Mobile Wood Chipper Sliding Mechanism for Rugged Terrain Access

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Solution Overview

Problem

Current methods for clearing slash in rugged areas are labor-intensive and costly, as large wood chippers cannot access these areas due to terrain constraints, and even smaller chippers require significant expense and effort to transport.

Innovation Solution

A mobile wood chipper system mounted on a passenger vehicle, with a slidable structure allowing the chipper to transition between stowed and operational positions, powered by a generator mounted on the vehicle, enabling efficient processing of slash in challenging terrains.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If large wood chippers are used to process slash, then processing efficiency is improved, but accessibility to rugged terrain deteriorates

Engineering Contradiction:
Improveslash processing efficiencyVSAvoidaccessibility to rugged terrain
Core Design Contradiction:
ProductivityVSAdaptability or versatility

Solution Approach 1:

The wood chipper system is divided into separable components: a portable chipper unit that can be detached from the vehicle. This allows the vehicle to access rugged terrain independently while the chipper unit can be deployed at the destination for processing operations, resolving the contradiction between vehicle accessibility and processing efficiency.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

A vehicle serves as an intermediary platform that transports the portable chipper unit to locations inaccessible to large chippers. The vehicle provides mobility and access to rugged terrain, while the portable chipper unit attached to it delivers slash processing capability at remote locations.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Adaptability or versatility

If manual hauling of slash is used, then accessibility to rugged terrain is maintained, but labor intensity increases

Engineering Contradiction:
Improveaccessibility to rugged terrainVSAvoidlabor intensity
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The portable chipper unit enables the system to process slash autonomously at the location where it accumulates, eliminating the need for manual collection and hauling. The unit processes branches and small trees directly at the rugged terrain location, converting labor-intensive manual handling into automated mechanical processing.

Inventive Principle:
Principle #25Self-service

3Adaptability or versatility

If portable wood chippers are used, then accessibility to rugged terrain is improved, but processing capacity deteriorates

Engineering Contradiction:
Improveaccessibility to rugged terrainVSAvoidslash processing capacity
Core Design Contradiction:
Adaptability or versatilityVSProductivity

Solution Approach 1:

The system dynamically adapts its processing capacity to match the scale of operations required in rugged terrain. The portable chipper unit is sized appropriately for the volume of slash typically found in these areas, providing sufficient processing capacity while maintaining the mobility needed for terrain accessibility.

Inventive Principle:
Principle #15Dynamics

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

Enables easy access to rugged areas with reduced labor and cost, as the wood chipper can be driven on smaller vehicles that can navigate uneven terrain, and the system is designed for convenient operation and safe feeding of materials.

Implementation Method 1

a hydraulic system, which may be powered by a generator, for moving the wood chipper module between the stowed position and the operational position

Methodology Applied
Scientific EffectHydraulic power: Hydraulic Press

Implementation Method 2

including rollable members that are supported by and rollable on the horizontal rolling surface of the first portion of the slidable structure

Methodology Applied
Scientific EffectRolling: Roller

Data Source

PatentEP2969436B1Mobile wood chipper
Publication Date: 2020.11.25 FINNEY RICHARD WALTER
  • EP2969436B1 patent drawingFigure 1
  • EP2969436B1 patent drawingFigure 2
  • EP2969436B1 patent drawingFigure 3

AI summary

A mobile wood chipper that is mounted to a motor vehicle. The wood chipper has an input hopper that during operation is desirably located at a convenient height for a user. In the case of mounting in a station wagon or van, a slidable structure may be used to allow the wood chipper to be slid into an operational position with the wood chipper at least largely outside the vehicle, and a stowed position with the wood chipper at least largely inside the vehicle. In the case of mounting in a truck, a lift mechanism may be used to allow the wood chipper to be lowered into an operational position with the wood chipper at a convenient height for a user, and lifted up into a stowed position within the truck bed. A power generator is also included to supply power to the wood chipper.