Mobile Robot Wheel Assembly for Uneven Surface Contact
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Solution Overview
Problem
Mobile robots face issues with wheel assemblies that fail to maintain contact with uneven or slippery surfaces, leading to loss of driving power and potential malfunction due to vibration transmission when navigating obstacles or uneven terrain.
Innovation Solution
A wheel assembly design featuring a gear box with a rotatable rotation shaft, a movable wheel, and a pulling member, such as a coil spring, that allows the wheel to adjust its position relative to the robot body, ensuring continuous contact with the surface and absorbing impact, thereby enhancing stability and driving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wheel is mounted in a fixed state with respect to the robot body, then the structure is simple, but the wheel cannot maintain contact with uneven surfaces or obstacles
Solution Approach 1:
The wheel assembly incorporates a movable wheel that can change its position relative to the robot body, transitioning from a fixed state to a dynamic state. The wheel is guided by a guide groove and controlled by a pulling member to move upward when encountering obstacles or uneven surfaces, ensuring continuous contact with the running surface while maintaining structural simplicity.
2Object-affected harmful factors
If the wheel is fixed to the robot body, then assembly is simple, but impact and vibration are transmitted directly to the robot body
Solution Approach 1:
The guide groove acts as an intermediary mechanism between the wheel and the robot body. It provides a controlled path for the wheel to move upward, absorbing impact and reducing vibration transmission to the robot body while maintaining a relatively simple overall structure.
3Adaptability or versatility
If the wheel cannot move vertically, then the structure is simple, but the robot cannot pass over obstacles taller than the wheel protrusion
Solution Approach 1:
The wheel assembly enables vertical movement of the wheel through a guide groove and pulling member mechanism. When the robot encounters an obstacle taller than the wheel protrusion, the wheel moves upward along the guide groove, allowing the robot to pass over the obstacle while maintaining a relatively simple structural design.
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 wheel assembly maintains contact with surfaces on uneven terrain, reduces loss of driving power, and attenuates vibrations, ensuring smooth operation and preventing component malfunctions when encountering obstacles or slippery surfaces.
Implementation Method 1
a pulling member which has one end fixed to the first fixing part, and the other end fixed to a second fixing part a position of which is fixed with respect to the robot body, and pulls the first fixing part toward the second fixing part side so as to rotate the gear box in a direction in which the wheel is moved down with respect to the robot body
Implementation Method 2
a wheel which is coupled to a rotary shaft of the driven gear so as to be rotated integrally with the driven gear, and moved up or down with respect to the robot body when the gear box is rotated
Data Source
AI summary
The present invention relates to a mobile robot, in which a wheel is mounted on a robot body in an elevatable structure.