JP2001311426A5 - - Google Patents

Claims (8)

  In a multi-stage thrust bearing disposed between a shaft and a housing, each of a plurality of inner rings attached to the shaft, a plurality of outer rings attached to the housing, the inner ring, and the outer ring adjacent thereto A rolling element disposed; an inner ring spacer disposed between the plurality of inner rings; and an outer ring spacer disposed between the plurality of outer rings, the shaft and the inner ring spacer, or the housing. The axial thickness of one bearing ring sandwiched between the outer ring spacer and the outer ring spacer is thinner than the axial thickness of the other bearing ring facing the one bearing ring via the rolling element. Multi-stage thrust bearing.   In a multi-stage thrust bearing disposed between a shaft and a housing, each of a plurality of inner rings attached to the shaft, a plurality of outer rings attached to the housing, the inner ring, and the outer ring adjacent thereto A rolling element to be disposed; an inner ring spacer disposed between the plurality of inner rings; and an outer ring spacer disposed between the plurality of outer rings; and an inner peripheral surface of the inner ring and / or the outer ring. A multi-stage thrust bearing in which a flank that allows inclination of the inner ring and / or outer ring is formed on at least a part of the outer peripheral surface of the inner ring.   The multistage thrust bearing according to claim 1 or 2, wherein a thickness ratio between one outer ring and one inner ring and a thickness ratio between another inner ring and another outer ring are 1.2 to 2.1, respectively. . The thickness on the inner peripheral surface side of the inner ring is l ₁ , the axial dimension of the tapered surface provided on the inner peripheral surface of the inner ring is l ₂ , the thickness on the outer peripheral surface side of the outer ring is l ₃ , When the axial dimension of the tapered surface provided on the outer peripheral surface of the outer ring is l ₄ , if the clearance between the outer ring and the housing is larger than the clearance between the inner ring and the shaft, l ₂ / l ₁ ≦ l ₃ / The multistage thrust bearing according to claim 1, wherein the multistage thrust bearing is l ₄ .   The taper angle of the tapered surface on the inner ring side is made equal to or larger than the taper angle of the tapered surface on the outer ring side when the clearance between the outer ring and the housing is larger than the clearance between the inner ring and the shaft. The multistage thrust bearing according to any one of 4. The thickness on the inner peripheral surface side of the inner ring is l ₁ , the axial dimension of the tapered surface provided on the inner peripheral surface of the inner ring is l ₂ , the thickness on the outer peripheral surface side of the outer ring is l ₃ , When the axial dimension of the tapered surface provided on the outer peripheral surface of the outer ring is l ₄ , if the clearance between the outer ring and the housing is smaller than the clearance between the inner ring and the shaft, l ₂ / l ₁ ≧ l ₃ / The multistage thrust bearing according to claim 1, wherein the multistage thrust bearing is l ₄ .   The taper angle of the tapered surface on the outer ring side is made equal to or greater than the taper angle of the tapered surface on the inner ring side when the clearance between the outer ring and the housing is smaller than the clearance between the inner ring and the shaft. The multistage thrust bearing according to any one of 3 and 6.   In a multi-stage thrust bearing disposed between a shaft and a housing, each of a plurality of inner rings attached to the shaft, a plurality of outer rings attached to the housing, the inner ring, and the outer ring adjacent thereto A rolling element disposed; an inner ring spacer disposed between the plurality of inner rings; and an outer ring spacer disposed between the plurality of outer rings, the shaft and the inner ring spacer, or the housing. The axial thickness of one bearing ring sandwiched between the outer ring spacer and the outer ring spacer is thinner than the axial thickness of the other bearing ring facing the one bearing ring via the rolling element. And a multi-stage thrust bearing in which a clearance surface that allows the inclination of the inner ring and / or outer ring is formed on at least a part of the inner peripheral surface of the inner ring and / or the outer peripheral surface of the outer ring.