EP0318177A1 - Produit moulé - Google Patents

Produit moulé Download PDF

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Publication number
EP0318177A1
EP0318177A1 EP88310529A EP88310529A EP0318177A1 EP 0318177 A1 EP0318177 A1 EP 0318177A1 EP 88310529 A EP88310529 A EP 88310529A EP 88310529 A EP88310529 A EP 88310529A EP 0318177 A1 EP0318177 A1 EP 0318177A1
Authority
EP
European Patent Office
Prior art keywords
former
core member
assembly according
laminations
limbs
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.)
Withdrawn
Application number
EP88310529A
Other languages
German (de)
English (en)
Inventor
Frank Mclean Logie
Ronald Phillips
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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 Lucas Industries Ltd filed Critical Lucas Industries Ltd
Publication of EP0318177A1 publication Critical patent/EP0318177A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/005—Impregnating or encapsulating

Definitions

  • This invention relates to a solenoid assembly of the kind comprising a plurality of laminations located in side by side relationship to form a core member having at least two limbs, a former mounted about one limb of the core member, a winding carried by the former and a moulded body encapsulating the core member and former.
  • the object of the invention is to provide a solenoid assembly of the kind specified in a simple and convenient form and a method of making the assembly.
  • the part of the laminations forming said other limb or limbs are held together by a clip or clips, each clip defining a pair of arms engaged with the outer laminations respectively of the core member to secure the laminations.
  • the solenoid assembly comprises a core member generally indicated at 10, a former generally indicated at 11, the former carrying a winding 12 and a moulded body 13 which encapsulates the core member, the former and the winding.
  • the core member is formed from a plurality of laminations assembled together to form a stack, the particular core member being of "E" configuration.
  • the centre limb 14 and the side limbs 15 define pole faces which are exposed on a flat face 16 of the moulding.
  • the moulding defines through apertures 17 whereby the assembly can be secured to a housing not shown which contains a movable armature.
  • FIG. 4 The perspective view of Figure 4 illustrates the solenoid assembly prior to it being inserted into a mould to form the body 13 and the construction of this subassembly will now be described.
  • the former 11 Surrounding the centre limb 14 of the core is the former 11 and as will be seen from Figures 5-7, it is of generally rectangular form and defining a central opening 18 to receive the limb 14 of the core.
  • the narrower sides of the former are extended upwardly to form extensions 19 having inwardly inclining sides 20.
  • the upper side of the extension defines a tongue 21 the free end portion of which is tapered.
  • the edges of the tongue define steps 22 respectively and the tongue is slotted at 23 along its length for a purpose to be described.
  • the extensions 19 are provided with fillets 24 which provide support for the extensions.
  • the cheeks 25 of the former adjacent the extensions 19, are slotted at 26 to receive the ends of the winding as shown in Figure 4.
  • each clip is of generally "C" shaped form with the arms 29 of the clips having curved end portions for engagement with the outermost laminations.
  • each bridging member 28 Extending outwardly from each bridging member 28 are a pair of tongues 30 which at their free ends mount tubular members 31 which extend in parallel relationship but spaced from the limbs of the core and their length is substantially equal to the lengths of the apertures 17 in the completed moulding.
  • the clips together with the tongues and tubular members are formed from a single sheet of material, the tubular members being rolled and in addition, provided with rows of apertures 32 along their length. It is arranged that when the clips are engaged with the respective limbs, the tubular members are positioned in curved cut-away portions 33 ( Figure 7) formed at the corners of the end cheeks of the coil former.
  • moulded terminal mounting 34 formed from insulating material and which is seen in plan view in Figure 8 and in the perspective view of Figure 4.
  • the mounting is located against the face of the stack of laminations remote from the limbs and as seen in Figure 4, it has depending portions 35 which engage over the ends of the adjacent laminations.
  • the terminal mounting defines a pair of spaced bosses 36 which define apertures 37 and also offset locations 36A.
  • the mounting also defines a pair of lateral extensions 38 the ends of which as will be seen from Figure 4, extend beyond the adjacent sides of the core.
  • the extensions are provided with a pair of rectangular openings 39 and intermediate the openings and also between the bosses, the mounting is provided with upstanding ribs 40 which stiffen the mounting.
  • the openings 39 are engaged by the tongues 21 on the extensions 19 of the coil former and when the tongues are moved through the openings, the slots 23 permit the edges of the tongues to deform and when fully engaged in position, the steps 22 engage with the surfaces of the extensions 28 of the terminal mounting to retain the two components in assembly.
  • the openings 37 receive terminal members 41 which are machined from hexagonal bar and define spigots for location in the openings 37.
  • the locations 36A act to retain the terminal member against angular movement.
  • the opposite ends of the terminal members are threaded and during assembly, the end turns of the coil are welded or otherwise secured to the terminal members respectively.
  • the extensions 38 of the terminal mounting are provided with locating openings 42 which provide location of the portion of the wire extending between the terminal members and the winding 12.
  • the method of assembly is to first wind the winding upon the coil former and then to locate the former about the centre limb of the stack of laminations.
  • the clips 27 are then fitted to the outer limbs 25 of the core and the terminal mounting 34 is secured in position following which the terminal members are located in position and the connecting wires secured thereto.
  • the tubular members 31 locate in the cutaway portions 33 in the end cheeks of the former.
  • the resulting assembly is located in a mould cavity and appropriate mould material is injection moulded.
  • the material has the effect of securing all the parts of the assembly together and following removal from the mould cavity the end face of the body is machined so that the pole faces of the limbs lie flush with the face of the body. Since during the moulding operation the mould material is injected into the mould cavity under considerable pressure, it is essential to ensure that no movement of the subassembly or parts thereof takes place during the moulding operation.
  • the terminal members locate in apertures formed in one of the mould parts and the other mould part is provided with tapered pins which enter into the tubular members 31.
  • the tapered pins positively locate the tubular members and during final closure of the mould parts the members 31 are subjected to axial pinching and in addition, axial pressure is also applied to the terminal members.
  • the complete subassembly apart from the end portions of the terminal members is encapsulated in the moulding material and this moulding material also flows into the apertures 32 in the tubular members to provide a lining to the bores defined by the tubular members.
  • the terminal mounting 34 does not extend the full width of the stack of laminations.
  • the mounting can be so extended together with the depending portions 35 to provide endwise location of all the laminations of the stack.
  • the tubular members 31 may be formed as separate items and if desired formed from continuous tube as opposed to being wrapped. In addition, the tubes may or may not be provided with the apertures 32.
  • the tubular members may be waisted intermediate their ends and the tongues 30 may be wrapped around the waisted portions of the members respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnets (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
EP88310529A 1987-11-24 1988-11-09 Produit moulé Withdrawn EP0318177A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8727457 1987-11-24
GB878727457A GB8727457D0 (en) 1987-11-24 1987-11-24 Moulded product

Publications (1)

Publication Number Publication Date
EP0318177A1 true EP0318177A1 (fr) 1989-05-31

Family

ID=10627438

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88310529A Withdrawn EP0318177A1 (fr) 1987-11-24 1988-11-09 Produit moulé

Country Status (3)

Country Link
EP (1) EP0318177A1 (fr)
JP (1) JPH02139214A (fr)
GB (1) GB8727457D0 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5926082A (en) * 1997-12-17 1999-07-20 Caterpillar Inc. Solenoid stator assembly
WO2000007203A1 (fr) * 1998-07-27 2000-02-10 Siemens Aktiengesellschaft Appareil de commutation comportant une partie inferieure de boitier comme element constitutif, et procede de production correspondant
GB2413899B (en) * 2003-02-07 2007-02-14 Bosch Gmbh Robert Solenoid stator assembly having a reinforcement structure

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB771934A (en) * 1953-10-16 1957-04-10 British Thomson Houston Co Ltd Improvements in and relating to insulated electrical apparatus
US3110873A (en) * 1960-07-26 1963-11-12 Gen Electric Unitary clamping and support arrangement for coil and core assembly
US3169235A (en) * 1961-12-21 1965-02-09 Jefferson Electric Co Heat dissipating ballast construction embodying core clamp having coplanar spacer lugs
US3524156A (en) * 1968-08-26 1970-08-11 Stephen Horbach Printed circuit transformer bobbin
DE1613777A1 (de) * 1968-01-31 1971-04-22 Blum Eisen & Metallind Spulenkoerper mit einer oder mehreren Drahtwicklungen und eingeschobenem Eisenkern
US3665358A (en) * 1971-02-09 1972-05-23 Collins Radio Co Reactor coil form
FR2221899A1 (fr) * 1973-03-17 1974-10-11 Frater Sae
DE7405664U (de) * 1974-11-07 Blaupunkt Werke Gmbh Spulenkörper
US4156888A (en) * 1977-04-11 1979-05-29 Denki Onkyo Co., Ltd. Flyback transformer

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7405664U (de) * 1974-11-07 Blaupunkt Werke Gmbh Spulenkörper
GB771934A (en) * 1953-10-16 1957-04-10 British Thomson Houston Co Ltd Improvements in and relating to insulated electrical apparatus
US3110873A (en) * 1960-07-26 1963-11-12 Gen Electric Unitary clamping and support arrangement for coil and core assembly
US3169235A (en) * 1961-12-21 1965-02-09 Jefferson Electric Co Heat dissipating ballast construction embodying core clamp having coplanar spacer lugs
DE1613777A1 (de) * 1968-01-31 1971-04-22 Blum Eisen & Metallind Spulenkoerper mit einer oder mehreren Drahtwicklungen und eingeschobenem Eisenkern
US3524156A (en) * 1968-08-26 1970-08-11 Stephen Horbach Printed circuit transformer bobbin
US3665358A (en) * 1971-02-09 1972-05-23 Collins Radio Co Reactor coil form
FR2221899A1 (fr) * 1973-03-17 1974-10-11 Frater Sae
US4156888A (en) * 1977-04-11 1979-05-29 Denki Onkyo Co., Ltd. Flyback transformer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TECHNICAL DIGEST (WESTERN ELECTRIC), no. 76, March 1985, page 17, AT&T Technologies, New York, US; H. CURTIS III et al.: "Ferrite choke coil assembly" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5926082A (en) * 1997-12-17 1999-07-20 Caterpillar Inc. Solenoid stator assembly
WO2000007203A1 (fr) * 1998-07-27 2000-02-10 Siemens Aktiengesellschaft Appareil de commutation comportant une partie inferieure de boitier comme element constitutif, et procede de production correspondant
GB2413899B (en) * 2003-02-07 2007-02-14 Bosch Gmbh Robert Solenoid stator assembly having a reinforcement structure

Also Published As

Publication number Publication date
GB8727457D0 (en) 1987-12-23
JPH02139214A (ja) 1990-05-29

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Effective date: 19891201