CN212044603U - Hollow one-dimensional precision positioning platform - Google Patents
Hollow one-dimensional precision positioning platform Download PDFInfo
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- CN212044603U CN212044603U CN201922201506.XU CN201922201506U CN212044603U CN 212044603 U CN212044603 U CN 212044603U CN 201922201506 U CN201922201506 U CN 201922201506U CN 212044603 U CN212044603 U CN 212044603U
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- flexible guide
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Abstract
The utility model provides a well hollow one-dimensional precision positioning platform designs voice coil motor and guiding mechanism for axial hollow structure, sets up guiding mechanism at the both ends that adopt voice coil motor along the axial, and guiding mechanism comprises flexible guide structure and the support that sets up at flexible guide structure both ends along the axial, and wherein flexible guide structure comprises the reed to the flexible guide unit that is radial hollow structure. When the device works, the rotor moves along the axial direction to drive the supports in the two guide mechanisms to generate axial displacement, so that the elastic reeds in the two guide mechanisms deform. Compared with the prior art, the utility model discloses a precision positioning platform has that guiding mechanism radial dimension is little, the platform is compact, does benefit to the light path and propagates, and the freedom of motion of voice coil motor other directions beyond the axial is retrained to and advantages such as bi-polar output.
Description
Technical Field
The utility model relates to a precision positioning platform technical field, in particular to cavity formula one-dimensional precision positioning platform based on flexible support.
Background
The precision positioning platform has very wide application, for example, the precision positioning platform is applied to the fields of ultra-precision machining, optical imaging, biological cell operation, microelectronic integrated manufacturing and the like. The voice coil motor has the characteristics of simple structure, high output linearity, high response speed, easy control and the like, and is gradually the main driving device of the precision positioning platform.
Because the stator and the rotor are not directly connected, the voice coil motor needs to guide the output motion of the motor through a guide mechanism. In the traditional design, rigid transmission parts such as linear bearings or sliding guide rails are mostly adopted, but because gaps, friction and abrasion inevitably exist in the transmission process, the precision positioning platform is difficult to achieve the nano motion precision during high-frequency motion.
In order to solve the problem, chinese patent document CN109848932A discloses a precision positioning platform using a voice coil motor and a flexible guide mechanism, wherein the flexible guide mechanism transfers force and motion by means of elastic deformation of a structure, and has the characteristics of no friction and no gap, thereby having high positioning precision. However, the flexible guide device has a large axial volume and cannot be used in places where the volume of the installation control is limited; on the other hand, because the rotor and the flexible guide mechanism of the voice coil motor are both in a closed design, the precision positioning platform cannot be used in the occasions needing larger light-transmitting aperture, such as precision optics, micro-measurement and the like.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical current situation, the utility model provides a one-dimensional precision positioning platform, wherein guiding mechanism's radial dimension is little, is favorable to the compactification of precision positioning platform overall dimension to voice coil motor only can produce axial motion, is retrained in the motion degree of freedom of other directions.
The utility model provides a technical scheme does: a hollow one-dimensional precision positioning platform comprises a voice coil motor and a guide mechanism; the method is characterized in that:
the voice coil motor is of an axial hollow structure and comprises a rotor and a stator; the rotor comprises an axial hollow coil holder and a coil wound on the coil holder; the stator is arranged on the periphery of the rotor, a gap exists between the stator and the rotor to form a radial magnetic field, and when certain current is introduced into the coil, the rotor moves axially;
the guide mechanism consists of a first guide mechanism and a second guide mechanism, and the first guide mechanism and the second guide mechanism have the same structure; along the axial direction, the first guide mechanism and the second guide mechanism are respectively arranged at two ends of the voice coil motor and are fixedly connected with the stator and the rotor;
the first guide mechanism is of an axial hollow structure and comprises an axial hollow support A, an axial hollow frame B and a flexible guide structure arranged between the support A and the support B, and the support A is in contact with the voice coil motor;
the flexible guide structure is an axial hollow structure formed by surrounding a plurality of same flexible guide units;
the flexible guide unit is of a radial hollow structure and consists of two elastic reeds A and spring pieces B which are the same in shape and two fixing blocks A and fixing blocks B which are the same in shape, wherein the fixing blocks A and the fixing blocks B are arranged between the elastic reeds A and the spring pieces B and are positioned at two ends of the elastic reeds A and the spring pieces B, so that the elastic reeds A and the spring pieces B are parallel;
the end face, facing the flexible guide structure, of the support A is provided with a plurality of connecting blocks, intervals exist among the connecting blocks, and each connecting block is connected with an elastic reed positioned between the fixed blocks in the flexible guide unit;
and one side of the support B facing the flexible guide structure is provided with a plurality of connecting blocks, intervals exist among the connecting blocks, and each connecting block is connected with an elastic reed positioned between the fixed blocks in the flexible guide unit.
As an implementation mode, the stator comprises an outer yoke, an inner yoke, a front end cover, a rear end cover and magnetic steel, the magnetic steel is attached to the outer yoke, a closed magnetic circuit is formed by the front end cover, the rear end cover and the inner and outer yokes, and a radial magnetic field is formed inside the voice coil motor. Preferably, a radial magnetic field is formed in the voice coil motor in an approximately uniform distribution.
As an implementation mode, the end face of the support a, which faces away from the flexible guide structure, is provided with a plurality of connecting pieces, and a space exists between the connecting pieces, so that the stator and the flexible guide structure are fixedly connected through the connecting pieces and the front end cover and the rear end cover of the stator.
As an implementation manner, the two axial end faces of the wire frame are provided with a plurality of connecting pieces, and the connecting pieces are fixedly connected with the support B in the flexible guide structure, so that the fixed connection between the rotor and the flexible guide structure is realized. As one realization mode, the connecting piece is an axial protruding structure arranged on the end face of the wire frame.
Preferably, the flexible guide units are distributed in axial center symmetry.
As one implementation, the flexible guide unit encloses a hollow cylindrical structure. Preferably, the number of the flexible guide units is four, and the flexible guide units are distributed in axial center symmetry.
Preferably, the wire frame has a hollow cylindrical structure.
Preferably, the bracket a has a hollow cylindrical structure.
Preferably, the bracket B has a hollow cylindrical structure.
Preferably, the front end cap has a hollow cylindrical structure.
Preferably, the rear end cap has a hollow cylindrical structure.
Preferably, the outer yoke, the inner yoke, the front end cover and the rear end cover are all made of Q235 carbon steel, and the magnetic steel is a neodymium iron boron permanent magnet.
Preferably, the wire frame is made of common aluminum alloy material.
Preferably, the coil is an enameled copper wire.
The utility model discloses be hollow structure with voice coil motor and guiding mechanism design, set up guiding mechanism at the both ends that adopt voice coil motor along the axial, guiding mechanism comprises flexible guide structure and the support that sets up at flexible guide structure both ends along the axial, and wherein flexible guide structure comprises the reed to the flexible guide unit that is radial hollow structure. During the operating condition, the active cell drives the support A at both ends to produce axial displacement along axial motion, and wherein the support A of one end passes through the connecting block and stretches the elastic reed to make the elastic reed take place tensile deformation, the support A of the other end passes through connecting block compression elastic reed, thereby makes the elastic reed take place compression deformation. Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses in, flexible guide structure is lower along axial rigidity ratio, and is great at radial rigidity, consequently can restrict voice coil motor's active cell and can only produce the displacement in the axial, has effectively prevented other effort that the active cell received to the influence of motor direction of motion.
(2) The utility model discloses in, voice coil motor and flexible guiding mechanism all adopt hollow structure, can not obstruct the light path and propagate, have satisfied optics application demand, have application prospect in the precision optics field.
(3) The utility model discloses in, guide structure sets up the both ends at voice coil motor to with the equal fixed connection of stator and active cell, when the active cell along axial motion, displacement deformation all takes place for the flexible guide structure at both ends, has consequently realized the bi-polar output of precision positioning platform, has increased the symmetry of structure and the flexibility that the later stage was used.
(4) The utility model discloses in, adopt the hollow flexible guide structure of axial to carry out gapless transmission to the axial motion of active cell, improved the motion precision of precision positioning platform.
(5) The utility model discloses in, guiding mechanism is axial hollow structure, has reduced its radial dimension by a wide margin, makes precision positioning platform overall structure compact.
Drawings
Fig. 1 is an overall structure diagram of a precision positioning platform in embodiment 1 of the present invention.
Fig. 2 is a partial structural view of the voice coil motor of fig. 1.
Fig. 3 is a structural view of the first guide mechanism in fig. 1.
Fig. 4 is a schematic structural view of the flexible guide unit of fig. 3.
Fig. 5 is a schematic structural view of a bobbin of the voice coil motor of fig. 1.
The reference numerals in fig. 1 to 5 are:
1-a voice coil motor; 2-a first annular guide mechanism; 3-a second annular guide mechanism; 4, forming an axial convex block; 5, forming an axial convex block; 11-inner yoke; 12-a coil; 13-magnetic steel; 14-a wire frame; 15-a first end cap; 16-an outer yoke; 17-a second end cap; 21-scaffold a; 22-scaffold B; 23-a flexible guiding unit; 24-a connector; 25-spring reed a; 26-elastic reed B; 27-fixed block A; 28-fixed block B; 29-axial protruding block; 30-groove.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, which are not intended to limit the invention, but are intended to facilitate the understanding thereof.
In this embodiment, as shown in fig. 1, the one-dimensional precision positioning platform includes a voice coil motor 1 and a guiding mechanism. The guide mechanism is composed of a first guide mechanism 2 and a second guide mechanism 3.
As shown in fig. 2, the voice coil motor is an axial hollow structure, and includes a mover and a stator. The mover includes a bobbin 14 and a coil wound around the bobbin. As shown in fig. 3, the bobbin has an axial hollow cylindrical structure, and the slot structure 30 is disposed on the outer circumferential surface for winding the coil. Two end surfaces along the axial direction are respectively provided with four axial convex blocks 29 with the same shape and size. The wire frame 14 is made of common aluminum alloy materials, and the coil is made of enameled copper wires.
The stator is arranged on the periphery of the rotor, and a gap exists between the stator and the rotor. As shown in fig. 2, the stator includes an outer yoke 16, an inner yoke 11, a magnetic steel 13, a first end cap 15, and a second end cap 17. The outer yoke 16, the inner yoke 11, the first end cover 15 and the second end cover 17 are all made of Q235 carbon steel, and the magnetic steel is a neodymium iron boron permanent magnet. The magnetic steel is attached to the outer yoke, a closed magnetic circuit is formed by the first end cover 15, the second end cover 17, the inner yoke 11 and the outer yoke 16, and a radial magnetic field which is approximately uniformly distributed is formed in the voice coil motor. When certain current is introduced into the coil, the rotor moves axially due to Lorentz force.
The first guide mechanism 2 and the second guide mechanism 3 have the same structure.
As shown in fig. 4, the first guide mechanism 2 has an axially hollow cylindrical structure. As shown in fig. 1, the first guide mechanism 2 and the second guide mechanism 3 are coaxially disposed at both ends of the voice coil motor 1. As shown in fig. 4, the first guide mechanism 2 includes an axially hollow cylindrical holder a21 and an axially hollow cylindrical holder B22, and a flexible guide structure disposed between holder a21 and holder B22. The flexible guide structure is an axial hollow cylindrical structure surrounded by four flexible guide units 23 with the same structure.
As shown in fig. 5, the flexible guiding unit 23 is a radial hollow structure, and is composed of an elastic spring a25, a spring plate 26, a fixing block a27 and a fixing block B28. The elastic reed A25 is in the same shape and size as the spring leaf B26 and is in the shape of an arc piece. And the fixed block A27 is the same as the fixed block B28 in shape and size. Fixing block A27 and fixing block B28 are arranged between spring reed A25 and spring piece B26 and fixed at two ends of spring reed A25 and spring piece B26, and spring reed A25 is parallel to spring piece B26.
As shown in fig. 4, four flexible guide units 23 are axisymmetrically arranged.
The end face of the support A facing the flexible guide structure is provided with four axial convex blocks 4 with the same shape and size at equal intervals, and each axial convex block 4 is fixedly connected with the middle part of the elastic reed B in the flexible guide unit 23. The end face of the support B facing the flexible guide structure is provided with four axial convex blocks 5 with the same shape and size at equal intervals, and each axial convex block 5 is fixedly connected with the middle part of the elastic reed A in the flexible guide unit 23.
The first end cap 15 is of hollow cylindrical configuration and the second end cap 17 is of hollow cylindrical configuration. The bracket a of the first guide mechanism is in contact with the first end cap 17 and the bracket a of the second guide mechanism is in contact with the second end cap 15.
As shown in fig. 4, four connecting pieces 24 are arranged at equal intervals on the end surface of the bracket B of the first guide mechanism, which faces away from the flexible guide structure, and are fixedly connected with the first end cover 17, so that the stator is fixedly connected with the flexible guide structure. The bracket B of the second guide mechanism is provided with four connecting pieces 24 at equal intervals on the end face back to the flexible guide structure, and the four connecting pieces are fixedly connected with the second end cover 17, so that the stator is fixedly connected with the flexible guide structure.
An axial protruding block 29 on the end face of the wire frame 14 penetrates through a reserved waist hole on the first end cover 15 and then is fixedly connected with a support A in the first guide mechanism; and an axial protruding block 29 on the end face of the wire frame 14 penetrates through a waist hole reserved on the second end cover 17 and then is fixedly connected with a support A in the second guide mechanism, so that the fixed connection of the rotor and the flexible guide structure is realized.
When the rotor works, the rotor moves along the axial direction; when the rotor moves towards the first guide mechanism along the axial direction, the support A in the second guide mechanism generates axial displacement, the elastic reed B is compressed through the axial protruding block 4, and the fixed block A and the fixed block B generate displacement towards the first guide mechanism to drive the elastic reed A to also generate deformation; meanwhile, the support A in the first guide mechanism generates axial displacement, the elastic spring piece B is stretched through the axial bulge block 4, the fixed block A and the fixed block B generate displacement towards the direction of the first guide mechanism, and the elastic spring piece A is driven to deform.
When the rotor moves towards the second guide mechanism along the axial direction, the support A in the first guide mechanism generates axial displacement, the elastic reed B is compressed through the axial protruding block 4, and the fixed block A and the fixed block B generate displacement towards the first guide mechanism to drive the elastic reed A to also generate deformation; meanwhile, the support A in the second guide mechanism generates axial displacement, the elastic spring piece B is stretched through the axial bulge block 4, the fixed block A and the fixed block B generate displacement towards the direction of the first guide mechanism, and the elastic spring piece A is driven to deform.
The above-mentioned embodiment is to the technical solution of the present invention has been described in detail, it should be understood that the above is only the specific embodiment of the present invention, not used for limiting the present invention, any modification, supplement or similar mode replacement etc. that the principle scope of the present invention is in should be included in the protection scope of the present invention.
Claims (15)
1. A hollow one-dimensional precision positioning platform comprises a voice coil motor and a guide mechanism; the method is characterized in that:
the voice coil motor is of an axial hollow structure and comprises a rotor and a stator; the rotor comprises an axial hollow coil holder and a coil wound on the coil holder; the stator is arranged on the periphery of the rotor, a gap exists between the stator and the rotor to form a radial magnetic field, and when certain current is introduced into the coil, the rotor moves axially;
the guide mechanism consists of a first guide mechanism and a second guide mechanism, and the first guide mechanism and the second guide mechanism have the same structure; along the axial direction, the first guide mechanism and the second guide mechanism are respectively arranged at two ends of the voice coil motor and are fixedly connected with the stator and the rotor;
the first guide mechanism is of an axial hollow structure and comprises an axial hollow support A, an axial hollow frame B and a flexible guide structure arranged between the support A and the support B, and the support B is in contact with the voice coil motor;
the flexible guide structure is an axial hollow structure formed by surrounding a plurality of flexible guide units with the same structure;
the flexible guide unit is of a radial hollow structure and consists of two elastic reeds A and spring pieces B which are the same in shape and two fixing blocks A and fixing blocks B which are the same in shape, wherein the fixing blocks A and the fixing blocks B are arranged between the elastic reeds A and the spring pieces B and are positioned at two ends of the elastic reeds A and the spring pieces B, so that the elastic reeds A and the spring pieces B are parallel;
the end face, facing the flexible guide structure, of the support A is provided with a plurality of connecting blocks, intervals exist among the connecting blocks, and each connecting block is connected with an elastic reed positioned between the fixed blocks in the flexible guide unit;
and one side of the support B facing the flexible guide structure is provided with a plurality of connecting blocks, intervals exist among the connecting blocks, and each connecting block is connected with an elastic reed positioned between the fixed blocks in the flexible guide unit.
2. The hollow one-dimensional precision positioning platform of claim 1, wherein: the stator comprises an outer yoke, an inner yoke, a first end cover, a second end cover and magnetic steel, the magnetic steel is attached to the outer yoke, a closed magnetic circuit is formed by the first end cover, the second end cover, the inner yoke and the outer yoke, and a radial magnetic field is formed inside the voice coil motor.
3. The hollow one-dimensional precision positioning platform of claim 1, wherein: and a radial magnetic field which is uniformly distributed is formed inside the voice coil motor.
4. The hollow one-dimensional precision positioning platform of claim 2, wherein: the end face, back to the flexible guide structure, of the support B is provided with a plurality of connecting pieces, and intervals exist among the connecting pieces, so that the connecting pieces are fixedly connected with the first end cover and the second end cover of the stator.
5. The hollow one-dimensional precision positioning platform of claim 4, wherein: the connecting piece is an axial protruding structure arranged on the end face, back to the flexible guide structure, of the support B.
6. The hollow one-dimensional precision positioning platform of claim 1, wherein: the two axial end faces of the wire frame are provided with a plurality of connecting pieces, and the wire frame is fixedly connected with a support A in the flexible guide structure through the connecting pieces.
7. The hollow one-dimensional precision positioning platform of claim 6, wherein: the connecting piece is an axial protruding structure arranged on the end face of the wire frame.
8. The hollow one-dimensional precision positioning platform of claim 1, wherein: the flexible guide units are distributed in axial center symmetry.
9. The hollow one-dimensional precision positioning platform of claim 1, wherein: the flexible guide structure is formed by surrounding a plurality of flexible guide units with the same structure into an axial hollow cylindrical structure.
10. The hollow one-dimensional precision positioning platform of claim 1, wherein: the number of the flexible guide units is four, and the flexible guide units are distributed in axial center symmetry.
11. The hollow one-dimensional precision positioning platform of any one of claims 1 to 10, wherein: the wire frame is of a hollow cylindrical structure.
12. The hollow one-dimensional precision positioning platform of claim 11, wherein: the support A is of a hollow cylindrical structure.
13. The hollow one-dimensional precision positioning platform of claim 11, wherein: the bracket B is of a hollow cylindrical structure.
14. The hollow one-dimensional precision positioning platform of claim 2, 4 or 5, wherein: the wire frame is of a hollow cylindrical structure, and the first end cover is of a hollow cylindrical structure.
15. The hollow one-dimensional precision positioning platform of claim 2, 4 or 5, wherein: the wire frame is of a hollow cylindrical structure, and the second end cover is of a hollow cylindrical structure.
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|---|---|---|---|
| CN201922201506.XU CN212044603U (en) | 2019-12-10 | 2019-12-10 | Hollow one-dimensional precision positioning platform |
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| CN201922201506.XU CN212044603U (en) | 2019-12-10 | 2019-12-10 | Hollow one-dimensional precision positioning platform |
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| CN212044603U true CN212044603U (en) | 2020-12-01 |
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