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DE1025671B - Piston pin - Google Patents

Piston pin

Info

Publication number
DE1025671B
DE1025671B DESCH20163A DESC020163A DE1025671B DE 1025671 B DE1025671 B DE 1025671B DE SCH20163 A DESCH20163 A DE SCH20163A DE SC020163 A DESC020163 A DE SC020163A DE 1025671 B DE1025671 B DE 1025671B
Authority
DE
Germany
Prior art keywords
piston
piston pin
tubes
spacers
engines
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
DESCH20163A
Other languages
German (de)
Inventor
Dipl-Ing Karl Ritz
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.)
Karl Schmidt GmbH
Original Assignee
Karl Schmidt 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 Karl Schmidt GmbH filed Critical Karl Schmidt GmbH
Priority to DESCH20163A priority Critical patent/DE1025671B/en
Publication of DE1025671B publication Critical patent/DE1025671B/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J1/00Pistons; Trunk pistons; Plungers
    • F16J1/10Connection to driving members
    • F16J1/14Connection to driving members with connecting-rods, i.e. pivotal connections
    • F16J1/16Connection to driving members with connecting-rods, i.e. pivotal connections with gudgeon-pin; Gudgeon-pins
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00Pivots; Pivotal connections
    • F16C11/02Trunnions; Crank-pins
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00Engines characterised by air compression and subsequent fuel addition
    • F02B3/06Engines characterised by air compression and subsequent fuel addition with compression ignition

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Description

Kolbenbolzen Um die dynamischen Beanspruchungen, denen Kolbenbolzen in Motoren höherer Drehzahl unterworfen sind, aufnehmen zu können, werden die: Kolbenbolzen bekanntlich aus hochwertigen metallischen Werkstoffen oder auch entsprechend starkwandig ausgeführt.Piston pins To the dynamic stresses, which piston pins are subject to higher speed in engines to be able to accommodate the: piston pins known to be made of high-quality metallic materials or correspondingly thick-walled executed.

Die Kolbenbolzen sind Spannungen unterworfen, die durch das. Zusammenwirken der Betriebskräfte entstehen und die in der Regel größer sind als die Summe der Eigenspannungen. Der Hauptspannungsanteil rührt von den Ovalverformungskräften in. den Kolbenbolzenaugen her. Die Summenspannung nimmt Maximalwerte an den Stellen an, die zwischen den Kolbenbolzenaugen einerseits und dem Pleuelauge andererseits liegen. Dort entstehen deshalb des öfteren Anrisse.The piston pins are subjected to stresses caused by the interaction of the operating forces arise and which are usually greater than the sum of the Residual stresses. The main stress component comes from the oval deformation forces in. the piston pin bosses. The total voltage takes maximum values at the points between the piston pin bosses on the one hand and the connecting rod boss on the other lie. Therefore cracks often occur there.

Der Anrißgefahr in den beschriebenen Zonen kann dadurch begegnet werden, daß die Hauptspannung, nämlich die von einer Ovalverformung begleitete Spannung, herabgesetzt wird. In Verfolg dieser Absicht ist bereits vorgeschlagen worden., an den beschriebenen, gefährdeten Stellen des Kolbenbolzens radial wirkende Stege, Scheiben, Ringe od. dgl. Versteifungsglieder im Innern des hohlen Bolzens vorzusehen und mit dem Hohlkörper fest zu verbinden.The risk of cracking in the zones described can be countered by that the principal stress, namely the stress accompanied by an oval deformation, is reduced. With this aim in mind, it has already been proposed., radially acting webs at the described, endangered points of the piston pin, Discs, rings or the like stiffening members to be provided in the interior of the hollow bolt and to be firmly connected to the hollow body.

Die vorliegende Erfindung befaßt sich mit demselben Problem, geht jedoch darüber hinaus und hat einen. leichter gestalteten Bolzen bei gleicher Dauerfestigkeit zum Ziel.The present invention addresses the same problem however beyond and has one. lighter designed bolts with the same fatigue strength to the goal.

Bolzen für Kolben in Dieselmotoren müssen oft mit Rücksicht auf hohe Verbrennungsdrücke kräftig dimensioniert sein, während die gleichzeitig angewendete höhe Drehzahl größere Massen verbietet. Es muß ein Optimum zwischen Masse und Festigkeit gefunden. werden.Bolts for pistons in diesel engines often have to be high in consideration Combustion pressures must be powerfully dimensioned while simultaneously applied high speed prohibits larger masses. There must be an optimum between mass and strength found. will.

Um diesen Anforderungen zu entsprechen, wird gemäß einem ersten Merkmal der Erfindung der Kolbenbolzen in an sich bekannter Weise in Form eines Mehrwandrohres, vorzugsweise Doppelwandrohres, ausgeführt; dabei werden diese konzentrisch zueinander liegenden Rohre mittels ringförmiger Abstandhalter verbunden. Ein zweites Merkmal der Erfindung sieht kräftiger als diese Abstandhalter ausgebildete Innenversteifungen, wie z. B. Seheiben, Ringe od. dgl. Abstützungen, in demjenigen Gebiet des Bolzens vor, welches zwischen Kolben- und Pleuelauge zu liegen kommt. Alle Teile sind tunlichst miteinander fest, vorzugsweise durch. Schweißen, zusammenzuhalten.. Dabei besteht die Erfindung nicht in den genannten Einzelmerkmalen als solchen, wohl aber in deren Vereinigung.In order to meet these requirements, according to a first feature the invention of the piston pin in a known manner in the form of a multi-wall tube, preferably double-walled pipe, executed; in doing so, these become concentric to one another lying pipes connected by means of annular spacers. A second feature the invention looks stronger than these spacers formed internal stiffeners, such as B. Seheiben, rings or the like. Supports in that area of the bolt which comes to lie between the piston eye and the connecting rod eye. All parts are as far as possible together firmly, preferably through. Welding, sticking together .. This consists the invention not in the individual features mentioned as such, but in their Union.

Die Rohre werden vorzugsweise aus nahtlos gezogenem Material hergestellt. Es besteht aber auch die Möglichkeit das äußere Rohr, das mit den: auf das innere Rohr aufgebrachten Ringen fest verbunden sein muß, aus Bandmaterial herzustellen und nach dem Zusammenbiegen die Stoßfuge, die durch die Ränder des zusammengebogenen Rohres gebildet ist, mittels Stumpfschweißung zu schließen. Dieselben Maßnahmen können auch für mehrere Außenrohre Anwendung finden; sie besitzen keine selbständige, d. h. vom oben beschriebenen Erfindungsgedanken losgelöste, erfinderische Bedeutung.The tubes are preferably made of seamless drawn material. But there is also the possibility of the outer tube, the one with the: on the inner Tube applied rings must be firmly connected to produce from strip material and after bending the butt joint through the edges of the bent Tube is formed to close by means of butt welding. Same measures can also be used for several outer pipes; they do not have a self-employed, d. H. inventive meaning detached from the inventive concept described above.

Die Zeichnung veranschaulicht ein Ausführungsbeispiel. Sie zeigt einen Kolbenbolzen der erfindungsgemäßen Ausführung im Längsschnitt.The drawing illustrates an embodiment. She shows one Piston pin of the embodiment according to the invention in longitudinal section.

Der Kolbenbolzen besteht aus zwei konzentrisch zueinander angeordneten Rohren a und b, die mittels eines ringförmigen Abstandhalters c miteinander verbanden sind. Die Verbindung erfolgt vorzugsweise durch Schweißung. Im Innern des rohrförmigen Teiles a sind :an den dauerbruchanrißgefährdeten Stellen Scheiben d eingeschweißt.The piston pin consists of two concentric to each other Pipes a and b connected to one another by means of an annular spacer c are. The connection is preferably made by welding. Inside the tubular Part a are: washers d welded in at the points at risk of fatigue cracking.

Claims (1)

PATENTANSPRÜCHE: 1. Für schnell laufende Kolbenmaschinen, insbesondere Diesel-Brennkraftmaschinen, bestimmter hohler Kolbenbolzen mit Bitter- oder fachwerkähn lichem Innenaufbau, gekennzeichnet durch seine Ausbildung als Doppel- oder Meh.rfachwandrohr mit ringförmigen Abstandhaltern zwischen diesen Rohren. und durch kräftiger als die genannten Ab- standhalter ausgebildete Innenversteifungen (z. B. Scheiben d) in demjenigen Gebiet des Bolzens, welches zwischen Kolben- und Pleu:elauge zu liegen kommt. 2. Kolbenbolzen nach Anspruch 1, dadurch gekennzeichnet, daß das oder die äußeren Rohre (b) aus einem Metallband bestehen, deren nach dem Zusammenbiegen aneinanderstoßende Ränder durch Schweißen miteinander verbunden sind. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 672 457; französische Patentschrift Nr. 540514; USA.-Patentschrift Nr. 1887 964.PATENT CLAIMS: 1. For high-speed piston engines, especially diesel internal combustion engines, certain hollow piston pins with bitter or fachwerkähn Lichem internal structure, characterized by its design as a double or Meh.rfachwandrohr with annular spacers between these tubes. and by vigorous spacers as said waste formed inner stiffeners (. eg discs d) in the one region of the bolt, disposed between the piston and Pleu: elauge comes to lie. 2. Piston pin according to claim 1, characterized in that the outer tube or tubes (b) consist of a metal band, the edges of which, after being bent together, are connected to one another by welding. Documents considered: German Patent No. 672 457; French Patent No. 540514; U.S. Patent No. 1887,964.
DESCH20163A 1956-05-28 1956-05-28 Piston pin Pending DE1025671B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DESCH20163A DE1025671B (en) 1956-05-28 1956-05-28 Piston pin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH20163A DE1025671B (en) 1956-05-28 1956-05-28 Piston pin

Publications (1)

Publication Number Publication Date
DE1025671B true DE1025671B (en) 1958-03-06

Family

ID=7428675

Family Applications (1)

Application Number Title Priority Date Filing Date
DESCH20163A Pending DE1025671B (en) 1956-05-28 1956-05-28 Piston pin

Country Status (1)

Country Link
DE (1) DE1025671B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0213294A1 (en) * 1985-06-19 1987-03-11 KOLBENSCHMIDT Aktiengesellschaft Wrist pin

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR540514A (en) * 1921-08-17 1922-07-12 Improvements in the establishment of axles for pistons of internal combustion engines
US1887964A (en) * 1930-06-25 1932-11-15 Ray N Steele Wrist pin
DE672457C (en) * 1937-04-24 1939-03-03 Carl Kaelble Hollow piston pin, especially for internal combustion engines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR540514A (en) * 1921-08-17 1922-07-12 Improvements in the establishment of axles for pistons of internal combustion engines
US1887964A (en) * 1930-06-25 1932-11-15 Ray N Steele Wrist pin
DE672457C (en) * 1937-04-24 1939-03-03 Carl Kaelble Hollow piston pin, especially for internal combustion engines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0213294A1 (en) * 1985-06-19 1987-03-11 KOLBENSCHMIDT Aktiengesellschaft Wrist pin

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