CN210201746U - Piezoelectric displacement amplifying mechanism - Google Patents
Piezoelectric displacement amplifying mechanism Download PDFInfo
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- CN210201746U CN210201746U CN201921302153.6U CN201921302153U CN210201746U CN 210201746 U CN210201746 U CN 210201746U CN 201921302153 U CN201921302153 U CN 201921302153U CN 210201746 U CN210201746 U CN 210201746U
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- flexible hinge
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- hinge
- support plate
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Abstract
The utility model discloses a piezoelectricity displacement mechanism of amplification, including the bed frame, be provided with on the bed frame: a transmission mechanism; the piezoelectric block is movably arranged on the transmission mechanism and moves along the transmission mechanism; the displacement amplification mechanism comprises at least one flexible hinge single body, the hinge end part of the flexible hinge single body is arranged on the base frame, and one end opposite to the hinge end part is separated from the base frame; the end face of one side of the flexible hinge monomer closest to the piezoelectric block is in contact with the piezoelectric block, and the problem that the amplification factor of displacement cannot be adjusted as required in the prior art is solved through the structure.
Description
Technical Field
The utility model belongs to the technical field of the displacement mechanism of amplifying, concretely relates to piezoelectricity displacement mechanism of amplifying.
Background
The piezoelectric property of a piezoelectric material can be expressed as displacement of the piezoelectric material when a voltage is applied across the piezoelectric material, but the displacement in each direction is small. With the development of microelectronic technology, the micron-sized displacement output of the piezoelectric material at the present stage cannot meet the actual application requirements, and the displacement of the piezoelectric material needs to be amplified. The flexible hinge is a hinge structure which is small in size, free of mechanical friction and free of gaps, and has the advantages of being capable of rebounding and high in precision. New structures, which are made of piezoelectric materials combined with flexible hinges, have been increasingly used.
The prior art discloses a full-flexible micro-displacement amplifying mechanism, which comprises a frame platform, a displacement amplifying mechanism, an output end and a piezoelectric material; the displacement amplification mechanism is arranged on the frame platform, the output end of the displacement amplification mechanism is arranged at the output part of the displacement amplification mechanism, the piezoelectric material is arranged on the frame platform, and the driving end of the piezoelectric material is aligned to the input end of the displacement amplification mechanism; the stand platform comprises a bottom plate, a left upright post and a right upright post; the displacement amplification mechanism comprises a primary displacement amplification mechanism and a secondary displacement amplification mechanism, and the displacement amplification mechanisms are symmetrical displacement amplification mechanisms;
the bottom plate is provided with the piezoelectric material, and the end part of the piezoelectric material is tightly propped against the lower surface of the input platform.
Although the above prior art combines a flexible mechanism with a piezoelectric material, the magnification of the displacement in the prior art cannot be adjusted as desired.
SUMMERY OF THE UTILITY MODEL
The utility model provides a piezoelectricity displacement mechanism of amplifying has solved the problem that the magnification of displacement can't be adjusted as required among the prior art.
In order to realize the purpose, the utility model adopts the following technical scheme:
the utility model provides a piezoelectric displacement mechanism of amplifying, includes the bed frame, is provided with on the bed frame:
a transmission mechanism;
the piezoelectric block is movably arranged on the transmission mechanism and moves along the transmission mechanism;
the displacement amplification mechanism comprises at least one flexible hinge single body, the hinge end part of the flexible hinge single body is arranged on the base frame, and one end opposite to the hinge end part is separated from the base frame; one side end face of the flexible hinge monomer closest to the piezoelectric block is in contact with the piezoelectric block.
Preferably, the base frame comprises a bottom plate, a first support plate and a second support plate are oppositely arranged on the bottom plate, and the flexible hinge monomer is installed between the first support plate and the second support plate.
Preferably, the hinge end of the flexible hinge unit is mounted to the first or second support plate.
Preferably, the number of the flexible hinge single bodies is at least two, and the hinge end parts of the adjacent flexible hinge single bodies are alternately arranged on the first support plate or the second support plate; the end opposite to the hinge end on the flexible hinge monomer is a supporting end, a boss is arranged on the upper end face of the supporting end, and the upper surface of the boss is in contact with the lower surface of the adjacent flexible hinge.
Preferably, the hinge end parts of adjacent flexible hinge single bodies are provided with mutually matched inserting structures, and the inserting parts of one flexible hinge single body can be inserted into the grooves of the adjacent flexible hinge single bodies for oppositely arranging the grooves and the inserting parts on the two end surfaces of the hinge end parts.
Preferably, the transmission mechanism comprises a lead screw and a lead screw sliding block, and the lead screw penetrates through the first support plate or the second support plate of the base frame; one end face of the lead screw sliding block is fixedly connected with the piezoelectric block, and the piezoelectric block is driven to move along the transmission direction of the lead screw.
Preferably, a handle is installed at one end of the screw rod, which is positioned at the outer side of the base frame.
Preferably, a sliding groove is formed in a bottom plate of the base frame, an inserting portion is arranged at the bottom end of the piezoelectric block, and the structure of the inserting portion is matched with the structure of the sliding groove and inserted into the sliding groove, so that the piezoelectric block can move on the base frame along the transmission direction of the lead screw.
Preferably, a dial gauge is arranged on one side surface of the bottom plate of the base frame.
Compared with the prior art, the invention has the advantages and positive effects that:
1. the application designs a piezoelectric displacement mechanism of amplifying, piezoelectric displacement mechanism of amplifying includes drive mechanism, piezoelectric block and displacement mechanism of amplifying, and the terminal surface of piezoelectric block meets the department with the free terminal surface of flexible hinge. When voltage is applied to two end faces of the piezoelectric block, the piezoelectric block deforms, so that the flexible hinge monomer is pushed to move upwards, due to the lever principle, the support end part at the other end of the flexible hinge monomer moves upwards, the movement amplitude is larger than the displacement of the deformation of the piezoelectric material, and the amplification of the displacement is realized. Meanwhile, the piezoelectric block is fixed on the transmission mechanism and can move along the transmission direction of the transmission mechanism, so that the relative position of the piezoelectric block and the flexible hinge monomer can be changed through the rotation of the transmission mechanism, and the amplification factor of displacement is changed along with the change of the piezoelectric block due to the lever principle. Therefore, the relative position of the piezoelectric material and the flexible hinge monomer can be adjusted through the transmission mechanism according to actual needs, and then the amplification factor of displacement is freely adjusted, so that the problem that the amplification factor of displacement in the prior art cannot be adjusted as required is solved.
2. The number of the flexible hinge single bodies is at least two, so that the displacement amplification effect is further increased; and the hinge end parts of the adjacent flexible hinge monomers are provided with mutually matched plug-in mounting structures, and the number of the flexible hinge monomers can be disassembled or increased according to actual needs by adopting the structure, so that the problem that the displacement amplification factor is adjusted according to needs is further solved.
3. The transmission mechanism in the application adopts a lead screw transmission device, and is provided with a rotary lead screw capable of adjusting the amplification factor, so that the required amplification factor can be easily adjusted; and the handle is installed to the one end of lead screw, can adjust piezoelectric material and the free relative position of flexible hinge through rotatory handle to this magnification of control displacement has made things convenient for the displacement magnification to adjust as required, has also improved the efficiency of adjustment multiple simultaneously.
4. Still be equipped with the graduation apparatus on the terminal surface of bed frame in this application for more convenience when adjusting displacement magnification.
5. Be equipped with the spout on the bottom plate in this application, the bottom of piezoelectric block is equipped with grafting portion, but the cartridge dress makes the piezoelectric block can follow screw drive direction motion on the bed frame in the spout, ensures that piezoelectric material slides the in-process and does not squint.
Drawings
Fig. 1 is a schematic view of the overall mechanism of the present invention;
fig. 2 is a schematic perspective view of the present invention;
in the above figures: the flexible hinge comprises a base frame 1, a first support plate 101, a second support plate 102, a bottom plate 103, a sliding groove 104, a dial gauge 105, a piezoelectric block 2, a transmission mechanism 3, a lead screw 31, a sliding block 32, a displacement amplification mechanism 4, a flexible hinge single body 41, a hinge end portion 411, a supporting end portion 412, a groove 413, an inserting portion 414 and a handle 5.
Detailed Description
The technical scheme of this application embodiment for solving the problem that the magnification of having solved displacement among the prior art can't adjust as required among the above-mentioned prior art, the general thinking is as follows:
by providing a piezoelectric displacement amplifying mechanism, which includes a transmission mechanism 3; the piezoelectric block 2 is movably arranged on the transmission mechanism 3, so that the piezoelectric block 2 can move along the transmission mechanism 3; and the displacement amplification mechanism 4, wherein the displacement amplification mechanism 4 comprises at least one flexible hinge monomer 41, and one end surface of the flexible hinge monomer is in contact with the piezoelectric block 3. Through adopting above structure, solved the problem that the magnification of displacement can't be adjusted as required among the prior art.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
The utility model provides a piezoelectric displacement mechanism of amplifying, includes bed frame 1, is provided with on bed frame 1: the piezoelectric device comprises a transmission mechanism 3, a piezoelectric block 2 and a displacement amplification mechanism 4; the piezoelectric block 2 is movably arranged on the transmission mechanism, so that the piezoelectric block 2 can move along the transmission direction of the transmission mechanism 3; the displacement amplification mechanism 4 comprises at least one flexible hinge single body 41, a hinge end part 411 of the flexible hinge single body 41 is arranged on the base frame 1, and one end opposite to the hinge end part 411 is separated from the base frame 1; one side end face of the flexible hinge unit 41 closest to the piezoelectric block 2 is in contact with the piezoelectric block 2.
As shown in fig. 1-2, the base frame 1 of the piezoelectric displacement amplifying mechanism in this embodiment includes a bottom plate 103, and a first support plate 101 and a second support plate 102 are disposed on the bottom plate 103, and in this embodiment, the two support plates are disposed in parallel relatively. A flexible hinge unit 41 is mounted between the first plate 101 and the second plate 102.
In this embodiment, there are at least two flexible hinge units 41, the flexible hinge unit 41 includes a hinge end 411 and a support end 412, where the hinge end 411 is a flexible end of the flexible hinge unit 41, the hinge end 411 is processed into a structure with weaker strength, and the opposite support end 412 has better flexibility, and referring to fig. 1, in this embodiment, the hinge end 411 is thinner than the whole flexible hinge unit 41, and is more prone to elastic vibration. The hinge end 411 is a fixed end, which is fixed to the first plate 101 or the second plate 102.
In order to further solve the problem of installation among the plurality of flexible hinge single bodies 41, in the embodiment, the hinge ends 411 of the adjacent flexible hinge single bodies 41 are provided with mutually matched insertion structures. The inserting structure is a groove 413 and an inserting part 414 which are oppositely arranged on two side surfaces of the hinge end 411, the inserting part of one flexible hinge single body 41 can be inserted into the groove 413 of the adjacent flexible hinge single body 41, and by adopting the structure, the number of the flexible hinge single bodies 41 can be disassembled or increased according to actual needs, namely, the displacement magnification can be adjusted according to needs.
The flexible hinge unit 41 closest to the piezoelectric block may be directly fixed to the base frame 1 to form an integral structure, or may be provided with the insertion structure at a corresponding mounting position on the base frame 1 for insertion mounting.
The end of the flexible hinge single body 41 opposite to the hinge end 411 is a supporting end 412, the supporting end 412 is a movable end, and is separated from the base frame 1, in this embodiment, a boss is arranged on the upper surface of the supporting end 412, the upper surface of the boss tightly abuts against the lower surface of the adjacent flexible hinge 41, and the boss has a main function that when the flexible hinge single body 41 is acted by an upward acting force, due to a lever principle, the supporting end of the flexible hinge single body 41 moves upward, and then the next flexible hinge single body 41 is jacked up again under the action of the boss, so that the supporting end is transferred to the last flexible hinge single body 41, and amplification of displacement is realized.
The transmission mechanism 3 is a screw transmission device and comprises a screw 31 and a slider 32, the screw 31 passes through the first support plate 101 or the second support plate 102 of the base frame 1, the slider 32 is sleeved on the screw 31, and the rotary motion of the screw 31 can be converted into the linear motion of the slider. When one end of the screw 31 passes through the first support plate 101, the end is provided with the handle 5, and the other end is close to the inner side of the second support plate 102, so that the other end can not contact with the second support plate 102, and can also be movably arranged on the second support plate 102 on the basis of ensuring that the screw 31 can freely rotate; when one end of the screw 31 passes through the second support plate 102, the handle 5 is mounted on the end, and the other end is close to the inner side of the first support plate 101, so that the other end does not contact with the first support plate 101, and the screw 31 can be movably mounted on the first support plate 101 on the basis of ensuring the free rotation. In this embodiment, one end of the lead screw 31 passes through the first support plate 102 and is mounted with the handle 5, and the other end is movably mounted on the second support plate 102, the lead screw 31 can rotate by rotating the handle 5, and when the lead screw 31 rotates, the slider 32 can do linear motion along the axial direction of the lead screw 31.
In this embodiment, the piezoelectric block 2 is fixedly mounted on the slider 32, so that when the screw rod rotates, the piezoelectric block 2 can move linearly along the axial direction of the screw rod 31 along with the slider 32. And piezoelectric block 2 is located the bottom plate 103 of bed frame 1, is equipped with spout 104 on the bottom plate 103, and the bottom of piezoelectric block 2 is equipped with grafting portion, the structure of grafting portion and spout 104 structure cooperate, and the cartridge is in spout 104, through adopting this structure, makes piezoelectric block 2 can not take place the skew along the in-process of lead screw 31 transmission direction motion on the bed frame.
For a clearer explanation of the present application, the working principle of the present invention is further explained below by taking the embodiments shown in fig. 1 to 2 as examples:
when a voltage is applied across the piezoelectric block 2, deformation occurs under the action of an electric field due to the characteristics of the piezoelectric block 2. The piezoelectric block 2 is in contact with the end face of the flexible hinge single body 41, so when the piezoelectric block 2 deforms, the flexible hinge single body 41 is pushed to move upwards, and due to the lever principle, the supporting end part 412 of the flexible hinge single body 41 moves upwards, and the movement amplitude is larger than the displacement of the piezoelectric block deformation, so that the displacement amplification is realized.
Meanwhile, a protrusion is arranged on the upper end face of the supporting end part 412 and is in contact with the adjacent flexible hinge single body 41, and in the process that the supporting end part 412 moves upwards, the protrusion can jack up the adjacent flexible hinge single body 41 to transmit the flexible hinge single body 41 to the last flexible hinge single body 41, so that displacement amplification is further achieved.
Since the piezoelectric block 2 can follow the linear motion of the slider 32 along the axial direction of the screw rod 31, that is, when the piezoelectric block 2 moves along the axial direction of the screw rod 31, the relative position between the piezoelectric block 2 and the hinge end of the flexible hinge unit 41 changes, and the amplification factor of the displacement amplification mechanism 4 changes according to the lever principle, as shown in fig. 2, when the piezoelectric block 2 is far away from the hinge end 411, the amplification factor of the displacement amplification mechanism 4 decreases, and thus according to this principle, the amplification factor of the displacement can be adjusted as required by rotating the handle 5.
Meanwhile, the two ends of the flexible hinge single body 41 are provided with the grooves 413 and the inserting parts 414, so that the number of the flexible hinge single bodies 41 can be increased or reduced according to actual needs, and the problem that the displacement amplification factor cannot be adjusted according to needs in the prior art is further solved. And the end face of the base frame 1 is provided with a scale 105 of magnification, according to which the magnification of displacement can be adjusted more conveniently.
The present invention has been described in detail above with reference to exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present application, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; either directly or through an intermediary profile. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Claims (9)
1. The utility model provides a piezoelectric displacement mechanism of amplifying, includes the bed frame, its characterized in that is provided with on the bed frame:
a transmission mechanism;
the piezoelectric block is movably arranged on the transmission mechanism and moves along the transmission mechanism;
the displacement amplification mechanism comprises at least one flexible hinge single body, the hinge end part of the flexible hinge single body is arranged on the base frame, and one end opposite to the hinge end part is separated from the base frame; one side end face of the flexible hinge monomer closest to the piezoelectric block is in contact with the piezoelectric block.
2. A piezoelectric displacement amplification mechanism as claimed in claim 1, wherein the base frame comprises a base plate, the base plate having a first support plate and a second support plate disposed opposite to each other, the flexible hinge unit being mounted between the first support plate and the second support plate.
3. A piezoelectric displacement amplification mechanism as claimed in claim 2, wherein the hinge end of the flexible hinge element is mounted on the first or second support member.
4. A piezoelectric displacement amplifying mechanism according to claim 3, wherein the number of the flexible hinge units is at least two, and the hinge ends of adjacent flexible hinge units are alternately mounted on the first support plate or the second support plate; the end, opposite to the hinge end, of the flexible hinge monomer is a supporting end, a boss is arranged on the upper surface of the supporting end, and the upper surface of the boss tightly abuts against the lower surface of the adjacent flexible hinge.
5. A piezoelectric displacement amplifying mechanism as claimed in claim 4, wherein the hinge ends of adjacent flexible hinge units are provided with mating insertion structures, the insertion structures being recesses and insertion portions provided at opposite ends of the hinge ends, the insertion portion of one flexible hinge unit being insertable into the recess of an adjacent flexible hinge unit.
6. The piezoelectric displacement amplification mechanism of claim 2, wherein the transmission mechanism comprises a lead screw and a lead screw slider, and the lead screw passes through the first support plate or the second support plate of the base frame; one end face of the lead screw sliding block is fixedly connected with the piezoelectric block, and the piezoelectric block is driven to move along the transmission direction of the lead screw.
7. A piezoelectric displacement amplification mechanism as claimed in claim 2, wherein the end of the lead screw outside the base frame is provided with a handle.
8. The piezoelectric displacement amplifying mechanism according to claim 2, wherein a sliding groove is formed on the bottom plate of the base frame, and an insertion portion is formed at the bottom end of the piezoelectric block, and the insertion portion is structurally matched with the sliding groove and inserted into the sliding groove, so that the piezoelectric block can move on the base frame along the transmission direction of the lead screw.
9. A piezoelectric displacement amplification mechanism as claimed in claim 2 or claim 8, wherein the base plate is provided with a scale on one side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921302153.6U CN210201746U (en) | 2019-08-12 | 2019-08-12 | Piezoelectric displacement amplifying mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921302153.6U CN210201746U (en) | 2019-08-12 | 2019-08-12 | Piezoelectric displacement amplifying mechanism |
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| CN210201746U true CN210201746U (en) | 2020-03-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323966A (en) * | 2019-08-12 | 2019-10-11 | 潍坊聚德电子有限公司 | A kind of displacement bimorph enlarger |
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- 2019-08-12 CN CN201921302153.6U patent/CN210201746U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323966A (en) * | 2019-08-12 | 2019-10-11 | 潍坊聚德电子有限公司 | A kind of displacement bimorph enlarger |
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