Three-Wheeled Scooter Bevel-Gear Coupling for Synchronized Rear Wheels
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Solution Overview
Problem
Traditional three-wheeled scooters fail to maintain contact with the ground during cornering or uneven terrain, leading to instability and potential overturning due to individual wheel movement and unstable center of gravity.
Innovation Solution
A coupling mechanism with a linkage module comprising two linkage gear sets and two driven gear sets, where the first bevel gears rotate in opposite directions, linking the rear wheels to ensure they maintain contact with the ground by synchronizing their movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two rear wheels use independent lifting and suspension systems, then each wheel can individually adapt to road surface variations, but the vehicle fails to maintain ground contact during cornering or on uneven roads, leading to instability and potential overturning
Solution Approach 1:
The patent merges the independent suspension systems of two rear wheels into a coupled system through a linkage mechanism. The linkage module connects the swing arms of both wheels, forcing them to move in coordinated fashion rather than independently. This combining of previously independent systems resolves the contradiction by maintaining individual adaptability while adding collective stability through coupled motion.
Solution Approach 2:
The patent implements a dynamic coupling mechanism that allows the rear wheels to move together as a coordinated unit while still responding to road conditions. The linkage module enables the system to adapt dynamically to varying road surfaces and cornering forces, transforming the static independent suspension into a dynamic coupled system that maintains both adaptability and stability.
2Ease of operation
If the two rear wheels move independently up and down, then each wheel responds individually to road conditions, but this results in situations where a single wheel loses ground contact, causing unstable center of gravity
Solution Approach 1:
The linkage mechanism creates a feedback system where the motion of one wheel is transmitted to the other through the coupling module. When one wheel encounters uneven terrain and moves upward, the linkage transmits this motion to the other wheel, ensuring coordinated response. This feedback mechanism ensures that both wheels maintain ground contact by sharing and balancing their individual terrain responses.
Solution Approach 2:
The patent segments the suspension system into modular components (swing arms, linkage modules, coupling mechanisms) that can independently respond to terrain while maintaining coordinated motion. This segmentation allows each wheel assembly to handle local terrain variations while the coupling ensures overall system reliability and ground contact maintenance.
3Device complexity
If traditional independent suspension is used, then the structure is simpler, but the vehicle experiences overturning accidents due to single wheel lift-off and unstable center of gravity
Solution Approach 1:
The patent combines two independent suspension systems into one coupled system through the linkage module. This merging increases structural complexity but resolves the stability issue by ensuring both rear wheels move together and maintain ground contact during cornering and on uneven roads, preventing overturning accidents.
Solution Approach 2:
The coupling mechanism performs preliminary coordination of wheel motion before the vehicle encounters critical stability situations. By pre-linking the swing arms through the linkage module, the system proactively ensures coordinated wheel behavior during cornering and terrain variations, preventing the unstable center of gravity condition before it can cause overturning.
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
Enhances vehicle stability and riding comfort by ensuring both rear wheels remain grounded, reducing the risk of overturning and minimizing bouncing on uneven surfaces.
Implementation Method 1
each linkage gear set has a first shaft rod connected with a first bevel gear, and each driven gear set has a second shaft rod connected with a second bevel gear, the two first bevel gears and the two second bevel gears are all located in the housing, each of the first bevel gears simultaneously meshes the two second bevel gears
Data Source
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AI summary
A coupling mechanism includes a base(1), an end used to pivot to a rear end of a frame(F), a housing(2), combined and fixed in the base(1), and a linkage module(3), having two linkage gear sets(31) and two driven gear sets(32). Each linkage gear set(31) has a first shaft rod(311) connected with a first bevel gear(312), and each driven gear set(32) has a second shaft rod(321) connected with a second bevel gear(322). The two first bevel gears(312) and the two second bevel gears(322) are all located in the housing(2). Each of the first bevel gears(312) simultaneously meshes the two second bevel gears(322), so that the two first bevel gears(312) rotate in opposite directions. The two first shaft rods(311) respectively penetrate out of the base(1) toward two sides, and connect with one swing arm(33), and the two second shaft rods(321) are respectively combined with the housing(2)..