Universal Joint Assembly With Bolt-Hole Misassembly Prevention
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Solution Overview
Problem
The existing universal joint assemblies in vehicle steering systems are prone to misassembly, which can lead to safety and reliability issues during driving, as the bolt may not be locked into the steering column's groove if not properly aligned, causing separation and difficulty in transmitting steering force.
Innovation Solution
A universal joint assembly with a misassembly prevention member that is elastically movable from a blocked to an open position, preventing the bolt from being coupled when the steering column is not correctly inserted, and automatically returning to block the bolt-hole when the column is separated, ensuring proper alignment during assembly and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bolt-hole is left open for easy assembly, then the assembly process is simplified, but misassembly occurs when the steering column is not properly inserted
Solution Approach 1:
The misassembly prevention member is designed to be movable between a first position (blocking the bolt-hole) and a second position (allowing assembly). It automatically transitions between these positions based on whether the steering column is properly inserted, combining ease of operation with misassembly prevention through dynamic adaptability
Solution Approach 2:
The misassembly prevention member responds to the insertion state of the steering column by automatically returning to the blocked position when the column is not properly inserted or is removed. This feedback mechanism ensures that the bolt-hole is only accessible when proper alignment is achieved
2Reliability
If the misassembly prevention member is always in the blocked position, then misassembly is prevented, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The misassembly prevention member is designed to automatically transition from the blocked position to the open position when the steering column is properly inserted, and automatically return to the blocked position when the column is removed. This self-service mechanism eliminates the need for manual operation or additional assembly steps
Solution Approach 2:
The misassembly prevention member is pre-configured in the blocked position to prevent misassembly before assembly begins. When proper alignment is achieved, it automatically transitions to allow assembly, providing preliminary protection while facilitating correct assembly
3Ease of operation
If the bolt-hole is always accessible, then assembly is simple, but the steering column can be separated during driving
Solution Approach 1:
The misassembly prevention member dynamically adjusts the accessibility of the bolt-hole based on the insertion state. When the steering column is properly inserted and secured, the member transitions to allow bolt access. When the column is removed or not properly inserted, it automatically blocks access, preventing separation during driving
Solution Approach 2:
The misassembly prevention member proactively blocks the bolt-hole to prevent unauthorized or improper assembly attempts before they can occur. It maintains this blocked state until proper alignment is achieved, at which point it automatically transitions to allow secure assembly
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
Prevents misassembly of the steering column, enhancing safety and reliability by ensuring the bolt is locked into the groove only when the column is correctly inserted, and simplifies the assembly and replacement processes while improving space efficiency and design freedom.
Implementation Method 1
a misassembly prevention member coupled to the yoke and elastically movable from a first position in which the bolt-hole is at least partially blocked to a second position in which the bolt-hole is opened
Data Source
AI summary
A universal joint assembly includes a yoke including a serration hole to receive an end portion of a steering column and a bolt-hole to receive a bolt which is used to restrict the steering column received in the serration hole, and a misassembly prevention member coupled to the yoke and elastically movable from a first position in which the bolt-hole is at least partially blocked to a second position in which the bolt-hole is opened, thereby preventing a misassembly of the steering column and improving safety and reliability of the universal joint assembly.