Injection molded spacer block

By designing an open window structure consisting of a single arc-shaped frame and partition columns, the problems of stress concentration and insufficient lubrication in traditional wind turbine pitch bearings were solved, achieving long cage life and low-cost production.

CN224469505UActive Publication Date: 2026-07-07SHANDONG GOLDEN EMPIRE PRECISION MACHINERY TECH CO LTD
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Patent Information

Application Number
CN202521070705.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-28
Publication Date
2026-07-07
Estimated Expiration
2035-05-28

AI Technical Summary

Technical Problem

Traditional wind turbine pitch bearing cages are prone to cracking under dynamic loads, insufficient lubrication leading to friction and wear, and have high manufacturing costs and complex molds.

Method used

An open window structure consisting of a single arc-shaped skeleton and partition columns replaces the traditional closed outer frame. The partition columns fit snugly against the inner and outer rings of the bearing, and the rolling elements are confined between the window and the ring wall, forming a dual constraint in both the radial and axial directions. This reduces stress concentration and lubrication dead angles, and lowers mold complexity and material consumption.

Benefits of technology

It extends cage life, reduces wear caused by insufficient lubrication, lowers manufacturing costs and friction loss, improves lubrication performance, and reduces equipment failure rate.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses an injection molding isolation block which is composed of a single-arc skeleton and a plurality of partition columns uniformly distributed thereon. The partition columns at both ends of the arc-shaped skeleton are arranged in flush with the end faces of the arc-shaped skeleton. Adjacent partition columns and the arc-shaped skeleton jointly enclose open window holes. By designing the single-arc skeleton, the partition columns are arranged along the arc-shaped skeleton, and adjacent partition columns and the skeleton jointly enclose open window holes, thereby replacing the traditional closed isolation block structure. The end portions of the partition columns are attached to the inner walls of the inner and outer rings of the bearing, the rolling body is limited between the window holes and the bearing ring walls, and radial and axial double constraints are formed, so that the rolling body can stably rotate. The partition columns and the arc-shaped skeleton directly enclose the open window holes, the corner structure is reduced, the stress concentration source is reduced, and the lubrication dead angle is reduced. Since only the arc-shaped skeleton and the partition columns are reserved, the mold complexity and the injection molding difficulty are reduced, the material consumption is reduced, and the cost is further reduced.
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