EP1029334B1 - Contacteur de demarreur comportant un noyau magnetique fixe en plusieurs parties - Google Patents

Contacteur de demarreur comportant un noyau magnetique fixe en plusieurs parties

Info

Publication number
EP1029334B1
EP1029334B1 EP99941683A EP99941683A EP1029334B1 EP 1029334 B1 EP1029334 B1 EP 1029334B1 EP 99941683 A EP99941683 A EP 99941683A EP 99941683 A EP99941683 A EP 99941683A EP 1029334 B1 EP1029334 B1 EP 1029334B1
Authority
EP
European Patent Office
Prior art keywords
contactor
metal sheets
stack
magnetic core
coil
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
EP99941683A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1029334A1 (fr
Inventor
Jean-François Quentric
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.)
Valeo Equipements Electriques Moteur SAS
Original Assignee
Valeo Equipements Electriques Moteur SAS
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 Valeo Equipements Electriques Moteur SAS filed Critical Valeo Equipements Electriques Moteur SAS
Publication of EP1029334A1 publication Critical patent/EP1029334A1/fr
Application granted granted Critical
Publication of EP1029334B1 publication Critical patent/EP1029334B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
    • H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
    • H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
    • H01H51/065—Relays having a pair of normally open contacts rigidly fixed to a magnetic core movable along the axis of a solenoid, e.g. relays for starting automobiles

Definitions

  • the invention relates to an electromagnetic actuator of a starter of a motor vehicle starter, also called a starter contactor.
  • the invention more particularly relates to a contactor for a motor vehicle starter, of the type comprising a movable magnetic core which moves axially under the effect of a magnetic field created by a coil comprising at least one electrical conductor wound around a body of a coil, and of the type having a fixed magnetic core which extends transversely to an axial end before the winding, of the type in which the fixed core comprises a rear drum which is axially received in the coil and which comprises a bore axial valve for allowing the passage of a movable contact rod, and of the type in which the fixed core comprises a front annular disk, which is assembled to the rear barrel, and which is mounted in a cylindrical housing of the contactor.
  • the magnetic field created by the electrical conductor wound around the body of the coil of a contactor follows field lines which are substantially axial inside the coil and which have the form of loops closing on them -Outside the coil.
  • the fixed magnetic core is generally a piece of soft iron that ensures continuity of passage of the magnetic flux between the starter casing and the movable core.
  • the field lines are closed on themselves in the immediate vicinity of the coil, which increases the efficiency of the electromagnet and reduce the electrical power consumed by it.
  • the fixed magnetic cores used in the manufacture of starters conventional ones are in one piece, and made by a conventional extrusion process.
  • the thickness of the front disc which is a constructive provision essential to provide satisfactory guidance of the mobile contact rod connected to the movable core, is such that its cutting press requires low production rates and requires a press of high power, which makes the manufacture of the disc before an expensive operation.
  • Document FR-A-2 548 280 discloses a contactor for a starter of the type comprising a movable magnetic core which moves axially under the effect of a magnetic field created by a coil, and comprising a fixed magnetic core comprising an annular disc. consisting of a stack of sheets the invention proposes a fixed magnetic core of simplified manufacture.
  • the invention proposes a contactor for a motor vehicle starter according to claim 1.
  • FIG. 1 There is shown in Figure 1 a starter switch 10 (not shown) for equipping a combustion engine of a motor vehicle.
  • the starter contactor 10 comprises a substantially cylindrical carcass 12 and which comprises from front to back, that is to say from the right to the left, a bore 14 of large diameter and a bore 16 of small diameter.
  • the bore 14 of large diameter has at its front end a chamfered inner cylindrical bearing 15 whose function will be described later.
  • a shoulder surface 18 defines the two bores 14 and 16.
  • the large-diameter bore 14 receives a coil 20 which is immobilized axially, along the longitudinal axis XX of the contactor by the shoulder surface 18.
  • the coil 20 is substantially cylindrical and has an internal bore 22 of a substantially equal diameter to that of the small diameter inner bore 16 of the carcass 12, so that when the coil 20 is mounted in the carcass 12, the inner bore 22 of the coil 20 is aligned along the axis XX with the small diameter bore 16 of the carcass 12.
  • the small diameter inner bore 16 and the inner bore 22 of the coil axially slidably receive a movable magnetic core 24.
  • the assembly of the coil 20 and the magnetic core 24 form an electromagnet which is capable of controlling the operation of the magnet. starter of the vehicle.
  • a fixed magnetic core 26 is arranged at the forward axial end of the coil 20.
  • the fixed magnetic core 26 has a substantially cylindrical rear shank 28, which is axially received in the inner bore 22 of the reel 20, and a front annular disk 30, which is received in a cylindrical housing 11 in front of the inner bore 14 of large diameter and formed in the carcass 12.
  • the disc 30 is pressed against the front end 32 of the
  • the cover 34 is crimped into the chamfered inner cylindrical bearing surface 15 of the carcass 12 and axially closes the large diameter inner bore 14 of the carcass 12.
  • the rear shank 28 comprises, from the rear towards the front, a rear male frustoconical surface 36 which is intended to be received in a complementary female frustoconical surface 38 of the movable magnetic core, and a cylindrical body before 41, the scope female frustoconical 38 and the cylindrical body 41 defining a shoulder surface 40.
  • the shoulder surface 40 is intended to serve as a stop on an annular cylindrical face 42 of the front end of the movable magnetic core 24 during its axial movements.
  • the fixed magnetic core 26 is pierced at its center with a hole 44 intended to allow the passage and the guiding of a movable contact rod 46 which can be controlled in its axial displacements by the axial movements of the mobile magnetic core 24 to establish, through the contact plate 47 that it carries, an electrical contact between two terminals 48 carried by the cap 34 for closing the carcass 12.
  • the fixed magnetic core 26 is in contact with a metal body 50 of the coil 20.
  • the fixed magnetic core 26 is itself made of a magnetic material and advantageously closes the magnetic circuit of which the coil 20 is part, so that, when a current flows through the winding of the coil 20, the field lines inside the coil 20 are substantially axial and parallel to the axis XX.
  • the fixed magnetic core is a piece of metallic material Magnetically made in one piece as shown in Figure 1.
  • the fixed magnetic core is made by extrusion, which, given the complex shapes that it comprises, such as the frustoconical bearing surface 36, the shoulder surface 40, or the hole 44 for passage of the movable contact rod 46, makes it a relatively expensive part to manufacture.
  • FIG 2 shows another state of the art in which the fixed magnetic core 26 is made in two parts, the rear drum 28 and the front disc 30 being made separately.
  • the assembly of the rear drum 28 and the disk 30 has similar shapes to the fixed magnetic core 26 described above with reference to FIG. 1.
  • the rear drum 28 comprises, from behind forwards, the frustoconical bearing surface 36, the cylindrical body 41 , and a front axial cylindrical ring 54 whose inner diameter corresponds to the diameter of the hole 44 previously described, and whose outer diameter, which is much smaller than that of the cylindrical body 41, is intended to allow the centering of the disk 30 before being received in a hole 56 for centering the front disk 30.
  • the front disk 30 can be assembled to the rear drum 28, and the assembly thus forms the fixed magnetic core 26.
  • This design makes it possible to produce a fixed magnetic core 26 in two parts, the rear shank 28 being made by extrusion, bar turning or sintering, while the front disk 30 is obtained by cutting with the press, which makes it possible to reduce significantly the costs of manufacturing a fixed magnetic core 26 as described.
  • the manufacture of the front disc 30 requires, by its thickness, the use of a high power hydraulic press and the cutting time of such a disc before 30 is high, so expensive.
  • the invention makes it possible to remedy this disadvantage.
  • the two-part fixed magnetic core 26 shown in FIGS. 3 to 5 comprises a rear shank 28, identical to that described with reference to FIG. .
  • the front disc 30 is composed of an assembly of thin sheets 32, here four in number, stacked axially on one another, and whose stack forms a front disc 30 of general shape similar to that previously described. 2 each plate 32 has a centering hole 56, of diameter equal to that of the front disc 30, previously described with reference to FIG. 2, and the stack of sheets 32 is of a total thickness which is equal to that of the ring 54 of the rear shank 28, so that the front annular end 55 of the ring 54 is located in the transverse plane of the front face 33 E of the front end plate 32 E of the stack .
  • Each sheet 32 can be advantageously cut using a low power hydraulic press, and in reduced time, which can significantly reduce manufacturing costs.
  • the sheets 32 are subsequently linked to each other by staples (not shown) so as to form the front disc 30.
  • the stack of sheets 32 which constitutes the front disc 30 comprises at its periphery two diametrically opposite axial grooves 58, which are intended to allow the passage of an electrical conductor 60 of mass of the coil 20.
  • the grooves 58 of the sheet assembly 32 which forms the front disc 30 are obtained by a similar cut made in each of the sheets 32.
  • the front end disk 32 E has on its outer face 33 E a radial tab 62 which is cut by example by punching in the front end disk 32 E , and which can be spread by folding to let the electrical conductor ground 60 and then folded axially backwards to immobilize it with respect to the front disk 30.
  • the radial tab 62 guarantees a good mechanical resistance of the lead wire 60 on the front disc 30 by discharging the solder electrical conductor mass 60 mechanical stresses that might apply.
  • FIG. 6 shows a second embodiment of the invention in which the front end plate 32 E of the assembly of sheets forming the front disc 30 comprises lugs 64 of substantially axial orientation and facing the before, so as to allow attachment by welding or brazing an electronic card 66.
  • the pins 64 are at least two in number, to ensure good attachment of the electronic card 66, but this choice is not restrictive and they can be more numerous.
  • the manufacture of the fixed magnetic core 26 is similar to that of the fixed magnetic core 26 previously described with reference to FIGS. 3 to 5, the lugs 64 being made in the same way as the radial tab 62 previously described, ie cut out, for example by punching, near the periphery of the end plate 32 E , then folded perpendicularly thereto in the axial direction XX so that they extend forward of the end plate 32 E which can then be stapled to the other sheets 32.
  • the electronic card 66 associated with the lugs 64 comprises two diametrically opposed substantially rectangular slots 68 intended to be traversed by the lugs 64 so that they are welded on the electronic card. 66.
  • the end plate 32 E is tinned during the manufacturing process of the fixed magnetic core 26 to facilitate the welding of the electronic card 66 on the pins 64.
  • the lugs 64 of the front end plate 32 E are aligned radially with the groove 58 formed in the stack of sheets 32, and the electronic card 66 has two holes 70, diametrically opposed and aligned with the lights 68, to allow the passage of the ground conductor 60 of the previously described coil.
  • ground conductor 60 of the coil can therefore advantageously be soldered directly on the electronic card 66.
  • a third embodiment of the invention comprises a magnetic core of general construction similar to the previous ones, which comprises a sheet 32 E whose edge 72 comprises four points 74 intended to penetrate the cylindrical housing 11 of the carcass 12, previously described with reference to Figure 1.
  • the spikes are four in number, but it is sufficient that the sheet 32 E comprises at least three and that they are distributed at regular angular intervals.
  • the tips 74 penetrate radially and outwardly into the material of the carcass 12 to ensure satisfactory electrical contact mass between the fixed magnetic core 26 and the carcass 12 of the coil.
  • the use of a stack of thin sheets makes it possible to produce functional forms such as grooves 58, lugs 64 or points 74 by a method of manufacturing and easy implementation, which allows a significant lowering of production costs.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP99941683A 1998-09-03 1999-09-03 Contacteur de demarreur comportant un noyau magnetique fixe en plusieurs parties Expired - Lifetime EP1029334B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9811121A FR2783089B1 (fr) 1998-09-03 1998-09-03 Contacteur de demarreur comportant un noyau magnetique fixe en plusieurs parties
FR9811121 1998-09-03
PCT/FR1999/002100 WO2000014758A1 (fr) 1998-09-03 1999-09-03 Contacteur de demarreur comportant un noyau magnetique fixe en plusieurs parties

Publications (2)

Publication Number Publication Date
EP1029334A1 EP1029334A1 (fr) 2000-08-23
EP1029334B1 true EP1029334B1 (fr) 2006-10-04

Family

ID=9530163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99941683A Expired - Lifetime EP1029334B1 (fr) 1998-09-03 1999-09-03 Contacteur de demarreur comportant un noyau magnetique fixe en plusieurs parties

Country Status (8)

Country Link
US (1) US6281770B1 (ja)
EP (1) EP1029334B1 (ja)
JP (1) JP2002524826A (ja)
KR (1) KR100671572B1 (ja)
BR (1) BR9906759B1 (ja)
DE (1) DE69933430T2 (ja)
FR (1) FR2783089B1 (ja)
WO (1) WO2000014758A1 (ja)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4577195B2 (ja) * 2005-11-29 2010-11-10 株式会社デンソー マグネットスイッチ
JP4569542B2 (ja) * 2006-02-13 2010-10-27 株式会社デンソー 電磁スイッチ及びその製造方法
JP4525610B2 (ja) * 2006-02-23 2010-08-18 株式会社デンソー 電磁スイッチ
JP4569547B2 (ja) * 2006-02-23 2010-10-27 株式会社デンソー 電磁スイッチ
US7761018B2 (en) * 2007-07-31 2010-07-20 Ricoh Company, Limited Image forming apparatus
JP4883372B2 (ja) * 2007-08-08 2012-02-22 株式会社デンソー マグネットスイッチ及びその製造方法
EP2023363B1 (en) 2007-08-08 2017-08-30 Denso Corporation Magnet switch with magnetic core designed to ensure stability in operation thereof
JP6049335B2 (ja) * 2012-07-20 2016-12-21 三菱電機株式会社 電磁操作機構

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE900847C (de) * 1944-08-23 1954-01-04 Bosch Gmbh Robert Elektromagnetischer Schalter
US3822469A (en) * 1970-12-08 1974-07-09 Lucas Industries Ltd Method of making a solenoid for use in an engine starting mechanism
US3792298A (en) * 1972-08-24 1974-02-12 Eaton Stamping Co Electric motor brush card
FR2548280B1 (fr) * 1983-06-30 1987-08-07 Paris & Du Rhone Perfectionnements aux contacteurs de demarreur electrique dont l'axe est independant du noyau mobile
DE3537598A1 (de) * 1985-10-23 1987-05-27 Bosch Gmbh Robert Elektromagnetischer schalter, insbesondere fuer andrehvorrichtungen von brennkraftmaschinen
FR2614363B1 (fr) * 1987-04-22 1991-01-04 Mitsubishi Electric Corp Demarreur de moteur
US5075150A (en) * 1987-06-22 1991-12-24 Linton And Hirst Pack of laminations with projections and depressions in torsionally flexible contact
US4963849A (en) * 1989-04-28 1990-10-16 General Electric Company Compact current limiting circuit breaker
JPH0614481A (ja) * 1992-06-25 1994-01-21 Mitsubishi Electric Corp 電機子鉄心

Also Published As

Publication number Publication date
FR2783089A1 (fr) 2000-03-10
JP2002524826A (ja) 2002-08-06
WO2000014758A1 (fr) 2000-03-16
KR100671572B1 (ko) 2007-01-18
US6281770B1 (en) 2001-08-28
BR9906759B1 (pt) 2013-02-19
KR20010031630A (ko) 2001-04-16
EP1029334A1 (fr) 2000-08-23
BR9906759A (pt) 2000-09-26
DE69933430D1 (de) 2006-11-16
DE69933430T2 (de) 2007-01-11
FR2783089B1 (fr) 2000-10-13

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