Order Picker Wire Accumulator Prevents Pinching

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Solution Overview

Problem

Order pickers face safety hazards due to power and signal wires being easily pinched by the elevation mechanism during operation, which can lead to mechanical issues and safety risks.

Innovation Solution

A wiring mechanism with a wire accumulator, such as a spring configuration or pulley system, ensures the wires remain tensioned between the stationary and elevation parts, preventing pinching during elevation and stowing during lowering, similar to a tape measure principle.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If wires are installed on the picker platform from the base and travel with the elevation mechanism, then power and signal can be transmitted to the elevation part, but the wires are easily nipped by the elevation mechanism during elevation

Engineering Contradiction:
Improvewire safetyVSAvoidwire pinching
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

A wire accumulator device is introduced as an intermediary between the wire and the elevation mechanism. This device includes a drum for winding the wire, a spring for providing tension, and a housing for containing the components. The wire accumulator mediates the interaction between the wire and elevation mechanism, preventing direct contact and pinching while enabling smooth wire payout and retrieval during elevation operations.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The wire management system is segmented into distinct functional components: a drum for wire storage, a spring for tension maintenance, a pulley for wire guidance, and a housing for protection. This segmentation allows each component to perform its specific function independently, with the drum rotating to payout/retrieve wire, the spring maintaining constant tension, and the pulley guiding the wire away from pinching zones.

Inventive Principle:
Principle #1Segmentation

2Stability of the object's composition

If the wire is always tensioned between the stationary part and the elevation part, then the wire remains taut and organized during elevation, but the wire accumulator mechanism adds complexity to the system

Engineering Contradiction:
Improvewire tension stabilityVSAvoidwiring mechanism complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The spring-loaded wire accumulator is designed to be self-regulating. As the elevation platform rises and wire is paid out, the spring automatically extends to maintain constant tension. When the platform lowers and wire is retrieved, the spring's torsion force automatically winds the wire back onto the drum. This self-service mechanism eliminates the need for external tensioning devices or complex control systems.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The complex active tensioning system is replaced with a passive mechanical spring mechanism. Instead of using motors, sensors, and control algorithms to maintain wire tension, a simple torsion spring provides automatic tension through mechanical energy storage and release. The spring converts rotational motion of the drum into tensile force on the wire, eliminating the need for active control systems.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

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

This solution enhances safety by preventing wire pinching, allowing for steady and smooth elevation, and facilitates easy maintenance by housing hydraulic components in a drawer, while also providing a self-closing door and pothole prevention mechanism.

Implementation Method 1

the spring configuration pays out the wire for the wire is drew, and in lowering, the spring configuration stows the wire in the wire accumulator using the torsion spring-back force of the spring for the wire is no longer drew

Methodology Applied
Scientific EffectTorsion spring-back force: Torsion Spring

Implementation Method 2

The wire is guided by the fixed pulley and then wound around the movable pulley so that some part of the wire is stored on the wire accumulator

Methodology Applied
Scientific EffectPulley: Pulley

Data Source

PatentUS9914626B2Order picker with a wiring mechanism
Publication Date: 2018.03.13 ZHEJIANG DINGLI MACHINERY CO LTD
  • US9914626B2 patent drawing
  • US9914626B2 patent drawing
  • US9914626B2 patent drawing

AI summary

The present invention relates to an order picker with a wiring mechanism, belonging to the technical field of manned elevation equipment. The order picker with a wiring mechanism comprises a stationary part, an elevation mechanism and an elevation part, wherein the wire suitable for transmitting signals is connected between the stationary part and the elevation part. It also comprises a wire accumulator which acts on the wire in such a way that the wire is always tensioned between the stationary part and the elevation part; when the elevation part is raised, the wire accumulator starts to pay out the wire, and when the elevation part is lowered, the wire accumulator starts to stow the wire. The present invention adopts a wire accumulator structure which can avoid the wires which come from the chassis being nipped during elevation of the elevation structure.