Mobile Robot Leg With Axial Threaded Rod Height Adjustment
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Solution Overview
Problem
Existing mobile robots with legs have complex structures, are expensive to manufacture, and are limited in the height they can lift the robot body due to jointed segments.
Innovation Solution
A mobile robot design featuring a long, axially displaceable threaded rod with an external thread and internal engagement, allowing for three-dimensional movement of the robot leg relative to the robot body, using drives for axial displacement and pivoting, and optionally incorporating an inclination sensor for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If jointed segments are used for robot legs, then the robot can change height and tilt the body, but the structure becomes complex and expensive to manufacture
Solution Approach 1:
The patent extracts the complex jointed segment structure and replaces it with a single long rod that achieves the same functional goals (height adjustment and body tilting) through simpler axial displacement and pivoting mechanisms, thereby reducing structural complexity while maintaining adaptability
Solution Approach 2:
Instead of using multiple joints to achieve movement, the patent inverts the approach by using a single long rod that moves axially and pivots to achieve the same range of motion, effectively inverting the conventional jointed segment approach
2Adaptability or versatility
If jointed segments are used for robot legs, then the robot can change height and tilt the body, but the manufacturing cost increases
Solution Approach 1:
The patent removes the expensive jointed segment components and replaces them with simpler, more cost-effective axial displacement and pivoting mechanisms, reducing manufacturing costs while preserving the robot's ability to adjust height and tilt its body
Solution Approach 2:
The patent employs simpler, more affordable components (long rod with axial displacement and pivoting joints) instead of expensive precision jointed segments, achieving the same functional results at lower manufacturing cost
3Adaptability or versatility
If jointed segments are used for robot legs, then the robot can change height and tilt the body, but the lifting height is limited to the length of the segments
Solution Approach 1:
The patent extends the rod in the axial dimension to create a much longer lifting mechanism, allowing the robot to reach greater heights than the conventional segment length would permit, thereby overcoming the height limitation of jointed segments
4Area of moving object
If a long threaded rod is used for axial displacement, then the robot can reach greater areas, but the device complexity increases
Solution Approach 1:
The long threaded rod serves multiple functions: it provides axial displacement for height adjustment, serves as a pivot axis for rotational movement, and acts as a structural support element, thereby achieving greater reachable area without proportionally increasing device complexity
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 design enables the robot to reach greater areas, maintain stability, and operate in challenging terrains like steep paths and muddy ground, while being cost-effective and robust due to its simple structure.
Implementation Method 1
the rod is a first threaded rod with an external thread and an axially extending groove, the external thread engaging an internal thread which is connected to the robot body in a rotatable and pivotable but not axially displaceable manner
Data Source
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AI summary
The invention relates to a mobile robot comprising a robot body (1) and at least one robot leg. The aim of the invention is to produce a mobile robot which has a structure that is as simple as possible and is correspondingly robust. According to the invention, this is achieved and that the robot leg comprises an axially movable rod (2) which is pivotally guided on the robot body (1), wherein means (6, 7a, 8a, 9, 10, 11) are provided for axially moving the rod, and means (7b, 8b, 14, 15, 16) are provided for pivoting the rod (2). The robot body (1) location provided for the robot leg is equipped with an opening (22) in which the rod can be moved perpendicularly and at a variable angle relative to the opening (22).