Feed Wheel Divergent Support Geometry for Self-Clearing
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Solution Overview
Problem
Feed wheels for tree trunks face issues with bark and wood material accumulation, leading to reduced penetration depth of drive teeth, increased wear, and unreliable measurement results due to varying rolling diameter.
Innovation Solution
The feed wheel design features neighbours supports that extend divergently on the peripheral surface, forming wedge-shaped spaces with a positive angle of release, and drive teeth with angled surfaces to facilitate self-clearing, utilizing centrifugal force and sideways forces to remove residual material effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the teeth are made with large height to permit material accumulation, then the self-cleaning properties are improved, but the tree trunks are damaged
Solution Approach 1:
The support surfaces are given a specific local geometry with a positive angle of release (divergent arrangement) that is specifically oriented to facilitate the removal of bark and wood material, while the teeth themselves maintain appropriate height to avoid trunk damage. This localized geometric modification creates self-clearing spaces without requiring excessively high teeth.
2Reliability
If the supports are made spring-loaded to provide self-clearing influence, then the bark and wood material removal is improved, but the maintenance costs increase due to limited spring lifetime
Solution Approach 1:
The feed wheel design enables self-clearing through the geometric arrangement of support surfaces with a positive angle of release, allowing bark and wood material to be automatically removed during normal operation without requiring active spring mechanisms or external intervention. This passive self-service approach eliminates the need for maintenance-prone spring components.
3Object-affected harmful factors
If the plateau is elevated to prevent teeth sinking, then the material falling into spaces is reduced, but the feed capacity is reduced
Solution Approach 1:
Instead of elevating the entire tooth base onto a plateau, the invention applies a localized geometric modification to the support surfaces with a positive angle of release. This allows the teeth to maintain full penetration depth for high feed capacity while the divergent support geometry prevents material accumulation in the spaces between teeth.
4Reliability
If the spaces between supports are made divergent to create release effect, then the self-clearance is improved, but the device complexity increases
Solution Approach 1:
The support surfaces are given a specific local geometry with a positive angle of release (divergent arrangement) that is specifically oriented to facilitate the removal of bark and wood material, while the teeth themselves maintain appropriate height to avoid trunk damage. This localized geometric modification creates self-clearing spaces without requiring excessively high teeth.
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
This design enhances self-clearance, maintaining a high feed capacity while reducing wear and ensuring accurate timber measurement by effectively preventing bark and wood material from getting stuck, thus improving the reliability of the feed wheel's operation.
Implementation Method 1
The spaces, which according to the invention are divergent in the sideways direction, then come into function instead, though the residuals, as soon as they are subject to a sideways force in the right direction from the wheel of the tree trunk, being released from their interaction with the sides of the supports and falling out from the space with the aid of centrifugal force when the spaces leave their interaction with the tree trunk during the rotation of the wheel.
Data Source
AI summary
A feed wheel (10) for tree trunks, with rows of drive teeth (30) protruding from extended supports (20) united with a peripheral surface (18) of the wheel. In order to make the spaces between the supports (20) more self-clearing, supports (20) that are neighbours extend mutually divergently throughout the complete sideways direction of the peripheral surface (18) (at an angle α).