Powered Trailer Door Drive for Automated Dock Operation

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Solution Overview

Problem

Existing trailer door systems require manual operation, which can be inefficient and unsafe, especially in vehicle loading docks where automated control is desirable for safety and efficiency.

Innovation Solution

Automated trailer door systems that utilize internal drive components powered by the trailer or tractor, controlled by a controller, and interfaced with guide tracks and motors to open and close trailer doors, with power delivery and charging systems integrated for seamless operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If manual operation of trailer doors is used, then device complexity is reduced, but productivity and safety are worsened

Engineering Contradiction:
Improvedoor operation efficiencyVSAvoiddoor system complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The trailer door system performs automated opening and closing operations without requiring manual intervention. The motorized drive mechanism automatically actuates the door based on control signals, enabling the system to serve itself and eliminating the need for dock personnel to manually operate heavy trailer doors, thereby improving productivity while maintaining acceptable system complexity through standardized components

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces manual mechanical operation with an automated motorized system. A motor coupled to a drive mechanism (such as a screw drive, gear drive, or belt drive) substitutes for human physical effort in opening and closing trailer doors. This mechanical substitution enables automated control while managing system complexity through the use of conventional motorized actuation mechanisms

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

2Reliability

If manual operation of trailer doors is used, then device complexity is reduced, but safety is worsened

Engineering Contradiction:
ImprovesafetyVSAvoiddoor system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The automated door system eliminates the need for dock personnel to physically interact with heavy trailer doors, allowing the system to operate autonomously. This self-service capability improves safety by removing human operators from hazardous positions near moving doors and heavy cargo, while the added safety features (sensors, controlled motion) are integrated into the automated control system without excessive complexity

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent introduces an automated control system as an intermediary between the operator and the physical door mechanism. This intermediary layer includes control circuits, sensors, and motor control logic that mediate the opening and closing actions, improving safety by providing controlled, predictable door movement and eliminating direct human contact with moving parts, while managing complexity through modular control architecture

Inventive Principle:
Principle #24Intermediary (Mediator)

3Productivity

If automated door systems with integrated power delivery are used, then productivity is improved, but device complexity is worsened

Engineering Contradiction:
Improvedoor operation efficiencyVSAvoidpower delivery system complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The trailer electrical system is designed to perform multiple functions: it powers the door actuation motor, charges onboard batteries, and can interface with external power sources at the dock. This multi-functional power delivery system improves productivity by enabling automated door operation while managing complexity through integrated electrical architecture that consolidates power management functions across different operational modes (autonomous and dock-connected)

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentEP4363685B1Powered trailer systems
Publication Date: 2025.12.10 ASSA ABLOY ENTRANCE SYST AB
  • EP4363685B1 patent drawingFigure 1A
  • EP4363685B1 patent drawingFigure 1B
  • EP4363685B1 patent drawingFigure 1C~1D

AI summary

A powered trailer door operating system (100) for use with a trailer door (TD), comprising: a guide track (110, 112) having a lower guide track portion (110a, 112a) configured to position the trailer door (TD) at a closed position and an upper guide track portion (110b, 112b) configured to position the trailer door (TD) at an open position; drive support (120) coupled to the upper guide track portion (110b, 112b), the drive support (120) having a central cavity and a slot (128) extending through the drive support into the central cavity, the slot positioned (128) longitudinally along at least a portion of the drive support (120); a drive shaft (122) positioned within the central cavity (128); and a carriage (134) slidingly coupled to the drive support (120) and operably coupled to the trailer door (TD), wherein the carriage (134) is operably engaged with the drive shaft (122) through the slot (128) such that rotation of the drive shaft (122) causes the carriage (134) to translate along the drive support (120), thereby moving the trailer door (TD) between the closed position and the open position.