Front Axle Assembly with Adjustable Inner-C-Forgings
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Solution Overview
Problem
Current integral front axle assemblies in off-road vehicles cannot independently adjust caster angles and pinion to driveshaft angles, leading to vehicle handling issues and safety hazards, particularly when the chassis is lifted, causing vibrations, steering problems, and instability.
Innovation Solution
A front axle assembly design that allows for independent adjustment of caster angles and pinion to driveshaft angles using detachable inner-C-forgings with varying mounting positions and connection structures, ensuring support strength and maintaining the original mounting points and angles of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the chassis is lifted to increase ground clearance, then the vehicle's off-road capability is improved, but the pinion to driveshaft angle increases causing u-joint vibration and driveshaft damage
Solution Approach 1:
The patent makes the inner-C-forging detachable and adjustable, allowing the caster angle to be dynamically changed based on suspension height. This enables the system to adapt to different chassis positions, maintaining proper pinion to driveshaft angles regardless of whether the vehicle is in stock configuration or lifted, thereby preventing u-joint vibration and driveshaft damage while preserving off-road capability
Solution Approach 2:
The patent changes the caster angle parameter by providing inner-C-forgings with different mounting positions corresponding to different caster angles. This allows adjustment of the pinion to driveshaft angle to compensate for changes in suspension height, resolving the conflict between off-road capability and driveshaft reliability
2Strength
If the chassis is lifted, then ground clearance is improved, but the caster angles become smaller causing front wheel vibration and steering instability
Solution Approach 1:
The patent enables dynamic adjustment of caster angles by making the inner-C-forging detachable with multiple mounting positions. This allows the caster angle to be optimized for different suspension heights, maintaining steering stability in both stock and lifted configurations while preserving improved ground clearance
Solution Approach 2:
The patent provides different caster angle parameters through inner-C-forgings with varying mounting positions. By selecting appropriate mounting positions, the caster angle can be adjusted to compensate for chassis lift, preventing front wheel vibration and steering instability while maintaining ground clearance benefits
3Ease of manufacture
If the inner-C-forgings are welded to the axle tube as factory setting, then manufacturing simplicity is improved, but the caster angle cannot be independently adjusted
Solution Approach 1:
The patent segments the inner-C-forging from the axle tube by providing detachable connection structures instead of permanent welding. This allows the inner-C-forging to be separated into an independent adjustable component while maintaining manufacturing simplicity through standardized connection interfaces
Solution Approach 2:
The patent transforms the static welded connection into a dynamic detachable connection that allows adjustment of caster angles. The inner-C-forging can be removed and repositioned at different mounting locations, providing adaptability while maintaining ease of manufacture through reusable connection structures
4Manufacturing precision
If the wheelbase is adjusted to alleviate vehicle deviation, then directional accuracy is temporarily improved, but the vehicle produces distortion feeling and chassis instability
Solution Approach 1:
The patent changes the caster angle parameter instead of the wheelbase to improve directional accuracy. By adjusting the caster angle through different inner-C-forging mounting positions, the patent achieves proper vehicle alignment without distorting the wheelbase geometry, thereby maintaining chassis stability and eliminating distortion feelings
Data Source
AI summary
The present disclosure provides an integral front axle assembly which includes an axle housing configured for connecting with a driveshaft; two axle tubes respectively connected with two opposite sides of the axle housing; two inner-C-forgings disposed at ends of the axle tubes and each being configured for connecting with a kingpin knuckle; and at least one connection structure, for detachably fixing at least one of the inner-C-forgings to a corresponding axle tube. The inner-C-forging has different mounting positions on the axle tube, correspondingly, the caster to pinion angle is different at inner-C-forging's different mounting positions. The caster angles on both sides and the pinion to driveshaft angle can be conveniently and independently adjusted while ensuring the support strength.