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US 2020/0332860 A1Published application
Transmission device
AssigneeVanderbilt University
InventorHarrison L. BARTLETT
Life of this patent
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Abstract
Various implementations include transmission devices for reducing angular speed using a nutating intermediate plate that does not rotate about the central axis of the transmission relative to the transmission housing. Various implementations of the transmission devices are able to achieve high transmission ratios in a single, compact stage while maintaining high efficiency and leverage simple components that can be easily manufactured using standard machining practices.
Claims22
A speed reduction device comprising:
- a housing having an axis of rotation, the housing having a vertical wall;
- a driven plate having an axis of rotation, wherein the axis of rotation of the driven plate is coincident with the axis of rotation of the housing, the driven plate having a first side and a second side spaced apart and opposite each other along the axis of rotation of the driven plate, wherein the driven plate is disposed within the housing;
- a drive plate having an axis of rotation, wherein the axis of rotation of the drive plate intersects the axis of rotation of the driven plate at a precession angle greater than zero, the drive plate having a first side and a second side spaced apart and opposite each other along the axis of rotation of the drive plate, wherein the drive plate is disposed within the housing;
- an intermediate plate having an axis of rotation, wherein the axis of rotation of the intermediate plate intersects the axis of rotation of the driven plate at the precession angle, the intermediate plate having a first side, a second side, and a perimeter edge extending between the first side and the second side, the first and second sides being spaced apart along the axis of rotation of the intermediate plate, wherein the intermediate plate is disposed within the housing between the drive plate and the driven plate;
- and
- at least one angular stop coupling the intermediate plate and the housing, the at least one angular stop preventing the intermediate plate from rotating relative to the housing and allowing the axis of rotation of the intermediate plate to precess about the axis of rotation of the driven plate,
- wherein rotation of the drive plate about the axis of rotation of the driven plate at an angular speed urges the intermediate plate to nutate about the axis of rotation of the driven plate, and the nutation of the intermediate plate causes the driven plate to rotate about the axis of rotation of the driven plate at an angular speed that is less than the angular speed of the drive plate.
4 more elements
Dependencies are inferred from the claim text.