Adjustable Hinge Assembly for Rotationally Molded Serving Cart Doors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Rotational molding production often results in inconsistent products due to variations in pressure, temperature, and material purity, leading to assembly difficulties and rendering components useless, especially in mobile serving carts with multiple parts.
Innovation Solution
A mobile serving cart with adjustable hinges that allow for precise alignment and locking of door assemblies to side walls, using cart bolts and door bolts with pivot rods and spacers to compensate for manufacturing inconsistencies, enabling six degrees of freedom adjustment for a secure fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rotational molding is used to produce door assemblies and side walls, then manufacturing cost and production speed are improved, but manufacturing precision deteriorates due to inconsistencies in pressure, temperature, and material purity
Solution Approach 1:
The hinge assembly incorporates adjustable door bolts with threaded bodies that allow dynamic repositioning along the hinge axis. This adjustability compensates for dimensional variations in rotationally molded door assemblies, enabling the hinge to adapt to inconsistent door dimensions while maintaining proper alignment and function
Solution Approach 2:
The patent utilizes threaded adjustments on door bolts to change positional parameters of the hinge components. By varying the insertion depth and position of bolts through threading mechanisms, the system compensates for manufacturing tolerances and ensures consistent hinge performance despite variations in molded part dimensions
2Ease of manufacture
If rotational molding is used to produce door assemblies, then manufacturing cost is reduced, but assembly difficulty increases due to misshapen components
Solution Approach 1:
The adjustable hinge assembly allows technicians to dynamically adjust bolt positions during assembly to accommodate misshapen door components. This flexibility simplifies the assembly process by eliminating the need for precise pre-machining or rejection of out-of-tolerance parts, thereby reducing overall manufacturing complexity despite using rotational molding
Solution Approach 2:
The hinge assembly acts as an intermediary mechanism that bridges the gap between inconsistently molded door assemblies and the cart frame. Through adjustable positioning, the hinge mediates the connection, absorbing dimensional variations and enabling successful assembly without requiring high precision from the molded components themselves
3Device complexity
If fixed hinge assemblies are used with rotationally molded components, then device complexity is reduced, but reliability deteriorates due to production inconsistencies
Solution Approach 1:
The hinge assembly incorporates adjustable door bolts with threaded bodies that allow dynamic repositioning along the hinge axis. This adjustability compensates for dimensional variations in rotationally molded door assemblies, enabling the hinge to adapt to inconsistent door dimensions while maintaining proper alignment and function
Solution Approach 2:
The patent utilizes threaded adjustments on door bolts to change positional parameters of the hinge components. By varying the insertion depth and position of bolts through threading mechanisms, the system compensates for manufacturing tolerances and ensures consistent hinge performance despite variations in molded part dimensions
Data Source
AI summary
A mobile serving cart with adjustable hinges that allows for the production inconsistencies associated with rotational molding. The cart comprises a plurality of door assemblies, each door assembly comprising at least two hinge assemblies, at least one hinge assembly being disposed at the upper portion of the door assembly, and at least one other hinge assembly being disposed at the lower portion of the door assembly. Each hinge assembly comprises at least two door bolts, at least one cart bolt, and a pivot rod. The cart rod is disposed between the at least two door bolts at an orientation that is orthogonal to the at least two door bolts. The hinge assemblies provide a means for the rotationally molded door assemblies and side walls of the cart to be tightly or snuggly coupled together despite the manufacturing inconsistencies inherent to the rotational molding process.