Asymmetric double-row tapered roller bearing
By using an asymmetric design to adjust the size and contact angle of the roller in double-row tapered roller bearings, the problem of local overload of traditional bearings under asymmetric loads is solved, and the balanced load distribution and bearing durability are achieved.
Patent Information
- Application Number
- CN202410155252.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-04
- Publication Date
- 2025-08-05
AI Technical Summary
Traditional double-row tapered roller bearings are prone to partial overload under asymmetric loads, resulting in early failure of a row of rollers and raceways. The prior art cannot effectively allocate the load to avoid this problem.
The double-row tapered rollers adopt asymmetric design that is different from each other, and the load is redistributed by adjusting the size and contact angle of the rollers to avoid local overload.
The balanced distribution of load under asymmetric load is achieved, extending the service life of the bearing and avoiding the premature failure of rollers and raceways.
Smart Images
Figure CN120426314A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a double-row tapered roller bearing, and in particular to a tapered roller bearing suitable for bearing asymmetric loads (including axial loads and radial loads). Background Art
[0002] Figure 1 and Figure 2 Conventional tapered roller bearings comprise mirror-symmetrical double rows of tapered rollers, designed to withstand complex loads, including radial and axial loads. Axial loads can occur in both a single direction and in both directions. However, particularly under asymmetric loads, when one row of tapered rollers is overloaded, it and its corresponding raceway experience accelerated fatigue and wear, leading to flaking and cracking of the surface material, making it the first row of the double row to fail, even though the other row may still be intact.
[0003] Reality calls for a double row tapered roller bearing in which the load can be distributed according to the designer's intention, thereby avoiding local overload inside the bearing. Summary of the Invention
[0004] To address the above technical issues, the present invention provides a double-row tapered roller bearing comprising two first bearing rings arranged side by side, a single, shared second bearing ring, and double-row tapered rollers disposed between the two first bearing rings and the single, shared second bearing ring. The double-row tapered rollers employ different asymmetric designs.
[0005] The asymmetric roller design allows uneven loads to be redistributed within the bearing according to application needs, preventing premature failure of one row of rollers and raceways due to overload. This asymmetric design breaks the current situation where symmetrical double-row tapered roller bearings are used for all complex loads. It shifts the focus from the overall load-bearing capacity of the bearing to the specific distribution of loads within the bearing, enabling the provision of bearing products that meet the requirements of specific applications.
[0006] Various embodiments and beneficial technical effects of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 Shows a conventional symmetrical double-row tapered roller bearing consisting of a double-row inner ring and a single-piece outer ring;
[0008] Figure 2 Shows a conventional symmetrical double-row tapered roller bearing consisting of a double-row outer ring and a single-piece inner ring;
[0009] Figure 3 Shows an asymmetric double row tapered roller bearing with a double row inner ring and a single outer ring; and
[0010] Figure 4 Shown is an asymmetric double row tapered roller bearing consisting of a double row outer ring and a single-piece inner ring. DETAILED DESCRIPTION
[0011] In the following description, the same or similar reference numerals are used throughout to indicate the same or similar components. In addition, terms indicating directions, such as "axial," "radial," and "circumferential," refer to the axial, radial, and circumferential directions of the components being described, unless otherwise specified or indicated.
[0012] Figure 3 An asymmetric double-row tapered roller bearing comprising a double-row inner ring and a single outer ring is shown. As can be seen from the figure, the asymmetric double-row tapered roller bearing 10 comprises two parallel inner rings 1 and 1', a single, shared outer ring 2, and two rows of tapered rollers 3 and 3' disposed between the two parallel inner rings 1 and 1' and the single, shared outer ring 2. The two rows of tapered rollers 3 and 3' employ different asymmetric designs. This asymmetric design includes, but is not limited to, the two rows of rolling elements 3 and 3' having different shapes, sizes, and / or contact angles, and the inner and outer ring raceways (not labeled) having shapes, sizes, and / or angles adapted to the rolling elements 3 and 3'.
[0013] exist Figure 3 In the illustrated embodiment, the left-hand row of tapered rollers 3 have larger individual dimensions (including axial and radial dimensions) than the right-hand row of tapered rollers 3', designed to withstand a greater combined load (including radial and axial loads). It's easy to understand that, all other conditions being equal, tapered rollers with a longer length (i.e., axial dimension) can withstand greater radial loads than tapered rollers with a shorter length. Furthermore, the left-hand tapered rollers 3 have a greater contact angle (θ>θ') than the right-hand tapered rollers 3', meaning they are designed to withstand greater axial loads.
[0014] Figure 4 The figure shows an asymmetric double-row tapered roller bearing comprising a double-row outer ring and a single inner ring. As can be seen from the figure, the asymmetric double-row tapered roller bearing 10 comprises two outer rings 2 and 2' arranged in parallel, a single shared inner ring 1, and two rows of tapered rollers 3 and 3' arranged between the two parallel outer rings 2, 2' and the single shared inner ring 1. The two rows of tapered rollers 3 and 3' adopt different asymmetric designs. Figure 3 The specific embodiments shown are different. Figure 4The asymmetric tapered roller bearing shown in the figure adopts double-row outer rings 2, 2' and a single inner ring 1, constituting another structural form of the asymmetric double-row tapered roller bearing of the present invention.
[0015] As an important feature of the present invention, Figure 3 and 4 The asymmetric double-row tapered roller bearing shown can also be designed to have the same boundary dimensions as a conventional symmetric double-row tapered roller bearing. This feature enables the asymmetric tapered roller bearing of the present invention to be widely used to replace existing symmetric double-row tapered roller bearings with standard boundary dimensions.
[0016] For the purpose of simplicity, in the appended claims, two bearing rings arranged side by side are defined as "first bearing rings", and one single common bearing ring is defined as "second bearing ring".
[0017] Those skilled in the art will understand that the asymmetric double-row tapered roller bearing described above is not limited to the specific embodiments. The more general technical solution is subject to the limitations set forth in the appended claims. Any modifications and improvements to the present invention, so long as they comply with the limitations set forth in the appended claims, are within the scope of protection of the present invention.
Claims
1. A double-row tapered roller bearing (10), comprising two first bearing rings (1, 2) arranged in parallel, a second bearing ring (2, 1) shared by a single body, and double-row tapered rollers (3, 3') arranged between the two first bearing rings arranged in parallel and the second bearing ring shared by a single body, characterized in that: The double-row tapered rollers (3, 3') are of different asymmetric designs.
2. The double-row tapered roller bearing (10) according to claim 1, characterized in that: The asymmetric design refers to different shapes, sizes and / or contact angles.
3. The double-row tapered roller bearing (10) according to claim 2, characterized in that: A row of tapered rollers (3) bearing a larger axial load has a contact angle (θ) greater than a row of tapered rollers (3') bearing a smaller axial load.
4. The double-row tapered roller bearing (10) according to claim 2, characterized in that: A row of tapered rollers (3) bearing a larger radial load has a length dimension greater than a row of tapered rollers (3') bearing a smaller radial load.
5. The double row tapered roller bearing (10) according to any one of claims 1 to 4, characterized in that: The double row tapered roller bearing has the same boundary dimensions as a conventional symmetrical double row tapered roller bearing.
6. The double-row tapered roller bearing (10) according to claim 5, characterized in that: The first bearing rings are two bearing inner rings (1, 1') arranged in parallel, and the second bearing ring is a single, shared bearing outer ring (2).
7. The double-row tapered roller bearing (10) according to claim 5, characterized in that: The first bearing rings are two bearing outer rings (2, 2') arranged in parallel, and the second bearing ring is a single common bearing inner ring (1).