Adjustable Motorcycle Case Gear Mechanism for Aerodynamic Storage
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Solution Overview
Problem
Existing motorcycle cases with gearwheel mechanisms lack an aerodynamic design while maximizing storage volume, and their components are not suitable for both side and rear case applications.
Innovation Solution
A motorcycle case with an inner and outer case part connected by a gearwheel mechanism, featuring synchronized gearwheel groups with spur and bevel gears, allowing adjustable storage volume and aerodynamic design, and a manually operable control element for simple adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a gearwheel mechanism with parallel wall design is used, then the storage volume can be adjusted, but the aerodynamic design is compromised due to flat wall configuration
Solution Approach 1:
The case part is designed with a movable wall that can dynamically change its configuration between flat and convex positions. The gearwheel mechanism enables this dynamic transformation, allowing the wall to adopt a convex shape for aerodynamic efficiency during operation while maintaining maximum storage volume when stationary or at low speeds.
Solution Approach 2:
The geometric parameters of the case wall are made variable through the gearwheel mechanism. By changing the position and curvature parameters of the wall, the design achieves both aerodynamic optimization (convex shape) and maximum storage capacity (flat position), resolving the contradiction between fixed shape requirements and variable functional needs.
2Volume of moving object
If a gearwheel mechanism is used to adjust storage volume, then the width can be adapted, but the overall width cannot be reduced for better maneuverability and parking
Solution Approach 1:
The case width is designed as a dynamic parameter that can be adjusted on-demand. The gearwheel mechanism enables the outer case part to move laterally, reducing the overall width when maximum storage is not required, thereby improving maneuverability and parking capability while maintaining full storage capacity when needed.
Solution Approach 2:
The case is divided into movable and fixed segments connected by the gearwheel mechanism. This segmentation allows independent movement of the outer case part, enabling width reduction without compromising the internal storage structure, thus resolving the contradiction between adjustable volume and compact dimensions.
3Volume of moving object
If the outer case part is displaced laterally to adjust storage volume, then the storage capacity changes, but the air resistance increases with larger air impingement surface
Solution Approach 1:
The air impingement surface area is made dynamically adjustable through lateral displacement of the outer case part. When high storage volume is required, the case expands and accepts increased air resistance. When storage is reduced, the case contracts to minimize air impingement surface, thereby reducing air resistance and improving fuel consumption.
Solution Approach 2:
The geometric parameters of the case, including surface area and volume, are made variable through the gearwheel mechanism. By changing these parameters according to storage needs, the design optimizes the balance between storage capacity and aerodynamic performance, reducing air resistance when full storage is not required.
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 provides an aerodynamic design with maximized storage volume, symmetrical force application, and compatibility for both side and rear case configurations, enhancing maneuverability and reducing air resistance.
Implementation Method 1
a gearwheel mechanism coupling the case parts. This gearwheel mechanism can adjust the width and thus the storage volume of the motorcycle case by displacing the outer case part relative to the inner case part
Implementation Method 2
the gearwheel groups each have at least one spur gear and at least one bevel gear and either the spur gears or the bevel gears of adjacent gearwheel groups mesh
Implementation Method 3
the gearwheel groups each have at least one spur gear and at least one bevel gear and either the spur gears or the bevel gears of adjacent gearwheel groups mesh
Data Source
AI summary
A motorcycle case includes an inner case part which is fastenable to a motorcycle and an outer case part connected to the inner case part that is displaceable laterally relative to the inner case part. A driven gearwheel mechanism couples the inner case part and the outer case part where a width of the motorcycle case is adjustable by displacing the outer case part relative to the inner case part. The gearwheel mechanism includes at least a first gearwheel group and a second gearwheel group which each have a plurality of gears coupled to one another, rotating together and assigned to an axis of rotation, where respective teeth of adjacent gearwheel groups mesh. The first gearwheel group and the second gearwheel group each have at least one spur gear and at least one bevel gear and either the spur gears or the bevel gears of adjacent gearwheel groups mesh.