TELESCOPIC MAST DEVICE WITH ROLLING FRICTION OF SCREW-GLOVE DRIVING MECHANISM

摘要

PURPOSE: A telescopic mast device driven by rolling friction using a spiral groove is provided to improve a supporting force between links by inserting a ring to the top of the links. CONSTITUTION: A telescopic mast device driven by rolling friction using a spiral groove comprises top and bottom ring parts(10,30) and a moving part. In the top ring part, a rolling bearing for external contact is projected to the inside of a link to support the exterior of another link(60). In the bottom ring part, a rolling bearing(40) for internal contact is projected to the outside of the link to support the interior of another link. The moving part is composed of a fixing pin fixed in the bottom ring part and a movable roller which moves along the spiral groove of a screw.