Vertical Motor Mounting for RC Vehicle Torque Twist Reduction
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Solution Overview
Problem
Traditional RC model vehicle designs face challenges in packaging and weight distribution due to scale realism and space constraints, leading to issues with torque twist and axle movement.
Innovation Solution
A radio-controlled model vehicle with a vertically oriented motor non-rotatively coupled to the chassis, a rear axle pivotally coupled in a vertical direction via linkages, and an extendable driveshaft transmitting motor torque to the rear axle differential, thereby powering propulsion wheels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a traditional horizontally oriented motor is used in RC model vehicles, then the motor can be easily coupled to the driveshaft, but the vehicle experiences increased torque twist and counter moment reactions that affect handling and weight distribution
Solution Approach 1:
The patent inverts the traditional horizontal motor orientation to a vertical orientation. The motor is mounted vertically on the chassis with its output shaft extending downward to engage the driveshaft, rather than the conventional horizontal mounting. This inversion eliminates torque twist and counter moment reactions by aligning the motor's rotational axis perpendicular to the chassis plane, thereby improving vehicle handling and weight distribution while maintaining easy coupling through the vertical driveshaft engagement
2Shape
If scale realism and packaging constraints are prioritized in RC model vehicles, then the vehicle achieves increased realism, but space constraints limit the available room for electronics and batteries
Solution Approach 1:
The patent transitions from traditional horizontal component layout to a vertical arrangement, utilizing the vertical dimension for motor mounting and driveshaft orientation. This dimensional change allows electronics and batteries to be positioned in horizontal spaces within the chassis, optimizing packaging efficiency while maintaining scale realism. The vertical motor and driveshaft configuration creates unused horizontal volume that can accommodate additional electronic components and battery capacity
3Stability of the object's composition
If the motor is vertically oriented and non-rotatively coupled to the chassis, then torque twist is reduced, but the coupling mechanism becomes more complex
Solution Approach 1:
The patent extracts the rotational coupling function from the motor-chassis connection by using a non-rotative mounting where the motor body remains fixed to the chassis while only the driveshaft rotates. The motor is rigidly mounted to the chassis frame with its output shaft extending downward to engage the driveshaft, separating the motor's structural support function from its rotational power transmission function. This simplifies the coupling mechanism by eliminating the need for complex rotational motor mountings while maintaining torque twist reduction
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 vertical motor mounting reduces torque twist and counter moment reactions, allowing for improved weight distribution and handling while maintaining scale realism and optimizing electronic packaging.
Implementation Method 1
a first and second constant velocity joint located at each end of the driveshaft
Implementation Method 2
an extendable driveshaft vertically oriented and rotatively coupling the motor to the rear axle differential and configured to transmit a motor torque from the motor to the rear axle differential
Implementation Method 3
a rear axle pivotally coupled to model vehicle chassis in a vertical direction via one or more rear axle linkages
Implementation Method 4
a vertically oriented motor non-rotatively coupled to the model vehicle chassis
Data Source
AI summary
A radio-controlled model vehicle is provided including a model vehicle chassis, a vertically mounted motor, and a rear axle, configured to pivot in a vertical direction relative to the model vehicle chassis via one or more rear axle linkages. The rear axle also includes a vertical rear axle differential. The model vehicle further includes a gear reduction transmission including a spur gear comprising spur gear teeth offset from a spur gear center portion, and a pinion gear engaged with the spur gear teeth. In addition, the model vehicle includes a vertical, extendable driveshaft that has one end attached to the spur gear center portion and another end attached to the rear axle differential. Wherein the driveshaft extends through the spur gear and the motor powers propulsion wheels coupled to the rear axle via the gear reduction transmission, driveshaft and rear axle differential.