CN213352193U - Large-displacement precision positioning table - Google Patents
Large-displacement precision positioning table Download PDFInfo
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- CN213352193U CN213352193U CN202022088392.5U CN202022088392U CN213352193U CN 213352193 U CN213352193 U CN 213352193U CN 202022088392 U CN202022088392 U CN 202022088392U CN 213352193 U CN213352193 U CN 213352193U
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Abstract
The utility model provides a large-displacement precision positioning table, which comprises a main table body, a hinge mechanism and piezoelectric ceramics, wherein the main table body comprises a main table body upper end plate, a main table body lower end plate and four main table body stand columns, the main table body upper end plate is arranged right above the main table body lower end plate, the main table body upper end plate is fixedly connected with the upper ends of the four main table body stand columns through connecting arms, the four main table body stand columns are uniformly and fixedly arranged around the main table body lower end plate, the hinge mechanism is arranged between the main table body upper end plate and the main table body lower end plate, the upper ends of the hinge mechanism are fixedly connected with the main table body upper end plate, and the lower ends of the hinge mechanism are fixedly connected with the main table body lower end plate; the piezoelectric ceramics are arranged in the hinge mechanism and serve as driving elements, when voltage is applied to the piezoelectric ceramics, the displacement output by the piezoelectric ceramics is transmitted to the upper end face of the main stage body through the hinge mechanism, and the upper end face of the main stage body is driven to vertically move. The utility model discloses the resolution ratio is high in the motion, response frequency is fast, the displacement obtains amplifying, avoids the pottery to receive external pulling force, torsion and shearing force.
Description
Technical Field
The utility model belongs to the technical field of positioner, especially, relate to a big displacement precision positioning platform.
Background
The traditional positioning device is driven by a motor, has the problems of low resolution, slow response frequency, large volume, large friction and the like, and is difficult to meet the precision motion requirement in the micro-nano field. At present, more and more attention is paid to piezoelectric ceramics in the precision motion of the micro-nano field. Piezoelectric ceramics are a class of electronic ceramic materials having piezoelectric properties. The piezoelectric ceramic can convert mechanical energy and electric energy mutually, has sensitive characteristics, can convert extremely weak mechanical vibration into an electric signal, has good frequency stability and high precision, but has the problems that the piezoelectric ceramic can only generate thrust under given voltage when being applied to micro-nano precise motion, the internal structure of the piezoelectric ceramic is easy to damage when the piezoelectric ceramic is subjected to the external forces of pulling force, torsion force, shearing force and the like, and the output displacement of the piezoelectric ceramic is small as a driving source.
Disclosure of Invention
In view of this, the utility model aims at providing a big displacement precision positioning platform, the resolution ratio is high in the motion, response frequency is fast, the displacement obtains enlargeing to and this precision positioning platform can avoid pottery to receive external pulling force.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a large-displacement precision positioning table comprises a main table body, a hinge mechanism and piezoelectric ceramics, wherein the main table body comprises a main table body upper end plate, a main table body lower end plate, four main table body stand columns and four connecting arms, the main table body upper end plate is arranged right above the main table body lower end plate, the main table body upper end plate is fixedly connected with the upper ends of the four main table body stand columns through the four connecting arms respectively, the four main table body stand columns are uniformly and fixedly arranged on the periphery of the main table body lower end plate, the hinge mechanism is arranged between the main table body upper end plate and the main table body lower end plate, the upper end of the hinge mechanism is fixedly connected with the main table body upper end plate, and the lower end of the hinge mechanism is fixedly connected with the main table body lower end plate; the piezoelectric ceramic is arranged in the hinge mechanism;
the piezoelectric ceramics are used as driving elements, when voltage is applied to the piezoelectric ceramics, the displacement output by the piezoelectric ceramics is transmitted to the upper end plate of the main platform body through the hinge mechanism, and the upper end plate of the main platform body is driven to vertically move.
Further, the hinge mechanism comprises an upper boss, a lower boss, a first long arm, a second long arm, a third long arm, a fourth long arm, eight flexible hinges, a left upright post and a right upright post, wherein the upper boss is positioned above the lower boss, the two upright posts are arranged at the left side and the right side of the upper boss, the left end and the right end of the upper boss are respectively connected with one end of the first long arm and one end of the fourth long arm through the flexible hinges, the other end of the first long arm is connected with the upper part of the left upright post, the other end of the fourth long arm is connected with the upper part of the right upright post, the left end and the right end of the lower boss are respectively connected with one end of the second long arm and one end of the third long arm through the flexible hinges, the other end of the second long arm is connected with the lower part of the left upright post, the other end of the third long arm is connected with the lower part of the right upright post, and the upper boss, the lower boss, the four long arms and, the included angles between the four long arms and the horizontal plane are 5-18 degrees, the first long arm and the fourth long arm are symmetrically arranged about the upper boss, the second long arm and the third long arm are symmetrically arranged about the lower boss, the first long arm and the fourth long arm on the upper portion and the second long arm and the third long arm on the lower portion are symmetrically arranged, and the vertical distance between the first long arm and the second long arm at the left upright post end is larger than the vertical distance between the first long arm and the second long arm at the boss end.
Furthermore, the number of the connecting arms is four, each connecting arm is provided with a horizontal through groove, the length of each horizontal through groove is 2/3-3/4 of the length of each connecting arm, and the thickness of the upper wall surface and the lower wall surface of each horizontal through groove is 0.2-0.6 mm.
Furthermore, piezoceramics is the cuboid structure, piezoceramics sets up in the closed rectangle structure that encloses between last boss, lower boss, four long arms and two stands, and piezoceramics's both ends paste on two stands.
Furthermore, an upper end plate preformed hole and a load connecting hole are formed in the upper end plate of the main platform body, a lower end plate preformed hole is formed in the lower end plate of the main platform body, and a stand column preformed hole for fixing the main platform body is formed in each stand column of the main platform body.
Furthermore, there are two upper end plate preformed holes, and two upper end plate preformed holes are located at the center of the upper end plate of the main platform body.
Furthermore, eight load connecting holes are formed in the upper end plate of the main platform body, and the eight load connecting holes are uniformly distributed on the periphery of the upper end plate of the main platform body.
Furthermore, the upper boss is provided with a hinge upper end connecting hole, and the lower boss is provided with a hinge lower end connecting hole.
Furthermore, the upper end plate preformed hole is matched with the upper end connecting hole of the hinge, the lower end plate preformed hole is matched with the lower end connecting hole of the hinge, and the hinge mechanism is fixedly connected with the main table body by passing a screw through the corresponding hole.
Furthermore, the upright post of the main table body is of a quarter-cylinder structure.
Compared with the prior art, a big displacement precision positioning platform have following advantage:
1. the piezoelectric ceramic has good stability and high precision, and solves the problems of low resolution, low response frequency and the like of the traditional motor drive;
2. the horizontal displacement output by the piezoelectric ceramic is amplified and vertically output through the hinge mechanism, and the maximum displacement can reach 2 mm;
3. the hinge mechanism of this application protects piezoceramics and avoids outside pulling force, torsion and shearing force, prolongs piezoceramics's life.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic view of the general structure of a large displacement precision positioning table of the present invention.
Fig. 2 is a schematic structural diagram of the main stage body of the present invention.
Fig. 3 is a schematic structural diagram of the hinge mechanism of the present invention.
Fig. 4 is a schematic view of the hinge mechanism and the assembly of piezoelectric ceramics according to the present invention.
Description of reference numerals:
1-main table body, 2-hinge mechanism, 3-piezoelectric ceramic, 4-main table body upper end plate, 5-main table body lower end plate, 6-main table body upright post, 7-upright post preformed hole, 8-lower end plate preformed hole, 9-mechanical arm, 10-upper end plate preformed hole, 11-load connecting hole, 12-hinge upper end connecting hole, 13-flexible hinge, 14-hinge lower end connecting hole, 15-upper boss, 16-1-first long arm, 16-2-second long arm, 16-3-third long arm, 16-4-fourth long arm, 17-left upright post, 18-lower boss, 19-right upright post and 20-horizontal through groove.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1-4, a large displacement precision positioning table comprises a main table body 1, a hinge mechanism 2 and piezoelectric ceramics 3, wherein the main table body 1 comprises a main table body upper end plate 4, a main table body lower end plate 5, four main table body uprights 6 and four connecting arms 9, the main table body upper end plate 4 is arranged right above the main table body lower end plate 5, the main table body upper end plate 4 is fixedly connected with the upper ends of the four main table body uprights 6 through the four connecting arms 9, the four main table body uprights 6 are uniformly and fixedly arranged around the main table body lower end plate 5, the hinge mechanism 2 is arranged between the main table body upper end plate 4 and the main table body lower end plate 5, the upper end of the hinge mechanism 2 is fixedly connected with the main table body upper end plate 4, and the lower end of the hinge mechanism 2 is fixedly connected with the main table body lower end plate 5; the piezoelectric ceramic 3 is arranged in the hinge mechanism 2;
the piezoelectric ceramics 3 is used as a driving element, when voltage is applied to the piezoelectric ceramics 3, the displacement output by the piezoelectric ceramics is transmitted to the upper end plate 4 of the main platform body through the hinge mechanism 2, and the upper end plate 4 of the main platform body is driven to vertically move.
The hinge mechanism 2 comprises an upper boss 15, a lower boss 18, a first long arm 16-1, a second long arm 16-2, a third long arm 16-3, a fourth long arm 16-4, eight flexible hinges 13, a left upright column 17 and a right upright column 19, wherein the upper boss 15 is positioned right above the lower boss, the two upright columns are arranged at the left side and the right side of the upper boss 15, the left end and the right end of the upper boss 15 are respectively connected with one end of the first long arm 16-1 and one end of the fourth long arm 16-4 through the flexible hinges 13, the other end of the first long arm 16-1 is connected with the upper part of the left upright column 17, the other end of the fourth long arm 16-4 is connected with the upper part of the right upright column 19, the left end and the right end of the lower boss 18 are respectively connected with one end of the second long arm 16-2 and one end of the third long arm 16-3 through the flexible hinges, the other end of the second long arm 16-2 is connected with the lower part of the left upright post 17, the other end of the third long arm 16-3 is connected with the lower part of the right upright post 19, the upper boss 15, the lower boss 18, the four long arms and the two upright posts form a closed rectangular structure, the included angles between the four long arms and the horizontal plane are 5-18 degrees and can be 10 degrees, the first long arm 16-1 and the fourth long arm 16-4 are symmetrically arranged around the upper boss 15, the second long arm 16-2 and the third long arm 16-3 are symmetrically arranged around the lower boss 18, the first long arm 16-1 and the fourth long arm 16-4 at the upper part and the second long arm 16-2 and the third long arm 16-3 at the lower part are symmetrically arranged, the vertical distance between the first long arm 16-1 and the second long arm 16-2 at the left upright post end is larger than the vertical distance between the first long arm 16-1 and the second long arm 16-2 at the boss end, the arrangement ensures better amplification and vertical output of the hinge mechanism 2, and the output displacement is large.
The number of the connecting arms 9 is four, each connecting arm 9 is provided with a horizontal through groove 20, the length of each horizontal through groove 20 is 2/3-3/4 of the length of the connecting arm 9, and the thickness of the upper wall surface and the lower wall surface of each horizontal through groove 20 is 0.2-0.6 mm. By the arrangement, the connection strength of the main platform body is ensured, and the existence of the connecting arm 9 is ensured without influencing the force generated by the piezoelectric ceramic 3 by the hinge mechanism 2 to be transmitted to the upper end plate 4 of the main platform body.
Piezoelectric ceramic 3 is the cuboid structure, piezoelectric ceramic 3 sets up in the closed rectangle structure who encloses between by last boss 15, lower boss 18, four long arms and two stands, and piezoelectric ceramic 3's both ends paste on two stands. The piezoelectric ceramic 3 is firmly installed and stably transmits force.
An upper end plate preformed hole 10 and a load connecting hole 11 are formed in the upper end plate 4 of the main platform body, a lower end plate preformed hole 8 is formed in the lower end plate 5 of the main platform body, and a stand column preformed hole 7 for fixing the main platform body is formed in each stand column 6 of the main platform body.
The number of the upper end plate preformed holes 10 is two, and the two upper end plate preformed holes 10 are located in the center of the upper end plate 4 of the main platform body.
Eight load connecting holes 11 are formed in the upper end plate 4 of the main platform body, and the eight load connecting holes 11 are uniformly distributed on the periphery of the upper end plate.
The upper boss 15 is provided with a hinge upper end connecting hole 12, and the lower boss 18 is provided with a hinge lower end connecting hole 14. The upper end plate preformed hole 10 is matched with a connecting hole 12 at the upper end of the hinge, the lower end plate preformed hole 8 is matched with a connecting hole 14 at the lower end of the hinge, and the hinge mechanism is fixedly connected with the main table body by passing a screw through the corresponding hole.
The upright post 6 of the main table body is of a quarter-cylinder structure. Eight flexible hinges 13, of identical size.
The working process of the large-displacement precision positioning table is as follows: the main platform body is fixed on the fixed platform through the stand column preformed hole, then the load is installed on the upper end surface 4 of the main platform body, as the two ends of the piezoelectric ceramic 3 are fixedly connected with the left stand column 17 and the right stand column 19 respectively, when voltage is applied to the piezoelectric ceramic 3, the displacement output by the piezoelectric ceramic 3 is amplified through the flexible hinge 13 in the hinge mechanism 2 and is transmitted to the upper boss 15 of the hinge mechanism, and then is transmitted to the upper end plate 4 of the main platform body, and the upper end plate 4 of the main platform body drives the load to move vertically.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a large displacement precision positioning platform which characterized in that: comprises a main table body (1), a hinge mechanism (2) and piezoelectric ceramics (3), the main table body (1) comprises a main table body upper end plate (4), a main table body lower end plate (5), four main table body upright posts (6) and four connecting arms (9), the upper end plate (4) of the main table body is arranged right above the lower end plate (5) of the main table body, the upper end plate (4) of the main table body is fixedly connected with the upper ends of four main table body upright posts (6) through four connecting arms (9), the four main table body upright posts (6) are uniformly and fixedly arranged on the periphery of the lower end plate (5) of the main table body, the hinge mechanism (2) is arranged between an upper end plate (4) and a lower end plate (5) of the main table body, the upper end of the hinge mechanism (2) is fixedly connected with an upper end plate (4) of the main table body, and the lower end of the hinge mechanism (2) is fixedly connected with a lower end plate (5) of the main table body; the piezoelectric ceramics (3) are arranged in the hinge mechanism (2);
the piezoelectric ceramics (3) is used as a driving element, when voltage is applied to the piezoelectric ceramics (3), the displacement output by the piezoelectric ceramics is transmitted to the upper end plate (4) of the main platform body through the hinge mechanism (2), and the upper end plate (4) of the main platform body is driven to vertically move.
2. A large displacement precision positioning stage as claimed in claim 1 wherein: the hinge mechanism (2) comprises an upper boss (15), a lower boss (18), a first long arm (16-1), a second long arm (16-2), a third long arm (16-3), a fourth long arm (16-4), eight flexible hinges (13), a left upright post (17) and a right upright post (19), wherein the upper boss (15) is positioned right above the lower boss (18), the two upright posts are arranged on the left side and the right side of the upper boss (15), the left end and the right end of the upper boss (15) are respectively connected with one end of the first long arm (16-1) and one end of the fourth long arm (16-4) through one flexible hinge (13), the other end of the first long arm (16-1) is connected with the upper part of the left upright post (17), the other end of the fourth long arm (16-4) is connected with the upper part of the right upright post (19), the left end and the right end of the lower boss (18) are respectively connected with the upper part of the second long arm (16-2) through one flexible hinge One end of the second long arm (16-2) is connected with one end of the third long arm (16-3), the other end of the second long arm (16-2) is connected with the lower part of the left upright post (17), the other end of the third long arm (16-3) is connected with the lower part of the right upright post (19), a closed rectangular structure is enclosed by the upper boss (15), the lower boss (18), the four long arms and the two upright posts, the included angles between the four long arms and the horizontal plane are 5-18 degrees, the first long arm (16-1) and the fourth long arm (16-4) are symmetrically arranged relative to the upper boss (15), the second long arm (16-2) and the third long arm (16-3) are symmetrically arranged relative to the lower boss (18), the first long arm (16-1) and the fourth long arm (16-4) at the upper part are symmetrically arranged relative to the second long arm (16-2) and the third long arm (16-3) at the lower part, the vertical distance between the first long arm (16-1) and the second long arm (16-2) at the left upright end is greater than the vertical distance between the first long arm (16-1) and the second long arm (16-2) at the boss end.
3. A large displacement precision positioning stage as claimed in claim 1 wherein: the connecting arms (9) are four in number, each connecting arm (9) is provided with a horizontal through groove (20), the length of each horizontal through groove (20) is 2/3-3/4 of the length of each connecting arm (9), and the thicknesses of the upper wall surface and the lower wall surface of each horizontal through groove (20) are 0.2-0.6 mm.
4. A large displacement precision positioning stage as claimed in claim 2 wherein: piezoceramics (3) are the cuboid structure, piezoceramics (3) set up by last boss (15), lower boss (18), four long arms and two stands between enclose in the closed rectangle structure, and the both ends of piezoceramics (3) paste on two stands.
5. A large displacement precision positioning stage as claimed in claim 2 wherein: the upper end plate is characterized in that an upper end plate preformed hole (10) and a load connecting hole (11) are formed in the upper end plate (4) of the main platform body, a lower end plate preformed hole (8) is formed in the lower end plate (5) of the main platform body, and each main platform body upright post (6) is provided with an upright post preformed hole (7) for fixing the main platform body.
6. A large displacement precision positioning stage as claimed in claim 5, wherein: the two upper end plate preformed holes (10) are formed, and the two upper end plate preformed holes (10) are located in the center of the upper end plate (4) of the main platform body.
7. A large displacement precision positioning stage as claimed in claim 5, wherein: the eight load connecting holes (11) are uniformly distributed around the upper end plate (4) of the main platform body.
8. A large displacement precision positioning stage as claimed in claim 5, wherein: the upper boss (15) is provided with a hinge upper end connecting hole (12), and the lower boss (18) is provided with a hinge lower end connecting hole (14).
9. A large displacement precision positioning stage as claimed in claim 8 wherein: the upper end plate preformed hole (10) is matched with the hinge upper end connecting hole (12), the lower end plate preformed hole (8) is matched with the hinge lower end connecting hole (14), and the hinge mechanism is fixedly connected with the main table body by passing through the corresponding hole through a screw.
10. A large displacement precision positioning stage as claimed in any one of claims 1 to 9 wherein: the upright post (6) of the main table body is of a quarter-cylinder structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022088392.5U CN213352193U (en) | 2020-09-22 | 2020-09-22 | Large-displacement precision positioning table |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022088392.5U CN213352193U (en) | 2020-09-22 | 2020-09-22 | Large-displacement precision positioning table |
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| CN213352193U true CN213352193U (en) | 2021-06-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114986213A (en) * | 2022-06-20 | 2022-09-02 | 南京航空航天大学 | Flexible supporting device for thin-walled workpiece machining and self-adaptive supporting method |
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2020
- 2020-09-22 CN CN202022088392.5U patent/CN213352193U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114986213A (en) * | 2022-06-20 | 2022-09-02 | 南京航空航天大学 | Flexible supporting device for thin-walled workpiece machining and self-adaptive supporting method |
| CN114986213B (en) * | 2022-06-20 | 2023-03-24 | 南京航空航天大学 | Flexible supporting device for thin-walled workpiece machining and self-adaptive supporting method |
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