Rolling-element bearing transmission
AssigneeAktiebolaget Skf
InventorsIngo Schulz, Bernd Stephan
Life of this patent
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Abstract
A rolling-element bearing transmission includes a rotor configured to rotate a shaft relative to a stator and a rotatable output ring that includes a first rolled-on surface element. The shaft includes at least one second rolled-on surface element, and the stator includes a third rolled-on surface element. First and second pluralities of rolling elements are located between the shaft and the stator and between the shaft and the output ring. Also, a transmission mechanism transmits a rotary motion of the shaft to the output ring with a speed reduction such that the output ring rotates at a lower speed than the shaft.
Claims13
A rolling-element bearing transmission, comprising:
- a rotor configured to rotate a shaft relative to a stator;
- and
- a rotatable output ring comprising a first rolled-on surface element;
- the shaft comprising at least one second rolled-on surface element;
- and
- the stator comprising a third rolled-on surface element;
- the rolling-element bearing transmission further including:
- a first plurality of rolling elements between the first rolled-on surface element and the at least one second rolled-on surface element and a second plurality of rolling elements between the third rolled-on surface element and the at least one second rolled-on surface element;
- and
- transmission means for transmitting a rotary motion of the shaft to the output ring with a speed reduction such that the output ring rotates at a lower speed than the shaft,
- wherein a bearing formed by the first plurality of rolling elements, the first rolled-on surface element and the at least one second rolled-on surface element is the only bearing acting on the output ring.
A rolling-element bearing transmission comprising:
- a rotor configured to rotate a shaft relative to a stator;
- a rotatable output ring comprising a first rolled-on surface element, the output ring comprising an internal gear;
- the shaft comprising a first second rolled-on surface element and a second second rolled-on surface element axially spaced from the first second rolled-on surface element by a gap;
- the stator comprising a third roiled-on surface element and comprising an internal gear;
- a first plurality of rolling elements between the first rolled-on surface element and the first second rolled-on surface element and a second plurality of rolling elements between the third rolled-on surface element and the second second rolled-on surface element;
- a plurality of double gears each comprising a first gear having teeth and a first diameter and a second gear having teeth and a second diameter larger than the first diameter, the first gear and second gear of each double gear being fixedly mounted to a shaft for rotation with the shaft, the shaft connecting the first second rolled-on surface element to the second second rolled-on surface element and the teeth of the first gear of each double gear being meshed with the internal gear of the stator and the teeth of the second gear of each double gear being meshed with the internal teeth of the output ring;
- wherein a bearing formed by the first plurality of rolling elements, the first rolled-on surface element and the at least one second rolled-on surface element is the only bearing acting on the output ring.
Dependencies are inferred from the claim text.