A spindle unit structure of a vertical lathe

Abstract

The invention discloses a vertical type lathe main shaft unit structure which comprises a main shaft, a sleeve, a front bearing group, a rear bearing group, a belt wheel and a rotating oil cylinder, wherein the sleeve is annularly arranged at the periphery of the main shaft in a sleeving manner; the front bearing group is arranged between the upper end of the sleeve and the main shaft in a sleeving manner; the rear bearing group is arranged between the lower end of the sleeve and the main shaft in a sleeving manner; the belt wheel is combined with the lower end of the main shaft; the belt wheel is of a hollow structure; the rotating oil cylinder is located in the hollow structure; and the vertical type lathe main shaft unit structure is convenient to assemble and maintain, and is compact.

Description

technical field [0001] The invention relates to a spindle unit structure of a vertical lathe. Background technique [0002] The sleeve is matched with the upper and lower ends of the base casting, so the processing accuracy is high. It is difficult to ensure the dimensional accuracy of the upper and lower journals and the coaxial requirements of the upper and lower journals. In addition, the traditional sleeve The lower end of the cylinder needs a shoulder to fix the outer ring of the rear bearing, and the sleeve needs to be turned around and boring during processing, which makes it more difficult to ensure the coaxial requirements of the front and rear holes; at the same time, it is difficult to assemble the spindle unit of the traditional structure, because at the same time, it is necessary to ensure the upper and lower To match the two journals with the base casting, in actual operation, the method of distributing the lower journals is often used, which is time-consuming ...

AI Technical Summary

Problems solved by technology

[0002] The sleeve is matched with the upper and lower ends of the base casting, so the processing accuracy is high. It is difficult to ensure the dimensional accuracy of the upper and lower journals and the coaxial requirements of the upper and lower journals. In addition, the traditional sleeve The lower end of the cylinder needs a shoulder to fix the outer ring of the rear bearing, and the sleeve needs to be turned around and boring during processing, which makes it more difficult to ensure the coaxial requirements of the front and rear holes; at the same time, it is difficult to assemble the spindle unit of the traditional structure, because at the same time, it is necessary to ensure the upper and lower The matching of the two journals with the base casting is often done in the actual operation of the lower journal with the car, which is time-consuming and labor-intensive. If there is an excessive car matching, the sleeve will be scrapped

[0003] The connection between the pulley and the main shaft is generally in the form of a radial flat key connection. Opening a keyway in the radial direction of the main shaft will affect the strength of the main shaft and will have a greater impact on the dynamic balance of the main shaft; in addition, the radial key connection The method requires sufficient connection length between the main shaft and the pulley, so the main shaft must be lengthened, resulting in a large structural size of the entire main shaft unit, and lengthening the main shaft will also affect the machining accuracy of the main shaft

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