Vertical Sliding Trolley with Oscillating Rollers for Load Distribution
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Solution Overview
Problem
Existing trolleys with vertical sliding for load lifting devices suffer from inefficient load distribution due to manufacturing tolerances and deformations, leading to non-optimum use of rollers or skids, which results in oversizing of components and reduced loading capacity.
Innovation Solution
The trolley features rolling means with two symmetrically positioned rollers each, allowing for oscillation around a central pivot, ensuring equal load distribution between rollers even under deformation conditions, and enabling adaptation to different load capacities without replacing the entire trolley.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-part trolley with four rollers or skids is used, then the structure is simple, but the load distribution is non-optimum due to manufacturing tolerances and deformations
Solution Approach 1:
The trolley is divided into multiple independent parts: a body portion and a carriage portion that can move relative to each other. The carriage carrying the rollers is segmented from the main trolley body, allowing independent adjustment and optimization of each component's load-bearing characteristics.
Solution Approach 2:
The carriage is made movable relative to the trolley body through a guiding mechanism, transforming the static single-part structure into a dynamic multi-degree-of-freedom system. This allows the rollers to automatically adjust their positions to accommodate manufacturing tolerances and deformations, ensuring optimal load distribution across all four rollers.
2Force
If four rollers or skids are used, then the loading capacity is increased, but the components are oversized due to non-optimum load distribution
Solution Approach 1:
The movable carriage allows all four rollers to actively participate in load-bearing by automatically adjusting their positions. This dynamic adaptation ensures that each roller carries its fair share of the load, eliminating the need to oversized components to compensate for poor load distribution. The system achieves maximum loading capacity with optimally sized components.
3Ease of manufacture
If the trolley is made as a single part, then the manufacturing is simple, but the adaptability to different load conditions is reduced
Solution Approach 1:
By segmenting the trolley into a body portion and a movable carriage portion, the design achieves manufacturability through standardized components while gaining adaptability through the relative movement capability. The carriage can be manufactured separately and assembled with the body, allowing optimization for different load conditions without redesigning the entire trolley.
Solution Approach 2:
The movable carriage mechanism provides universal adaptability to various load conditions, manufacturing tolerances, and deformation scenarios. A single design can handle different maximum loads by adjusting the carriage position, making the trolley versatile across multiple applications without requiring custom designs for each condition.
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 maximizes the load that can be supported by ensuring all rollers are consistently loaded, extends the trolley's application range to various loads, and optimizes component usage by distributing loads evenly across all rollers.
Implementation Method 1
allowing for oscillation around a central pivot, ensuring equal load distribution between rollers even under deformation conditions
Data Source
AI summary
Described is a trolley with vertical sliding for devices for lifting a load including a first portion and a second portion connected by suitable connecting means, and rolling means designed to engage in relative vertical sliding tracks.