Angular contact roller bearing and cage for an angular contact roller bearing

Abstract

Angular contact roller bearing (20), comprising a cage (1) with a cage body (2) having rectangular pockets (3) provided thereon and separated by webs (4) and cylindrical rolling elements (11) received therein, wherein the webs (4) have a profile (5) and the cage body (2) has an inner rim (10) on the inner circumference and an outer rim (9) on the outer circumference, wherein the two rims (9, 10) extend in two axially offset planes, characterized in that the rims (9, 10) extend in the axial direction, wherein the webs (4) are connected to an same edge of both rims (9, 10).

Description

[0001] The invention relates to an angular contact roller bearing comprising a cage with a cage body having rectangular pockets provided thereon and cylindrical rolling elements separated by webs.

[0002] Such angular contact roller bearings are used, for example, in chassis and brake applications in the automotive sector. A general example of such an angular contact roller bearing is described in DE 103 42 132 A1. The angular contact roller bearing shown there has two bearing discs that have raceways for the cylindrical rolling elements. The cylindrical rolling elements themselves are held and guided in a cage, which has a cage body with a corresponding number of rectangular, fully enclosed pockets separated circumferentially by webs. The cage itself is relatively solid and designed as a conical ring disc.

[0003] US Patent 2023 / 0407910A1 also shows an angular contact roller bearing. The cage in which the rolling elements are held is solid and has a groove on its radially outer edge into which retaining tabs formed from the outer race engage.

[0004] DE 10 2005 027 521 A1, DE 10 2020 131 828 A1 and DE 10 2022 110 319 A1 also disclose angular contact roller bearings with solid cages for holding the rolling elements. The invention addresses the problem of providing an improved angular contact roller bearing.

[0005] To solve the problem, in an angular contact roller bearing of the type mentioned above, it is provided according to the invention that the flanges extend in the axial direction, with the webs being attached to the same edge of both flanges.

[0006] The angular contact roller bearing according to the invention uses a cage made from a formed sheet of metal. It has a cage body with a number of rectangular, fully enclosed pockets distributed around its circumference, each pocket accommodating a cylindrical rolling element, such as a needle or a roller. The pockets are spaced circumferentially by webs, which are provided with a corresponding profile created by forming. The formed webs thus have axially extending ridges and depressions and are therefore not flat, unlike in the prior art mentioned above. This profiling provides the webs with appropriate stiffness and also improves the guidance and retention of the individual rolling elements on the cage made from the thin sheet of metal.

[0007] Furthermore, axially projecting flanges are provided on the inner and outer circumferences of the cage body. These flanges run in a ring-like fashion around the respective circumference and are essentially band-shaped, thus exhibiting a certain axial extension. Both flanges project in the same direction on the inner and outer circumferences. These flanges provide the cage with additional rigidity. The flanges run in different axial planes, resulting in an overall conical shape for the cage. However, due to the forming process in the area of ​​the webs and flanges, the cage exhibits high rigidity. This cage can be manufactured from a single sheet of metal in a single stamping and forming step. This means that the cage is cut from the metal sheet, and the corresponding forming of the webs and flanges, as well as the creation of the conical shape, is performed simultaneously.The cage is therefore not a solid component, but a lightweight cage manufactured from a simple, thin sheet of metal or steel solely through forming without machining. As a result of the corresponding forming in the web area and the flanges, a profile cage is created, which, depending on the type of forming in the web area, is designed as an M- or W-cage, sometimes also called a sigma cage, but is nevertheless a angular contact roller bearing cage.

[0008] The edges themselves extend axially as described according to the invention, i.e., they are ribbon-shaped and have a certain axial height. The webs themselves are directly attached to an edge of both edges, and this is the same edge in each case, since the edges project in the same axial direction.

[0009] The quasi-band-shaped flanges themselves preferably run parallel to each other and at an angle other than 90° to the adjoining web sections. This means that the flanges project in the axial direction, i.e., parallel to the axis of rotation of the angular contact roller bearing, while the webs run at an angle other than 90° to the axial direction or axis of rotation, corresponding to the angle at which the cylindrical rolling elements, which may also be angularly offset in the pockets, are intended to rotate relative to the axis of rotation.

[0010] Preferably, the angular contact roller bearing is an encapsulated bearing, i.e., it comprises two bearing disks with an L-shaped cross-section, each comprising a disk section with a raceway for the rolling elements and an edge section connected to it at an angle. The two edge sections encompass the two flanges and run parallel to them. The angle between the edge sections of the disks and the disk sections with the raceways corresponds to the angle at which the band-shaped flanges run to the webs, so that the band-shaped edge sections encompass the band-shaped flanges parallel to them. Radially, the two edge sections run adjacent to the flanges provided on the inner and outer circumferences of the cage, resulting in a correspondingly encapsulated bearing.

[0011] It is advantageous if the two bearing discs are locked to the cage, i.e., if a captive bearing assembly is provided. For example, the bearing discs can be snapped onto their respective flanges with their edge sections, or similarly.

[0012] The rolling elements themselves are preferably needles, meaning they have a corresponding length but a considerably smaller diameter. However, the rolling elements can also be designed as rollers.

[0013] In addition to the angular contact roller bearing itself, the invention further relates to a cage for an angular contact roller bearing of the type described above. The cage has a cage body with rectangular pockets provided thereon, separated by webs, and cylindrical rolling elements received therein. It is characterized in that the webs have a profile produced by forming, and the cage body has an inner rim on its inner circumference and an outer rim on its outer circumference, wherein the two rims run in two axially offset planes and extend in the axial direction, with the webs being connected to the same edge of both rims.

[0014] The quasi-ribbed edges extend in an axial direction, with the webs attached to one edge of both edges. They expediently run parallel to each other and at an angle other than 90° to the adjoining web sections of the profiled webs, which are characterized by raised and recessed sections.

[0015] The invention is explained below with reference to exemplary embodiments and the drawings. The drawings are schematic representations and show: Fig. 1 a perspective partial view of a cage according to the invention for an angular contact roller bearing, and Fig. 2 a schematic representation of an angular contact roller bearing according to the invention.

[0016] Fig. Figure 1 shows a cage 1 according to the invention, which is manufactured from a sheet metal part by forming. The cage 1 has a cage body 2 on which a plurality of circumferentially distributed pockets 3 are provided, spaced apart from one another by corresponding webs 4. The webs 4 themselves are provided with a profile 5 by forming; in the initial example shown, they have an axial projection 6 located essentially in the middle of the web length, to the right and left of which undeformed, flat web sections 7, 8 are provided. These web sections 7, 8 are each connected to edges of flanges 9, 10, which are also produced by forming and extend in a band-like fashion around the outer and inner circumference of the cage 1, which has a quasi-conical basic shape. The two flanges 9, 10 project axially to the same side, i.e., they run around and concentrically to the axis of rotation of the cage or the complete rolling bearing.The cage shown is therefore a profile cage with a W or Sigma design.

[0017] The two ledges 9, 10 run at an angle other than 90° to the adjoining pier sections 7, 8, as Fig. As can be seen from Figure 2. Due to the conical geometry, the angle between the web section 7 and the subsequent edge 9 is less than 90°, while the angle between the web section 8 and the subsequent edge 10 is greater than 90°. Consequently, edges 9 and 10 run, as shown in particular Fig. As shown in point 2, they are in different planes and are therefore axially spaced apart.

[0018] Fig. Figure 2 shows a complete angular contact roller bearing 20, comprising a bearing according to the invention and in Fig. Figure 1 shows a cage 1, in each of whose individual pockets 3 a cylindrical rolling element 11, here designed as a needle, is received. Each rolling element 11 is held and guided in the respective pocket 3 or on the cage 1 in the best possible way, resulting from the corresponding profile 5 and the formed projection 6 on the respective webs 4, as shown by the dashed lines in Figure 1. Fig. Figure 2 shows the rolling elements 11, since it is an angular contact roller bearing 20, which are of course also at an angle other than 90° to the axis of rotation.

[0019] Furthermore, two bearing discs 12, 13, each L-shaped, are provided. The bearing disc 11 has a disc section 14 with a raceway 15 for the rolling elements 11, to which an edge section 16 is attached at an angle, which also projects axially and in which Fig. In the assembly position shown in Figure 2, the outer edge 9 is encompassed. In a comparable design, the bearing disc 13 also has a disc section 17 with a raceway 18 for the rolling elements 11, to which an edge section 19 is also attached at an angle, which projects axially and in the Fig. In the assembly position shown in Figure 2, the inner edge 10 is enclosed. The angles at which the edge sections 16 and 19 run to the respective disk sections 14, 17 are chosen according to the geometry of the cage 1 or according to the angle that the angular contact roller bearing 20 is to form.

[0020] The edge sections 16, 19 are expediently locked to the flanges 9, 10, for example by snapping them together, so that a captive arrangement and a secure encapsulation of the angular contact roller bearing 20 results.

[0021] The bearing discs 12, 13 are also made from a simple, correspondingly thin sheet of metal by stamping and forming in one operation. Reference symbol list 1 cage 2 cage bodies 3 pockets 4 bridges 5 Profiling 6 Survey 7 Bridge section 8 Bridge section 9 Board 10 Board 11 rolling elements 12 bearing disc 13 Bearing washer 14 disc section 15 Career 16 marginal section 17 disc section 18 career 19 Marginal section 20 tapered roller bearings

Claims

[1] Angular contact roller bearing (20) comprising a cage (1) with a cage body (2) having rectangular pockets (3) provided thereon and separated by webs (4) and cylindrical rolling elements (11) received therein, wherein the webs (4) have a profile (5) and the cage body (2) has an inner rim (10) on the inner circumference and an outer rim (9) on the outer circumference, wherein the two rims (9, 10) extend in two axially offset planes, characterized by , that the rims (9, 10) extend in an axial direction, with the webs (4) being attached to an equal edge of both rims (9, 10). [2] Angular contact roller bearing (20) according to claim 1, characterized by , that the rims (9, 10) run parallel to each other and are at an angle other than 90° to the adjoining web sections (7, 8). [3] Angular contact roller bearing (20) according to any one of the preceding claims, characterized by, that two bearing disks (12, 13) with an L-shaped cross-section are provided, each comprising a disk section (14, 17) having a raceway (15, 18) for the rolling elements (11) and an edge section (16, 19) connected to it at an angle, wherein the two edge sections (16, 19) encompass the two rims (9, 10) and run parallel to them. [4] Angular contact roller bearing (20) according to claim 3, characterized by , that the two bearing discs (12, 13) are locked to the cage (1). [5] Angular contact roller bearing (20) according to any one of the preceding claims, characterized by , that the rolling elements (11) are needles. [6] Cage for an angular contact roller bearing (20) according to one of the preceding claims, comprising a cage body (2) with rectangular pockets (3) provided therein and cylindrical rolling elements (11) received therein, wherein the webs (4) have a profile (5) and the cage body (2) has an inner rim (10) on the inner circumference and an outer rim (9) on the outer circumference, wherein the two rims (9, 10) extend in two axially offset planes, characterized by , that the rims (9, 10) extend in an axial direction, with the webs (4) being attached to an equal edge of both rims (9, 10). [7] Cage according to claim 6, characterized by , that the rims (9, 10) run parallel to each other and are at an angle other than 90° to the adjoining web sections (7, 8).

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