| 摘要 |
PURPOSE: A structure for reducing noise of an oil pump is provided to reduce noise by forming a plate of a front case oil output part to be inclined, and forming grooves on an inclined surface at regular intervals to reduce fluctuation of pressure of oil pressurized in a pressure generating part. CONSTITUTION: An oil input part and an oil output part are formed in a pump chamber formed on an inside of a front case. The oil input part and the oil output part are formed deeply on a surrounding plate(35). Circumferences of the oil input part and the oil output part are stepped from the surrounding plate. Inclined surfaces(36) are formed on the stepped part between the oil output part and the plate with appropriate inclination. Slots are formed on the inclined surface at fixed intervals. Number of the slots formed on the inclined surface is from three to five. Depth of the slots(37b) on both sides is shallower than the slot(37a) of a center. Width of the slots on the center is wider than width of the slots on both of the sides.
|
