CN204061433U - A kind of precision positioning drive end pre-tightening apparatus - Google Patents
A kind of precision positioning drive end pre-tightening apparatus Download PDFInfo
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- CN204061433U CN204061433U CN201420350591.0U CN201420350591U CN204061433U CN 204061433 U CN204061433 U CN 204061433U CN 201420350591 U CN201420350591 U CN 201420350591U CN 204061433 U CN204061433 U CN 204061433U
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- capacitive transducer
- pretension
- ball
- tightening apparatus
- pretension block
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Abstract
The utility model discloses a kind of precision positioning drive end pre-tightening apparatus, comprise locating platform, driver, capacitive transducer, capacitive transducer support, pretension block, film force snesor; The middle part of locating platform offers a chute, and described pretension block, film force snesor and driver are placed in this chute successively; Capacitive transducer support is fixed on locating platform, and the support body side of capacitive transducer support is axially arranged with three connecting rods connected successively by submissive hinge, and the end face of capacitive transducer and the upper side of pretension block are parallel to each other and have gap; Locating platform is also provided with the two-stage pre-tightening apparatus for carrying out pretension to pretension block.Meet the association areas such as precision positioning, precise and ultraprecise machining, accurate operation, precision measuremnt and MEMS to the needs of precision positioning drive end pre-tightening apparatus.This device technique means are simple and easy to do, have outstanding substantive features and significant progress relative to prior art.
Description
Technical field
The utility model relates to the pre-tightening apparatus in the technology such as micro-nano operation, micro-nano measurement and minute manufacturing, particularly relates to a kind of precision positioning drive end pre-tightening apparatus.
Background technique
Precisely locating platform is the key component of the technology such as micro-nano operation, micro-nano measurement and minute manufacturing, plays an important role in the association areas such as precise and ultraprecise machining, accurate operation, precision measuremnt and MEMS.Driver can be divided into mechanical type and electromechanical by driving principle, and the latter can be divided into again piezoelectric-actuated, thermic dynamic formula, electrostatically actuated formula, Electromagnetically actuated formula, magnetostriction type and voice coil motor etc.Wherein piezoelectric ceramic actuator has the resolution of Subnano-class and the speed of response of Millisecond, and larger driving force, linear range of movement and rigidity etc., and the closed loop control system of drive end is built by built-in SGS (Strain Gauge Sensor) sensor, and then overcome self hysteresis characteristic, realizing highi degree of accuracy and metastable output, is the desirable driver of one of precision positioning.
Chinese patent CN20031416314A is down twisted by Cock screw, by dynamic wedge toward pressing down, and then promotes quiet wedge and carrys out pretension piezoelectric ceramic actuator.Chinese patent CN2012102619821A is down twisted by screw, by dynamic wedge toward pressing down, and then promotes quiet wedge and carrys out pretension piezoelectric ceramic actuator.Chinese patent 2012202884405U and CN2012102954323A precisely promotes perpendicular dynamic voussoir by turning micrometer, and then promotion traversing voussoir carrys out pretension piezoelectric constant.Chinese patent CN2013103671374A promotes initiatively wedge block movement by rotating threaded adjusting bar, and then the driven wedge block movement promoting to contact with it realizes the pretension stacking formula piezoelectric ceramic actuator.Above voussoir or have based on the various firmly beforehand meanses that voussoir improves value and pretension precision that problem is pretension amount and self-locking stability cannot detect.In actual use, especially the athletic meeting of the long-time high frequency of driver brings the change of pretension amount, and then affects the actual input shift value of precisely locating platform at this driving direction.And be contact of incline plane between a pair voussoir, transmit pretightening force by inclined-plane, machining accuracy is difficult to the precision of strict guarantee plane, can not determine the position of pretightening force effect, more cannot ensure that the line of action of equivalent pretightening force is along driver medial axis, namely can produce lateral force and moment of flexure.
When Chinese patent CN2013203476938U and 2013103410817A is by rotating housing screw to exit axis, the head of housing screw is close to fixed block gradually, block is fixed with this, piezoelectric constant is tightly pressed in the recess sidewall of body by the reaction force of the two, reaches pretensioning effect.Although this patent can avoid lateral force, but the moment of torsion produced when rotating cannot be eliminated, the pretension amount micro-nano variation that any reason produces can not measured or feedback compensation, actual use in the especially long-time high frequency of driver motion under pretension precision and stability can not ensure.
Summary of the invention
The purpose of this utility model is the shortcoming and defect overcoming above-mentioned prior art, a kind of precision positioning drive end pre-tightening apparatus is provided, meets part precision positioning occasion drive end highi degree of accuracy, high accuracy, high stability, displacement that is long-time and high frequency export requirement.
The utility model is achieved through the following technical solutions:
A kind of precision positioning drive end pre-tightening apparatus, comprises locating platform 6, driver 14, capacitive transducer 4, capacitive transducer support 3, pretension block 12, film force snesor 13;
The middle part of described locating platform 6 offers a chute, and described pretension block 12, film force snesor 13 and driver 14 are placed in this chute successively;
Described capacitive transducer support 3 is fixed on locating platform 6, and the middle part of capacitive transducer support 3 is relative with pretension block 12; The axis of this capacitive transducer support 3 and the axially mutually vertical of chute;
The support body side of described capacitive transducer support 3, is axially arranged with three connecting rod 3-1 connected successively by submissive hinge, and the intermediate connecting rod of these three connecting rod 3-1 is used for fixed capacity sensor 4; Capacitive transducer 4 is by the bolt 4-1 pretension on capacitive transducer support 3 or fixing; The end face of capacitive transducer 4 and the upper side of pretension block 12 are parallel to each other and have gap;
The middle part of the support body opposite side of described capacitive transducer support 3, be provided with two micrometers 5 offseted with the intermediate connecting rod of above-mentioned three connecting rod 3-1; By reversing the yardstick of these two micrometers 5, change primary clearance and the parallelism of capacitive transducer 4 and pretension block 12;
Described locating platform 6 is also provided with the two-stage pre-tightening apparatus for carrying out pretension to driver 14.
Described two-stage pre-tightening apparatus to comprise with driver 14, pretension block 12 on same axis and the first ball 11 offseted successively, one-level jackscrew 10, second ball 9, secondary jackscrew 8;
Described pretension block 12 and the contact position of the first ball 11 are that face contacts, and the contact position of one-level jackscrew 10 and the first ball 11 is point cantact;
The contact position of described one-level jackscrew 10 and the second ball 9 is point cantact.
Described pretension block 12 and the contact position of the first ball 11 are that face contacts, and wherein said contact arranges the hemispherical dimples corresponding to the first ball 11 circumferential surface on pretension block 12.
Described secondary jackscrew 8 and the contact position of the second ball 9 are that face contacts, and wherein said contact arranges the hemispherical dimples corresponding to the second ball 9 circumferential surface on secondary jackscrew 8.
Reflector bracket 2 is equipped with at the top of described pretension block 12, reflector bracket 2 is provided with reflecting mirror 1.
The utility model, relative to prior art, has following advantage and effect:
1, two-stage pre-tightening apparatus is used to carry out pretension to driver 14 (referring to piezoelectric ceramic actuator), guarantee that pretension amount can not occur submicron order and above change along with the long-time high frequency motion of driver 14, improve precision, the Stability and veracity of driver output displacement;
2, have employed face contact (bulb contact) or point cantact that first, second ball (steel ball) realizes the ball in pretension process in two-stage pre-tightening apparatus respectively, be easy to determine pretightening force point of action and action direction, ensure pretension precision, avoid producing lateral force and moment of flexure in pretension process, can eliminate jackscrew (referring to one-level jackscrew 10 or secondary jackscrew 8) simultaneously and rotate the moment of torsion and lateral force that produce, protection piezoelectric constant class etc. can bear the very limited precision positioning driver of moment of torsion;
3, capacitive transducer 4 device is adopted to read the moving displacement of pretension block 12 in real time, the i.e. value of pretension amount, and feed back to control system (not shown), after completing pretension, real-Time Compensation is carried out in the change of pretension amount, guarantees the stable of corresponding mechanism input end input displacement.If the residue that pretension amount changing value exceeds driver can provide elongation, then control system quits work and automatic alarm;
4, the force entering end of one-level jackscrew 10 and secondary jackscrew 8 has the rectangular slits regulated for screw-driver, the coarse adjustment of pretension amount is carried out by screw-driver, use pretension amount accurate adjustment pole handle (structure is shown in Fig. 6) of particular design to carry out the accurate adjustment joint of pretension amount, there is simple, convenient, easy effect;
5, film force snesor 13 is used to measure the size of pretightening force, simultaneously also can measure the value of driver 14 ouput force in whole working procedure and feed back to controller, and then calculating driver 14 dynamic rate and the locating platform 6 input rigidity at this driving direction in conjunction with driver 14 output displacement and locating platform 6 input displacement in the direction in which;
The intermediate connecting rod 3-1 of the sensor stand 3 support body opposite side 6, using two micrometers 5 (or fine thread screw) to promote to be made up of submissive hinge, with the Distance geometry fine adjustment parallelism therebetween of precise initialization capacitive transducer 4 with pretension block 12, clearance gauge or vernier calliper can be used to detect, be convenient to adjust capacitive transducer 4 range and measuring accuracy;
7, reflecting mirror 1 is arranged on above pretension block 12, two-frequency laser interferometer (not shown) is used to measure the displacement of pretension block 12, correct or demarcate capacitive transducer 4, or complete separately the monitoring of pretension amount, obtain the precise displacement value of pretension block 12, can measure or monitor the impact that pretension block 12 rotates the straight-line displacement measuring accuracy on capacitive transducer 4 simultaneously;
8, jackscrew (referring to one-level jackscrew 10 and secondary jackscrew 8) adopts fine thread, and also can process tooth voluntarily apart from less jackscrew, tightening precision is higher, and stability is better;
9, use without the need to all component, pretension block 12, ball and one-level jackscrew also can be adopted separately to complete pretension, and miscellaneous part provides additional function, and is mutually independent, therefore can select corresponding assembly according to actual needs, and flexibility is high simultaneously.
10, the first ball 11, one-level jackscrew 10, second ball 9, the secondary jackscrew 8 that offset successively with pretension block 12; Same axis meets the association areas such as precision positioning, precise and ultraprecise machining, accurate operation, precision measuremnt and MEMS to the needs of precision positioning drive end pre-tightening apparatus.
In sum, this device technique means are simple and easy to do, have outstanding substantive features and significant progress relative to prior art.
Accompanying drawing explanation
Fig. 1 is the utility model surface structure schematic diagram.
Fig. 2 is the utility model vertical section structure schematic diagram.
Fig. 3 is pretension block structure schematic diagram in Fig. 1.
Fig. 4 is for carrying capacitive transducer supporting structure schematic diagram in 1.
Fig. 5 is capacitive transducer and capacitive transducer holder combination schematic diagram thereof in Fig. 1.
Fig. 6 is the pretension amount accurate adjustment joint handle arrangement schematic diagram of special construction.
Embodiment
Below in conjunction with specific embodiment, the utility model is more specifically described in detail.
Embodiment
As shown in figs. 1 to 6.The utility model precision positioning drive end pre-tightening apparatus, comprises locating platform 6, driver 14, capacitive transducer 4, capacitive transducer support 3, pretension block 12, film force snesor 13;
The middle part of described locating platform 6 offers a chute, and described pretension block 12, film force snesor 13 and driver 14 are placed in this chute successively; The bottom of locating platform 6 is provided with pad 7.
Described capacitive transducer support 3 is fixed on locating platform 6, and the middle part of capacitive transducer support 3 is relative with pretension block 12; The axis of this capacitive transducer support 3 and the axially mutually vertical of chute;
The support body side of described capacitive transducer support 3, is axially arranged with three connecting rod 3-1 connected successively by submissive hinge, and the intermediate connecting rod of these three connecting rod 3-1 is used for fixed capacity sensor 4; Capacitive transducer 4 is by the bolt 4-1 pretension on capacitive transducer support 3 or fixing; The end face of capacitive transducer 4 and the upper side of pretension block 12 are parallel to each other and have gap; Meanwhile, the side on this pretension block 12 needs level and smooth, clean.
The middle part of the support body opposite side of described capacitive transducer support 3, be provided with two micrometers 5 offseted with the intermediate connecting rod of above-mentioned three connecting rod 3-1; By reversing the yardstick of these two micrometers 5, change primary clearance and the parallelism of capacitive transducer 4 and pretension block 12; The submissive hinge transmission distortion of capacitive transducer support 3, comes initial distance and the fine adjustment parallelism therebetween of control capacittance sensor 4 and pretension block 12 by two micrometers 5.
As mentioned above, film force snesor 13 between pretension block 12 and driver 14, for reading the size of the active force along driving direction.
Described locating platform 6 is also provided with the two-stage pre-tightening apparatus for carrying out pretension to driver 14.
Described two-stage pre-tightening apparatus to comprise with driver 14, pretension block 12 on same axis and the first ball 11 offseted successively, one-level jackscrew 10, second ball 9, secondary jackscrew 8;
Described pretension block 12 and the contact position of the first ball 11 are that face contacts, and the contact position of one-level jackscrew 10 and the first ball 11 is point cantact;
The contact position of described one-level jackscrew 10 and the second ball 9 is point cantact.
Described pretension block 12 and the contact position of the first ball 11 are that face contacts, and wherein said contact arranges the hemisphere hemispherical dimples 12-2 corresponding to the first ball 11 circumferential surface on pretension block 12.
Described secondary jackscrew 8 and the contact position of the second ball 9 are that face contacts, and wherein said contact arranges the hemisphere hemispherical dimples corresponding to the second ball 9 circumferential surface on secondary jackscrew 8.
Reflector bracket 2 is equipped with at the top of pretension block 12, reflector bracket 2 is provided with reflecting mirror 1.The moving displacement of pretension block 12 is measured by reflecting mirror 1.On market, the common precision as two-frequency laser interferometer XL-80 can reach 1nm, can be used for monitoring and feed back the nano level change of pretension amount.
When reversing one-level jackscrew 10 with screw-driver, it promotes the first ball 11 and pretension block 12 moves forward, and this is the coarse adjustment stage.
The moving displacement of pretension block 12, namely pretension amount reads in real time by capacitive transducer 4, laser interferometer (not shown), when pretension amount reaches near predetermined value, adopt the pretension amount of particular design as shown in Figure 6 essence regulating handle to replace screw-driver to reverse one-level jackscrew 10, this is the accurate adjustment joint stage.Reverse secondary jackscrew 8 with screw-driver, promote the second ball 9 to lock one-level jackscrew 10.
As mentioned above, just the utility model can be realized preferably.
Mode of execution of the present utility model is not restricted to the described embodiments; other are any do not deviate from Spirit Essence of the present utility model and principle under do change, modification, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (5)
1. a precision positioning drive end pre-tightening apparatus, is characterized in that: comprise locating platform, driver, capacitive transducer, capacitive transducer support, pretension block, film force snesor;
The middle part of described locating platform offers a chute, and described pretension block, film force snesor and driver are placed in this chute successively;
Described capacitive transducer support is fixed on locating platform, and the middle part of capacitive transducer support is relative with pretension block; The axis of this capacitive transducer support and the axially mutually vertical of chute;
The support body side of described capacitive transducer support, is axially arranged with three connecting rods connected successively by submissive hinge, and the intermediate connecting rod of these three connecting rods is used for fixed capacity sensor; Capacitive transducer is by the tools for bolts ' pretension on capacitive transducer support or fixing; The end face of capacitive transducer and the upper side of pretension block are parallel to each other and have gap;
The middle part of the support body opposite side of described capacitive transducer support, be provided with two micrometers offseted with the intermediate connecting rod of three connecting rods; By reversing the yardstick of these two micrometers, change primary clearance and the parallelism of capacitive transducer and pretension block;
Described locating platform is also provided with the two-stage pre-tightening apparatus for carrying out pretension to driver.
2. precision positioning drive end pre-tightening apparatus according to claim 1, is characterized in that: described two-stage pre-tightening apparatus to comprise with pretension block on same axis and the first ball offseted successively, one-level jackscrew, the second ball, secondary jackscrew;
Described pretension block and the contact position of the first ball are that face contacts, and the contact position of one-level jackscrew and the first ball is point cantact;
The contact position of described one-level jackscrew and the second ball is point cantact.
3. precision positioning drive end pre-tightening apparatus according to claim 2, is characterized in that: described pretension block and the contact position of the first ball are that face contacts, and wherein said contact arranges the hemispherical dimples corresponding to the first ball circumferential surface on pretension block.
4. precision positioning drive end pre-tightening apparatus according to claim 2, it is characterized in that: described secondary jackscrew and the contact position of the second ball are that face contacts, wherein said contact arranges the hemispherical dimples corresponding to the second ball circumferential surface on secondary jackscrew.
5. precision positioning drive end pre-tightening apparatus according to claim 2, is characterized in that: reflector bracket is equipped with at the top of pretension block, and reflector bracket is provided with reflecting mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420350591.0U CN204061433U (en) | 2014-06-27 | 2014-06-27 | A kind of precision positioning drive end pre-tightening apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420350591.0U CN204061433U (en) | 2014-06-27 | 2014-06-27 | A kind of precision positioning drive end pre-tightening apparatus |
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| Publication Number | Publication Date |
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| CN204061433U true CN204061433U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420350591.0U Withdrawn - After Issue CN204061433U (en) | 2014-06-27 | 2014-06-27 | A kind of precision positioning drive end pre-tightening apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088871A (en) * | 2014-06-27 | 2014-10-08 | 华南理工大学 | Precision positioning drive-end pre-tightening device |
-
2014
- 2014-06-27 CN CN201420350591.0U patent/CN204061433U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088871A (en) * | 2014-06-27 | 2014-10-08 | 华南理工大学 | Precision positioning drive-end pre-tightening device |
| WO2015196741A1 (en) * | 2014-06-27 | 2015-12-30 | 华南理工大学 | Precise-locating drive end pre-tightening device |
| CN104088871B (en) * | 2014-06-27 | 2016-03-02 | 华南理工大学 | A kind of precision positioning drive end pre-tightening apparatus |
| US10030962B2 (en) | 2014-06-27 | 2018-07-24 | South China University Of Technology | Precision-positioning drive pre-tightening device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141231 Effective date of abandoning: 20160302 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |