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DE1003507B - Fastening the threaded or grooved center electrode in the insulating body of a spark plug for internal combustion engines - Google Patents

Fastening the threaded or grooved center electrode in the insulating body of a spark plug for internal combustion engines

Info

Publication number
DE1003507B
DE1003507B DEG18565A DEG0018565A DE1003507B DE 1003507 B DE1003507 B DE 1003507B DE G18565 A DEG18565 A DE G18565A DE G0018565 A DEG0018565 A DE G0018565A DE 1003507 B DE1003507 B DE 1003507B
Authority
DE
Germany
Prior art keywords
center electrode
insulating body
threaded
spark plug
fastening
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.)
Pending
Application number
DEG18565A
Other languages
German (de)
Inventor
Walter Goetze
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DEG18565A priority Critical patent/DE1003507B/en
Publication of DE1003507B publication Critical patent/DE1003507B/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
    • H01T13/34—Sparking plugs characterised by features of the electrodes or insulation characterised by the mounting of electrodes in insulation, e.g. by embedding

Landscapes

  • Insulating Bodies (AREA)

Description

Befestigung der mit Gewinde oder Rillen versehenen Mittelelektrode im Isolierkörper einer Zündkerze für Brennkraftmaschinen Die Erfindung betrifft die Befestigung der Mittelelektrode im Isolierkörper einer Zündkerze für Brennkraftmaschinen. Sie bezweckt einen unbedingt festen und dichten Sitz der Mittelelektrode im Isolierkörper.Attachment of the threaded or grooved center electrode in the insulating body of a spark plug for internal combustion engines The invention relates to the fastening of the center electrode in the insulating body of a spark plug for internal combustion engines. Its purpose is to ensure that the center electrode is seated firmly and tightly in the insulating body.

Es ist bekannt, die Mittelelektrode in die mit Gewinde versehene Längsbohrung des Isolierkörpers einzuschrauben. Die Gewindebohrung im Isolierkörper ist jedoch schwierig herzustellen. Ferner ist bekannt, die Mittelelektrode, welche mit Gewinde oder Hieb versehen ist, in einer gewindelosen Isolierkörperbohrung ohne Preßsitz nur durch Kitt zu befestigen. Diese Befestigungsart stellt besonders hohe Anforderungen an die Kittung. Wird diese durch irgendwelche Ursachen zerstört, so kann die Mittelelektrode dem Gasdruck während des Betriebes nicht widerstehen, und die Zündkerze wird zerstört.It is known to insert the center electrode into the threaded longitudinal bore screw in the insulator. However, the threaded hole in the insulator is difficult to manufacture. It is also known, the center electrode, which is threaded or cut is provided in a threadless insulator bore without a press fit can only be attached with putty. This type of fastening makes particularly high demands to the putty. If this is destroyed by any cause, the center electrode can not withstand the gas pressure during operation and the spark plug will be destroyed.

Die Erfindung schlägt vor, die Mittelelektrode, welche ein Gewinde oder Rillen aufweist und mit Kitt bestrichen ist, in eine gewindelose runde oder eckige Längsbohrung des Isolierkörpers einzupressen. Dabei muß der Durchmesser der Bohrung des Isolierkörpers im Toleranzbereich des Flankendurchmessers des Mittelelektrodengewindes oder der Rillen liegen. Beim Einpressen der Mittelelektrode 1 (s. Zeichnung) wird in der gewindelosen Bohrung 5 des Isolierkörpers2 ein Preßsitz erzielt, indem sich die Spitzen4 des Gewindes 3 oder der Rillen der Mittelelektrode 1 umbiegen. Es sind dabei geringe Toleranzen der Bohrung 5 des Isolierkörpers 2 belanglos. Die Gewindespitzen 4 der Mittelelektrode biegen sich beim Einpressen in die Isolierkörperbohrung 5 in Richtung auf das Anschlußende der Mittelelektrode um und widerstehen dadurch gut dem Gasdruck, der während des Betriebes auf die zündseitige Stirnfläche der Mittelelektrode wirkt. Das Einhaken der Gewindespitzen in den Isolierkörper ergibt eine einwandfreie Dauerbefestigung der Mittelelektrode. Die gewindelose Isolierkörperbohrung ist einfacher herstellbar und bruchsicherer als die mit Gewinde versehene Längsbohrung bekannter Isolierkörper. Beim Preßvorgang wirkt der seitliche Druck in der Bohrung 5 äußerst schonend auf den Isolierkörper, da sich die Spitzen 4 des Gewindes 3 oder der Rillen jeweils nacheinander umbiegen.The invention proposes the center electrode, which has a thread or has grooves and is coated with putty, into a threadless round or Press in a square longitudinal hole in the insulator. The diameter of the Bore of the insulator in the tolerance range of the pitch diameter of the center electrode thread or the grooves. When pressing in the center electrode 1 (see drawing) in the unthreaded bore 5 of the insulating body 2 achieved a press fit by Bend the tips 4 of the thread 3 or the grooves of the center electrode 1. There are while small tolerances of the bore 5 of the insulating body 2 are irrelevant. The thread tips 4 of the center electrode bend when pressed into the insulator bore 5 toward the terminal end of the center electrode and thereby resist good for the gas pressure that is exerted on the ignition-side face of the during operation Center electrode works. The hooking of the thread tips into the insulating body results a perfect permanent attachment of the center electrode. The threadless insulator bore is easier to manufacture and more break-proof than the threaded longitudinal bore known insulator. During the pressing process, the lateral pressure acts in the bore 5 extremely gentle on the insulating body, since the tips 4 of the thread 3 or bend the grooves one after the other.

Claims (1)

PATENTANSPRUCH: Befestigung der mit Gewinde oder Rillen versehenen Mittelelektrode im Isolierkörper einer Zündkerze für Brennkraftmaschinen, dadurch gekennzeichnet, daß die Mittelelektrode (1) in eine gewindelose runde oder eckige Längsbohrung (5) des Isolierkörpers mit Kitt eingepreßt ist, deren Bohrungsdurchmesser bzw. -breite im Toleranzbereich des Flankendurchmessers des Elektrodengewindes (3) oder der Rillen liegt. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 609 353, 601929, 564360. PATENT CLAIM: Fastening of the threaded or grooved center electrode in the insulating body of a spark plug for internal combustion engines, characterized in that the center electrode (1) is pressed into a threadless round or angular longitudinal bore (5) of the insulating body with cement, the bore diameter or width of which is in Tolerance range of the pitch diameter of the electrode thread (3) or the grooves. Considered publications: German Patent Specifications No. 609 353, 601929, 564360.
DEG18565A 1955-12-12 1955-12-12 Fastening the threaded or grooved center electrode in the insulating body of a spark plug for internal combustion engines Pending DE1003507B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEG18565A DE1003507B (en) 1955-12-12 1955-12-12 Fastening the threaded or grooved center electrode in the insulating body of a spark plug for internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG18565A DE1003507B (en) 1955-12-12 1955-12-12 Fastening the threaded or grooved center electrode in the insulating body of a spark plug for internal combustion engines

Publications (1)

Publication Number Publication Date
DE1003507B true DE1003507B (en) 1957-02-28

Family

ID=7121075

Family Applications (1)

Application Number Title Priority Date Filing Date
DEG18565A Pending DE1003507B (en) 1955-12-12 1955-12-12 Fastening the threaded or grooved center electrode in the insulating body of a spark plug for internal combustion engines

Country Status (1)

Country Link
DE (1) DE1003507B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1074322B (en) 1960-01-28 Nienburger Metallwarenfabrik Adolf Thies G.m.b.H., Nienburg/Weser Gas-tight fastening of the center electrode in the insulating body of spark plugs for internal combustion engines
DE2645034A1 (en) * 1975-10-21 1977-05-05 Jacques Lucien Djeddah IGNITION DEVICE, IN PARTICULAR SPARK PLUG OR IGNITION ELECTRODE FOR BURNER
WO1986001878A1 (en) * 1984-09-21 1986-03-27 Robert Bosch Gmbh Sheathed-element glow plug for internal combustion engines

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE564360C (en) * 1931-04-13 1932-11-18 Ac Sphinx Sparking Plug Compan Spark plug
DE601929C (en) * 1934-08-28 Robert Bosch Akt Ges Spark plug
DE609353C (en) * 1933-09-05 1935-02-13 Geis G M B H Spark plug

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE601929C (en) * 1934-08-28 Robert Bosch Akt Ges Spark plug
DE564360C (en) * 1931-04-13 1932-11-18 Ac Sphinx Sparking Plug Compan Spark plug
DE609353C (en) * 1933-09-05 1935-02-13 Geis G M B H Spark plug

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1074322B (en) 1960-01-28 Nienburger Metallwarenfabrik Adolf Thies G.m.b.H., Nienburg/Weser Gas-tight fastening of the center electrode in the insulating body of spark plugs for internal combustion engines
DE2645034A1 (en) * 1975-10-21 1977-05-05 Jacques Lucien Djeddah IGNITION DEVICE, IN PARTICULAR SPARK PLUG OR IGNITION ELECTRODE FOR BURNER
WO1986001878A1 (en) * 1984-09-21 1986-03-27 Robert Bosch Gmbh Sheathed-element glow plug for internal combustion engines

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