Vehicle Wheel Orientation Driving Device with Cam Unit
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Solution Overview
Problem
Conventional vehicle wheel orientation adjustment devices increase unsprung mass and have unsatisfactory robustness due to the combination of motors, screw rods, sleeves, and link rods forming a multi-section suspension arm.
Innovation Solution
A driving device with a lifting shaft, suspension arm, and cam unit, where the suspension arm moves transversely due to interaction between rollers and inclined cam faces, reducing unsprung mass and enhancing robustness by separating the driving unit from the suspension arm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the motor, screw rods, sleeves, and link rods are combined to form a suspension arm, then the wheel orientation can be adjusted, but the unsprung mass is increased
Solution Approach 1:
The invention divides the suspension system into separate components: the driving device (motor, screw rods, cam units) is separated from the suspension arm. The suspension arm becomes an independent component that only needs to support the wheel, while the driving device is mounted separately on the vehicle body. This segmentation reduces the unsprung mass by removing the driving components from the suspended mass.
Solution Approach 2:
The driving components (motor, screw rods, link rods) are extracted from the suspension arm structure. The suspension arm is now a simple support component without integrated driving mechanisms, thereby reducing the unsprung mass while maintaining the wheel orientation adjustment function through the separate driving device.
2Ease of operation
If screw rods, link rods, and sleeves are combined to form a multi-section suspension arm, then the wheel orientation can be adjusted, but the robustness of the suspension arm is not satisfactory
Solution Approach 1:
The invention separates the suspension arm from the multi-section link rod structure. The suspension arm becomes a single, robust component that provides structural support, while the orientation adjustment function is achieved through the cam unit and lifting shaft mechanism. This eliminates the weakness of having multiple connected sections in the suspension arm itself.
Solution Approach 2:
The adjustable link rod mechanism is extracted from the suspension arm structure. The suspension arm is now a simple, robust support component, while the wheel orientation adjustment is achieved through the separate driving device with cam units that interact with the suspension arm's positioning holes.
3Ease of operation
If screw rods are connected threadedly to sleeves, then the link rod mechanism can function, but the robustness of the suspension arm is compromised
Solution Approach 1:
The threaded connection mechanism between screw rods and sleeves is extracted from the suspension arm structure. The suspension arm no longer contains these weak threaded joints, instead using a simpler structure with positioning holes that interact with cam units, thereby improving robustness while maintaining the ability to adjust wheel orientation.
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 solution reduces unsprung mass and improves robustness by allowing the suspension arm to move universally while maintaining a simple structure, thus enhancing the vehicle's performance.
Implementation Method 1
a cam unit including at least one roller connected to one of the lifting shaft and the suspension arm, and an inclined cam face provided on the other one of the lifting shaft and the suspension arm. The roller and the inclined cam face interact with each other such that the suspension arm moves along the transverse direction.
Data Source
AI summary
A driving device for adjusting an orientation of a wheel attached to a vehicle body includes: a driving unit; a lifting shaft extending along a first axis and capable of moving axially when driven by the driving unit; a suspension arm extending along a transverse direction intersecting the first axis, and having one end adapted for connection with the wheel and another end disposed in proximity to the lifting shaft; and a cam unit including at least one roller connected to one of the lifting shaft and the suspension arm, and an inclined cam face provided on the other one of the lifting shaft and the suspension arm. The roller and the inclined cam face interact with each other such that the suspension arm moves along the transverse direction.