Oil passing disc of hydraulic motor

An oil passing disc of a hydraulic motor comprises an oil passing disc body, a first oil channel, a second oil channel and an inner cavity used for installing an oil distribution disc are arranged in the body, one end opening of the first oil channel and one end opening of the second oil channel are communicated with the inner cavity, and the other end opening of the first oil channel and the other end opening of the second oil channel are exposed out of the surface of the body to form a first oil opening and a second oil opening. The first oil port and the second oil port are located on the end face of the main body, and the first oil duct is distributed adjacent to the center of the main body. After the structure is adopted, the external oil pipe can be arranged along the crankshaft direction of the hydraulic motor and can be smoothly connected with the first oil port and the second oil port without turning to the side surface of the oil passing disc, so that the connection between the first oil port and th