Torsion Spring Tensioning Tool with Split Gear and Fixating Mechanism

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Solution Overview

Problem

Existing torsion spring tensioning tools for overhead door counterbalancing mechanisms are complex, prone to wear, and not robust enough to handle high torque, requiring multiple tools for different brands and types of doors, making them difficult to mount and maintain.

Innovation Solution

A torsion spring tensioning tool with a gear wheel arrangement and fixating mechanism that securely engages the shaft, allowing for simple and robust tensioning by transmitting rotational movement to the torsion spring, featuring a split gear wheel for easy mounting and support gearing for handling high torque.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If prior art tensioning tools are used, then they can perform basic tensioning function, but they are complex, weak, and sensitive to wear

Engineering Contradiction:

ImproverobustnessVSAvoidnumber of parts

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple functions into a single integrated tool body that can accommodate different gear wheel arrangements and fixating mechanisms, eliminating the need for multiple separate tools while maintaining robustness against high torque and wear

Inventive Principle:

Principle #5Merging (Combining)

2Ease of operation

If prior art tensioning tools are used, then they can tension torsion springs, but they require a large number of operations to connect to the torsion spring

Engineering Contradiction:

Improvemounting simplicityVSAvoidmounting time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The tool body is divided into modular components including removable gear wheels and fixating mechanisms that can be quickly attached and detached from the shaft, reducing mounting operations and time while maintaining secure engagement

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The fixating mechanism is pre-configured with engagement elements that automatically align with and secure to the shaft features, eliminating the need for complex manual alignment and multiple fastening operations

Inventive Principle:

Principle #10Preliminary action

3Strength

If prior art tensioning tools are used, then they can handle torsion spring tensioning, but they are not robust enough to handle high torque

Engineering Contradiction:

Improvetorque handling capabilityVSAvoidwear resistance

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The tool body and gear wheel arrangement utilize composite construction with hardened steel components for high-strength areas and durable coatings on friction surfaces, providing both the strength to handle high torque and wear resistance for reliable operation

Inventive Principle:

Principle #40Composite materials

4Adaptability or versatility

If service personnel use different brands and types of door tools, then they can service various door types, but they require a large number of tools

Engineering Contradiction:

Improvecompatibility with different door typesVSAvoidnumber of tools

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The tool body is designed as a universal platform that can accommodate different gear wheel arrangements and fixating mechanisms through standardized interfaces, enabling a single tool to service multiple door types and brands while maintaining adaptability to various shaft configurations

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 tool provides a user-friendly, robust, and secure method for tensioning torsion springs, reducing the need for multiple tools and improving maintenance efficiency across different door types.

Implementation Method 1

a gear mechanism coupled to the gear wheel for rotating said gear wheel

Methodology Applied

Scientific EffectGear mechanism: Gear

Implementation Method 2

The gear wheel arrangement comprises a gear wheel rotatably arranged in the housing, the torsion spring tensioning tool further comprising a gear mechanism coupled to the gear wheel for rotating said gear wheel

Methodology Applied

Scientific EffectMechanical advantage: Mechanical Advantage

Implementation Method 3

The gear wheel arrangement comprises a fixating arrangement fix to the gear wheel and adapted to engage the shaft of the counterbalancing mechanism and transmit a rotational movement from the gear wheel to the torsion spring

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS20230405780A1Torsion spring tensioning tool

Publication Date: 2023.12.21 ASSA ABLOY ENTRANCE SYST AB

AI summary

Torsion spring tensioning tool for tensioning a torsion spring of a counterbalancing mechanism of an overhead door, wherein the torsion spring tensioning tool comprises a housing, a gear wheel arrangement adapted to be mounted on a shaft of a the counterbalancing mechanism, said gear wheel arrangement comprising a gear wheel rotatably arranged in the housing, the torsion spring tensioning tool further comprising a gear mechanism coupled to the gear wheel for rotating said gear wheel. The gear wheel arrangement comprises a fixating arrangement fix to the gear wheel and adapted engage the shaft of the counterbalancing mechanism and transmit a rotational movement from the gear wheel to the torsion spring.