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US 7,841,773 B2Granted
Tapered roller bearing
AssigneeNtn Corporation
InventorsYuuji Okamoto, Takashi Tsujimoto, Jiro Mochizuki, Yasuhiro Kanbori
Life of this patent
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AssigneeNtn Corporation
InventorsYuuji Okamoto, Takashi Tsujimoto, Jiro Mochizuki, Yasuhiro Kanbori
Estimating the term…
A tapered roller bearing comprises an inner ring having a conical surface-like raceway surface in it outer periphery and formed with a cone back face rib and a cone front face rib on the opposite sides of the raceway, an outer ring having a conical surface-like raceway in its inner periphery, a plurality of tapered rollers interposed between the raceways of the inner and outer rings, and a cage for holding the tapered rollers in predetermined circumferential intervals, wherein the ratio R/RBASE of the radius of curvature R of the large end face (32) of the tapered roller (30) to the distance RBASE from the apex of cone of the tapered roller (30) to the cone back face rib surface (18) of the inner ring (10) is set at 0.75 to 0.87, and the end face deflection of the large end face (32) of the tapered roller (30) is 3 μm or less.
A tapered roller bearing comprising an inner ring having a conical surface-like raceway surface in an outer periphery and formed with a cone back face rib and a cone front face rib on the opposite sides of the raceway, an outer ring having a conical surface-like raceway in an inner periphery, a plurality of tapered rollers interposed between the raceways of the inner and outer rings, and a cage for holding the tapered rollers in predetermined circumferential intervals, wherein a ratio R/RBASE of a radius of curvature R of a large end face of the tapered roller to a distance RBASE from an apex of cone of the tapered roller to a cone back face rib surface of the inner ring is set at 0.75 to 0.87, and wherein an end face deflection of the large end face of the tapered roller is 3 μm or less.
Dependencies are inferred from the claim text.