Knuckle Bracket Asymmetry for Common Jig Warping Correction
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Solution Overview
Problem
Existing methods for differentiating right-side and left-side knuckle brackets in strut-type suspension systems require separate jigs for correcting gripping pieces, increasing labor and complexity due to potential differences in warping caused by cut-away parts for misassembly prevention.
Innovation Solution
A pair of knuckle brackets with a cut-away part and a compression part allows for mechanical identification using a misassembly prevention device, enabling the use of a common jig for correcting gripping pieces by ensuring similar warping patterns through precise positioning of the misassembly detection pin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cut-away part is provided on one of the knuckle brackets for mechanical identification, then assembly mistakes can be prevented, but differences in warping occur depending on the presence or absence of the cut-away part, requiring separate jigs and increasing labor
Solution Approach 1:
The patent applies asymmetry by providing a cut-away part on the bracket main body at a specific position that creates an asymmetric structure. This asymmetric feature enables mechanical identification of the knuckle bracket type (left or right side) through a misassembly prevention device, while the asymmetric design is positioned to minimize its impact on the warping of gripping pieces during welding, allowing both left and right knuckle brackets to be corrected using a common jig.
2Manufacturing precision
If different jigs are prepared for right-side and left-side knuckle brackets, then warping correction can be performed accurately, but labor increases due to jig exchange requirements
Solution Approach 1:
The patent achieves universality by designing the cut-away part and compression part on the bracket main body in such a way that both left-side and right-side knuckle brackets have similar warping patterns. This allows a single common jig to perform warping correction for both types of knuckle brackets, eliminating the need for separate jigs and the labor associated with jig exchange, while still maintaining accurate warping correction.
3Reliability
If visual marks are put on knuckle brackets for identification, then assembly mistakes can be prevented, but mechanical identification cannot be achieved
Solution Approach 1:
The patent uses the cut-away part on the bracket main body as an intermediary feature that enables mechanical identification. The misassembly prevention device includes a detection mechanism that physically interacts with the cut-away part to determine whether the knuckle bracket is of the correct type (left or right side). This mechanical intermediary provides more reliable identification than visual marks alone, as it prevents misassembly at the mechanical level rather than relying solely on visual inspection.
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 reliably prevents assembly mistakes and reduces labor by allowing the same jig to correct gripping pieces for both right-side and left-side knuckle brackets, eliminating the need for separate jigs and ensuring consistent warping patterns post-welding.
Implementation Method 1
a cylindrical bracket main body (20, 50) that is fixed by welding to an outer periphery of an outer tube (D) of a shock absorber
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A knuckle bracket includes a cylindrical bracket main body that is fixed by welding to an outer periphery of an outer tube of a shock absorber and a pair of gripping pieces that extend along an axial direction of the bracket main body and stand up toward the outside from the bracket main body opposing each other. The bracket main body has a cut-away part formed on one side end and a compression part, the compression part being configured to abut a misassembly detection pin of a misassembly prevention device, the misassembly prevention device being configured to identify a type of the knuckle bracket.