Grooved Linear Bearing for Polygonal Rod Stability
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Solution Overview
Problem
Existing linear bearings fail to adequately secure polygonal or edge-bearing tubes or rods from rotating and moving laterally, particularly in heavy-duty environments, due to insufficient structural strength and complexity in design.
Innovation Solution
A grooved linear bearing system with rigid, laterally extending side plates and multiple sets of V-groove bearings, including disk bearings, provides rotational and transverse stability through adjustable mounting channels and slots, allowing for easy assembly and disassembly, and is designed to be stackable and cost-effective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If roller bearings with rounded edges are used to support a polygonal tube or rod, then the rod can slide linearly within the bearing, but the rod is not sufficiently secured from rotating about its axis or moving laterally
Solution Approach 1:
The bearing surface is changed from rounded to V-grooved geometry, creating localized contact zones that conform to the polygonal rod corners. This local geometric modification provides both linear sliding guidance and rotational/lateral stability through the angled grooves that engage with the rod corners.
Solution Approach 2:
The V-groove geometry dynamically adapts to the polygonal rod shape, with the grooves engaging different corners of the rod during rotation and translation. This dynamic engagement maintains stability while allowing controlled linear motion.
2Device complexity
If V-groove bearings are mounted to a single laterally extending triangular plate or narrow bracket, then the bearing structure is simplified, but structural strength is insufficient to prevent rotation and lateral movement
Solution Approach 1:
The bearing structure is divided into multiple separate lateral plates (at least two, preferably four) that are distributed around the rod axis. Each plate provides localized support and stability, while the collective arrangement of multiple plates creates a rigid framework that prevents rotation and lateral movement.
Solution Approach 2:
The support structure transitions from a single-plane (2D) bracket to a multi-plane (3D) arrangement of lateral plates distributed around the rod axis. This dimensional expansion provides stability in multiple directions simultaneously, preventing rotation and lateral movement while maintaining structural strength.
3Reliability
If multiple opposed V-groove bearing assemblies are mounted along U-shaped channels in opposed brackets, then rotational and side-to-side stability is achieved, but the structure becomes complex, bulky, heavy, and costly to manufacture and ship
Solution Approach 1:
Multiple bearing functions are merged into integrated lateral plates that combine support, positioning, and stability functions in single components. The plates are designed to be stackable and nestable, merging multiple structural roles into unified elements that reduce overall part count and assembly complexity.
Solution Approach 2:
The lateral plates are designed with nesting capabilities, allowing them to be stacked and stored in a compact configuration during shipping and storage. This nesting arrangement significantly reduces shipping volume and handling complexity while maintaining the full structural functionality when assembled.
Data Source
AI summary
A grooved linear bearing having a plurality of relatively rigid, laterally extending side plates and multiple sets of one or more circumferentially grooved bearings mounted laterally along and between adjacent side plates. One or more rod or tube corners or edges can penetrate mating peripherally grooved bearings, providing rotational stability for the rod mounted within the bearing; and inclusion of laterally spaced sets of such groove bearings (i.e., laterally along the linear bearing axis) can provide transverse (side-to-side) stability of the rod when slidably mounted within the linear bearing.