Link Assembly Index Pin Orientation Adjustment
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Solution Overview
Problem
Conventional three-point hitch assemblies require complete uncoupling of links to change orientation, which is cumbersome due to the weight and difficulty in manipulating heavy links when not held together.
Innovation Solution
A link assembly with a coupling member featuring spaced apart coupling plates and index bores allows for adjustable coupling between links using a load pin and index pin, enabling orientation changes without complete uncoupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a two-piece lift link assembly with a pin plate and pins is used to allow orientation changes, then the links can be configured in different orientations, but the pin plate and both pins must be completely removed from the links to change orientation, making the links heavy and difficult to manipulate when uncoupled
Solution Approach 1:
The coupling mechanism is segmented into a load pin for primary structural coupling and an index pin for orientation positioning. This allows the index pin to be removed independently for orientation changes while the load pin remains in place to maintain basic coupling and control of the links.
Solution Approach 2:
The index pin acts as an intermediary element that enables orientation adjustment without requiring complete uncoupling. By providing a dedicated positioning mechanism separate from the load-bearing connection, it mediates between the need for adaptability and ease of operation.
2Adaptability or versatility
If the pin plate and both pins are removed to change link orientation, then the links can be reconfigured, but the heavy links become difficult to manipulate when nothing holds them together
Solution Approach 1:
The pin removal requirement is segmented into partial removal (index pin only) rather than complete removal of all coupling elements. This maintains sufficient coupling to control the heavy links while allowing orientation changes.
Solution Approach 2:
Instead of requiring complete uncoupling (excessive action), the invention uses partial uncoupling by removing only the index pin. This provides sufficient freedom for orientation adjustment without the full complexity and difficulty of complete disassembly.
3Device complexity
If a conventional pin plate design is used, then the structure is simple, but complete removal is required to change orientations, increasing the time and complexity of adjustment
Solution Approach 1:
The coupling function is segmented into load-bearing (load pin) and positioning (index pin) roles. This segmentation allows selective removal of only the positioning element for orientation changes, reducing adjustment time while maintaining structural simplicity.
Solution Approach 2:
The coupling mechanism transitions from a static all-or-nothing coupling system to a dynamic system where the index pin can be selectively engaged or disengaged. This provides intermediate states that facilitate faster reconfiguration without compromising structural integrity.
Data Source
AI summary
A link assembly for a hitch includes a first link and a second link. The second link has first and second spaced apart bores extending therethrough. A coupling member is attached to an end of the first link. The coupling member includes first and second spaced apart coupling plates. The coupling member has a load bore extending through the first and second coupling plates and has a plurality of index bores extending through the first and second coupling plates. A load pin is receivable by the load bore and the first bore, and pivotally couples the second link to the first link. An index pin is removably receivable by the second bore and a selected index bore, and the index pin is movable independently of the load pin.