TWO-PIECE OIL RING FOR PREVENTING ROTATION AND ROTATION PREVENTIVE STRUCTURE OF TWO-PIECE OIL RING USING THE SAME

PROBLEM TO BE SOLVED: To provide a two-piece oil ring for preventing rotation and a rotation preventive structure of the two-piece oil ring using the same, capable of surely preventing rotation in the circumferential direction of an oil ring in an oil ring groove of a piston, without increasing manu...

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Bibliographische Detailangaben
Hauptverfasser:	SHIBATA SHIRO, MOCHIZUKI HIROSHI, MAKITA TAKESHI
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES BLASTING COMBUSTION ENGINES CYLINDERS CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING PISTONS SEALINGS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a two-piece oil ring for preventing rotation and a rotation preventive structure of the two-piece oil ring using the same, capable of surely preventing rotation in the circumferential direction of an oil ring in an oil ring groove of a piston, without increasing manufacturing cost even by thinning a width of the oil ring, by sufficiently exhibiting the function of scraping away excessive oil in a cylinder inner wall surface of the oil ring and the function of forming a proper oil film on the cylinder inner wall surface.SOLUTION: The two-piece oil ring for preventing the rotation is adopted wherein a lower side rail in an oil ring body has a cutout area formed by cutting out the vicinity of an abutment part on the inner peripheral side including the abutment part, a coil expander has a locking part formed by applying bending work to only its one end side, at least a part of the locking part is arranged in the cutout area of the lower side rail, and a tip side of the locking part is inserted and arranged into a drain hole or a slit groove arranged in the piston for locking the oil ring body and the piston.