Bearing with integrated shunt

Patent metadata

Field	Value
Publication number	US-10190640-B2
Application number	US-201715467353-A
Country	US
Kind code	B2
Filing date	Mar 23, 2017
Priority date	Mar 23, 2016
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

A bearing assembly having an inner ring, outer ring, and a plurality of rolling elements and an integrated electrically conductive element, such as an electrical shunt system manufactured of bundled or braided conductive filaments.
The bearing integrated electrical shunt system consists of a fixed ring and an integrated electrically conductive element, such as bundled carbon fiber filaments, that contact a rotating ring. The integrated electrical conductive element can be integrated with the bearing seal.

First claim

What we claim is:

1. A bearing comprising:
an outer ring having a first raceway;
an inner ring having a second raceway;
rolling elements disposed between the first and second raceways; and
a closure element fixedly assembled to one of the inner ring or outer ring and extending in a direction of the other of the inner ring or the outer ring, the closure element having:
at least one conductive filament having a first end, a second end, and an intermediate portion positioned between the first end and the second end,
the at least one conductive filament assembled to the closure element, the first end contacting the outer ring, the intermediate portion contacting the inner ring to form an electrically conductive path between the outer ring and the inner ring, and the second end positioned away from the inner ring and fixed to the closure element.

2. The bearing of claim 1 , wherein the at least one conductive filament is a bundle of filaments bound together at least at one of the first end or the second end.

3. The bearing of claim 2 , wherein the bundle of filaments is braided.

4. The bearing of claim 1 , wherein the closure element includes a second conductive filament.

5. The bearing of claim 1 , wherein the at least one conductive filament is made of carbon fiber.

6. The bearing of claim 1 , wherein the closure element is a polymer seal and the at least one conductive filament is at least partially mechanically attached to the seal.

7. The bearing of claim 1 , wherein the at least one conductive filament contacts the outer ring along an outer length of the at least one conductive filament.

8. The bearing of claim 1 , wherein an impedance of the closure element is less than an impedance of the bearing rolling elements.

Assignees

• Schaeffler Technologies Ag

Inventors

• Hutchison Chris
• White Michael

Classifications

• F16C2202/32

  Conductivity · CPC title

• F16C33/58

  Raceways; Race rings · CPC title

• F16C2380/27

  Motor coupled with a gear, e.g. worm gears · CPC title

• F16C33/583

  Details of specific parts of races · CPC title

• F16C19/06

  with a single row or balls · CPC title