In the field of robotics, bearings are the core basic components that ensure precise movement, stable transmission, and efficient operation of mechanical structures. The key movements of robots, such as joint rotation, arm extension and contraction, and end effector operation, all rely on bearings to achieve low friction, high rigidity, and high-precision support and guidance. The following provides a detailed explanation of the core application scenarios, bearing type selection, and technical requirements of robots:
1、 The core requirement of robots for bearings
The working environment and motion characteristics of robots (such as high-precision repetitive positioning, high-speed rotation, complex loads, lightweight requirements, etc.) impose far more stringent requirements on bearings than traditional industrial equipment:
High precision: The repeated positioning accuracy of industrial robots needs to be within ± 0.02mm, and the radial/axial clearance and rotation accuracy (such as eccentricity) of bearings directly affect the motion control accuracy;
High rigidity: The robotic arm needs to resist deformation when carrying workpieces, and the bearings need to provide sufficient radial and axial rigidity to avoid end position displacement caused by loads;
Low friction and long lifespan: Robot joints require high-frequency start stop and forward/reverse rotation, and the friction coefficient of bearings needs to be extremely low (reducing energy consumption and heat generation), while maintaining a stable lifespan under long-term high loads (usually requiring tens of thousands of hours without failure);
Lightweight and compact: Collaborative robots, mobile robots, etc. are sensitive to their own weight, and bearings need to achieve high load-bearing capacity in limited spaces to promote structural miniaturization;
Impact resistance and stability: Service robots and special robots may face road bumps or external collisions, and bearings need to withstand impact loads and maintain motion accuracy.