▎ 摘　　要

NOVELTY - The utility model claims a new-type outer embedded lubricating sleeve of two-section hinge shaft, the middle shaft column is connected with the lower shaft of the door shaft, the graphene circle of the lubricating sleeve is sleeved with the outer circle of the middle shaft column, the inner circle of the upper shaft of the door shaft is sleeved with the outer circle of the lubricating sleeve graphene The utility model has simple structure and convenient operation, through graphene the lubricating sleeve to connect the door shaft upper shaft, middle shaft column, the door shaft lower shaft solves the problem that the existing hinge shaft practical wear rate is high, after using for a long time, it needs to frequently add lubricating oil.