Robot Arm Overlap Reduces Interference Space
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Solution Overview
Problem
Existing robots with robot arms require significant space to move their tip end by 180° around a rotating axis, leading to interference issues and increased installation space requirements.
Innovation Solution
A robot system design where the n-th arm rotates around an n-th rotating axis, and the (n+1)th arm rotates around an (n+1)th axis orthogonal to the n-th axis, with the n-th arm being longer and overlapping the (n+1)th arm, allowing the tip end to move 180° without rotating the n-th arm, reducing interference space and simplifying installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the robot arm rotates the n-th arm to move the tip end 180° around the first rotating axis, then the position change is achieved, but a large space for preventing interference is required
Solution Approach 1:
The patent transitions from rotating the n-th arm (horizontal plane rotation) to rotating the (n+1)th arm (vertical plane rotation), changing the dimension of motion. This allows the tip end to achieve 180° position change around the first rotating axis by rotating the (n+1)th arm in the vertical direction, eliminating the need for large horizontal clearance space that would be required if the n-th arm were rotated.
2Ease of manufacture
If the robot is installed on a floor or workbench, then the installation configuration is simplified, but the robot arm structure becomes more complex
Solution Approach 1:
The patent inverts the conventional robot arm structure by making the (n+1)th arm longer than the n-th arm, contrary to the typical configuration where earlier arms are longer. This inversion allows the robot to be installed on the floor or workbench with the connection part positioned above the first surface, simplifying installation while maintaining compact dimensions through the overlapping arm configuration.
Data Source
AI summary
A robot includes: a base which is provided on a first surface; and a robot arm which is provided on the base, in which the robot arm includes an n-th arm and an (n+1)th arm, in which the n-th arm rotates around an n-th rotating axis, in which the (n+1)th arm is provided to rotate around an (n+1)th rotating axis which is an axial direction different from an axial direction of the n-th rotating axis, in the n-th arm, in which the length of the n-th arm is longer than the length of the (n+1)th arm, and, when viewed from the axial direction of the (n+1)th rotating axis, the n-th arm and the (n+1)th arm overlap each other, and in which a connection part between the base and the robot arm is positioned above the first surface in a vertical direction.