Caster Wheel Pivot Block Bumper Flutter
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Solution Overview
Problem
Existing caster wheel systems for manually moved vehicles often experience flutter and tipping due to uneven wheel contact, as three wheels may not maintain contact with the ground, lacking effective adjustment mechanisms to align or stabilize the fourth wheel.
Innovation Solution
A caster wheel system comprising an axle assembly, wheel fork assembly, and pivot block assembly with a bumper that inhibits flutter by allowing the wheel fork to pivot slightly backwards under weight, ensuring all four wheels contact the ground, featuring adjustable components and a compressible bumper for stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional caster wheel systems are used without adjustment mechanisms, then the structure is simple, but the wheels cannot maintain proper contact with the ground causing tipping and instability
Solution Approach 1:
The caster assembly incorporates adjustable height mechanisms that allow the wheel assembly to be dynamically adjusted to different positions, enabling the wheels to maintain proper contact with the ground surface and prevent tipping while providing adaptability to various loading conditions
Solution Approach 2:
The system allows changing of geometric parameters (wheel height, alignment angles) through adjustment mechanisms, enabling optimization of wheel-ground contact conditions to eliminate tipping and improve stability without requiring complex active control systems
2Reliability
If rigid bumper structures are used to prevent flutter, then flutter resistance is improved, but the wheel fork cannot pivot backwards to allow weight-driven alignment
Solution Approach 1:
The bumper is constructed from resilient elastomeric material that provides flutter resistance through its damping properties while simultaneously allowing controlled backward pivoting of the wheel fork assembly under weight loading, enabling weight-driven alignment without rigid constraints
Solution Approach 2:
The elastomeric bumper material provides nonlinear mechanical properties that change with deformation, offering rigid support against lateral flutter movements while permitting controlled angular displacement for backward pivoting and weight-driven alignment
3Reliability
If resilient wheel structures are used to reduce flutter, then flutter resistance is improved, but additional power from the user or drive system is required to accommodate turns
Solution Approach 1:
The patent extracts the flutter resistance function from the wheel structure itself and relocates it to the bumper component, allowing the wheel to maintain its original low-friction rolling elements and bearing structure that require minimal power for turning while the bumper provides the desired flutter resistance
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 system effectively reduces flutter and tipping by ensuring all wheels maintain contact with the ground, enhancing the stability and smooth operation of manually moved vehicles.
Implementation Method 1
the pivot block assembly also has a bumper which acts to inhibit flutter and allow the wheel fork assembly to pivot slightly backwards and upwards to provide a weight driven alignment
Implementation Method 2
The resilient elastomeric bumper in conjunction with the pivot block provides a means to reduce the flutter of the wheel assembly while still permitting the wheel to pivot
Data Source
AI summary
A caster wheel system comprising an axle assembly, wheel fork assembly and pivot block assembly. The axle assembly operationally couples the system to a vehicle, the wheel fork assembly includes a wheel rotatably coupled to a wheel fork member, the pivot block provides a coupling interface between the axle assembly and the wheel fork assembly, the pivot block assembly also has a bumper which acts to inhibit flutter and allow the wheel fork assembly to pivot slightly backwards when sufficient weight is applied to inhibit tipping where only three wheels of a four wheel system contact the ground, thereby allowing all wheels to contact the ground during operation.