CN111022483A - Combined type rotating flexible hinge ring and rotating platform applying same - Google Patents
Combined type rotating flexible hinge ring and rotating platform applying same Download PDFInfo
- Publication number
- CN111022483A CN111022483A CN201911009956.7A CN201911009956A CN111022483A CN 111022483 A CN111022483 A CN 111022483A CN 201911009956 A CN201911009956 A CN 201911009956A CN 111022483 A CN111022483 A CN 111022483A
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- ring
- flexible hinge
- rotary
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- rigid
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- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 25
- 229910000639 Spring steel Inorganic materials 0.000 claims abstract description 20
- 238000005520 cutting process Methods 0.000 claims abstract description 10
- 239000002131 composite material Substances 0.000 claims description 32
- 230000009471 action Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 description 10
- 238000010168 coupling process Methods 0.000 description 10
- 238000005859 coupling reaction Methods 0.000 description 10
- 230000005489 elastic deformation Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000009193 crawling Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/12—Pivotal connections incorporating flexible connections, e.g. leaf springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hinges (AREA)
Abstract
The invention relates to a combined type rotary flexible hinge ring and a rotary platform applying the same, wherein the combined type rotary flexible hinge ring comprises: an aluminum alloy main body ring and a spring steel sheet; the aluminum alloy main body ring comprises a first circular ring disc, a second circular ring disc and a plurality of connecting pieces, wherein the first circular ring disc and the second circular ring disc are connected through the connecting pieces; the aluminum alloy main body ring is integrally processed and manufactured; at least one of the connecting pieces has a cutting notch arranged therein, in which the spring steel web is fixed. The combined type rotary flexible hinge ring can effectively eliminate assembly errors, improve the strength and prolong the fatigue life of the hinge ring.
Description
Technical Field
The invention relates to the technical field of rotary platforms, in particular to a composite rotary flexible hinge ring and a rotary platform applying the same.
Background
The flexible hinge has the advantages of no friction, no clearance and high sensitivity and is widely applied to the fields of precision machinery, precision measurement, micro/nano technology and the like. At present, flexible hinges on the market are mainly divided or integrated. The separated parts of the flexible hinge are processed respectively and then assembled to form the flexible hinge, and the flexible hinge can be made of high-strength materials, but has assembly errors. The integral type is generally formed by machining a block of material through wire cutting or milling, an aluminum alloy material which is easy to machine is mainly adopted, machining cost is low, assembly errors do not exist, but the service strength is difficult to guarantee, and the fatigue life of the integral type is short.
Disclosure of Invention
In the prior art, the traditional flexible hinge is mostly manufactured by adopting a separated type, and assembly errors exist during assembly of related parts, so that the working effect of the flexible hinge is influenced, and in order to reduce the assembly errors, a high-precision machine tool is required to be adopted for processing, but the cost is increased. Although the flexible hinge manufactured by integral processing can eliminate assembly errors, the flexible hinge is made of high-strength metal steel, so that the integral processing and manufacturing difficulty is high, and the processing cost is very high. In order to overcome at least one of the defects in the prior art, the invention provides a composite rotary flexible hinge ring.
In a first aspect, the present invention provides a composite rotary flexible hinge ring, comprising: an aluminum alloy main body ring and a spring steel sheet; the aluminum alloy main body ring comprises a first circular ring disc, a second circular ring disc and a plurality of connecting pieces, wherein the first circular ring disc and the second circular ring disc are connected through the connecting pieces; the aluminum alloy main body ring is integrally processed and manufactured; at least one of the connecting pieces has a cutting notch arranged therein, in which the spring steel web is fixed.
Furthermore, the connecting piece with the cutting notch and the spring steel sheet are provided with positioning holes for bolts to pass through; and a bolt penetrates through the positioning hole to be matched with the nut, so that the spring steel sheet is fixed in the aluminum alloy main body ring.
Furthermore, one of the annular discs in the aluminum alloy main body ring is provided with a step-shaped structure.
Further, the combined type rotary flexible hinge ring is symmetrically arranged.
In a second aspect, the present invention provides a rigid-flexible coupling rotary platform, including: the device comprises a base, a rigid bearing, a bearing sleeve, a core rotating platform, a rotating driver and the composite rotating flexible hinge ring; the bearing sleeve is fixed on the base; the rigid bearing is connected with the core rotating platform through the composite rotating flexible hinge ring kinematic pair; the rigid bearing is connected with the engine base through the bearing sleeve; the rotary driver is used for driving the core rotary platform to rotate.
Further, the rigid-flexible coupling rotary platform further comprises an encoder, and the encoder is used for measuring the rotation angle of the core rotary platform under any condition in real time.
Further, the rigid-flexible coupling rotary platform further comprises: a code wheel fixing piece; the encoder includes: an encoder code disc and an encoder read head; the bearing sleeve is fixed on the base; the encoder coded disc is fixed on a coded disc fixing piece, and the coded disc fixing piece is fixed with the core rotating platform together; the reading head of the encoder is fixed with the base.
Further, the rigid-flexible coupling rotary platform further comprises: a bearing outer ring clamping piece; the bearing outer ring clamping piece is fixed on the bearing sleeve; the bearing outer ring is clamped and fixed by the bearing sleeve and the bearing outer ring clamping piece; the protruding end face of the bearing inner ring is glued with the combined type rotary flexible hinge ring into a whole.
Further, the rigid-flexible coupling rotary platform further comprises: an outer circular sleeve; the rotary drive includes: a motor rotor and a motor stator; the motor stator and the outer circular sleeve are fixed together, and the outer circular sleeve is fixed on the base; the motor rotor is connected with the core rotating platform, and the motor rotor can apply driving force to the core rotating platform under the action of electromagnetic force.
Further, the rigid-flexible coupling rotary platform further comprises: a bottom cover; the bottom cover is fixed with the base through bolt connection so as to cover the encoder.
Compared with the prior art, the beneficial effects are:
1. the main body of the combined type rotary flexible hinge ring is made of aluminum alloy through integrated processing, and assembly errors can be effectively eliminated.
2. Spring steel sheets are uniformly added on the aluminum alloy main body ring and are connected together by bolts, so that the strength and the fatigue life of the aluminum alloy main body ring are increased.
3. The combined type rotary flexible hinge ring is applied to a high-precision rotary platform, can reduce the influence of positioning errors caused by friction state switching in the processes of starting, stopping and micro-rotating, and improves the positioning precision.
Drawings
FIG. 1 is a general schematic view of the present invention composite rotary flexible hinge ring.
Fig. 2 is a schematic view of the structure of the composite rotary flexible hinge ring of the present invention.
FIG. 3 is an overall schematic view of a rotary platform employing the composite rotary flexible hinge ring of the present invention.
FIG. 4 is a front cross-sectional view of a rotary platform employing the composite rotary flexible hinge ring 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 composite rotary flexible hinge ring provided by the present invention mainly comprises: the aluminum alloy main body ring 1, the spring steel sheet 2, the bolt 3 and the nut 4. Aluminum alloy main part ring 1 in the rotatory flexible hinge ring of combined type is made through the integral type and is formed, is side hollow out construction, and it includes: a first circular ring disc 101, a second circular ring disc 102 and a plurality of connecting pieces 103. The first circular ring disc 101 and the second circular ring disc 102 are connected through a plurality of connecting pieces 103. Wherein there are cutting notch 104 and locating hole in two connection pieces 103 that differ 180 degrees, also have corresponding locating hole on the spring steel sheet 2, spring steel sheet 2 connects on the cutting notch 104 of aluminum alloy main part ring 1, bolt 3 and nut 4 constitute bolted connection and connect on spring steel sheet 2 and the corresponding locating hole of aluminum alloy main part ring 1 to tightly link together spring steel sheet 2 and aluminum alloy main part ring 1, constitute combined type rotation flexible hinge ring jointly.
It has to be noted that the cutting notches may be arranged two by two as shown in fig. 1, each cutting notch differing by a half circle, but a person skilled in the art may also arrange other arrangements and numbers according to the actual situation. In addition, the spring steel sheet 2 is provided to improve the supporting rigidity, and other fixing methods can be adopted by those skilled in the art besides the fixing method using the bolt connection mentioned in the embodiment. In addition, the number of the bolts and nuts can be as shown in fig. 1, and one spring steel sheet can be fixed by a group of bolt and nut fit, or can be fixed by two groups of bolt and nut fit as shown in fig. 2, and those skilled in the art can determine the specific number according to the actual size and other needs.
Preferably, one of the annular discs in the aluminum alloy main body ring 1 is provided with a stepped structure 105 to facilitate its fixed connection with other components.
Preferably, the combined type rotary flexible hinge ring is arranged in a left-right symmetrical mode.
According to the combined type rotary flexible hinge ring, the main body aluminum alloy main body ring 1 is manufactured through integrated processing, so that the assembly error is eliminated; the aluminum alloy main body ring 1 of the combined type rotary flexible hinge ring is additionally provided with the spring steel sheet 2 to support a rigidity reinforcing structure, and the spring steel sheet 2 is connected together by bolts, so that the fatigue life of the combined type rotary flexible hinge ring is prolonged and guaranteed, the arrangement is simple in assembly, and the assembly error cannot be generated in the common machining precision. Therefore, the combined type rotary flexible hinge ring not only eliminates the assembly error of the traditional flexible hinge, but also reduces the overall cost on the premise of ensuring the fatigue life of the hinge.
The composite rotary flexible hinge ring can be applied to a rotary platform and is combined with a rigid-flexible coupling rotary platform together, and the method is as follows.
As shown in fig. 3 and 4, the rigid-flexible coupling rotary platform includes: the device comprises a base (A10), a core rotary platform (A1), an outer circle sleeve (A11), a motor rotor (A601), a motor stator (A602), a composite rotary flexible hinge ring (A2), a bearing inner ring (A301), a bearing outer ring (A302), a bearing sleeve (A4), a bearing outer ring clamping piece (A5), an encoder code wheel (A801), an encoder reading head (A802), a code wheel fixing piece (A7) and a bottom cover (A9). The bearing inner ring (A301) and the bearing outer ring (A302) form a rigid bearing, the rigid bearing is connected with the core rotating platform (A1) through a combined type rotating flexible hinge ring (A2) kinematic pair, and the core rotating platform (A1) is connected with the engine base (A10) through mutual connection among the combined type rotating flexible hinge ring (A2), the bearing and the bearing sleeve (A4). Preferably, a small recess may be provided in the core rotary platform (a1) for receiving a small portion of the composite rotary flexible hinge ring (a 2). In particular, the bearing outer ring blocking piece (A5) is fixed on the bearing sleeve (A4), the bearing sleeve (A4) is provided with a boss, and the bearing outer ring (A302) is clamped and fixed with the bearing outer ring blocking piece (A5) by means of the boss side wall of the bearing sleeve (A4). Preferably, the bearing outer ring blocking piece (A5) is fixed on the bearing sleeve (A4) through a bolt, and the fastening degree of the bearing outer ring (A302) can be adjusted through adjusting the tightness of the bolt.
As shown in fig. 4, a motor rotor (a601) and a motor stator (a602) constitute a motor. The motor stator (A602) is fixed with the outer circular sleeve (A11), and the outer circular sleeve (A11) is fixedly connected with the base (A10) through bolts; the motor rotor (A601) is connected with the core rotary platform (A1), and the motor rotor (A601) can exert driving force on the core rotary platform (A1) under the action of electromagnetic force. The driving force may elastically deform the composite rotary flexible hinge ring (a2) and thereby cause the core rotary platform (a1) to rotate along the hollow shaft. The elastic deformation reaction force of the composite rotary flexible hinge ring (A2) can be used for overcoming the friction force between the kinematic pair connected with the core rotary platform (A1), and when the elastic deformation attack force of the composite rotary flexible hinge ring (A2) is larger than the resistance force such as the static friction force between the kinematic pair connected with the core rotary platform (A1), the core rotary platform (A1) is converted from a static state to a moving state.
The rotation of the core rotation platform (a1) can be divided into two cases: a. when the elastic deformation force of the composite rotary flexible hinge ring (A2) is smaller than the static friction force and other resistance of the kinematic pair, the rotation amount of the core rotary platform (A1) is the elastic deformation amount of the kinematic pair of the composite rotary flexible hinge ring (A2); b. when the elastic deformation force of the composite rotary flexible hinge ring (A2) is larger than the static friction force of the kinematic pair and other resistance forces, the rotation amount of the core rotary platform (A1) is the superposition of the elastic deformation amount of the composite rotary flexible hinge ring (A2) kinematic pair and the rotation amount of the bearing. When the kinematic state of the kinematic pair to which the core rotary platform (a1) is connected is switched between the above conditions a and b, the difference between the static and dynamic friction coefficients of the kinematic pair to which the core rotary platform (a1) is connected causes a sudden change in resistance, a rigid impact to the rotary platform, and a frictional "creep" of the kinematic pair. The composite rotary flexible hinge ring (A2) can actively adapt to the sudden change of the frictional resistance caused by the switching of the friction state of the kinematic pair by means of the elastic deformation of the composite rotary flexible hinge ring, and the rigid impact of the sudden change of the frictional resistance on the core rotary platform (A1) is relieved. In any case, the core rotary platform (A1) can realize continuous rotary change by means of elastic deformation of the composite rotary flexible hinge ring (A2), and the influence of friction 'crawling' condition on the rotary positioning accuracy is avoided.
The encoder code disc (A801) and the encoder read head (A802) form an encoder. The code wheel (A801) is fixed on a code wheel fixing piece (A7), and the code wheel fixing piece (A7) is fixed with the core rotary platform (A1) through bolt connection, so that the code wheel (A801) of the encoder synchronously rotates along with the core rotary platform (A1); meanwhile, the encoder reading head (A802) is fixed with the base (A10) through bolt connection. Thus, the encoder can measure the rotation angle of the core rotation platform (a1) in any case in real time. The rotation angle measurement of the encoder can be used as a feedback link to form a closed-loop control system together with a motor driver and the like, so that the high-precision rotation positioning of the core rotation platform (A1) is realized. The bottom cover (A9) is fixed with the base (301) through bolt connection and covers the encoder to play a role in protection.
The composite rotary flexible hinge ring can be applied to a rotary platform and jointly combined with a rigid-flexible coupling rotary platform. If the rotary platform adopts the composite rotary flexible hinge ring provided by the invention, the rotary platform has the following advantages:
1. the friction-free flexible hinge ring is adopted to realize high-precision continuous change rotation, so that rotation shaking caused by acceleration sudden change due to friction state switching of the kinematic pair under a low-speed working condition is avoided.
2. The design of a rigid-flexible coupling rotating platform is adopted, the used flexible hinge ring can actively adapt to the friction force change of the kinematic pair by means of self elastic deformation, the influence of 'crawling' caused by the friction state switching of the kinematic pair on continuous rotation positioning is avoided, and the realization of higher positioning precision is facilitated.
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 (10)
1. A composite rotary flexible hinge ring, comprising: an aluminum alloy main body ring and a spring steel sheet;
the aluminum alloy main body ring comprises a first circular ring disc, a second circular ring disc and a plurality of connecting pieces, wherein the first circular ring disc and the second circular ring disc are connected through the connecting pieces;
the aluminum alloy main body ring is integrally processed and manufactured;
at least one of the connecting pieces has a cutting notch arranged therein, in which the spring steel web is fixed.
2. The composite rotary flexible hinge ring as claimed in claim 1, wherein said connecting piece with cutting notches and said spring steel sheet each have positioning holes for bolts to pass through;
and a bolt penetrates through the positioning hole to be matched with the nut, so that the spring steel sheet is fixed in the aluminum alloy main body ring.
3. The composite rotary flexible hinge ring as claimed in claim 2, wherein one of the circular ring disks in the aluminum alloy main body ring is provided with a stepped structure.
4. The composite rotationally flexible hinge ring as claimed in any one of claims 1 to 3, wherein the composite rotationally flexible hinge ring is arranged symmetrically.
5. A rigid-flexible coupled rotary platform, comprising: a housing, rigid bearings, bearing sleeves, a core rotary platform, a rotary drive and a composite rotary flexible hinge ring according to any one of claims 1 to 4;
the bearing sleeve is fixed on the base;
the rigid bearing is connected with the core rotating platform through the composite rotating flexible hinge ring kinematic pair;
the rigid bearing is connected with the engine base through the bearing sleeve;
the rotary driver is used for driving the core rotary platform to rotate.
6. The rigid-flexible coupled rotary platform of claim 5, further comprising an encoder for measuring in real time a rotation angle of the core rotary platform in any case.
7. The rigid-flexible coupled rotary platform of claim 6, further comprising: a code wheel fixing piece;
the encoder includes: an encoder code disc and an encoder read head;
the encoder coded disc is fixed on a coded disc fixing piece, and the coded disc fixing piece is fixed with the core rotating platform together;
the encoder reading head is fixed with the base.
8. The rigid-flexible coupled rotary platform of any one of claims 5-7, further comprising: a bearing outer ring clamping piece;
the bearing outer ring clamping piece is fixed on the bearing sleeve;
the bearing outer ring is clamped and fixed by the bearing sleeve and the bearing outer ring clamping piece;
the protruding end face of the bearing inner ring is glued with the combined type rotary flexible hinge ring into a whole.
9. The rigid-flexible coupled rotary platform of claim 8, further comprising: an outer circular sleeve;
the rotary drive includes: a motor rotor and a motor stator;
the motor stator and the outer circular sleeve are fixed together, and the outer circular sleeve is fixed on the base;
the motor rotor is connected with the core rotating platform, and the motor rotor can apply driving force to the core rotating platform under the action of electromagnetic force.
10. The rigid-flexible coupled rotary platform of claim 7, further comprising: a bottom cover; the bottom cover is fixed with the base through bolt connection so as to cover the encoder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201911009956.7A CN111022483A (en) | 2019-10-23 | 2019-10-23 | Combined type rotating flexible hinge ring and rotating platform applying same |
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CN201911009956.7A CN111022483A (en) | 2019-10-23 | 2019-10-23 | Combined type rotating flexible hinge ring and rotating platform applying same |
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CN201911009956.7A Withdrawn CN111022483A (en) | 2019-10-23 | 2019-10-23 | Combined type rotating flexible hinge ring and rotating platform applying same |
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US20170356501A1 (en) * | 2014-11-13 | 2017-12-14 | National Technology & Engineering Solutions Of Sandia, Llc | Rotation flexure with temperature controlled modal frequency |
CN109026989A (en) * | 2017-06-09 | 2018-12-18 | 中国科学院长春光学精密机械与物理研究所 | A kind of circumference guiding mechanism based on Roberts mechanism |
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2019
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Publication number | Priority date | Publication date | Assignee | Title |
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US20120154936A1 (en) * | 2010-12-17 | 2012-06-21 | Samsung Electronics Co., Ltd. | Lens Positioning Unit Of Optical System |
CN102519355A (en) * | 2011-11-25 | 2012-06-27 | 中国科学院光电技术研究所 | One-dimensional micro-translation mechanism |
US20140079469A1 (en) * | 2012-09-14 | 2014-03-20 | Raytheon Company | Anti-rotation isolator |
CN103912573A (en) * | 2014-03-27 | 2014-07-09 | 广东工业大学 | Replaceable inlaid-type flexible hinge fixing structure |
US20170356501A1 (en) * | 2014-11-13 | 2017-12-14 | National Technology & Engineering Solutions Of Sandia, Llc | Rotation flexure with temperature controlled modal frequency |
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