DE2405720C2 - Rolling elements for a rolling bearing - Google Patents

Description

30th

The invention relates to a rolling element for a rolling bearing, consisting of a hollow cylinder, which has a continuous, lubricant receiving, axial bore, the wall of a radial bore with a relatively small diameter is penetrated to the lubricant for To guide rolling element circumferential surface.

A rolling element construction of this type is already known as the state of the art, which is designed in this way is that a roller is provided with a bore which is in communication with a radial bore (GB-PS 5 79 252). The disadvantage of this known construction is the relatively high abrasion effect, as a result of which a shortening of the life of the rolling elements can result.

The prior art also includes a rolling element, the tubular rollers of which are formed in a spiral arranged spring elements are formed, so that helical grooves result (US-PS 5 88 667). By these grooves allow lubricant to leak outside. The production of these rolling elements is relatively expensive, wherein the helical grooves can produce undesirable disturbances in the lubricating film.

Carrying bodies for the rolling elements of axially loaded rolling bearings are also known as the state of the art, which are designed so that an inner cylinder has a number of inclined bores (DE-PS 9 35 825, DE-PS 9 19 804). On the outside there are alternating outer cylinders on the hollow inner cylinder and support disks arranged. Support disks are found between the multi-part outer cylinder parts Application, which disadvantageously results in a constant impairment of the uniform thickness of the Lubricating film results.

The object of the present invention is, on the basis of a rolling element of the initially introduced mentioned type of creating a construction which results in a reduction in the abrasion effect

This object is achieved according to the invention in that it fits into the axial bore of the hollow cylinder two inner hollow cylinders are used, the inner ends of which form a narrow gap into which the radial Bore of the rolling element opens. This has the advantage that lubricant over the intermediate gap and the radial bore reaches the outside, with a largely smooth surface of the outer cylinder is present so that the lubricant film can take full effect. This results in a reduction in Abrasion effect.

According to another feature of the invention, the two inner hollow cylinder on the outer Hollow cylinder protrude at both ends, the protruding ends with a, a outer and an inner race holding together cage are connected to the outer Hollow cylinder independent rotation of the two inner hollow cylinders. This takes advantage of this ,, the two inner cylinders at the two ends of the 'rolling element on frictional forces, i.e. via the from the Hohlzy'inder ends protruding on both sides, regardless of the outer hollow cylinder, whereby the abrasion of the outer cylinder is greatly reduced and thereby the rolling elements and the races always Sufficient lubricant is supplied, which is also essential to reduce the abrasion effect contributionL

According to a further feature of the invention, the outer and the inner hollow cylinder can in itself known way each consist of a chromium-nickel alloy. This chrome-nickel alloy, like her from a construction of a rolling element according to CH-PS 3 89 331 is known, is characterized by a high friction resistance.

The invention is explained in more detail below with the aid of an exemplary embodiment shown in the drawing described. Show in the drawing

F i g. 1 shows a section through the main components of the roller bearing;

F i g. 2 is a perspective view of the rolling elements;

F i g. 3 is an exploded perspective view of individual rolling element parts.

In Fig. 1 shows a rolling bearing A with rolling elements 14 which are arranged in an outer race 12 and an inner race 11 and are held in these by a cage not shown in detail. This structure is known per se.

The rolling element 14 is made of a nickel-chromium alloy, which is characterized by high friction resistance excels.

The rolling element 14 consists of an outer cylinder 15 with two inner cylinders 16, which with a narrow gap 17 are arranged within the outer cylinder 15. These inner cylinders 16 are something Longer than the outer cylinder 15 and protrude beyond this at both ends.

The entire cavity of the inner cylinder 16 is filled with a grease-like lubricant B , including the narrow gap 17, with a radial bore 18 communicating with the gap 17 and having a relatively small diameter as a discharge opening, so that the lubricant over the gap 17 can emerge with each revolution of the rolling element.

Also between the inner cylinders 16 and the

Outer cylinder 15 is a small distance, which to accommodate the over the outer and inner Race contributes to the rolling element applied frictional forces

The inner cylinders 16 take on frictional forces at both ends of the rolling element, i.e. via the from the Outer cylinder 15 protruding ends on both sides, regardless of the outer cylinder 15, whereby the abrasion of the outer cylinder 15 is greatly reduced and the rolling elements and the races always Sufficient lubricant is supplied, which is also essential to reduce the abrasion effect contributes

1 sheet of drawings

Claims (3)

Patent claims: 1. Rolling elements for a rolling bearing, consisting of a hollow cylinder, which has a continuous, Has lubricant receiving, axial bore, the wall of a radial bore is penetrated with a relatively small diameter to the lubricant to the rolling element peripheral surface to direct, characterized in that in the axial bore of the Hollow cylinder (15) matching two inner hollow cylinders (16) are used, the inner ends of which one form a narrow gap (17) in which the radial bore (18) of the outer hollow cylinder (14) flows out. Z rolling element according to claim 1, characterized in that the two inner hollow cylinders (16) protrude beyond the outer hollow cylinder (15) at both ends, the imaginary Ends with a cage holding an outer and an inner race (12, U) together There are connections to the rotation of the two inner cylinders independent of the outer hollow cylinder (15) Hollow cylinder (16). 3. Rolling bodies according to claim 1 and 2, characterized in that the outer and the inner Hollow cylinders (15, 16) each consist of a nickel-chromium alloy in a manner known per se.