Reaction Bar Torque Tool for Stable Tree Core Sampling

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Solution Overview

Problem

Existing tree core sampling methods, such as increment borers, require high torque for rotation, leading to unstable reaction forces that are difficult for operators to manage, especially with larger borer bits.

Innovation Solution

A tool device incorporating a deceleration unit that increases torque input and a reaction bar system to stabilize the reaction force, allowing the tip tool to rotate with increased torque while maintaining stability through a network of linked bars and a spring mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If the rotation torque of the borer is increased, then the ability to rotate larger-diameter borer bits is improved, but the reaction force that the borer bit receives from the tree increases, making it difficult to stably receive the reaction force

Engineering Contradiction:

Improverotation torqueVSAvoidstability of reaction force reception

Core Design Contradiction:

PowerVSStability of the object's composition

Solution Approach 1:

The patent introduces a reaction bar as an intermediary component between the borer bit and the operator. The reaction bar extends perpendicular to the axis of rotation and provides a stable structure for receiving and transmitting the reaction force generated during boring operations, allowing the operator to maintain control even when high torque is applied to larger-diameter bits.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If a larger-diameter borer bit is used, then the capability to collect core samples from larger trees is improved, but it becomes more difficult to stably receive the reaction force from the tree

Engineering Contradiction:

Improvecapability to bore larger treesVSAvoidease of controlling reaction force

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The reaction bar serves as a mediator that decouples the operator from direct contact with the high reaction forces generated by larger-diameter borer bits. By providing a extended structure perpendicular to the rotation axis, it allows the operator to control the bit while maintaining stability despite the increased forces involved.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If human power is used to rotate the borer bit, then the simplicity of the device is maintained, but large amounts of effort and time are spent

Engineering Contradiction:

Improvesimplicity of device structureVSAvoidtime required for core sampling

Core Design Contradiction:

Device complexityVSLoss of time

Solution Approach 1:

The patent transitions from static human-powered rotation to dynamic motor-driven rotation. The motor provides automated rotational force, dramatically reducing the time and effort required for core sampling operations while the reaction bar system manages the resulting forces.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11471956B2Tool device and reaction bar

Publication Date: 2022.10.18 FOREST RES & MANAGEMENT ORG

AI summary

A tool device has a deceleration unit, a tip tool, and a reaction bar. The deceleration unit increases a torque that is input to the deceleration unit. The tip tool is rotated when receiving a motive force from the deceleration unit. The reaction bar is fixed to the deceleration unit. An external force can be made to act on the reaction bar to receive a reaction force that is generated during rotation of the tip tool.