Gear unit, particularly for use in a helicopter

Details Gear unit, particularly for use in a helicopter Gear unit, particularly for use in a helicopter

1989-01-09

1991-01-08

Herrmann, Allan D.

Planetary gear transmission systems or components

Planetary gearing or element

Nonplanetary gearing combined with planetary

74416, 74606R, 416170R, F16H 132, F16H 5702, B64C 2712

Patent

active

049831534

ABSTRACT:
In a high-loaded, light-weight, compact, multi-stage gear transmission unit with at least one stage with non-parallel shafts, and a transmission ratio between approximately 70 and 150, like a helicopter transmission, said angle transmission generally forms the weakest link. By adoption of a face gear/cylindrical pinion-stage instead of the commonly used bevelled-stage, not only a more reliable drive is possible, but its efficiency is higher, due to less friction, its size is smaller, its adjustment is simpler such that straight forward replacement becomes possible, and--not in the least--the transmission ratio of said angle drive tends to high ratios in contrast to known bevelled-drives which tend to low ratios. In many cases one or even more stages less become possible, providing a further important reduction in weight and size.

REFERENCES:
patent: 11258 (1854-07-01), McCord
patent: 267440 (1882-11-01), Martin
patent: 2520887 (1950-08-01), Miller, Jr.
patent: 2771143 (1956-11-01), Campbell
patent: 2911851 (1959-11-01), Wachs
patent: 3129608 (1964-04-01), Watson
patent: 3188884 (1965-06-01), Bancroft
patent: 3486832 (1969-12-01), Stone et al.
patent: 3669564 (1972-06-01), Garfinkle
patent: 3762669 (1973-10-01), Curci
patent: 4238970 (1980-12-01), Carter
Journal of the American Helicopter, vol. 29, No. 1, Jan. 1984, Herbert N. Shohet, "Propulsion Systems for Rotary Wing Aircraft with Auxiliary Propulsors", pp. 66-74.
Gear Handbook, Dudley, 1st Edition, McGraw-Hill Book Co., New York, Table 2-2.
Gear Handbook, Dudley, 1st Edition, McGraw-Hill Book Co., New York, pp. 2-9.

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