Feeding roller structure

A feeding roller structure, comprising:

• a fastening frame, two sides of the fastening frame having a first side frame and a second side frame, the first side frame being opposite to the second side frame;
• a transmission component assembled in the fastening frame for transmitting power, the transmission component including a drive shaft mounted on the two sides of the fastening frame;
• a transmission roller concentrically arranged around the drive shaft;
• and
• a floating coupler mounted to the fastening frame, the floating coupler being coupled between the drive shaft and the transmission roller, the floating coupler including a floating shaft, and a hub concentrically covered on an outside of the floating shaft, two gaps being provided at two opposite ends of the hub, one gap being formed between one end of the hub of the floating coupler and the first side frame, and the other gap being formed between the other end of the hub of the floating coupler and the second side frame, the hub being loosely cooperated with the floating shaft to compensate for an angular displacement between a rotation axis of the hub and a rotation axis of the floating shaft.

A feeding roller structure, comprising:

• a fastening frame;
• a drive shaft mounted on two sides of the fastening frame;
• a transmission roller concentrically arranged around the drive shaft;
• and
• a floating coupler mounted to the fastening frame, the floating coupler being coupled between the drive shaft and the transmission roller, two opposite ends of the floating coupler being adjacent to and spaced from the two sides of the fastening frame to form two gaps, the two gaps limiting an angular displacement of the floating coupler, the floating coupler including a floating shaft, and a hub concentrically covered on an outside of the floating shaft, the floating shaft having at least two outer transmission teeth disposed on an outer periphery surface of the floating shaft, the hub having at least two inner transmission teeth arranged on an inner periphery surface of the hub, when the floating shaft is assembled in the hub, the at least two inner transmission teeth being corresponding to and being engaged with the at least two outer transmission teeth, profiles of the at least two outer transmission teeth of the outer periphery surface of the floating shaft being matched with profiles of the at least two inner transmission teeth of the inner periphery surface of the hub, an interstice being formed between the outer periphery surface of the floating shaft and the inner periphery surface of the hub so as to make a loose engagement between the floating shaft and the hub.