Spherical Robot Ring Member Friction Reduction
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Solution Overview
Problem
Conventional robots using wheels face issues with surface friction and maintenance costs, while caterpillar tracks require costly maintenance due to numerous components.
Innovation Solution
A spherical robot design featuring a ring member that rotates about a central point, reducing friction by applying a separating force through compressed air and magnetic interactions, allowing independent control of rolling and rotary motions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wheels are used for robot movement, then the robot can travel efficiently on smooth ground, but the wheels require smooth ground and even small obstacles can interfere with movement
Solution Approach 1:
The patent applies spheroidality by using a spherical body instead of conventional wheeled structures. The spherical shape allows the robot to roll over obstacles and adapt to various terrains without getting stuck, as the curved surface can naturally navigate over bumps and irregularities that would block wheeled movement.
Solution Approach 2:
The patent replaces the conventional wheel-mechanism with a spherical rolling mechanism. Instead of using wheels that rotate on axles, the entire body becomes a rolling sphere, eliminating the need for complex wheel assemblies and improving terrain adaptability while maintaining movement efficiency.
2Adaptability or versatility
If caterpillar tracks are used for robot movement, then the robot can navigate various terrains, but costly maintenance is required due to a large number of components
Solution Approach 1:
The patent extracts and eliminates the complex track system with multiple components (links, pins, rollers) by replacing it with a simple spherical body. This extraction of unnecessary components directly reduces maintenance requirements and manufacturing complexity while preserving terrain adaptability through the spherical rolling mechanism.
Solution Approach 2:
The spherical design is self-service in nature, requiring no external lubrication, adjustment, or maintenance of moving parts. The entire body rolls as a single unit without internal friction points that would require maintenance, unlike caterpillar tracks which have numerous moving parts needing regular servicing.
3Ease of operation
If the ring member contacts the body surface directly, then friction occurs, but maintaining a predetermined interval reduces surface friction and damage
Solution Approach 1:
The patent introduces compressed air as an intermediary between the ring member and the body surface. The compressed air creates a cushioning layer that separates the two surfaces, eliminating direct contact and friction while allowing the ring member to rotate smoothly. This intermediary approach resolves the contradiction by enabling smooth rotation without surface friction.
Solution Approach 2:
The patent applies pneumatics by using compressed air to maintain a predetermined interval between the ring member and the body. The pneumatic pressure creates a non-contact bearing effect, allowing the ring to rotate freely without mechanical friction or wear, thus improving ease of operation while eliminating harmful surface friction.
4Force
If magnets are placed close to the body surface, then magnetic interaction strength increases, but the ring member and body may contact causing friction
Solution Approach 1:
The patent uses compressed air as an intermediary to maintain a predetermined interval between the magnets on the ring member and the body surface. This allows the magnets to exert strong magnetic forces on ferrous materials without direct contact, achieving high magnetic interaction force while avoiding the harmful effect of surface friction.
Solution Approach 2:
The patent replaces potential mechanical contact between the ring member and body with magnetic interaction. By positioning magnets close to the body surface without contact, the system uses magnetic force instead of mechanical friction to achieve the desired interaction, eliminating surface friction while maintaining strong force.
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 effectively reduces surface friction and maintenance needs by maintaining a predetermined interval between the ring member and the body, enhancing mobility and reducing damage from contact.
Implementation Method 1
a compressor formed on the sidewall and configured to supply compressed air into the second space
Implementation Method 2
reducing friction by applying a separating force through compressed air and magnetic interactions
Data Source
AI summary
Disclosed is a spherical robot may include a body having a substantially spherical shape; and a ring member having a ring shape, the ring member being coupled to the body so as to be rotated about the body, wherein the ring member includes an inner surface configured to face a surface of the body and an outer surface opposite to the inner surface.