Agricultural Wheel Weight with Conical Centering and Coding Formations
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Solution Overview
Problem
Existing additional wheel weights for agricultural machines can lead to wheel imbalance due to eccentric attachment, resulting in discomfort, especially at higher speeds, as they do not effectively prevent unintended rotation and ensure precise centering.
Innovation Solution
A design featuring a first load disk with a conical contact surface and a second load disk with counter-conical shoulders, along with spacer domes and coding formations, ensures precise centering and secure attachment, preventing wobbling during rotation by engaging key formations for mutual centering and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conical mounting system is used to attach the weight disk to the intermediate disk, then the assembly is simplified, but the weight disk can still be fastened eccentrically leading to wheel imbalance
Solution Approach 1:
The conical contact surface performs pre-positioning of the second load disk relative to the first load disk during assembly. This preliminary action guides the disks into approximate alignment before final centering is achieved by the coding formations, combining ease of assembly with precise centering.
Solution Approach 2:
The coding formations (cam and recess pairing) introduce asymmetric features on the otherwise rotationally symmetric load disks. These asymmetric elements engage to prevent unintended rotation and ensure precise radial centering, resolving the contradiction between simple conical mounting and precise positioning.
2Device complexity
If the load disks are attached without coding formations, then the device complexity is reduced, but unintended rotation occurs causing wheel imbalance
Solution Approach 1:
Coding formations with cam and recess pairings are introduced on the load disks. These asymmetric features engage to prevent unintended rotation and ensure precise radial centering, resolving the contradiction between simple conical mounting and precise positioning.
Solution Approach 2:
The coding formations act as intermediary elements between the two load disks, providing a mechanical interface that ensures precise centering and prevents rotation. These formations mediate the connection to achieve both simplicity and reliability.
3Manufacturing precision
If spacer domes are added to position load disks in the axial direction, then positioning precision is improved, but the number of components increases
Solution Approach 1:
The spacer domes are integrated directly into the end faces of the load disks, merging the positioning function with the existing disk structure. This eliminates the need for separate positioning components while achieving precise axial positioning, resolving the contradiction between precision and component count.
Solution Approach 2:
The spacer domes serve multiple functions: they provide axial positioning, maintain spacing between disks, and contribute to the overall structural integrity. This multi-functionality reduces the need for additional specialized components.
Data Source
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AI summary
The invention relates to an additional weight for a wheel for ballasting a drive axle of an agricultural machine.