| 摘要 |
<p>A gearbox for a high performance road car comprises a primary shaft (2) with a set of first toothed profiles (21, 22, 23, 24, 25, 26); a secondary shaft (3) with a set of second toothed profiles (31, 32, 33, 34, 35, 36) simultaneously in constant mesh with the first toothed profiles (21, 22, 23, 24, 25, 26), the two sets combining to form distinct gear pairs (M1, M2, M3, M4, M5, M6) with different transmission ratios, ranging from a low ratio or first gear (Ml) to a high ratio; a first synchronizer (6) operating on at least a first pair (Ml) of the toothed profiles (21, 31) in such a way as to couple the first and second shafts (2, 3) in rotation by means of the first pair (M1) of toothed profiles (21, 31) and select the low ratio; and at least one collar (10; 11) with a dog type coupling and no synchronizer, operating on one or more of the remaining gear pairs (M3, M4, M5, M6) providing the higher ratios.</p> |
