Integrated Cotter And Snap Ring Attachment Inspection
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Solution Overview
Problem
Existing methods for checking the attachment of cotters and snap rings on workpieces are inefficient, as they require cumbersome separate inspection jigs and visual checks through small window holes, which are difficult and time-consuming, reducing assembly work efficiency.
Innovation Solution
An attachment checking device and method that includes a cotter contact portion, holding mechanism, retainer coupling portion, and snap ring inspector to easily verify the presence of cotters and snap rings by detecting changes in the coupling state of the retainer when the cotter contact portion is inserted and pulled out, allowing simultaneous inspection of both components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate inspection jigs for snap ring and cotter are used, then inspection coverage is complete, but device complexity and operation time increase
Solution Approach 1:
The patent combines the snap ring inspection function and cotter inspection function into a single integrated inspection device. The inspection device includes a snap ring inspection portion that can detect snap ring attachment status and a cotter inspection portion that can detect cotter attachment status, both operating within the same device structure. This merging eliminates the need to switch between separate inspection jigs, reducing device complexity while maintaining complete inspection coverage.
Solution Approach 2:
The inspection device is designed with multi-functionality to perform both snap ring inspection and cotter inspection. The device includes a retainer holding portion that can hold the retainer, a snap ring inspection portion with detection means for snap ring status, and a cotter inspection portion with detection means for cotter status. This universal design allows one device to replace multiple specialized inspection tools.
2Ease of manufacture
If visual checking through small window holes is used, then no additional inspection device is needed, but measurement precision and ease of operation deteriorate
Solution Approach 1:
The patent introduces detection means as an intermediary between the inspector and the attachment status. The detection means includes a detection portion that detects the attachment status of the snap ring and a detection portion that detects the attachment status of the cotter. These detection mechanisms translate physical attachment states into detectable signals, providing precise measurement without requiring direct visual inspection through small window holes.
3Reliability
If separate inspection jigs are used for snap ring and cotter, then each component can be inspected thoroughly, but productivity decreases due to switching requirements
Solution Approach 1:
The inspection device merges the snap ring inspection function and cotter inspection function into a single integrated system. The device can inspect both components during one continuous operation without requiring the inspector to switch between separate jigs. This combining maintains thorough inspection capability while eliminating the time loss associated with switching tools, thereby improving productivity.
Solution Approach 2:
The inspection device enables continuous inspection of both snap ring and cotter attachment statuses in a single operational sequence. The device includes detection means for snap ring status and detection means for cotter status that can operate sequentially or simultaneously without interrupting the inspection flow. This continuity eliminates the breaks and switching actions required when using separate inspection jigs, maintaining thoroughness while improving efficiency.
Data Source
AI summary
Attachment checking device for checking whether cotter and snap ring are attached to a workpiece, which includes a target component inserted through a shaft, a cotter, a retainer, and a snap ring, includes: a cotter contact portion insertable along an axial direction of the shaft from an opening in the retainer and contactable with the cotter; a holding mechanism that holds the cotter contact portion to be movable forward and backward; a retainer coupling portion that couples to the retainer when the cotter contact portion is inserted into the opening; a cotter inspector that indicates presence or absence of the cotter based on a forward or backward position of the cotter contact portion; and a snap ring inspector that inspects presence or absence of the snap ring based on a change in a coupling state of the retainer when the cotter contact portion is pulled out from the opening.