| 摘要 |
<p>The disclosed helicopter power transmitting apparatus can transmit rotational torque of one engine input to a large diameter gear (3) linked (securely and uniformly) with a main rotor driving shaft (2) through a pair of gear trains. The helicopter power transmitting apparatus comprises a large diameter gear (3); first and second small diameter gears (4a,4b) both having the same diameter and the same number of teeth in mesh with the large diameter gear; a first large diameter helical gear (6a) linked with the first small diameter gear (4a) via a first shaft (5a) over the first small diameter gear (4a); a second large diameter helical gear (6b) linked with the second small diameter gear (4b) via a second shaft (5b) under the second small diameter gear (4b); an input shaft (7) arranged roughly in parallel to the first and second shafts (5a,5b); an outer cylinder (8) slidably fitted to an outside of the input shaft (7); and first and second small diameter helical gears (9,9') fixed to both upper and lower ends of the outer cylinder in mesh with the first and second large diameter helical gears (6a,6b), respectively. In particular, the first and second shafts (5a, 5b) have such flexural rigidity relationship as to substantially eliminate a phase difference between the first and second small diameter gears (4a,4b), against the unbalanced forces applied to the first and second shafts (5a,5b), respectively when the first and second small diameter gears (4a, 4b) transmit the same torque to the large diameter gear (3). <IMAGE></p> |
