Differential mechanism

The utility model provides a differential mechanism and relates to the field of vehicle manufacturing, the differential mechanism comprises a differential shell and a transmission gear assembly, the differential shell is provided with two assembling inner holes used for allowing two half shafts to penetrate through correspondingly, and at least two spiral oil guide grooves are formed in the hole wall of at least one of the two assembling inner holes; each spiral oil guide groove is used for guiding lubricating oil in the gearbox into the differential shell; the transmission gear assembly is arranged in the differential shell. The differential shell is provided with an oil guide protrusion on the outer end face of the assembly inner hole, and the oil guide protrusion is used for blocking lubricating oil and guiding the lubricating oil into the spiral oil guide groove. According to the structural design of the differential mechanism, the lubricating flow field in the differential mechanism can be optimized, the