Track Roller Retainer Assembly Eliminates Central Flange
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Solution Overview
Problem
Conventional track rollers for tracked vehicles have a complex assembly due to the presence of multiple parts, including a central flange, which complicates the assembly process.
Innovation Solution
A track roller design featuring a cylindrical roller shell, a shaft, first and second retainers, first and second holding rings, and seal assemblies, where the shaft is inserted into the roller shell, and the retainers are press-fitted to the outer periphery, with holding rings fixing the retainers to prevent axial movement, eliminating the need for a central flange and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a central flange is used in the shaft, then the load-bearing capability is improved, but the device complexity increases due to numerous parts
Solution Approach 1:
The invention extracts and removes the central flange from the shaft, eliminating the need for multiple retaining rings and complex assembly. The load-bearing function is transferred to the end faces of the shaft itself, which directly contact the retainers, thereby reducing part count while maintaining strength
Solution Approach 2:
The invention merges the load-bearing function previously performed by the central flange into the shaft's end faces. The shaft's end faces directly bear the axial loads through press-fit retainers, combining the shaft's structural role with the load-bearing function, thus eliminating separate flange components
2Reliability
If multiple retaining rings and bushings are used, then the reliability of load transmission is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The invention removes the retaining rings and central flange from the assembly, simplifying manufacturing. Load transmission reliability is maintained through direct press-fit contact between the shaft end faces and the retainers, eliminating multiple intermediate components that require precise alignment and assembly
Solution Approach 2:
Instead of using retaining rings to secure bushings to a flanged shaft, the invention inverts the approach by having the retainers directly press-fit onto the shaft end faces, with the shaft itself providing the load-bearing surface. This reverses the traditional hierarchy and simplifies the assembly structure
Data Source
AI summary
A track roller includes a roller shell, a first retainer, a second retainer, a first holding ring, and a second holding ring. The first retainer is press-fitted to the outer periphery of a shaft and abuts on a first end face of the roller shell. The second retainer is press-fitted to the outer periphery of the shaft and abuts on a second end face of the roller shell. The first holding ring is attached to the outer periphery of the shaft on the outside of the first retainer and fixes the first retainer. The second holding ring is attached to the outer periphery of the shaft and fixes the second retainer.