Friction Dampened Mechanical Strut with Compressible Material

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Solution Overview

Problem

Existing spring systems lack effective control over rod movement speed and end travel cushioning, particularly in applications where precise control and deceleration are required.

Innovation Solution

Incorporation of compressible materials within the spring system, which compress and deform to interact with the rod and housing interior, controlling the movement speed by exerting frictional forces proportional to the compressible material's durometer, thickness, and spacing from the rod.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If traditional spring systems are used without compressible material, then the structure is simple, but the rod movement speed cannot be controlled and end travel cushioning is insufficient

Engineering Contradiction:

Improverod movement speed controlVSAvoidspring system structure

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

A compressible material is introduced as an intermediary element between the rod and the spring system. This material provides frictional engagement with the rod to control its movement speed while also providing cushioning during end travel, thereby resolving the contradiction between speed control capability and structural simplicity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The frictional force between the compressible material and the rod is controlled by adjusting parameters such as the compressible material's durometer, thickness, and spacing from the rod. These parameter changes enable precise control over rod movement speed without requiring complex mechanical control systems.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If existing spring systems are used, then the design is straightforward, but end travel cushioning is insufficient for applications requiring precise deceleration

Engineering Contradiction:

Improveend travel cushioningVSAvoidspring system configuration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The compressible material is positioned within the spring system to provide cushioning action before the rod reaches its end travel position. The material progressively engages with the rod during compression, providing controlled deceleration and cushioning that prevents shock and damage at end travel, thereby improving reliability without significantly increasing complexity.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 solution provides controlled deceleration and cushioning of the rod's movement, allowing for precise speed regulation and reduced velocity, applicable across various industries including medical, automotive, and manufacturing.

Implementation Method 1

controlling the movement speed by exerting frictional forces proportional to the compressible material's durometer, thickness, and spacing from the rod

Methodology Applied

Scientific EffectFriction: Friction