Planetary Gear Structure With Overlapping Belt Paths to Cut Axial Length

The patent transitions from a two-dimensional offset arrangement of toothed belts to a three-dimensional overlapping arrangement. By allowing the winding transmission bodies to overlap in the axial direction when viewed from a direction orthogonal to the axial direction, the design utilizes the third dimension to reduce the overall axial length while maintaining the necessary functional separation through the overlapping configuration.

The patent implements a nested arrangement where the winding transmission bodies of multiple planetary units are positioned to overlap with each other in the axial direction. This nesting approach allows multiple transmission elements to occupy the same axial space, significantly reducing the total axial length of the planetary transmission while preserving the functional independence of each toothed belt path.

The patent merges multiple winding transmission bodies into a compact overlapping arrangement in the axial direction. By combining the spatial occupation of multiple toothed belts into an overlapping configuration rather than a sequential offset arrangement, the design accommodates an increased number of planetary gears and toothed belts without proportionally increasing the axial length.

The patent utilizes the axial dimension for overlapping arrangements to accommodate multiple planetary units. This dimensional strategy allows the transmission to provide more gear ratios and functions by increasing the number of planetary gears while keeping the axial length controlled through the overlapping configuration of winding transmission bodies.