Axially Movable Sprocket Transmission for Lower Alignment Cost

The patent makes the drive sprocket movable in the axial direction rather than fixed, allowing it to dynamically adjust its position to accommodate variations in driven sprocket positioning. This dynamic capability eliminates the need for high-precision axial positioning of both sprockets, thereby reducing manufacturing costs while maintaining power transmission performance.

The patent changes the parameter of axial positioning accuracy from a fixed high-precision requirement to a variable range that can accommodate standard manufacturing tolerances. By allowing the drive sprocket to move axially within a certain range, the system can compensate for positioning variations without requiring expensive high-precision manufacturing.

The patent introduces a movement restriction structure as an intermediary element that mediates between the drive sprocket and the fixed mounting position. This intermediary structure allows controlled axial movement within acceptable tolerances while preventing excessive displacement, thereby relaxing positioning requirements without significantly increasing overall system complexity.

The movement restriction structure is designed to automatically limit the drive sprocket's axial movement to within acceptable ranges without requiring external control mechanisms. The structure itself provides the necessary constraints, eliminating the need for additional complex control systems while maintaining relaxed positioning tolerances.