Crossed roller bearings are a special type of bearing that is used for inner ring division and outer ring rotation. Since the separated inner or outer rings are mounted on the roller and spacer brackets and then fixed with the crossed roller collars to prevent them from separating from each other, it is easy to install the crossed roller collars. Since crossed roller bearings are constructed with an inner and outer ring, the bearing clearance can be adjusted. It can rotate with high precision even with preload. Due to its special structure, it is commonly used in the spherical bearings of industrial robots. Today, let's talk about crossed roller bearings. Let's see!
There are two main types of bearings used in industrial robots: cross-sectional thin-walled bearings and crossed roller bearings. The bearing of the industrial robot is one of its key accessories, which is suitable for the joint parts or rotating parts of the industrial robot. Rotary table for machining centers. Manipulator rotating part. Precision rotary table. Medical devices. Measuring instruments. integrated circuit manufacturing equipment, etc.
Advantages of crossed roller bearing industrial robots:
1. Excellent rotation accuracy.
The internal structure of the crossed roller bearing adopts 90° vertical cross arrangement of rollers, and the interval holder or isolation block is installed between the rollers, which can prevent the rollers from tilting or friction between the rollers, and effectively prevent the rotation torque from increasing. In addition, one side of the roller does not touch or lock; At the same time, since the inner and outer rings are split structures, the gap can be adjusted. Even if preload is applied, high-precision rotary motion can be obtained.
2. Simplify operation and installation.
The outer or inner ring is divided into two parts, and after the rollers and retainer are installed, they are fixed together, so the operation is very simple when installing.
3. Bear large axial and radial loads.
Since the rollers are arranged vertically on the rolling surface of the 90°V groove by means of a spacer holder, the crossed roller bearings can withstand greater radial loads. Axial load and torque load.
4. Greatly save the installation space.
The inner and outer rings of crossed roller bearings are small in size, especially the ultra-thin structure is close to the limit and has high stiffness, which is suitable for the joint part or rotating part of industrial robots. Rotary table for machining centers. Manipulator rotating part. Precision rotary table. Medical devices. Measuring instruments. integrated circuit manufacturing equipment and a wide range of other applications.
The above are the advantages of using crossed roller bearings for industrial robots. Generally speaking, in industrial robot bearings, crossed roller bearings are a very suitable bearing, which can make the joints of industrial robots more flexible, with excellent rotation accuracy and very simple operation. The bearings can withstand large axial and radial loads and can greatly save installation space.
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