Escalator drive sprocket and manufacture method thereof

Abstract

The invention discloses an escalator drive sprocket and a manufacture method thereof. The escalator drive sprocket comprises a wheel spoke and a tooth ring, the tooth ring sleeves the outer side of the wheel spoke, and the wheel spoke is connected and fixed with the tooth ring through intermittent welding. Compared with the drive sprocket in the prior art which is obtained through casting or cutting, and in which the wheel spoke and the tooth ring are connected into one body, the escalator drive sprocket provided by the invention is advantaged in that the wheel spoke and the tooth ring can be made of steel materials in different kinds, and are separately manufactured through an existing relatively-mature technology. According to invention, shrinkage cavity and sand hole defects, of a casting type drive sprocket, caused by integral body casting can be prevented, defects of large machining amount, high cost and the like, of a cutting type drive sprocket, caused by integral body cutting can be prevented, and therefore the escalator drive sprocket is high in product molding ratio, low in cost and low in machining amount.

Description

technical field [0001] The invention relates to the technical field of escalator spare parts, in particular to an escalator drive sprocket and a manufacturing method thereof. Background technique [0002] The sprockets currently used in the field of escalators include cast drive sprockets and plate cutting drive sprockets. The following two types of drive sprockets are analyzed in detail: [0003] see figure 1 , 2 , figure 1 It is a schematic diagram of a drive sprocket blank 10 made by casting the base material, figure 2 The drive sprocket 20 is formed by removing a small amount of material from the drive sprocket blank 10 by cutting. After the driving sprocket blank 10 is formed by casting, the spokes 21 , the ring gear 22 and the pin holes 23 only need to be removed from the sprocket teeth and a small part of the sprocket center. This results in less machining and a lower drive sprocket material removal rate. Therefore, the cost is relatively low, and the driving s...

AI Technical Summary

Problems solved by technology

However, since the drive sprocket 40 is directly processed by cutting the thick steel plate 30, the heavy steel plate 30 itself has a large weight, resulting in a large amount of processing, a high material removal rate, and high manufacturing costs.

Compared with the drive sprocket 20 formed by casting, the drive sprocket 40 obtained by cutting the thick steel plate 30 has relatively fewer internal defects, but still has the defect that the internal structure of the thick steel plate 30 is not dense

Images