| 摘要 |
<p>A mechanical transmission capable preselecting gears comprises a shell (1), an input shaft (2), and an output shaft (3). An input gear (15) is sleeved on a tail portion of the input shaft (2). Two epicyclic gear trains are arranged in the shell (1). A sun gear shaft (4) of the epicyclic gear train is connected to a transmission mechanism (16). A sun gear (4a) is sleeved at a tail portion of the sun gear shaft (4), and the sun gear (4a) is engaged with a planetary gear (5). A gear ring (6) of the epicyclic gear train is engaged with an input gear (15). Countershaft gears (17, 18, 19, 20) are sleeved on a planet carrier (7) of the epicyclic gear train. The countershaft gears (17, 18, 19, 20) are engaged with output gears (21, 22, 23, 24). The output gears (21, 22, 23, 24) are sleeved on the output shaft (3). Two epicyclic gear trains are disposed in the shell and engaged with the input shaft; the two epicyclic gear trains are switched between the planetary gear train and the differential gear train, achieving the purpose of unintermittent gear shift. The mechanical transmission has a simple structure and low energy consumption.</p> |
