Helical Differential Assembly with Adjustable Preload Mechanism
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Solution Overview
Problem
Limited slip differential assemblies lack adjustable frictional engagement, which can result in inconsistent torque distribution between driven wheels, affecting vehicle performance and traction.
Innovation Solution
A vehicle differential assembly with a coupling mechanism and a biasing member that allows for adjustable preload force, enabling variable frictional engagement between the side gears and the differential housing, thereby optimizing torque distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring applies a predetermined engagement force to provide frictional engagement between the side gear and differential housing, then limited slip differential function is achieved, but the engagement force is not adjustable leading to inconsistent torque distribution
Solution Approach 1:
The patent transforms the static spring engagement force into a dynamically adjustable system. The adjustment member (threaded shaft) allows the engagement force to be modified by rotating it, which moves the adjustment member axially to compress or extend the spring. This enables the frictional engagement force to be adapted to different operating conditions, resolving the contradiction between reliable torque distribution and adaptability.
Solution Approach 2:
The patent changes the physical parameter of engagement force from fixed to variable. By introducing the adjustment member that can be rotated to change the spring compression, the engagement force parameter becomes可调 (adjustable). This allows optimization of torque distribution consistency under varying vehicle operating conditions, addressing both reliability and adaptability requirements.
2Reliability
If a fixed spring engagement force is used in the limited slip differential, then the structure is simple, but the torque distribution between driven wheels becomes inconsistent affecting vehicle performance
Solution Approach 1:
The patent segments the coupling assembly into distinct functional components: the spring member for providing engagement force, the adjustment member for modifying the force, and the connection member for integrating these elements. This segmentation allows each component to perform its specific function while working together to achieve adjustable engagement force, improving vehicle performance without excessive complexity.
Solution Approach 2:
The adjustment member acts as an intermediary between the spring member and the housing. By rotating this intermediary component, the user can control the spring compression and thus the engagement force. This intermediary mechanism provides a simple way to add adjustability without significantly increasing overall device complexity.
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 adjustable preload mechanism enhances torque distribution consistency, improving vehicle traction and performance by allowing for customizable frictional engagement settings.
Implementation Method 1
The biasing member may be engaged with the coupling mechanism and may urge the first output assembly into frictional engagement with the differential housing
Data Source
AI summary
A vehicle differential assembly includes a differential housing rotatable about an axis. A first output assembly includes a first side gear positioned within the differential housing and a first output member coupled to the first side gear and having an aperture aligned with the axis. A second output assembly includes a second side gear positioned within the differential housing and a second output member coupled for rotation with the second side gear. A first helical pinion gear is meshingly engaged with the first side gear. A second helical pinion gear is meshingly engaged with the second side gear and the first helical pinion gear. A first coupling assembly includes a coupling mechanism disposed in the aperture and a biasing member engaged with the coupling mechanism to bias the first output assembly into frictional engagement with the differential housing.