Trailer Device Spring Pretensioning for Lifting Load
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Solution Overview
Problem
Conventional trailer devices for agricultural vehicles are limited by the output capacity of hydraulic lifting systems, restricting the permissible lifting load due to constructional space restrictions and hydraulic output constraints.
Innovation Solution
Incorporating at least one spring element between the base frame and the frame part to exert a pretensioning force, allowing for increased permissible lifting loads without altering the lifting apparatus design, and utilizing a dual-acting hydraulic cylinder or adjusting drives with hydraulic or electric motors to manage the forces in both actuating directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the output capacity of the hydraulic lifting system is increased to raise the permissible lifting load, then the permissible lifting load increases, but constructional space restrictions and hydraulic output constraints prevent simple increases
Solution Approach 1:
A spring element is introduced as a counterweight mechanism that stores potential energy and exerts an upward pretensioning force on the frame part. This spring element assists the hydraulic lifting system by providing a portion of the lifting force, thereby increasing the permissible lifting load without requiring a proportional increase in hydraulic system capacity or constructional space.
2Ease of operation
If the hydraulic cylinder is made dual-acting to manage forces in both actuating directions, then the system can handle both raising and lowering forces, but the device complexity increases
Solution Approach 1:
The hydraulic cylinder is configured as a dual-acting cylinder that can exert force in both extending and retracting directions. This multi-functional configuration allows the same hydraulic component to handle both the raising operation (overcoming spring pretensioning) and the lowering operation (controlling descent against spring force), eliminating the need for separate mechanisms for each direction.
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 configuration enhances the hydraulic output utilization, allowing for a maximum total lifting force that is the sum of the lifting apparatus' adjusting force and the spring element's pretensioning force, thereby increasing the permissible lifting load while maintaining the existing lifting apparatus design and load-bearing components.
Implementation Method 1
At least one spring element is arranged between the base frame and the frame part, such that the spring element exerts a pretensioning force on the frame part assisting the raising of the coupling element
Data Source
AI summary
A trailer device for an agricultural vehicle includes a frame part and a guide part longitudinally, displaceably mounted in the frame part. The guide part includes a coupling element provided on an end face. The frame part is pivoted by a lifting apparatus for raising and lowering the coupling element relative to a base frame for attaching to a load-bearing vehicle structure. The device includes at least one spring element arranged between the base frame and the frame part such that the spring element exerts a pretensioning force on the frame part for assisting the raising of the coupling element.