Roller thrust bearing
AssigneeNtn Corporation
InventorsKenji Tamada, Kikuo Maeda, Tomoaki Kawamura, Hirokazu Nakashima, Takumi Fujita, Mitsuo Sasabe
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Abstract
There is provided a roller thrust bearing providing reduced differential slip, free of significant friction and wear, and providing increased longevity against flaking. The present invention provides a thrust bearing in the form of a roller thrust bearing including at least two radially arranged rows of rollers and a cage holding the rollers, the rollers including at least one roller crowned.
Claims20
A roller thrust bearing comprising at least two radially arranged rows of rollers and a cage holding said rollers, at least one of said rollers being crowned, wherein
- rollers of a radially outer row have a larger effective length than rollers of a radially innermost row.
A roller thrust bearing comprising a crowned roller and a roller bearing ring contacting said roller, said roller bearing ring containing no less than 10,000 to less than 40,000 grains/mm2 of carbide at least to a depth of 0.1 mm, as measured from a surface layer thereof, said grain having a diameter size of no less than 0.6 μm.
In an inclined-plate compressor having an inclined plate secured to and rotated around a main shaft to reciprocate a piston, a roller thrust bearing provided at a portion contacting said inclined plate to receive a thrust load introduced as the main shaft rotates and the piston reciprocates, said bearing comprising:
- a crowned roller;
- and
- a roller bearing ring contacting said roller, said roller bearing ring containing no less than 10,000 to less than 40,000 grains/mm2 of carbide at least to a depth of 0.1 mm, as measured from a surface layer thereof, said grain having a diameter size of no less than 0.6 μm.
Dependencies are inferred from the claim text.