Dual-Wheel Obstacle-Crossing Mechanism With Low Friction Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing walking mechanisms, particularly wheel-type, face poor performance when encountering obstacles due to sudden height changes, while track-type mechanisms have high friction and low efficiency, making them unsuitable for daily use.
Innovation Solution
A smooth obstacle-crossing walking mechanism featuring a driving wheel with a smaller diameter and a contact wheel with a larger diameter, where the driving wheel compresses the contact wheel to enable smooth obstacle crossing by creating a 'bridge' over obstacles, maintaining parallel axles and using auxiliary wheels for enhanced structural strength and friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If wheel type walking mechanisms are used, then friction loss is low and efficiency is high, but obstacle crossing capability is poor and sudden height changes occur
Solution Approach 1:
The walking mechanism is divided into two distinct wheel types: a driving wheel for efficient propulsion on flat surfaces and a contact wheel for obstacle crossing. This segmentation allows each component to specialize in its optimal function, resolving the contradiction between low friction loss and strong obstacle crossing capability
Solution Approach 2:
The contact wheel acts as an intermediary between the driving wheel and obstacles. It transfers the driving force to overcome obstacles while the driving wheel maintains its efficient rotation, mediating between the need for obstacle crossing and energy efficiency
2Reliability
If track type walking mechanisms are used, then obstacle crossing capability is strong, but frictional forces are great and efficiency is very low
Solution Approach 1:
The mechanism separates the obstacle crossing function (contact wheel) from the propulsion function (driving wheel). The contact wheel provides the necessary friction for obstacle crossing while the driving wheel maintains low friction for efficient propulsion, resolving the contradiction between obstacle crossing capability and energy efficiency
Solution Approach 2:
Different parts of the system have different properties: the contact wheel is designed with larger diameter and different surface characteristics for high friction and obstacle crossing, while the driving wheel has optimized properties for low friction and efficient rotation, allowing each local component to optimize its function
3Reliability
If wheel diameter is increased to improve obstacle crossing, then obstacle crossing capability improves, but friction loss increases and efficiency decreases
Solution Approach 1:
The system uses two wheels with different diameters: a larger contact wheel for obstacle crossing and a smaller driving wheel for efficient propulsion. This segmentation allows the larger diameter benefit for obstacle crossing without incurring the continuous friction penalty of a always-large wheel
Solution Approach 2:
The system changes the parameter of wheel diameter based on functional requirement rather than using a fixed diameter. The contact wheel has larger diameter for obstacle crossing while the driving wheel has smaller diameter for efficiency, optimizing performance across different operational states
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
This design allows for smooth obstacle crossing without sudden height changes for the driving wheel, maintaining lower friction loss and higher efficiency, suitable for daily use scenarios.
Implementation Method 1
When the driving wheel 1 rotates actively, and in turn walks along an inner edge of the contact wheel 2 under a frictional force with the contact wheel 2
Implementation Method 2
The contact wheel 2 rolls forwards under a pressure and the frictional force of the driving wheel 1
Implementation Method 3
The driving wheel 1 compresses an inner side of the contact wheel 2 under a gravity of a vehicle body
Data Source
AI summary
The present disclosure belongs to the technical field of walking mechanisms, and provides a smooth obstacle-crossing walking mechanism, which can provide strong smooth obstacle crossing capability, meanwhile, maintains lower friction loss and higher efficiency, and is suitable for most daily use situations. A smooth obstacle-crossing walking mechanism includes a driving wheel and a contact wheel. The driving wheel has a wheel diameter lower than that of the contact wheel. The driving wheel compresses an inner edge of the contact wheel under gravity. The contact wheel is in contact with the ground surface. When the driving wheel rotates actively, it walks along the inner edge of the contact wheel under the frictional force with the contact wheel. The contact wheel rolls forwards under a pressure and the frictional force of the driving wheel, so as to enable the smooth obstacle-crossing walking mechanism to walk.