Abstract

A thrust ball bearing retainer a large size of bearings with the bearing raceways being modified using a surface enhancement process such as hard anodizing coating, which provides low friction coefficient and initial wear rate. The retainer material is selected to be molded, synthetic resin, self-lubricated material reinforced with carbon fiber, molybdenum disulfide, and PTPE. This lubrication system eliminates the thermal induced bearing torque effect due to viscosity. The retainer contains multiply segments with an inner race guided configuration, an alternative ball pocket cross section design and a ball pocket slotted configuration to reduce the thermal induced effects due to coefficient of thermal expansion mismatch between the raceway and the retainer material (2) to enhance the producibility of the retainer due to out-of-round, out-of-flatness and torsional wrap, and (3) to reduce the manufacturing cost. The pocket design with an oval cross section instead of a circular cross section also reduces the localized thermal induced effect which would otherwise result in a pinching condition between the ball and the retainer. The alternative slotted retainer pocket design is used to increase the compliance between ball/pocket interfaces, which helps to reduce the dynamic induced effects. The ends of the retainer segments are designed to reduce the interactive transferring, circumferential force between two adjacent segments.

IPC Classes  ?

• F16C 33/38 - Ball cages
• F16C 33/66 - Special parts or details in view of lubrication
• F16C 33/44 - Selection of substances
• F16C 19/10 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly

Abstract

2, and PTPE, eliminates the thermal viscosity. Multi-segment retainers, each with an inner race-guided configuration, an alternative ball pocket cross-section design with a slotted configuration, reduce the thermal effects, improve the producibility of the retainer, and reduce the manufacturing cost. The pocket design with an oval cross-section instead of a circular cross-section also reduces the localized thermal-induced effect which would otherwise result in a pinching condition between the ball and the retainer. The alternative slotted retainer pocket design increases the compliance between ball/pocket interfaces, which helps to reduce the dynamic effects. The ends of the retainer segments are designed to reduce the interactive transferring, circumferential force between two adjacent segments.

IPC Classes  ?

• F16C 19/10 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly
• F16C 33/38 - Ball cages
• F16C 33/66 - Special parts or details in view of lubrication
• F16C 33/44 - Selection of substances

Abstract

A bearing for providing rotation of at least one intermediate part relative to a first part and a second part includes a first bearing race formed in the first part, the first bearing race having a raceway corresponding to a first diameter, and a second bearing race and a third bearing race formed in the at least one intermediate part, the second bearing race and third bearing race having a raceway corresponding to a second diameter, wherein the first diameter is different from the second diameter. Further, a fourth bearing race is formed in the second part, the fourth bearing race having a raceway corresponding to the first diameter. A first plurality of roller elements are arranged between the first raceway and the second raceway, and a second plurality of roller elements are arranged between the third raceway and the fourth raceway.

IPC Classes  ?

• F16C 19/54 - Systems consisting of a plurality of bearings with rolling friction
• F16C 19/10 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly
• F16C 43/04 - Assembling rolling contact bearings
• H01Q 1/27 - Adaptation for use in or on movable bodies
• H01Q 1/44 - Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna
• H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart