▎ 摘　　要

NOVELTY - The utility model claims a three-section hinge shaft of novel externally embedded lubricating sleeve, wherein the middle shaft lower shaft column is set at the lower end of the middle shaft, the lubricating sleeve graphene set on the upper and lower ports of the middle shaft, the door shaft top shaft is sleeved with graphene lubricating sleeve set at the upper end of the middle shaft, the bottom shaft of the door shaft is sleeved graphene the lubricating sleeve set at 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 top shaft, a middle shaft, door shaft bottom end shaft solves the problem that the existing hinge shaft practical wear rate is high, after using for a long time need to frequently add lubricating oil.