Stump Planing Device Segmented Guide for Swarf Egress
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Solution Overview
Problem
Existing stump planing devices face issues with wood-swarf clogging due to continuous peripheral arcuate guides, which also make them difficult to store and transport, and struggle with maintaining centered planing to prevent wandering.
Innovation Solution
A stump planing device with a rotatable support shaft and detachable cutting arms featuring a discontinuous arcuate centring-guide arm that provides a gap for swarf egress, allowing for centered planing without clogging and enabling compact storage and transportation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a continuous peripheral arcuate guide is used to maintain centered planing, then planing accuracy is improved, but wood-swarf clogging occurs and the device cannot be easily dismantled for storage
Solution Approach 1:
The continuous peripheral arcuate guide is divided into multiple discrete arcuate centring-guide arms, each attached to individual cutting arms. These segmented guides are spaced apart to create gaps that allow wood swarf to pass through radially outward, preventing clogging while maintaining the centring function during planing operation
2Manufacturing precision
If a continuous peripheral arcuate guide is used to maintain centered planing, then planing accuracy is improved, but the device complexity increases for storage and transportation
Solution Approach 1:
The guide structure is segmented into detachable components attached to individual cutting arms, allowing the entire assembly to be disassembled. The support shaft can be removed from the cutting arms, enabling compact storage and transportation while the arcuate guides remain attached to the cutting arms for maintaining accuracy during operation
Solution Approach 2:
The device transitions from a fixed continuous guide structure to a dynamic detachable configuration. The cutting arms with their attached arcuate guides can be detached from the support shaft, transforming the device from an operational state with continuous guidance to a storage state with dispersed components
3Ease of operation
If cutting arms are made detachable for storage, then ease of storage is improved, but maintaining centered planing becomes more difficult
Solution Approach 1:
The arcuate centring-guide arms serve dual functions: they provide centring guidance during planing operation and remain attached to the cutting arms for compact storage. The guide arms are positioned to extend radially outward and engage with the stump surface, maintaining the cutting arms centered during rotation while allowing the entire assembly to be easily detached for storage
Data Source
Figure 1a~1b
Figure 1c~2
Figure 3~4
AI summary
A stump planing device (10) comprises a rotatable support shaft (16), and at least two cutting arms (24) extending from the support shaft (16). Each said cutting arm (24) includes a cutter (48) on a cutting-arm body (30) of the cutting arm (24), and an arcuate centring-guide arm (34) at or adjacent to a distal end of the cutting-arm body (30). Each arcuate centring-guide arm (34) defines a constant outer radius along its longitudinal extent and is spaced from a neighbouring arcuate centring-guide arm (34), so as to provide a gap (46) for the passage of cut material. A stump planing system, and earth drill device, a hydraulic machine, and two methods all utilising such a stump planing device (10) are also provided.