PISTON ASSEMBLY WITH DISTRIBUTED LOADING AND CENTRALLY FASTENED WRIST PIN

The design and construction of past piston assemblies having a wrist pin bolted to a connecting rod had excessive structural components requiring more complex machining procedures and tooling. Additionally, the loading and bolting patterns allowed the wrist pin to flex about the central axis of the...

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Bibliographische Detailangaben
Hauptverfasser:	BRINK, RANDOLPH, C, WALDMAN, DONALD, J
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL CYLINDERS CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES ORMATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHERTHAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04 INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MECHANICAL ENGINEERING PISTONS SEALINGS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	The design and construction of past piston assemblies having a wrist pin bolted to a connecting rod had excessive structural components requiring more complex machining procedures and tooling. Additionally, the loading and bolting patterns allowed the wrist pin to flex about the central axis of the piston assembly causing ultimate failure of the design. The present invention overcomes these problems by providing a piston assembly (10) utilizing a bifurcated connecting rod (36) and a piston (14) having a pair of outer legs (24) and a central leg (26). The outer legs (24) and the central leg (26) contact a wrist pin (44) in three locations substantially distributing the forces across the wrist pin (44) uniformly. A connecting means (54) centrally connects the piston assembly (10) shortening the overall length of the piston assembly (10). This results in a simplified forging or casting process, a more easily machinable piston (14), and a higher reliability design with improved load capacity. Les agencements de pistons conçus et réalisés dans le passé ayant un axe de piston boulonné à la bielle avaient trop de composants structuraux nécessitant des procédures et des outils d'usinage trop complexes. En plus les profils des charges et du boulonnage permettaient à l'axe du piston d'effectuer des mouvements de flexion par rapport à l'axe central de l'agencement de piston, en provoquant finalement la défaillance de l'agencement. La présente invention surmonte ces problèmes en proposant un agencement de piston (10) utilisant un axe de piston bifurqué (36) et un piston (14) ayant une paire de pattes externes (24) et une patte centrale (26). Les pattes externes (24) et la patte centrale (26) sont en contact avec l'axe de piston (44) en trois positions, ce qui permet de répartir les forces sur l'axe de piston (44) d'une manière uniforme. Un moyen de connexion (54) connecte d'une manière centrale l'agencement de piston (10) en raccourcissant la longueur totale de l'agencement de piston (10). Ceci permet de simplifier les opérations de forgeage ou de moulage du piston (14). Ce dernier est en outre plus facile à usiner, il est plus fiable et sa capacité à supporter les charges est améliorée.