Clutch Collar Axial Movement for Torque Disconnection
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Solution Overview
Problem
Current drive axle assemblies lack efficient mechanisms for dynamically disconnecting torque transfer to wheels, leading to energy consumption and wear issues, particularly in vehicles with varying terrain and load conditions.
Innovation Solution
The drive axle assembly incorporates a clutch collar mechanism that moves between axial positions to selectively engage or disengage the drive pinion with the side gear and pinion collar, allowing for torque transfer control and synchronization of angular velocities, thereby disconnecting torque to the wheels when needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drive pinion continuously engages with the side gear to transfer torque to the wheels, then the vehicle maintains continuous drive capability, but energy consumption increases and component wear accelerates
Solution Approach 1:
The clutch collar is made movable along the drive pinion axis, allowing the engagement state to dynamically change between engaged and disengaged positions. This enables the system to adapt between continuous drive and torque disconnection modes, resolving the contradiction between maintaining drive capability and reducing energy consumption during coasting or neutral conditions
2Loss of energy
If the clutch collar moves axially to disconnect torque transfer, then energy consumption is reduced, but the complexity of the engagement mechanism increases
Solution Approach 1:
The clutch collar serves as an intermediary component between the drive pinion and the side gear/pinion collar. By positioning the clutch collar's outer surface between these components, it acts as a mediator that can selectively block or transmit torque through axial movement, achieving torque disconnection with a relatively simple mechanical structure rather than complex control systems
Solution Approach 2:
The clutch collar's axial movement automatically engages or disengages the torque path without requiring additional control mechanisms. When the clutch collar moves axially, it self-regulates the engagement state based on the relative positions of the drive pinion and side gear, simplifying the overall control system while maintaining effective torque management
Data Source
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AI summary
An axle assembly that may include a housing assembly, a case, an interaxle differential unit, drive pinion, and an output shaft. The axle assembly may further include a clutch collar that is moveable between a first position and a second position to engage and disengage a rotatably drivable member and the drive pinion.