| 摘要 |
PURPOSE: An oil pump of an automobile is provided to reduce manufacturing cost by reducing manufacturing cost of a metal mold. CONSTITUTION: An oil pump comprises a driving gear(11) having a plurality of teeth(11a) formed on a periphery thereof at regular intervals, and joined to a driving axis to integrally rotate; a housing(12) covering and protecting one side of the driving gear; a housing cover integrally joined to the housing to cover and protect the other side of the driving gear; and a plurality of rollers(14) installed on an inner circumferential surface of the housing at regular intervals to have both ends thereof fixed on the housing and the housing cover, respectively, and contacting with the teeth of the driving gear to freely rotate.
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