Fire-proof wheel and production technology thereof

Abstract

The invention discloses a fire-proof wheel and a production technology of the fire-proof wheel. The fire-proof wheel comprises a wheel main body and a bearing which are made of metal materials. The wheel main body comprises a retaining ring and a wheel core which is provided with a through hole. One end of the wheel core is provided with a folded side, and the other end of the wheel core is provided with a first limiting step. The retaining ring is fixedly sleeved on the first limiting step. One end of the inner wall of the through hole of the wheel core is provided with a second limiting step, and the other end of the inner wall of the through hole of the wheel core is provided with a certain quantity of riveting points which are distributed in an annular shape. The bearing is fixed between the riveting points and the second limiting step. A Teflon ring is sleeved on the outer surface of the wheel core, and the Teflon ring is located between the retaining ring and the folded side. The fire-proof wheel provided by the invention comprises the wheel core and a baffle which are made of metal materials, so that the fire-proof function of the surface of the wheel is good; compared with the design of the polyurethane ring in the prior art, the Teflon ring is not influenced by high temperature, the use stability is high, and the work performance is good, so that the fire-proof wheel is quite suitable for fire elevator systems.

Description

technical field [0001] The invention relates to a fireproof elevator component, in particular to a fireproof roller and its production process. Background technique [0002] In order to ensure the safety of people's lives and properties when a fire occurs, some high-rise buildings are equipped with fire elevators for people to escape when a fire occurs. Compared with ordinary elevators, due to the particularity of its use environment, fire elevators must have fireproofing functions. [0003] As a conventional part of the elevator system, the roller is a key part of the door opening and closing of the landing door. Naturally, it will also be used in the fire elevator system. At present, the elevator rollers on the market are mainly divided into two types: one is injection-molded nylon rollers, which are widely used in the elevator field due to their hard texture, low production cost and high production efficiency. The friction coefficient of the material is large, it is eas...

AI Technical Summary

Problems solved by technology

At present, the elevator rollers on the market are mainly divided into two types: one is injection-molded nylon rollers, which are widely used in the elevator field due to their hard texture, low production cost and high production efficiency. The friction coefficient of the material is large, it is easy to generate noise, and it does not have the function of fire prevention, so it cannot be used in fire elevators; the other is a wheel frame made of forged material and turned with a polyurethane ring structure roller, its high temperature resistance OK, but the urethane ring wrapped in the roller groove is not fireproof

Therefore, it cannot be used in fire elevators

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