Sleeve Securing Element for Chip-Free Pin Pre-Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing securing devices for pre-assembling pin-shaped connecting elements in through-openings of components are complex and costly to produce, often requiring additional machining steps and risk chip formation during insertion.
Innovation Solution
A securing device featuring a sleeve with a flat outer wall and inwardly protruding holding elements, including a recess for latching engagement with a lug, allowing secure axial positioning without outward or inward latching lugs, simplifying production and eliminating the need for additional machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If outwardly and inwardly arched portions are used to hold the securing device and connecting element, then the securing function is improved, but the manufacturing complexity increases due to the need for a step in the bore
Solution Approach 1:
The invention extracts the latching function from the bore structure and transfers it to the securing device itself by providing a recess in the outer wall that engages with a lug on the bore. This eliminates the need for a step in the bore while maintaining the securing function.
Solution Approach 2:
Instead of having the bore structure provide latching features (outwardly arched portions), the invention inverts the approach by having the securing device provide the latching feature (recess) that engages with a simple lug in the bore.
2Reliability
If outwardly protruding holding elements are added to prevent axial displacement, then the securing reliability is improved, but the manufacturing complexity increases due to additional machining steps
Solution Approach 1:
The invention extracts the axial positioning function from the bore structure and transfers it to the securing device by providing a recess that engages with a lug. This eliminates the need for additional machining of the bore while maintaining axial positioning reliability.
Solution Approach 2:
The securing device provides its own axial positioning through the recess-lug engagement, eliminating the need for the bore structure to provide positioning features through additional machining.
Data Source
AI summary
A securing device for a pre-assembly of a pin-shaped connecting element in a through-opening of a component The securing element includes a sleeve with and an inner side and with a flat outer wall having a recess arranged therein, and holding elements each of which protrude inwardly. The holding elements are arranged on the inner side of the sleeve. The recess is arranged into the flat outer wall of the sleeve and provides a latching engagement of a lug which is arranged in the through-opening during the pre-assembly.