Measuring and testing – Inspecting
Patent
1997-11-17
1999-03-30
Noori, Max H.
Measuring and testing
Inspecting
73593, G01M 1900
Patent
active
058892184
ABSTRACT:
In the ball bearing inspection apparatus and method, the butting portion 7c of a skew drive shaft 7 rotatable coaxially with a spindle rotary shaft 1 is butted against steel balls 3 which are respectively held between the respective grooves of the inner ring 4b and outer ring 4a of a ball bearing 4 to be inspected, the spindle rotary shaft 1 is rotated while applying a pre-load to the outer ring 4a by a pre-load ring 5, and the skew drive shaft 7 is rotated while controlling the rotation speed of the skew drive shaft 7 in such a manner that the respective steel balls 3, which are being rotated on their own axes and around the spindle rotary shaft 1 due to the rotation of the spindle rotary shaft 1, is caused to make a skew movement due to the butting portion 7c. Therefore, physical quantities such as vibrations, sound pressures and the like generated from the ball bearing 4 to be inspected are measured in a condition that the respective balls 3 are making their respective skew movements in addition to their rotational movements on their own axes and around the spindle rotary shaft 1.
REFERENCES:
patent: 4551677 (1985-11-01), Bankston
patent: 4729239 (1988-03-01), Gordon
patent: 5565623 (1996-10-01), Philpott et al.
Matsuzaki Hiroyuki
Sato Chuichi
Noori Max H.
NSK Ltd.
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