1.1 Structure of crossed cylindrical roller bearings

The structure of the crossed cylindrical roller bearing is divided into outer ring segmentation, inner ring integral, outer ring integral, inner ring segmentation and outer ring inner ring are all three forms. The rolling elements are cylindrical rollers, which are arranged at 90° perpendicular to each other. In the V-shaped raceway, the rollers are separated by an isolation block. This structure allows a single bearing to withstand loads in all directions, such as axial loads, radial loads and overturning moments. At the same time, because the outer dimensions are miniaturized, and the bearings have high rigidity, high rotation accuracy and high load carrying capacity, they are most suitable for the rotary work of the joints or rotating parts of the industrial robots and the machining center. Uses for tables, robot rotating parts, precision rotary tables, medical equipment, measuring instruments, etc.

  1.2 Cross cylindrical roller bearing types and characteristics

1.2.1 Type RB (outer ring split, inner ring as a whole) This model is the basic type of cross roller bearing.

              The outer ring is divided into two pieces, and the inner ring is an integral structure, which is most suitable for occasions requiring the rotation accuracy of the inner ring. For example, it can be used in the rotating part of the indexing table of a machine tool.

1.2.2 RE type (outer ring integral, inner ring split) is also the basic type of crossed roller bearing, the outer dimensions are the same as the RB type, the structure is the inner ring as a whole, and the outer ring is divided into two pieces. It is best suited for applications where the outer ring rotation accuracy is required.

1.2.3 RU type (outer ring inner ring integral type), since the outer ring and inner ring have mounting holes, it is not necessary to fix the flange and the support seat during installation. In addition, since the outer ring and the inner ring are both integral structures, the mounting has almost no effect on the performance, so that stable rotation accuracy and torque can be obtained, and it can be used for the case where the outer ring and the inner ring rotate.

1.2.4 RA type (outer ring split, inner ring integral) This model is a compact type that reduces the thickness of the inner and outer rings of the RB type to the limit. The structure is the same outer ring structure as the RB type, which is most suitable for the required weight. Light, compact design parts such as robots and robotic rotating parts.

1.2.5 CRBH type (outer ring inner ring integral type), this model is ultra-thin type RU. Due to the ultra-thin design and no mounting holes in the outer ring and inner ring, only the fixing flange and the support seat are required for installation. can. In addition, since the outer ring and the inner ring are both integral structures, the mounting has almost no effect on performance, so stable rotation accuracy and torque can be obtained. Can be used for the rotation of the outer ring and inner ring.

1.2.6 SX type SX type (outer ring inner ring integral type), in the same journal case, this type has a smaller cross-sectional size than the CRBH type. Due to the ultra-thin design, the outer ring and inner ring are not. Mounting holes require mounting flanges and support seats for installation.