Crossed roller bearings are also called crossed roller bearings. The rolling elements generally use cylindrical rollers or tapered rollers that are arranged crosswise on the raceway. The rollers are separated by cages or isolation blocks. This kind of cross The structure of the roller arrangement allows a single bearing to withstand various loads such as axial load, radial load and overturning moment. Compared with traditional structural bearings, the rigidity is increased by 3-4 times. It is suitable for various industrial rotating parts, rotating worktables and other applications.
HRBH type (the inner and outer rings do not have mounting holes as a whole). Since the outer and inner rings do not have mounting holes, the flange and support base are required for installation. In addition, since the outer ring and inner ring are both integral structures, installation has no impact on performance, so stable rotation accuracy and torque can be obtained. It is suitable for occasions where the outer ring and inner ring rotate but require miniaturization.
HRU type (integrated inner and outer rings, with mounting holes), because the outer ring and inner ring have mounting holes, no solid flange or support seat is required during installation. In addition, since the outer ring and inner ring are integral structures, installation has almost no impact on performance, so stable rotation accuracy and torque can be obtained, which is suitable for situations where the outer ring and inner ring rotate.
The inner ring and outer ring of HRW bearings adopt an integrated structure design. Since the rolling surface is double-rowed and small-diameter rollers are used, the number of rollers is about 5 times that of the traditional crossed roller ring RU type* (RW228 type ). Torque is reduced while maintaining compactness, increasing rigidity and precision. Since the size and number of mounting bolt holes are optimally designed, rolling surface deformation caused by mounting can be reduced, resulting in stable rotational performance.
Crossed tapered roller bearings consist of two rows of mutually perpendicular bearing raceways and rollers. The rollers are arranged alternately on the raceway, and the bearing assembly height is slightly higher than that of single-row tapered roller bearings. In addition, the inclination angle of the bearing raceway and the tapered roller geometry protect the bearing from stress concentration problems during use. Finally, the effective span of a crossed tapered roller bearing is many times greater than the bearing width.
Because the outer dimensions are miniaturized to the maximum extent, and the bearings have high rigidity, rotation accuracy, and composite load-bearing capacity, they are most used in the joints or rotating parts of industrial robots, the rotating tables of machining centers, and the rotating parts of manipulators. It is used in precision rotating worktables, medical machines, measuring instruments and other occasions.
