Self-Loading Tow Dolly Weight Reduction and Modular Repair
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current self-loading tow dollies are heavy, making them difficult for operators to carry, and have components that are difficult to replace without welding or cutting, as well as inadequate lubrication leading to rotational seizures.
Innovation Solution
A self-loading tow dolly with modular components that can be easily replaced and made from lightweight materials, featuring a lubricant reservoir for 360-degree lubrication of rotating parts, allowing for weight reduction and improved maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If all steel components are used and welded together on the dolly frame, then the dolly is sturdy and reliable, but the weight increases making it difficult for operators to carry
Solution Approach 1:
The dolly is divided into modular components including frame assembly, wheel assembly, axle assembly, and lift mechanism that can be disassembled into multiple sections. This segmentation reduces the weight that operators must carry at one time while maintaining structural integrity through proper connection interfaces.
Solution Approach 2:
The patent employs composite construction combining steel components for high-strength applications with aluminum or other lightweight materials for non-critical structural elements. This composite approach maintains necessary strength while reducing overall dolly weight to mitigate operator strain.
2Reliability
If steel components are welded together for sturdiness, then the dolly is durable, but component replacement requires cutting and welding equipment which operators do not have
Solution Approach 1:
The dolly employs modular components with standardized connection interfaces that allow individual parts such as wheels, axles, and lift mechanisms to be replaced independently. Quick-connect couplings and bolted joints enable field replacement without welding equipment, maintaining reliability through easy component swaps.
Solution Approach 2:
The design allows damaged components to be quickly removed and replaced with new or spare parts, while removed components can be recovered for repair or replacement. This approach maintains operational reliability by enabling rapid component turnover without requiring complex repair procedures in the field.
3Device complexity
If traditional lubrication methods are used, then the structure is simple, but rotational components seize up due to inadequate lubricant coverage
Solution Approach 1:
The patent introduces lubricant reservoirs as intermediary components that store and distribute lubricant to rotational interfaces. These reservoirs act as mediators between the lubrication system and rotating components, ensuring continuous lubricant supply to prevent seizure while adding minimal complexity to the overall dolly structure.
Solution Approach 2:
The lubrication system is designed to automatically service rotational components through integrated reservoirs that provide continuous or periodic lubricant delivery. This self-service approach ensures rotational components remain lubricated without requiring external intervention, maintaining reliability while keeping the system relatively simple.
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 reduces operator strain by decreasing the dolly's weight and enables on-site repairs without metalworking equipment, while ensuring efficient lubrication of rotating components to prevent seizures.
Implementation Method 1
preventing rotational component seizures through improved lubricant coverage within rotating components
Data Source
AI summary
A self-loading tow dolly is described. The inventive tow dolly permits components of the dolly to be easily removed and replaced. The inventive tow dolly also reduces overall weight by using aluminum slotted hubs mated with 8-inch aluminum slotted wheels and by employing dissimilar materials that do not require welding and improves lubrication by providing strategically placed lubricant ports and lubricant reservoirs for rotating components.