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DE-102018131257-B4 - Roller or needle bearings

DE102018131257B4DE 102018131257 B4DE102018131257 B4DE 102018131257B4DE-102018131257-B4

Abstract

Roller or needle bearing (1) with a bearing outer ring (2) and a set of rolling elements (3) for which a raceway (4) is formed on the bearing outer ring (2), wherein the bearing outer ring (2) is formed from a sleeve (5) having a hollow cylindrical section (6) forming the raceway (4) and a radially extending section (8) at one axial end (7) for the axial bearing of the rolling elements (3), wherein a cover (10) is arranged at the other axial end (9) of the sleeve (5) and is positively connected to the sleeve (5), wherein the sleeve (5) has a circumferential annular groove (11) on its outer circumference at the other axial end (9) which forms an undercut in the other axial end (9) in the axial direction (a), and wherein the cover (10) has a section (12) extending in the axial direction (a) which projects at least partially axially beyond the annular groove (11). wherein the section (12) is formed such that it extends at least partially into the annular groove (11) over its entire circumference, characterized in that the cover (10) with its radially extending section forms an axial run-up for the rolling elements (3), wherein the sleeve (5) has a first outer diameter (d1) at the base of the annular groove (11) and a second outer diameter (d2) at its other axial end (9), wherein the difference between the two diameters is: d 2 − d 1 > 0,06 mm as well as d 2 − d 1 < 1,6 ( d 3 − d 4 2 − s ) with d3 as the maximum outer diameter of the sleeve (5), d4 as the diameter of the raceway (4) and s as the thickness of the cover (10) in its radially extending region, and wherein the cover (10) has a thickness (so) in its radially extending region such that: 0,1 ( d 3 − d 4 2 ) < s 0 as well as s 0 < 0,6 ∗ ( d 3 − d 4 2 ) .

Inventors

  • Viktor Pfarherr
  • Christoph Mueller
  • Eugen Hess
  • Thomas Meyer
  • Patrick Huebschmann

Assignees

  • Schaeffler Technologies AG & Co. KG

Dates

Publication Date
20260513
Application Date
20181207

Claims (4)

  1. Roller or needle bearing (1) with a bearing outer ring (2) and a set of rolling elements (3) for which a raceway (4) is formed on the bearing outer ring (2), wherein the bearing outer ring (2) is formed from a sleeve (5) having a hollow cylindrical section (6) forming the raceway (4) and a radially extending section (8) at one axial end (7) for the axial bearing of the rolling elements (3), wherein a cover (10) is arranged at the other axial end (9) of the sleeve (5) and is positively connected to the sleeve (5), wherein the sleeve (5) has a circumferential annular groove (11) on its outer circumference at the other axial end (9) which forms an undercut in the other axial end (9) in the axial direction (a), and wherein the cover (10) has a section (12) extending in the axial direction (a) which projects at least partially axially beyond the annular groove (11). wherein the section (12) is formed such that it extends at least partially into the annular groove (11) over its entire circumference, characterized in that the cover (10) with its radially extending section forms an axial run-up for the rolling elements (3), wherein the sleeve (5) has a first outer diameter (d1) at the base of the annular groove (11) and a second outer diameter (d2) at its other axial end (9), wherein the difference between the two diameters is: d 2 − d 1 > 0,06 mm as well as d 2 − d 1 < 1,6 ( d 3 − d 4 2 − s ) with d3 as the maximum outer diameter of the sleeve (5), d4 as the diameter of the raceway (4) and s as the thickness of the cover (10) in its radially extending region, and wherein the cover (10) has a thickness (so) in its radially extending region such that: 0,1 ( d 3 − d 4 2 ) < s 0 as well as s 0 < 0,6 ∗ ( d 3 − d 4 2 ) .
  2. Roller or needle bearings according to Claim 1 , characterized in that the reshaped section (12) of the lid (10) is produced by a rolling process.
  3. Roller or needle bearings according to Claim 1 or 2 , characterized in that the sleeve (5) has a second outer diameter (d2) at its other axial end (9), wherein the following applies to this: d 4 + 0,2 ( d 3 − d 4 ) 2 < d 2 with d3 as the maximum outer diameter of the sleeve (5) and d4 as the diameter of the raceway (4).
  4. Roller or needle bearings according to one of the Claims 1 until 3 , characterized in that the sleeve (5) has a second outer diameter (d2) at its other axial end (9), wherein the following applies to this: d 2 < d 3 − 2 ∗ s with d3 as the maximum outer diameter of the sleeve (5) and s as the thickness of the cover (10) in the radially extending area thereof.

Description

Field of invention The invention relates to a roller or needle bearing with an outer bearing ring and a set of rolling elements for which a raceway is formed on the outer bearing ring, wherein the outer bearing ring is formed from a sleeve having a hollow cylindrical section forming the raceway and a radially extending section at one axial end for the axial bearing of the rolling elements, wherein a cover is arranged at the other axial end of the sleeve which is positively connected to the sleeve, wherein the sleeve has a circumferential annular groove on its outer circumference at the other axial end which forms an undercut in the axial direction at the other axial end, wherein the cover has a section extending in the axial direction which projects at least partially axially beyond the annular groove, wherein the section is formed such that it extends at least partially into the annular groove over its entire circumference. Background of the invention A roller or needle bearing of this type can be manufactured according to the prior art by forming a sleeve-shaped component, which forms the outer ring of the bearing, in one axial end region by means of a flanging process, so that an axial contact surface for the rolling elements is formed. A typical radial roller bearing, which is manufactured by forming technology as described, is therefore a single piece and has a bent, i.e., flanged, edge on one side. A disadvantage of such a forming-processed standard radial roller bearing is that the roller raceway is not fully supported. Furthermore, axial installation space is lost due to the flanging process. This means that raceway support is not fully guaranteed. Additionally, the production of such a bearing can be relatively expensive. According to another design, it is also possible to place a cover in an axial end area of the sleeve-shaped component, which is connected to the sleeve-shaped component by a snap connection or locking connection. A warehouse of the type mentioned at the beginning is made of the US 3 656 825 A as from the US 2 094 252 A known. Similar solutions show the US 2018/ 0 010 643 A1 , the US 2 057 102 A , the US 2 648 578 A and the GB 558 342 A. Object of the invention The present invention is based on the objective of creating a generic roller or needle bearing which ensures optimal support of the raceway and otherwise enables a simple and therefore cost-saving manufacturing method. Description of the invention According to the invention, this problem is solved in a roller or needle bearing according to the preamble of claim 1 in such a way that the cover with its radially extending section forms an axial run-up for the rolling elements, wherein the sleeve has a first outer diameter (d1) at the base of the annular groove and a second outer diameter (d2) at its other axial end, wherein the difference between the two diameters is: d2−d1>0,06 mm as well as d2−d1<1,6(d3−d42−s) with d3 as the maximum outer diameter of the sleeve, d4 as the diameter of the raceway and s as the thickness of the cover in its radially extending area, and wherein the lid has a thickness (s 0 ) in its radially extending area, for which the following holds: 0,1(d3−d42)<s0 as well as s0<0,6∗(d3−d42). The reshaped section of the lid is preferably produced by a rolling process. It has been shown that the geometric conditions in the design of the proposed bearing should advantageously lie within the specified range. Therefore, a minimum and a maximum value for the specified diameter difference, as well as a minimum and a maximum value for the specified thickness, are required. The sleeve preferably has a second outer diameter (d2) at its other axial end, for which the following applies: d4+0,2(d3−d4)2<d2 with d3 as the maximum outer diameter of the sleeve and d4 as the diameter of the raceway. On the other hand, the sleeve preferably has a second outer diameter (d2) at its other axial end, for which the following applies: d2<d3−2∗s with d3 being the maximum outer diameter of the sleeve and s being the thickness of the cover in its radially extending region. In this respect as well, a minimum and a maximum value for the aforementioned diameter are preferred. A possible, non-inventive method for manufacturing a roller or needle bearing of the type described is characterized by the fact that it comprises the following steps: a) Manufacture of the sleeve including an annular groove located on the outer circumference of the sleeve; b) Placing the set of rolling elements in the sleeve; c) Attaching the cover to the sleeve so that a section extending in the axial direction at least partially overlaps the annular groove; d) Applying a radial force to the lid to deform a section of the lid until a section of the lid extends into the annular groove. It is preferably provided that the application of the radial force to the cover according to step d) above is carried out by a rolling tool, wherein during the forming process the slee