CN101793312A - Magneto-rheological stepless speed changer - Google Patents
Magneto-rheological stepless speed changer Download PDFInfo
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- CN101793312A CN101793312A CN 201010121882 CN201010121882A CN101793312A CN 101793312 A CN101793312 A CN 101793312A CN 201010121882 CN201010121882 CN 201010121882 CN 201010121882 A CN201010121882 A CN 201010121882A CN 101793312 A CN101793312 A CN 101793312A
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- magnetic isolation
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- 230000005389 magnetism Effects 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 abstract 10
- 238000010892 electric spark Methods 0.000 abstract 1
- 210000003414 extremity Anatomy 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The invention relates to a multi-disc type magneto-rheological stepless speed changer which mainly comprises a magnetic isolation hub, an input shaft, an output shaft, a driving friction plate, a driven friction plate, magnetic exciting coils and magnetic isolation rings; wherein the driving friction plate and the driven friction plate are respectively fixed on an outer magnetic isolation circular ring and the magnetic isolation hub through the magnetic isolation rings; a right magnetic conducting lateral plate is connected with the input shaft through a big magnetic isolation circular ring and a left magnetic conducting lateral plate; the output shaft is connected with the driven friction plate and the magnetic isolation hub; magneto-rheological fluid is sealed between the driving friction plate and the driven friction plate through a seal ring; the magnetic exciting coils are fixed on two bearing seats through a magnetic conducting shell, the left magnetic isolation lateral plate and the right magnetic isolation lateral plate in a motionless way, and the driving friction plate and the driving friction plate are in interleaved matching and isolated through the magnetic isolation rings. The shear yield stress of the magneto-rheological fluid can be changed by adjusting the electric current of the magnetic exciting coils, therefore, the speed difference between a driving shaft and a driven shaft is changed, and the stepless speed change is further realized. The invention has the advantages of simple structure, no electric sparks, high transmission torque and large transmission power.
Description
Technical field
The present invention relates to a kind of speed changer, the magneto-rheological stepless speed changer that is used for the machinery speed governing that especially a kind of transmitting torque is bigger.
Background technique
Traditional liquid viscosity transmission is the fluid drive technology that a kind of shear action of utilizing oil film is come transmitting torque, and it is may command transmitting torque size based on law of friction in the newton by changing oil slick thickness.Characteristics are that speed governing is highly sensitive, and good stability, output speed can be realized step-less adjustment in 0～100% scope.But it needs huge oil supply system and complex control apparatus, and is bulky and cost an arm and a leg.
Magnetic flow liquid is a kind of intellectual material, can produce significant rheological properties under the effect in magnetic field.Advance over 10 years,, also begin fast development in transmission engineering field because its superior rheological properties has had certain application at aspects such as vibration controls.External magnetorheological patent has: U.S.Pantent 5896965 has introduced a kind of double plate magnetic rheological clutch; U.S.Pantent5823309 introduces a kind of multi-disc type magnetic rheological clutch; Domestic also have many relevant patents: CN00104451.6 discloses a kind of radially self-pressurizing clutch with magnetic rheologic liquid, CN01137376.6 discloses a kind of centrifugal magnetofluid clutch, CN1928381A discloses a kind of magnetorheological fan clutch, and CN201013802Y discloses the magnetorheological braking device of a kind of hot tube.Above patent all is the introductions to magnetic rheological clutch and break, the patent of at present domestic and international magneto-rheological stepless speed changer seldom, CN1523251A discloses a kind of magneto-rheological stepless speed changer of V shape rotor structure, adopt double V-shaped structure, simple in structure, transmitting torque is less, be applicable to industrial small-power occasion, but then inapplicable for the more powerful occasion of need transmission, because its transmitted power is less, do not consider the heat dissipation characteristics of device in addition; Adopt wiper mechanism, coil can be rotated, reduced equipment volume, but adopt brush to be easy to generate electrical spark, have the occasion of requirement then to have narrow limitation to electrical spark for colliery etc.
Summary of the invention
Technical problem: the purpose of this invention is to provide a kind of simple in structure, brushless, the transmitting torque height, transmitted power is big, the magneto-rheological stepless speed changer that using effect is good.
Technological scheme: magneto-rheological stepless speed changer of the present invention, comprise active friction plate, from movable friction plate, also comprise the magnetic conductive shell of establishing groove by interior, a left side that is located at the magnetic conductive shell both sides is every magnetic side plate and the right casing that constitutes every the magnetic side plate, in being fixedly connected with, the left side of casing establishes the left shaft holder of bearing on the magnetic side plate, be provided with input shaft in the left shaft holder, the right side of casing is fixedly connected with the right bearing seat of inner bearing and outer bearing every magnetic side plate inboard, be provided with in the right bearing seat with input shaft on same axis, the output shaft that span is provided with, the inner end of output shaft is provided with every magnetic hub, every the excircle of magnetic hub be provided be provided with at interval from movable friction plate from the movable friction plate magnetism resistent ring, and be provided with interleaving and cooperate from movable friction plate, the active friction plate magnetism resistent ring of active friction plate is set at interval, the excircle of active friction plate magnetism resistent ring is provided with outer every the magnetic annulus, the medial extremity of input shaft is provided with and is fixed on outer left magnetic conduction side plate every magnetic annulus left side, the right bearing seat of output shaft is provided with and is fixed on outer right magnetic conduction side plate every magnetic annulus right side, left magnetic conduction side plate, right magnetic conduction side plate and surrounding active friction plate every the magnetic annulus outward, inject the seal chamber of magnetic flow liquid in the movable friction plate gap; Be provided with field coil in the groove of magnetic conductive shell.
Described is I shape every magnetic hub; Described left magnetic conduction side plate, right magnetic conduction side plate interior edge face are equipped with the shoulder that is enclosed within on the magnetic hub inner edge, and shoulder is provided with seal ring.
Beneficial effect: the present invention adopt active friction plate and outside movable friction plate is fixed on by magnetism resistent ring respectively every the magnetic annulus with on magnetic hub, right magnetic conduction side plate is by linking to each other with input shaft with left magnetic conduction side plate every the magnetic annulus greatly, output shaft is connected with from movable friction plate, every magnetic hub, magnetic flow liquid is sealed in active friction plate and between movable friction plate by seal ring, field coil passes through magnetic conductive shell, a little magnetic conductive shell and a left side are every the magnetic side plate, the right side is fixed on the bearing support every the magnetic side plate, the axle head baffle plate will be fixed on the output shaft every magnetic hub, active friction plate and interleave cooperation from movable friction plate separates by magnetism resistent ring respectively.Field coil is connected on the bearing support and maintains static, and the field coil inner ring directly communicates with air.Just can change the shear yield stress of magnetic flow liquid by the electric current of regulating field coil, thereby change the speed difference between driving shaft and the driven shaft, and then realize stepless change.Because support is I-shaped structure from movable friction plate every magnetic hub, heat radiation is convenient; Magnetic conduction side plate that utilization links to each other with output shaft and magnetism resistent ring self rotation heat radiation, heat dissipation characteristics is good, and slip power is increased, and the slippage scope increases, and transmitting torque is big, can be according to transmitting torque grade size, increase and decrease friction plate quantity; Field coil is fixed on the pedestal by connecting plate, does not need equipment such as brush, and noise is less, and no electrical spark can be used on the occasion that spark is had specific (special) requirements, is particularly useful under the coal mine.It is simple in structure, good heat dissipation, and no electrical spark, the transmitting torque height, transmitted power is big, has practicability widely.
Description of drawings
Accompanying drawing is a magneto-rheological stepless speed changer structural representation of the present invention.
Among the figure: 1-is every magnetic hub, 2-axle head baffle plate, 3-input shaft, 4-bearing, 5-bearing support, a 6-left side be every the magnetic side plate, 7-left side magnetic conduction side plate, 8-active friction plate magnetism resistent ring, 9-is outer every the magnetic annulus, 10-magnetic conductive shell, 11-field coil, 12-active friction plate, 13-is from movable friction plate, the 14-inner bearing, and the 15-right side is every the magnetic side plate, the right magnetic conduction side plate of 16-, 17-is from the movable friction plate magnetism resistent ring, 18-bearing support, 19-output shaft, 20-back-up ring, the 21-outer bearing, 22-seal ring, back-up ring-23.
Embodiment
Below in conjunction with accompanying drawing the present invention and an embodiment are further described:
Magneto-rheological stepless speed changer of the present invention is mainly by every magnetic hub 1, input shaft 3, output shaft 19, active friction plate 12, form from movable friction plate 13, bearing and bearing support, field coil 11, magnetism resistent ring, casing; Wherein casing by the interior magnetic conductive shell 10 of establishing groove, be located at magnetic conductive shell 10 both sides a left side every magnetic side plate 6 with rightly constitute every magnetic side plate 15.In being fixedly connected with, the left side of casing establishes the left shaft holder 5 of bearing 4 on magnetic side plate 6, be provided with input shaft 3 in the left shaft holder 5, the right side of casing is fixedly connected with the right bearing seat 18 of inner bearing 14 and outer bearing 21 every magnetic side plate 15 inboards, be provided with in the right bearing seat 18 with input shaft 3 on same axis, the output shaft 19 that span is provided with, the inner end of output shaft 19 is provided with I shape every magnetic hub 1, excircle every magnetic hub 1 is provided with from movable friction plate magnetism resistent ring 17 and active friction plate magnetism resistent ring 8, the excircle of active friction plate magnetism resistent ring 8 is provided with outer every magnetic annulus 9, active friction plate 12 is by being fixed on magnetic hub 1 from movable friction plate magnetism resistent ring 17, be fixed on greatly on magnetic annulus 9 by active friction plate magnetism resistent ring 8 from movable friction plate 13, active friction plate 12 cooperates with interleaving from movable friction plate 13, the medial extremity of input shaft 3 is provided with and is fixed on outer left magnetic conduction side plate 7 every magnetic annulus 9 left sides, the right bearing seat 18 of output shaft 19 is provided with and is fixed on outer right magnetic conduction side plate 16 every magnetic annulus 9 right sides, left magnetic conduction side plate 7, right magnetic conduction side plate 16 and surrounding active friction plate 12 every magnetic annulus 9 outward, inject the seal chamber of magnetic flow liquid in movable friction plate 13 gaps; Left side magnetic conduction side plate 7, right magnetic conduction side plate 16 interior edge faces are equipped with the shoulder that is enclosed within on magnetic hub 1 inner edge, and shoulder is provided with seal ring 22; Active friction plate magnetism resistent ring 8 and being installed on the shoulder of right magnetic conduction side plate 16 and left magnetic conduction side plate 7 medial extremitys every magnetic annulus 9 outward is equipped with field coil 11 in the groove of magnetic conductive shell 10, the inner ring of magnetic conductive shell 10 and leave the space outward between magnetic annulus 9.Right magnetic conduction side plate 16 is by linking to each other with input shaft 3 with left magnetic conduction side plate 7 every magnetic annulus 9 greatly, is provided with stationary axle end-stopping plate 2 every the end face of magnetic hub 1, is provided with back-up ring 23 between magnetic hub 1 and inner bearing 22.Active friction plate 12 and from movable friction plate 13 by outside separate every magnetic annulus 9, field coil 11 is connected on left shaft holder 5 and the right bearing seat 18 by right magnetic conduction side plate 16 and left magnetic conduction side plate 7 and maintains static, the coil inner ring directly communicates with air, heat radiation is convenient.
Claims (3)
1. magneto-rheological stepless speed changer, comprise active friction plate (12), from movable friction plate (13), it is characterized in that: also comprise the magnetic conductive shell (10) of establishing groove by interior, a left side that is located at magnetic conductive shell (10) both sides is every magnetic side plate (6) and the right casing that constitutes every magnetic side plate (15), in being fixedly connected with, the left side of casing establishes the left shaft holder (5) of bearing (4) on magnetic side plate (6), be provided with input shaft (3) in the left shaft holder (5), the right side of casing is fixedly connected with the right bearing seat (18) of inner bearing (23) and outer bearing (21) every magnetic side plate (15) inboard, be provided with in the right bearing seat (18) with input shaft (3) on same axis, the output shaft (19) that span is provided with, the inner end of output shaft (19) is provided with every magnetic hub (1), every the excircle of magnetic hub (1) be provided be provided with at interval from movable friction plate (13) from movable friction plate magnetism resistent ring (17), and be provided with interleaving and cooperate from movable friction plate (13), the active friction plate magnetism resistent ring (8) of active friction plate (12) is set at interval, the excircle of active friction plate magnetism resistent ring (8) is provided with outer every magnetic annulus (9), the medial extremity of input shaft (3) is provided with and is fixed on outer left magnetic conduction side plate (7) every magnetic annulus (9) left side, the right bearing seat (18) of output shaft (19) is provided with and is fixed on outer right magnetic conduction side plate (16) every magnetic annulus (9) right side, left magnetic conduction side plate (7), right magnetic conduction side plate (16) and surrounding active friction plate (12) every magnetic annulus (9) outward, inject the seal chamber of magnetic flow liquid in movable friction plate (13) gap; Be provided with field coil (11) in the groove of magnetic conductive shell (10).
2. magneto-rheological stepless speed changer according to claim 1 is characterized in that: described is I shape every magnetic hub (1).
3. magneto-rheological stepless speed changer according to claim 1 is characterized in that: described left magnetic conduction side plate (7), right magnetic conduction side plate (16) interior edge face are equipped with the shoulder that is enclosed within on magnetic hub (1) inner edge, and shoulder is provided with seal ring (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010121882 CN101793312A (en) | 2010-02-11 | 2010-02-11 | Magneto-rheological stepless speed changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010121882 CN101793312A (en) | 2010-02-11 | 2010-02-11 | Magneto-rheological stepless speed changer |
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| Publication Number | Publication Date |
|---|---|
| CN101793312A true CN101793312A (en) | 2010-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201010121882 Withdrawn CN101793312A (en) | 2010-02-11 | 2010-02-11 | Magneto-rheological stepless speed changer |
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| CN (1) | CN101793312A (en) |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102146968A (en) * | 2011-02-18 | 2011-08-10 | 中国矿业大学 | Multiple-disc type magnetorheological brake |
| CN102278446A (en) * | 2011-06-20 | 2011-12-14 | 中国矿业大学 | Soft startup device using magnetorheological fluid |
| CN102287499A (en) * | 2011-06-17 | 2011-12-21 | 中国矿业大学 | Magnetorheological fluid-based controllable stepless speed change system |
| CN102297213A (en) * | 2011-08-30 | 2011-12-28 | 江苏大学 | Multi-plate magnetorheological soft start device |
| CN102494100A (en) * | 2011-11-16 | 2012-06-13 | 奇瑞汽车股份有限公司 | Torque management device |
| CN102506094A (en) * | 2011-10-27 | 2012-06-20 | 中国矿业大学 | Multi-disc type fine-pitch magnetorheological clutch |
| CN102562979A (en) * | 2012-01-19 | 2012-07-11 | 中国矿业大学 | Magnetorheological fluid transmission device with variable power |
| CN102937151A (en) * | 2012-11-08 | 2013-02-20 | 华南农业大学 | Stepless speed controlling method and stepless speed controller |
| CN103322143A (en) * | 2013-07-05 | 2013-09-25 | 重庆大学 | Reversible magnetorheological transmission |
| CN103603891A (en) * | 2013-11-14 | 2014-02-26 | 南京理工大学 | Multi-piece magnetorheological fluid electromagnetic clutch |
| CN104896058A (en) * | 2015-04-22 | 2015-09-09 | 无锡市飞度自动化设备有限公司 | Magnetic-liquid mixed type speed adjusting device |
| CN105299086A (en) * | 2015-10-16 | 2016-02-03 | 中国矿业大学 | Water cooling type multi-plate magneto-rheological clutch |
| CN106059245A (en) * | 2016-07-08 | 2016-10-26 | 上海纳铁福传动系统有限公司 | Electromagnetic torque manager |
| CN106286642A (en) * | 2015-06-08 | 2017-01-04 | 东北大学 | Clearance adjustable type magnetic current changing brake device |
| CN108582150A (en) * | 2018-06-12 | 2018-09-28 | 浙江工业大学 | A kind of submissive joint of composite excitation formula robot based on magnetorheological fluid |
| CN108757883A (en) * | 2018-06-27 | 2018-11-06 | 东北大学 | A kind of magnetorheological limited slip differential of multi-cartridge and a kind of automobile |
| CN109227595A (en) * | 2018-06-12 | 2019-01-18 | 浙江工业大学 | A kind of submissive joint composite excitation coupling device of robot based on magnetorheological fluid |
| CN111594214A (en) * | 2020-05-29 | 2020-08-28 | 中国铁建重工集团股份有限公司 | Full-face tunneling machine and dual-drive system thereof |
| WO2020239300A1 (en) * | 2019-05-25 | 2020-12-03 | Robert Bosch Gmbh | Magnetorheological device |
| CN114294777A (en) * | 2022-02-11 | 2022-04-08 | 珠海格力电器股份有限公司 | Fan blade assembly, air purifier and control method of air purifier |
| US20220154786A1 (en) * | 2020-11-13 | 2022-05-19 | Quoc Hung NGUYEN | Bidirectional magneto-rheological actuator |
| CN114877042A (en) * | 2022-05-25 | 2022-08-09 | 中国矿业大学 | Slip-free continuously variable transmission |
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| US5823309A (en) * | 1997-05-23 | 1998-10-20 | General Motors Corporation | Magnetorheological transmission clutch |
| US5896965A (en) * | 1997-06-02 | 1999-04-27 | General Motors Corporation | Magnetorheological fluid fan clutch |
| DE19939356A1 (en) * | 1998-08-19 | 2000-05-04 | Dana Corp | Infinitely variable transmission |
| CN1523251A (en) * | 2003-09-08 | 2004-08-25 | 重庆大学 | Magnetorheological continuously variable transmission |
| CN1928381A (en) * | 2006-09-29 | 2007-03-14 | 石家庄铁道学院 | Magnetic rheopectic solution fan clutch |
| CN201013802Y (en) * | 2007-01-16 | 2008-01-30 | 重庆大学 | Hot pipe type magnetic current changing brake device |
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2010
- 2010-02-11 CN CN 201010121882 patent/CN101793312A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5823309A (en) * | 1997-05-23 | 1998-10-20 | General Motors Corporation | Magnetorheological transmission clutch |
| US5896965A (en) * | 1997-06-02 | 1999-04-27 | General Motors Corporation | Magnetorheological fluid fan clutch |
| DE19939356A1 (en) * | 1998-08-19 | 2000-05-04 | Dana Corp | Infinitely variable transmission |
| CN1523251A (en) * | 2003-09-08 | 2004-08-25 | 重庆大学 | Magnetorheological continuously variable transmission |
| CN1928381A (en) * | 2006-09-29 | 2007-03-14 | 石家庄铁道学院 | Magnetic rheopectic solution fan clutch |
| CN201013802Y (en) * | 2007-01-16 | 2008-01-30 | 重庆大学 | Hot pipe type magnetic current changing brake device |
Cited By (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102146968B (en) * | 2011-02-18 | 2012-09-05 | 中国矿业大学 | Multiple-disc type magnetorheological brake |
| CN102146968A (en) * | 2011-02-18 | 2011-08-10 | 中国矿业大学 | Multiple-disc type magnetorheological brake |
| CN102287499A (en) * | 2011-06-17 | 2011-12-21 | 中国矿业大学 | Magnetorheological fluid-based controllable stepless speed change system |
| CN102287499B (en) * | 2011-06-17 | 2013-04-24 | 中国矿业大学 | Magnetorheological fluid-based controllable stepless speed change system |
| CN102278446A (en) * | 2011-06-20 | 2011-12-14 | 中国矿业大学 | Soft startup device using magnetorheological fluid |
| CN102297213A (en) * | 2011-08-30 | 2011-12-28 | 江苏大学 | Multi-plate magnetorheological soft start device |
| CN102297213B (en) * | 2011-08-30 | 2013-05-08 | 江苏大学 | Multi-plate magnetorheological soft start device |
| CN102506094A (en) * | 2011-10-27 | 2012-06-20 | 中国矿业大学 | Multi-disc type fine-pitch magnetorheological clutch |
| CN102494100A (en) * | 2011-11-16 | 2012-06-13 | 奇瑞汽车股份有限公司 | Torque management device |
| CN102494100B (en) * | 2011-11-16 | 2014-10-01 | 奇瑞汽车股份有限公司 | Torque management device |
| CN102562979A (en) * | 2012-01-19 | 2012-07-11 | 中国矿业大学 | Magnetorheological fluid transmission device with variable power |
| CN102937151A (en) * | 2012-11-08 | 2013-02-20 | 华南农业大学 | Stepless speed controlling method and stepless speed controller |
| CN102937151B (en) * | 2012-11-08 | 2015-08-19 | 华南农业大学 | A kind of stepless speed adjusting gear |
| CN103322143B (en) * | 2013-07-05 | 2015-09-09 | 重庆大学 | A kind of magnetorheological transmission capable of reversing |
| CN103322143A (en) * | 2013-07-05 | 2013-09-25 | 重庆大学 | Reversible magnetorheological transmission |
| CN103603891A (en) * | 2013-11-14 | 2014-02-26 | 南京理工大学 | Multi-piece magnetorheological fluid electromagnetic clutch |
| CN104896058A (en) * | 2015-04-22 | 2015-09-09 | 无锡市飞度自动化设备有限公司 | Magnetic-liquid mixed type speed adjusting device |
| CN104896058B (en) * | 2015-04-22 | 2017-03-08 | 无锡煤矿机械股份有限公司 | A kind of liquid mixed arrangements for speed regulation of magnetic |
| CN106286642B (en) * | 2015-06-08 | 2018-10-23 | 东北大学 | Clearance adjustable type magnetic current changing brake device |
| CN106286642A (en) * | 2015-06-08 | 2017-01-04 | 东北大学 | Clearance adjustable type magnetic current changing brake device |
| CN105299086A (en) * | 2015-10-16 | 2016-02-03 | 中国矿业大学 | Water cooling type multi-plate magneto-rheological clutch |
| CN106059245A (en) * | 2016-07-08 | 2016-10-26 | 上海纳铁福传动系统有限公司 | Electromagnetic torque manager |
| CN106059245B (en) * | 2016-07-08 | 2018-11-16 | 上海纳铁福传动系统有限公司 | electromagnetic torque manager |
| CN108582150A (en) * | 2018-06-12 | 2018-09-28 | 浙江工业大学 | A kind of submissive joint of composite excitation formula robot based on magnetorheological fluid |
| CN109227595A (en) * | 2018-06-12 | 2019-01-18 | 浙江工业大学 | A kind of submissive joint composite excitation coupling device of robot based on magnetorheological fluid |
| CN108757883A (en) * | 2018-06-27 | 2018-11-06 | 东北大学 | A kind of magnetorheological limited slip differential of multi-cartridge and a kind of automobile |
| WO2020239300A1 (en) * | 2019-05-25 | 2020-12-03 | Robert Bosch Gmbh | Magnetorheological device |
| CN111594214A (en) * | 2020-05-29 | 2020-08-28 | 中国铁建重工集团股份有限公司 | Full-face tunneling machine and dual-drive system thereof |
| US20220154786A1 (en) * | 2020-11-13 | 2022-05-19 | Quoc Hung NGUYEN | Bidirectional magneto-rheological actuator |
| US11603891B2 (en) * | 2020-11-13 | 2023-03-14 | Ho Chi Minh City University Of Technology (Hutech) | Bidirectional magneto-rheological actuator |
| CN114294777A (en) * | 2022-02-11 | 2022-04-08 | 珠海格力电器股份有限公司 | Fan blade assembly, air purifier and control method of air purifier |
| CN114877042A (en) * | 2022-05-25 | 2022-08-09 | 中国矿业大学 | Slip-free continuously variable transmission |
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Open date: 20100804 |