CN208939845U - A kind of linear ultrasonic motor based on multistage vibration synthesis - Google Patents
A kind of linear ultrasonic motor based on multistage vibration synthesis Download PDFInfo
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- CN208939845U CN208939845U CN201821674120.XU CN201821674120U CN208939845U CN 208939845 U CN208939845 U CN 208939845U CN 201821674120 U CN201821674120 U CN 201821674120U CN 208939845 U CN208939845 U CN 208939845U
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Abstract
The utility model provides a kind of linear ultrasonic motor based on multistage vibration synthesis, stacks including stator, mover and by multi-disc piezoelectric ceramics the first piezoelectric ceramics lamination formed, the second piezoelectric ceramics lamination, third piezoelectric ceramics lamination；Third piezoelectric ceramics lamination；The stator includes mobile jib, the first secondary bar, the second secondary bar；First secondary bar and the second secondary bar are parallel to each other and vertical with the mobile jib and be connected on the mobile jib；Between first secondary bar and the second secondary bar, the first piezoelectric ceramics lamination is set to the middle part of the mobile jib at the middle part of the mobile jib；The second piezoelectric ceramics lamination is set to the part that first secondary bar is located at the side of the mobile jib；The third piezoelectric ceramics lamination is set to the part that second secondary bar is located at the other side of the mobile jib；The volume of motor is greatly reduced using the technical program, realizes that motor is quickly responded and more steadily exported.
Description
Technical field
The utility model relates to motor driven field, in particular to a kind of line ultrasonic electricity based on multistage vibration synthesis
Machine.
Background technique
Ultrasound electric machine is the novel driving device developed in recent decades, relies primarily on the inverse piezoelectricity effect of piezoelectric ceramics
It should realize conversion of the electric energy to mechanical energy, and the friction between driving foot and the rotor for passing through motor stator carries out power
Output.Ultrasound electric machine has the advantages that response is fast, and low-speed big cuts off self-lock, and position resolution is high, and is able to satisfy low
Noise, small in size, the conditions such as no electromagnetic interference, now in aerospace, medical treatment, robot, precision instrument, Precision Machining
Equal fields receive extensive use.But ultrasound electric machine in the prior art still has that structure is complicated, and piezoelectric ceramics is using pasting
Mode be pasted on body structure surface, this, which results in motor volume, to reduce, the unstable problem of motor application.In addition, also right
The width of mover excessively limits, and needs to design the model of motor repeatedly according to the size of mover, this is answered to the reality of ultrasound electric machine
With bringing very big puzzlement.
Utility model content
The purpose of the utility model is to overcome above-mentioned deficiencies in the prior art, provide a kind of based on multistage vibration synthesis
Linear ultrasonic motor, greatly reduce the volume of motor, realize that motor is quickly responded and more steadily exported.
In order to solve the above-mentioned technical problem, the utility model provides a kind of line ultrasonic electricity based on multistage vibration synthesis
Machine, including stator, mover and stacked by multi-disc piezoelectric ceramics the first piezoelectric ceramics lamination formed, the second piezoelectric ceramics lamination,
Third piezoelectric ceramics lamination；
The stator includes mobile jib, the first secondary bar, the second secondary bar；First secondary bar and the second secondary bar be parallel to each other and with
The mobile jib is vertical and is connected on the mobile jib；The middle part of the mobile jib between first secondary bar and the second secondary bar,
The first piezoelectric ceramics lamination is set to the crest location of the single order mode of oscillation of the i.e. described mobile jib in middle part of the mobile jib；Institute
State part i.e. described first secondary bar that the second piezoelectric ceramics lamination is set to the side that first secondary bar is located at the mobile jib
The crest location of second order vibration mode, to excite the stator in the first-order bending vibration of transverse plane；The third piezoelectricity
The second order vibration of ceramic laminated i.e. described second secondary bar in part for being set to the other side that second secondary bar is located at the mobile jib
The crest location of mode, to excite the stator in the second order bending vibration of perpendicular；
Form the piezoelectric ceramics of the first piezoelectric ceramics lamination, the second piezoelectric ceramics lamination, third piezoelectric ceramics lamination
Between by copper electrode connect, the piezoelectric ceramics along median plane divide；
One side surface of the mobile jib is provided with driving foot, and the mover is pressed on the driving foot.
In a preferred embodiment, the connection intersection point of the mobile jib and the first secondary bar and the second secondary bar is located at the transverse direction
The trough intersection of the second order bending vibration of the trough and perpendicular of the first-order bending vibration of plane.
In a preferred embodiment, the first piezoelectric ceramics lamination, the second piezoelectric ceramics lamination, third piezoelectric ceramics
Lamination is respectively arranged in the mobile jib, the first secondary bar by the interference fit of screw-nut, in the second secondary bar.
In a preferred embodiment, the driving foot is specially the cross of triangle perpendicular to the screenshot of its length direction
Beam.
In a preferred embodiment, the first piezoelectric ceramics lamination, the second piezoelectric ceramics lamination, third piezoelectric ceramics
Lamination specifically is stacked to be formed by four tabletting ceramics, is formed with the subregion under excitation in the same time with opposite inverse piezoelectric effect.
Compared to the prior art, the technical solution of the utility model have it is following the utility model has the advantages that
1. the utility model provides a kind of linear ultrasonic motor based on multistage vibration synthesis, structure is simple, using pressure
Electroceramics lamination is assemblied in the gap of mobile jib and the first secondary bar, the second secondary bar, instead of conventional piezoelectric stick ceramic in structure table
The mode in face, therefore can greatly reduce the volume of motor；Additionally due to piezoelectric ceramics is to stack to place, it can multi-disc piezoelectric ceramics
It drives simultaneously, therefore can realize bigger thrust, faster response and more stable output.Have simultaneously cut off self-lock etc. it is excellent
Point.
2. the utility model provides a kind of linear ultrasonic motor based on multistage vibration synthesis, do not have for mover width
Excessive limitation, avoids the need for the inconvenience for designing motor model repeatedly according to the size of mover.
3. the utility model provides a kind of linear ultrasonic motor based on multistage vibration synthesis, it is former that vibration superposition is utilized
Reason can change motor driven direction by changing the phase difference of pumping signal.
Detailed description of the invention
Fig. 1 is the structural representation of the linear ultrasonic motor based on multistage vibration synthesis in the preferred embodiment in the utility model
Figure；
Fig. 2 is the first piezoelectricity pottery of the linear ultrasonic motor based on multistage vibration synthesis in the preferred embodiment in the utility model
The concrete structure schematic diagram of porcelain lamination；
Fig. 3 is the input stimulus of the linear ultrasonic motor based on multistage vibration synthesis in the preferred embodiment in the utility model
When, the first piezoelectric ceramics lamination and mobile jib deformation schematic diagram；
Fig. 4 is under the dynamic excitation of the linear ultrasonic motor based on multistage vibration synthesis in the preferred embodiment in the utility model
Second order bending vibration schematic diagram；
Fig. 5 is under the dynamic excitation of the linear ultrasonic motor based on multistage vibration synthesis in the preferred embodiment in the utility model
First-order bending vibration schematic diagram.
Specific embodiment
The utility model is described further below in conjunction with the drawings and specific embodiments.
A kind of linear ultrasonic motor based on multistage vibration synthesis, referring to figs. 1 to 2, including stator, mover and by multi-disc pressure
Electroceramics 111 stacks the first piezoelectric ceramics lamination 11, the second piezoelectric ceramics lamination 21, third piezoelectric ceramics lamination 31 to be formed；
Vibration principle of stacking is utilized, motor driven direction can be changed by changing the phase difference of pumping signal.
The stator includes mobile jib 1, the first secondary bar 2, the second secondary bar 3；First secondary bar 2 and the second secondary bar 3 are mutually flat
It is capable and vertical with the mobile jib 1 and be connected on the mobile jib 1；The middle part of the mobile jib 1 is located at first secondary bar 2 and second
Between secondary bar 3, the first piezoelectric ceramics lamination 11 is set to the single order vibration mould of the i.e. described mobile jib 1 in middle part of the mobile jib 1
The crest location of state；The second piezoelectric ceramics lamination 21 is set to the portion that first secondary bar 2 is located at the side of the mobile jib 1
The crest location for dividing the i.e. second order vibration mode of first secondary bar 2, to excite the stator curved in the single order of transverse plane
Qu Zhendong；The third piezoelectric ceramics lamination 31 be set to second secondary bar 3 be located at the mobile jib 1 the other side part i.e.
The crest location of the second order vibration mode of second secondary bar 3, to excite the stator in the second order bending vibration of perpendicular
It is dynamic.The mobile jib 1 and the connection intersection point of the first secondary bar 2 and the second secondary bar 3 are located at the first-order bending vibration of the transverse plane
The trough intersection of the second order bending vibration of trough and perpendicular.
Specifically, it is folded that the first piezoelectric ceramics lamination 11, the second piezoelectric ceramics lamination 21, third piezoelectric ceramics are formed
It is connected by copper electrode between the piezoelectric ceramics 111 of layer 31, the piezoelectric ceramics 111 is divided along median plane；In the present embodiment
In, the first piezoelectric ceramics lamination 11, the second piezoelectric ceramics lamination 21, third piezoelectric ceramics lamination 31 are specifically pressed by four
Piece ceramics stack to be formed, and are formed with the subregion under excitation in the same time with opposite inverse piezoelectric effect.One side surface of the mobile jib 1
It is provided with driving foot, the mover is pressed on the driving foot, and specifically, the driving is specially perpendicular to its length enough
The screenshot in direction is the crossbeam of triangle.
Specifically, the first piezoelectric ceramics lamination 11, the second piezoelectric ceramics lamination 21, third piezoelectric ceramics lamination 31
The mobile jib 1, the first secondary bar 2 are respectively arranged in, in the second secondary bar 3 by the interference fit of screw-nut.
The motivational techniques of the above-mentioned linear ultrasonic motor based on multistage vibration synthesis introduced below,
Input sinusoidal pattern excitation；When apply dynamic excitation E1=sin (π t) a certain moment, each piezoelectric ceramics 111
Upper half subregion axially contracts, and the lower half subregion of each piezoelectric ceramics 111 is upheld along axial, due to 111 lamination of piezoelectric ceramics with
Mobile jib 1 and the first secondary bar 2, the second secondary bar 3 interference fit, the mobile jib 1, the first width bar, the second secondary bar 3 generate bending；Make
The mobile jib 1 is done along axial sinusoidal pattern vibration as shown in figure 3, bending and the master of first secondary bar 2 and the second secondary bar 3
Bar 1 is identical；First-order bending vibration occurs with the first secondary bar 2 respectively for mobile jib 1 and second order bending vibration occurs for the second secondary bar 3, specifically
As shown in Figure 3.
When a certain moment of external dynamic excitation E2=sin (- π t), contrary to the above, the upper half of each piezoelectric ceramics 111
Subregion is upheld along axial, and the lower half subregion of each piezoelectric ceramics 111 axially contracts, due to 111 lamination of piezoelectric ceramics and mobile jib 1
And first secondary bar 2, the second secondary bar 3 interference fit, the mobile jib 1, the first secondary bar 2, the second secondary bar 3 generate bending；To drive
Mobile jib 1 does phase difference and is the reversed elliptic motion of pi/2, so that mover be pushed to do the movement of opposite direction；The stator and mover
It squeezes and generates friction, push mover movement.
It since the first piezoelectric ceramics lamination 11 is located at the midpoint of the bar, while being also single order vibration for mobile jib 1
At wave crest.As external E1=sin (π t), the first piezoelectric ceramics lamination 11 will drive mobile jib 1 to do the vibration of the first-order flexure in space
It is dynamic, vibration shape signal such as Fig. 4.
For the first width bar and the second secondary bar 3, the second piezoelectric ceramics lamination 21 and third piezoelectric ceramics lamination 31 distinguish position
In the first width bar and a quarter position away from one end endpoint of the second secondary bar 3, at the same be also second order vibration wave crest at.When outer
When meeting E1=sin (π t), the first piezoelectric ceramics lamination 11 will drive mobile jib 1 to do the second order bending vibration in space, vibration shape
Signal such as Fig. 5.
Since mobile jib 1 and the first secondary bar 2,3 point of intersection of the second secondary bar are that single order vibrates at trough and second order vibration trough, because
, when each rod piece vibrates, the phase difference of orthogonal synthesis of the mobile jib 1 by generation spatially is that the conjunction of pi/2 is vibrated, motion profile for this
For elliptic motion.And then stator, mover squeeze and generate friction, push mover movement.
The utility model provides a kind of linear ultrasonic motor based on multistage vibration synthesis, and structure is simple, using piezoelectricity
Ceramic 111 laminations are assemblied in the gap of mobile jib 1 and the first secondary bar 2, the second secondary bar 3, are pasted on instead of conventional piezoelectric ceramics 111
The mode of body structure surface, therefore can greatly reduce the volume of motor；Additionally due to piezoelectric ceramics 111 is to stack to place, it can be more
Piece piezoelectric ceramics 111 drives simultaneously, therefore can realize bigger thrust, faster response and more stable output.Have simultaneously
The advantages that cutting off self-lock.Mover width is not limited excessively, avoids the need for designing motor repeatedly according to the size of mover
The inconvenience of model.
The preferable specific embodiment of the above, only the utility model, but the design concept of the utility model is not
It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, utilizes this design
The change that unsubstantiality is carried out to the utility model belongs to the behavior for invading scope of protection of the utility model.
Claims (5)
1. a kind of linear ultrasonic motor based on multistage vibration synthesis, it is characterised in that including stator, mover and by multi-disc piezoelectricity
Ceramics stack the first piezoelectric ceramics lamination, the second piezoelectric ceramics lamination, third piezoelectric ceramics lamination to be formed；
The stator includes mobile jib, the first secondary bar, the second secondary bar；First secondary bar and the second secondary bar be parallel to each other and with it is described
Mobile jib is vertical and is connected on the mobile jib；The middle part of the mobile jib is described between first secondary bar and the second secondary bar
First piezoelectric ceramics lamination is set to the crest location of the single order mode of oscillation of the i.e. described mobile jib in middle part of the mobile jib；Described
Two piezoelectric ceramics laminations are set to the second order of i.e. described first secondary bar in part for the side that first secondary bar is located at the mobile jib
The crest location of mode of oscillation, to excite the stator in the first-order bending vibration of transverse plane；The third piezoelectric ceramics
Lamination is set to the second order vibration mode of i.e. described second secondary bar in part for the other side that second secondary bar is located at the mobile jib
Crest location, to excite the stator in the second order bending vibration of perpendicular；
Between the piezoelectric ceramics for forming the first piezoelectric ceramics lamination, the second piezoelectric ceramics lamination, third piezoelectric ceramics lamination
It is connected by copper electrode, the piezoelectric ceramics is divided along median plane；
One side surface of the mobile jib is provided with driving foot, and the mover is pressed on the driving foot.
2. it is according to claim 1 based on it is multistage vibration synthesis linear ultrasonic motor, which is characterized in that the mobile jib with
The connection intersection point of first secondary bar and the second secondary bar is located at the trough and perpendicular of the first-order bending vibration of the transverse plane
The trough intersection of second order bending vibration.
3. the linear ultrasonic motor according to claim 1 based on multistage vibration synthesis, which is characterized in that first pressure
Electroceramics lamination, the second piezoelectric ceramics lamination, third piezoelectric ceramics lamination are respectively arranged in by the interference fit of screw-nut
The mobile jib, the first secondary bar, in the second secondary bar.
4. the linear ultrasonic motor according to claim 1 based on multistage vibration synthesis, which is characterized in that the driving foot
It is specially the crossbeam of triangle perpendicular to the screenshot of its length direction.
5. the linear ultrasonic motor according to claim 1 based on multistage vibration synthesis, which is characterized in that first pressure
Electroceramics lamination, the second piezoelectric ceramics lamination, third piezoelectric ceramics lamination specifically are stacked to be formed by four tabletting ceramics, are formed
With the subregion with opposite inverse piezoelectric effect under excitation in the same time.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194189A (en) * | 2018-10-16 | 2019-01-11 | 华侨大学 | A kind of linear ultrasonic motor and its electric excitation method thereof based on multistage vibration synthesis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194189A (en) * | 2018-10-16 | 2019-01-11 | 华侨大学 | A kind of linear ultrasonic motor and its electric excitation method thereof based on multistage vibration synthesis |
| CN109194189B (en) * | 2018-10-16 | 2023-08-29 | 华侨大学 | Linear ultrasonic motor based on multi-order vibration synthesis and electric excitation method thereof |
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