Bearing cage for a rolling-element bearing
First and second bearing cage halves each having an annular base body and a plurality of pins extending from the base body and a plurality of pin receptacles, the first and second cage haves forming a bearing cage when the pins are received into the pin receptacles. A body of sacrificial material is located on the pins and/or in the pin receptacles which body is configured to be melted ultrasonically to join the first cage half to the second cage half and form the bearing cage.
1. A pair of components comprising:
a first cage half and a second cage half configured to be ultrasonically welded to the first cage half to form a bearing cage for a rolling-element bearing,
the first cage half and the second cage half each comprising an annular base body, a plurality of pins extending axially from the annular base body, and a plurality of pin receptacles complementary to the plurality of pins,
wherein the plurality of pins of the first cage half are configured to extend into the plurality of pin receptacles of the second cage half and the plurality of pins of the second cage half are configured to extend into the plurality of pin receptacles of the first cage half to form bearing cage bridges and pockets configured to receive a rolling element,
wherein the pins of the first cage half and/or the pins of the second cage half and/or the pin receptacles of the first cage half and/or the pin receptacle of the second cage half include a body of sacrificial material configured to be ultrasonically melted to connect the first cage half to the second cage half to form the bearing cage,
wherein the plurality of pins of the first cage half each include an axial end wall,
wherein the plurality of pin receptacles of the second cage half each include an axial end wall, and
wherein the bodies of sacrificial material are located axially between the axial end walls of the pins of the first cage half and the axial end walls of the pin receptacles of the second cage half when the plurality of pins of the first cage half are located in the plurality of pin receptacles of the second cage half.
2. The pair of components according to claim 1 , wherein the first cage half is configured identically to the second cage half.
3. The pair of components according to claim 1 , wherein each pin receptacle includes a radially outer, axially extending ring section configured to radially outwardly support each pin in the each pin receptacle.
4. The pair of components according to claim 3 , wherein the axially extending ring section is formed from the annular base body of the cage half.
5. The pair of components according to claim 3 , wherein each pin includes a radially outer step that interacts with the ring section of the pin receptacle such that the cage bridges formed by the each pin and the each pin receptacle have a homogeneous outer surface.
6. The pair of components according to claim 1 , wherein each pocket has a toroidal geometry comprising a radially inner spherical portion and a radially outer cylindrical portion.
7. The pair of components according to claim 1 , wherein the first cage half and the second cage half are each manufactured from a material selected from a group consisting of PEEK and PA4.6, and PA6.6, the material having a carbon fiber content of 15%-30% or a glass fiber content of 15%-30%.
8. The pair of components according to claim 1 , wherein the sacrificial material is wedge-shaped, pyramid-shaped, or conical.
9. The pair of components according to claim 1 , wherein the first cage half includes at least one primary contact surface that abuts against a secondary contact surface of the second cage half in order to conduct ultrasound into the contact surfaces and/or into the sacrificial material.
10. The pair of components according to claim 1 , wherein the first cage half and/or the second cage half includes a secondary contact surface that opposes a primary contact surface and is configured to conduct ultrasound into the primary contact surfaces and/or into the sacrificial material.
11. The pair of components according to claim 10 , wherein the first cage half and/or the second cage half includes a wedge-shaped portion configured to conduct ultrasound from the secondary contact surface to the primary contact surfaces.
12. The pair of components according to claim 1 , wherein each pin receptacle includes a portion configured to radially overlie a portion of each pin when the each pin is inserted into the each pin receptacle.
13. The pair of components according to claim 1 ,
wherein each of the pins of the first cage half has a hollow interior delimited at one axial end by the axial end wall of the each pin, the hollow interiors being axially open at an axially outer edge of the first cage half.
14. The pair of components according to claim 13 , wherein each pin receptacle of the second cage half includes an axially extending support wall configured to radially overlie the axial end wall of the pin received in the each pin receptacle.
15. A bearing cage comprising a pair of components according to claim 13 ultrasonically welded together.
16. A bearing cage comprising a pair of components according to claim 1 ultrasonically welded together.
17. An ultrasonic welding device including a retaining device having a negative shape of an opening on an axial side of the first cage half according to claim 1 , the welding device being configured to apply ultrasound to the first cage half to weld the first cage half to the second cage half to form the bearing cage.