Automatic lubricating mechanism for inner ring and outer ring of oil seal

An automatic lubricating mechanism for an inner ring and an outer ring of an oil seal comprises an oil seal tool, a sliding block and an elastic piece, the oil seal tool is provided with a step part, the step part is formed by matching a small-diameter section and a large-diameter section, and an oil inlet pipeline communicated with an external oil pump pipeline is arranged in the oil seal tool. A plurality of inner ring lubricating holes communicated with the oil inlet pipeline are formed in the outer wall of the small-diameter section in a surrounding mode, inner ring lubricating areas are arranged at the positions, corresponding to the inner ring lubricating holes, of the small-diameter section, a plurality of outer ring lubricating holes communicated with the oil inlet pipeline are formed in the outer wall of the large-diameter section in a surrounding mode, and the sliding block is arranged on the outer wall of the large-diameter section of the oil seal tool in a sleeving mode. The sliding block can reci