Patent ID: 11892074
Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A transmission lubricating structure of a helicopter,
the transmission lubricating structure comprising:
a hollow power transmitting shaft including an ejection hole through which an internal space of the power transmitting shaft fluidically communicates with an outside of the power transmitting shaft, the power transmitting shaft being arranged in such a posture as to be inclined relative to a horizontal direction and a vertical direction of the helicopter in a landing state;
bearings supporting the power transmitting shaft such that the power transmitting shaft is rotatable, the bearings being adjacently arranged so as to be lined up in an axial direction of the power transmitting shaft;
a main lubricating circuit including
a main tank in which lubricating oil is stored,
a main nozzle having a nozzle hole through which the lubricating oil supplied from the main tank is discharged to the internal space of the power transmitting shaft, and
a hydraulic pump configured to supply the lubricating oil by pressure from the main tank to the main nozzle; and

an auxiliary lubricating circuit including
an auxiliary tank in which the lubricating oil is stored and
an auxiliary nozzle arranged lower than the auxiliary tank and higher than the bearings at the outside of the power transmitting shaft, the auxiliary nozzle facing an uppermost one of the bearings in an alignment direction where the bearings are lined up, the auxiliary nozzle being configured to drop the lubricating oil, supplied from the auxiliary tank by an own weight of the lubricating oil, toward the uppermost one of the bearings from above in the alignment direction.