The invention discloses a change gear in an elevator landing door system. The section of a metal rolling wheel framework is in a T shape, and is of a hollow structure. A limiting check ring extending in the radial direction of a through hole is arranged on the opening edge of the through hole, in the same side with a transverse part, of a longitudinal part, and a first arc-shaped annular groove is formed in the inner hole wall of the through hole. A metal shaft sleeve is arranged in the through hole, and a second arc-shaped annular groove corresponding to the first arc-shaped annular groove is formed in the outer surface of the metal shaft sleeve. Balls are annularly distributed in a chamber formed by the first arc-shaped annular groove and the second arc-shaped annular groove. A non-metal outer ring is connected to the longitudinal part of the metal rolling wheel framework in a sleeving manner, and an arc-shaped protrusion is annularly distributed on the outer surface of the peripheral ring of the non-metal outer ring. At least one protruding rib is annularly arranged on the arc top face of the arc-shaped protrusion, the longitudinal part of the metal rolling wheel framework is further sleeved with a metal backup shoe, and the metal backup shoe is connected to the end face of the longitudinal part in a fastened manner. The technical aim of reducing the production cost of the change gear in the elevator landing door system is achieved, and the production cost is low.
Change gear in elevator landing door system
2016-01-27
Patent
Electronic Resource
English
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