Robot Joint Structure for Dust Sealing and Liquid Drainage

The inner surface is segmented into multiple regions with different slopes, creating distinct functional zones: a first sloped region for liquid discharge and a second region for structural support. This segmentation allows the narrow joint gap to maintain protection while the sloped region provides liquid discharge pathways.

The solution transitions from a two-dimensional flat surface to a three-dimensional sloped surface. By introducing a slope dimension to the inner surface, liquid can be directed toward the joint gap and discharged externally, resolving the contradiction between narrow gap protection and liquid discharge capability.

The inner surface is designed with a curved sloped geometry rather than a flat surface. This curvature facilitates liquid flow by creating a natural drainage path toward the joint gap, enabling effective liquid discharge while maintaining the narrow gap structure for contamination protection.

The narrow joint gap, which initially appears to be a harmful factor by trapping liquids, is converted into a beneficial discharge pathway. The sloped inner surface directs liquid toward the joint gap, transforming the potential harm of liquid accumulation into a functional liquid discharge mechanism.

Different regions of the inner surface are assigned different qualities: the first sloped region has a slope optimized for liquid discharge, while the second region maintains the narrow gap structure for dust prevention. This local differentiation resolves the contradiction between dust protection and liquid discharge.

The sloped inner surface is designed in advance to preemptively channel liquid toward the joint gap before accumulation can occur. This preliminary action prevents liquid buildup by continuously directing it toward the discharge pathway, addressing the corrosion risk before it materializes.