| 主权项 |
1. A ball bearing, comprising:
an outer ring (50), having a first outer raceway (50A) and a second outer raceway (50B) each being defined by a portion of a radially inward facing surface (56) of the outer ring (50), the first outer raceway (50A) and the second outer raceway (50B) each having an arcuate cross section; an inner ring (52) disposed within the outer ring (50) and having a first inner raceway (52A) and a second inner raceway (52B) each being defined by a radially outward facing surface (58) of the inner ring (52) the first inner raceway (52A) and the second inner raceway (52B) each having an arcuate cross section; and a first plurality of balls disposed partially in the first inner raceway (52A) and the first outer raceway (50A), a second plurality of balls disposed partially in the second inner raceway (52B) and the second outer raceway (50B), the first plurality of balls and the second plurality of balls each including load bearing balls (64) and spacer balls (66), each of the spacer balls (66) of the first plurality of balls engages two adjacent load bearing balls (64) to prevent skidding of the load bearing balls (64) relative to the first outer raceway (50A) and the first inner raceway (52A), when the outer ring (50) is rotationally accelerated relative to the inner ring (52), each of the spacer balls (66) of the second plurality of balls engages two adjacent load bearing balls (64) to prevent skidding of the load bearing balls (64) relative to the second outer raceway (50B) and the second inner raceway (52B), when the outer ring (50) is rotationally accelerated relative to the inner ring (52); each of the load bearing balls (64) of the first plurality of balls having a first single point of contact (75A) with the first outer raceway (50A) and a second single point of contact (78A) with the first inner raceway (52A), the first single point of contact (75A) and the second single point of contact (78A) defining a first line of contact (L1); each of the load bearing balls (64) of the second plurality of balls having a third single point of contact (75B) with the second outer raceway (50B) and a fourth single point of contact (78B) with the second inner raceway (52B), the third single point of contact (75B) and the fourth single point of contact (78B) defining a second line of contact (L2); the first line of contact (L1) and the second line of contact (L2) having a point of intersection (X) at a point radially away from the outer ring (50), thereby defining a back-to-back configuration of the first outer raceway (50A) and the second outer raceway (50B) in the outer ring (50); and the load bearing balls (64) being preloaded between the outer ring (50) and the inner ring (52) at predetermined force. |
