Robot Arm Assembly Limiting Structure for Cable Protection
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Solution Overview
Problem
Industrial robot arm assemblies often experience mis-operation leading to multiple rotations of one arm around another, causing cable damage due to the lack of effective limiting structures.
Innovation Solution
The implementation of a robot arm assembly with a limiting structure that includes a main base, joint, and arm configuration, featuring limit members and a resisting portion that prevent excessive rotation by engaging with a limiting post and utilizing a sensor to stop the driving assembly when the limit is reached, thereby preventing cable damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple rotations are allowed for flexibility, then adaptability is improved, but cable damage risk increases
Solution Approach 1:
The patent applies preliminary action by pre-installing limiting structures (limiting posts and limit members) on the robot arm assembly before operation begins. These structures are positioned in advance to engage with the cable routing paths, preventing excessive rotation from occurring in the first place rather than reacting after damage has occurred. The limit members are pre-configured to contact the limiting posts at predetermined rotation angles, establishing physical boundaries before any harmful rotation can happen.
2Reliability
If limiting structures are added, then cable protection is improved, but device complexity increases
Solution Approach 1:
The patent merges the limiting structure with existing components of the robot arm assembly. The limiting posts are integrated into the arm links, and the limit members are incorporated into the joint structures. This merging approach allows the limiting function to be achieved without adding completely separate, independent components. The limiting structures share materials and manufacturing processes with the main arm assembly, reducing overall complexity while still providing the necessary protection.
3Reliability
If rotation is restricted, then cable damage is prevented, but operational freedom decreases
Solution Approach 1:
The patent applies local quality by implementing limiting structures only at specific critical locations where cable routing occurs and excessive rotation would cause damage. Rather than restricting rotation throughout the entire arm assembly, the limiting posts and limit members are positioned locally at predetermined angles where the cables are vulnerable. This allows free rotation to occur in safe zones while providing protection only where needed, maintaining operational freedom while preventing cable damage.
Data Source
AI summary
A robot arm assembly includes a main base, a joint and at least one arm. The main base includes a main body, and the main body includes a mounting portion and a limiting post on a side of the mounting portion. The joint is rotatably mounted on the mounting portion and includes a limit piece corresponding to the limiting post. The at least one arm is fixed to the joint, when the arm rotates relative to the main base to a predetermined extent of rotation, the limit piece abuts against the limiting post to stop the rotation of the arm.