Oven Rack Linkage Assembly for Tool-Free Extension
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Solution Overview
Problem
Existing oven rack extension and retraction systems are overly complex and difficult to assemble and disassemble, making them inefficient for use in appliances.
Innovation Solution
A simplified rack system that includes a door link, coupler links, and racks, where the bracket allows for translationally coupled movement of the racks with the appliance door, enabling easy extension and retraction without requiring additional framing or support structures, and can be assembled and disassembled manually without tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional rack extension and retraction systems are used, then racks can be extended and retracted automatically, but the system becomes overly complex and difficult to assemble and disassemble
Solution Approach 1:
The system is divided into separate modular components: a door link attached to the appliance door, coupler links that connect racks to each other and to the door link, and brackets with multiple attachment sites. This segmentation allows each component to be simple and easily assembled/disassembled while working together to achieve the rack extension function
Solution Approach 2:
The coupler links serve multiple functions: they connect racks to each other, connect racks to the door link, and enable both extension and retraction movements. The brackets with multiple attachment sites provide universal connectivity options, allowing the same component to work in different configurations without requiring additional specialized parts
2Extent of automation
If complex linkage systems are used for rack extension, then automatic extension upon door opening is achieved, but assembly and disassembly require tools and are difficult
Solution Approach 1:
The system is designed to be self-assembling through its linkage mechanism. When the door link is attached to the appliance door and the coupler links are connected to the racks and door link, the system automatically achieves the extended configuration upon door opening without requiring additional adjustment or tool-assisted assembly
Solution Approach 2:
Instead of designing a complex mechanism that requires precise assembly to achieve automatic extension, the invention inverts the approach by using simple linkages that naturally produce the extension motion through their geometric arrangement, eliminating the need for complex control mechanisms or precise assembly procedures
3Stability of the object's composition
If multiple support structures and framing are added to the rack system, then rack stability is improved, but the system complexity and number of components increases
Solution Approach 1:
The door link serves dual purposes: it acts as the actuation mechanism for rack extension and simultaneously provides the primary support structure for the racks during extension. The coupler links combine the functions of mechanical connection and structural support, eliminating the need for separate support framing or additional stability-enhancing components
Data Source
AI summary
A rack system for an appliance is provided. The rack system includes a door link, a first coupler link, a first rack, a bracket, a second coupler link, and a second rack. The door link is attached to an appliance door. The first coupler link is attached to the door link and connected to the first rack. The bracket is attached to either the first rack or the second rack. The second coupler link is attached to the bracket at one of the sites for attachment and connected to whichever one of either the first or second racks to which the bracket is not attached. The linear movement of the first and second racks can be non-staggered or staggered depending on the attachment site of the bracket to which the second coupler link is attached.