Vehicle Hinge Pin Assembly with Retaining Element
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Solution Overview
Problem
Existing joint devices in interior equipment, such as vehicle parts, face challenges in ensuring that pins are fully inserted into recesses during assembly, leading to potential jamming and insecure connections due to inaccurate fitting.
Innovation Solution
A joint device design featuring a pin that moves from a pre-assembly position to a final assembly position using a holding element with oblique contact surfaces, preventing reverse movement and ensuring secure engagement without relying on spring force, allowing for a more precise and stable connection between parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If spring force is used to press the pin into the recess during assembly, then the pin can be forced into position, but the assembler cannot verify whether the pin is actually pressed all the way to the stop, creating risk of jamming or inaccurate fitting
Solution Approach 1:
A tool with a retaining element acts as an intermediary during assembly. The retaining element is inserted through a shaft into a seat, where it directly pushes the pin into the recess until it engages with the stop. This intermediary mechanism ensures precise positioning and allows verification that the pin is fully inserted, eliminating the uncertainty of spring-based forcing.
2Ease of operation
If the pin is made movable between pre-assembly and final assembly positions, then assembly flexibility is improved, but the connection stability is reduced until the final position is reached
Solution Approach 1:
The pin is preliminarily positioned in a pre-assembly position where it overlaps more with the bore, allowing easy alignment and insertion. The retaining element is then used to perform the final action of pushing the pin into the recess to its final assembly position, where it engages with the stop. This two-stage process maintains flexibility during assembly while ensuring stability in the final connected state.
Data Source
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AI summary
The invention relates to a joint device with a first part (11) which is pivotable relative to a second part (12) about a pivot axis (a), wherein the first part (11) comprises at least one bore (13) and the second part (12) comprises at least one recess (15a, 15b), wherein at least one pin (17a, 17b) coaxial to the pivot axis (a) is arranged in a final assembly position with a first longitudinal region in the bore (13) and with a second longitudinal region in the recess (15a, 15b) and the pin (17a, 17b) is movable between a pre-assembly position, in which the pin (17a, 17b) is received with a larger overlap in the bore (13) or in the recess (15a, 15b) with respect to the final assembly position and the final assembly position.The special feature is that at least one retaining element (18) can be arranged in a seat (28) by means of a shaft (31) in such a way that the pin (17a, 17b) can be moved from the pre-assembly position to the final assembly position by the retaining element (18) and that the retaining element (18) is arranged in the final assembly position in such a way that it prevents the pin (17a, 17b) from moving back from the final assembly position to the pre-assembly position.