Ratcheting Gear Wheel Deployment Mechanism
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Solution Overview
Problem
Existing load-supporting bases with retractable wheels are inconvenient due to difficult screw rotation under heavy loads, making it challenging to easily move between deployed and retracted configurations.
Innovation Solution
A base assembly comprising a load-supporting frame, a circular ratcheting gear, ratcheting pawls, an elongated member, and a linkage, which allows for easy rotation of the ratcheting gear in one direction, enabling wheels to be moved between deployed and undeployed positions with reduced effort, using a ratcheting relationship and cyclic driving assembly to facilitate smooth transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a screw mechanism is used to lift and lower the wheel, then the wheel can be moved between deployed and retracted positions, but the rotation of the screw becomes difficult when the apparatus bears a heavy load
Solution Approach 1:
The patent replaces the screw mechanism with a ratcheting gear system. The gear allows rotation in one direction (deploying the wheel) while preventing reverse rotation (retracting the wheel), eliminating the difficulty of rotating a screw under heavy load. The ratcheting mechanism provides mechanical advantage through gear teeth engagement, making wheel deployment effortless even with heavy loads.
Solution Approach 2:
The system transitions from a static screw mechanism to a dynamic ratcheting gear system that allows unidirectional rotation. The gear can rotate freely in the deployment direction while being locked in the retraction direction, providing adaptive mechanical behavior that reduces effort during wheel deployment while maintaining stability when retracted.
2Stability of the object's composition
If the wheel is retracted to provide stability, then the apparatus becomes stable, but the apparatus loses portability
Solution Approach 1:
The ratcheting gear system enables dynamic transition between stable (retracted) and portable (deployed) states. The gear allows easy deployment of the wheel for portability while automatically locking to maintain stability when retracted, providing adaptability between the two operational states without compromise.
Solution Approach 2:
The wheel assembly serves multiple functions: it provides stability when retracted and portability when deployed. The ratcheting mechanism enables the same structural component to fulfill both contradictory requirements by allowing easy transition between configurations, making the apparatus universally adaptable to different operational needs.
3Ease of operation
If a ratcheting gear system is used to enable easy wheel deployment, then the effort required to move the wheel is reduced, but the device complexity increases
Solution Approach 1:
The wheel assembly is segmented into independent components: the wheel itself, the ratcheting gear, the pawl, and the linkage. This segmentation allows each component to perform its specific function simply, with the ratcheting mechanism consisting of basic gear teeth and a pawl that engage to provide unidirectional rotation control, reducing overall complexity while maintaining ease of operation.
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 allows for effortless movement of heavy loads between deployed and retracted positions, reducing the effort required to switch configurations and ensuring stability when wheels are retracted, thereby enhancing portability and usability.
Implementation Method 1
The first ratcheting pawl can couple to the load supporting frame adjacent the ratcheting gear to form a ratcheting relationship with the ratcheting gear. The ratcheting relationship can substantially allow rotation of the ratcheting gear in only a first direction relative to the first ratcheting pawl.
Implementation Method 2
The circular ratcheting gear can rotatably mount to the load supporting frame and have a plurality of teeth and an eccentric opening within the circular ratcheting gear.
Implementation Method 3
The linkage can be pivotably mounted within the opening and pivotably mounted to one or more of the wheels. Pivoting of the elongated member in one direction can cause a rotation of the ratcheting gear relative to the first ratcheting pawl and no rotation relative to the second ratcheting pawl.
Implementation Method 4
The second ratcheting pawl can be disposed to move with the elongated member to push the ratcheting gear into rotation with the elongated member.
Data Source
AI summary
A ratcheting assembly can include a housing, a ratcheting gear, a first ratchet pawl, a motion translation member, and a ratcheting actuation member. The ratcheting gear can rotatably mount within the housing and include a plurality of ratchet teeth and an eccentric opening. The eccentric opening can include a rotational center of the ratcheting gear. The first ratchet pawl can mount to the housing adjacent to the ratcheting gear to allow rotation in a first direction and to hinder rotation in a second direction opposite the first direction. The motion translation member can mount within the opening such that rotation of the ratcheting gear can cause a movement of the motion translation member via rotation of the eccentric opening. The ratcheting actuation member can mount to the housing and include a second ratchet pawl. The second ratchet pawl can mount to the ratcheting actuation member adjacent to the ratcheting gear such that actuation of the ratcheting actuation member in the first direction can cause a rotation of the ratcheting gear and actuation of the ratcheting actuation member in the second direction opposite the first direction does not cause a rotation of the ratcheting gear.