Worm gear combination slewing bearing

The utility model discloses a worm gear combination slewing bearing and relates to slewing bearings. A retaining frame (4) is disposed between an inner ring (8) and an outer ring (1). Steel balls (3) are disposed in the retaining frame (4). Ball loading holes are formed in the inner ring (8). A ball loading plug (6) is disposed in each ball loading hole. Each ball loading plug (6) is connected with the inner ring (8) through a taper pin (5) disposed on the side of the inner ring (8). A worm gear (2) is disposed on the outer side of the outer ring (1). The worm gear (2) is connected with the outer ring through a set screw (7). The worm gear combination slewing bearing is high in practicality and convenient to mount and maintain, and motion and power between two spatially-staggered shafts are transmitted through the worm gear, so that large axial load, radial load and upsetting moment can be borne by the bearing. Meanwhile, precise transmission is achieved.