TRANSMISSION CAPABLE PRESELECTING GEARS

摘要

A transmission capable preselecting gears. An input gear (15) is sleeved on a tail portion of an input shaft (2). Two epicyclic gear trains are arranged in a shell (1). A sun gear (4a) is further mounted on a shaft body of a sun gear shaft (4), and the sun gear (4a) is engaged with a planetary gear (5). The planetary gear (5) is sleeved on a planet carrier (7), and the planet carrier (7) is connected to a transmission mechanism. The gear ring (6) is supported in the shell (1) through a bearing. A gear ring shaft (6b) is fixedly connected to a tail portion of the gear ring (6). A countershaft gear is sleeved on the gear ring shaft (6b), and the countershaft gear is engaged with an output gear. 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 reduces the energy loss, and has a simple structure and low energy consumption.