Planetary rolling bearing

Abstract

A planetary rolling bearing. A bearing main body comprises an inner ring, an outer ring, a ball track, main rollers and auxiliary rollers. The inner ring and the outer ring are sleeved together in a way of coincided central axes; the outer side of the inner ring and the inner side of the outer ring form the ball track; rollers in the ball track comprise a main roller group and an auxiliary roller group; the rollers are arranged in a planetary shape, namely axes of every three rollers form an isosceles triangle in the ball track; and each roller body is tangent to another along an axis direction, as well as tangent to the ball track wall. When the bearing works, only rolling friction exists between the main rollers and the auxiliary rollers, and between the main rollers, the auxiliary rollers and the outer ring and the inner ring; and original sliding friction and collision friction between the rollers and a holder do not exist. Compared with the prior art, the invention has beneficial effect that the holder is cancelled to reduce collision friction between the holder and the rollers, effectively reduce high temperature of the bearing and oil loss time, thereby prolonging the service life of the bearing.

Description

technical field [0001] The invention relates to a bearing, in particular to a planetary rolling bearing which is automatically limited by arranging auxiliary rollers in a planetary shape. Background technique [0002] Rolling bearings have two structures with and without cages. Large-scale bearings are generally required to bear a large load, often without a cage, and the inner and outer raceways are filled with rolling elements, which makes it easy for the rolling elements to generate mutual contact friction, which greatly increases the friction of the bearing at high temperature. result in shortened working life. Most of the small and medium-sized rolling bearings are equipped with a cage. The main function of the cage is that the cage separates the rolling elements at equal distances and is evenly distributed on the circumference of the raceway to prevent the rolling elements from directly colliding and rubbing against each other during work. Keep friction and heat at a...

AI Technical Summary

Problems solved by technology

So cages are important in rolling bearings, but cages are mechanically stressed by friction, strain and inertial forces, they may also be chemically affected by certain lubricants, lubricant additives or their aging products, organic solvents or coolants Damage caused by the action causes the bearing to end its service life

[0003] In the actual work of rolling bearings, due to high-speed rotation, there is sliding friction between all rolling elements, rolling elements, cages, and outer rings, which causes high temperature oil loss, resulting in bearing bundle damage

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