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US 2017/0113902 A1Published application
Polygon compensation coupling for chain and sprocket driven systems
AssigneeOtis Elevator Company
InventorsWalter Srb-Gaffron, Alexander Turek
Life of this patent
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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.
Claims15
A polygon compensation coupling system, the system comprising:
- a chain sprocket;
- and
- a main drive chain sprocket in engagement with the chain sprocket;
- wherein the chain sprocket has a first engagement surface and the main drive chain sprocket has a corresponding second engagement surface;
- and
- a coupling element in the first engagement surface and the second engagement surface to define a stationary compensation curve to reduce a polygon effect.
3 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 chain sprocket;
- wherein the chain sprocket has a first engagement surface and the main drive chain sprocket has a corresponding second engagement surface;
- and
- a coupling element in the first engagement surface and the second engagement surface to define a stationary compensation curve to reduce a polygon effect.
3 more elements
The passenger conveyor system of claim 12 wherein the coupling element is a roller.
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 chain sprocket;
- engaging the chain sprocket with the main drive chain sprocket;
- rotating the chain sprocket and the main drive chain sprocket 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 and the main drive chain sprocket comprises providing each of the chain sprocket and the main drive chain sprocket with a plurality of engagement surfaces and providing the compensation curve comprises providing a stationary curve in which a coupling element slides in corresponding engagement surfaces of the chain sprocket and the main drive chain sprocket.
3 more elements
Dependencies are inferred from the claim text.