Parallel-axis helical gear reducer

The utility model discloses a parallel-axis helical gear reducer, which comprises a box body. A motor, a gear shaft, a linkage shaft and an output shaft are arranged on the box body. A driving gear is sleeved on the output shaft of the motor and the gear shaft is equipped with a driven gear engaged with the driving gear. The gear shaft and the linkage shaft are respectively equipped with mutually engaged helical gears. The linkage shaft is also equipped with a linkage gear engaged with the output gear sleeved on the output shaft. Deep groove ball bearings are arranged not only between the gear shaft and the box body but also between the linkage shaft and the box body. A tapered roller bearing is arranged between the output shaft and the box body. By adopting the above structure, the rotation of the gear shaft is driven by the motor and the rotation of the output shaft is driven via the linkage shaft by the gear shaft so as to achieve the whole deceleration process of the reducer. The reducer of the utility mo