Crossed roller bearings are a special type of bearing with a split inner ring and a rotating outer ring. The split inner ring or outer ring is fixed to the cross roller shaft ring after the rollers and spacers are installed to prevent separation, so the installation of the cross roller shaft ring is simple. Because the cross roller bearing is a two-piece structure with an inner ring and an outer ring, the bearing clearance can be adjusted, and it can rotate with high precision even if preloaded. Because of its special structure, it is generally used in joint bearings of industrial robots. Today, let's talk about crossed roller bearings. Let's take a look!

There are two main types of bearings that are widely used in industrial robots: uniform cross-section thin-walled bearings and crossed roller bearings. The bearing of an industrial robot is one of its key accessories, suitable for a wide range of uses such as the joints or rotating parts of industrial robots, the rotary table of a machining center, the rotating part of a robot, a precision rotary table, medical instruments, measuring instruments, and IC manufacturing devices.

Advantages of crossed roller bearings for robots:

1. Excellent rotational accuracy

The internal structure of the crossed roller bearing adopts rollers arranged perpendicularly and crosswise at 90°. Spacers or isolation blocks are installed between the rollers to prevent the rollers from tilting or rubbing against each other, effectively preventing the increase of rotational torque. In addition, there will be no contact or locking of the rollers on one side; at the same time, because the inner and outer rings are divided structures, the gap can be adjusted, and high-precision rotational motion can be obtained even if preload is applied.

2. Simplified operation and installation

The outer ring or inner ring divided into two parts is fixed together after the rollers and retainers are installed, so the operation is very simple during installation.

3. Bear large axial and radial loads

Because the rollers are arranged perpendicularly to each other on the 90° V-groove rolling surface through the spacer retainer, this design allows the crossed roller bearing to withstand large radial loads, axial loads, moment loads and other loads in all directions.

4. Greatly save installation space

The inner and outer ring sizes of the crossed roller bearings are miniaturized to the maximum extent, especially the ultra-thin structure is close to the limit of small size, and has high rigidity, so it is suitable for the joints or rotating parts of industrial robots, rotary tables of machining centers, rotating parts of manipulators, precision rotary tables, medical instruments, measuring instruments, IC manufacturing devices and other wide applications.

The above is all about the advantages of crossed roller bearings for industrial robots. In general, crossed roller bearings are a very suitable bearing for industrial robots. They can make the joints of industrial robots more flexible, and they have excellent rotation accuracy. They are also very simple to operate. The bearings can carry large axial and radial loads, and can greatly save installation space.