Toolbox Side Wall Fastening via Bolt and Nut
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Solution Overview
Problem
Conventional toolboxes made of plastic have low structural strength, leading to detachment or breakage when subjected to external forces or impacts during movement or use.
Innovation Solution
A combined toolbox design featuring first and second side walls with connection projections and recesses, and fastening assemblies with bolts and nuts, providing strong and secure connections to prevent detachment or breakdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If screws are used to assemble plastic plates, then assembly is convenient and fast, but structural strength is low leading to detachment or breakage under external forces
Solution Approach 1:
The fastening system is segmented into multiple components: connection projections, connection recesses, bolts, and nuts. The connection projections and recesses provide initial alignment and positioning, while the bolts and nuts provide secure fastening. This segmentation allows each component to perform its specific function optimally, achieving both quick assembly and strong connection.
Solution Approach 2:
The invention merges two fastening mechanisms into one system: the snap-fit connection (projections engaging with recesses) and the mechanical fastening (bolts and nuts). The projections and recesses provide quick initial connection, while the bolts and nuts provide additional security and strength. This combination resolves the contradiction by integrating both speed and strength requirements.
2Ease of manufacture
If plastic material is used for toolbox structure, then manufacturing is simple, but connection strength is insufficient when subjected to impact or external forces
Solution Approach 1:
The toolbox employs a composite construction approach, combining plastic components (projections and recesses) with metal fastening components (bolts and nuts). The plastic parts provide manufacturing simplicity and corrosion resistance, while the metal bolts and nuts provide high strength and durability. This composite approach resolves the contradiction between ease of manufacture and connection strength.
3Productivity
If simple screw connection is used between plastic plates, then assembly is fast, but reliability is low due to easy detachment or breakage
Solution Approach 1:
The connection projections and recesses perform a preliminary action by providing initial alignment and positioning of the plastic plates before the bolts and nuts are fully tightened. This preliminary engagement ensures proper positioning and distributes initial loads, enhancing the reliability of the overall connection while maintaining assembly speed.
Solution Approach 2:
The combination of projection-recess engagement and bolt-nut fastening provides beforehand cushioning against detachment or breakage. The projection-recess connection acts as a first line of defense that prevents separation, while the bolts and nuts provide a second line of defense. This layered protection enhances reliability without significantly impacting assembly speed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design allows for easy and quick assembly while offering strong connection strength, resisting external forces and impacts, thus preventing detachment or breakdown.
Implementation Method 1
each said bolt is disposed through one of the plurality of through holes and within one of the plurality of receiving holes and is screwed with one said nut
Data Source
AI summary
A combined toolbox is provided, including: first side walls, each first side wall including connection projections; second side walls, each second side wall including connection recesses, adjacent first and second side walls being connected by engagement of the connection projections within the connection recesses, the first and second side walls defining a receiving space; fastening assemblies, each fastening assembly including a bolt and a nut; wherein one of the adjacent first and second side walls further includes through holes and the other further includes receiving holes which respectively correspond to the through holes; wherein each receiving hole receives one nut, each bolt is disposed through one of the through holes and within one of the receiving holes and is screwed with one nut, and the bolt and the nut of each of the fastening assemblies fixedly secure the adjacent first and second side walls.