ATV Torsion Bar Coupling Layout for Low Center of Gravity
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Solution Overview
Problem
Vehicles designed for uneven terrain face challenges in maintaining low center of gravity and protecting torsion bar couplings from flying objects, which affect riding comfort and safety.
Innovation Solution
A vehicle design featuring a torsion bar with a central portion extending transversely, positioned below the drive shafts, and couplings attached to the lower arms in a way that keeps the center of gravity low and shields them from frontal impacts, using a configuration that allows for compact and efficient placement of the torsion bar components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the torsion bar is attached to the upper arm, then the roll angle is reduced and riding comfort is improved, but the center of gravity of the vehicle becomes high
Solution Approach 1:
Instead of attaching the torsion bar to the upper arm as in conventional designs, this patent inverts the approach by attaching it to the lower arm. This reversal of the attachment location reduces the center of gravity while still achieving roll angle reduction and improving riding comfort.
2Device complexity
If the torsion bar couplings are attached to the front portion of the lower arm, then the structure is simplified, but the couplings may be hit by flying objects from the front
Solution Approach 1:
The patent changes the longitudinal position dimension of the coupling attachment point on the lower arm. By attaching the couplings to the rear portion rather than the front portion, it extends the protective coverage area backward, preventing flying objects from impacting the couplings while maintaining structural simplicity.
3Ease of manufacture
If the dimension of the vehicle body coupling along the vehicle longitudinal direction is greater than the front wheel coupling dimension, then the arm structure is optimized, but the torsion bar couplings become more vulnerable to flying objects
Solution Approach 1:
The patent extends the longitudinal dimension of the lower arm's vehicle body coupling portion beyond the front wheel coupling portion. This dimensional extension creates a rearward-extended protective zone that shields the torsion bar couplings attached to the rear portion from flying objects, while maintaining the optimized arm structure with greater vehicle body coupling dimension.
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 design enhances riding comfort by maintaining a low center of gravity and prevents torsion bar couplings from being hit by flying objects, while providing increased freedom in vehicle layout and compact arrangement of the torsion bar.
Implementation Method 1
a torsion bar may be provided between the left front wheel and the right front wheel in order to reduce the roll angle. In a vehicle provided with the torsion bar, the torsion bar is twisted when the vehicle turns to the left and thus the right front wheel changes its position upward.
Data Source
AI summary
A vehicle includes a torsion bar including a central portion, a left coupling, and a right coupling. The central portion extends in a lateral direction in front of a left drive shaft and a right drive shaft. The left coupling is positioned to the left of the central portion and coupled to a portion of a left lower arm that is rearward relative to the left drive shaft. The right coupling is positioned to the right of the central portion and coupled to a portion of a right lower arm that is rearward relative to the right drive shaft.