Shaping drum for tyre shaping machine

Abstract

The invention provides the forming drum of a tyre forming machine, comprising a wide / narrow expansion mechanism and a wide / narrow tile drum shoulder expansion mechanism embedded on a hollow mainshaft and driven by a screw mandrel. The invention is characterized in that the narrow drum shoulder expansion mechanism is provided with a gas cylinder; under the action of the gas cylinder, the drum shoulder is automatically expanded in place. Driven by the screw mandrel, the movable cirque plates in the wide / narrow tile expansion mechanism embedded on the hollow mainshaft are subject to the action of a spring; the asynchronous expansion with the sequence of wide tile and narrow tile is implemented by a connecting rod in the wide / narrow tile expansion mechanism, thus reaching required diameters. By adopting the type of pneumatic expansion forming drum shoulder, the invention solves the localization that the expansion radius and the retraction radius of the traditional forming drum with drum shoulder can not be high enough, thus leading the forming drum to reach the contraction diameter low enough when contracted and reach the process requirement of enough high diameter when expanded, simplifies the production process, and reduces the labor intensity of workers.

Description

(1) Technical field: [0001] The invention relates to a building drum on a tire building machine. (two) background technology: [0002] At present, the building drum with drum shoulders used on tire building machines, such as the tire building machine building drum with patent No. 200620083428.8, is the most representative. The building drum includes inner and outer tile shrinking mechanisms, which are embedded in the hollow On the main shaft, driven by the screw nut transmission pair in the hollow main shaft, the inner and outer tile shrinkage mechanisms are sequentially expanded and contracted, so that the inner and outer tiles expand to the largest diameter and shrink to the smallest diameter asynchronously in the radial direction, so as to meet the requirements of the process. Require. At the same time, the inner and outer tile retraction mechanisms also include the inner and outer tile drum shoulder telescopic devices linked with the inner and outer tile retraction mech...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned tire building machine building drum is suitable for the production of small and medium-sized tires. Due to the development of the industry, tires are getting bigger and bigger, such as engineering tires, giant tires, etc. The tire building machine building drum with the above structure is stable due to axial and radial forces. Insufficient performance, inner and outer tile drum shoulder shrinkage cannot be adjusted, etc., it is necessary to design a new type of building drum to meet the production requirements of engineering tires, giant tires, etc.

Images