Spindle bearing of CT (Computed Tomography) machine

Abstract

The invention discloses a spindle bearing of a CT (Computed Tomography) machine, which comprises an outer ring (1), an inner ring (4), a second inner ring (8), a steel ball (3) and a retainer (7). A structure that a combined inner ring and the outer ring are provided with teeth or are not provided with the teeth is formed by the inner ring and the second inner ring, and the steel ball and the retainer are arranged between the combined inner ring and the outer ring; or a structure that a combined outer ring and the inner ring are provided with teeth or are not provided with the teeth is formed, and the steel ball and the retainer are arranged between the combined outer ring and the inner ring. The problems of high processing difficulty, complex structure and high production cost of the existing wire raceway bearing and thin-wall uniform-section bearing are solved. Under the condition with the same appearance size, an embedded structure is changed into an integrated structure, so that the aims of simplifying a machining process, reducing the production cost, prolonging the service life and improving the reliability are fulfilled.

Description

technical field [0001] The invention belongs to a double-row angular contact ball turntable bearing, and mainly relates to a CT machine main shaft bearing. Widely used in various medical or industrial uses. Background technique [0002] Four-point contact ball slewing bearings are widely used in low-speed CT machines due to their mature and reliable technology and low cost. However, it cannot meet the high speed, low noise, high precision, low vibration, and long life requirements of high-speed CT machines. The main reasons are: 1. The bearing load of high-speed CT machines is greater, especially The overturning moment is large. 2. Under the action of the overturning moment, the steel ball and cage assembly of the four-point contact ball slewing bearing will enter and exit the load area with the opposite force direction twice during the one-rotation movement process, which will greatly disturb the cage. At present, the high-speed models used in medical or industrial CT ma...

AI Technical Summary

Problems solved by technology

It solves the problems of difficult processing, complex structure and high production cost existing in the existing steel wire raceway bearings and thin-wall bearings with equal cross-sections. Under the same external dimension conditions, the mosaic structure is changed to a monolithic structure to simplify the processing technology, The purpose of reducing production costs, prolonging service life, and improving reliability

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