Differential Assembly Single Leaf Spring Gear Adjustment
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Solution Overview
Problem
Existing differential assemblies for motor vehicles have a high number of components, require lengthy spacer selection and mounting, and cannot automatically adjust for clearance due to machining or wear, leading to suboptimal gear meshing and increased assembly complexity.
Innovation Solution
A differential assembly with a single C-shaped leaf spring adjustment mechanism that automatically compensates for clearance between satellite and planetary gears, using a spring coupled to both satellite gears to maintain optimal meshing and simplify assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple spacer members are used to adjust gear positions, then manufacturing precision can be achieved, but device complexity and assembly time increase
Solution Approach 1:
The patent combines multiple adjustment functions into a single spacer member that simultaneously adjusts the positions of both satellite gears relative to the planetary gears, eliminating the need for multiple separate spacer components and reducing assembly complexity
Solution Approach 2:
The single spacer member performs multiple functions: it maintains the correct radial position of satellite gears, compensates for manufacturing tolerances, and ensures proper meshing clearance, thereby replacing what would traditionally require multiple specialized components
2Manufacturing precision
If manual adjustment of spacer members is performed, then gear position can be set, but assembly time increases
Solution Approach 1:
The spacer member is pre-designed with specific thickness values that correspond to different tolerance ranges, allowing workers to select the appropriate spacer without complex measurements or adjustments during assembly, thereby reducing assembly time while maintaining precision
3Manufacturing precision
If fixed spacer members are used, then initial gear meshing can be achieved, but automatic compensation for wear is not possible
Solution Approach 1:
The patent introduces an elastic element that allows the spacer member to dynamically adjust its position, enabling automatic compensation for wear and clearance that develops during operation, while maintaining the precision established during initial assembly
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 reduces assembly time and complexity, ensures constant optimal gear meshing, and automatically adjusts for wear, providing a cost-effective and efficient solution for maintaining gear alignment.
Implementation Method 1
adjustment means of the position of the satellite gears comprise a single spring coupled to both the satellite gears
Data Source
AI summary
A differential assembly, in particular for motor vehicles, transmits the motion from an input shaft to a pair of reciprocally counterposed coaxial output shafts and is provided with a ring gear rotably fed in use by the input shaft about a rotation shaft; the assembly being further provided with a gear set transmitting the motion from the ring gear to the output shafts and having a satellite gear carrier pin, whose axis is orthogonal to the axis of rotation of the ring gear; a single leaf spring is abuttingly coupled to two satellite gears to automatically adjust the position of the satellite gears themselves.