The present disclosure relates to a multi-row bearing assembly.
Multi-row bearing assemblies are well known. Multi-row bearing assemblies can be used in wheel bearing applications. In these particular applications, it is critical both provide a high efficiency and also provide a relatively smaller envelope or footprint.
It would be desirable to provide a multi-row bearing assembly that is both efficient and compact.
A bearing assembly is disclosed herein. The bearing assembly includes a first inner ring and a second inner ring, as well as an outer ring. A first plurality of rolling elements are arranged to be supported between the first inner ring and the outer ring. A second plurality of rolling elements are arranged to be supported between the second inner ring and the outer ring. A third plurality of rolling elements are arranged to be supported between the second inner ring and the outer ring. The second plurality of rolling elements is arranged axially between the first and third plurality of rolling elements.
A first contact angle (θ1) can be defined between the first plurality of rolling elements and the first inner ring and the outer ring, a second contact angle (θ2) can be defined between the second plurality of rolling elements and the second inner ring and the outer ring, and a third contact angle (θ3) can be defined between the third plurality of rolling elements and the second inner ring and the outer ring. The second contact angle (θ2) can be less than the first or third contact angles. The second contact angle (θ2) can be 20 degrees-40 degrees.
A first axial distance (A1) can be defined between the second and third plurality of rolling elements that is less than or equal to a second axial distance (A2) defined between the first and the second plurality of rolling elements.
The outer ring can define a first shoulder adjacent to the first plurality of rolling elements, and a second shoulder adjacent to the second plurality of rolling elements. The first shoulder and the second shoulder can be radially offset from each other.
A radial offset (R1) can be defined between the first shoulder and the second shoulder. The radial offset (R1) can be at least 4 mm.
The outer ring can define a first outer raceway for the first plurality of rolling elements and a second outer raceway for the second plurality of rolling elements. An axial offset (A3) can be defined between the first outer raceway and the second outer raceway, and the axial offset (A3) can be at least 4 mm.
A cage can be provided for supporting the second plurality of rolling elements, and another cage can be provided for supporting the third plurality of rolling elements. A distance (A4) can be defined between the two cages that is less than 0.5 mm.
An inner raceway for the second plurality of rolling elements can terminate radially inward from an inner raceway for the third plurality of rolling elements.
The outer ring can define a shoulder between an outer raceway for the second plurality of rolling elements and an outer raceway for the third plurality of rolling elements. The shoulder can be arranged radially outward from the outer raceway for the second plurality of rolling elements.
An outer diameter (OD1) of the outer ring on a first end of the outer ring that supports the first plurality of rolling elements can be equal to an outer diameter (OD2) of the outer ring on a second end of the outer ring that supports the third plurality of rolling elements.
The first plurality of rolling elements can have a larger diameter than a diameter of the second and third plurality of rolling elements.
Additional embodiments are disclosed herein.
The foregoing Summary and the following Detailed Description will be better understood when read in conjunction with the appended drawings, which illustrate a preferred embodiment of the disclosure. In the drawings:
Certain terminology is used in the following description for convenience only and is not limiting. “Axially” refers to a direction along an axis (X) of an assembly. “Radially” refers to a direction inward and outward from the axis (X) of the assembly.
A reference to a list of items that are cited as “at least one of a, b, or c” (where a, b, and c represent the items being listed) means any single one of the items a, b, or c, or combinations thereof. The terminology includes the words specifically noted above, derivatives thereof and words of similar import.
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At least three rows of rolling elements can be provided. Specifically, a first plurality of rolling elements 22, a second plurality of rolling elements 24, and a third plurality of rolling elements 26 can be configured to be supported between the inner rings 15a, 15b and the outer ring 20. In one aspect, a diameter of the first plurality of rolling elements 22 can be larger than a diameter of the second and third plurality of rolling elements 24, 26.
The second plurality of rolling elements 24 can be arranged axially between the first and third plurality of rolling elements 22, 26. The second plurality of rolling elements 24 can have a smaller pitch diameter than the third plurality of rolling elements 26, and the third plurality of rolling elements 26 can have a smaller pitch diameter than the first plurality of rolling elements 22.
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The second contact angle (θ2) can be less than the first contact angle (θ1) and less than the third contact angle (θ3). This configuration can promote improved friction performance, according to at least one advantage. In one aspect, the second contact angle (θ2) is 20 degrees-40 degrees. In one aspect, the first contact angle (θ1) is 30 degrees-45 degrees, and the third contact angle (θ3) is 30 degrees-45 degrees. One of ordinary skill in the art would understand that these values can vary.
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The outer ring 20 can define a first outer raceway 20a for the first plurality of rolling elements 22, a second outer raceway 20b for the second plurality of rolling elements 24, and a third outer raceway 20c for the third plurality of rolling elements 26. As shown in
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Having thus described the present disclosure in detail, it is to be appreciated and will be apparent to those skilled in the art that many physical changes, only a few of which are exemplified in the detailed description of the invention, could be made without altering the inventive concepts and principles embodied therein.
It is also to be appreciated that numerous embodiments incorporating only part of the preferred embodiment are possible which do not alter, with respect to those parts, the inventive concepts and principles embodied therein.
The present embodiment and optional configurations are therefore to be considered in all respects as exemplary and/or illustrative and not restrictive, the scope of the embodiments being indicated by the appended claims rather than by the foregoing description, and all alternate embodiments and changes to this embodiment which come within the meaning and range of equivalency of said claims are therefore to be embraced therein.