Main transmission arc-shaped gear lubricating structure for four-roll cold rolling mill

The invention discloses a main transmission arc-shaped gear lubricating structure for a four-roll cold rolling mill. The structure comprises a current-voltage characteristic (CVC) channeling gear sleeve and an oil supply device, wherein the CVC channeling gear sleeve is provided with an oil inlet pipeline leading to the cavity of the CVC channeling gear sleeve; one end of the oil inlet pipeline is an oil inlet which is the same as the outside; one end of the oil supply device is sleeved on the CVC channeling gear sleeve and is sleeved on the oil inlet through a rotary oil seal, and the other end of the oil supply device is fixed on a transmission shaft of the cold rolling mill through a screw; and the oil supply device is provided with an oil supply hole. A lubricating oil path of an arc-shaped tooth and a CVC channeling gear sleeve lubricating pipeline are cut off through a transmission shaft, and then another oil path is connected from a main transmission gear box of the rolling mill to forcibly inject oil