Roller bearing

Abstract

The invention relates to a roller bearing. The roller bearing is characterized by comprising an outer ring, an inner ring, a grease groove, a rolling body and a retainer, wherein the rolling body is arranged in a channel between the inner ring and the outer ring; the inner ring is ring-shaped; the ring-shaped outer diameter of the inner ring is provided with a semi-open type cylindrical pocket hole and is connected with the rolling body; the retainer is arranged in the channel between the inner ring and the outer ring; the channel between the inner ring and the outer ring is connected with the rolling body; the retainer has a double-half structure; a semi-open type cylindrical pocket hole is formed in the middle of the retainer; and the rolling body is in the shape of a short cylinder and is arranged in the pocket hole of the retainer. The outer ring of the bearing is provided with a novel large-curvature arc-shaped grease channel; the grease channel with the structure is easy to machine; all functions of the original structure are kept; and the shortcomings that after the original trapezoidal grease channel is subjected to heat treatment, a black skin of the original trapezoidal grease channel is difficult to remove, particularly, black skins of chamfers on bottom edges of a groove cannot be cleaned thoroughly, hard turning is adopted in the existing removing technology, difficulty is high, and surface quality is poor after machining are overcome.

Description

technical field [0001] The invention relates to a roller bearing. Background technique [0002] High-speed and high-rigidity grease-lubricated double-row short cylindrical roller bearings are widely used in various high-speed and high-rigidity spindles (all kinds of lathes). Nowadays, high-speed and high-stiffness angular contact ball bearings in the world generally use grease lubrication instead of the old-fashioned oil bath lubrication. Since the bearing grease has a service life, new grease needs to be injected after it expires, so a grease injection groove is designed on the outer ring of the bearing. The bearing can be refilled with grease. However, current bearings usually use trapezoidal grease grooves. Although the structure of the trapezoidal grease injection tank is simple, it is difficult to remove the black skin after heat treatment, especially the chamfered bottom edge of the tank cannot be removed. Because the cleanliness of the grease injection tank directl...

AI Technical Summary

Problems solved by technology

Although the hard turning process can remove the black skin of the grease injection groove, it is difficult to process, especially because there are three grease injection holes in the grease injection groove, it is very easy to hit the knife during the turning process, and the production efficiency is low

This situation has plagued production units for a long time.

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