CS198283B2 - Massive cage of the double-row tilting bearing guided by the outer ring - Google Patents

Description

The invention relates to a massive cage of a double-row spherical roller bearing guided by an outer ring comprising two equal parts, provided on one side with open pockets for receiving rollers.

Massive cages of double-row spherical roller bearings guided by an outer ring formed in one piece are known. Such a cage is provided on both sides with partitions formed with a cage in one piece which form pockets for the rollers, the massive cage being made of brass or similar material. Such a massive cage has a long lifetime even under vibration stress and is well lubricated. However, its production is relatively expensive, since the cage must be mainly machined. In order to insert the massive cage into the outer bearing, the cage must be flattened on two radially opposite sides so that it is not guided at these points, the lubricating film is interrupted and scratched edges are created, increasing wear.

Also known is a massive cage consisting of two independent halves, each of which is unilaterally provided with pockets for rollers. However, the two cage halves are not guided on the outer bearing ring, but on the guide ring connected to the inner bearing ring. This is disadvantageous because the centrifugal force forces the lubricant out of the sliding surface, so that there is a risk of dry friction and thus heating and premature wear of the bearing.

Finally, a two-piece solid cage is known, consisting of two independent halves, each of which is provided with one-sided cylindrical pockets and is guided through the flange extension of the bearing outer ring. However, the mutual independence of the two halves of the massive cage carries the risk that, in particular when the bearing is unbalanced, the two halves of the massive cage rotate at different speeds, so that at least one row of rollers slip occurs instead of rolling causing undesirable wear. Since the two halves of the massive cage are made of metal, they must be provided with radially opposite flattenings for assembly reasons, which has the disadvantages mentioned above. In addition, it is preferable from the point of view of lubrication hydrodynamics that the sliding surface of the cage along the outer bearing ring is distributed in the same way as the cage itself.

98283

The above-mentioned drawbacks are overcome by a massive cage of a double-row spherical roller bearing consisting of two equal parts, each of which is provided with one-sided open pockets for receiving rollers on one side. protrusions and depressions are provided for non-rotatably connecting the two parts to each other, the two parts being surrounded on their outer periphery by a guide ring of elastic material, in particular plastic, which is supported by its outer surface on the inner surface of the outer bearing ring.

In order to further improve the positive connection of the two parts, according to the invention, each part between the partition walls forming the pockets for the rollers and its front contact surface is provided with a rotational peripheral surface descending towards the partition walls.

According to the invention, the bars are bent in a direction perpendicular to the bottom of the roller pockets to achieve good roller guidance.

The massive cage of a double row spherical roller bearing guided by an outer ring according to the invention has numerous advantages. Above all, its production is cheap, because dividing the massive cage into three parts reduces both the manufacturing effort and the material costs. Since the massive cage is guided by the outer race of the bearing, the respective guide surface is reliably lubricated by centrifugal forces. Because the guide ring of the massive cage is made of plastic, the bearing can withstand considerable vibration loads. The massive cage need not be provided with mounting flats or the bearing outer ring with mounting recesses, since the guide ring fits into the outer bearing ring within the elastic deformations. This not only makes production cheaper, but also improves lubrication of the contact surface between the guide ring and the outer ring. The interlocking connection of the two cage parts ensures that both rows of rollers roll at the same speed, so that undesirable wear of the bearing does not result in roller slippage.

An exemplary embodiment of a massive double row spherical roller bearing cage guided by an outer ring according to the invention is shown in the accompanying drawing, in which Fig. 1 shows the spherical roller bearing in cross-section and in section. 2 detail of a massive cage in section.

The tilting roller bearing consists of an inner ring 1 with side supports 2, an outer ring 3 and two rows of rollers 5, 5, held by a massive cage. The massive cage consists of two identical parts 16, 6a, each of which is provided on one side with pockets for the rollers 4, 5 and a guide ring surrounding both parts 6, 6a and guided by its outer rotating surface over the inner surface of the outer ring. _3 · ₉ 6_ Both parts 6a are formed from sintered metal, and are contact on their end faces facing inwardly of the bearing, provided with staggered and uniformly distributed Έ protrusions and recesses which can engage into one another. As a result, the two parts 6, 6a are positively positioned relative to each other so that they cannot rotate against each other. Each part 6, 6a is provided on one side facing the outside of the bearing with partitions 11 which separate the individual pockets for the individual rollers 6, 5 from each other. Between the crossbars 11 and its front contact surface, each portion 6a is provided with a rotational peripheral surface 10 descending conically towards the crossbars 11. The inner surface of the guide ring 60 is adapted in its shape to the two rotating circumferential surfaces 10 of the two parts 6, 6a so that it has the shape of a hollow truncated double cone of a common wider base.

The guide ring 7 mounted on both parts 6, 6a retains the two parts 6, 6a with one another so that the interlocking protrusions 8 and the recesses 9 * cannot spring out of engagement and the two parts 6, 6a are immovably connected to each other. . The elasticity of the guide ring makes it possible to insert the massed cage thus assembled after it has been filled with rollers 4, 5 into the outer ring 3 by simple pressure.

The parts 6, 6a of the massive cage according to the invention can be easily produced by sintering powdered metal.

From the powdered metal, the two parts 6a are first molded in the shape shown in FIG. 2 by dash-dotted lines, where the partitions 11 are perpendicular to the faces of the parts 6, 6a. they bend in the direction that they are perpendicular to the bottom 12 of the pocket for the rollers 4, 5, which is their final shape.

Claims (3)

A massive cage of a double row spherical roller bearing, guided by an outer ring, consisting of two and equal parts each having one side open pockets for receiving the rollers, characterized in that each part (6, 6a) has on its other side The projections (8) and depressions (9) are formed for the non-rotatable connection of the two parts (6, 6a) to each other, the two parts (6, 6a) being surrounded by a guide ring (7) of elastic material, especially plastic which, with its outer surface, is mounted on the inner surface of the outer bearing ring (3). Massive cage according to claim 1, characterized in that each part (6, 6a) is provided with a rotational peripheral surface (10) descending in the direction between the partition walls (11) forming the pockets for the rollers (4, 5) and its front contact surface. to the partitions / 11 /. 3. Massive cage according to points 1 and 2, indicating! The method according to claim 1, characterized in that the partitions (11) are bent in a direction perpendicular to the bottom (12) of the roller pockets (4, 5).