Thin Section Bearings : The Precision Transmission Core of Humanoid Robot Motion Systems
In humanoid robot design, constant cross-section thin-walled bearings have been deeply integrated into critical nodes of bionic motion systems due to their unique structural advantages. Through continuous technological iteration, Luoyang BOBI Precision Bearing Co., Ltd. has precisely controlled the cross-sectional thickness of these bearings within the range of 4.725–25.4 mm and adopted silicon nitride ceramic balls and PEEK retainers tailored to client requirements, providing customized solutions for robotic motion units.
Multi-Joint Precision Transmission Systems
Shoulder Joint 3D Motion Module
In spherical shoulder joint structures, constant cross-section thin-walled bearings enable composite motion with ±120° pitch angles and 360° horizontal rotation. They maintain extreme motion accuracy under significant axial loads, ensuring minimal trajectory control errors during robotic arm grasping operations.
Finger Joint Micro-Drive Unit
Luoyang BOBI Precision Bearing Co., Ltd. has developed C-shaped thin section bearings for constrained spaces of metacarpophalangeal joints. Their compact design allows the integration of multiple pressure-sensing contact points. Vapor-deposited molybdenum disulfide solid lubrication technology enhances these bearings in high-frequency flexion-extension cycles, significantly extending service life.
Load Optimization for Core Motion Mechanisms
Hip Rotation Drive System
Using multiple series-connected constant cross-section thin-walled bearings to construct torque transmission modules, combined with preload self-adjustment mechanisms, bipedal robots achieve high-speed sprinting under specific self-weight conditions. Specially designed contact angles enable simultaneous radial and axial load-bearing, delivering exceptional shock load capacity.
Ankle Dynamic Balance Module
In ankle mechanisms, thin-walled bearings and six-axis force sensors form a closed-loop control system, achieving millisecond-level responses to ground reaction forces. This ensures stable center-of-gravity control during single-leg standing.
Innovative Integration of Perception-Motion Fusion Systems
Neck Vision Gimbal System
Within the dual-axis head stabilization platform, embedded thin-walled bearings integrate fiber-optic strain sensing networks for real-time mechanical vibration monitoring. Paired with active damping control systems, the imaging module jitter is significantly reduced.
Bionic Spine Flexible Transmission Chain
A modular spinal structure built from multiple micro thin-walled bearings grants each motion unit deflection capability. Advanced surface treatment processes maintain ultra-low friction coefficients, providing reliable support for the flexible transmission of bionic spines.
Luoyang BOBI Precision Bearing Co., Ltd. has developed a specialized bearing system covering multiple series by establishing a robotic motion database. The latest product series demonstrates significant improvements in limiting speed, vibration noise, and other key metrics, laying the foundation for breakthroughs in humanoid robot motion performance. These rigorously tested precision components are driving iterative advancements in bionic motion technology across global robotics R&D centers.
