As one of the key components of industrial robots, industrial robot bearings are most suitable for joints or rotating parts of industrial robots, rotary tables for machining centers, robot rotating parts, precision rotary tables, medical instruments, measuring instruments, and IC manufacturing. A wide range of applications such as devices. It mainly includes two types of bearings for industrial robots, one is a thin-walled bearing with equal section, and the other is a crossed cylindrical roller bearing. There are also harmonic reducer bearings, linear bearings, joint bearings, etc., but mainly the first two bearings.

Industrial robot bearing features:

1. Can bear the combined load of axial, radial, overturning, etc.;

2. Thin-walled bearings;

3. High rotation positioning accuracy. Any bearing that meets this design requirement can be used in industrial robot arms, swivel joints, and chassis.

Industrial robot bearing classification:

First, the cross roller bearing

The characteristics of the crossed roller bearing: the crossed roller bearing, the cylindrical roller or the tapered roller is arranged perpendicularly to each other through the spacer block on the 90-degree V-shaped groove rolling surface, so the crossed roller bearing can bear the radial direction Multi-directional loads such as load, axial load and moment load. The size of the inner and outer rings is miniaturized, and the extremely thin form is a small size close to the limit, and has high rigidity and accuracy to the P5, P4, and P2 levels. Therefore, it is suitable for joints and rotating parts of industrial robots, rotary tables for machining centers, precision rotary tables, medical equipment, calculators, military, and IC manufacturing equipment.

1, with excellent rotation accuracy:

The internal structure of the crossed roller bearing is arranged at 90° perpendicular to each other by rollers. The spacers or spacers are arranged between the rollers, which can prevent the inclined rollers of the rollers from being mutually inspected and effectively prevent the rotational torque. Increase. In addition, the contact phenomenon or the locking phenomenon of the roller does not occur; at the same time, since the inner and outer rings are divided structures, the gap can be adjusted, and even if the preload is applied, a high-precision rotational motion can be obtained.

2. Operational installation is simplified:

The outer ring or inner ring that is divided into two parts is fixed together after the roller and the retainer are loaded, so the operation is very simple to install.

3. Withstand large axial and radial loads:

Because the rollers are vertically aligned with each other through the spacers on the 90° V-groove rolling surface, this design allows the crossed roller bearings to withstand large radial loads, axial loads and moment loads. Directional load.

4, greatly save installation space:

The size of the inner and outer rings of the crossed roller bearing is miniaturized to a minimum. In particular, the ultra-thin structure is a small size close to the limit and has high rigidity, so it is most suitable for the rotation of the joint portion or the rotating portion of the industrial robot and the machining center. A wide range of applications such as work tables, robot rotating parts, precision rotary tables, medical instruments, measuring instruments, and IC manufacturing equipment.

Cross roller bearing type:

Crossed roller bearing RB type

RB type (outer ring split type, inner ring rotation)

This series is the basic type of crossed cylindrical roller bearings. The inner and outer ring sizes are miniaturized to a minimum. The outer ring is split and the inner ring is one-piece design. It is suitable for parts requiring high inner ring rotation accuracy. .

RE type (internal ring split type, outer ring rotation)

This series model is a new type produced by the RB type design concept, and the main dimensions are the same as the RB type. The structure is that the inner ring is a split type, and the outer ring is an integral design, which is suitable for a portion requiring high rotation precision of the outer ring.

RU type (inner and outer ring integrated type)

This series model does not require a fixed flange and a support base because it has been machined. In addition, since the integrated inner and outer ring structure with the seat is used, the mounting has almost no effect on the performance, so that stable rotation accuracy and torque can be obtained.

Can be used for outer ring and inner ring rotation.

CRB type (outer ring split type, inner ring rotation)

The structure is that the outer ring is a split type, and the inner ring is an integral design without a cage full complement roller bearing. It is suitable for parts requiring high rotation accuracy of the inner ring.

CRBC type (outer ring split type, inner ring rotation)

The structure is that the outer ring is divided and the inner ring is an integral design with a cage full complement roller bearing. It is suitable for parts requiring high rotation accuracy of the inner ring.

CRBH type (inner and outer ring integrated type)

The inner and outer rings of this series are all unitary for the outer ring and inner ring.

RA type (outer ring split type, inner ring rotation)

This series is a compact version that reduces the thickness of the inner and outer rings of the RB type to the limit. Suitable for parts that require a lightweight, compact design, such as industrial robots and robotic rotating parts.

RA-C type (single crack type)

The main dimensions are the same as the RA type. Since the model is a notched structure of the outer ring, the outer ring also has high rigidity, so it can also be used for outer ring rotation.

XR/JXR type (cross tapered roller bearing)

This type of bearing has two sets of raceways and rollers, which are combined at right angles to each other and the rollers are staggered. The cross-sectional height of the bearing is similar to that of a single-row bearing, thus saving space and housing material. The large cone angle and tapered geometry make the overall effective span of the bearing several times the width of the bearing itself. Cross-tapered rollers can withstand high overturning moments and are suitable for machine tools, including vertical boring and grinding tables, precision circular indexing tables, large hobbing machines, turrets, industrial robots, etc.