Helical gear combination bearing for speed reducer

The utility model discloses a helical gear combination bearing for speed reducer, include: helical gear main shaft, steel ball and holder subassembly, outer lane, first kingpin and holder subassembly, second kingpin and holder subassembly and sleeve, the helical gear main shaft includes first raceway, helical gear, second raceway and third raceway in the past backward in proper order, steel ball and holder unit mount are in first raceway, just steel ball and holder unit mount are passed through on the helical gear main shaft in the outer lane, first kingpin and holder unit mount are in the second raceway, second kingpin and holder unit mount are in the third raceway, just the sleeve through first kingpin and holder subassembly and second kingpin and holder unit mount on the helical gear main shaft. In this way, the utility model discloses compact structure can reduce the together model and the weight of speed reducer, improves combination bearing's bearing capacity simultaneously to can bear great moment of t