NOISE, VIBRATION, AND HARMONICS REDUCING SPROCKET TECHNOLOGY

• US 20160003340A1
• Filed: 02/18/2014
• Published: 01/07/2016
• Est. Priority Date: 03/01/2013
• Status: Active Grant

• Current Assignee: BorgWarner Incorporated
• Original Assignee: BorgWarner Incorporated
• Inventors: CRUMP, Matthew W., SARICK, John
• Granted Patent: US 10,309,514 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F16H 2055/306 with means providing resilience or vibration damping in chain sprocket wheels
• CPC Class Codes: F16H 55/30 Chain-wheels

Abstract

A number of variations may include a sprocket using one or more slot(s) and/or compressive or elastic material in order to lower the NVH. A number of variations may include a sprocket which isolates the vibrations created by the impact of the chain with the sprocket so that the vibrations are prevented from traveling into the shaft.

Claims

1. A product comprising:

a sprocket having a plurality of teeth formed along the perimeter of a sprocket body;

the plurality of teeth separated by a plurality of roots along the perimeter of the sprocket body;

the sprocket body having a bore formed in the center thereof;

a radial slot formed there through.

2. The product of claim 1 further comprising a compressive or elastic material inserted into the radial slot.

3. The product of claim 1 further comprising a first and second hub attached to the sprocket.

4. The product of claim 3 further comprising a first and second cushion ring attached to the sprocket body.

5. A product comprising:

a sprocket having a plurality of teeth formed along the perimeter of a sprocket body;

the plurality of teeth separated by a plurality of roots along the perimeter of the sprocket body;

the sprocket body having a bore formed in the center thereof;

a first isolation disk and a second isolation disk attached to the sprocket body;

a first hub and a second hub connected to the sprocket body.

6. The product of claim 5 wherein the sprocket is attached to the first and second isolation disk and the first and second hub with a mechanical fastener.

7. The product of claim 6 wherein the mechanical fastener is surrounded by an isolation ring.

8. The product of claim 5 wherein the first and second isolation disks incorporate a cushion ring.

9. The product of claim 5 wherein the bore diameter is larger than the first and second hub diameters.

10. A product comprising:

a sprocket having a plurality of teeth formed along the perimeter of the sprocket body;

the plurality of teeth separated by a plurality of roots along the perimeter of the sprocket body;

the sprocket body having a bore formed in the center thereof;

an isolation material separating a bore hub from a tooth row hub.

11. The product in claim 10 wherein the isolation material separating the bore hub from the tooth row hub is in a spline type pattern.

12. The product in claim 11 wherein a first hub and a second hub are attached to the tooth row hub and the bore hub.

13. The product in claim 12 wherein an isolation material is used to create a cushion ring attached to the perimeter of the first hub and the second hub.

14. A product comprising:

a sprocket having a plurality of teeth formed along the perimeter of a sprocket body;

the plurality of teeth wherein adjacent teeth are separated a root along the perimeter of the sprocket body;

one of the teeth or the root having an axial slot formed there through, and a compressible or elastic material in the axial slot.

15. A product as set forth in claim 14 wherein the axial slot begins at an outer perimeter of the one of the teeth or the root, and wherein the compressible or elastic material extends to the outer perimeter of the one of the teeth or the root.