Adjustable Tree Stand With Fixed Threaded Rod and Gear Mechanism

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Solution Overview

Problem

Conventional tree stands have high defect rates due to manufacturing complexity and alignment issues, risk of structural failure, and component loss during transportation or use.

Innovation Solution

An adjustable tree stand design featuring a support unit with lateral parts and mounting structures, a cable unit with attachment members, and a control unit with a fixed threaded rod, gear set, and drive part for adjusting cable tension, which simplifies manufacturing, enhances safety, and prevents component loss.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a rotatable threaded rod is used to tighten the cable around the tree, then the tree stand can be adjusted and secured, but the manufacturing complexity increases and alignment precision requirements increase

Engineering Contradiction:

ImproveadjustabilityVSAvoidmanufacturing complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Instead of making the threaded rod rotatable to achieve adjustment, the patent inverts the approach by making the threaded rod fixed and rotatable instead is the gear set that moves the slide seat along the fixed rod. This inversion simplifies the threaded rod's mounting requirements while achieving the same adjustment functionality through the gear-mechanism.

Inventive Principle:

Principle #13The other way round (Inversion)

2Adaptability or versatility

If a rotatable threaded rod is used for cable tightening, then tension adjustment is possible, but the risk of structural failure increases due to blocking and misassembly risks

Engineering Contradiction:

Improvetension adjustment capabilityVSAvoidstructural safety

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent inverts the traditional design by fixing the threaded rod and making it non-rotatable, eliminating the blocking risk. The adjustment function is achieved by rotating the gear set that moves the slide seat along the fixed rod, thereby eliminating misassembly risks while preserving tension adjustment capability.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent introduces a gear set as an intermediary mechanism between the user's rotational input and the linear movement of the slide seat. This gear mediator translates rotation into controlled linear motion, providing reliable tension adjustment without the risks associated with a rotatable threaded rod.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If driving components are included in the conventional tree stand design, then cable tension adjustment is enabled, but component loss during transportation or between uses increases

Engineering Contradiction:

Improvetension controlVSAvoidcomponent loss

Core Design Contradiction:

Adaptability or versatilityVSLoss of substance

Solution Approach 1:

The patent merges the drive part with the gear set, forming an integrated assembly that reduces the number of separate components. This integration ensures that driving components remain attached and functional, preventing loss during transportation or between uses while maintaining tension control capability.

Inventive Principle:

Principle #5Merging (Combining)

4Manufacturing precision

If precise disposition and alignment are required for the rotatable threaded rod, then proper functioning is achieved, but labor costs and defect rates increase

Engineering Contradiction:

Improvealignment precisionVSAvoidmanufacturing ease

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent inverts the design by making the threaded rod fixed rather than rotatable. This inversion eliminates the need for precise alignment of a rotatable rod, as the fixed rod can be simply mounted in a slot or bracket. The adjustment function is achieved through the gear set moving along the fixed rod, dramatically simplifying manufacturing and reducing defect rates.

Inventive Principle:

Principle #13The other way round (Inversion)

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

The design reduces manufacturing and assembly costs, improves safety by preventing structural failure, and retains components, ensuring a stable and reliable tree stand.

Implementation Method 1

a gear set (43) mounted rotatably to the slide seat (42) and threadedly engaging the threaded rod (41)

Methodology Applied

Scientific EffectGear mechanism: Gear

Implementation Method 2

a gear set (43) mounted rotatably to the slide seat (42) and threadedly engaging the threaded rod (41)

Methodology Applied

Scientific EffectThreaded engagement: Screw

Data Source

PatentUS8132648B2Adjustable tree stand

Publication Date: 2012.03.13 TONG PAI

AI summary

An adjustable tree stand includes a support unit that includes a support platform having two lateral parts, and that further includes first and second mounting structures, each mounted to a corresponding one of the lateral parts of the support platform. The adjustable tree stand further includes a cable unit that includes a cable, a first attachment member connected to one end of the cable, and a second attachment member connected to the other end of the cable for releasably coupling with the second mounting structure.The adjustable tree stand also includes a control unit including a threaded rod mounted non-rotatably to the first mounting structure, and a slide seat connected to the first attachment member of the cable unit and coupled movably to the first mounting structure for sliding movement therealong.