Idler Block Rotating Attachment Using Forked Cam Coupler
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Solution Overview
Problem
Existing rotating attachment assemblies for idler wheels in track-driven undercarriages are either not robust enough or require too much time for assembly and disassembly, failing to balance robustness and efficiency in maintenance operations.
Innovation Solution
A rotating member attachment assembly featuring a cylindrical shaft with a coupler that includes a forked oblong structure and cam surfaces, allowing for quick and secure attachment to the undercarriage frame, along with bushings and thrust washers to manage wear and play, enabling rapid assembly and disassembly while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plurality of bolts is used to attach the idler block to the frame, then the attachment is robust, but the disassembly time increases
Solution Approach 1:
The attachment assembly is divided into modular components: the idler block with integrated forked oblong structure, the shaft with cylindrical configuration, and the coupler with corresponding features. This segmentation allows the assembly to be broken down into manageable parts for rapid disassembly while maintaining structural integrity during operation. The forked oblong structure and cylindrical shaft can be independently removed without requiring removal of multiple bolts.
Solution Approach 2:
The attachment mechanism transitions from a static bolted connection to a dynamic insertion/removal system. The cylindrical shaft fits into the coupler's cylindrical configuration, allowing for quick insertion and extraction movements. The forked oblong structure provides guided movement paths that enable rapid assembly and disassembly while maintaining secure connection during use.
2Productivity
If a quick attachment method is used, then the assembly time is reduced, but the attachment robustness decreases
Solution Approach 1:
The forked oblong structure features an asymmetric geometry with a major axis and minor axis of different lengths. The oblong opening in the coupler is shaped to match this asymmetric forked structure, creating a unique fit that prevents improper installation while enabling quick attachment. The asymmetric cam surfaces provide directional guidance for insertion while ensuring secure locking in the correct position.
Solution Approach 2:
The traditional multi-bolt mechanical fastening system is replaced with a cam-based locking mechanism. The cam surfaces convert simple insertion motion into a secure locked position, providing robust attachment without requiring multiple bolts. The cam action creates mechanical interference that prevents detachment during operation while allowing rapid release when needed.
3Manufacturing precision
If the forked oblong structure is made larger to improve alignment, then the structural complexity increases
Solution Approach 1:
The alignment and attachment functions are merged into the single forked oblong structure. The same geometric features that define the oblong shape also provide alignment guidance and structural connection. The cylindrical configuration of the shaft and coupler combines rotational alignment with axial positioning in one integrated feature, eliminating the need for separate alignment mechanisms.
Solution Approach 2:
The forked oblong structure serves multiple functions simultaneously: it provides structural connection between the idler block and coupler, guides alignment during assembly, defines the insertion path for the shaft, and works with the cam surfaces to secure the attachment. This multi-functionality reduces the need for additional components while maintaining precision alignment.
Data Source
AI summary
A replacement kit includes a first coupler that includes a first inner axial end, a first outer axial end, and a first coupler attachment portion including a first forked oblong structure that defines a first minor axis with a first minor axis length, and a first major axis with a first major axis length that is greater than the first minor axis length, and including a first prong, a second prong disposed axially away from the first prong, and defining a first predetermined axial distance, and a first cam surface disposed between the first prong and the second prong.