| 摘要 |
PURPOSE:To provide an oil tank in a lower level than a pump and freely arrange the oil tank in a selective position, by imparting a function of sucking lubricating oil to the oil pump of plunger type. CONSTITUTION:A diaphragm 35 is operated to deform its shape with pulsation of internal pressure in crank chamber then a pump shaft 8 is turned through a lever 36. In accordance with turning motion of the pump shaft 8, a plunger 9 is protruded while being turned to increase volume of a pump chamber 14, then a through hole 17 and opening 18 are aligned to flow lubricating oil from a suction side passage 20 to the pump chamber 14. Then the plunger 9 is retracted into the pump chamber 14 to both decrease the volume of the pump chamber 14 and align the through hole 17 to an opening 19, thus the lubricating oil in the pump chamber 14 is fed out to a delivery side passage 21. While projecting and retracting motion of the plunger 9 causes an empty chamber 15 to change its volume, in this way pressure in the empty chamber 15 is changed, then a check valve 28 is open-close operated to forcibly perform suction and press feed of the lubricating oil. |
