Slewing bearing with three-row column combined structure

Abstract

The invention discloses a slewing bearing with a three-row column combined type structure. The slewing bearing comprises an inner ring and an outer ring, wherein the inner ring comprises a first innerring body and a second inner ring body; the first inner ring body and the second inner ring body are overlapped and fixedly connected through screws so as to form the inner ring; the outer ring is arranged outside the inner ring in a sleeving mode; a first rolling body is arranged between the outer side of the first inner ring and the inner side of the outer ring; axis fan-shaped first retainersare arranged at the two ends of the first rolling body; a second rolling body and a third rolling body are arranged between the outer side of the second inner ring and the inner side of the outer ring; axis fan-shaped second retainers are arranged at the two ends of the second rolling body; and radial fan-shaped retainers are arranged at the two ends of the third rolling body. The slewing bearingwith the three-row column combined type structure provided by the invention is suitable for slewing bearings, so that the first rolling body, the second rolling body and the third rolling body are respectively uniform, mutual interference friction during rolling is avoided, the contact stress of a roller path is reduced, and the crushing phenomenon of the edge of the roller path is avoided.

Description

technical field [0001] The invention belongs to the technical field of slewing bearings, in particular to a slewing bearing with a combined structure of three rows of columns. Background technique [0002] The slewing ring is a new type of mechanical component that has gradually emerged in the world in the past forty years. It consists of inner and outer rings, rolling elements, etc.; [0003] The three-row roller slewing bearing has three seat rings, and the upper and lower raceways are separated from the radial raceway, so that the load of each row of rollers can be determined exactly, and it can bear various loads at the same time. The one with the largest capacity, the axial and radial dimensions are large, and the structure is firm. It is especially suitable for heavy machinery requiring large diameters, such as bucket wheel excavators, wheeled cranes, marine cranes, port cranes, molten steel platforms and In large-tonnage truck cranes and other machinery, the rolling ...

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Problems solved by technology

[0003] The three-row roller slewing bearing has three seat rings, and the upper and lower raceways are separated from the radial raceway, so that the load of each row of rollers can be determined exactly, and it can bear various loads at the same time. The one with the largest capacity, the axial and radial dimensions are large, and the structure is firm. It is especially suitable for heavy machinery requiring large diameters, such as bucket wheel excavators, wheeled cranes, marine cranes, port cranes, molten steel platforms and In large-tonnage truck cranes and other machinery, the rolling elements of the existing three-row roller slewing ring are prone to interference friction when rolling, resulting in a large contact stress on the raceway and prone to crushing on the edge of the raceway

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