Interlocking Rack Assembly for Lightweight Seismic Stability

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Solution Overview

Problem

Conventional rack assemblies for mounting electronic components are heavy, awkward to move, and require tools for assembly and disassembly, using thick materials that increase energy and material costs.

Innovation Solution

A rack assembly design featuring a base frame, side frames, and gussets that are easily assembled and disassembled without tools, using lighter gauge materials and interlocking components for stability, reducing material and energy consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If thick gage steel material is used to ensure strength and stability, then the rack assembly becomes heavier and requires more energy for production and transportation

Engineering Contradiction:
Improvestructural strengthVSAvoidrack weight
Core Design Contradiction:
StrengthVSWeight of moving object

Solution Approach 1:

The rack assembly is divided into separate modular components including base frames, side frames, and gussets that can be assembled together. This segmentation allows each component to be optimized independently and enables tool-free assembly through interlocking features, reducing the need for excessive material in any single component while maintaining overall structural strength.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The rack assembly uses composite construction combining different materials and structural forms - aluminum extrusions for frames, engineered gussets with specific geometric features, and interlocking mechanisms. This composite approach provides high strength-to-weight ratio, achieving structural requirements with lighter gauge materials than conventional solid steel construction.

Inventive Principle:
Principle #40Composite materials

2Strength

If conventional rack assemblies are designed for strength, then they require tools for assembly and disassembly, making them difficult to rearrange and move

Engineering Contradiction:
Improvestructural stabilityVSAvoidassembly ease
Core Design Contradiction:
StrengthVSEase of operation

Solution Approach 1:

The rack is segmented into modular components with standardized interlocking features. The base frames, side frames, and gussets are designed as separate units that connect through geometric interlocking mechanisms, enabling tool-free assembly and disassembly while maintaining structural stability when assembled.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The connection mechanisms incorporate dynamic features that allow for easy assembly and disassembly. The interlocking gusset design includes features that enable components to be connected and disconnected without tools, providing both ease of operation during assembly and structural stability during use.

Inventive Principle:
Principle #15Dynamics

3Strength

If heavy gage materials are used to achieve desired strength, then more energy is needed to form the components and ship the rack

Engineering Contradiction:
Improvecomponent strengthVSAvoidproduction energy
Core Design Contradiction:
StrengthVSUse of energy by moving object

Solution Approach 1:

The design uses composite construction with lighter gauge materials combined in a multi-component configuration. This approach reduces the total material volume and weight compared to solid thick-gauge construction, thereby reducing the energy required for material processing, component formation, and transportation while achieving equivalent structural strength.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

By segmenting the rack into multiple components that connect through interlocking features, the design eliminates the need for excessive material thickness in any single component. This segmentation allows for optimized material usage and reduced production energy while maintaining overall structural integrity.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS9155383B2Rack assembly
Publication Date: 2015.10.13 LEGRAND AV INC
  • US9155383B2 patent drawing
  • US9155383B2 patent drawing
  • US9155383B2 patent drawing

AI summary

A rack assembly includes a base frame having a base member, a lateral brace along a first edge of the base member, and a vertical stub extending upward from a corner of the base member, the vertical stub including first and second stub walls oriented substantially perpendicularly to each other; a side frame including a generally U-shaped vertical bracket; and a generally U-shaped gusset having an upper portion and a lower portion in which the one gusset wall is substantially parallel to and offset with respect to the upper portion. The upper portion of the gusset is attached to the vertical bracket so as to form a first gap between the one gusset wall and a corresponding vertical bracket wall, and a second gap is formed between another bracket wall and the lower portion of the corresponding gusset wall, the gaps being adapted to receive the vertical stub walls.