Oil pump

An oil pump comprises a cam ring, an outer rotor having inner teeth, which is rotatably provided inside of the cam ring, an inner rotor having outer teeth, which is engageable with the inner teeth of the outer rotor, a drive shaft which ratatably drive the inner rotor. A first housing and second hou...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	OTAKI MIZUO, KURATA MASAKAZU
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING LUBRICATING MACHINES OR ENGINES FOR LIQUIDS MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS PRODUCING MECHANICAL POWER PUMPS FOR LIQUIDS OR ELASTIC FLUIDS ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS STEAM ENGINES THERMAL INSULATION IN GENERAL WEAPONS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
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Beschreibung
Zusammenfassung:	An oil pump comprises a cam ring, an outer rotor having inner teeth, which is rotatably provided inside of the cam ring, an inner rotor having outer teeth, which is engageable with the inner teeth of the outer rotor, a drive shaft which ratatably drive the inner rotor. A first housing and second housing are provided at opposite ends of the cam ring. A plurality of volume chambers are formed between the inner teeth of the outer rotor and the outer teeth of the inner rotor. A first axial hole is formed in the cam ring and is positioned corresponding to a mesh portion having a minimum volume of the volume chambers. A second axial hole is formed in the cam ring and is positioned corresponding to a trap portion having a maximum volume of the volume chambers. A suction port and a discharge port are formed at least in one of said housings and are open to the volume chambers between the mesh portion and the trap potion. All are positioned at a line symmetry of an axis line between the mesh portion and the trap portion.