▎ 摘　　要

NOVELTY - The utility model claims a three-section hinge shaft equipped with new lubricating sleeve, the middle shaft upper shaft column is embedded on the upper end of the middle shaft, the middle shaft lower shaft column is set at the lower end of the middle shaft, the middle shaft upper shaft column, the lower shaft column sleeve of the middle shaft is provided with graphene lubricating sleeve, the upper shaft of the door shaft is sleeved graphene the lubricating sleeve sleeved on the upper shaft column of the middle shaft, the lower shaft of the door shaft is sleeved with graphene lubricating sleeve sleeved on the lower shaft column of the middle shaft. The utility model has simple structure and convenient operation, through graphene the lubricating sleeve to connect the door shaft upper shaft, middle shaft upper shaft column, a middle shaft, a middle shaft lower shaft column, the door shaft lower shaft solves the problem that the existing hinge shaft lacks a connecting sleeve piece without adding lubricating oil low friction resistance.