Comb retainer for Sendzimir bearing

Abstract

The invention belongs to the technical field of bearings, in particular to a comb retainer for a Sendzimir bearing. The retainer is in a retainer pocket structure shape of a double-segment type comprising an arc and a line and is in the combined type of a part of arc shape and a part of line shape instead of the shape of simple arc pockets, and the depths of the pockets adopt an alternate arrangement mode that one is deep and another is shallow. The invention has the advantages that (1) the common single arc pocket structure of the retainer is changed into the combined type of an arc and a line so that a roll to be assembled can be mounted from the internal diameter of the retainer to avoid scratching a bearing roll and further ensure the accuracy and the service life of the bearing; and (2) the depths of the pockets adopt the alternate arrangement mode that one is deep and another is shallow so as to ensure the axial cascading of the retainer, more importantly improve the lubrication, avoid abrasion and overhigh temperature rise in the high-speed rotation of the bearing and improve the service life and the stability of the bearing.

Description

Technical field [0001] The invention belongs to the technical field of bearings and relates to a comb-shaped cage used for Sendzimir bearings. Background technique [0002] With the rapid development of the domestic and foreign steel industry, in order to meet the rolling requirements of high-precision and high-strength cold-rolled plates, the requirements for high-precision Sendzimir bearings are getting higher and higher. [0003] At present, there is a huge gap between domestic high-precision Sendzimir bearings and foreign countries. 90% of Sendzimir bearings are imported from abroad. In order to quickly realize the localization and import substitution of high-precision Sendzimir bearings, the outer ring has three ribs and a cage. The double-row cylindrical high-precision Sendzimir bearings are particularly important, but the double-row cylindrical bearings with ribs are difficult to assemble due to the cage. For cylindrical bearings with low precision, the traditional as...

AI Technical Summary

Problems solved by technology

[0003] At present, there is a huge gap between domestic high-precision Sendzimir bearings and foreign countries. 90% of Sendzimir bearings are imported from abroad. In order to quickly realize the localization and import substitution of high-precision Sendzimir bearings, the outer ring has three ribs and a cage. The double-row cylindrical high-precision Sendzimir bearings are particularly important, but the double-row cylindrical bearings with ribs are difficult to assemble due to the cage. For cylindrical bearings with low precision, the traditional assembly method is OK, but for high-precision For precision Sendzimir rolling mill bearings, this method will inevitably cause the loss of bearing accuracy, and at the same time, the bearing raceway will inevitably be scratched, and the life of the bearing will also decrease. Therefore, a new type of cage must be invented to solve this problem

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