Telescopic Support Bearing Layout for Axial Alignment Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional telescopic supports with roller bearings often lose axial alignment under bending, torsional, or axial loads, leading to wobble or tipping, and the manufacturing process to maintain alignment is laborious and costly due to tolerance variations in aluminum extrusion.
Innovation Solution
A telescopic support design with at least three bearing sets, each having two roller bearings with rotational axes directed toward the longitudinal axis, and a guide plate that interfaces with the outer support tube to stabilize the telescopic support, preventing misalignment and wobble.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional bearing configurations are used with fixed relationship to inner or outer tubes, then the telescopic support can extend and retract, but the bearing loses ability to maintain axial alignment under bending, torsional, or axial loads causing wobble or tipping
Solution Approach 1:
The bearing configuration is changed from fixed to dynamic, allowing the bearing to move radially outward from the central axis under load. This dynamic adjustment enables the bearing to maintain contact with the race surface while accommodating bending, torsional, and axial loads, thereby maintaining axial alignment stability during extension and retraction operations.
Solution Approach 2:
The bearing is positioned within the telescopic support structure such that it can move between a retracted position (nested closer to the central axis) and an extended position (moved radially outward). This nested configuration allows the bearing to adapt its position based on loading conditions while remaining part of the integrated support system.
2Manufacturing precision
If machined spacer blocks are individually sized and fitted to each bearing set, then axial alignment and clearance control are improved, but manufacturing becomes laborious and expensive
Solution Approach 1:
The bearing and race assembly is designed as a universal component that can be used across multiple telescopic support configurations without requiring custom machining for each unit. The bearing's ability to move radially provides inherent clearance accommodation, eliminating the need for individually sized machined spacers while maintaining consistent alignment and clearance control.
Solution Approach 2:
The bearing configuration is designed to self-adjust and self-align through its ability to move radially outward under load. This self-service mechanism automatically compensates for tolerance variations in the aluminum extrusion process, eliminating the need for manual measurement, machining, and fitting of non-standard spacers for each support unit.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enhances stability, reducing the likelihood of wobble or tipping in applications like overbed tables, while simplifying the manufacturing process by eliminating the need for non-standard spacers and reducing costs.
Implementation Method 1
The inner support is movably received within an interior space of the outer support tube, allowing movement in a direction parallel to a longitudinal axis of the telescopic support. At least three bearing sets are affixed to one of the outer support tube or the inner support, and where each bearing set includes at least two roller bearings
Data Source
AI summary
A telescopic support having an outer support tube and an inner support that move with respect to each other along a longitudinal axis of the telescopic support. At least three bearing sets having roller bearings are affixed to one of the outer support tube or the inner support. The roller bearings of a bearing set may be spaced apart along the longitudinal axis, and may be configured such that a rotational axis of each of the roller bearings is substantially directed toward the longitudinal axis of the telescopic support.