9U CN201821643306U CN208862771U CN 208862771 U CN208862771 U CN 208862771U CN 201821643306 U CN201821643306 U CN 201821643306U CN 208862771 U CN208862771 U CN 208862771U
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- shell
- rotor
- stator
- pedestal
- upper cover
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Abstract
A kind of hollow piezoelectric actuator, including pedestal, upper cover and shell, pedestal and upper cover are provided with the inner hole to form connecting shaft space；Rotor is fixedly mounted in the groove of shell, and rotor is towards pasting friction material in the one side of stator；Stator is annular, and has the epitaxy part positioned at base upper surface；Piezoelectric ceramic piece is affixed on the upper surface of stator；It is bolted between upper cover and pedestal.This actuator has the advantages that small in size, smooth running, suitable for being architectural limitation, needs hollow to be laid out the occasion that uses.
Description
Technical field
The utility model relates to piezoelectric actuator technical fields, more particularly, to a kind of hollow piezoelectric actuator.
Background technique
As a kind of driving device, the working principle of piezoelectric actuator is the inverse piezoelectric effect using piezoelectric ceramic piece, will
The electric energy of alternation is converted into kinetic energy on stator particle, to generate the micro breadth oscillation in supersonic range, and by stator and rotor it
Between rubbing action the micro breadth oscillation of stator is converted to the rotary motion of rotor, and then output power, driving load, there is knot
Structure simple (coil), the high-torque slow-speed of revolution, energy density is big, fast response time, positioning accuracy are high, electromagnetism interference is strong, disconnected
The advantages that electricity is self-locking.
As one kind of piezoelectric actuator, hollow piezoelectric actuator is particularly suitable for the field that space layout has particular/special requirement
It closes.But in the prior art hollow piezoelectric actuator due to its structure design on defect, be unable to satisfy lightness, miniaturization,
The needs of micromation.
Summary of the invention
The purpose of the utility model is to overcome disadvantages existing in the prior art, provide a kind of hollow piezoelectric actuator,
Stator, the rotor etc. of the actuator are arranged in the installation space that pedestal, upper cover and shell are formed, and rotor is mounted on shell
Groove in, further reduce the volume of actuator, be conducive to the micromation of actuator, the technical solution adopted is that: it is a kind of
Hollow piezoelectric actuator, it is characterised in that；The actuator includes pedestal, upper cover and shell, and the pedestal and upper cover are provided with
Form the inner hole in connecting shaft space；Rotor is fixedly mounted in the groove of shell, and rotor rubs towards pasting in the one side of stator
Wipe material；Stator is annular, and has the epitaxy part positioned at base upper surface；Piezoelectric ceramic piece is affixed on the upper surface of stator；Institute
It states and is bolted between upper cover and pedestal.
Further, wave spring is set between the lower part of the rotor, rotor and shell.Wave spring squeezes rotor, is rotor
Precompression is provided, to guarantee that actuator steadily operates.
Further, ring-shaped rotor card turns in the groove of shell.To cooperate the overall structure of hollow actuator, and reduce
Rotor design is ring-shaped rotor and connected in the shell by the axial width of actuator.
Further, the stator is the annular stator for cutting with tooth socket.Tooth socket is uniformly distributed on stator surface, is conducive to
The increase of vibration amplitude.
Further, bearing I is housed between the pedestal and shell, bearing II is housed between the shell and upper cover.
The utility model has the beneficial effects that: the rotor of this actuator is snapably secured in shell and shell is driven to rotate,
The micromation of actuator can be achieved；Wave spring applies precompression to rotor, so that rotor is flat by the precompression, actuator balanced
Steady operating；Bearing I and bearing II are loaded on respectively at the ladder position of interior of shell, and duplex bearing ensure that rotor steadily operates；This
Actuator has the advantages that small in size, smooth running, suitable for being architectural limitation, needs hollow to be laid out the occasion that uses.
Detailed description of the invention
Attached drawing 1 is the utility model structure diagram, and attached drawing 2 is the top view of attached drawing 1, and attached drawing 3 is rotor structure signal
Figure, attached drawing 4 is shell mechanism schematic diagram, wherein 1- pedestal；2- shell；3- bearing I；4- wave spring；5- rotor；6- friction material
Material；7- stator, 71 be epitaxy part；8- piezoelectric ceramic piece；9- bearing II；10- bearing block；11- upper cover；12- hexagon socket head cap screw.
Specific embodiment
With reference to the accompanying drawing, specific embodiment of the present utility model is illustrated.The utility model discloses one kind
Hollow piezoelectric actuator, the actuator include pedestal 1, upper cover 11 and shell 2, and pedestal 1 and upper cover 11 are provided with to form connecting shaft
With the inner hole in space.Connecting shaft (not shown) is placed in inner hole, and is connect with rotor 5 by connector (such as key), with
The power of rotor 5 is transferred to connecting shaft.
Stator 7 is the annular stator for being machined with tooth socket, and tooth socket is evenly spaced on the surface of stator 7, to increase vibration width
Value, size and 5 diameter of rotor of 7 diameter of stator match.Stator 7 has the epitaxy part 71 positioned at 1 upper surface of pedestal, pressure
Electroceramics piece 8 is affixed on the upper surface of stator 7.Piezoelectric ceramic piece 8 is annular, in this way setting piezoelectric ceramic piece 8, generates stator 7
The displacement of axial and circumferential both direction.
The fixation of stator 7 is consolidated between upper cover 11 and pedestal 1 by soket head cap screw bolt 12 by means of upper cover 11 and pedestal 1
It is common after fixed to squeeze stator 7, with fixed stator 7.
The rotor 5 of annular is fixedly mounted in the groove of shell 2, and rotor 5 has there are four equally distributed semi-cylindrical hill,
Rotor 5 is tightly bonded between rotor 5 and stator 7 by friction material 6 towards stickup friction material 6 in the one side of stator 7.Turn
The lower part of son 5 sets wave spring 4 between rotor 5 and shell 2, and wave spring 4 is installed on pedestal 1, and it is pre- that wave spring 4 is that rotor 5 provides
Pressure can make 5 uniform force of rotor, to make actuator smooth running.
Pedestal 1 is hollow cylinder, and inner hole is circle, and the diameter matching of size and connecting shaft, the outer surface of pedestal 1 is ladder
Shape outer surface forms installation cavity, to accommodate stator 7, rotor 5, piezoelectric ceramic piece 8 between pedestal 1 and shell 2, upper cover 11
Equal components.Bearing 3 I is set between pedestal 1 and shell 2, and bearing II 9 and bearing block 10 are set between shell 2 and upper cover 11.Bearing II 9
Inner ring is stuck in 11 outside face of upper cover, and II 9 outer ring of bearing is equipped with bearing block 10, and bearing block 10 is stuck in the ladder-like position of shell 2.
Upper cover 11 is the hollow cylinder that an inner hole is round hole, institute's making circular hole in the diameter and pedestal 1 of the round hole
Diameter is identical.In the present embodiment, upper cover 11 opens three uniformly distributed bolts hole.Pedestal 1 opens three uniformly distributed blind holes, and and upper cover
11 screw holes that open up are corresponding.Upper cover 11 and pedestal 1 are linked to be an entirety by three hexagon socket head cap screws 12.Upper cover 11 opens up one
Arc narrower bore is used for cabling, saves design space.It designs into a ladder in 11 outside face of upper cover.
It is arranged inside shell 2 into a ladder, 2 top ladder of shell is used to support bearing block 10, and 2 lower step of shell is used for
Support the 3 outer diameter position of bearing.
The working principle of this actuator are as follows: piezoelectric ceramic piece 8 is a kind of letter that can mutually convert mechanical energy and electric energy
Ceramic material is ceased, there is piezoelectricity.Piezoelectric ceramic piece 8 under mechanical stress effect, is caused internal positive and negative using its material
Charge-site relative displacement and polarize so that material ends surface there is the opposite bound charge of symbol i.e. piezoelectric effect and
Production has sensitive characteristic.Piezoelectric material can generate electric field because of mechanically deform, and mechanical become can also be generated because of electric field action
Shape, hollow piezoelectric actuator are the inverse piezoelectric effects using piezoelectric ceramic piece 8, i.e., apply voltage, piezoelectricity pottery to piezoelectric ceramic piece 8
Tile 8 generates mechanical stress, and electric energy is converted into mechanical energy.When high frequency electrical signal is added on piezoelectric ceramic piece 8, then high frequency sound is generated
Signal (mechanical oscillation) can be such that stator 7 vibrates to the voltage of the logical upper alternation of piezoelectric ceramic piece 8.After stator 7 is fixed, vibration can be passed
Passing rotor 5 rotates rotor 5, so that shell 2 be driven to rotate, connecting shaft is fixedly connected with shell 2, can drive connecting shaft
Rotation, power is conveyed outward.
Certainly, above description is not limitation of the utility model, and the utility model is also not limited to the example above, this skill
The variations, modifications, additions or substitutions that the those of ordinary skill in art field is made in the essential scope of the utility model, also belong to
In the protection scope of the utility model.
Claims (6)
1. a kind of hollow piezoelectric actuator, it is characterised in that；The actuator includes pedestal, upper cover and shell, the pedestal and
Upper cover is provided with the inner hole to form connecting shaft space；Rotor is fixedly mounted in the groove of shell, rotor towards stator one
Friction material is pasted on face；Stator is annular, and has the epitaxy part positioned at base upper surface；Piezoelectric ceramic piece is affixed on stator
Upper surface；It is bolted between the upper cover and pedestal.
2. actuator described in accordance with the claim 1, it is characterised in that: set wave between the lower part of the rotor, rotor and shell
Unrestrained spring.
3. actuator described in accordance with the claim 1, it is characterised in that: ring-shaped rotor card turns in the groove of shell.
4. actuator described in accordance with the claim 1, it is characterised in that: the stator is the annular stator for cutting with tooth socket.
5. actuator described in accordance with the claim 1, it is characterised in that: bearing I is housed between the pedestal and shell.
6. actuator described in accordance with the claim 1, it is characterised in that: bearing II is housed between the shell and upper cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821643306.9U CN208862771U (en) | 2018-10-11 | 2018-10-11 | A kind of hollow piezoelectric actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821643306.9U CN208862771U (en) | 2018-10-11 | 2018-10-11 | A kind of hollow piezoelectric actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208862771U true CN208862771U (en) | 2019-05-14 |
Family
ID=66420630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821643306.9U Active CN208862771U (en) | 2018-10-11 | 2018-10-11 | A kind of hollow piezoelectric actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208862771U (en) |
-
2018
- 2018-10-11 CN CN201821643306.9U patent/CN208862771U/en active Active
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