CN215186503U - Double piezoelectric ceramic inertia drive type micro-displacement motor - Google Patents
Double piezoelectric ceramic inertia drive type micro-displacement motor Download PDFInfo
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- CN215186503U CN215186503U CN202121403911.0U CN202121403911U CN215186503U CN 215186503 U CN215186503 U CN 215186503U CN 202121403911 U CN202121403911 U CN 202121403911U CN 215186503 U CN215186503 U CN 215186503U
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- amplification
- displacement motor
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Abstract
The utility model provides a two piezoceramics inertia drive formula micrometric displacement motors is equipped with the mechanism of amplification respectively at inside both ends of shell, is equipped with piezoelectricity in the mechanism of amplification and piles up, is connected with the slide rail between two mechanisms of amplification, and the slide rail can be by the mechanism drive of amplification reciprocal vibration between two mechanisms of amplification to the line direction between slip direction in the slide rail and two mechanisms of amplification parallels, and sliding connection has the slider on the slide rail, and has frictional force between slider and the slide rail. High-frequency alternating voltages in opposite directions are applied to the piezoelectric stacks at the two ends, and the small mechanical deformation of the piezoelectric stacks is reversed and amplified by the amplifying mechanism, so that the slide rail connected in the middle is promoted to generate slow-advancing and fast-retreating reciprocating oscillation relative to the shell, and finally, the slide block is directionally moved under the action of inertia and friction force to achieve the purpose of linear driving, and a novel linear driving motor is formed.
Description
Technical Field
The utility model belongs to the technical field of accurate displacement drive, concretely relates to two piezoelectric ceramic inertia drive formula micro displacement motors.
Background
The micron/nanometer precision moving platform has wide application in the fields of biological medicine, physical electronics, chemical materials and the like, and is mainly used for bearing the tasks of fine transportation or measurement and the like of tiny objects. The above task requires a precise mobile platform with sufficient output force and large output rigidity, and the conventional driver can not meet the requirement, so that a new type of micro driver needs to be developed.
The piezoelectric material is a crystalline material which generates a voltage between two end faces when subjected to a pressure, and conversely, the piezoelectric material can also generate expansion or contraction deformation by applying a voltage between the two end faces of the piezoelectric material, and the phenomenon is an inverse piezoelectric effect. Therefore, the electric energy can be converted into mechanical energy by utilizing the inverse piezoelectric effect of the piezoelectric material, so that the driver is manufactured to output mechanical motion outwards. The driver based on piezoelectric material makes has advantages such as inertia is little, the response is fast, resolution ratio height, can satisfy above-mentioned micro actuator's requirement, consequently the utility model discloses will be based on the novel micro actuator who is used for driving accurate moving platform of piezoelectricity drive technology development.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a two piezoelectric ceramic inertia drive formula micro displacement motors for solve the drive problem of high accuracy displacement.
The utility model discloses a following technical means realizes above-mentioned technical purpose.
A dual piezoelectric ceramic inertia drive type micro-displacement motor is characterized in that amplification mechanisms are respectively arranged at two ends inside a shell, piezoelectric stacks are arranged in the amplification mechanisms, input voltages of the two piezoelectric stacks are alternating voltages, and the directions of the two input voltages are opposite at the same time; a sliding rail is connected between the two amplifying mechanisms, the sliding rail can be driven by the amplifying mechanisms to reciprocate between the two amplifying mechanisms, and a sliding block is movably connected to the sliding rail.
Further, the amplifying mechanism comprises two supporting parts, two strain parts are connected between the two supporting parts and are respectively located on two sides of the supporting parts, the strain part on one side is connected with the shell, and the strain part on the other side is connected with the sliding rail.
Further, the two ends of the piezoelectric stack are connected with the two supporting parts through the wedge-shaped column and the wedge-shaped block respectively, one end of the wedge-shaped column is connected with the end face of the piezoelectric stack, the inclined face of the other end of the wedge-shaped column is in sliding fit with the wedge-shaped block, the bottom face of the wedge-shaped block abuts against the end face of the supporting part, and the wedge-shaped block is connected with the supporting parts through the bolts on the side faces.
Further, the slider comprises U-shaped piece and apron, and wherein the U-shaped piece joint is on the slide rail, and the apron passes through the bolt to be connected with breach one side of U-shaped piece.
Furthermore, a ceramic piece is arranged between the sliding block and the sliding rail, and the length of the ceramic piece is equal to the stroke length of the sliding block.
Furthermore, a groove is formed in the surface of one side of the sliding rail, and the ceramic plate is clamped through the groove.
Furthermore, the shell is of a square annular structure, and the two amplifying mechanisms are respectively and symmetrically connected to two ends of the inner annular surface of the shell.
Further, the input voltages of the two piezoelectric stacks are alternating voltages, and the directions of the two input voltages are opposite at the same time.
The utility model has the advantages that:
(1) the utility model provides a two piezoceramics inertia drive formula micrometric displacement motors, pile up through the piezoelectricity for both ends and apply opposite direction's high frequency alternating voltage, the small mechanical deformation switching-over that piles up piezoelectricity is enlargied by the mechanism of amplification again, thereby make the relative shell of slide rail in the middle of connecting take place the reciprocating vibration of small range, and the change rate through control alternating voltage, make in the slide rail vibration towards the translation rate of a direction very fast, and the translation rate of another direction is slower, thereby its upper sliding block is because of the combined action of inertial force and frictional force, and relative shell produces small displacement, and along with the accumulation of small displacement, finally show the directional removal for the slider in macroscopical, reach sharp driven purpose, constitute a novel linear driving motor.
(2) The utility model discloses among the little displacement motor of two piezoceramics inertia drive formula, piezoelectricity piles up and the amplifying mechanism of driven and slide rail all is the high frequency motion that the range is minimum, and consequently the slider is very little for the removal step of shell, simultaneously including the rapid characteristics of piezoelectric material response, the translation position that the slider of motor output was regarded as the story can reach high control accuracy.
(3) The utility model discloses two piezoceramics inertia drive formula displacement motor is simple structure compactness, especially has outstanding advantage in thickness, can adapt to the requirement of multiple different accurate moving platform on spatial arrangement.
Drawings
FIG. 1 is a structural diagram of a dual piezoelectric ceramic inertia-driven micro-displacement motor of the present invention;
FIG. 2 is a structural diagram of a motor housing part according to the present invention;
fig. 3 is a top view of the dual piezoelectric ceramic inertia driven micro-displacement motor of the present invention;
FIG. 4 is a schematic diagram of the amplifying mechanism and the slide rail according to the present invention;
fig. 5 is a schematic view of the working process of the motor of the present invention.
Reference numerals:
1-a housing; 2-an amplifying mechanism; 21-a support part; 22-a strain section;
3-a slide rail; 4-a piezoelectric stack; 41-a wedge-shaped column; 42-wedge-shaped blocks;
5-a slide block; 51-U-shaped block; 52-a cover plate; 6-ceramic plate.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
Like the little displacement motor of two piezoelectric ceramics inertia drive formulas shown in fig. 1, along the direction of drive of motor, wholly be front and back symmetrical structure, the utility model discloses a respectively set up a piezoelectricity at both ends around and pile up 4 to the drive slides around being located middle slider 5, and uses slider 5 as the output to external output linear motion, constitutes a linear electric motor from this.
As shown in fig. 2, the casing 1 of the motor is a square ring structure, which plays a role in supporting the whole motor; two amplifying mechanisms 2 are symmetrically connected at two ends of the inner ring surface of the annular shell 1, and a sliding rail 3 is connected between the two amplifying mechanisms 2.
As shown in fig. 4, each amplification mechanism 2 includes two support portions 21 and two strain portions 22, wherein the two support portions 21 are disposed opposite to each other, the two support portions 21 are connected by the two strain portions 22, and the two strain portions 22 are respectively located at two side edges of the support portion 21, so that a space for placing the piezoelectric stack 4 is formed between the two support portions 21 and the two strain portions 22; the working principle of the amplifying mechanism 2 is as follows: when the two support parts 21 are drawn together, the strain parts 22 on both sides are expanded and deformed outward. In the utility model, the strain part 22 at one side of the amplifying mechanism 2 is connected with the shell 1, and the strain part 22 at the other side is connected with the slide rail 3; so that when the two support portions 21 in the amplification mechanism 2 at one end of the housing 1 are inwardly closed and the two support portions 21 in the amplification mechanism 2 at the other end of the housing 1 are outwardly expanded, the slide rail 3, which is jointly drivingly connected between the two amplification mechanisms 2, is moved toward one end, i.e., in the direction F shown in fig. 4.
As shown in fig. 1 and 3, each amplification mechanism 2 is provided with one piezoelectric stack 4, specifically, each of the two support portions 21 of the amplification mechanism 2 is provided with a wedge-shaped column 41 and a wedge-shaped block 42, wherein a bottom surface of the wedge-shaped block 42 abuts against an inner end surface of the support portion 21, a bolt is connected between a side surface of the wedge-shaped block 42 and the support portion 21, and the wedge-shaped block 42 can transversely translate along fig. 3 under the screwing action of the bolt; the inclined surface of one end of the wedge-shaped column 41 is in sliding fit with the wedge 42, and the other end is connected to the end surface of the piezoelectric stack 4, so that the piezoelectric stack 4 is tightly connected to the two support portions 21 by screwing the bolt, and the piezoelectric stack 4 is deformed by the voltage, thereby driving the two support portions 21 to expand or close.
As shown in fig. 1, a slide block 5 is connected to the slide rail 3, wherein the slide block 5 is composed of two parts, namely a U-shaped block 51 and a cover plate 52, and a U-shaped groove of the U-shaped block 51 is matched with the slide rail 3, so that the U-shaped block 51 is clamped on the slide rail 3 and can slide along the slide rail 3; the cover plate 52 is connected to the notched side of the U-shaped block 51 by bolts, so that the slider 5 is firmly seated on the slide rail 3. Be connected for smooth between slider 5 and the 3 two materials of slide rail of pure, nevertheless because the utility model discloses in need have the frictional force of certain size between the two, consequently still be equipped with potsherd 6 between slide rail 3 and slider 5 and be used for strengthening frictional force, the aluminium oxide pottery can be chooseed for use to the concrete material of potsherd 6, slide rail 3 side surface is equipped with the recess, through the fixed potsherd 6 of this recess joint, potsherd 6's length equals slider 5 the stroke length that slides on slide rail 3, through revolving the bolt of twisting between apron 52 and the U-shaped piece 51, can adjust the packing force between slider 5 and the potsherd 6.
The utility model discloses two piezoceramics inertia drive formula micro displacement motors adopts piezoelectricity to pile up 4 as the power supply, piles up 4 alternating voltage signal that apply opposite direction through the piezoelectricity for the motor both ends for piezoelectricity at both ends piles up 4 and makes regularity and opposite direction's expansion contraction, and 3 regular ground along motor fore-and-aft direction round trip movement of slide rail through the 2 drive of mechanism of amplification at both ends is located from this, and then drives 5 single direction movements of slider through frictional force.
Fig. 5 shows the movement diagram of the one-way movement of the driving slider 5 of the present invention, wherein in the process from the state a to the state b, the supporting portion 21 of the left-end amplification mechanism 2 is closed at a slow speed, and the supporting portion 21 of the right-end amplification mechanism 2 is expanded at a slow speed, so that the two jointly push the sliding rail 3 at a slow speed to move from left to right, and at this time, the sliding block 5 and the ceramic plate 6 are still rubbed, and therefore the sliding block 5 moves to right under the action of the static friction force. In the process from the state b to the state c, the supporting portion 21 of the left-end amplification mechanism 2 is expanded at a relatively high speed, and the supporting portion 21 of the right-end amplification mechanism 2 is also closed at a relatively high speed, so that the two mechanisms push the slide rail 3 to move horizontally from right to left in a relatively high speed, and the slide block 5 and the ceramic plate 6 show dynamic friction due to the inertia effect of the slide block 5 caused by the mass of the slide block 5, so that the slide block 5 is kept still. Through the reciprocating motion of the slide rail 3 of 'slow forward and fast backward', the slide block 5 can move towards one end of the motor 1 in a single direction, wherein the specific speed of the slow forward and fast backward needs to be matched with the maximum static friction force between the slide block 5 and the ceramic plate 6.
In fig. 4 and 5, the deformation of the amplifying mechanism 2 and the translation amplitude of the slide rail 3 are only illustrated in an exaggerated manner, and in actual operation, the piezoelectric stack 4, the amplifying mechanism 2 and the slide rail 3 all change in a small amplitude; therefore, by inputting a high-frequency alternating voltage to the piezoelectric stack 4, the slide rail 3 is caused to perform reciprocating vibration with a high frequency and a small amplitude, so that the slider 5 is continuously moved forward or backward in one direction, thereby constituting a linear motor.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. The present invention is not limited to the above embodiments, and any obvious improvements, replacements or modifications that can be made by those skilled in the art without departing from the essence of the present invention belong to the protection scope of the present invention.
Claims (7)
1. The utility model provides a little displacement motor of two piezoceramics inertia drive formula which characterized in that: the two ends in the shell (1) are respectively provided with an amplifying mechanism (2), a piezoelectric stack (4) is arranged in the amplifying mechanism (2), the input voltage of the two piezoelectric stacks (4) is alternating voltage, and the directions of the two input voltages are opposite at the same time; a sliding rail (3) is connected between the two amplifying mechanisms (2), the sliding rail (3) can be driven by the amplifying mechanisms (2) to reciprocate between the two amplifying mechanisms (2), and a sliding block (5) is movably connected to the sliding rail (3).
2. The bimorph piezoelectric ceramic inertia-driven micro-displacement motor according to claim 1, characterized in that: the amplification mechanism (2) comprises two supporting parts (21), two strain parts (22) are connected between the two supporting parts (21), the two strain parts (22) are respectively located on two sides of the supporting parts (21), one strain part (22) is connected with the shell (1), and the other strain part (22) is connected with the sliding rail (3).
3. The bimorph piezoelectric ceramic inertia-driven micro-displacement motor according to claim 2, characterized in that: piezoelectric stack (4) both ends are connected with two supporting part (21) through wedge post (41) and wedge (42) respectively, and wherein wedge post (41) one end links to each other with the terminal surface that piezoelectric stack (4), the inclined plane and the wedge (42) sliding fit of the other end, and wedge (42) bottom surface is supported and is leaned on supporting part (21) terminal surface to be connected with supporting part (21) through the bolt of side.
4. The bimorph piezoelectric ceramic inertia-driven micro-displacement motor according to claim 1, characterized in that: the slider (5) comprises U-shaped piece (51) and apron (52), and wherein U-shaped piece (51) joint is on slide rail (3), and apron (52) are connected through the breach one side of bolt with U-shaped piece (51).
5. The bimorph piezoelectric ceramic inertia-driven micro-displacement motor according to claim 4, wherein: and a ceramic plate (6) is also arranged between the sliding block (5) and the sliding rail (3), and the length of the ceramic plate (6) is equal to the stroke length of the sliding block (5).
6. The bimorph piezoelectric ceramic inertia-driven micro-displacement motor according to claim 5, wherein: a groove is formed in the surface of one side of the sliding rail (3), and the ceramic plate (6) is clamped through the groove.
7. The bimorph piezoelectric ceramic inertia-driven micro-displacement motor according to claim 1, characterized in that: the shell (1) is of a square annular structure, and the two amplification mechanisms (2) are respectively and symmetrically connected to two ends of the inner annular surface of the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121403911.0U CN215186503U (en) | 2021-06-23 | 2021-06-23 | Double piezoelectric ceramic inertia drive type micro-displacement motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121403911.0U CN215186503U (en) | 2021-06-23 | 2021-06-23 | Double piezoelectric ceramic inertia drive type micro-displacement motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215186503U true CN215186503U (en) | 2021-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121403911.0U Expired - Fee Related CN215186503U (en) | 2021-06-23 | 2021-06-23 | Double piezoelectric ceramic inertia drive type micro-displacement motor |
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| Country | Link |
|---|---|
| CN (1) | CN215186503U (en) |
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2021
- 2021-06-23 CN CN202121403911.0U patent/CN215186503U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211214 |