Wheel Body Inner Ring Design for High Load Stability
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Solution Overview
Problem
Existing wheel bodies with bandage tires face stability concerns under high loads due to stress concentrations at weld seams, particularly in designs with simple outer rings and support webs, which can lead to rim failure and require extensive manufacturing efforts for additional support ribs.
Innovation Solution
A wheel body design featuring a cylindrical outer ring with a support web connected to a coaxial inner ring section, which is connected indirectly to the outer ring, eliminating the need for axial and radial weld seams and using a support ring to distribute load, thereby reducing weld seam stress and manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple construction with an outer ring and support web is used, then manufacturing cost is reduced, but stability under high loads deteriorates due to stress concentrations at weld seams
Solution Approach 1:
The wheel body is divided into three main segments: an outer ring section, an inner ring section, and a support web section connecting them. This segmentation allows each component to be optimized independently and connected through controlled weld seams, distributing structural stresses more effectively than a monolithic design while maintaining manufacturing efficiency.
Solution Approach 2:
The invention transitions from a two-dimensional support web to a three-dimensional structure by adding the inner ring section that extends axially and radially. This dimensional addition creates multiple load paths and distributes stresses across different spatial planes, enhancing stability without proportionally increasing manufacturing complexity.
2Reliability
If multiple support ribs are added to improve stability, then reliability under high loads is improved, but device complexity and manufacturing outlay increase considerably
Solution Approach 1:
The invention merges the functions of multiple support ribs into a unified inner ring section that provides circumferential support. This single continuous structure performs the load-distributing function that would otherwise require multiple discrete ribs, reducing the number of weld seams and simplifying manufacturing while maintaining or improving structural stability.
Solution Approach 2:
The inner ring section serves multiple functions simultaneously: it provides radial support, distributes circumferential loads, reinforces the support web connections, and creates additional bearing surfaces. This multi-functionality eliminates the need for separate components that would otherwise be required to achieve the same structural benefits.
3Ease of operation
If the steel strip bandage is pressed onto the bearing surface in a heated state, then ease of installation is improved, but the bandage shrinks onto the bearing surface after cooling, increasing interference fit
Solution Approach 1:
The invention utilizes temperature as a controllable parameter during the installation process. By heating the steel strip bandage above its transition temperature, the material becomes more ductile and expandable, allowing easy installation. Upon cooling, the material contracts to create the desired interference fit, with the temperature change serving as the driving mechanism for both installation ease and fit strength.
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 achieves enhanced stability under high loads with reduced production costs and increased service life by simplifying the weld process to homogeneous circumferential welds, ensuring higher weld quality and durability.
Implementation Method 1
The steel strip bandage can expediently be pushed or pressed onto the bearing surface of the wheel body in a heated state, so that the steel strip bandage has shrunk to a certain extent onto the bearing surface after cooling.
Data Source
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AI summary
For a wheel body, in particular for use as a rim for a tire, comprising: a cylindrical outer ring section (18) extending coaxially to a wheel body axis, which has on a radial outer surface a tread or a bearing surface for carrying a tire, in particular a tire (12); a support web section (20) connected to the outer ring section (18) and extending radially inwards from the outer ring section, via which the outer ring section can be connected to a wheel holder (22);and a support arrangement (40, 42) connecting the outer ring section (18) with at least one axial side of the support web section (20), it is proposed that the support arrangement (40, 42) has an inner ring section (40) extending radially coaxially to the wheel-body axis within the outer ring section (18), which is connected on the one hand directly or indirectly at a radial distance from the outer ring section (18) to the support web section (20) and on the other hand directly or indirectly at an axial distance from the support web section (20) to a radial inner side of the outer ring section (18).