Metal Bracket Retaining Fuses With Clamping Lugs
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Solution Overview
Problem
Existing metal brackets for fuse switch disconnectors face challenges in reliable retention and simplified assembly, particularly due to offset and shifted support during assembly movements, requiring additional fastening measures like screws or rivets to handle high closing forces.
Innovation Solution
The introduction of clamping lugs within the receiving compartment, which center and clamp the holding webs of the metal bracket during assembly, allowing for secure positioning without additional fastening, using a design where the holding webs project perpendicularly and are supported by spring-back clamping lugs, and a funnel-shaped slot for the fuse hammer head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal brackets are pressed into the cover to hold them in place, then the metal bracket can be retained in the cover, but the metal bracket is often offset and shifted over several assembly movements until it is supported
Solution Approach 1:
The clamping lugs are pre-formed on the holding webs to automatically center and clamp the metal bracket during the pressing-in operation. This preliminary preparation of clamping features ensures the bracket is immediately positioned correctly as it is inserted, preventing offset and shifted positions that occur with conventional pressing methods.
Solution Approach 2:
The clamping lugs act as an intermediary mechanism between the holding webs and the cover. These lugs engage with recesses in the cover to provide both centering and clamping functions, mediating the connection between the metal bracket and the cover to ensure accurate positioning and reliable retention without direct pressing of the bracket against the cover walls.
2Reliability
If additional fastening measures like screws or rivets are used, then the metal bracket can be securely fastened in the cover, but the assembly process becomes more complex and requires additional assembly movements
Solution Approach 1:
The clamping lugs combine multiple functions into a single integrated feature: they provide centering, clamping, and retention of the metal bracket all in one element. This merging of functions eliminates the need for separate fastening measures like screws or rivets, reducing assembly complexity while maintaining secure fastening reliability.
Solution Approach 2:
The clamping lugs are designed to automatically perform the fastening function during the normal pressing-in operation. The lugs engage with the cover recesses and provide self-centering and self-clamping action, making the bracket secure through its own structural features rather than requiring external fastening components or additional assembly steps.
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
This solution enhances the reliability of metal bracket retention and simplifies assembly by eliminating the need for additional fastening measures, allowing the metal bracket to be easily inserted and secured within the fuse switch disconnector cover, effectively managing high closing forces during lid operation.
Implementation Method 1
spring-back clamping lugs
Data Source
Figure 1~2
Figure 3*
AI summary
The invention relates to a metal bracket (10) for retaining fuses in the cover of a fused interrupter. Said bracket comprises a front section (12) and two wall sections (14) that extend perpendicularly from the front section. According to the invention, the bracket comprises a retaining flange (16) on the ends of the wall sections (14), said flange projecting laterally outwards from the adjacent wall sections.