BEARING HAVING AN INDICATOR

• US 20150233418A1
• Filed: 08/06/2013
• Published: 08/20/2015
• Est. Priority Date: 09/19/2012
• Status: Abandoned Application

• Current Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Inventors: Brehm, Horst, Callies, Daniel
• Application Number:
  US14/428,828
• Publication Number:
  US 20150233418A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F16C 17/24 with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety
• CPC Class Codes: F16C 19/52 with devices affected by abnormal or undesired conditions
• CPC Class Codes: F16C 19/522 related to load on the bearing, e.g. bearings with load sensors or means to protect the bearing against overload
• CPC Class Codes: F16C 19/525 related to temperature and heat, e.g. insulation
• CPC Class Codes: F16C 33/586 outside the space between the races, e.g. end faces or bore of inner ring
• CPC Class Codes: F16C 33/7816 Details of the sealing or parts thereof, e.g. geometry, material
• CPC Class Codes: F16C 41/00 Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
• CPC Class Codes: F16C 41/008 Identification means, e.g. markings, RFID-tags; Data transfer means

Abstract

Bearing, in particular rolling bearing, including, as bearing parts, at least one bearing ring (1, 2), a sealing element or a cage (3). The object of providing a bearing which can easily be retrofitted for subsequent damage analysis and does not necessitate any significant design modifications compared to standard bearings is achieved, according to the invention, for the bearing mentioned in the introduction by an indicator (4, 5, 6, 7) which can be triggered mechanically, in particular by impact and/or mechanical tensile or compressive stress, being arranged on the surface of the body of the bearing part and, when a limit value is reached, has an irreversible, visually ascertainable change.

Claims

1. A bearing, comprising at least one bearing ring, a sealing element or a cage, and an indicator which is triggered mechanically by at least one of jolting, mechanical tensile stress, or compressive stress, arranged on a surface of the at least one bearing ring, the sealing element, or the cage and, when a limit value is reached, has an irreversible change which is detectable visually.

2. The bearing as claimed in claim 1, wherein the indicator carries out a color change when the limit value is reached.

3. The bearing as claimed in claim 1, wherein the indicator comprises a closed volume of a test liquid.

4. The bearing as claimed in claim 1, wherein the indicator comprises a test film.

5. The bearing as claimed in claim 1, wherein the indicator comprises a pressure measuring film.

6. The bearing as claimed in claim 1, further comprising a temperature indicator which, when a critical temperature is reached, carries out a color change which is detected visually.

7. The bearing as claimed in claim 1, wherein the indicator comprises a cracking varnish.

8. The bearing as claimed in claim 3, wherein the test liquid is in a glass tube.