Sealing device for main shaft of numerical control machine tool

Abstract

The invention relates to a sealing device for a main shaft of a numerical control machine tool. The sealing device is assembled on the main shaft of the numerical control machine tool and comprises at least one sealing ring, a gasket and a sealing ring bracket, wherein the sealing ring and the gasket are tightly contacted with each other and rigidly matched in an inner ring of an end part supporting bearing of the main shaft of the numerical control machine tool; one side end face of the sealing ring is flush with the end face of the bearing; the sealing ring bracket is contacted with the end face of the sealing ring and the end face of the bearing; and the main shaft of the numerical control machine tool passes through and is tightly matched with the sealing ring, the gasket and the sealing ring bracket. Lubricating oil in a main shaft box can be prevented from leaking along the main shaft and external impurities, such as dust, coolant, metal filings and the like are prevented from entering the main shaft box and affecting the processing accuracy of the main shaft, so that the workpiece processing accuracy is improved and the service life of the main shaft is prolonged.

Description

technical field [0001] The invention relates to a sealing device, in particular to a sealing device for a spindle of a numerically controlled machine tool, which is assembled on the spindle of a numerically controlled machine tool. Background technique [0002] During the operation of CNC machine tools, with the rapid rotation of the spindle, oil seals are often used to prevent the lubricating oil in the spindle box from leaking out. The use of oil seals can not only prevent oil leakage, but also prevent foreign dust, coolant and other impurities from entering the spindle box. But used oil seal is all fixed on the end cover of the bearing one end of supporting main shaft at present, and main shaft rotates and oil seal does not rotate. Such a structure is not ideal. With the rotation of the main shaft, there will be friction between the main shaft and the oil seal. If the friction time is too long, the main shaft will not only heat up, but also there will be a gap between th...

AI Technical Summary

Problems solved by technology

Such a structure is not ideal. With the rotation of the main shaft, there will be friction between the main shaft and the oil seal. If the friction time is too long, the main shaft will not only heat up, but also there will be a gap between the two, and the main shaft will jump and affect In addition, the life of the spindle will also be reduced; and impurities such as metal shavings and coolant from the workpiece will enter the spindle box, which will also affect the rotation accuracy of the spindle.

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