Tool-Free Blocking Key for Wiper Linkage Transport
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Solution Overview
Problem
Existing wiper mechanism linkages for motor vehicles face challenges in transportation and installation due to articulation, requiring locking elements that are often single-use and necessitate cutting tools, resulting in debris and increased costs.
Innovation Solution
A locking key with a U-section and radial fingers is designed to lock the linkage in a transport position without tools, allowing for easy installation and removal, reducing waste by remaining on the linkage post-installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If locking elements are used to secure the linkage in transport position, then the linkage stability is improved, but the ease of operation deteriorates because cutting tools are required to release the linkage
Solution Approach 1:
The locking element transitions from a static locked state to a dynamic unlocked state through rotational movement. The pivotable connection allows the locking element to rotate between a locked position (where the blocking surface engages the link) and an unlocked position (where the blocking surface disengages), enabling tool-free release while maintaining stable locking during transport
Solution Approach 2:
The locking element is designed to be manually operable without external tools. The release mechanism uses a simple pulling motion on the release portion that automatically rotates the locking element about its pivot connection, allowing the user to unlock the linkage themselves without requiring cutting tools or specialized equipment
2Ease of manufacture
If single-use locking elements are used, then the ease of manufacture is improved, but the loss of substance increases due to debris production and waste processing
Solution Approach 1:
Instead of discarding the locking element after single use, the design allows it to be recovered and reused. The locking element remains attached to the bearing housing and can be used repeatedly for securing the linkage during transport and installation, eliminating the need to discard it and preventing waste material generation
Solution Approach 2:
The locking element serves multiple functions: it locks the linkage in transport position, allows tool-free release, and can remain on the bearing housing for future use. This multi-functional design replaces single-use locking elements with a reusable component that provides ongoing utility without generating waste
3Stability of the object's composition
If cutting tools are used to release the linkage, then the stability of the locking is improved, but the device complexity increases due to tool requirements
Solution Approach 1:
The locking element is designed to be manually operable without external tools. The release mechanism uses a simple pulling motion on the release portion that automatically rotates the locking element about its pivot connection, allowing the user to unlock the linkage themselves without requiring cutting tools or specialized equipment
Solution Approach 2:
The pivot connection acts as an intermediary mechanism that translates a simple pulling motion on the release portion into rotational movement of the locking element. This intermediary mechanism enables tool-free operation while maintaining secure locking, replacing the need for complex cutting tools with a simple mechanical leverage system
Data Source
AI summary
The present invention concerns a key (1) for locking a link including a U-section and a crank of a linkage of a wiper mechanism in a transport position, characterized in that it comprises:a shaft (11) having at one end a radial holding excrescence (13) and at the other end an enlarged head (15) intended to cooperate with a hollow part of the U-section forming the link, anda first radial finger (17) configured to be housed in a slot for locking the link in the transport position.