RU2538903C1 - Radial-thrust single-row cageless ball bearing - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: radial-thrust single-row ball bearing comprises an internal carrying race (1) with circumferential radius groove (2) on the external surface, an external carrying race (3) and a set of balls. The internal surface of the race (3) is cylindrical and has one-sided edge collar (5), a setting ring (6) rests upon the said collar and partially upon the cylindrical surface, the ring is fitted by a ball thrust surface by which it gets in contact on its side with the set of balls filling by part of their volume the inter-race space and the space of the circumferential radius groove of the race (1) touching each other, on the opposite side the ring (6) is closed by a ring-shaped insertion (9) with a setting collar that is fitted by a ball thrust surface and is in contact with the set of balls, and together with the insertion (9) resting upon the cylindrical surface of the race (3) and an end lock element it closes the power train of the parts composing the bearing on the whole.

EFFECT: design of a bearing where at maximal number of installed balls in the set which are partially located in the interrace space and partially in the space of circumferential radius grooves on the internal and external carrying races, the latter are nonsplit thus providing for lower contact stresses and simplified conditions for mounting in, mainly, radial direction.

2 cl, 3 dwg

Description

The invention relates to mechanical gears, and more particularly to the components of mechanical gears - rolling units.

A single-row angular contact ball bearing is known, including an inner bearing ring with a circumferential radial groove on the outer surface, an outer bearing ring with an identical groove on the inner surface, forming ball-resistant collars, a set of balls located part of its volume in the circumferential radial grooves called rings and combined in its free part by a separator (see the book "Rolling bearings", reference book, Moscow, publishing house Mechanical Engineering, 1984, p. 193), (I).

In the known bearing, the number of component balls, according to the assembly conditions, is insufficient to absorb increased loads due to the occurrence of high contact stresses and subsequent possible crushing of the working surfaces, and the separator as a moving component reduces the reliability of the bearing.

Also known is a single-row angular contact ball bearing, including an inner bearing ring with a circumferential radial groove on the outer surface, an outer split bearing ring with an identical groove on the inner surface, forming ball-resistant collars, a set of balls located part of their volume in circumferential radial grooves of these rings and combined in their free part by a separator, while the presence of an external split bearing ring allows you to set maxim in the separator Flax number of balls (ibid., page 12, Figure 8 "in»), (II).

In the known bearing, the outer bearing ring, being split, violates the uniform perception of the current load by a set of balls even with their maximum number in the cage, not contributing to a significant reduction in contact stresses of the working surfaces, and complicates the installation conditions in the radial direction. It has limited use in rolling units.

The aim of the present invention is to provide a bearing design in which, with the most set number of balls in the set, located partly in the inter-ring space and partly in the space of the circumferential radius grooves of the inner and outer bearing rings, the latter would be continuous, which would help to reduce contact stresses and simplification of installation conditions mainly in the radial direction.

This goal is achieved by the fact that the inner surface of the outer bearing ring is cylindrical, has a one-sided flange, against which and partially with the cylindrical surface there is a mounting ring equipped with a ball-resistant surface, which it contacts on its side with a set of balls filling part of its volume inter-ring space and the space of the circumferential radial groove of the inner bearing ring, being in contact with each other, from the opposite side The mounting ring is closed by a ring-shaped insert with a mounting collar provided with a ball-resistant surface and in contact with a set of balls, and together with the ring-shaped insert resting on the cylindrical surface of the outer bearing ring and the end retaining element, locks the power chain of the parts making up the bearing as a whole.

In addition, the ball-bearing surfaces of the mounting ring and the mounting collar of the annular insert are identical to the surface of the circumferential radius groove of the inner bearing ring and are in the same circumferential axis with it.

The bearing design is illustrated by drawings, where:

- Fig. 1 shows a sectional bearing;

- Fig. 2 shows a view of the bearing on the left with a local section;

- Fig. 3 shows an enlarged view of the internal relative position of the mounting ring, a set of balls (one ball in cross section) and the ring-shaped insert with the mounting collar, and also illustrates the possibility of filling the bearing cavity with balls when the ring-shaped insert is removed.

The proposed bearing consists of an inner bearing ring 1 with a circumferential radial groove 2 on its outer surface, an outer bearing ring 3, the inner surface 4 of which is cylindrical and bounded by an edge collar 5. An installation ring 6 abuts an edge collar 5, the ball-bearing surface 7 of which is located in contact with a set of balls (one cross-sectional ball is shown) 8 located in the inter-annular cavity and partially in the circumferential radius groove 2, the number of balls 8 being the maximum. An annular insert 9, having its support on the inner cylindrical surface 4 of the outer bearing ring 3 and partially the surface of the element A of the mounting ring 6, with the mounting collar 10 located on it and bearing the ball-resistant surface 11 together with the locking element 12, crowns the bearing device.

Assembly of the bearing, as can be seen from Figs. 1, 2, 3, is not difficult, except for the need to have a working table and a fixture for assembly. In this case, in the designated place of the fixture, the outer bearing ring 3 is fixed by the edge collar 5 facing the table. Then, the inner carrier ring 1 is also installed in the device at the designated location. It is symmetrical. On the edge flange 5, an installation ring 6 is laid inside, being turned with its ball-bearing surface 7 towards the inner bearing ring 1. Further, balls are introduced alternately into the space between the cylindrical surface 4 of the outer bearing ring 3 and the outer surface of the inner bearing ring 1 and then into the groove 2 8 from a set of balls in a predetermined quantity (calculated geometrically), but from the calculation, so that their number is the maximum. It should be noted here: so that the balls during assembly do not fall out of the groove, a certain amount of grease should be put in the groove. The possibility of the process of filling the balls with the location indicated above is confirmed by the empirical dependence illustrated in Fig. 3 and expressed as: (R ₁ -R ₂ )> ⌀ of the _ball (⌀ is the diameter of the ball) at least a fraction of a millimeter. After filling the groove 2 with a set of balls 8, the ring-shaped insert 9 is pressed into the inner cylindrical surface 4 of the outer bearing ring 3 to a small extent against the element A of the mounting ring 6. The location of the ring-shaped insert 9 at this stage is unambiguous, according to the figures. Thus, the set of balls 8 is locked in its working groove, limited by: a circumferential radius groove 2 of the inner bearing ring 1, ball-resistant surfaces 7 of the mounting ring 6 and 11 of the mounting collar 10, the inner surface of the annular insert 9. Bearing assembly on a magnetic table may be preferable.

The arrangement of the locking element 12 ends the assembly of the bearing. The adjustment of the bearing consists mainly in its assembly by the selective method, the subsequent break-in on the stand with the strain gauge fixation of stressed connecting places, which are eliminated by entering other similar parts with different tolerance fields.

The performance and bearing capacity of a bearing is determined experimentally, however, one thing is clear: the no more balls are involved in the transfer of the effective load, the lower contact stresses are experienced on the working surfaces of the parts.

Claims (2)

1. Single-row angular contact ball bearing, including an inner bearing ring with a circumferential radial groove on the outer surface, which forms ball-bearing collars, an outer bearing ring, a set of balls located part of its volume in the inter-ring space, and part in the space of the circumferential radial grooves of the inner and outer bearing rings, characterized in that the inner surface of the outer bearing ring is cylindrical, has a one-sided edge, in which m and partially with a cylindrical surface there is a mounting ring equipped with a ball-resistant surface, with which it contacts on its side with a set of balls filling part of its volume between the annulus and the circumferential radius groove of the inner bearing ring, being in contact with each other, on the opposite side the ring is closed by an annular insert with a mounting collar provided with a ball-resistant surface and in contact with a set of balls, and together with the ring-shaped liner resting on the cylindrical surface of the outer bearing ring and the end stop element, it locks the power chain of the parts that make up the bearing as a whole. 2. The bearing according to claim 1, characterized in that the ball-bearing surfaces of the mounting ring and the mounting collar of the ring-shaped insert are identical to the surface of the circumferential radius groove of the inner bearing ring and are in the same circumferential axis with it.

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