Cargo Roller Assembly With Load-Adaptive Braking
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Solution Overview
Problem
Existing braking mechanisms in cargo loading systems are too powerful for light loads, leading to skidding and wear on rollers, as they are preset for maximum braking load.
Innovation Solution
A roller assembly with a variable brake load that adjusts in response to the applied unit area load, using pivot links or a roller-on-ramp mechanism to compress or decompress a braking arrangement, ensuring optimal braking force for varying cargo weights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the braking mechanism is preset for maximum braking load, then heavy loads can be controlled effectively, but light loads cannot overcome the braking force causing skidding and wear
Solution Approach 1:
The braking force is made dynamic rather than static. The brake mechanism automatically adjusts its braking force based on the load weight, using a spring-loaded arrangement where the spring compression varies with applied load. This allows the brake to provide maximum force for heavy loads while reducing force for light loads, eliminating skidding and wear.
Solution Approach 2:
The braking parameter (braking force) is changed from a fixed preset value to a variable value that responds to load conditions. The spring compression distance changes as a function of applied load, thereby changing the braking force parameter to match the actual cargo weight, resolving the contradiction between needing strong brakes for heavy loads and gentle brakes for light loads.
2Reliability
If strong brakes are used to prevent loss of control on heavy loads, then safety is improved, but the roller cannot roll under light loads causing skidding
Solution Approach 1:
The brake mechanism transitions from a static strong-brake configuration to a dynamic system where braking force adapts to load conditions. The spring-loaded design allows the brake to be strongly engaged for heavy loads (ensuring safety) while automatically disengaging or reducing force for light loads (enabling rolling), thus resolving the contradiction between safety and operational capability.
Solution Approach 2:
The braking system serves itself by automatically adjusting its own braking force based on the load applied to the roller. The spring mechanism self-regulates the brake engagement level without external control, allowing the system to provide appropriate braking for each load condition independently, thereby maintaining both safety and rolling capability.
3Force
If preset maximum braking force is applied, then heavy cargo can be braked effectively, but friction material wears down and creates flat spots on rollers
Solution Approach 1:
The braking force parameter is changed from a constant maximum value to a variable value that scales with load. This prevents excessive braking force from being applied during light load operations, thereby reducing unnecessary friction and wear on the friction material and roller surface, extending roller service life while maintaining effective braking for heavy cargo.
Solution Approach 2:
The potential harm of excessive braking force causing wear is converted into a benefit by using the applied load itself to regulate the braking force. The load that would otherwise cause wear problems actually becomes the controlling factor that prevents over-braking, transforming the problematic condition into the solution.
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 eliminates slippage and wear under light loads while maintaining suitable braking force for heavy loads, ensuring efficient and durable cargo movement.
Implementation Method 1
a spring configured to apply a compressive force to the brake arrangement
Implementation Method 2
the brake arrangement generates a braking force in response to the compressive force from the spring
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A roller assembly for a cargo loading system comprises an outer surface (200), a housing (202) radially inward from the outer surface, a bearing (204) retained within the housing, a braking arrangement (300) retained within the housing; and an axle (205) disposed at least partially within the housing and configured to engage the bearing, the axle configured to apply a compressive force to the braking arrangement.