Omni-Wheel Roller Braking With Fluid Bladder Actuation
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Solution Overview
Problem
Current omni-wheels lack effective braking mechanisms that can selectively engage or disengage individual rollers to prevent lateral movement, limiting their maneuverability and transition between longitudinal and lateral movement.
Innovation Solution
An omni-wheel design incorporating a fluid-filled bladder and braking pads, where the bladder expands radially when pressurized to contact and brake individual rollers, and can be depressurized to disengage, allowing for selective control of roller rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a braking mechanism is added to the omni-wheel, then lateral movement can be prevented, but the device complexity increases
Solution Approach 1:
The braking mechanism is segmented into multiple independent brake pads, each associated with a specific roller. This allows selective braking of individual rollers rather than requiring a complex mechanism to control all rollers simultaneously, reducing overall system complexity while maintaining reliable lateral movement control.
Solution Approach 2:
A fluid-filled bladder is used as the actuating mechanism for the brake pads. By using pneumatic or hydraulic pressure, the complex mechanical linkage required for simultaneous engagement is replaced with a simpler fluid pressure system that can selectively actuate individual brake pads, reducing mechanical complexity while ensuring reliable braking action.
2Reliability
If all rollers are braked simultaneously, then lateral movement is prevented, but the maneuverability and transition between longitudinal and lateral movement is limited
Solution Approach 1:
The braking system is divided into independent segments (individual brake pads for each roller), enabling selective engagement of specific rollers. This segmentation allows the omni-wheel to brake only the necessary rollers for lateral movement prevention while leaving other rollers free for longitudinal movement, thereby maintaining maneuverability and versatility.
Solution Approach 2:
The braking system is designed to be dynamically adjustable, allowing the operator to selectively engage or disengage brake pads based on the desired movement direction. This dynamic control enables smooth transitions between longitudinal and lateral movement by activating only the appropriate rollers, enhancing adaptability and maneuverability.
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
Enables seamless transition between longitudinal and lateral movement by selectively braking rollers, enhancing maneuverability and preventing unwanted lateral movement.
Implementation Method 1
The fluid-filled bladder may expand radially outward when pressurized, displacing the plurality of braking pads radially outward to contact the plurality of rollers
Data Source
AI summary
An omni-wheel may include a shaft, a plurality of rollers, and a braking device. The plurality of rollers may be circumferentially arranged about the shaft and arranged radially outward from the shaft. The braking device may include a fluid-filled bladder and a plurality of braking pads. The fluid-filled bladder may be circumferentially arranged about the shaft. The plurality of braking pads may be arranged between the fluid-filled bladder and the plurality of rollers. The fluid-filled bladder may expand radially outward when pressurized, displacing the plurality of braking pads radially outward to contact the plurality of rollers, preventing rotation of the rollers.