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US 9,599,201 B2Granted
Polygon compensation coupling for chain and sprocket driven systems
AssigneeOtis Elevator Company
InventorsWalter Srb-Gaffron, Alexander Turek
Life of this patent
Estimating the term…
Abstract
A polygon compensation coupling system for reducing a polygon effect in a chain driven system is disclosed. The polygon compensation coupling system may include a chain sprocket and a main drive in engagement with the chain sprocket, such that the engagement defines a compensation curve to reduce the polygon effect.
Claims12
A polygon compensation coupling system, the system comprising:
- a chain sprocket;
- and
- a main drive chain sprocket in engagement with the chain sprocket, the engagement defined by a compensation curve to reduce a polygon effect;
- wherein the chain sprocket comprises a plurality of compensation holes;
- wherein the main drive chain sprocket comprises a plurality of axles, the main drive chain sprocket is engaged to the chain sprocket through each of the plurality of compensation holes by a respective axle of the plurality of axles, wherein rotation of the main drive chain sprocket causes rotation of each of the respective axles within each of the plurality of compensation holes in accordance with the compensation curve.
2 more elements
A passenger conveyor system, the system comprising:
- a plurality of treads guided by a step chain in an endless loop about a step chain sprocket for transporting objects from one location to another;
- and
- a main drive chain sprocket in engagement with the step chain sprocket, the engagement defined by a compensation curve as the step chain sprocket and the main drive chain sprocket rotate with constant average angular velocities but non-constant instantaneous angular velocities;
- wherein the step chain sprocket comprises a plurality of compensation holes and the main drive chain sprocket comprises a plurality of axles, the main drive chain sprocket is engaged to the step chain sprocket through each of the plurality of compensation holes by a respective axle of the plurality of axles, such that rotation of the main drive chain sprocket causes rotation of each of the respective axle within each of the plurality of compensation holes in accordance with the compensation curve.
1 more element
A method of reducing a polygon effect in a chain driven system, the method comprising:
- providing a chain driven by a chain sprocket and a main drive;
- engaging the chain sprocket with the main drive chain sprocket;
- rotating the chain sprocket and the main drive with constant average angular velocities but non-constant instantaneous angular velocities;
- and
- providing a compensation curve to maintain a substantially constant linear speed of the chain;
- wherein providing the chain sprocket comprises providing the chain sprocket with a plurality of compensation holes and, engaging the chain sprocket with the main drive chain sprocket comprises connecting the main drive chain sprocket to the chain sprocket through the plurality of compensation holes by way of a plurality of axles mounted on the main drive chain sprocket;
- wherein providing the compensation curve further comprises guiding the plurality of axles within the plurality of compensation holes.
4 more elements
Dependencies are inferred from the claim text.