Low -grade gear output shaft

The utility model discloses a low -grade gear output shaft, a serial communication port, including the axis body, the middle part of axis body is gear shaft hole, the form of gear shaft hole step shaft, the outside of axis body is equipped with the ring gear, be equipped with to subtract a heavy inner ring, subtract the outside that heavy inner ring is located the inboard shaft hole of ring gear, subtracting the offside that heavily encircles at the axis body and being equipped with one and subtracting heavy inner circle, the diameter that subtracts heavy inner circle is greater than the external diameter that subtracts heavy inner circle, it subtracts heavy endocyclic height to subtract highly being less than of heavy inner circle, the fall ring of indent is equipped with at the edge that subtracts heavy inner circle, compared with the prior art, the setting of this device subtracts heavy regionally, can satisfy the requirement of lightweight and high strength.