EP0588804B1 - Spulenkern mit massekontaktierung - Google Patents

Spulenkern mit massekontaktierung Download PDF

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Publication number
EP0588804B1
EP0588804B1 EP92908833A EP92908833A EP0588804B1 EP 0588804 B1 EP0588804 B1 EP 0588804B1 EP 92908833 A EP92908833 A EP 92908833A EP 92908833 A EP92908833 A EP 92908833A EP 0588804 B1 EP0588804 B1 EP 0588804B1
Authority
EP
European Patent Office
Prior art keywords
core
screw
bore
core package
lamella
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
EP92908833A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0588804A1 (de
Inventor
Friedrich Stegmaier
Dieter Betz
Reinhold Herrmann
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0588804A1 publication Critical patent/EP0588804A1/de
Application granted granted Critical
Publication of EP0588804B1 publication Critical patent/EP0588804B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • 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

Definitions

  • the invention is based on a coil core, in particular for an ignition coil with a ground contact to a holder by means of a connecting element and by removing the insulating layer in the region of the fastening bores.
  • a coil core is known from US-A-4 248 201.
  • Such an iron core usually consists of a large number of individual thin sheet-metal lamellae, which are punched out, isolated by painting and then stacked to form a core package.
  • the individual sheet metal lamellae are riveted or welded together, for example, so that the sheet metal lamellae are electrically connected to one another.
  • These core packages are electrically connected to ground potential, which was previously done when the core package was fastened to a holder with a screw and tooth lock washer.
  • this process e.g. due to insufficient insulation varnish removal, there is not always good ground contact.
  • Another possibility is to press a metallic sleeve into recesses or holes in the core package.
  • the core package is attached to a holder by screwing the sleeve and at the same time a conductive ground connection is made.
  • This ground contact is relatively material-intensive and requires several work steps to manufacture. In the course of ever more cost-effective production, this method of ground contacting is not efficient enough.
  • the arrangement according to the invention with the features of the characterizing part of the main claim has the advantage that the ground contact between the core package and holder is made directly via a screw or the like, so that a toothed washer or sleeve can be dispensed with. Another advantage is that the step of "pressing in the sleeve" is also saved.
  • FIG. 1 shows the top view of a core package
  • FIG. 2 shows the side view of the core package from FIG. 1 with the fastening screw shown
  • FIG. 3 shows a top view of a second core package
  • FIG. 4 shows the side view of the core package from FIG. 3 with the fastening screw.
  • Figures 1 and 2 are to be explained together since they only show the same subject from different views.
  • the core package 1 can be seen made of sheet metal lamella coated with insulating varnish with a bore 2, with all of the remaining bores 2 having this diameter apart from at least one sheet metal lamella 1a.
  • At least one lamella 1a has a smaller diameter 3. It is completely irrelevant at which point in the core package this lamella 1a with the smaller diameter 3 is arranged.
  • the remaining sheet metal lamellae have a diameter of 2, this diameter being chosen so that a fastening screw 4 can easily be inserted into this bore 2 with play.
  • the fastening screw 4 acts like a thread cutter and thus cuts a "partial thread" on the material protrusion 5 into the protruding sheet metal lamella 1 a, the insulating varnish being removed in this area of the sheet metal lamella 1 a and at the same time making a ground contact with the screw 4. So there is no additional effort when screwing the core package to a holder ground contact.
  • the smaller diameter 3 of the one metal plate 1a is chosen so that the screw 4 can be screwed into it without damaging the thread.
  • FIGS. 3 and 4 A further possibility of forming a sheet metal lamella is shown in FIGS. 3 and 4.
  • the one sheet metal lamella 1b is punched with the same diameter as the rest of the core package 1, but with this one sheet metal lamella, a material residue protruding into the bore 2 in the form of a segment section according to FIG. 3 also remains here.
  • This material protrusion 5 is selected so that the screw 4 removes the insulating varnish of the lamella 1a there without damaging the thread and makes a ground contact with a "partial thread".
  • the other, differently shaped sheet metal lamella may have any other cross section of the opening, e.g. to choose a toothed lock washer. It is essential in all cases that the area of the machined material is smaller than that of the other lamellae, which are packed together to form the core package and the remaining opening is larger than the core cross section of the screw 4.
  • a larger material protrusion 5 can also be selected in the bore 2, which protrudes in the screwing direction when the screw 4 is inserted and then presses into the screw thread with its edge freed from the insulating varnish.
  • a rivet or a similar connecting element can also be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Bolts, Nuts, And Washers (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Connection Of Batteries Or Terminals (AREA)
EP92908833A 1991-06-13 1992-04-24 Spulenkern mit massekontaktierung Expired - Lifetime EP0588804B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4119413 1991-06-13
DE4119413A DE4119413C1 (enExample) 1991-06-13 1991-06-13
PCT/DE1992/000330 WO1992022744A1 (de) 1991-06-13 1992-04-24 Spulenkern mit massekontaktierung

Publications (2)

Publication Number Publication Date
EP0588804A1 EP0588804A1 (de) 1994-03-30
EP0588804B1 true EP0588804B1 (de) 1995-10-11

Family

ID=6433795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92908833A Expired - Lifetime EP0588804B1 (de) 1991-06-13 1992-04-24 Spulenkern mit massekontaktierung

Country Status (7)

Country Link
US (1) US5398014A (enExample)
EP (1) EP0588804B1 (enExample)
JP (1) JPH06508240A (enExample)
AU (1) AU651449B2 (enExample)
DE (2) DE4119413C1 (enExample)
ES (1) ES2079189T3 (enExample)
WO (1) WO1992022744A1 (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005028814A1 (de) * 2005-06-22 2007-01-04 Robert Bosch Gmbh Zündspule für eine Brennkraftmaschine
WO2007124714A1 (de) * 2006-05-01 2007-11-08 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Freilauf mit dämpfung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727219A (en) * 1927-09-09 1929-09-03 Joachim B Scharf Battery terminal clamp
FR673231A (fr) * 1928-04-06 1930-01-13 Thomson Houston Comp Francaise Perfectionnements aux systèmes de fabrication des noyaux magnétiques pour appareils électriques
US2135937A (en) * 1937-03-25 1938-11-08 George B Gordon Coupling for wires or electrical conductors
FR2321054A1 (fr) * 1975-08-14 1977-03-11 Sev Marchal Bobine d'allumage
JPS5450733A (en) * 1977-09-30 1979-04-20 Hitachi Ltd Ignitor for internal combustion engine
IT1101065B (it) * 1978-11-13 1985-09-28 Magneti Marelli Spa Bobina d'accensione per autoveicoli
DE3528803A1 (de) * 1985-08-10 1987-02-12 Bosch Gmbh Robert Zuendspule fuer mehrkerzige, verteilerlose zuendanlagen von brennkraftmaschinen, insbesondere fuer kraftfahrzeuge
FR2652195B1 (fr) * 1989-09-15 1992-01-31 Valeo Electronique Bobine d'allumage, en particulier pour moteur a combustion interne de vehicule automobile.

Also Published As

Publication number Publication date
JPH06508240A (ja) 1994-09-14
AU651449B2 (en) 1994-07-21
US5398014A (en) 1995-03-14
AU1574092A (en) 1993-01-12
EP0588804A1 (de) 1994-03-30
WO1992022744A1 (de) 1992-12-23
DE4119413C1 (enExample) 1992-09-17
DE59204007D1 (de) 1995-11-16
ES2079189T3 (es) 1996-01-01

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