EP0921536A1 - Elektromagnetischer Betätiger mit schwalbenschwanzförmiger Blechpaket-Gehäuse Verbindung - Google Patents

Elektromagnetischer Betätiger mit schwalbenschwanzförmiger Blechpaket-Gehäuse Verbindung Download PDF

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Publication number
EP0921536A1
EP0921536A1 EP98123223A EP98123223A EP0921536A1 EP 0921536 A1 EP0921536 A1 EP 0921536A1 EP 98123223 A EP98123223 A EP 98123223A EP 98123223 A EP98123223 A EP 98123223A EP 0921536 A1 EP0921536 A1 EP 0921536A1
Authority
EP
European Patent Office
Prior art keywords
lamination stack
housing
shaped feature
shaped
lamination
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.)
Granted
Application number
EP98123223A
Other languages
English (en)
French (fr)
Other versions
EP0921536B1 (de
Inventor
Dennis Bulgatz
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.)
Continental Automotive Systems Inc
Original Assignee
Siemens Automotive Corp
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 Siemens Automotive Corp filed Critical Siemens Automotive Corp
Publication of EP0921536A1 publication Critical patent/EP0921536A1/de
Application granted granted Critical
Publication of EP0921536B1 publication Critical patent/EP0921536B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1638—Armatures not entering the winding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/02—Cores, Yokes, or armatures made from sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions

Definitions

  • This invention relates to an electromagnetic actuator for a vehicle engine and, more particularly, to a method of securing a lamination stack of the actuator to a housing of the actuator.
  • a conventional electromagnetic actuator for opening and closing a valve of an internal combustion engine generally includes "open” and “close” electromagnets which, when energized, produce an electromagnetic force on an armature.
  • the armature is biased by a pair of identical springs arranged in parallel.
  • the armature is coupled with a cylinder valve of the engine.
  • the armature rests approximately half-way between the open and close electromagnets when the springs are in equilibrium.
  • potential energy is stored by the springs.
  • the spring's potential energy will be converted to kinetic energy of the moving mass and cause the armature to move towards the close electromagnet. If friction is sufficiently low, the armature can then be caught in the closed position by applying current to the close electromagnet.
  • the conventional electromagnetic actuator includes a pair of electromagnets each including a lamination stack coupled to a housing.
  • a coil is associated with each lamination stack.
  • the lamination stack is secured to the housing by a pin connection which is generally difficult to install due to the forces required to create an interference fit with the housing.
  • An object of the present invention is to fulfil the need referred to above.
  • this objective is obtained by a method of joining a lamination stack of an electromagnetic actuator to a housing of the actuator which includes providing a lamination stack having at least one shaped feature.
  • a mold is provided to define the housing.
  • the lamination stack is inserted into the mold such that the shaped feature of the lamination stack will define a mating shaped feature in the housing.
  • Material is cast around at least a portion of lamination stack to define the housing such that the shaped feature of the lamination stack is engaged with the shaped feature of the housing, thereby joining the lamination stack to the housing.
  • the assembly of the lamination stack and housing is then removed from the mold.
  • a lamination stack and housing assembly for an electromagnetic actuator which includes a lamination stack and a housing.
  • the lamination stack has a plurality of individual laminations.
  • the lamination stack also includes a bottom surface and a shaped feature associated with the bottom surface.
  • the housing has an upper surface and a shaped feature associated with the upper surface. The housing receives the lamination stack such that the shaped feature of the lamination stack is engaged with the shaped feature of the housing and the bottom surface of the lamination stack contacts the upper surface of the housing.
  • an electromagnetic actuator is shown, generally indicated 10, having a lower housing assembly and lamination stack connection provided in accordance with the principles of the present invention.
  • the electromagnetic actuator 10 includes an upper housing 13 containing an upper electromagnet 15 and a lower housing 17 containing a lower electromagnet 19.
  • An armature 21 is arranged for movement between the electromagnets 15 and 19.
  • the armature 21 is carried by a shaft 23.
  • the shaft 23 is configured to be coupled to a stem of a cylinder valve (not shown) of an engine of a vehicle in the conventional manner.
  • the lower electromagnet 15 includes a lamination stack, generally indicated at 14, which is contained in the lower housing 17.
  • the lamination stack 14 comprises a plurality of individual stacked laminations 16 preferably composed of a soft magnetic material such as silicon iron.
  • Each lamination 16 is generally E-shaped defining channels 18 to receive a coil assembly 24 (FIG. 1) of the electromagnet 19.
  • the individual laminations 16 are preferably joined by a weld 29, or other suitable method such as by pins or an interlocking arrangement to define the lamination stack 14.
  • each lamination 16 includes at least one shaped feature associated with a bottom surface 28 thereof which cooperate to define at least one shaped feature 26 of the lamination stack 14.
  • the shaped feature 26 includes two dovetails projecting in spaced relation from the bottom surface 28, used to secure the lamination stack 14 to the lower housing 17, as will become apparent below.
  • FIG. 3 shows the configuration of a cast lower housing 17 without the lamination stack 14 coupled thereto.
  • the lower housing 17 includes at least one shaped feature 30 associated with the upper surface 32 thereof and constructed and arranged to mate with the shaped feature 26 of the lamination stack 14.
  • the shaped feature 30 of the lower housing 17 includes two spaced channels 30 defined in the upper surface 32 thereof to receive the dovetails 26 of the lamination stack 14.
  • the lamination stack 14 should be in intimate contact with the lower housing 17. This is best achieved by first placing the lamination stack inside a mold 34.
  • the mold is configured to define the lower housing 17.
  • the dovetails 26 of the lamination stack 14 define the shaped features 30 or channels in the lower housing 17 during the casting operation.
  • the lower housing 17 is composed of aluminum.
  • other castable materials exhibiting good heat transfer properties can be employed as the material for the lower housing 17.
  • aluminum is cast around the lamination stack 14 such that upon hardening of the aluminum, the dovetails 26 of the lamination stack 14 are engaged with the channels 30 of the lower housing 17 thereby joining the lamination stack 14 to the lower housing 17.
  • FIG 4 shows a cross-section of the lamination stack 14 joined to the lower housing 17 after the casting operation, with the upper surface of the lower housing 17 contacting the bottom surface 28 of the lamination stack 14. After the aluminum has hardened, the assembly of the lower housing 17 and lamination stack 14 is removed from the mold.
  • the lamination stack 14 can include the channel(s) and the lower housing 17 can include the mating dovetail(s).
  • the mating shaped features 26 of the lamination stack 14 were shown to be dovetails and the mating shaped features 30 of the lower housing 17 were shown to be channels, it can be appreciated that the mating shaped features 26 and 30 may be of other configurations to join the lamination stack 14 to the lower housing 17.
  • one of the components can include a groove and the other part can include a protrusion to be received in the groove.
  • Casting of the lamination stack 14 inside the housing 17 advantageously reduces machining operations necessary to prepare the housing for the lamination stack if the two components were to be assembled separately. Engagement of the lamination stack among its length by the housing provides added rigidity to the lamination stack, reducing deflection during operation of the actuator.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Electromagnets (AREA)
  • Magnetically Actuated Valves (AREA)
EP98123223A 1997-12-09 1998-12-07 Elektromagnetischer Betätiger mit schwalbenschwanzförmiger Blechpaket-Gehäuse Verbindung Expired - Lifetime EP0921536B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US6914497P 1997-12-09 1997-12-09
US69144P 1997-12-09
US204376P 1998-12-02
US09/204,376 US20010040018A1 (en) 1997-12-09 1998-12-02 Electromagnetic actuator with lamination stack-housing dovetail connection

Publications (2)

Publication Number Publication Date
EP0921536A1 true EP0921536A1 (de) 1999-06-09
EP0921536B1 EP0921536B1 (de) 2005-11-23

Family

ID=26749734

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98123223A Expired - Lifetime EP0921536B1 (de) 1997-12-09 1998-12-07 Elektromagnetischer Betätiger mit schwalbenschwanzförmiger Blechpaket-Gehäuse Verbindung

Country Status (4)

Country Link
US (1) US20010040018A1 (de)
EP (1) EP0921536B1 (de)
JP (1) JPH11260639A (de)
DE (1) DE69832458T2 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000043643A1 (en) * 1999-01-21 2000-07-27 Siemens Automotive Corporation Electromagnetic actuator upper spring assembly
WO2001041163A1 (de) * 1999-12-02 2001-06-07 Fev Motorentechnik Gmbh Elektromagnetischer aktuator mit geteiltem gehäuse
FR2808116A1 (fr) * 2000-04-19 2001-10-26 Daimler Chrysler Ag Dispositif comprenant au moins un electroaimant
FR2829282A1 (fr) * 2001-08-31 2003-03-07 Mitsubishi Electric Corp Procede de formation d'un noyau stratifie et dispositif d'entrainement de soupape du type electromagnetique
US7156366B2 (en) 2002-10-25 2007-01-02 Toyota Jidosha Kabushiki Kaisha Electromagnetically driven valve device
CN102945723A (zh) * 2012-10-19 2013-02-27 中国煤炭科工集团太原研究院 一种阀用本安电磁铁
CN103358502A (zh) * 2012-03-29 2013-10-23 住友重机械工业株式会社 注射成型机

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090006826A (ko) * 2006-05-09 2009-01-15 스팽 ＆ 컴퍼니 전자기 어셈블리, 이를 형성하기 위한 코어 세그먼트, 및 그 제조 방법
US20070262839A1 (en) * 2006-05-09 2007-11-15 Spang & Company Electromagnetic assemblies, core segments that form the same, and their methods of manufacture
US20070261231A1 (en) * 2006-05-09 2007-11-15 Spang & Company Methods of manufacturing and assembling electromagnetic assemblies and core segments that form the same
JP6575343B2 (ja) 2015-12-11 2019-09-18 オムロン株式会社 リレー
JP6421745B2 (ja) * 2015-12-11 2018-11-14 オムロン株式会社 リレー
EP3246926A1 (de) * 2016-05-20 2017-11-22 Melexis Technologies SA Magnetflusskonzentratorstruktur und verfahren zur herstellung davon
US10726985B2 (en) * 2018-03-22 2020-07-28 Schaeffler Technologies AG & Co. KG Multi-stage actuator assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110874A (en) * 1961-01-24 1963-11-12 Gen Electric Magnetic core structure
US4540966A (en) * 1982-11-24 1985-09-10 Albany-Chicago Corporation Multiple magnet core unit
GB2252675A (en) * 1991-02-08 1992-08-12 Diesel Tech Corp Solenoid stator assembly for fuel injectors
US5153475A (en) * 1991-01-08 1992-10-06 Contraves Usa, Inc. Magnetic axial force actuator construction
US5339063A (en) * 1993-10-12 1994-08-16 Skf U.S.A., Inc. Solenoid stator assembly for electronically actuated fuel injector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110874A (en) * 1961-01-24 1963-11-12 Gen Electric Magnetic core structure
US4540966A (en) * 1982-11-24 1985-09-10 Albany-Chicago Corporation Multiple magnet core unit
US5153475A (en) * 1991-01-08 1992-10-06 Contraves Usa, Inc. Magnetic axial force actuator construction
GB2252675A (en) * 1991-02-08 1992-08-12 Diesel Tech Corp Solenoid stator assembly for fuel injectors
US5339063A (en) * 1993-10-12 1994-08-16 Skf U.S.A., Inc. Solenoid stator assembly for electronically actuated fuel injector

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000043643A1 (en) * 1999-01-21 2000-07-27 Siemens Automotive Corporation Electromagnetic actuator upper spring assembly
WO2001041163A1 (de) * 1999-12-02 2001-06-07 Fev Motorentechnik Gmbh Elektromagnetischer aktuator mit geteiltem gehäuse
FR2808116A1 (fr) * 2000-04-19 2001-10-26 Daimler Chrysler Ag Dispositif comprenant au moins un electroaimant
FR2829282A1 (fr) * 2001-08-31 2003-03-07 Mitsubishi Electric Corp Procede de formation d'un noyau stratifie et dispositif d'entrainement de soupape du type electromagnetique
US6732998B2 (en) 2001-08-31 2004-05-11 Mitsubishi Denki Kabushiki Kaisha Method of forming laminated core and electromagnetic type valve driving device
DE10213487B4 (de) * 2001-08-31 2007-09-06 Mitsubishi Denki K.K. Verfahren zur Bildung eines laminierten Kerns und einer Ventilantriebsvorrichtung von elektromagnetischer Art
US7156366B2 (en) 2002-10-25 2007-01-02 Toyota Jidosha Kabushiki Kaisha Electromagnetically driven valve device
CN103358502A (zh) * 2012-03-29 2013-10-23 住友重机械工业株式会社 注射成型机
CN103358502B (zh) * 2012-03-29 2016-04-06 住友重机械工业株式会社 注射成型机
CN102945723A (zh) * 2012-10-19 2013-02-27 中国煤炭科工集团太原研究院 一种阀用本安电磁铁

Also Published As

Publication number Publication date
DE69832458T2 (de) 2006-06-22
US20010040018A1 (en) 2001-11-15
JPH11260639A (ja) 1999-09-24
EP0921536B1 (de) 2005-11-23
DE69832458D1 (de) 2005-12-29

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