Polygon compensation coupling for chain and sprocket driven systems

Patent metadata

Field	Value
Publication number	US-10647548-B2
Application number	US-201715398105-A
Country	US
Kind code	B2
Filing date	Jan 4, 2017
Priority date	May 23, 2011
Publication date	May 12, 2020
Grant date	May 12, 2020

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.

First claim

What is claimed is:

1. 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 compensation curve to reduce a polygon effect;
wherein each of the first engagement surface and the second engagement surface comprises a linear slot.

2. The polygon compensation coupling system of claim 1 wherein the coupling element is a roller.

3. The polygon compensation coupling system of claim 1 , wherein the main drive chain sprocket and the chain sprocket are mounted to a main drive shaft for rotation.

4. The polygon compensation coupling system of claim 1 , wherein the chain sprocket and the main drive chain sprocket rotate with constant average angular velocity.

5. The polygon compensation coupling system of claim 1 , wherein the chain sprocket and the main drive chain sprocket rotate with non-constant instantaneous angular velocities.

6. The polygon compensation coupling system of claim 1 , wherein the chain sprocket and the main drive chain sprocket have non-constant instantaneous angular velocities while maintaining constant average angular velocities.

7. The polygon compensation coupling system of claim 6 , wherein the non-constant instantaneous angular velocities of the main drive chain sprocket and the chain sprocket causes a linear speed of a chain to be kept substantially constant.

8. The polygon compensation coupling system of claim 1 , wherein the main drive chain sprocket is driven substantially directly by way of gears, axles, and/or motors.

9. 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 compensation curve to reduce a polygon effect;
wherein each of the first engagement surface and the second engagement surface comprises a linear slot.

10. The passenger conveyor system of claim 9 , wherein the step chain moves with a constant linear speed.

11. The passenger conveyor system of claim 10 wherein the coupling element is a roller.

12. The passenger conveyor system of claim 9 , wherein the main drive chain sprocket comprises a first main drive sprocket and a second main drive sprocket, the first and the second main drive chain sprockets sandwiching the step chain sprocket.

Assignees

• Otis Elevator Co

Inventors

• Srb-Gaffron Walter
• Turek Alexander

Classifications

• B66B23/022 Primary

  with polygon effect reduction means · CPC title

• F16H7/12

  of an idle pulley · CPC title

• F16H2007/0859

  Check valves · CPC title

• F16H7/20

  Mountings for rollers or pulleys · CPC title

• F16H7/1227

  of the viscous friction type, e.g. viscous fluid · CPC title