Gear box ventilator oil retaining device

A gear box ventilator oil retaining device comprises a gear box, a ventilator and an oil retaining device, wherein the ventilator is mounted at the top of a gear box body, the oil retaining device is fixed at an inlet of the ventilator in the gear box body and comprises a rectangular oil retaining plate a, a rectangular oil retaining plate b and a vertical plate, the width of the oil retaining plate a is equal to the inner width of the gear box body, the oil retaining plate a is horizontal in the length direction and inclined downwards, one end of the oil retaining plate a is welded on the gear box body, the other end of the oil retaining plate a is welded at the end part of the vertical plate, the other end of the vertical plate is perpendicularly welded on the gear box body, the width of the vertical plate is same with the widths of the oil retaining plate a and the oil retaining plate b, the oil retaining plate b is horizontal in the length direction and inclined downwards, one end of the oil retaining plate b is welded on the oil retaining plate a, the other end of the oil retaining plate b is welded on the vertical plate, and ventilation holes are formed the oil retaining plate a and the oil retaining plate b in a dislocation manner. According to the gear box ventilator oil retaining device, lubrication oil can be effectively from being splashed, consumption of the lubrication oil and environment pollution are avoided, and normal work of a gear is guaranteed.