Spring-Loaded Shifter Cable Attachment Assembly
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Solution Overview
Problem
In conventional automatic transmission systems, securing the shifter cable to the outer manual lever can be challenging due to difficulties in determining proper attachment, leading to potential misalignment and inconsistent coupling.
Innovation Solution
A spring-loaded attachment assembly with an outer and inner frame, an attachment block, and a flexible arm that engages the lever pin, allowing axial displacement to secure the shifter cable, featuring a retention slot and engagement geometry complementary to the lever pin, facilitating secure attachment and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional shifter cable attachment mechanism is used, then the structure is simple, but it is difficult to determine whether the shifter cable has been properly secured to the outer lever
Solution Approach 1:
The patent implements feedback through visual indicators (colored surfaces visible through windows) and auditory feedback (click sounds) that provide real-time information to the installer about the attachment status. When the attachment block is properly positioned, the retention block aligns with the lever pin and the indicator surface becomes visible, confirming correct installation.
Solution Approach 2:
The patent introduces an intermediary indicator mechanism that mediates between the attachment block position and the installer's perception. The retention block with its colored surface acts as an intermediary that translates the internal attachment state into an externally observable signal, allowing the installer to determine proper securing without directly observing the attachment interface.
2Manufacturing precision
If manual alignment of the shifter cable to the outer lever is performed, then the attachment assembly structure remains simple, but misalignment and inconsistent coupling occur
Solution Approach 1:
The attachment assembly performs self-alignment through the spring-loaded mechanism. When the attachment block is inserted, the spring automatically adjusts the position to engage the retention block with the lever pin, eliminating the need for manual alignment by the installer. The system serves itself by automatically achieving proper alignment through its mechanical design.
Solution Approach 2:
The patent employs dynamic elements including the spring-loaded attachment block and flexible retention block that can deflect and adjust during the attachment process. This dynamic behavior allows the components to self-align and accommodate minor position variations, ensuring consistent coupling without requiring precise manual alignment.
3Reliability
If a secure attachment mechanism is implemented, then the shifter cable coupling is reliable, but the device complexity increases
Solution Approach 1:
The patent applies nesting by placing the attachment block within the inner frame, and the retention block within the attachment block structure. The lever pin passes through the nested components in sequence, with each nested element providing a layer of securing. This nested arrangement achieves reliable attachment while compacting the overall structure.
Solution Approach 2:
The attachment assembly is segmented into distinct functional components: the outer frame, inner frame, attachment block, spring, and retention block. Each segment performs a specific function (constraint, propulsion, engagement), and their modular segmentation allows for reliable attachment while managing complexity through functional decomposition.
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 solution provides a secure and adjustable mechanism for attaching the shifter cable, reducing user effort and ensuring proper alignment, while providing visual and auditory feedback for correct engagement, thus enhancing the assembly process and transmission operation.
Implementation Method 1
The inner frame includes a spring extending within the inner frame
Implementation Method 2
The attachment block further includes a flexible arm that defines a protruding latch
Data Source
AI summary
An attachment assembly for securing a transmission shifter cable includes an outer frame and an inner frame disposed at least partially within the outer frame and axially movable relative to the outer frame. The attachment assembly further includes an attachment block disposed at least partially within the inner frame and axially movable relative to the inner frame. An axial displacement of the attachment block secures the inner frame to the outer frame to inhibit axial movement of the inner frame relative to the outer frame.