Self-Centering Roller Guide for Transverse Force Absorption
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Solution Overview
Problem
Existing guides for rods and tubes, such as plain and ball bearings, face increased friction and reduced durability when subjected to radial forces during movement, failing to effectively absorb transverse forces and maintain centering.
Innovation Solution
A self-centering roller guide with uniformly arranged rollers along the circumference, equipped with clamping rings and spring elements, allowing for radial movement and automatic centering, which includes a rotationally symmetrical magnetic vibration damper for friction-free movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plain bearings or ball bearings are used to guide rods, then the rods can be guided during movement, but friction increases and bearing life reduces when radial forces act on the rod
Solution Approach 1:
The bearing surface is segmented into multiple rollers arranged around the rod's circumference. Each roller can independently rotate and move radially, dividing the contact into multiple discrete points rather than a continuous surface. This segmentation allows the rod to be supported by multiple small rolling contacts, reducing overall friction while maintaining guidance capability even under radial forces.
Solution Approach 2:
The roller holders are designed to be radially movable, allowing the rollers to dynamically adjust their position in response to radial forces. When radial loads are applied, the roller holders can shift radially to accommodate the force direction, maintaining optimal contact geometry and preventing the increased friction and premature failure that would occur with fixed bearing surfaces.
2Ease of operation
If fixed bearings are used to guide rods, then the structure is simple, but the bearings cannot automatically compensate for transverse forces and maintain centering
Solution Approach 1:
The radial position of the rollers is made variable through the movable roller holder design. This parameter change allows the contact points to automatically adjust to radial displacements and transverse forces, enabling self-centering functionality. The ability of the roller holders to change their radial position dynamically allows the system to compensate for misalignment and maintain optimal centering without complex active control mechanisms.
Solution Approach 2:
The roller guide system is self-adjusting and self-centering through the inherent flexibility of the roller holder mounting. The system automatically compensates for radial forces and maintains proper alignment without requiring external adjustment mechanisms, sensors, or active control systems. The radial movability of the roller holders provides built-in self-correction capabilities that eliminate the need for additional centering devices.
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 solution provides low-friction guiding with automatic centering and absorption of transverse forces, maintaining contact and reducing friction even under varying conditions, such as temperature changes, and is suitable for vibration dampers and wind turbines.
Implementation Method 1
the clamping device (6) has a first and a second clamping ring (6a, 6b) which are connected to each other and preloaded against each other by spring elements (7)
Implementation Method 2
the rollers (1) arranged outside the support device (5) and moved relative to the support device (5)... spring-elastically movable in the radial direction
Implementation Method 3
self-centering roller guide by which said moving part can be guided with low friction via rollers arranged along its circumference
Implementation Method 4
one tube is composed of one or more permanent magnetic or magnetizable rings or ring segments, wherein these magnetic or magnetizable elements are arranged such that the north and south poles point either radially inwards or radially outwards
Implementation Method 5
rotationally symmetrical magnetic vibration damper comprising an inner tube and an outer tube... frictionless relative movement of the non-magnetic conductive tube relative to the aforementioned magnetic or magnetizable tube elements
Data Source
Figure 1~2
Figure 3a~3b
Figure 3c~4
AI summary
The invention relates to a self-centering guide, based on preloaded running rollers, for pipes, bars and rods that move along the longitudinal axis thereof and are used in many machines and devices. The invention further relates to vibration absorbers and tuned mass dampers that are equipped with roller guides of said type.