Synchronized Parallel Electromagnetic Push Rods for Compact Storage Doors

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Solution Overview

Problem

Existing door opening devices for storage equipment require large electromagnetic push rod structures to provide sufficient force, which increases the height of the equipment and complicates transportation and installation, especially for larger volumes.

Innovation Solution

A door opening device utilizing multiple electromagnetic push rod structures arranged in parallel, connected through an output joint, with adjustable stroke and synchronized operation to reduce thickness while maintaining pushing force, and allocating driving force to the initial stage for enhanced practicality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If a single electromagnetic push rod structure is used to open the door, then the structure is simple, but the pushing force is insufficient and the thickness must be increased to provide adequate force

Engineering Contradiction:
Improvepushing forceVSAvoidthickness of door opening device
Core Design Contradiction:
ForceVSLength of moving object

Solution Approach 1:

The patent divides the single electromagnetic push rod structure into multiple parallel push rods (at least two). Each push rod provides a portion of the total pushing force, allowing the system to achieve sufficient force output while keeping each individual push rod compact with reduced thickness.

Inventive Principle:
Principle #1Segmentation

2Force

If multiple electromagnetic push rod structures are arranged in parallel to increase pushing force, then the pushing force is sufficient, but the thickness of the door opening device increases

Engineering Contradiction:
Improvepushing forceVSAvoidthickness of door opening device
Core Design Contradiction:
ForceVSLength of moving object

Solution Approach 1:

Instead of arranging multiple push rods in the thickness direction (which would increase the 3rd dimension), the patent arranges them in parallel along the width or length direction. This dimensional reconfiguration allows multiple push rods to work together for increased force while maintaining a compact thickness profile.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Force

If the electromagnetic push rod structure is enlarged to provide sufficient pushing force, then the door can be opened stably, but the height of the entire storage equipment increases

Engineering Contradiction:
Improvepushing forceVSAvoidheight of storage equipment
Core Design Contradiction:
ForceVSLength of stationary object

Solution Approach 1:

The patent segments the force generation function across multiple parallel push rods rather than using one large push rod. This segmentation allows the system to achieve the required total pushing force through multiple smaller units, preventing an increase in the overall height of the storage equipment.

Inventive Principle:
Principle #1Segmentation

4Reliability

If a single push rod is used, then the device is compact, but wear or looseness directly impacts door opening performance

Engineering Contradiction:
Improvedurability of door opening deviceVSAvoidnumber of push rod structures
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent connects the multiple push rods to a common output joint through position-adjustable connections. This allows each push rod to be independently positioned and adjusted, ensuring that wear or looseness in one push rod does not compromise the overall system. The local adjustability maintains reliability while managing the complexity of having multiple push rods.

Inventive Principle:
Principle #3Local quality

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 allows for a compact design with increased driving force, improving applicability to larger storage equipment by reducing height and ensuring durability despite wear or looseness, while maintaining stable door opening.

Implementation Method 1

an electromagnetic push rod structure is introduced into the storage equipment to open the door

Methodology Applied
Scientific EffectElectromagnetic force: Lorentz Force

Data Source

PatentEP4137663B1Door opening apparatus and storage device
Publication Date: 2025.08.06 HEFEI MIDEA REFRIGERATOR CO LTD
  • EP4137663B1 patent drawingFigure 1~2
  • EP4137663B1 patent drawingFigure 3~4
  • EP4137663B1 patent drawingFigure 5~6

AI summary

The present application relates to the field of storage equipment and provides a door opening device and storage equipment. The door opening device includes a plurality of electromagnetic push rod structures, where each of the plurality of electromagnetic push rod structures includes a push rod; and a controller electrically connected to the plurality of electromagnetic push rod structures and is configured to drive a plurality of push rods of the plurality of electromagnetic push rod structures to act synchronously. The door opening device according to the present application can reduce the thickness of the door opening device to a large extent under the condition of ensuring the pushing force through synchronous action of the plurality of electromagnetic push rod structures arranged in parallel, which is helpful to improve the application range of the door opening device.