US 4,729,239 AGranted

Vibration tester for ball bearings and associated devices

AssigneeMPB Corporation

InventorKeith M. Gordon

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Abstract

The invention is directed to a miniature ball bearing tester which detects vibrations therefrom when such a bearing is rotated by a rotor. The device includes a base upon which are supported reeds. The reeds support an upper housing tooling which includes a bearing support for mounting a bearing thereon for rotation. A rotor is attachable to a bearing mounted on the upper tooling. The rotor is then driven to rotate the bearing and upon a defect being detected, the reeds are as a result forced to move in a direction radial with respect to the axial direction of the bearing. An accelerometer picks up the movement and the signal therefrom is then band pass filtered, integrated to obtain a velocity measurement and output by, for example, a speaker to detect any frequencies resulting from a flaw in the miniature bearing.

Claims12

Dependent claims

A device for testing ball bearings and associated devices to detect flaws therein by detecting vibrations therefrom when in operation, the device comprising:

a base;
reed support means attached to said base and extending upwardly therefrom, said reed support means for supporting upper housing tooling;
upper housing tooling mounted on said reed support means, said upper housing tooling having means for supporting a bearing thereon for rotational operation thereof and said reed support means, relative to said upper housing tooling, being flexible in a direction radial to the axis of rotation of a bearing mounted on said upper housing tooling;
drive means for rotationally driving a bearing mounted on said upper housing tooling;
detecting means connected to said reed support means for detecting movement of said reed support means in response to a bearing on said upper housing tooling being rotated, which movement is indicative of a defect in the bearing and is radial relative to the bearing being rotated.

2 more elements

Dependencies are inferred from the claim text.