Device for securing balancing weights to a shaft

Patent metadata

Field	Value
Publication number	US-10060505-B2
Application number	US-201615068022-A
Country	US
Kind code	B2
Filing date	Mar 11, 2016
Priority date	Mar 11, 2016
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

A shaft balancing device for insertion into a shaft including a generally flat cylindrical band having an outer surface, an inner surface and a set of two crush points thereon. A balancing weight is attached to the outer surface of the band between the set of crush points. The device is inserted into the shaft and the crush points are plastically deformed radially outward creating spring force which holds the balancing weight to the inner surface of the shaft. The band has a curved connecting portion between the two crush points having a radius of curvature slightly greater than the curvature of the shaft. The balancing weight has a radius of curvature slightly greater than the radius of curvature of the curved connecting portion and slightly less than the radius of curvature of the shaft.

First claim

I claim:

1. A shaft balancing device comprising:
a generally flat cylindrical band having an outer surface, an inner surface, a set of two crush points therein and an outer diameter slightly smaller than the inner diameter of a shaft;
a balancing weight wherein the balancing weight is attached to the outer surface of the band between the two crush points; and
wherein the crush points project radially inward from the inner surface of the band and can be plastically deformed outward.

2. The shaft balancing device of claim 1 , where in the band further comprises a curved connecting portion between the set of two crush points.

3. The shaft balancing device of claim 2 , wherein the balancing weight has a curved inner surface and curved outer surface with a radius of curvature smaller than the radius of curvature of the shaft.

4. The shaft balancing device of claim 1 , wherein the band is made of spring steel.

5. The shaft balancing device of claim 1 , wherein the balancing weight is made of steel.

6. The shaft balancing device of claim 1 , wherein the thickness of the band is less than the thickness of the balancing weight.

7. The shaft balancing device of claim 1 , wherein the balancing weight is attached to the outer surface of the band by welding.

8. The shaft balancing device of claim 1 , further comprising at least one additional balancing weight wherein the additional balancing weight is attached to the outer surface of the band on the curved connecting portion between the crush points.

9. A balanced shaft assembly, comprising a shaft and shaft balancing device including:
a generally flat cylindrical band having an outer surface, an inner surface, a set of two crush points therein and an outer diameter slightly smaller than the inner diameter of a shaft;
a balancing weight wherein the balancing weight is attached to the outer surface of the band between the two crush points;
wherein the crush points project radially inward from the inner surface of the band and can be plastically deformed outward; and
wherein the shaft balancing device is positioned inside the shaft.

Assignees

• Dana Automotive Systems Group
• Dana Automotive Systems Group

Inventors

• Springer Stephen

Classifications

• F16F15/32

  Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels {(suppression of vibrations in rotating systems by using freely rotating masses F16F15/14; compensation of inertia forces F16F15/22; compensating imbalance for testing purposes G01M1/30)} · CPC title

• F16F15/34 Primary

  Fastening arrangements therefor · CPC title

• F16C3/20

  Shape of crankshafts or eccentric-shafts having regard to balancing · CPC title

• F16C3/02

  Shafts; Axles · CPC title

• F16C2326/06

  Drive shafts · CPC title