| 摘要 |
PURPOSE: An oil pump is provided to enhance an oil pumping efficiency at the oil by forming an alternative oil circulating space between an outer circumference end of an outer rotor and an inside wall of a housing, and filling fully an oil into the oil pumping space. CONSTITUTION: An inner rotor(23) and an outer rotor(24) are contained at an inside of a housing(21) of an oil pump. The inner rotor(23) is supported at the rotating axis(22) cooperating to a crankshaft, and the outer rotor(24) is coupled by the rotor(23) and a gear. An oil circulating space(27) having a certain size is formed between an outer circumference end of the outer rotor and an inside wall of a housing. A part of oil absorbed through an oil intake port(26) is introduced directly into an oil pumping space(25), and the remaining oil is introduced into the oil pumping space(25) from an exterior of the inner rotor and the outer rotor through the oil circulating space(27).
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