Double-row ball bearing

Abstract

A double row ball bearing belongs to the technical field of rolling contact bearings, including an outer ring, an inner ring, a cage, and balls; the outer ring is sleeved outside the inner ring; the cage and balls are located between the outer ring and the inner ring, and The balls are embedded in the cage, the outer ring is hollow cylindrical, two parallel raceways are set on the inner wall of the outer ring, and an oil inlet channel is radially opened in the middle of the inner wall of the outer ring; the two raceways are symmetrically arranged in the oil inlet channel On both sides; the oil inlet channel includes a small oil inlet hole and a large oil inlet hole arranged coaxially and communicated with each other. The present invention replaces the concave ring in the original structure by setting large oil inlet holes to prevent metal powder and other foreign matter from staying in the concave ring. At the same time, it increases the extrusion surface of lubricating oil and ensures sufficient lubrication of the balls. In addition, a step is provided to facilitate the discharge of lubricating oil containing metal powder, thereby prolonging the service life of the bearing.

Description

technical field [0001] The invention belongs to the technical field of rolling contact bearings, in particular to double-row ball bearings. Background technique [0002] The bearing is the supporting part in the mechanical transmission mechanism, which is used to determine the relative movement position of the rotating shaft and other parts. Its quality directly affects the working performance of the mechanical machine, and the movement of the relevant mechanism is driven by the operation of the bearing. At present, double row ball bearings are lubricated with grease, and a concave ring is formed on the inner peripheral surface of the outer ring. Although the arrangement of the dimpled ring facilitates the wetting of the balls and exerts a lubricating effect, foreign matter such as metal powder contained in the lubricating oil remains in the dimpled ring. This foreign matter is bitten when the bearing is rotated, thereby reducing the service life of the double row bearing. ...

AI Technical Summary

Problems solved by technology

The setting of the recessed ring is beneficial to the infiltration of the balls and has a lubricating effect, but foreign matter such as metal powder contained in the lubricating oil stays in the recessed ring

Engages this foreign matter when rotating the bearing, reducing the service life of the double row bearing

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