Locator Rail with Integrated Tabs for Appliance Door Hinge Alignment
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Solution Overview
Problem
Existing household appliances face challenges in precisely and accurately locating and aligning multiple doors relative to the cabinet, leading to increased assembly complexity and tolerance stack-ups, which affect customer satisfaction and quality perception.
Innovation Solution
A locator rail system with locator tabs and bracket apertures is used to constrain the door hinge bracket in at least three degrees of freedom, ensuring accurate alignment and simplifying the assembly process by eliminating the need for multiple parts and fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple part mounting and aligning systems are used to locate and couple doors to the cabinet, then the door alignment and positioning capability is improved, but the assembly complexity increases and tolerance stack-ups create excessive variation
Solution Approach 1:
The patent combines multiple separate locating parts into a single integrated locator rail that extends along the hinge axis. This rail includes multiple locator tabs that simultaneously provide positioning in multiple degrees of freedom, eliminating the need for multiple separate mounting parts and reducing assembly complexity while maintaining precise door alignment.
Solution Approach 2:
The locator rail is segmented into multiple locator tabs, each responsible for constraining specific degrees of freedom. This segmentation allows the single rail to provide comprehensive positioning functionality that would otherwise require multiple separate components, reducing both part count and assembly complexity while maintaining manufacturing precision.
2Measurement precision
If multiple part mounting systems are used to couple doors to the cabinet, then the positioning capability is improved, but the number of parts increases leading to tolerance stack-ups
Solution Approach 1:
The patent merges multiple separate locating components into a single integrated locator rail assembly. This rail provides all necessary positioning functions through its multiple tabs, reducing the quantity of separate parts while maintaining the measurement precision needed for accurate door location and alignment.
3Manufacturing precision
If multiple fasteners and parts are used for door mounting, then the positioning accuracy is improved, but the assembly time and complexity increase
Solution Approach 1:
The integrated locator rail combines multiple positioning functions into a single component that can be installed as one unit rather than assembling multiple separate parts. This reduces assembly steps and time while maintaining the positioning accuracy required for proper door alignment and coupling to the cabinet.
Data Source
AI summary
An appliance including a case body defining a plurality of case apertures, a locator rail attached to a first side of the case body, the locator rail comprising a plurality of locator tabs, each locator tab of the plurality of locator tabs being engaged with one corresponding aperture of the plurality of case apertures, and a door hinge bracket positioned on a second side of the case body, the door hinge bracket defining a plurality of bracket apertures, each locator tab of the plurality of locator tabs being engaged with one corresponding bracket aperture of the plurality of bracket apertures, wherein the plurality of locator tabs constrains the door hinge bracket in at least three degrees of freedom.