Charging Cable Pulley and Weight Recovery With Progressive Damping
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Solution Overview
Problem
Existing chargers face issues with insufficient restoring force for recovering wires, leading to potential damage or breakage as the wire length increases.
Innovation Solution
A charger design incorporating a pulley system with a weight mechanism and dampers that gradually increase restoring force as the wire is drawn out and decrease it during recovery, using a series of weights and dampers to manage the wire's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wire recovery system is implemented in the charger, then the charging cable can be automatically recovered, but the restoring force becomes insufficient when the wire length increases, causing damage or breakage
Solution Approach 1:
The weight system is divided into multiple segments: a first weight that moves with the pulley and a second weight that moves independently in a weight guide. This segmentation allows the restoring force to be distributed and controlled at different stages of cable retraction, providing sufficient force even when the cable is fully extended.
Solution Approach 2:
The system transitions from a static weight system to a dynamic one where the second weight can move between different positions in the weight guide. As the cable is retracted, the second weight progressively engages with dampers at different heights, dynamically adjusting the restoring force to match the cable's retraction progress and prevent damage.
2Productivity
If a strong restoring force is applied to quickly recover the cable, then the recovery speed increases, but damage or breakage of the wire and components occurs
Solution Approach 1:
Dampers are pre-installed at different heights in the weight guide to provide progressive cushioning as the second weight descends. This beforehand cushioning absorbs the energy of the recovering cable in controlled increments, enabling fast recovery while preventing shock-induced damage to the wire and components.
Solution Approach 2:
The potential harmful impact of fast cable recovery is converted into a beneficial progressive damping effect. The second weight's descent triggers sequential engagement with dampers, transforming what would be a damaging shock into a controlled, multi-stage energy dissipation process that protects the system while maintaining recovery speed.
3Force
If multiple weights and dampers are added to control the restoring force, then the cable recovery is improved, but the device complexity increases
Solution Approach 1:
The system uses gravity as a natural equipotential force field, where the weights naturally seek their lowest energy state. This eliminates the need for complex mechanical linkages or active control systems, as the gravitational potential energy of the weights automatically provides the restoring force needed for cable retraction.
Solution Approach 2:
The weight guide serves as an intermediary structure that coordinates the motion of multiple weights and the engagement with dampers. This single guiding component simplifies the overall system architecture by providing a unified pathway for force transmission and energy dissipation, reducing the need for additional complex control mechanisms.
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 ensures quick and damage-free recovery of the charging cable by gradually increasing and decreasing the restoring force, minimizing shock and vibration, thus protecting the wire and charger components.
Implementation Method 1
a pulley guiding the wire
Implementation Method 2
a first weight disposed in the pulley guide
Implementation Method 3
a second weight accommodated inside the weight guide and raised by at least one of the pulley guide and the first weight
Implementation Method 4
a damper disposed in the weight guide and on which the second weight is seated when the second weight is lowered
Implementation Method 5
a spring disposed in the damper housing and elastically supporting the damper guide
Data Source
AI summary
A charger comprises a wire; a pulley guiding the wire; a pulley guide in which the pulley is rotatably disposed; a first weight disposed in the pulley guide; a weight guide; a second weight accommodated inside the weight guide and raised by at least one of the pulley guide and the first weight; and a damper disposed in the weight guide and on which the second weight is seated when the second weight is lowered.