| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a resin gear capable of inhibiting the occurrence of cracks in a tooth root even if a dimension from an inner peripheral part of a gear part to a tooth bottom is not sufficiently secured.SOLUTION: A lubrication oil supply device includes: a trochoid pump 54; a lubrication oil passage part 53 which supplies a lubrication oil discharged from a discharge port of the trochoid pump 54 to a crank journal bearing 11 at an engine; a relief valve 66 where a primary side port communicates with the discharge port of the trochoid pump 54 and the primary side port communicates with a secondary side port according to an internal pressure of the primary side port; a sub lubrication oil passage part 67 which supplies the lubrication oil discharged from the secondary side port of the relief valve 66 to an oil seal 44 attached to a crank shaft 4 at the engine.</p> |
