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US 9,746,066 B2Granted
Gearing arrangement
AssigneeRolls-Royce Deutschland Ltd & Co KG
InventorGideon Daniel Venter
Life of this patent
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Abstract
A cylindrical double helix gear having an axis and a unitary gear arrangement extending about the axis, wherein the gear arrangement has two axially spaced gear portions with each gear portion comprising a plurality of gear teeth extending about a radial outer surface of the gear arrangement, wherein the gear portions are connected by a flexible spacer portion configured to allow relative movement between the gear portions.
Claims19
A cylindrical double gear comprising
- a one-piece gear arrangement that is spokeless, the gear arrangement extending about an axis and including (i) a pair of axially spaced gear portions with each gear portion comprising a plurality of gear teeth extending about a radial outer surface of the gear arrangement, and (ii) a cylindrical flexible spacer portion connecting the gear portions,
- wherein the spacer portion has an array of circumferentially spaced links joining each gear portion configured to allow relative movement between the gear portions.
A cylindrical double gear comprising
- a hollow one-piece gear arrangement that is spokeless, the gear arrangement extending about an axis and including (i) a pair of hollow axially spaced gear portions with each gear portion comprising a plurality of gear teeth extending about a radial outer surface of the gear arrangement, and (ii) a hollow cylindrical flexible spacer portion integrally connecting the gear portions,
- wherein the spacer portion has an outer circumference with an array of circumferentially spaced links separated by respective apertures.
A cylindrical double gear comprising
- a hollow one-piece gear arrangement that is spokeless, the gear arrangement extending about an axis and including (i) a pair of axially spaced gear portions with each gear portion comprising a plurality of gear teeth extending about a radial outer surface of the gear arrangement, and (ii) a cylindrical flexible spacer portion connecting the gear portions, wherein:
- the hollow one-piece gear arrangement has an inner surface defining a gear bore;
- the minimum inner radius of the gear arrangement is the largest radius at which a circle drawn about the axis fits within the bore without intersecting the inner surface;
- the maximum outer radius of the gear arrangement is the smallest radius at which a circle drawn about the axis only intersects an outermost surface of the gear teeth;
- and
- the radial distance between the minimum inner radius and the maximum outer radius is less than ⅓rd of the maximum outer radius.
3 more elements
Dependencies are inferred from the claim text.