Four-point contact ball bearing

Abstract

The invention discloses a four-point contact ball bearing. The four-point contact ball bearing comprises a bearing inner ring, rolling balls and a bearing outer ring; the rolling balls are arranged between the bearing inner ring and the bearing outer ring; the bearing inner ring and the bearing outer ring are provided with an annular raceway respectively; each annular raceway and each rolling ball are contacted at two points; an included angle B between connecting lines of two contact points and the center of the rolling balls is between 30 and 120 degrees; as two contact points are between each of the annular raceways of the bearing inner ring and the bearing outer ring and each rolling ball, and the included angle B between the two contact points is between 30 and 120 degrees, radial force stressed by each contact point of each rolling ball is smaller than the radial force stressed by a rolling ball of a conventional ball bearing when the bearing is stressed by the equal load; the bearing can also bear the axial force; and as gaps are formed between the rolling balls and the annular raceways, lube or grease lubricant is convenient to store, the lubricating condition of the rolling balls is improved, and the service life of the bearing can be improved.

Description

technical field [0001] The invention relates to a bearing, in particular to a ball bearing. Background technique [0002] The ball bearings commonly used at present include bearing inner ring, balls and bearing outer ring. The cross-sectional shape of the shaft is an arc, and the radius of the arc is greater than the radius of the ball. The ball shaft of this structure can only bear radial loads, but cannot bear axial loads, and each ball is connected to the outer ring of the bearing and the inner ring of the bearing. There is only one contact point respectively, and the radial bearing capacity of the bearing is also limited to a certain extent. When the geometric size of the bearing is limited and the bearing load is greater than the limit load of the existing ball bearing, the service life of the bearing with this structure will be greatly improved. reduce. In many special equipments with special requirements, the bearings are required to have small geometric dimensions ...

AI Technical Summary

Problems solved by technology

[0002] The ball bearings commonly used at present include bearing inner ring, balls and bearing outer ring. The ball is arranged between the bearing inner ring and the bearing outer ring. The cross-sectional shape of the ball is an arc, and the radius of the arc is greater than the radius of the ball. The ball shaft of this structure can only bear radial loads, but cannot bear axial loads, and each ball is connected to the outer ring of the bearing and the inner ring of the bearing. There is only one contact point respectively, and the radial bearing capacity of the bearing is also limited to a certain extent. When the geometric size of the bearing is limited and the bearing load is greater than the limit load of the existing ball bearing, the service life of the bearing with this structure will be greatly improved. reduce

In many special equipment with special requirements, it means that the geometric size of the bearing is small and the load capacity is large, so the existing ball bearings cannot meet the requirements of the above equipment.

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