What are the characteristics of the "segmented elastic feed roller" of the single-sided woodworking planer? How to apply?

The axial position of the transmission shaft of the feed roller 1 is fixed, and the elastic element 2 is arranged between the shaft of the feed roller and the outer ring, allowing proper radial movement between the elements 1 and 3, and ensuring that the outer ring 3 can still be driven by the shaft 1 under the condition of not being completely concentric. So that a plurality of wool with large processing allowance can still be fed at the same time. This is especially important for medium and wide planers, which is beneficial to give full play to the working efficiency of machine tools.