Retainer for radial roller bearing

Abstract

Provided is a structure that can prevent excessive contact pressure at the rolling contact surfaces of rollers disposed in a pocket (21a) at a first circumferential end and in a pocket (22a) at the other circumferential end of a discontinuous portion (11b), and at the rolling contact portions of the tracks of the outer race and the inner race. An engaging portion (14a) for engaging, in a state of inhibited relative displacement in relation to the axial direction, a first circumferential end portion (12a) and the other circumferential end portion (13a) end of the discontinuous portion (11b) is constituted by a first asperity portion (15b) and a second asperity portion (16b). The first asperity portion (15b) is constituted by a first engaging protruding portion (17b) and a pair of first engaging recessed portions (18b, 18b). The second asperity portion (16b) is constituted by a pair of engaging protruding portions (19b, 19b) and a second engaging recessed portion (20b). An engaging portion-side pocket (23a) formed in the first engaging protruding portion (17b) passes through the first engaging protruding portion (17b) in a diametrical direction.

Description

technical field [0001] The invention relates to an improvement of a cage for radial roller (including needle roller) bearings. More specifically, it relates to a cage for a radial roller bearing having a discontinuous portion at least one location in the circumferential direction, and end portions provided across the discontinuous portion are engaged with each other at engaging portions. By improving the structure of the above-mentioned engaging portion, it is possible to prevent the rolling surface of each roller arranged between the pocket at one end in the circumferential direction and the pocket at the other end in the circumferential direction sandwiching the above-mentioned discontinuous portion from contacting the outer ring and the inner ring. The surface pressure of the rolling contact part between the raceways of the ring is too large. Background technique [0002] The part to which a large radial load is applied in the rotating support part of various mechanical ...

AI Technical Summary

Problems solved by technology

However, although the relative displacement of one end and the other end of the cage 7b in the axial direction is limited by the mutual engagement of the first concave-convex portion 15a and the second concave-convex portion 16a, the relative displacement of the two in the circumferential direction is not restricted. displacement

Therefore, when the retainer 7b elastically deforms and expands in diameter, there is a possibility that a pocket on the side of the engaging portion may appear due to a change in the state of engagement between the first engaging concave portion 18a and the second engaging convex portion 19a. If the width of 23 in the circumferential direction increases, the roller cannot be held stably in the pocket 23 on the side of the engaging part.

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