Magnetic Differential Locking Mechanism With Self-Cleaning Contact Surfaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle differential systems face challenges in uniformly transmitting torque between wheels with different traction conditions, leading to undesired vehicle performance when one wheel experiences a surface with a lower coefficient of friction than the other.
Innovation Solution
A magnetically responsive locking mechanism for a vehicle differential, comprising a magnetic field generator, a drive member, and a lock member, where the drive member is movable between positions to engage or disengage with the lock member to selectively lock or unlock the differential, utilizing a magnetic field to drive the lock member into or out of engagement with the gear, and featuring discontinuous contact surfaces with voids to reduce contamination and improve engagement reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism is provided to lock the differential and prevent different wheel spin rates, then torque transmission uniformity is improved, but device complexity increases
Solution Approach 1:
The patent replaces traditional mechanically actuated locking mechanisms with an electromagnetic actuation system. The electromagnetic actuator uses magnetic fields to move the locking elements, eliminating the need for complex mechanical linkages, springs, and levers that would otherwise be required to achieve the same locking function.
Solution Approach 2:
The differential locking mechanism is integrated into the existing differential assembly, allowing the same component structure to serve both as a differential gear system and a locked differential system. The locking elements are incorporated within the gear teeth structure, enabling the system to function as either open or locked differential based on actuation state.
2Reliability
If contact surfaces are made continuous to ensure engagement, then engagement reliability is improved, but contamination accumulation increases
Solution Approach 1:
The contact surfaces of the locking elements are designed with a porous structure containing multiple voids. This porous design allows the surface to maintain engagement contact while providing pathways for contaminants to escape rather than accumulate, effectively combining engagement reliability with contamination resistance.
Solution Approach 2:
The contact surfaces are segmented into multiple discrete contact regions separated by voids, rather than being continuous. This segmentation maintains sufficient contact area for reliable engagement while creating gaps that prevent contaminant buildup and allow for self-cleaning through lubricant flow.
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 mechanism ensures uniform torque transmission between wheels by locking the differential under specific conditions, enhancing vehicle performance by maintaining synchronized wheel rotation and reducing contamination-related issues through the use of voids in the contact surfaces.
Implementation Method 1
A magnetically responsive locking mechanism for a vehicle differential, comprising a magnetic field generator, a drive member, and a lock member, where the drive member is movable between positions to engage or disengage with the lock member to selectively lock or unlock the differential, utilizing a magnetic field to drive the lock member into or out of engagement with the gear
Data Source
Figure 1
Figure 2
Figure 3~7
AI summary
A system for a vehicle differential includes a magnetic field generator, a drive member and a lock member. The drive member is movable in response to a magnetic field between a first position and a second position, and the drive member has at least one contact surface. The lock member adjacent to the drive member and having at least one contact surface that is engaged by at least one contact surface of the drive member so that the lock member is driven by the drive member to engage a gear of the differential when the drive member is in the second position, and the lock member is adapted to be disengaged from the gear when the drive member is in the first position. One or both of the drive member and the lock member has at least one contact surface that is discontinuous.