Linear Hinge Assembly for Flush-Mount Appliance Door Clearance
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Solution Overview
Problem
Conventional refrigerator appliances with single pivoting hinges often cause interference and wear between the doors and adjacent cabinetry, particularly in flush-mount designs, due to the lack of a mechanism that allows the doors to translate away from the cabinetry as they open and close.
Innovation Solution
A linear hinge assembly that includes a bearing assembly, an elongated shaft, a door linkage, and a cabinet linkage, allowing the door to translate along a horizontal axis while rotating, thereby minimizing contact with adjacent cabinetry and reducing gasket wear by moving the door away from the cabinet as it opens and closes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single pivoting hinge is used to rotate the door, then the door can open and close, but the door or panel mounted thereon rubs or conflicts with adjacent cabinetry
Solution Approach 1:
The hinge assembly adds a translation dimension to the traditional rotational motion. The elongated shaft translates linearly along the translation axis while the door rotates, moving the door along a path that avoids contact with adjacent cabinetry during opening and closing operations.
Solution Approach 2:
The elongated shaft acts as an intermediary between the rotating door and the cabinet. It converts pure rotational motion into a combined translation-rotation motion, mediating the conflict between door operation and cabinetry clearance.
2Shape
If the door is designed to sit flush with adjacent cabinets, then the appearance is improved, but the door frequently experiences gasket rub or wear
Solution Approach 1:
The hinge assembly dynamically adjusts the door position during operation. When the door is closed, it maintains a flush appearance with the cabinets. When opened, it translates away from the cabinets to prevent gasket rub, providing the best of both aesthetics and durability.
Solution Approach 2:
The hinge assembly preliminarily positions the door on a translation path that prevents contact with adjacent cabinetry before the door is even opened, proactively avoiding gasket wear while maintaining flush appearance when closed.
3Device complexity
If a single pivoting hinge is used, then the structure is simple, but the door or panel mounted thereon conflicts with adjacent cabinetry
Solution Approach 1:
The hinge assembly segments the motion into two independent components: translation along the elongated shaft and rotation at the pivot axis. This segmentation allows each component to perform its function optimally while avoiding cabinetry contact.
Solution Approach 2:
The elongated shaft serves as an intermediary mechanism that adds translational capability to the rotational hinge, creating a more complex but effective system that resolves the conflict between simple structure and cabinetry clearance.
Data Source
AI summary
A domestic appliance may include a cabinet, a door, and a linear hinge coupling the door to the cabinet. The linear hinge may include a bearing assembly, an elongated shaft, a door linkage, and a cabinet linkage. The bearing assembly may be mounted to the cabinet. The elongated shaft may be received within the bearing assembly and slidable along a translation axis on the bearing assembly. The elongated shaft may define a first shaft pivot axis perpendicular to the translation axis and a second shaft pivot axis parallel to the first shaft pivot axis. The door linkage may couple the door to the elongated shaft. The door linkage may be pivotally connected to the elongated shaft at the first shaft pivot axis. The cabinet linkage may couple the cabinet to the elongated shaft. The cabinet linkage may be pivotally connected to the elongated shaft at the second shaft pivot axis.