摘要:
An angle gear box for a helicopter main rotor drive has a more compact arrangement of the usual gear train elements of the input section as well as a freewheel unit. The input section gear train includes a power input shaft mounted on bearings and having a bevel pinion and a power output shaft mounted on bearings and having a bevel gear meshing with the pinion. The output shaft has an axial chamber in which the freewheel unit is housed and from which it can be readily removed without disturbing the mounting elements of the gear train and the critical relationship of the high speed bevel gears.
摘要:
Disclosed herein is a lower unit for a marine propulsion device including a drive shaft housing, a gearcase housing connected to the end lower of the drive shaft housing and having an interior wall defining an elongated, axially extending cavity, a propeller shaft extending axially in the gearcase housing cavity and carrying a propeller, and a hollow bearing carrier member generally encircling the propeller shaft and carrying a bearing for rotatably supporting the propeller shaft in the gearcase housing cavity. The bearing carrier member is removably fastened by bolts or the like to a resilient, annular anchoring element which fits into and frictionally engages an internal annular groove in the gearcase housing to retain the bearing carrier against the axial displacement relative to the gearcase housing and to minimize rotation of the bearing carrier relative to the gearcase housing. The bearing carrier member includes a radially extending rib which registers with a gap provided in the anchoring element to automatically index the bearing carrier member with the anchoring element during assembly.
摘要:
A bearing is mounted to a casing by undercutting the casing adjacent a shaft aperture to form a recessed shoulder, inserting a bearing mounting sleeve having an outer flange at one end and inner bearing retaining means at the other end into the aperture so that the flange is against the shoulder, and inserting the bearing into the sleeve against the bearing retaining means. The invention is particularly useful in repairing damaged transmissions of the type including output transfer gears.
摘要:
In order to reduce the tilting of the section of a ship''s shafting system which carries the main drive gear and thereby improve the load distribution between meshing gear teeth, a bearing system is provided comprising a pair of ordinary cylindrical journal bearings, one on either side of the main drive gear, and a pair of additional bearings, each located next to one of the cylindrical journal bearings. The latter bearings serve to provide a spring scale in the horizontal direction sufficient to reduce tilting of the main gear shaft section.