CAGE SEGMENT FOR A ROLLING-ELEMENT BEARING CAGE

Abstract

A single-pocket cage segment of a multipart rolling-element bearing cage includes first and second side walls connected by first and second end walls. At least one of the first and second side walls or at least one of the first and second end walls is a semi-finished profile. The semi-finished profile may include a longitudinal channel in which a portion of an auxiliary body and/or a portion of a connector may be inserted.

Claims

1. A single-pocket cage segment of a multipart rolling-element bearing cage, the cage segment comprising: first and second side walls connected by first and second end walls, wherein at least one of the first and second side walls or at least one of the first and second end walls is a semi-finished profile.

2. The cage segment according to claim 1, wherein the semi-finished profile is metal bar stock.

3. The cage segment according to claim 1, wherein the cage segment is configured to guide a roller element.

4. The cage segment according to claim 1, wherein each of the first and second side walls and each of the first and second end walls is a semi-finished profile.

5. The cage segment according to claim 1, wherein the first side wall is connected to the first end wall by a connector.

6. The cage segment according to claim 1, wherein the semi-finished profile includes at least one longitudinally extending channel.

7. The cage segment according to claim 1, including an auxiliary body releasably attached to the semi-finished profile.

8. The cage segment according to claim 7, wherein the auxiliary body is configured to guide a rolling element located inside the cage segment or located adjacent to the cage segment.

9. The cage segment according to claim 7, wherein the auxiliary body is configured to interact with a flange or a raceway of a bearing ring.

10. The cage segment according to claim 7, wherein the auxiliary body includes coupling means for coupling the cage segment to a further cage segment.

11. The cage segment according to claim 7, wherein the auxiliary body is attached to the semi-finished profile, and wherein the auxiliary body faces into the pocket or faces away from the pocket or faces toward a rotational axis of the bearing or faces away from a rotational axis of the bearing.

12. The cage segment according to claim 7, wherein the auxiliary body is attached to the semi-finished profile by a screw.

13. The cage segment according to claim 1, including an auxiliary body attached to the semi-finished profile, wherein the semi-finished profile includes a channel extending in a length direction of the semi-finished profile, the channel having a cross-sectional shape, wherein the auxiliary body includes a rib or projection having a shape complementary to the cross-sectional shape of the channel, the rib being slidably received in the channel.

14. The cage segment according to claim 1, including a connector connecting the first side wall to the first end wall, wherein each of the first and second side walls and each of the first and second end walls is a semi-finished profile, wherein each of the semi-finished profiles includes a channel extending in a length direction of the semi-finished profile, each of the channels having a cross-sectional shape, wherein the connector includes a first body connected to a second body, the first body having a shape complementary to the cross-sectional shape of the channel of the first side wall and being slidably received in the channel of the first side wall and the second body having a shape complementary to the cross-sectional shape of the channel of the first end wall and being slidably received in the channel of the first end wall.

15. The cage segment according to claim 14, including an auxiliary body attached to the first side wall, wherein the auxiliary body includes a rib or projection having a shape complementary to the cross-sectional shape of the channel of the first side wall, the rib being slidably received in the channel of the first side wall.

16. The cage segment according to claim 1, wherein the semi-finished profile is manufactured from metal.

17. A rolling-element bearing cage including a plurality of cage segments according to claim 1.

18. A rolling-element bearing comprising: an inner ring; an outer ring; a plurality of rolling elements disposed between the inner ring and the outer ring, and a plurality of cage segments according to claim 1, wherein each of a first subset of the plurality of rolling elements is located in one of the plurality of cage segments and each of a second subset of the plurality of rolling elements is located between an adjacent pair of the cage segments.

19. A rolling-element bearing comprising: an inner ring; an outer ring; a plurality of rolling elements disposed between the inner ring and the outer ring, and a plurality of cage segments according to claim 13, wherein each of a first subset of the plurality of rolling elements is located in one of the plurality of cage segments and each of a second subset of the plurality of rolling elements is located between an adjacent pair of the cage segments.

20. A rolling-element bearing comprising: an inner ring; an outer ring; a plurality of rolling elements disposed between the inner ring and the outer ring, and a plurality of cage segments according to claim 20, wherein each of a first subset of the plurality of rolling elements is located in one of the plurality of cage segments and each of a second subset of the plurality of rolling elements is located between an adjacent pair of the cage segments.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG. 1 is a plan view of a cage segment according to a first embodiment of the present disclosure.

[0021] FIG. 2 is a sectional view through the cage segment of FIG. 1.

[0022] FIG. 3 is a perspective partially exploded view of the cage segment of FIG. 1.

[0023] FIG. 4 is a perspective view of a detail of the cage segment of FIG. 1.

[0024] FIG. 5 is a perspective view of a region of a cage segment according to a second embodiment of the present disclosure.

[0025] FIG. 6 is a perspective partially exploded view of a rolling-element bearing cage segment according to a third embodiment of the present disclosure.

[0026] FIG. 7 is a perspective view of a portion of a rolling-element bearing cage that includes a plurality of the rolling-element bearing cages segments of FIG. 1.

DETAILED DESCRIPTION

[0027] In the following, identical or functionally equivalent elements are designated by the same reference numbers.

[0028] With respect to FIGS. 1 to 3, a cage segment 1 is shown according to a first embodiment. FIG. 1 shows a plan view of the cage segment 1, FIG. 2 shows a section along the line A-A, and FIG. 3 shows a perspective exploded view of the cage segment of FIG. 1.

[0029] The cage segment 1 comprises four side elements 4-1, 4-2, 4-3, 4-4 that together form a pocket-shaped receptacle 2 that is configured to receive at least one rolling element. Here the side elements 4-1, 4-2, 4-3, 4-4 are manufactured from a semi-finished profile, which is preferably manufactured from metal, in particular from light metal, for example, aluminum, and which may comprise bar stock.

[0030] In the embodiment shown in FIGS. 1 to 3, the side elements 4-1, 4-2, 4-3, 4-4 each have the same shape, having a substantially rectangular cross-section, including two long sides 6 and two short sides 8. Alternatively side elements 4 can also be used that have a different cross-sectional shape, such as, for example, a square shape, a triangular shape, etc.

[0031] Furthermore, at least one surface of the side element 4 is provided with at least one longitudinally extending opening 10, wherein the opening is configured as a channel so that an element is insertable into the opening. Furthermore, the opening is narrowed toward the surface and is wider toward the base of the opening. In particular, two longitudinally extending openings 10-1, 10-2 are provided on a surface of a respective side element 4-1, 4-2, 4-3, 4-4. Alternatively, however, side elements 4-1, 4-2, 4-3, 4-4 made of a semi-finished profile can also be used that have more or fewer longitudinally extending openings 10.

[0032] The respective side elements 4-1, 4-2, 4-3, 4-4 are connected via corresponding connecting elements 12 (FIG. 3) in order to form the pocket-shaped receptacle 2. Here the connecting elements 12 are configured to be insertable in at least one of the longitudinally extending openings 10 and to be attached to the respective side elements 4 using an attachment means (not shown). Depending on the requirements for the cage segment 1, the attachment means can be an interference-fit, a friction-fit, or a material-bonded connection. Furthermore, the connecting elements 12 can be configured to connect two side elements 4 made of semi-finished profile at an essentially right angle, for example, when the rolling element to be received is a cylindrical roller, or at an angle different from 90 degrees, for example, when the rolling element to be received is a tapered roller.

[0033] Furthermore, two retaining elements 14 for rolling elements are provided on the side elements 4-1 and 4-3 on the side facing into the receptacle 2, and two retaining elements 14 are provided on the side facing away from the receptacle 2. The retaining elements 14 are configured to hold a rolling element in the receptacle. Here the retaining elements 14 are manufactured from the same material as the side elements 4-1 to 4-4. Alternatively, however, the retaining elements 14 can also be manufactured from another material, such as, for example, plastic. In addition, the retaining elements 14 can be provided with a surface pattern or texture in order to better retain lubricant, for example, so that lubrication of the rolling elements can be improved.

[0034] FIG. 4 shows a possibility for how the retaining element 14 can be attached to the element 4. For this purpose projections or ribs of the retaining elements 14 are pushed into at least one of the longitudinally extending openings 10 provided on the corresponding surface of the respective side element 4-1, 4-2, 4-3, 4-4, wherein a spacer 16 is inserted between the respective retaining elements 14 and between the connecting elements 12 and the retaining elements 14. This makes it possible to use the connecting elements 12 in order to clamp the retaining elements 14 via the spacers 16, and thereby hold them in position. By changing the positioning of the retaining element 14 on the respective side element 4-1, 4-3, an end clearance in the bearing, which can arise, for example, due to a tolerance addition, can be compensated for by displacing the retaining element 14 in the axial direction, i.e., toward the side elements 4-2, 4-4. This can be achieved, for example, by spacers 16 having different lengths.

[0035] FIG. 5 shows a perspective of a detail of a cage segment 1 according to a second embodiment. The cage segment of FIG. 5 differs from the cage segment 1 of FIGS. 1 to 4 by an angularly designed connecting element 12, which, in contrast to the connecting element that can be seen in FIG. 3, is not pushed into the longitudinally extending opening 10, but rather can be screwed on from outside onto the ends of the elements 4 (possibly into the longitudinally extending openings 10) in order to form the cage segment 1.

[0036] FIG. 6 shows a further embodiment of the cage segment 1. In the cage segment 1 shown in FIG. 6, the retaining elements 14 are attached, in particular releasably, to the side element 4 using a screw 18. It can thereby advantageously be made possible to remove the retaining elements 14 for maintenance or to easily exchange them during the maintenance in case of wear.

[0037] In FIGS. 1 to 6 described above, retaining elements 14 are respectively shown as examples of elements that can be attached to the side elements 4. However, the disclosure is not limited to retaining elements for rolling elements. It is also possible to attach other types of elements to the cage segment 1 using the attachment possibilities described. For example, an element can be attached that is suitable to serve as a guide element for the cage segment. For this purpose such a guide element can be configured, for example, to interact with a rolling element, a bearing raceway, and/or a guide flange in order to guide the cage segment. Depending on the function of the attached element, it can be attached to the cage segment at a corresponding position. For example, the element can be attached to a surface of the side element 4 facing the receptacle 2, and/or a surface of the side element 4 facing away from the receptacle 2, as is shown in FIGS. 1 to 6 for a retaining element. Furthermore, the element can also be attached to a surface of the side element facing the raceway and/or the flange. Furthermore, an element can also be provided that is configured as a coupling element and interacts with a coupling means in order to connect the cage segment to at least one further cage segment. A plurality of cage segments, for example, can thereby be connected to a rolling-element bearing cage.

[0038] FIG. 7 shows a perspective view of a section of a rolling-element bearing cage 20 that includes a plurality of bearing cage segments as discussed above. The rolling-element bearing cage 20 can preferably be used in large rolling-element bearings having a diameter of more than 1 meter. The rolling-element bearing cage 20 has a plurality of cage segments 1 as described above and a plurality of retaining elements 14, wherein the retaining elements 14, as is shown, for example, in FIG. 1, are attached both to a surface of the side element 4 facing into the receptacle 2 and to a surface of the side element 4 facing away from the receptacle 2. Therefore in the rolling-element bearing cage 20, every second rolling element 22 is guided in a receptacle 2 of the cage segment 1, while the other half of the rolling elements 22 are respectively guided between two adjacent cage segments 1. Alternatively a cage segment can also be provided for each rolling element. The rolling elements 22 roll on an inner raceway 26 of an inner ring 24 and on the outer raceway of an outer ring (not shown) of a rolling-element bearing, in order to make possible a relative rotation of the inner ring and of the outer ring.

[0039] The use of semi-finished profiles or bar stock for manufacturing the cage segment 1 makes possible the rapid and cost-effective provision of a rolling-element bearing cage since semi-finished profiles can be easily and cost-effectively acquired by the meter, and can be cut to a desired dimension. A complex machine processing, such as, for example cutting and bending, and in particular a machining process method, can thereby be avoided. The cage segment 1 can thereby be manufactured with a small material use and/or a high degree of material utilization, and thus cost-effectively, in particular even in small quantities.

[0040] The use of semi-finished profiles also has the advantage that the individual elements 4, 14 from which the cage element 1 is assembled are standardizable, in particular in the manner in which they are connectable to one another, so that the cage segment is easily adaptable for various applications. This also makes it possible to provide a modular principle for cage segments 1, from which each cage segment 1 can be individually assembled. This is advantageous in particular with small quantities. In addition, due to the use of a modular principle for cage segments 1, a time that is required up to market readiness of a cage segment 1 of a rolling-element bearing cage 20 and/or of a rolling-element bearing can be reduced.

[0041] Representative, non-limiting examples of the present invention were described above in detail with reference to the attached drawings. This detailed description is merely intended to teach a person of skill in the art further details for practicing preferred aspects of the present teachings and is not intended to limit the scope of the invention. Furthermore, each of the additional features and teachings disclosed above may be utilized separately or in conjunction with other features and teachings to provide improved bearing cage segments.

[0042] Moreover, combinations of features and steps disclosed in the above detailed description may not be necessary to practice the invention in the broadest sense, and are instead taught merely to particularly describe representative examples of the invention. Furthermore, various features of the above-described representative examples, as well as the various independent and dependent claims below, may be combined in ways that are not specifically and explicitly enumerated in order to provide additional useful embodiments of the present teachings.

[0043] All features disclosed in the description and/or the claims are intended to be disclosed separately and independently from each other for the purpose of original written disclosure, as well as for the purpose of restricting the claimed subject matter, independent of the compositions of the features in the embodiments and/or the claims. In addition, all value ranges or indications of groups of entities are intended to disclose every possible intermediate value or intermediate entity for the purpose of original written disclosure, as well as for the purpose of restricting the claimed subject matter.

REFERENCE NUMBER LIST

[0044] 1 Cage segment [0045] 2 Receptacle [0046] 4 Element [0047] 6 Long side [0048] 8 Short side [0049] 10 Opening [0050] 12 Connecting element [0051] 14 Retaining element [0052] 16 Spacer [0053] 18 Screw [0054] 20 Rolling-element bearing cage [0055] 22 Rolling element [0056] 24 Inner ring [0057] 26 Inner raceway