EP0631971B1 - Porteur magnétique à aimants permanents - Google Patents

Porteur magnétique à aimants permanents Download PDF

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Publication number
EP0631971B1
EP0631971B1 EP94420115A EP94420115A EP0631971B1 EP 0631971 B1 EP0631971 B1 EP 0631971B1 EP 94420115 A EP94420115 A EP 94420115A EP 94420115 A EP94420115 A EP 94420115A EP 0631971 B1 EP0631971 B1 EP 0631971B1
Authority
EP
European Patent Office
Prior art keywords
rotor
permanent magnets
magnetic carrier
fixed part
pole pieces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94420115A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0631971A1 (fr
Inventor
Pierre Doyelle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Braillon Magnetique SA
Original Assignee
Braillon Magnetique SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Braillon Magnetique SA filed Critical Braillon Magnetique SA
Publication of EP0631971A1 publication Critical patent/EP0631971A1/fr
Application granted granted Critical
Publication of EP0631971B1 publication Critical patent/EP0631971B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/04—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by magnetic means

Definitions

  • the present invention relates to a magnetic carrier with permanent magnets, comprising a fixed part with two pole pieces symmetrical with respect to a vertical median plane, joined to each other by non-magnetic elements, and a rotor of generally cylindrical shape mounted rotating around a horizontal axis between the two pole pieces of the fixed part, the rotor comprising permanent magnets inserted between two pieces of mild steel, and being movable in rotation between an angular position "on” and an angular position "off” using an operating device.
  • the present invention aims to avoid these drawbacks, by providing a magnetic carrier which is simple and economical to produce, but powerful and suitable for handling large objects, and which can be easily retained against the tilting effect.
  • the two pole pieces of the fixed part move away from one another downward, the distance between their respective lower ends, constituting active poles in the "on" position, thus being important, and the rotor has a structure asymmetrical, its two mild steel parts being uneven.
  • the asymmetry of the rotor thus makes it possible to arrange the two pole pieces of the fixed part so as to increase the width of the magnetic carrier at its base, which is advantageous for taking objects of relatively large dimensions.
  • This configuration also improves the retention at tilting, when switching the device between the "on” and "off” positions.
  • the two pole pieces of the fixed part of the magnetic carrier are joined to each other, at their top and at their base, by two non-magnetic, horizontal connection plates, with an upper link plate of smaller width, and a lower link plate of larger width.
  • the fixed part also comprises two non-magnetic closing flanges, of trapezoidal shape, fixed vertically against the two pole pieces and the two connecting plates, and carrying the bearings of the rotor.
  • the assembly of the magnetic carrier according to the invention thus has a characteristic shape, of trapezoidal section, both compact, well suited to the function of the carrier, and aesthetic.
  • the two opposite mild steel parts of the rotor have unequal sections, in the form of circular segments, one relatively large and the other relatively small.
  • the permanent magnets, inserted between these two mild steel parts are advantageously magnets of the "rare earth” type, in particular "Neodymium-Iron-Boron” magnets. It will also be noted that the asymmetry of the permanent magnet rotor allows the passage from the "on” position to the "off” position, and vice versa, by a rotation of this rotor around its horizontal axis by an angle less than 90 °. , while the switching angle is 90 ° in traditional designs with perfectly symmetrical rotor structure.
  • the operating device provided for controlling the "on-off” switching comprises, outside the fixed part of the magnetic carrier, a radial tube with handle which is linked in rotation with the rotor and in which is slidingly mounted a push rod pushed outwards by a spring, the push rod carrying a finger or a pin which passes through at least one longitudinal lumen of the aforementioned tube and which is engaged in a fixed hollow part, of circular outline having at minus a notch for indexing the rotor in its angular "on” position.
  • the aforementioned recessed part is preferably a recessed area in the external face of one of the closing flanges of the fixed part.
  • the magnetic carrier shown in the drawing comprises a fixed part, comprising two pole pieces 1 and 2 and two connecting plates 3 and 4, which houses a rotor of generally cylindrical shape 5 mounted rotating around a horizontal axis 6.
  • the two pole pieces 1 and 2 are arranged symmetrically with respect to a vertical median plane 7.
  • the two pole pieces 1 and 2 move away from each other. one from the other down, their upper parts 8 being relatively close together and their lower ends 9, separated from each other, lying in the same horizontal plane 10.
  • the upper connecting plate 3 rectangular and relatively narrow, is welded at 11 to the respective upper parts 8 of the two pole pieces 1 and 2. In the middle of this upper connecting plate 3, which extends horizontally, is fixed a ring of lifting 12.
  • the lower, relatively wide rectangular connection plate 4 is welded at 13 to the two pole pieces 1 and 2, at a low height above their respective lower ends 9. This lower connecting plate 4 extends horizontally at a low height above the horizontal plane 10.
  • the two connecting plates 3 and 4 are made of non-magnetic stainless steel.
  • Two trapezoidal closing flanges 14 and 15 also made of non-magnetic metallic material, are welded in vertical position on either side of the fixed part, against the two pole pieces 1 and 2 and against the two connection plates 3 and 4 - see also figures 3 and 4.
  • the internal faces of the two pole pieces 1 and 2 have concave cylindrical zones, respectively 16 and 17, located in correspondence with the periphery of the cylindrical rotor 5 and providing an air gap 18.
  • the two closing flanges 14 and 15 have respective rings 19 and 20, serving as bearings for centering and guiding in rotation, around the horizontal axis 6, of two pins 21 and 22 provided at the two ends of the rotor 5.
  • the rotor 5 itself comprises a first piece of mild steel 23 and a second piece of mild steel 24, between which permanent magnets are inserted 25.
  • This rotor 5 has an asymmetrical structure: the first piece of mild steel 23 has a section in the form of a relatively small circle segment, and the second piece of mild steel 24 has a section in the form of a relatively large circle segment, which can be a little larger than a semicircle as shown in FIGS. 1 to 3.
  • the permanent magnets 25, inserted between the two opposite mild steel parts 23 and 24, are magnets of the "rare earth” type, such as neodymium-iron-boron magnets.
  • the direction of magnetization of all these magnets 25 is orthogonal to the axis of rotation 6 of the rotor 5, so that the lines of force 26 of the magnetic field created by these magnets 25 pass through the two pieces of mild steel 23 and 24.
  • the rotor 5 In the "off" position, as shown in FIG. 1, the rotor 5 is angularly positioned so that its first piece of mild steel 23 is located at the top, while its second piece of mild steel 24 is located at the bottom, the magnets 25 lying in a horizontal plane.
  • the lines of force 26 of the magnetic field created by these magnets 25 then close in "short circuit” through the two pole pieces 1 and 2.
  • the attraction exerted by the lower ends 9 of these pole pieces 1 and 2 is zero. .
  • the rotor 5 occupies a different angular position, in which its magnets 25 are located in an inclined plane, forming an acute angle ⁇ relative to the vertical median plane 7.
  • the first part made of mild steel 23 of the rotor 5 is thus located opposite the concave zone 16 of the pole piece 1
  • the second piece of mild steel 24 of the rotor 5 is located opposite the concave area 17 of the other pole piece 2
  • the two pole pieces 1 and 2 thus form, by their respective lower ends 9, two active poles, one "North” and the other "South”; any piece 27 of ferromagnetic material can be attracted by these active poles, the lines of force 26 then closing by the pole piece 1, the attracted piece 27 and the other pole piece 2.
  • the magnetic carrier is provided with a manual switching device designated as a whole by the reference 28, and shown in FIGS. 3 and 4.
  • a hub 29 linked in rotation with the pin 21 by a pin 30.
  • the hub 29 supports a radial tube 31, around which is fixed an operating handle 32.
  • a rod 33 Inside the tube 31 is slidably mounted a rod 33, pushed outwards by a spring 34, the outer end 35 of the rod 33 projecting slightly out of the tube 31 to form a push button.
  • the rod 33 Towards its inner end, the rod 33 carries a pin 36, which passes through longitudinal slots 37 of the wall of the tube 31 and which is engaged in a recessed area 38 of the external face of the closing flange 14.
  • the recessed area 38 has an outline 39 of generally circular shape, but having a notch 40 formed in a predetermined angular position, corresponding to the "on" position of the rotor 5.
  • the engagement of the pin 36 in the notch 40 indexes the rotor 5 in the "on” position. To leave this position, it is necessary to press on the outer end 35 of the rod 33, to make it slide against the force of the spring 34, so as to extract the pin 36 from the notch 40.
  • a indexing in the "off" position is not provided, because it is unnecessary.
  • the invention is not limited to the only embodiment of this magnetic carrier with permanent magnets which has been described above, by way of example; on the contrary, it embraces all of the variant embodiments and applications respecting the same principle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
EP94420115A 1993-06-24 1994-04-11 Porteur magnétique à aimants permanents Expired - Lifetime EP0631971B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9307940A FR2706881B1 (es) 1993-06-24 1993-06-24
FR9307940 1993-06-24

Publications (2)

Publication Number Publication Date
EP0631971A1 EP0631971A1 (fr) 1995-01-04
EP0631971B1 true EP0631971B1 (fr) 1997-07-16

Family

ID=9448701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94420115A Expired - Lifetime EP0631971B1 (fr) 1993-06-24 1994-04-11 Porteur magnétique à aimants permanents

Country Status (6)

Country Link
US (1) US5382935A (es)
EP (1) EP0631971B1 (es)
JP (1) JP2769432B2 (es)
DE (1) DE69404232T2 (es)
ES (1) ES2107159T3 (es)
FR (1) FR2706881B1 (es)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6638002B1 (en) 2000-08-17 2003-10-28 Claire T. Martin Pallet pin sheet fanner
US6331810B1 (en) * 2000-09-01 2001-12-18 Hyung Jung Magnetic lifting apparatus
DE20015391U1 (de) * 2000-09-06 2002-01-17 Mv Marketing & Vertriebs Gmbh & Co Kg Halterungsvorrichtung insbesondere zum Fixieren und/oder Lösen von Anbauteilen
KR20030086562A (ko) * 2003-10-24 2003-11-10 예해금 자력흡착기의 흡착자력 스위치장치
US7495879B2 (en) * 2005-02-04 2009-02-24 Thexton Andrew S Solid-state magnet control
WO2007033437A1 (en) * 2005-09-26 2007-03-29 Magswitch Technology Worldwide Pty Ltd Magnet arrays
AU2006294433B2 (en) * 2005-09-26 2011-06-09 Magswitch Technology Worldwide Pty Ltd Magnet arrays
US20070296545A1 (en) * 2005-12-14 2007-12-27 Checkpoint Systems, Inc. System for management of ubiquitously deployed intelligent locks
CN101426664B (zh) 2006-03-13 2013-02-13 磁转换技术全球控股有限公司 磁性回路、具有该回路的车辆及支承器具
US7848861B2 (en) * 2007-08-23 2010-12-07 Edw. C. Levy Co. Method and apparatus for providing diagnostics of a lifting magnet system
DE102008048592B4 (de) * 2008-09-23 2010-08-26 Mr-Chemie Gmbh Verstellbarer Handmagnet
KR20120109529A (ko) * 2010-02-12 2012-10-08 수워푸 매그네틱스(상하이) 컴퍼니 리미티드 영구자기 리프팅 디바이스
DE102010029681B4 (de) * 2010-06-02 2013-12-24 Horst Flaig Magnetische Haltevorrichtung
WO2012142306A2 (en) * 2011-04-12 2012-10-18 Sarai Mohammad Magnetic configurations
US10378652B2 (en) 2014-08-20 2019-08-13 Vacuworx Global, LLC Seal for a vacuum material lifter
US9975254B2 (en) * 2015-12-15 2018-05-22 Adam Zane Bell Rigid magnetic tag line safety tool
CA3018915A1 (en) 2016-02-29 2017-08-29 Plombco Inc. Spool securing mechanism
CA2922039A1 (en) 2016-02-29 2017-08-29 Plombco Inc. Balancing weight application machine and method of use thereof
USD816936S1 (en) * 2016-10-20 2018-05-01 Lifesaving Systems Corp. Magnetic lifting ring
USD816935S1 (en) * 2016-10-20 2018-05-01 Lifesaving Systems Corp. Magnetic lifting ring
US11521774B2 (en) 2020-08-28 2022-12-06 Hubbell Incorporated Magnet control units

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE90746C (es) *
GB444786A (en) * 1934-07-23 1936-03-27 Max Baermann Junior Magnetic holder and support
CH212041A (de) * 1939-07-28 1940-10-31 Bohli Hans Mindestens einen permanenten, quermagnetisierten, zylindrischen Magneten aufweisende Vorrichtung.
US3089064A (en) * 1958-02-08 1963-05-07 Electro Chimie Metal Combined permanent magnet and electromagnet
US3596967A (en) * 1969-01-31 1971-08-03 United States Steel Corp Lifting device
DE2115847A1 (de) * 1971-04-01 1972-10-12 Fritz L Lastmagneteinnchtung zur Hand habung von ferromagnetischen Gegenstanden insbesondere von Brammen und Bunden aus gewalztem Blech
NL7604572A (nl) * 1976-04-29 1977-11-01 Walker Hagou Bv Permanent-magnetische hefmagneet.
US4314219A (en) * 1979-04-17 1982-02-02 Hitachi Metals, Ltd. Permanent magnet type lifting device
FR2523940A1 (fr) * 1982-03-25 1983-09-30 Braillon Cie Appareil magnetique, notamment pour la manutention
FR2675299B1 (fr) * 1991-04-10 1994-09-16 Braillon Cie Porteur magnetique a aimants permanents.

Also Published As

Publication number Publication date
DE69404232T2 (de) 1997-11-06
JPH0710453A (ja) 1995-01-13
EP0631971A1 (fr) 1995-01-04
JP2769432B2 (ja) 1998-06-25
FR2706881A1 (es) 1994-12-30
ES2107159T3 (es) 1997-11-16
DE69404232D1 (de) 1997-08-21
FR2706881B1 (es) 1995-07-28
US5382935A (en) 1995-01-17

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