Four-row tapered roller bearing
View Patent ↗The invention relates to a four-row tapered roller bearing for machine mountings, with an inner ring of two-part design axially and on outer ring of single- or multi-part design axially, with an inner and/or an outer tapered-roller row, being supported in each case by an inner ring part. In order, firstly, to confer a large supporting width on the bearing and, secondly, to ensure as optimum as possible and as uniform as possible a loading of the rolling bodies in the form of the tapered rollers, the tapered-roller rows are arranged in an O-arrangement, and the roller axles or the respectively adjacent outer and inner tapered rollers of the two respectively adjacent outer and inner tapered-roller rows are arranged at an inclination in such a manner that those lines of influence of the tapered rollers which characterize the pressure angles intersect in the region of the axis of rotation of the tapered roller bearing. In addition to other advantages, this bearing can be produced more cost-effectively and, with regard to production quality, more reliably than known four-row tapered roller bearings.
1. A four-row tapered roller bearing for machine construction bearings, comprising:
an inner ring which is formed axially in two parts;
an outer ring which is formed axially in one or more parts; and
an axially outer and an axially inner tapered roller row being supported by each inner ring part,
wherein the tapered roller rows are arranged in an O-arrangement, the roller axes each adjacent outer and inner tapered rollers of the two adjacent outer and inner tapered roller rows are inclined in such a way that the lines of action, which characterize the pressure angles, of the tapered rollers intersect in the region of the rotational axis of the tapered roller hearing, and a double support, or a statically determinate support, is generated for each inner ring part.
2. The four-row tapered roller bearing as claimed in claim 1 , wherein support rims for the axial support of the tapered rollers are arranged on the inner and/or on the outer ring.
3. The four-row tapered roller bearing as claimed in claim 2 , wherein the spacings of the support rims and the axial length of the tapered rollers are a function of boundary conditions for equal loadings of the tapered roller rows.
4. The four-row tapered roller bearing as claimed in claim 3 , wherein the boundary conditions are any deformation of surrounding components.
5. The four-row tapered roller bearing as claimed in claim 3 , wherein, with regard to the two inner ring parts, the spacings of the support rims and accordingly the axial lengths and diameters of the tapered rollers are selected to be different.
6. The four-row tapered roller bearing as claimed in claim 1 , wherein the number of tapered rollers of at least one of the tapered roller rows deviates from the selected number of tapered rollers of the other tapered roller rows.
7. The four-row tapered roller bearing as claimed in claim 1 , wherein the two axially inner tapered roller rows are acted on with a preload or with a different axial play than the other tapered roller rows.
8. The four-row tapered roller bearing as claimed in claim 1 , wherein the single-part or multi-part outer ring is formed by a planet gear or some other gear which has raceways for the tapered rollers.
9. The four-row tapered roller bearing as claimed in claim 1 , wherein the point of intersection of the lines of action of the tapered rollers is at a distance of less than 10% of the bearing's outer diameter from the rotational axis of the tapered roller hearing.