Axle Assembly Clutch Collar Actuator Nesting
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Solution Overview
Problem
Current differential locking systems in axle assemblies face challenges in efficiently controlling the rotation of output shafts and engaging/disengaging the clutch collar, particularly in compact designs that require space optimization and reliable actuation mechanisms.
Innovation Solution
The axle assembly incorporates a differential unit, a clutch collar, a bearing, a differential carrier, a bearing cap with an anti-rotation feature, and a clutch collar actuator mechanism, which includes an actuator and a fork to operatively connect the actuator to the clutch collar, allowing for controlled engagement and disengagement of the clutch collar, thereby facilitating differential locking and reducing package space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a compact differential locking system is designed to reduce package space, then space efficiency is improved, but the complexity of controlling clutch collar engagement and disengagement increases
Solution Approach 1:
The actuator is positioned within the chamber formed by the bearing cap, nesting the actuator mechanism inside the existing differential assembly structure. This eliminates the need for external actuator mounting space and reduces overall package volume while maintaining the functional complexity of the actuation mechanism
Solution Approach 2:
The bearing cap serves multiple functions: it supports the bearing that rotatably supports the differential unit, and simultaneously provides the chamber that houses the actuator. This multi-functionality reduces the number of separate components needed, simplifying the overall structure while maintaining compact dimensions
2Volume of moving object
If the bearing cap includes a chamber to receive the actuator, then space efficiency is improved, but the structural complexity of the bearing cap increases
Solution Approach 1:
The bearing cap is designed with an integrated chamber that simultaneously serves as both a structural support element for the bearing and a housing for the actuator. This eliminates the need for separate actuator housing components, reducing overall part count and assembly complexity despite the increased geometric complexity of the cap itself
Solution Approach 2:
The chamber for receiving the actuator is merged into the bearing cap structure itself, combining two previously separate functions (bearing support and actuator housing) into a single integrated component. This reduces the number of parts and simplifies assembly while maintaining compact packaging
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
This configuration enables efficient torque distribution between output shafts, allows for differential locking and unlocking, and improves clearance within the axle assembly, enhancing operational reliability and space efficiency.
Implementation Method 1
The bearing may rotatably support the differential unit
Implementation Method 2
The anti-rotation feature may extend away from the first portion. The fork may have a fork opening that may receive the anti-rotation feature and the anti-rotation feature may limit rotation of the fork about the actuator axis
Data Source
AI summary
An axle assembly having a bearing cap, an actuator, and a fork. The bearing cap may be disposed in a cavity defined by an axle housing and a differential carrier and may be fixedly disposed on the differential carrier. The fork may be disposed in the cavity and may couple the actuator to a clutch collar.