Tapered roller bearing

The tapered roller bearing with a segmented cage and detachable connecting member addresses assembly challenges, providing a cost-effective and reliable solution for large bearings by using guide claws and elastically deformable anti-fall-out portions for easy assembly and roller guidance.

JP2026028391APending Publication Date: 2026-02-20NTN CORP
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Patent Information

Application Number
JP2024130761
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-08-07
Publication Date
2026-02-20

AI Technical Summary

Technical Problem

Large tapered roller bearings with an outer diameter exceeding 1 m face challenges in assembly due to equipment limitations and high costs associated with steel plate cages, and segment cages made by resin injection molding are difficult to mold and require additional parts for assembly.

Method used

A tapered roller bearing design featuring a cage with multiple segments connected by a detachable connecting member, incorporating guide claws and elastically deformable anti-fall-out portions to prevent roller displacement during assembly, allowing for easy assembly and reduced parts.

Benefits of technology

The design reduces assembly complexity, minimizes parts, and ensures reliable roller guidance, making it cost-effective and suitable for large bearings used in wind turbines and industrial machinery.

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Abstract

To provide a roller guide tapered roller bearing which is inexpensive and excellent in assemblability by reducing the number of components.SOLUTION: In a tapered roller bearing 1, a tapered roller 15 is housed in a pocket 16 of a retainer segment 20, and the tapered roller 15 is prevented from falling off to an outer diameter side by a second guide claw extending to the outer diameter side from a column part 23 constituting the pocket 16 and a fall-off prevention part 29 of the column part 23. The detachment prevention portions 29 are elastically deformable, and when elastically deformed, the distance Dp between the detachment prevention portions 29 becomes larger than the diameter Dr of the tapered roller 15 at a position where the tapered roller 15 is in contact with the detachment prevention portions 29, so that the tapered roller 15 can be inserted into the pocket 16 from the radially outer side. The cage segment 20 is coupled by a coupling member 25.SELECTED DRAWING: Figure 3
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Citation Information

Patent Citations

  • Conical roller bearing

    JP2022179448A

  • Rolling bearings, cage segments and main shaft support structures for wind power generators

    JP4342512B2