Semi -enclosed tapered roller bearing of blocking net

The utility model provides a semi -enclosed tapered roller bearing of blocking net. Include bearing inner race, a bearing inner race and assemble in tapered roller between the two, bearing inner race's the height that highly is greater than bearing inner race, form a step in bearing inner race and bearing inner race's combination department, step department install dust keeper, but dust keeper form for the amalgamations of a plurality of piece detaching board, whole step and bearing inner race's upper surface is lived to the parcel to brink of inner wall parallel and level with bearing inner race, dust keeper and bearing inner race's upper surface between be provided with the clearance, it has gelatineous lubricating oil to fill in the clearance. The utility model discloses simple structure on the basis that does not change present bearing arrangement, can prevent to corrode to sealing up between the outer lane of bearing and the tapered roller, reduces the frictional resistance of bearing, reduces the wearin