CN110281034B - Rigid-flexible coupling platform with enhanced flexible hinge group and motion platform - Google Patents
Rigid-flexible coupling platform with enhanced flexible hinge group and motion platform Download PDFInfo
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- CN110281034B CN110281034B CN201910452455.XA CN201910452455A CN110281034B CN 110281034 B CN110281034 B CN 110281034B CN 201910452455 A CN201910452455 A CN 201910452455A CN 110281034 B CN110281034 B CN 110281034B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
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Abstract
The utility model provides a take rigid-flexible coupling platform and motion platform of flexible hinge group of reinforcing, this rigid-flexible coupling platform of flexible hinge group of reinforcing includes: the system comprises a rigid frame of the motion platform, a core motion platform and a flexible hinge group; the flexible hinge set includes: a plurality of spring pieces and a plurality of gasket sets; a group of gasket groups is arranged between every two adjacent spring pieces for separation; the motion platform rigid frame is connected with the core motion platform through the flexible hinge group. The rigidity of the flexible hinge group of the rigid-flexible coupling platform is increased, the capacity of bearing large load of the guide mechanism is greatly increased, and the rigid-flexible coupling platform is suitable for design of moving platforms with different structural sizes.
Description
Technical Field
The invention relates to the technical field of high-precision motion, in particular to a rigid-flexible coupling platform with a reinforced flexible hinge set and a motion platform.
Background
The flexible hinge has the characteristics of no friction, no lubrication and the like, and is widely applied to the design of a precision motion platform. In precision motion platforms, the flexible hinges are primarily designed as guide mechanisms. In a precise motion platform, when the motion platform is started and stopped and micro-displacement is fed, the flexible hinge is used as a friction-free motion pair, and the flexible hinge mainly realizes motion through self elastic deformation. The working principle of the flexible hinge leads the motion platform based on the typical flexible hinge guide mechanism to be mainly suitable for light load occasions, and limits the application of the motion platform in heavy load occasions. In addition, the flexible hinge is repeatedly deformed for a long time in the movement process, so that cracks and even breakage of the guide mechanism are easily caused. How to improve the bearing rigidity and fatigue life of the flexible hinge guide mechanism becomes a key problem for expanding the application range of the typical guide mechanism.
To solve the above problems, the current commonly used solutions are:
1. the bearing rigidity of the guide mechanism based on the flexible hinge is enhanced by adopting air flotation, magnetic suspension and other modes. The method can effectively improve the bearing rigidity of the precision motion platform, and has the main problem of higher manufacturing and using cost.
2. According to specific use requirements, a special flexible hinge is manufactured by using a topological optimization structure design and the like. The mode can improve the bearing rigidity of the guide mechanism to a certain extent, but the designed flexible hinge is complex in structure, poor in universality and high in processing and manufacturing cost.
Disclosure of Invention
The invention provides a novel large-bearing flexible hinge guide mechanism for overcoming at least one defect in the prior art, which utilizes the characteristic that the working rigidity of a flexible hinge is in a cubic relation with the thickness of a spring piece and the bearing rigidity is in direct proportion to the cross section of the spring piece, and effectively improves the bearing capacity of a high-speed precise motion platform by adopting the rigidity superposition effect of N groups of thin spring pieces with long fatigue life.
A rigid-flexible coupling platform with a reinforced flexible hinge set, the rigid-flexible coupling platform comprising: the system comprises a rigid frame of the motion platform, a core motion platform and a flexible hinge group; the flexible hinge set includes: a plurality of spring pieces and a plurality of gasket sets; a group of gasket groups is arranged between every two adjacent spring pieces for separation; the motion platform rigid frame is connected with the core motion platform through the flexible hinge group.
Further, the flexible hinge set is arranged in the moving platform rigid frame in a direction orthogonal to the moving direction of the core moving platform in the moving platform rigid frame.
Furthermore, the flexible hinge groups are divided into two groups, and the two groups of flexible hinge groups are symmetrically arranged at two ends of the core motion platform.
Furthermore, a plurality of spring pieces of the flexible hinge group are connected with a plurality of groups of gasket groups in a bolt connection mode.
Furthermore, the plurality of spring pieces of the flexible hinge group are connected with the plurality of gasket groups in a gluing connection mode.
A precision motion platform comprises a base, a linear guide rail fixed on the base, a guide rail sliding block, the rigid-flexible coupling platform and a linear driver, wherein the rigid-flexible coupling platform is fixed on the base; and a core motion platform in the rigid-flexible coupling platform is connected with the linear driver, and the rigid frame is connected with the linear guide rail through the guide rail sliding block.
Furthermore, the precision motion platform also comprises a displacement sensor, and the displacement sensor is connected with the core motion platform and is used for measuring the displacement of the core motion platform in the motion direction.
Compared with the prior art, the beneficial effects are:
1. the flexible hinge group with the enhanced rigidity is separately processed and is detachable.
2. The design of the large-bearing flexible hinge guide mechanism is compact, the structure is simple, the processing and manufacturing cost is low, and the application range is wide.
3. The provided large-bearing flexible hinge mechanism has large working area and strong bearing capacity.
Drawings
FIG. 1 is a front cross-sectional view of the overall construction of the precision motion platform of the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
Fig. 3 is a partial cutaway view of a rigid-flexible coupling platform of the present invention.
Fig. 4 is a partially enlarged view of fig. 3.
Figure 5 is an isometric view of the flexible hinge assembly of the present invention.
FIG. 6 is an exploded view of the flexible hinge assembly of the present invention.
FIG. 7 is a full sectional view of the flexible hinge assembly of the present invention.
Fig. 8 is a working schematic diagram (at rest) of the rigid-flexible coupling platform of the present invention.
Fig. 9 is an operation principle diagram (motion state) of the rigid-flexible coupling platform of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
As shown in fig. 1 and 2, the precision motion platform comprises a base a1, a linear guide rail a6 fixed on the base, a guide rail slide block a2, a rigid-flexible coupling platform and a linear driver; the rigid-flexible coupling motion platform consists of a motion platform rigid frame A5, a core motion platform A3 and a flexible hinge group A4, and the linear driver consists of a linear motor rotor A7 and a linear motor stator A8. The core motion platform A3 in the rigid-flexible coupling motion platform is connected with a linear driver, and the motion platform rigid frame A5 is connected with a linear guide rail A2 through a guide rail slide block A6.
In one embodiment, the precision motion platform further comprises a displacement sensor coupled to the core motion platform A3 for measuring displacement of the core motion platform A3 in the direction of motion.
As shown in fig. 3 and 4, the rigid-flexible coupling platform includes: the flexible hinge group A4 comprises a moving platform rigid frame A5, a core moving platform A3 and a flexible hinge group A4, wherein the moving platform rigid frame A5 is connected with the core moving platform A3 through the flexible hinge group A4. As shown in fig. 5-7, the flexible hinge group a4 includes: the spring piece comprises a plurality of spring pieces 1 and a plurality of groups of gasket groups 2, wherein a group of gasket groups is arranged between every two adjacent spring pieces for separation. The plurality of spring pieces 1 and the plurality of groups of gasket groups 2 can be fixedly connected together by matching with connection modes such as bolts, gluing and the like. The flexible hinge group A4 is in rigid assembly connection with the core motion platform A3 and the motion platform rigid frame A5. The flexible hinge group A4 is arranged in the moving platform rigid frame A5 in the direction orthogonal to the moving direction of the core moving platform A3 in the moving platform rigid frame, so the working deformation direction of the multiple groups of spring leaves in the flexible hinge group A4 group is the same as the working direction of the core moving platform A3. It is understood that the orthogonal arrangement is only one preferred arrangement, and those skilled in the art can adopt other arrangements according to the actual elastic deformation requirement. As shown in fig. 3 and 4, the flexible hinge groups a4 are two groups, and the two groups a4 are symmetrically arranged at two ends of the core motion platform A3. Of course, the person skilled in the art can also set the number of the flexible hinge groups a4 reasonably according to the actual needs, and arrange them symmetrically at the two ends of the core motion platform A3. In addition, the person skilled in the art can also adopt an asymmetrical arrangement according to the actual needs. The flexible hinge group A4 is in rigid assembly connection with the core motion platform A3 and the motion platform rigid frame A5 by matching connection modes such as threads, gluing and the like.
The working principle of the rigid-flexible coupling motion platform is shown in fig. 8 and 9, and the flexible hinge group A4 is in rigid assembly connection with the core motion platform A3 and the motion platform rigid frame A5 through connection modes such as threads, gluing and the like. Fig. 8 shows that when the motion platform is started, due to the existence of static friction between the linear guide slider a2 and the linear guide a6, the rigid frame a5 of the motion platform has a friction "dead zone", and the core motion platform A3 drives the load-bearing flexible hinge group a4 to elastically deform under the action of driving force, so as to realize the directional displacement of the core motion platform A3. As the driving force continues to increase, the motion platform rigid frame a5 cannot begin to move until it is greater than the static friction force.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (7)
1. The utility model provides a hard and soft coupling platform of flexible hinge group is strengthened in area, hard and soft coupling platform includes: the system comprises a rigid frame of the motion platform, a core motion platform and a flexible hinge group;
the flexible hinge set includes: a plurality of spring pieces and a plurality of gasket sets;
one group of gasket groups comprises a plurality of gaskets connected in parallel;
a group of gasket groups is arranged between every two adjacent spring pieces for separation;
the motion platform rigid frame is connected with the core motion platform through the flexible hinge group;
wherein, the length of the plurality of spring pieces is equal, and the ends are aligned.
2. The rigid-flexible coupled platform of claim 1, wherein the flexible hinge set is disposed in the motion platform rigid frame in a direction orthogonal to a direction of motion of the core motion platform in the motion platform rigid frame.
3. The rigid-flexible coupled platform with the reinforced flexible hinge set according to claim 2, wherein the flexible hinge sets are two sets, and the two sets of flexible hinge sets are symmetrically arranged at two ends of the core motion platform.
4. The rigid-flexible coupling platform with the reinforced flexible hinge group as claimed in any one of claims 1 to 3, wherein the plurality of spring pieces of the flexible hinge group are connected with the plurality of gasket groups by means of bolts.
5. The rigid-flexible coupling platform with the reinforced flexible hinge group as claimed in any one of claims 1 to 3, wherein the plurality of leaf springs of the flexible hinge group are connected with the plurality of groups of gasket groups by gluing.
6. A precision motion platform, which is characterized in that the precision motion platform comprises a base, a linear guide rail fixed on the base, a guide rail slide block, a rigid-flexible coupling platform according to any one of claims 1 to 5 and a linear driver;
and a core motion platform in the rigid-flexible coupling platform is connected with the linear driver, and the rigid frame is connected with the linear guide rail through the guide rail sliding block.
7. The precision motion platform of claim 6 further comprising a displacement sensor coupled to the core motion platform for measuring displacement of the core motion platform in a direction of motion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910452455.XA CN110281034B (en) | 2019-05-28 | 2019-05-28 | Rigid-flexible coupling platform with enhanced flexible hinge group and motion platform |
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| CN201910452455.XA CN110281034B (en) | 2019-05-28 | 2019-05-28 | Rigid-flexible coupling platform with enhanced flexible hinge group and motion platform |
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| CN110281034A CN110281034A (en) | 2019-09-27 |
| CN110281034B true CN110281034B (en) | 2022-02-25 |
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| CN110941241A (en) * | 2019-10-23 | 2020-03-31 | 广东工业大学 | Rigid-flexible coupling rotary platform |
| CN110928238B (en) * | 2019-10-23 | 2022-05-13 | 广东工业大学 | Rigid-flexible coupling rotary platform and control method thereof |
| CN111251260B (en) * | 2019-12-12 | 2023-05-16 | 广东工业大学 | Easily-maintained rigid-flexible coupling platform structure and multi-degree-of-freedom motion platform formed by same |
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| FR1492788A (en) * | 1965-07-20 | 1967-08-25 | Soudure Elec Languepin | Mechanical erosion machining method and device |
| JP2001274223A (en) * | 2000-03-23 | 2001-10-05 | Hitachi Ltd | Moving table apparatus |
| CN207474079U (en) * | 2017-09-26 | 2018-06-08 | 广东工业大学 | A kind of big carrying flexible hinge guiding mechanism |
| CN108962336B (en) * | 2018-05-22 | 2021-01-05 | 郑州轻工业学院 | Two-dimensional parallel flexible micro-motion platform based on piezoelectric drive |
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| CN203843811U (en) * | 2014-05-20 | 2014-09-24 | 广东工业大学 | Adjustable rigidity and frequency one-dimensional micro-motion platform based on principle of stress stiffening |
| CN207723892U (en) * | 2017-12-19 | 2018-08-14 | 广东工业大学 | A kind of motion platform of the single driving Coupled Rigid-flexible work area of expansion |
| CN208593262U (en) * | 2018-08-03 | 2019-03-12 | 四川航天职业技术学院 | Light bus steel plate spring assembly |
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