| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricating structure of a supercharger, supplying enough lubricating oil to a step-up mechanism in simple and inexpensive constitution, and decreasing the inertia moment in the step-up mechanism and stirring resistance of lubricating oil to reduce power loss. SOLUTION: This lubricating structure of a supercharger includes: the step-up mechanism 32 stored in a second housing 45 to increase the speed of rotation of a driving shaft 37 and transmit the same to a rotating shaft 47; an oil storing chamber 35a for storing lubricating oil for lubricating the step-up mechanism 32; and a pump mechanism 31 driven by the rotation of the driving shaft 37 to supply the lubricating oil stored in the oil storing chamber 35a to the step-up mechanism 32. The pump mechanism 31 is composed of a screw 39 mounted on the driving shaft 37, a pump chamber 34 rotatably supporting the driving shaft 37 and storing the screw 39; and a screw pump including an oil guide hole 34c communicating the oil storing chamber with the interior of the cylinder and an oil guide pipe 41. A gap is formed between the screw 39 and the pump chamber 34. COPYRIGHT: (C)2006,JPO&NCIPI
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