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Preload measuring apparatus of rolling bearing

  • US 6,286,374 B1
  • Filed: 11/09/1999
  • Issued: 09/11/2001
  • Est. Priority Date: 11/09/1998
  • Status: Expired due to Term
First Claim
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1. A preload measuring apparatus for measuring a preload of a rolling bearing which includes an inner race member, an outer race member, and a plurality of rolling elements rotatably interposed between said inner race member and said outer race member, said preload measuring apparatus comprising:

  • a bearing support member supporting both ends of said inner race member in the axial direction of said rolling bearing;

    a pressurization member loading a predetermined load to one of said both ends of said inner race member in the axial direction through said bearing support member;

    an excitation member applying a vibration to said inner race member in the axial direction while said predetermined load is loaded on said inner race member by said pressurization member;

    a vibration sensor detecting a vibration which is generated on said outer race member and is caused by the vibration of said inner race member; and

    a controller capable of calculating a resonance frequency of said rolling bearing through an output signal of said vibration sensor and also calculating a true preload of said rolling bearing in accordance with the thus calculated resonance frequency, said true preload defining a preload of said rolling bearing before the predetermined load is loaded on said inner race member.

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