Block-Type Aerial Work Platform Height Adjustment Mechanism

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Solution Overview

Problem

Traditional aerial work platforms face safety issues due to limited elongation length, requiring separate platforms for varying work heights, and accidents can occur during height adjustments with poor hydraulic pressure control.

Innovation Solution

A block-type aerial work platform with detachable, multi-stage lifting/lowering means, featuring pivotally connected lift arms and a DC actuator, allowing for adjustable height without replacing the platform, enhancing safety and efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a fixed maximum elongation length aerial work platform is used, then the platform can be operated at a specific height range, but separate aerial work platforms are needed for different work positions, increasing device complexity and reducing adaptability

Engineering Contradiction:

Improveadaptability to different work heightsVSAvoidneed for separate platforms

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The lifting/lowering means is divided into multiple detachable block-type units (first block, second block, third block) that can be stacked vertically. Each block contains a scissor mechanism with lift arms and support bars. By stacking different numbers of blocks, the platform can adapt to various work heights without requiring separate platforms for different height ranges.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The lifting/lowering means transitions from a fixed elongation structure to a dynamic, adjustable structure. The detachable blocks can be added or removed based on the required work height, and the scissor mechanisms within each block can expand and contract to provide continuous height adjustment within each block's range.

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If hydraulic pressure is used for lifting/lowering the work platform, then height adjustment is achieved, but poor hydraulic pressure control can cause sudden lowering and safety accidents

Engineering Contradiction:

Improveheight adjustment capabilityVSAvoidsafety during height adjustment

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent replaces the hydraulic pressure control system with a mechanical scissor mechanism system. Each block contains cross-connected lift arms and support bars that form scissor-like structures. These mechanical structures provide inherent stability and controlled movement through their geometric constraints, eliminating the safety risks associated with hydraulic pressure loss or control failures.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The scissor mechanisms are designed with inherent mechanical stability that prevents sudden collapses. The cross-connected structure of lift arms and support bars creates a self-supporting framework that resists buckling and provides gradual, controlled height adjustment, cushioning against the sudden failures that can occur with hydraulic systems.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Ease of operation

If the work platform is lowered to a suitable height by adjusting hydraulic pressure while an operator is on board, then the platform can be repositioned, but safety accidents can occur due to sudden lowering

Engineering Contradiction:

Improveplatform repositioning capabilityVSAvoidsafety hazards to operator

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The hydraulic lowering system is replaced with mechanical scissor mechanisms that provide inherently safer height adjustment. The scissor structures with cross-connected lift arms and support bars offer mechanical advantage and stability during lowering, preventing the sudden collapses that endanger operators during repositioning operations.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS20230399214A1Block-type aerialaerial work platform with easy height adjustment

Publication Date: 2023.12.14 WOO JAE HYUNG

AI summary

A block-type aerial work platform facilitating height adjustment includes: a moving means (10) provided as a quadrangular frame (100) equipped with rollers (101) so as to be movable to a work position; a work platform (20) on which an operator boards to perform aerial work; and a lifting/lowering means (30) foldably installed between the moving means (10) and the work platform (20) to lift/lower the work platform (20).