Internal mixer grease lubricating structure

The invention discloses an internal mixer grease lubricating structure which comprises a hydraulic cylinder, a pressurizing pump and a distributor. An electromagnetic reversing valve is connected withthe hydraulic cylinder and communicated with a bypass pipeline on an inlet and outlet oil pipe of a locking oil cylinder. The hydraulic cylinder is communicated with a capacity-variable cavity. One end of a piston rod of the hydraulic cylinder is installed in the capacity-variable cavity. The capacity-variable cavity is communicated with the bottom of an oil tank. Lubricating grease is placed inthe oil tank. A spring is arranged at the upper portion of the lubricating grease. The capacity-variable cavity is communicated with the oil inlet end of the pressurizing pump through a check valve. The oil outlet end of the pressurizing pump is communicated with the distributor. The internal mixer grease lubricating structure has the advantages of being simple in structure, convenient to use andcapable of providing the lu