Tool Holder Chuck Geometry for Easier Nut Assembly
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Solution Overview
Problem
Conventional tool holders face difficulties in assembly due to the need for precise angle adjustment of the chuck relative to the clamping nut, making the process time-consuming and not cost-effective.
Innovation Solution
The tool holder design includes a chuck with an annular groove, a nut positioning portion, and cutting surfaces on the nut positioning portion, allowing the clamping nut's protruding edge to pass by the cutting surfaces and engage in the annular groove, simplifying the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the chuck is assembled with the clamping nut having a protruding edge and annular recess configuration, then the disassembly convenience is improved, but the assembly difficulty increases due to the need for precise angle adjustment
Solution Approach 1:
The cutting surfaces are pre-formed on the nut positioning portion at specific angles during manufacturing. This preliminary action creates predetermined pathways that guide the protruding edge during assembly, eliminating the need for operators to manually adjust angles and significantly reducing assembly difficulty while maintaining the disassembly convenience provided by the protruding edge and annular recess configuration
Solution Approach 2:
The cutting surfaces act as an intermediary element between the nut positioning portion and the protruding edge. These cutting surfaces create a controlled interaction zone that facilitates the engagement process by providing a gradual transition path, allowing the protruding edge to smoothly enter the annular groove without requiring precise manual alignment
2Reliability
If continuous adjustment of the chuck angle is performed during assembly, then the protruding edge can be engaged in the annular groove, but the assembly time increases making it not cost-effective
Solution Approach 1:
The cutting surfaces are pre-formed on the nut positioning portion at specific angles during manufacturing. This preliminary action creates predetermined pathways that guide the protruding edge during assembly, eliminating the need for operators to manually adjust angles and significantly reducing assembly time while maintaining engagement reliability
Solution Approach 2:
The cutting surfaces enable the assembly process to be self-guiding. When the chuck and clamping nut are brought together, the geometry of the cutting surfaces automatically guides the protruding edge into the correct position and orientation, allowing the components to self-align without requiring continuous manual adjustment or external intervention
Data Source
AI summary
A tool holder has a holder body, a chuck, and a clamping nut. The chuck has an annular groove, a nut positioning portion, and a cutting surface. The cutting surface is formed on a periphery of the nut positioning portion by cutting. The clamping nut has a protruding edge. When assembling the chuck and the clamping nut, the cutting surface allows the protruding edge to easily avoid and pass by the nut positioning portion, enter the annular groove, and be engaged in the annular groove, which lowers difficulty of assembly. During disassembly, the protruding edge is configured to abut the nut positioning portion, which allows the chuck to be easily detached from the holder body together with the clamping nut when unscrewing the clamping nut from the holder body.