Robot Arm Posture Stabilization Jig for Safe Maintenance
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Solution Overview
Problem
Existing robot maintenance methods face challenges in stabilizing the tensile force between the rotation base and arm during maintenance, leading to potential changes in the arm's posture due to external forces or weight, which can result in unsafe conditions during part replacement.
Innovation Solution
The robot incorporates a jig with a first and multiple second attachment portions to restrict the displacement of a balancer in the axial direction, ensuring the arm maintains a stable posture by attaching the jig to specific second attachment portions based on the arm's position, preventing unintended posture changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the arm is stopped with the arm taking a predetermined posture for maintenance, then the maintenance operation can be performed, but the arm's posture may change due to external forces or weight, leading to unsafe conditions
Solution Approach 1:
The jig is attached to the arm before maintenance operations begin, preliminarily stabilizing the arm in its predetermined posture. This preliminary action prevents posture changes during maintenance by counteracting external forces and weight effects on the arm, ensuring safety throughout the maintenance process.
2Reliability
If a jig is used to restrict displacement of the balancer, then the arm's posture is stabilized, but the complexity of the maintenance setup increases
Solution Approach 1:
The jig is divided into multiple detachable components that can be attached to and removed from the arm. This segmentation allows the stabilization function to be applied only when needed during maintenance, reducing overall system complexity while maintaining reliability when the jig is engaged.
Solution Approach 2:
The jig acts as an intermediary device between the arm and the maintenance operator. It provides a simple mechanical interface that stabilizes the arm without requiring complex control systems or multiple specialized tools, thereby reducing maintenance setup complexity while ensuring posture stability.
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 ensures safe and stable maintenance by maintaining the arm's posture during part replacement, reducing the risk of errors and ensuring the tensile force remains effective, thereby enhancing safety and reliability.
Implementation Method 1
The balancer is coupled to the rotation base and the arm to provide force to between the rotation base and the arm
Data Source
AI summary
A robot includes a base. A rotation base is coupled to the base and rotatable about a rotation axis relative to the base. An arm includes a base end that is coupled to the rotation base and that is turnable relative to the rotation base about a turning axis that is approximately perpendicular to the rotation axis. A balancer is coupled to the rotation base and the arm to provide force to between the rotation base and the arm. To a first attachment portion, one end of a jig is attachable to restrict displacement of the balancer in an axial direction. The first attachment portion is disposed at a coupling portion where the balancer and the arm are coupled to each other. To second attachment portions, another end of the jig is attachable. The second attachment portions are disposed at a predetermined distance from the rotation base.