Sectional-type holding frame and application thereof

Abstract

The present invention provides a sectional-type holding frame used for a ball bearing, the sectional-type holding frame comprises a plurality of independent space rings (1), the independent space rings (1) are distributed, in interval, between rolling bodies (2) with the same number as the independent space rings (1), each space ring (1) is provided with pocket grooves (3) at the contacting positions of the space ring (1) and the rolling bodies (2) at two sides of the space ring (1), the pocket grooves are provided with inner-concave curve surfaces (6) suitable for holding the rolling bodies (2), and opposite direction pocket grooves (3) of adjacent space rings (1) are matched to form pocket holes (4) for coercing the rolling bodies (2). Each space ring (1) is provided with at least one set of main oil hole (5), wherein the main oil hole (5) runs through the internal of the space ring (1), and is provided with openings in the pocket grooves (3) at two sides. By the way of holding of the rolling bodies (2) by the inner-concave curve surfaces (6), the rolling bodies (2) cannot contact the edges of the openings, of the at least one set of main oil hole (5), in the pocket grooves (3). Based on the sectional-type holding frame, the present invention also provides the ball bearing using the sectional-type holding frame, in particular, an angular contact ball bearing, a deep groove ball bearing or a four-point-contact ball-type swing bearing.

Description

technical field [0001] The invention relates to a segmented cage and a ball bearing using the segmented cage. Background technique [0002] For ball bearings with one-piece cages, the number of rolling elements is limited by the width of cage bar in the circumferential direction of the cage, so its load carrying capacity is also limited by the corresponding limit. Segmented cage (segmentedcage) allows the use of smaller circumferential spacing between rolling elements, thus allowing the same size bearing to fit more rolling elements. Such a cage can significantly improve the load-carrying capacity of the bearing, and has broad application prospects especially under low-speed and heavy-load conditions. [0003] Segmented cages currently on the market, such as figure 1 As shown, it is composed of a plurality of independent spacers (spacers) 1, and these spacers 1 are distributed between the same number of rolling elements 2 at intervals. Each spacer 1 is formed with pocket...

AI Technical Summary

Problems solved by technology

However, the penetrating design of the main oil hole 5 causes the rolling elements 2 to actually only touch the opening edge 7 of the main oil hole 5 on the concave spherical surface 6

This edge contact causes the contact stress between the roller 2 and the spacer 1 to concentrate at the opening edge 7 of the main oil hole 5, which intensifies the wear between the components and is not conducive to the relationship between the rolling element and the cage. The formation of lubricating oil film between them, thus reducing the mechanical efficiency and life expectancy of the whole bearing to a considerable extent

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