Transmission lubricating assembly of helicopter

A transmission lubricating assembly of a helicopter, the transmission lubricating assembly comprising:

• a transmission including a speed change structure that changes the speed of rotation produced by rotational power input from a prime mover and outputs the resulting rotational power and a housing accommodating the speed change structure;
• and
• a lubricator that lubricates the speed change structure, wherein
• the lubricator includes a collector that collects a mist of a lubricating oil in an internal space of the housing and a dropper that is disposed below the collector and that applies droplets of the lubricating oil to the speed change structure, the droplets resulting from the collected mist being gathered under its own weight;
• wherein the lubricator includes a shaft structure extending in a horizontal direction and a tubular structure disposed to enclose an outer peripheral surface of the shaft structure, with a gap defined between an inner peripheral surface of the tubular structure and the outer peripheral surface of the shaft structure, one axial end of the tubular structure is located below the other axial end of the tubular structure, the collector includes the outer peripheral surface of the shaft structure, an end surface of the shaft structure, and the inner peripheral surface of the tubular structure, the end surface of the shaft structure being located towards the one axial end of the tubular structure, the droplets of the lubricating oil are retained in the gap, and the dropper includes a lowermost point of a region of the shaft structure and a lowermost point of a region of the tubular structure, the regions facing each other across the gap.