Toroidal End Ring Degradation Pick Support
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Solution Overview
Problem
Existing degradation pick arrangements around the periphery of a rotatable drum are limited in density due to the footprint of tool holders, restricting the number of picks that can be fitted in a defined area, particularly at the ends of the drum where additional material engagement is desired.
Innovation Solution
A toroidal body with a helical pattern of bore holes is secured to a rotatable drum, allowing for a higher density of degradation picks, including some that extend beyond the drum's end, with replaceable sleeves or counterbores to accommodate hardened tips, and a unitary mass construction for durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If tool holders are arranged around the periphery of a rotatable drum, then degradation picks can be positioned to engage material, but the footprint of each tool holder limits the number of picks that can be fitted in a defined area
Solution Approach 1:
The invention transitions from arranging tool holders on a two-dimensional periphery to utilizing a three-dimensional toroidal body. The toroidal shape allows tool holders to be distributed across the curved surface area of the torus, effectively adding a dimensional aspect that increases the available space for positioning degradation picks without increasing the drum's footprint.
Solution Approach 2:
The toroidal body itself is nested onto the rotatable drum, creating a compact configuration where the tool holders are integrated into the toroidal structure. This nesting approach allows the degradation picks to be positioned in a concentrated area around the drum end while maintaining a compact overall form factor.
2Quantity of substance
If additional degradation picks are positioned proximate the end of the drum using a ring structure, then material engagement beyond the drum end is improved, but the density of picks is limited by the ring's periphery arrangement
Solution Approach 1:
The invention employs a toroidal body with a curved surface instead of a flat or linear arrangement. This curvature allows tool holders to be distributed along the rounded surface, maximizing the use of available space and enabling higher pick density without requiring a complex multi-component structure. The curved geometry naturally accommodates more picks in a compact configuration.
3Productivity
If tool holders occupy a given footprint around the periphery, then structural simplicity is maintained, but the number of picks that can be strategically positioned is restricted
Solution Approach 1:
By transitioning from a two-dimensional periphery arrangement to a three-dimensional toroidal configuration, the invention increases the surface area available for positioning tool holders. This dimensional change allows more degradation picks to be strategically positioned to engage material effectively, thereby improving productivity without increasing the overall footprint of the device.
Data Source
AI summary
In such fields as road milling, mining and trenching it is often desirable to engage and degrade tough materials such as asphalt, concrete and rock. To do so, degradation picks comprising hardened tips may be secured to an exterior of a rotatable drum so as to be repeatedly brought into contact with a surface of a material to be degraded. To secure such degradation picks to the rotatable drum, a toroidal body comprising an interior surface rigidly attachable to the rotatable body and an exterior surface comprising a plurality of bore holes disposed there around may receive a plurality of degradation picks secured within the bore holes.