WO2011129918A2 - Magnetic-assisted linear bearing - Google Patents
Magnetic-assisted linear bearing Download PDFInfo
- Publication number
- WO2011129918A2 WO2011129918A2 PCT/US2011/025221 US2011025221W WO2011129918A2 WO 2011129918 A2 WO2011129918 A2 WO 2011129918A2 US 2011025221 W US2011025221 W US 2011025221W WO 2011129918 A2 WO2011129918 A2 WO 2011129918A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bracket
- shaft
- linear bearing
- magnets
- bracket cylinder
- Prior art date
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 14
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 15
- 239000000725 suspension Substances 0.000 claims abstract description 10
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- 239000000969 carrier Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D15/00—Suspension arrangements for wings
- E05D15/06—Suspension arrangements for wings for wings sliding horizontally more or less in their own plane
- E05D15/0621—Details, e.g. suspension or supporting guides
- E05D15/0626—Details, e.g. suspension or supporting guides for wings suspended at the top
- E05D15/0647—Details, e.g. suspension or supporting guides for wings suspended at the top on sliding blocks
-
- 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
- F16C39/00—Relieving load on bearings
- F16C39/06—Relieving load on bearings using magnetic means
- F16C39/063—Permanent magnets
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D15/00—Suspension arrangements for wings
- E05D15/06—Suspension arrangements for wings for wings sliding horizontally more or less in their own plane
- E05D15/0621—Details, e.g. suspension or supporting guides
- E05D2015/0695—Magnetic suspension or supporting means
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefor
- E05Y2201/46—Magnets
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/60—Suspension or transmission members; Accessories therefor
- E05Y2201/622—Suspension or transmission members elements
- E05Y2201/64—Carriers
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
- E05Y2800/40—Physical or chemical protection
- E05Y2800/412—Physical or chemical protection against friction
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
- E05Y2800/67—Materials; Strength alteration thereof
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
- E05Y2900/51—Application of doors, windows, wings or fittings thereof for vehicles for railway cars or mass transit vehicles
-
- 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
- F16C29/00—Bearings for parts moving only linearly
- F16C29/02—Sliding-contact bearings
Definitions
- This invention relates to linear bearings useful for enclosing a shaft or rod from which a sliding door is hung, for example, a door on a mass transit vehicle.
- linear bearings used on door systems for rail vehicles have about 75N drag associated with them that creates friction requiring larger motors to move the doors to the open and closed positions.
- these linear bearings have many moving parts, for example, ball bearings that assist in translating the door along a rod or shaft mounted to the vehicle. Grease and other lubricants are used to keep these linear bearings running smoothly, although contamination is a problem causing failure, increased friction, and pitting of the rod or shaft.
- the linear bearings are generally enclosed in a bracket having a flat attachment plate for attaching the bracket to the vehicle door and a cylindrical housing for mounting the linear bearing.
- Typical linear bearings are expensive and costly to maintain in outdoor environments where large amounts of dust and other airborne contaminants are present.
- a door suspension system comprises a horizontally suspended ferromagnetic shaft; a nonmagnetic bracket comprising a bracket cylinder for enclosing a linear bearing, and an attached bracket hanger plate for securing a door panel.
- a nonmagnetic cylindrical linear bearing is sized to slide into the bracket cylinder and over the shaft.
- a cylindrical permanent magnet is positioned in at least one of the spaced bores of the bracket cylinder and a ferromagnetic plug in the other if not holding a permanent magnet.
- a door suspension system comprising a horizontally suspended ferromagnetic shaft; a nonmagnetic bracket comprising a bracket cylinder for enclosing a linear bearing and an attached bracket hanger plate for securing a door panel; a nonmagnetic cylindrical linear bearing sized to slide into the bracket cylinder and over the shaft; means to pin the cylindrical linear bearing to the bracket cylinder, at least two spaced bores in the upper surface of the bracket cylinder; at least two spaced bores in the upper surface of the cylindrical linear bearing arranged so as to align with the spaced bores in the bracket cylinder; cylindrical permanent magnets positioned in the spaced bores of the bracket cylinders having opposite poles facing the ferromagnetic shaft; and a ferromagnetic armature extending across the exposed ends of the cyhndrical permanent magnets to complete the magnetic circuit through the shaft and magnets.
- the linear bearing is a self-aligning bearing.
- the distance of cyhndrical magnets from the shaft is adjustable by nonmagnetic washer-like shims place on the stop rim.
- the bores in the bracket cylinder are threaded and a cylinder with external threads is arranged to carry the cylindrical magnets within the bore enabling adjustment of the clearance between the magnets and shaft.
- the bores in the bracket cylinder are provided with a rim to prevent the magnets from contacting and clamping to the shaft.
- the magnets are neodymium iron boron magnets.
- FIG. 1 is a schematic section view through a magnetic-assisted linear bearing, according to one embodiment of this invention.
- FIG. 2 is a schematic section view through a magnetic-assisted linear bearing, according to another embodiment of this invention.
- the present invention has no roller bearings or other moving parts.
- a low friction sleeve is used in combination with one or more magnets that attract a rod or shaft about which the magnetic-assisted linear bearing encircles. The magnets are attracted to the rod and offset the force downward of the load to produce a significantly reduced load on the
- the magnets may be sized and positioned to adjust the magnetic pull on the rod and lesson the friction in the linear bearing. Where the load may change or otherwise be applied in another direction, the magnets may be adjustable via a threaded earlier or by placement of shims. It is possible to reduce the factional drag from about 74N to ION and contamination is not nearly as much of a factor, nor is maintenance.
- a linear bearing of the self-aligning variety although this invention would apply to ordinary linear bearings as well.
- the bearing 10 is positioned within a bracket cylinder or sleeve 12 that encircles a shaft 14 from which may be hung a door or the like from brackets 16 secured to the bracket cylinder or sleeve.
- the shaft is comprised of magnetic stainless steel, for example.
- the linear bearing is secured in the sleeve by O-rings 18 that allow for the self-aligning of the bearing within the sleeve.
- the sleeve and the linear bearing are comprised of a nonmagnetic metal, such as aluminum.
- Two bores 22 have been bored to pass radially through the upper side of the sleeve.
- Two internally threaded bores 24 which may be brought to alignment with the bores 22 in the sleeve pass radially through the linear bearing extending to the shaft 14.
- a cylindrical magnet earner with external threads 26 passes through bores 22 and engages the internal threads of the bores 24 in the linear bearing 10.
- High- strength permanent magnets 30 Secured within the magnet carriers are high- strength permanent magnets 30.
- the second magnet may be replaced by a ferromagnetic plug. The magnets in the two magnet carriers have opposite polarity with reference to the shaft.
- a ferromagnetic armature 32 Positioned to abut the external magnet poles is a ferromagnetic armature 32 that allows for a low permeability path for completion of the magnetic field through both magnets and the shaft.
- the threads allow for adjusting the clearance between the shaft and the magnets which adjusts the pull on the shaft.
- FIG. 2 the embodiment shown is similar to that shown in Fig. 1 except the magnet earners and the bores in the linear bearing are not threaded. The distance between the magnets and the shaft is adjusted with shims 34 placed between a rim on the magnet carrier and the sleeve.
- the rod or shaft was magnetic induction hardened ground stainless steel with a diameter of 25mm, which is currently in use in the London Underground door systems.
- the outside diameter of the linear bearing was 40mm.
- the magnets were neodymium iron boron permanent magnets having a diameter of 20mm and an axial length of 25mm.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Power-Operated Mechanisms For Wings (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2794543A CA2794543C (en) | 2010-04-14 | 2011-02-17 | Magnetic-assisted linear bearing |
EP11769231.9A EP2558344A4 (en) | 2010-04-14 | 2011-02-17 | Magnetic-assisted linear bearing |
AU2011241029A AU2011241029B2 (en) | 2010-04-14 | 2011-02-17 | Magnetic-assisted linear bearing |
BR112012025507A BR112012025507A2 (en) | 2010-04-14 | 2011-02-17 | door suspension system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/759,860 US8274188B2 (en) | 2010-04-14 | 2010-04-14 | Magnetic-assisted linear bearing |
US12/759,860 | 2010-04-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2011129918A2 true WO2011129918A2 (en) | 2011-10-20 |
WO2011129918A3 WO2011129918A3 (en) | 2012-01-12 |
Family
ID=44787712
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2011/025221 WO2011129918A2 (en) | 2010-04-14 | 2011-02-17 | Magnetic-assisted linear bearing |
Country Status (6)
Country | Link |
---|---|
US (1) | US8274188B2 (en) |
EP (1) | EP2558344A4 (en) |
AU (1) | AU2011241029B2 (en) |
BR (1) | BR112012025507A2 (en) |
CA (1) | CA2794543C (en) |
WO (1) | WO2011129918A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014032068A1 (en) * | 2012-08-27 | 2014-03-06 | Knorr-Bremse Gesellschaft Mit Beschränkter Haftung | Swinging-sliding door module for a rail vehicle |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120224797A1 (en) * | 2011-03-05 | 2012-09-06 | Wei-Lin Chang | Pre-stressed air bearing |
CN106460424B (en) * | 2014-04-24 | 2018-06-01 | 阿普赛特技术有限公司 | For current-controlled door system |
KR102442729B1 (en) * | 2018-02-02 | 2022-09-13 | 중산 오파이크 하드웨어 프로덕츠 컴퍼니 리미티드 | Linear motor structure for flexible sliding doors |
CN111997994A (en) * | 2020-08-13 | 2020-11-27 | 山东科瑞机械制造有限公司 | Hanging bearing of screw conveyer |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4698876A (en) | 1985-03-20 | 1987-10-13 | Shinko Electric Co., Ltd. | Door apparatus partially supported by a magnetic mechanism |
US5907890A (en) | 1996-04-23 | 1999-06-01 | Molteni & C. S.P.A. | Guiding device for sliding doors |
US7013605B2 (en) | 2000-12-22 | 2006-03-21 | Inventio Ag | Door suspension apparatus |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2602708A (en) * | 1950-03-24 | 1952-07-08 | Norton Co | Bearing combination |
US3537762A (en) * | 1967-05-26 | 1970-11-03 | Alois Lodige | Guide system with precision adjustment for telescopic components |
US4090265A (en) * | 1975-12-02 | 1978-05-23 | Heinz Georg Baus | Partition wall for wet chambers |
US4473259A (en) | 1980-12-24 | 1984-09-25 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Linear magnetic bearings |
DE4016948A1 (en) * | 1990-05-25 | 1991-11-28 | Geze Gmbh & Co | Contactless magnetic guidance system esp. for sliding door - exploits mutual repulsion of like poles of radial permanent magnets at edges of mouldings and guide |
JPH06329375A (en) | 1993-05-20 | 1994-11-29 | Toshiba Corp | Elevator car door drive device |
US5501526A (en) * | 1993-06-15 | 1996-03-26 | Nsk Ltd. | Sliding bearing |
DE4403639A1 (en) * | 1994-02-05 | 1995-08-10 | Festo Kg | Fluidically actuated feed unit |
JP4361169B2 (en) * | 1999-06-23 | 2009-11-11 | Thk株式会社 | Sliding guide unit |
EP1217160A3 (en) | 2000-12-22 | 2010-04-14 | Inventio Ag | Door suspension system |
EP1217161A3 (en) | 2000-12-22 | 2010-04-07 | Inventio Ag | Door suspension assembly |
-
2010
- 2010-04-14 US US12/759,860 patent/US8274188B2/en active Active
-
2011
- 2011-02-17 AU AU2011241029A patent/AU2011241029B2/en not_active Ceased
- 2011-02-17 EP EP11769231.9A patent/EP2558344A4/en not_active Withdrawn
- 2011-02-17 CA CA2794543A patent/CA2794543C/en active Active
- 2011-02-17 WO PCT/US2011/025221 patent/WO2011129918A2/en active Application Filing
- 2011-02-17 BR BR112012025507A patent/BR112012025507A2/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4698876A (en) | 1985-03-20 | 1987-10-13 | Shinko Electric Co., Ltd. | Door apparatus partially supported by a magnetic mechanism |
US5907890A (en) | 1996-04-23 | 1999-06-01 | Molteni & C. S.P.A. | Guiding device for sliding doors |
US7013605B2 (en) | 2000-12-22 | 2006-03-21 | Inventio Ag | Door suspension apparatus |
Non-Patent Citations (1)
Title |
---|
See also references of EP2558344A4 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014032068A1 (en) * | 2012-08-27 | 2014-03-06 | Knorr-Bremse Gesellschaft Mit Beschränkter Haftung | Swinging-sliding door module for a rail vehicle |
US9266540B2 (en) | 2012-08-27 | 2016-02-23 | Knorr-Bremse Systeme Fur Schienenfahrzeuge Gmbh | Swinging-sliding door module for a rail vehicle |
Also Published As
Publication number | Publication date |
---|---|
US8274188B2 (en) | 2012-09-25 |
AU2011241029A1 (en) | 2012-10-25 |
AU2011241029B2 (en) | 2014-09-04 |
WO2011129918A3 (en) | 2012-01-12 |
CA2794543A1 (en) | 2011-10-20 |
EP2558344A4 (en) | 2017-11-08 |
US20110254396A1 (en) | 2011-10-20 |
CA2794543C (en) | 2013-12-17 |
EP2558344A2 (en) | 2013-02-20 |
BR112012025507A2 (en) | 2017-11-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2011241029B2 (en) | Magnetic-assisted linear bearing | |
CN1142359C (en) | Door suspension system | |
CN106795939B (en) | Vibration absorber for damping vibrations occurring in a wind power installation | |
CN1360133A (en) | Door suspension assembly | |
US9593519B2 (en) | Magnetic levitation system for doors and windows | |
US20070024139A1 (en) | Magnetic bearing assembly using repulsive magnetic forces | |
CN107606041B (en) | Hybrid damper formed by combining magneto-rheological damper and electric vortex damper | |
CN104747652A (en) | Quasi-zero stiffness vibration isolator connected with magnetic spring in parallel through spiral spring | |
US20180222565A1 (en) | Electric actuator for a marine steering system | |
CN1853975A (en) | Permanent-magnet suspender | |
CN102667217A (en) | A magnetic braking device | |
JPH08303100A (en) | Sliding door with guide section having little friction | |
CN210371778U (en) | Semi-active quasi-zero rigidity adjustable vibration isolator | |
WO2019014566A1 (en) | Mirror bearing for an interferometer | |
US7466052B2 (en) | Bearing assembly having a mechanical component and using attractive magnetic forces | |
CN114857194A (en) | Electromagnetic negative stiffness device | |
CN111022544A (en) | Eddy current damping device using lever mechanism | |
RU2698271C1 (en) | Magnetically-unloaded hub | |
CN110759218A (en) | Movable hanging platform and hanging device for balancing gravity and hanging trolley chassis comprising same | |
US20240068290A1 (en) | Eddy current braking devices for moving doors and other structures | |
AU2022405894B2 (en) | A sliding door system | |
CN215630860U (en) | Magnetic suspension intelligent movement partition wall | |
RU1796501C (en) | Transport system | |
JP2002061709A (en) | Engine mount | |
EP1217161A3 (en) | Door suspension assembly |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11769231 Country of ref document: EP Kind code of ref document: A2 |
|
ENP | Entry into the national phase |
Ref document number: 2794543 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011769231 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2011241029 Country of ref document: AU Date of ref document: 20110217 Kind code of ref document: A |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112012025507 Country of ref document: BR |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01E Ref document number: 112012025507 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 112012025507 Country of ref document: BR Kind code of ref document: A2 Effective date: 20121005 |