Multi-axis Robot Guide Pipe Offset for Cable Rotation
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Solution Overview
Problem
Conventional multi-axis robots face challenges in managing the stretching of linear bodies due to the rotation of rotating units, requiring a compact configuration to maintain efficiency and prevent damage, especially when the linear bodies are inserted perpendicularly to the central axis of the base.
Innovation Solution
A multi-axis robot design featuring a guide pipe with a rotational center that deviates from the linear body's center, allowing the linear body to form a bending portion around the guide pipe, which is then guided through a notch and inner space, absorbing twisting and stretching by deformation, and using a guide member to stabilize motion and prevent separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the linear body is inserted perpendicularly to the central axis of the base to improve space utilization and painting efficiency, then the painting booth can be made more compact, but the linear body experiences stretching due to the rotation of the rotating unit
Solution Approach 1:
The linear body is configured to form a bending portion with a curved shape around the outer peripheral surface of the guide pipe instead of extending straight. This curvature allows the linear body to accommodate the rotational movement of the support member while reducing stretching, enabling perpendicular insertion that saves space without compromising reliability
Solution Approach 2:
The linear body is divided into distinct functional portions: a bending portion that wraps around the guide pipe to handle rotation, a middle portion that passes through the guide pipe, and an end portion that extends to the rotating unit. This segmentation allows each portion to perform its specific function, with the bending portion absorbing rotational stress while maintaining overall integrity
2Reliability
If a configuration is added to deal with stretching of the linear body, then the linear body integrity is maintained, but the device complexity increases
Solution Approach 1:
The guide pipe serves as an intermediary element between the base and the rotating unit. It provides a guided path for the linear body, allowing the bending portion to wrap around it smoothly. This intermediary structure simplifies the overall configuration by providing a natural axis for the linear body to follow during rotation, eliminating the need for complex additional mechanisms
Solution Approach 2:
The guide pipe is positioned such that its rotational center deviates from the center of the linear body, creating an offset configuration. This offset arrangement allows the linear body to rotate along with the support member while maintaining a consistent bending radius, effectively distributing the rotational stress and simplifying the design
3Reliability
If the bending portion is made long to accommodate rotation, then the linear body can handle the rotation, but the overall robot size increases
Solution Approach 1:
The guide pipe is positioned with its rotational center offset from the center of the linear body, creating an asymmetric configuration. This asymmetry allows the bending portion to wrap around the guide pipe in a compact manner, accommodating the rotational movement within a smaller space and reducing the overall length of the base
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 configuration reduces the length of the bending portion, allows for a compact robot setup, effectively absorbs twisting and stretching, and prevents damage, enabling a wider range of rotation while maintaining the linear bodies' integrity and preventing unintended contact with the base.
Implementation Method 1
a bending portion is formed around an outer peripheral surface of the guide pipe... such that the first linear body extends to reach the notch from radially outside of the guide pipe, such that a bending portion is formed around an outer peripheral surface of the guide pipe
Implementation Method 2
effectively absorbs twisting and stretching, and prevents damage, enabling a wider range of rotation while maintaining the linear bodies' integrity
Data Source
AI summary
A multi-axis robot includes: a base with a hollow; a support member with a hollow, the support member constituting a proximal end portion of an arm of the multi-axis robot; and a guide pipe configured to rotate together with the support member, the guide pipe being configured such that one end of the guide pipe is rotatably inserted in the base, and inner space of the guide pipe is in communication with inner space of the support member and inner space of the base. A notch is formed in a peripheral surface of an end portion of the guide pipe, the end portion being positioned in the base. A motor cable extends to reach the notch from radially outside of the guide pipe.