Straddled Vehicle Drive Unit Layout for Compact Power Packaging
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Solution Overview
Problem
Straddled vehicles face challenges in accommodating large rotational power components due to their compact design, requiring a versatile and compact vehicle body compatible with various rotational power systems.
Innovation Solution
A compact straddled vehicle design featuring a frame structure that supports a drive unit with a drive motor, control unit, and gear box, allowing for both hybrid and electric vehicle configurations by strategically arranging these components to optimize space and compatibility with different power systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If rotational power components are arranged near the center of the vehicle body, then the vehicle structure is simplified and components are easily accessible, but the vehicle body becomes too large to accommodate compact design requirements
Solution Approach 1:
The patent relocates the drive motor from the central longitudinal position to the lateral direction, specifically positioning it near the front wheel along the left-right axis. This dimensional shift allows the motor to be arranged in the width dimension rather than the length dimension, reducing the vehicle's longitudinal volume while maintaining component accessibility and structural simplicity.
2Volume of moving object
If the vehicle body is designed to be compact, then space efficiency is improved, but there is insufficient space to accommodate large rotational power components
Solution Approach 1:
The patent designs a universal mounting structure on the vehicle frame that can accommodate different types of rotational power components (electric motors, hybrid power units, etc.). The mounting structure includes standardized interfaces and adjustable positioning mechanisms, allowing the same compact vehicle body to support various power system configurations without requiring redesign, thus achieving both compactness and versatility.
Solution Approach 2:
The patent separates the rotational power components into modular units that can be independently mounted on the frame. The drive motor, power source, and control components are designed as discrete modules with standardized mounting interfaces, allowing flexible arrangement within the compact vehicle body and easy adaptation to different power system requirements.
3Power
If rotational power components are made large to ensure sufficient power output, then power capability is improved, but the compact vehicle body cannot accommodate them
Solution Approach 1:
The patent selects rotational power components with optimized parameters that deliver sufficient power output in a compact form factor. By carefully selecting motors with high power density and efficient power transmission ratios, the system achieves required power levels without increasing component volume, allowing adequate power output within the constraints of the compact vehicle body.
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 enables a compact and strong vehicle body that is versatile and compatible with various rotational power systems, enhancing the vehicle's agility and operational flexibility.
Implementation Method 1
a drive unit including a drive motor, a control unit, and a gear box, the drive motor being configured to receive electric power supplied from the power source unit, and drive the driving wheel
Data Source
AI summary
A straddled vehicle, including a frame structure, a rear arm, a driving wheel rotatably supported by the rear arm, a power source unit, and a drive unit including a gear box, a drive motor and a control unit. The drive motor is arranged with an off-set toward a first direction from a center of the straddled vehicle, without overlapping the power source unit in a side view. The control unit is further in a second direction than the drive motor, and overlaps the drive motor, but does not overlap the power source unit, in the side view. The gear box is further in the second direction than the drive motor, and overlaps the drive motor in the side view. The gear box is also further in the first direction than the control unit, and overlaps with the control unit, but does not overlap the power source unit, in the side view.