摘要:
A tapered roller bearing comprises an outer ring (32), an inner ring (33), a plurality of tapered rollers (34) arranged between the outer ring (32) and the inner ring (33), and a plurality of retainer segments (11a) having pockets for holding the tapered rollers (34) and arranged so as to be continuously lined with each other in a circumferential direction between the outer ring (32) and the inner ring (33). Here, the tapered roller (34) is arranged between two adjacent retainer segments (11b) and (11c) except for between the first retainer segment (11a) and the last retainer segment lined continuously with each other in the circumferential direction.
摘要:
A rolling bearing (11) comprises a plurality of rollers, and retainer segments (15a) retaining the rollers and split along a split line extending in an axial direction. The retainer segment (15a) has a plurality of pillar parts (22a), (22b), (22c) and (22d) extending in the axial direction so as to form first pockets (23a) and (23c) and a second pocket (23b) for housing the rollers, and a connection part extending in a circumferential direction so as to connect the plurality of pillar parts (22a) to (22d). Here, outer diameter side stopper parts (24a), (24b), (24c) and (24d) are provided on the outer diameter side of the pillar parts (22a) to (22d) positioned on the circumferential both sides of the first pockets (23a) and (23c) to limit the movement of the roller housed in the first pockets (23a) and (23c) toward the outer diameter side, and inner diameter side roller stopper parts (25a) and (25b) are provided on the inner diameter side of the pillar parts (22b) and (22c) positioned on the circumferential both sides of the second pocket (23b) to limit the movement of the roller housed in the second pocket (23b) toward the inner diameter side.
摘要:
A tapered roller bearing comprises an outer ring (32), an inner ring (33), a plurality of tapered rollers (34) arranged between the outer ring (32) and the inner ring (33), and a plurality of retainer segments (11a) having pockets for holding the tapered rollers (34) and arranged so as to be continuously lined with each other in a circumferential direction between the outer ring (32) and the inner ring (33). Here, the tapered roller (34) is arranged between two adjacent retainer segments (11b) and (11c) except for between the first retainer segment (11a) and the last retainer segment lined continuously with each other in the circumferential direction.
摘要:
A rolling bearing (11) comprises a plurality of rollers, and retainer segments (15a) retaining the rollers and split along a split line extending in an axial direction. The retainer segment (15a) has a plurality of pillar parts (22a), (22b), (22c) and (22d) extending in the axial direction so as to form first pockets (23a) and (23c) and a second pocket (23b) for housing the rollers, and a connection part extending in a circumferential direction so as to connect the plurality of pillar parts (22a) to (22d). Here, outer diameter side stopper parts (24a), (24b), (24c) and (24d) are provided on the outer diameter side of the pillar parts (22a) to (22d) positioned on the circumferential both sides of the first pockets (23a) and (23c) to limit the movement of the roller housed in the first pockets (23a) and (23c) toward the outer diameter side, and inner diameter side roller stopper parts (25a) and (25b) are provided on the inner diameter side of the pillar parts (22b) and (22c) positioned on the circumferential both sides of the second pocket (23b) to limit the movement of the roller housed in the second pocket (23b) toward the inner diameter side.
摘要:
A novel chiral unsymmetric diphosphine compound of formula (I): ##STR1## wherein Ar.sup.1 and Ar.sup.2, which are different from each other, each represent a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a pyridyl group, a quinolyl group, an isoquinolyl group, a furfuryl group, a benzofurfuryl group, a thienyl group, or a benzothienyl group, and a transition metal complex containing the diphosphine compound as a ligand. The complex catalyzes various asymmetric synthesis reactions, e.g., asymmetric hydrogenation or asymmetric hydrosilylation, exhibiting excellent performance in selectivity, conversion and catalytic activity, to provide a product of desired absolute configuration at high optical purity and in high yield.