Pre-assembled unit having two tapered roller bearings
AssigneeFersa Bearings S.A.
InventorsJosé Enrique Calvo Isasi, Ignacio Miguel Martín, Javier Salvador Lou, Sergio Santo Domingo
Life of this patent
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Abstract
A pre-assembled unit having two tapered roller bearings for a driven shaft designed to be replaced efficiently and to maintain optimal tightness as if it were factory assembled. The bearing has a rubber seal attached to a lateral face of the inner race of one of the tapered rollers, the face being opposite the smooth face of the other tapered roller. The necessary widening of the inner races requires a a roller cage that allows the rollers to rock slightly in order to be assembled without causing damage or becoming damaged.
Claims4
A pre-assembled unit having two tapered roller bearings comprising:
- an inner race of a sealing cone which has, on a free outer side face of the inner race of the sealing cone, a recess limited by an outer ring and an inner ring,
- an inner race of a second cone that is separate from the sealing cone, the inner race of the second cone having a flat free outer side face,
- a rubber seal inserted in the recess, and
- two cages that mount rollers, each of said cages comprising a first cage ring and a second cage ring, wherein a diameter of the first cage ring is greater than a diameter of the second cage ring,
- wherein each of said cages comprises a series of arms disposed equidistantly around and joining the first cage ring and the second cage ring, wherein each of the series of arms has a trapezoidal section that widens from a first end thereof to a second end thereof, the first end thereof being a portion closest to the second cage ring, the second end thereof being a portion closest to the first cage ring, wherein each of the series of arms includes a widened base portion adjacent to the first cage ring that extends along that arm from the second end thereof, and is configured to permit rocking of associated rollers while retaining the rollers between adjacent arms, and wherein a notch or cut is formed on an inner surface of each inner face of each of the series of arms to permit rocking of the associated rollers while preventing the associated rollers from falling out during assembly.
Dependencies are inferred from the claim text.