Dump Vehicle Cylinder Stabilizer Absorbs Side Loads
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Solution Overview
Problem
Dump vehicles experience unbalanced loads and uneven terrain, leading to damaging bending moments that can cause hydraulic cylinder failure and instability due to side loads, resulting in increased costs from over-designed cylinders and potential seal damage.
Innovation Solution
A stabilizing structure comprising a pair of arms with a telescoping cylinder and a retainer that constrains lateral loads to a guide structure independent of the chassis and dump bed, preventing lateral deflection and distributing side loads effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the hydraulic cylinder is positioned near the transverse center of the bed to resist vertical load, then the cylinder can effectively support the weight of the load, but it cannot resist bending moments caused by unbalanced loads or side loads from unlevel terrain
Solution Approach 1:
The patent introduces a stabilizing structure comprising a pair of arms and a retainer as an intermediary component between the hydraulic cylinder and the external environment. This stabilizing structure acts as a mediator that transfers and distributes side loads and bending moments away from the hydraulic cylinder, allowing the cylinder to focus on its primary function of resisting vertical loads while the stabilizing structure handles the destabilizing lateral forces
2Reliability
If the hydraulic cylinder is over-designed to resist side load moments, then the cylinder can withstand bending moments and prevent failure, but the cost of the dump vehicle increases significantly
Solution Approach 1:
The patent segments the load-bearing functions by separating the vertical load resistance function (handled by the hydraulic cylinder) from the side load and bending moment resistance function (handled by the stabilizing structure). This segmentation allows each component to be optimized for its specific function, preventing the need for an over-designed cylinder that would be required if it had to handle both functions simultaneously
3Strength
If robust cylinder design is used to resist bending moments, then the cylinder can withstand side loads, but the pivotable connections still experience distortion and loosening over time
Solution Approach 1:
The stabilizing structure serves as an intermediary that intercepts and redirects side loads before they can reach the pivotable connections. The pair of arms and retainer create a lateral support system that prevents side loads from being transmitted to the cylinder's pivot bearings, thereby preventing distortion and loosening of these critical connections
4Reliability
If the stabilizing structure is added to laterally stabilize the cylinder, then the cylinder stability and durability are improved, but the device complexity and cost increase
Solution Approach 1:
The stabilizing structure applies local quality enhancement by providing lateral support specifically where needed - around the hydraulic cylinder - without requiring a complete redesign of the entire dump vehicle system. The pair of arms and retainer create a localized stabilization zone that protects the cylinder from side loads while maintaining simplicity in the overall system design
Data Source
AI summary
A dump vehicle comprising a chassis and a dump bed with a cylinder laterally constrained by a stabilizer. The cylinder is supported on a support structure and pivotably connected thereto and to the dump bed. The stabilizer includes a retainer extending at least partially around the cylinder and having arms extending downwardly from the retainer and outwardly from the cylinder. The stabilizer constrains the cylinder laterally, at least partially absorbing side loads imposed on the cylinder.