Do you really know the bearings used in industrial robots?

As one of the key accessories of industrial robots, industrial robot bearings are most suitable for the joints or rotating parts of industrial robots, the rotating table of machining centers, the rotating part of manipulators, precision rotating tables, medical instruments, measuring instruments, and IC manufacturing. device etc.

Industrial robot bearing characteristics

1.It can withstand comprehensive loads in axial, radial and overturning directions;

2. Thin-walled bearings;

3. High rotary positioning accuracy.

Classification of industrial robot bearings

It mainly includes two types of bearings for industrial robots, one is equal-section thin-walled bearings, and the other is cross-roller bearings. In addition, there are harmonic reducer bearings, linear bearings, joint bearings, etc., but mainly equal-section thin-walled bearings and crossed roller bearings are used more.

Crossed Roller Bearings

Crossed roller bearings are cylindrical rollers or tapered rollers arranged vertically on the 90-degree V-shaped groove rolling surface through spacers, so crossed roller bearings can withstand radial loads, axial loads and moments Loads and other multi-directional loads. The size of the inner and outer rings is miniaturized, and the extremely thin form is even closer to the limit of small size, and has high rigidity, and the precision can reach P5, P4, and P2 levels. Therefore, it is suitable for joints and rotating parts of industrial robots, rotating tables of machining centers, precision rotating tables, medical equipment, calculators, military industry, IC manufacturing equipment and other equipment.

Features of crossed roller bearings:

1. Excellent rotation accuracy

The internal structure of the crossed roller bearing adopts rollers arranged vertically and intersecting each other at 90°. There are spacers or spacers between the rollers, which can prevent the rollers from tilting or rubbing against each other, and effectively prevent the rotation torque. Increase. In addition, there will be no one-sided contact phenomenon or locking of the rollers; at the same time, because the inner and outer rings are divided, the gap can be adjusted, and high-precision rotary 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 cages are installed, so the installation operation is very simple.

3. Bear large axial and radial loads

Because the rollers are vertically arranged on the 90° V-groove rolling surface through the spacer, this design enables the crossed roller bearing to withstand large radial loads, axial loads and moment loads, etc. direction load.

4. Significantly save installation space

The size of the inner and outer rings of the crossed roller bearing is minimized, especially the ultra-thin structure is a small size close to the limit, and has high rigidity, so it is most suitable for the joints or rotating parts of industrial robots, and the rotation of machining centers It can be used in a wide range of applications such as worktables, manipulator rotating parts, precision rotary tables, medical instruments, measuring instruments, and IC manufacturing equipment.

RV reducer, also known as precision joint reducer, is widely used in industrial robots due to its small size, strong impact resistance, large torque, and high positioning accuracy. For the RV reducer, the shape structure and precise positioning of the bearing are the key factors such as its compact structure, excellent rigidity, and precise transmission. The RV reducer bearings include a variety of thin-walled bearing series and cylindrical roller cage assembly series.

Harmonic reducer is a kind of controllable elastic deformation of the flexible wheel by means of a wave generator, and uses the controllable elastic deformation of the flexible bearing to transmit motion and power. It is characterized by compact structure, high motion precision, large transmission ratio, and multi-purpose For robot joints with small and medium torques.

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