Auxiliary Fitting Mount With Replaceable Threaded Fastener Locking
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Solution Overview
Problem
Existing portable machining apparatuses face high maintenance costs due to damage to internal threaded fasteners from foreign matter like machining chips, often requiring replacement of the entire base, and have complex assembly processes involving separate locking members like compression springs.
Innovation Solution
A portable machining apparatus with a detachable internal threaded fastener and a locking section that can be integrated with either the internal or external threaded fastener, using a nylon nut or leaf spring to simplify assembly and maintenance by allowing the internal threaded fastener to be replaced independently, eliminating the need for a compression spring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an internal threaded fastener is integrated into the base, then the base structure is simplified, but the maintenance cost increases due to replacement of the entire base when the internal threaded portion is damaged
Solution Approach 1:
The internal threaded fastener is segmented from the base structure, allowing it to be replaced independently. The mount includes a detachable internal threaded fastener that can be removed and replaced without replacing the entire base, thus reducing maintenance costs while keeping the base structure relatively simple.
2Ease of repair
If a separate internal threaded fastener is used, then maintenance cost decreases by replacing only the fastener, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
The locking section is merged with either the internal or external threaded fastener, eliminating the need for separate locking members like compression springs. This integration simplifies the assembly process while maintaining the ability to replace only the fastener for maintenance, thus reducing both assembly complexity and maintenance costs.
3Strength
If an external threaded fastener is tightened forcibly, then the auxiliary fitting is securely attached, but the internal threaded portion may be damaged by foreign matter like machining chips
Solution Approach 1:
The locking function is extracted from the internal threaded portion and transferred to a dedicated locking section. This allows the external threaded fastener to be tightened securely to attach the auxiliary fitting, while the locking section prevents loosening without requiring excessive force that could damage the internal threaded portion, thus maintaining both attachment strength and reliability.
4Reliability
If a compression spring is used for locking, then the external threaded fastener is locked, but the assembly process becomes more troublesome and time-consuming
Solution Approach 1:
The locking section is merged with the threaded fastener structure itself, eliminating the need for separate locking components like compression springs. This integration maintains reliable locking functionality while significantly simplifying the assembly process, making it less troublesome and time-consuming.
Data Source
AI summary
An attachment structure for attaching an auxiliary fitting such as a parallel ruler to a portable machining apparatus allows simpler assembly and maintenance. A portable machining apparatus includes a base having a lower surface to be in contact with a workpiece, a machining body supported on an upper surface of the base, and a mount that receives an auxiliary fitting removably attachable to the base. The mount includes an internal threaded fastener detachably supported on the base, an external threaded fastener screwed with the internal threaded fastener to be tightened with the internal threaded fastener to press the auxiliary fitting onto the base, and a locking section that locks the external threaded fastener with respect to the internal threaded fastener.