| 摘要 |
A method of stepping down the speed of a rotary motion from a first speed, supplied to an input shaft, to a second speed delivered by an output shaft, comprises transmitting said rotary motion to said output shaft, via a driven gear of said output shaft, the driven gear being helical and having a first helix angle, from a layshaft arrangement, so as to generate a first axial thrust of the output shaft in a first axial direction; transmitting said rotary motion to said layshaft arrangement, via a drive gear of said input shaft, said drive gear being helical and having a second helix angle that is larger than said first helix angle, from said input shaft, so as to generate a second axial thrust of the input shaft in a second direction, said second direction being substantially opposite to said first direction; and applying said first axial thrust and said second axial thrust to the same location of an axially rigid support structure, such that said first and second axial thrusts counter-act and at least partly cancel out in said support structure. |
