Moulded part, method for production and use of such a moulded part for screwing of bolts with a thread section and a tool approach
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Solution Overview
Problem
The existing methods for attaching furniture castors to cabinet bodies are cumbersome, requiring tools and washers, leading to increased production costs and the risk of washer loss or misplacement, and complicating the assembly and potential dismantling processes.
Innovation Solution
A molded part with a force distribution section, a tool section, and a lever section that allows for tool-free attachment of bolts with a threaded section and tool attachment, distributing clamping force over a large area and preventing washer loss, using a design with a polygonal inner profile to accommodate standard tool attachments and providing a secure fit without additional tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a washer is used to distribute clamping force during bolt assembly, then the clamping force is distributed evenly across the furniture body, but the washer can easily be lost or slip off the bolt during assembly
Solution Approach 1:
The patent combines the washer function and tool attachment function into a single integrated molded part. The molded part includes a washer section that distributes clamping force and a tool section with a lever arm for tool-free assembly. This eliminates the need for separate washers and tools, preventing washer loss while maintaining force distribution.
Solution Approach 2:
The molded part serves multiple functions simultaneously: it acts as a washer for force distribution, a tool attachment for tightening, and a lever arm for mechanical advantage. This multi-functional design eliminates the need for separate components and tools during assembly.
2Strength
If a tool is used to tighten the bolt after screwing, then the screw connection is secured, but the tool becomes superfluous after assembly and increases production costs
Solution Approach 1:
The molded part enables the bolt to be tightened without external tools. The lever section of the molded part acts as a built-in tool attachment that provides mechanical advantage for tightening the bolt directly during assembly, eliminating the need for separate wrenches or tools.
Solution Approach 2:
The molded part serves as both the fastening element and the tightening tool. The lever arm integrated into the molded part allows the assembler to tighten the bolt using the molded part itself, eliminating the need for external tools.
3Strength
If traditional assembly methods with separate washers and tools are used, then the bolt can be secured to the furniture body, but the assembly process becomes cumbersome and time-consuming
Solution Approach 1:
The patent merges the washer, tool attachment, and lever arm into a single molded part that is integrated with the bolt. This allows the assembler to perform all functions (force distribution, tool attachment, and leverage) in one component, significantly speeding up the assembly process.
Solution Approach 2:
The molded part is pre-assembled with the bolt before delivery, with the lever arm positioned for immediate use during installation. This preliminary preparation eliminates the need for separate assembly steps and tools during installation.
Data Source
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AI summary
The invention relates to a molded part 14 for screwing bolts 10 with a threaded section 13 and a tool attachment 12. For this purpose, the molded part 14 comprises a flat, in particular round, force distribution section 15. The force distribution section 15 comprises a first side surface 16 and one lying opposite the first side surface 16 second side surface 17. Furthermore, the force distribution section 15 includes an opening 28. The first side surface 16 is essentially planar. In addition to the force distribution section 15 , the molded part 14 has a tool section 18 which adjoins the force distribution section 15 on the second side face 17 of the force distribution section 15 . The tool section 18 has an inner profile 20 arranged concentrically to the opening 28 . The largest diameter 34 of the inner profile 20 is larger than the largest diameter 30 of the opening 28. In addition, the molded part 14 has at least one lever section 24a, 24b, which is adjacent to the force distribution section 15 and/or the tool section 18. The lever section 24a, 24b serves to exert a torque on a point of application lying in the interior 27, in particular in the center, of the inner profile 20. The invention also includes a method for producing the molded part 14 and the use of the molded part 14 for screwing or tightening bolts 10 with a threaded section 13 and with a tool attachment 12.