Top roller bearing assembling process for loom double rolling way and its special correcting tool

Abstract

The present invention discloses double rolling way roller bearing assembling process and special correcting tool for loom. The assembling process includes matching steel balls, spindle and bearing casing with double rolling way. The tools including back row tool, front row tool, shifting pin, radial interval correcting pin and U-shaped spring clamp are used in the assembling of spindle, bearing casing, back holder, back row of balls, front row of balls, front holder, etc. Using double rolling way bearing to replace single rolling way bearing has the effects of prolonged service life, homogeneous pressure, smooth rotation and raised yarn quality.

Description

technical field [0001] The invention relates to an assembly process of a roller bearing on a double raceway of a textile machine and a special correction tool thereof. Background technique [0002] The upper roller bearing of the textile machine plays the role of drafting and traction of the yarn during the spinning operation. The stability of the bearing operation is directly related to the quality of the drafting and traction of the yarn, which affects the thickness and evenness of the yarn. For high-count yarn The impact on the quality of the bearing is particularly obvious, so there are strict requirements on the manufacturing quality of the top roller bearings. According to the standards issued by the industry ministry, the radial clearance requirements are controlled between 0.003 and 0.03 mm. The traditional top roller bearing has a single raceway structure, that is, the rear row of steel balls is installed between the R round groove of the mandrel and the inner hole ...

AI Technical Summary

Problems solved by technology

The traditional top roller bearing has a single raceway structure, that is, the rear row of steel balls is installed between the R round groove of the mandrel and the inner hole of the bearing shell, and the front row of steel balls is installed between the R round groove of the mandrel and the R round groove of the bearing shell. In the single raceway, the line contact relationship between the rear row of steel balls and the inner hole of the bearing shell is formed, so that the rear row of steel balls run on their own different tracks, resulting in extremely fast wear of the inner hole of the bearing shell and forming a gap, and the service life of the bearing is very short. Frequent replacement requires a large amount of steel investment, which is a fatal blow to yarn quality

The "top roller bearing" of Chinese patent 92213968.7 (the patent was terminated in 1996) proposed a double raceway structure, that is, the front and rear rows of steel balls of the bearing are installed in the R circular groove of the free mandrel and the R circular groove of the bearing shell. In the double raceway composed of grooves, the gap between the rear row of steel balls and the inner hole of the bearing shell is avoided due to the extremely fast wear and tear caused by the line contact, which greatly prolongs the life of the bearing and greatly improves the quality of the yarn. However, the double raceway structure The problem of steel ball assembly has not been solved, and there is no suitable special tool, especially the difficulty of assembling the rear row of steel balls is well known, so that the traditional single-raceway bearings are still used in the market, so that the double-raceway It is a pity that the bearing can not be popularized and applied in the cradle

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