Concealed-Lock Circlip for Secure Axial Retention
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Solution Overview
Problem
Existing snap rings used for axial fixation of components can come off due to unfavorable tolerances and high loads, and existing locks do not effectively prevent improper dismantling or misuse during disassembly.
Innovation Solution
A locking ring arrangement with a ring segment and closure element, featuring a locking device covered on the side facing away from the contact surface, which forms a snap connection to secure the component axially and prevent disassembly, utilizing a snap spring or film hinge for easy assembly and high rigidity, and made of plastic for design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism is added to prevent snap ring opening, then security against improper disassembly is improved, but device complexity increases
Solution Approach 1:
The locking device is integrated into the closure element itself, merging the closing function and locking function into a single component. The closure element contains protrusions that engage with recesses in the ring segment, creating a locked state without requiring separate locking components.
Solution Approach 2:
The closure element automatically locks when inserted into the ring segment through self-aligning protrusions and recesses. The elastic deformation of the closure element during insertion causes the protrusions to engage with the recesses, creating a locked state without external intervention.
2Ease of operation
If the locking device is made accessible for disassembly, then ease of operation is improved, but security against improper disassembly deteriorates
Solution Approach 1:
The closure element is designed to be inserted in a specific direction that automatically engages the locking protrusions with the recesses before the final positioning is reached. This preliminary engagement prevents improper disassembly while allowing authorized disassembly through the same insertion path in reverse.
Solution Approach 2:
The locking mechanism works by inserting the closure element into the ring segment to lock, and removing it by pulling out in the same direction. This inverted approach compared to traditional locks allows simple operation while maintaining security, as the same path is used for both locking and unlocking.
3Reliability
If additional components are added to prevent unauthorized disassembly, then security is improved, but manufacturing cost increases
Solution Approach 1:
The locking function is merged into the closure element itself, eliminating the need for separate locking components. The closure element is manufactured as a single piece with integrated locking protrusions, reducing part count and manufacturing complexity.
Solution Approach 2:
The closure element and ring segment are both made from similar plastic materials, allowing for consistent manufacturing processes and material sourcing. This homogeneity in material selection simplifies supply chain management and manufacturing operations.
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
The locking ring effectively prevents improper disassembly and misuse by making the locking device inaccessible after assembly, ensuring visible damage if attempted disassembly occurs, thus securing components like switching valves and air spring housings in vehicles against unwanted dismantling.
Implementation Method 1
After assembly of the ring segment, it opens again due to springback forces or is opened by a device.
Data Source
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Figure 3
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AI summary
The invention relates to a circlip (10) for securing a component (11), comprising a ring segment (13), which has an outer circumference (16) for fixing the circlip (10) in the axial direction (A), and a recess (14) extending along a circumferential direction (U) of the ring segment (13), and a closure element (15) for closing the recess (14), wherein the ring segment (13) forms a contact surface (17) for fixing the component (11) in the axial direction (A), and wherein the circlip (10) has a locking device (18) for locking the closure element (15) in the recess (14), which locking device is concealed at least towards a side of the circlip (10) facing away from the contact surface (17).