Introduction of Industrial Robot Bearings
Industrial robot bearings are one of the key supporting parts of industrial robots. They mainly include two major categories: one is thin-walled bearings with equal cross-section, and the other is crossed cylindrical roller bearings. In addition, there are harmonic reducer bearings, linear bearings, joint bearings, etc., but mainly the first two bearings.(HONBbearing02)
Industrial robot bearing features:
1. Can withstand comprehensive loads such as axial, radial, and overturning loads
2. Thin-walled bearings
3. High rotation positioning accuracy
1. Can withstand comprehensive loads such as axial, radial, and overturning loads
2. Thin-walled bearings
3. High rotation positioning accuracy
The key technology of industrial robot bearings
The development of modern industrial robots tends to be lighter. For bearings to be installed in a limited space, they must be small and light, that is, lightweight. But at the same time, the high load, high rotation accuracy, high running stability, high positioning speed, high repeated positioning accuracy, long life and high reliability of the robot require that the supporting robot bearings must have high load capacity, high precision and high Stiffness, low friction torque, long life, high reliability performance. Lightweight and high performance are a contradiction.
The development of modern industrial robots tends to be lighter. For bearings to be installed in a limited space, they must be small and light, that is, lightweight. But at the same time, the high load, high rotation accuracy, high running stability, high positioning speed, high repeated positioning accuracy, long life and high reliability of the robot require that the supporting robot bearings must have high load capacity, high precision and high Stiffness, low friction torque, long life, high reliability performance. Lightweight and high performance are a contradiction.
The internal structure of the thin-walled cross-cylinder roller bearing adopts rollers arranged at 90 ° to cross each other perpendicularly. A single bearing can simultaneously bear the combined action of radial force, bidirectional axial force and overturning moment. There is a spacer between rollers Or the isolation block can prevent the tilt of the rollers or mutual grinding between the rollers, which effectively prevents the increase of friction torque. In addition, the vertical cross arrangement of the rollers can avoid the locking phenomenon of the rollers; at the same time, because the inner and outer rings of the bearing are divided structures, the gap is adjustable, and even if pressure is applied, high rotation accuracy can be obtained. Crossed roller bearings are widely used in industrial robots for waist rotation, articulated robot shoulders, arms, wrists and other rotating parts due to their light composite structure, high rotation accuracy, good rigidity and stable friction torque.
Harmonic reducer is a kind of controlled elastic deformation of flexible wheel by wave generator. It uses flexible elastic deformation of flexible bearing to transmit motion and power. It is characterized by compact structure, high motion accuracy, large transmission ratio, and multi-purpose. For small and medium torque robot joints.
Harmonic reducer bearings can be divided into two categories: CSF / CSG series harmonic reducer bearings with split outer ring and integral inner ring, and SHF / SHG series harmonic reducer bearings with integral inner and outer ring according to the application.
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