The invention provides a floatable driving plate and grain pulling chain combined roller plate type
corncob breaking-off mechanism, relates to a
corncob picking device installed on a corn harvesting
machine and belongs to the technical field of corn harvesting machinery. The floatable driving plate and grain pulling chain combined roller plate type
corncob breaking-off mechanism comprises a transmission gear, a box body, corncob blocking plates,
short stem-pulling delivery rollers, universal joints, driving plates, worms and gears, long stem-pulling delivery rollers, floating rods and grain pulling chains and is characterized in that the floatable driving plate and grain pulling chain combined roller plate type corncob breaking-off mechanism comprises a pair of long stem-pulling delivery rollers, a pair of the
short stem-pulling delivery rollers and a pair of corncob blocking plates arranged under the delivery rollers, the driving plates are respectively located at the front ends of the long stem-pulling delivery rollers and the front ends of the
short stem-pulling delivery rollers and are connected and driven by using the worms and gears, the grain pulling chains are located under the driving plates and are connected with the universal joints through the floating rods, the driving plates and the grain pulling chains guide corn plants to be accurately fed the position between the two stem-pulling delivery rollers through the combined clamping effect.